ImStrv: standardized code doing format copy, optimized ImStrStr

Ref issue 4149

.github/workflows/build.yml

@@ -246,7 +246,7 @@ jobs:
           #include "examples/example_null/main.cpp"
 
           EOF
-          g++ -I. -Wall -Wformat -Wextra -Werror -Wno-zero-as-null-pointer-constant -Wno-double-promotion -Wno-variadic-macros -Wno-empty-body -o example_single_file example_single_file.cpp
+          g++ -I. -std=c++11 -Wall -Wformat -Wextra -Werror -Wno-zero-as-null-pointer-constant -Wno-double-promotion -Wno-variadic-macros -Wno-empty-body -o example_single_file example_single_file.cpp
 
     - name: Build example_null (freetype)
       run: |
@@ -262,7 +262,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with ImWchar32)
       run: |
@@ -274,7 +274,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with large ImDrawIdx + pointer ImTextureID)
       run: |
@@ -287,7 +287,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with IMGUI_DISABLE_OBSOLETE_FUNCTIONS)
       run: |
@@ -299,7 +299,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with IMGUI_DISABLE_OBSOLETE_KEYIO)
       run: |
@@ -311,7 +311,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with IMGUI_DISABLE_DEMO_WINDOWS and IMGUI_DISABLE_METRICS_WINDOW)
       run: |
@@ -324,7 +324,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with IMGUI_DISABLE_FILE_FUNCTIONS)
       run: |
@@ -336,7 +336,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with IMGUI_USE_BGRA_PACKED_COLOR)
       run: |
@@ -348,7 +348,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (with IM_VEC2_CLASS_EXTRA and IM_VEC4_CLASS_EXTRA)
       run: |
@@ -368,7 +368,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        g++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        g++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (without c++ runtime, Clang)
       run: |
@@ -380,7 +380,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        clang++ -I. -Wall -Wformat -nodefaultlibs -fno-rtti -fno-exceptions -fno-threadsafe-statics -lc -lm -o example_single_file example_single_file.cpp
+        clang++ -I. -std=c++11 -Wall -Wformat -nodefaultlibs -fno-rtti -fno-exceptions -fno-threadsafe-statics -lc -lm -o example_single_file example_single_file.cpp
 
     - name: Build example_glfw_opengl2
       run: make -C examples/example_glfw_opengl2
@@ -397,7 +397,7 @@ jobs:
       run: make -C examples/example_sdl_opengl3
 
     - name: Build with IMGUI_IMPL_VULKAN_NO_PROTOTYPES
-      run: g++ -c -I. -DIMGUI_IMPL_VULKAN_NO_PROTOTYPES=1 backends/imgui_impl_vulkan.cpp
+      run: g++ -c -I. -std=c++11 -DIMGUI_IMPL_VULKAN_NO_PROTOTYPES=1 backends/imgui_impl_vulkan.cpp
 
   MacOS:
     runs-on: macos-latest
@@ -420,7 +420,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        clang++ -I. -Wall -Wformat -o example_single_file example_single_file.cpp
+        clang++ -I. -std=c++11 -Wall -Wformat -o example_single_file example_single_file.cpp
 
     - name: Build example_null (without c++ runtime)
       run: |
@@ -431,7 +431,7 @@ jobs:
         #include "examples/example_null/main.cpp"
 
         EOF
-        clang++ -I. -Wall -Wformat -nodefaultlibs -fno-rtti -fno-exceptions -fno-threadsafe-statics -lc -lm -o example_single_file example_single_file.cpp
+        clang++ -I. -std=c++11 -Wall -Wformat -nodefaultlibs -fno-rtti -fno-exceptions -fno-threadsafe-statics -lc -lm -o example_single_file example_single_file.cpp
 
     - name: Build example_glfw_opengl2
       run: make -C examples/example_glfw_opengl2

backends/imgui_impl_osx.mm

@@ -648,7 +648,7 @@ bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
             wheel_dx = [event deltaX];
             wheel_dy = [event deltaY];
         }
-        if (wheel_dx != 0.0 || wheel_dx != 0.0)
+        if (wheel_dx != 0.0 || wheel_dy != 0.0)
             io.AddMouseWheelEvent((float)wheel_dx * 0.1f, (float)wheel_dy * 0.1f);
 
         return io.WantCaptureMouse;

docs/CHANGELOG.txt

@@ -31,6 +31,40 @@ HOW TO UPDATE?
 - Please report any issue!
 
 
+-----------------------------------------------------------------------
+ VERSION 1.88 WIP (In Progress)
+-----------------------------------------------------------------------
+
+Breaking changes:
+
+Other Changes:
+
+- IO: Fixed backward-compatibility regression introduced in 1.87: (#4921, #4858)
+  - Direct accesses to io.KeysDown[] with legacy indices didn't work (with new backends).
+  - Direct accesses to io.KeysDown[GetKeyIndex(XXX)] would access invalid data (with old/new backends).
+  - Calling IsKeyDown() didn't have those problems, and is recommended as io.KeysDown[] is obsolete.
+- IO: Fixed input queue trickling of interleaved keys/chars events (which are frequent especially
+  when holding down a key as OS submits chars repeat events) delaying key presses and mouse movements.
+  In particular, using the input system for fast game-like actions (e.g. WASD camera move) would
+  typically have been impacted, as well as holding a key while dragging mouse. Constraints have
+  been lifted and are now only happening when e.g. an InputText() widget is active. (#4921, #4858)
+  Not that even thought you shouldn't need to disable io.ConfigInputTrickleEventQueue, you can
+  technically dynamically change its setting based on the context (e.g. disable only when hovering
+  or interacting with a game/3D view).
+- Clipper: Fixed a regression in 1.86 when not calling clipper.End() and late destructing the
+  clipper instance. High-level languages (Lua,Rust etc.) would typically be affected. (#4822)
+- IsItemHovered(): added ImGuiHoveredFlags_NoNavOverride to disable the behavior where the
+  return value is overriden by focus when gamepad/keyboard navigation is active.
+- Inputs: Fixed IsMouseClicked() repeat mode rate being half of keyboard repeat rate.
+- ColorEdit: Fixed text baseline alignment after a SameLine() after a ColorEdit() with visible label.
+- Stack Tool: Added option to copy item path to clipboard. (#4631)
+- Misc: Fixed IsAnyItemHovered() returning false when using navigation.
+- Misc: Added constexpr to ImVec2/ImVec4 inline constructors. (#4995) [@Myriachan]
+- Misc: binary_to_compressed_c tool: Added -nostatic option. (#5021) [@podsvirov]
+- ImVector: Fixed erase() with empty range. (#5009) [@thedmd]
+- Drawlist: Fixed PathArcTo() emitting terminating vertices too close to arc vertices. (#4993) [@thedmd]
+
+
 -----------------------------------------------------------------------
  VERSION 1.87 (Released 2022-02-07)
 -----------------------------------------------------------------------
@@ -103,7 +137,6 @@ Breaking Changes:
   better support for IME. Updated backends accordingly. Because the old field is set by existing backends,
   we are keeping it (marked as obsolete).
 
-
 Other Changes:
 
 - IO: Added event based input queue API, which now trickles events to support low framerates. [@thedmd, @ocornut]

examples/example_glfw_metal/Makefile

@@ -17,7 +17,7 @@ LIBS = -framework Metal -framework MetalKit -framework Cocoa -framework IOKit -f
 LIBS += -L/usr/local/lib -L/opt/homebrew/lib
 LIBS += -lglfw
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends -I/usr/local/include -I/opt/homebrew/include
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends -I/usr/local/include -I/opt/homebrew/include
 CXXFLAGS += -Wall -Wformat
 CFLAGS = $(CXXFLAGS)
 

examples/example_glfw_opengl2/Makefile

@@ -22,7 +22,7 @@ SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

examples/example_glfw_opengl3/Makefile

@@ -23,7 +23,7 @@ OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 LINUX_GL_LIBS = -lGL
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

examples/example_glut_opengl2/Makefile

@@ -17,7 +17,7 @@ SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glut.cpp $(IMGUI_DIR)/backends/imgui
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

examples/example_null/Makefile

@@ -17,7 +17,7 @@ SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 
-CXXFLAGS += -I$(IMGUI_DIR)
+CXXFLAGS += -std=c++11 -I$(IMGUI_DIR)
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 
@@ -52,7 +52,7 @@ endif
 ifeq ($(UNAME_S), Darwin) #APPLE
 	ECHO_MESSAGE = "Mac OS X"
 	ifeq ($(WITH_EXTRA_WARNINGS), 1)
-		CXXFLAGS += -Weverything -Wno-reserved-id-macro -Wno-c++98-compat-pedantic -Wno-padded -Wno-c++11-long-long -Wno-poison-system-directories
+		CXXFLAGS += -Weverything -Wno-reserved-id-macro -Wno-c++98-compat-pedantic -Wno-padded -Wno-poison-system-directories
 	endif
 	CFLAGS = $(CXXFLAGS)
 endif

examples/example_sdl_metal/Makefile

@@ -17,7 +17,7 @@ LIBS = -framework Metal -framework MetalKit -framework Cocoa -framework IOKit -f
 LIBS += `sdl2-config --libs`
 LIBS += -L/usr/local/lib
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends -I/usr/local/include
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends -I/usr/local/include
 CXXFLAGS += `sdl2-config --cflags`
 CXXFLAGS += -Wall -Wformat
 CFLAGS = $(CXXFLAGS)

examples/example_sdl_opengl2/Makefile

@@ -22,7 +22,7 @@ SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl.cpp $(IMGUI_DIR)/backends/imgui_
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

examples/example_sdl_opengl3/Makefile

@@ -23,7 +23,7 @@ OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 LINUX_GL_LIBS = -lGL
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

examples/example_sdl_sdlrenderer/Makefile

@@ -22,7 +22,7 @@ SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl.cpp $(IMGUI_DIR)/backends/imgui_
 OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
 UNAME_S := $(shell uname -s)
 
-CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
+CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
 CXXFLAGS += -g -Wall -Wformat
 LIBS =
 

imconfig.h

@@ -82,14 +82,23 @@
 // This will be inlined as part of ImVec2 and ImVec4 class declarations.
 /*
 #define IM_VEC2_CLASS_EXTRA                                                     \
-        ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \
+        constexpr ImVec2(const MyVec2& f) : x(f.x), y(f.y) {}                   \
         operator MyVec2() const { return MyVec2(x,y); }
 
 #define IM_VEC4_CLASS_EXTRA                                                     \
-        ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; }     \
+        constexpr ImVec4(const MyVec4& f) : x(f.x), y(f.y), z(f.z), w(f.w) {}   \
         operator MyVec4() const { return MyVec4(x,y,z,w); }
 */
 
+//---- Define constructor to convert your string type to ImStrv (which is a non-owning begin/end pair)
+// This will be inlined as part of ImStrv class declaration.
+// This has two benefits: you won't need to use .c_str(), if length is already computed it is faster.
+//#include <string>
+//#include <string_view>
+//#define IM_STR_CLASS_EXTRA    ImStrv(const std::string& s)      { Begin = s.c_str(); End = Begin + s.length(); }
+//#define IM_STR_CLASS_EXTRA    ImStrv(const std::string_view& s) { Begin = s.data(); End = Begin + s.length(); }
+//#define IM_STR_CLASS_EXTRA    ImStrv(const MyString& s)         { Begin = s.Data; End = s.end(); }
+
 //---- Use 32-bit vertex indices (default is 16-bit) is one way to allow large meshes with more than 64K vertices.
 // Your renderer backend will need to support it (most example renderer backends support both 16/32-bit indices).
 // Another way to allow large meshes while keeping 16-bit indices is to handle ImDrawCmd::VtxOffset in your renderer.

imgui.h

@@ -1,4 +1,4 @@
-// dear imgui, v1.87
+// dear imgui, v1.88 WIP
 // (headers)
 
 // Help:
@@ -64,8 +64,8 @@ Index of this file:
 
 // Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals. Work in progress versions typically starts at XYY99 then bounce up to XYY00, XYY01 etc. when release tagging happens)
-#define IMGUI_VERSION               "1.87"
+#define IMGUI_VERSION               "1.88 WIP"
-#define IMGUI_VERSION_NUM           18700
+#define IMGUI_VERSION_NUM           18709
 #define IMGUI_CHECKVERSION()        ImGui::DebugCheckVersionAndDataLayout(IMGUI_VERSION, sizeof(ImGuiIO), sizeof(ImGuiStyle), sizeof(ImVec2), sizeof(ImVec4), sizeof(ImDrawVert), sizeof(ImDrawIdx))
 #define IMGUI_HAS_TABLE
 
@@ -249,8 +249,8 @@ IM_MSVC_RUNTIME_CHECKS_OFF
 struct ImVec2
 {
     float                                   x, y;
-    ImVec2()                                { x = y = 0.0f; }
+    constexpr ImVec2()                      : x(0.0f), y(0.0f) { }
-    ImVec2(float _x, float _y)              { x = _x; y = _y; }
+    constexpr ImVec2(float _x, float _y)    : x(_x), y(_y) { }
     float  operator[] (size_t idx) const    { IM_ASSERT(idx <= 1); return (&x)[idx]; }    // We very rarely use this [] operator, the assert overhead is fine.
     float& operator[] (size_t idx)          { IM_ASSERT(idx <= 1); return (&x)[idx]; }    // We very rarely use this [] operator, the assert overhead is fine.
 #ifdef IM_VEC2_CLASS_EXTRA
@@ -262,12 +262,33 @@ struct ImVec2
 struct ImVec4
 {
     float                                                     x, y, z, w;
-    ImVec4()                                        { x = y = z = w = 0.0f; }
+    constexpr ImVec4()                                        : x(0.0f), y(0.0f), z(0.0f), w(0.0f) { }
-    ImVec4(float _x, float _y, float _z, float _w)  { x = _x; y = _y; z = _z; w = _w; }
+    constexpr ImVec4(float _x, float _y, float _z, float _w)  : x(_x), y(_y), z(_z), w(_w) { }
 #ifdef IM_VEC4_CLASS_EXTRA
     IM_VEC4_CLASS_EXTRA     // Define additional constructors and implicit cast operators in imconfig.h to convert back and forth between your math types and ImVec4.
 #endif
 };
+
+// String view (non-owning pair of begin/end pointers, not necessarily zero-terminated)
+// ImStrv are used as function parameters instead of passing a pair of const char*.
+#define IMGUI_HAS_IMSTR
+struct ImStrv
+{
+    const char* Begin;
+    const char* End;
+    ImStrv()                            { Begin = End = NULL; }
+    ImStrv(const char* b)               { Begin = b; End = b ? b + strlen(b) : NULL; }
+    ImStrv(const char* b, const char* e){ Begin = b; End = e ? e : b + strlen(b); }
+    inline size_t length() const        { return (size_t)(End - Begin); }
+    inline bool empty() const           { return Begin == End; }    // == "" or == NULL
+    inline operator bool() const        { return Begin != NULL; }   // return true when valid ("" is valid, NULL construction is not)
+#ifdef IM_STR_CLASS_EXTRA
+    IM_STR_CLASS_EXTRA     // Define additional constructor in imconfig.h to convert your string types (e.g. std::string, std::string_view) to ImStrV.
+#endif
+    // private: bool operator==(ImStrv) { return false; } // [DEBUG] Uncomment to catch undesirable uses of operators
+    // private: bool operator!=(ImStrv) { return false; }
+};
+
 IM_MSVC_RUNTIME_CHECKS_RESTORE
 
 //-----------------------------------------------------------------------------
@@ -300,8 +321,8 @@ namespace ImGui
     IMGUI_API void          ShowStackToolWindow(bool* p_open = NULL);   // create Stack Tool window. hover items with mouse to query information about the source of their unique ID.
     IMGUI_API void          ShowAboutWindow(bool* p_open = NULL);       // create About window. display Dear ImGui version, credits and build/system information.
     IMGUI_API void          ShowStyleEditor(ImGuiStyle* ref = NULL);    // add style editor block (not a window). you can pass in a reference ImGuiStyle structure to compare to, revert to and save to (else it uses the default style)
-    IMGUI_API bool          ShowStyleSelector(const char* label);       // add style selector block (not a window), essentially a combo listing the default styles.
+    IMGUI_API bool          ShowStyleSelector(ImStrv label);            // add style selector block (not a window), essentially a combo listing the default styles.
-    IMGUI_API void          ShowFontSelector(const char* label);        // add font selector block (not a window), essentially a combo listing the loaded fonts.
+    IMGUI_API void          ShowFontSelector(ImStrv label);             // add font selector block (not a window), essentially a combo listing the loaded fonts.
     IMGUI_API void          ShowUserGuide();                            // add basic help/info block (not a window): how to manipulate ImGui as a end-user (mouse/keyboard controls).
     IMGUI_API const char*   GetVersion();                               // get the compiled version string e.g. "1.80 WIP" (essentially the value for IMGUI_VERSION from the compiled version of imgui.cpp)
 
@@ -322,7 +343,7 @@ namespace ImGui
     //    BeginPopup/EndPopup, etc. where the EndXXX call should only be called if the corresponding BeginXXX function
     //    returned true. Begin and BeginChild are the only odd ones out. Will be fixed in a future update.]
     // - Note that the bottom of window stack always contains a window called "Debug".
-    IMGUI_API bool          Begin(const char* name, bool* p_open = NULL, ImGuiWindowFlags flags = 0);
+    IMGUI_API bool          Begin(ImStrv name, bool* p_open = NULL, ImGuiWindowFlags flags = 0);
     IMGUI_API void          End();
 
     // Child Windows
@@ -333,7 +354,7 @@ namespace ImGui
     //   [Important: due to legacy reason, this is inconsistent with most other functions such as BeginMenu/EndMenu,
     //    BeginPopup/EndPopup, etc. where the EndXXX call should only be called if the corresponding BeginXXX function
     //    returned true. Begin and BeginChild are the only odd ones out. Will be fixed in a future update.]
-    IMGUI_API bool          BeginChild(const char* str_id, const ImVec2& size = ImVec2(0, 0), bool border = false, ImGuiWindowFlags flags = 0);
+    IMGUI_API bool          BeginChild(ImStrv str_id, const ImVec2& size = ImVec2(0, 0), bool border = false, ImGuiWindowFlags flags = 0);
     IMGUI_API bool          BeginChild(ImGuiID id, const ImVec2& size = ImVec2(0, 0), bool border = false, ImGuiWindowFlags flags = 0);
     IMGUI_API void          EndChild();
 
@@ -363,10 +384,10 @@ namespace ImGui
     IMGUI_API void          SetWindowCollapsed(bool collapsed, ImGuiCond cond = 0);                     // (not recommended) set current window collapsed state. prefer using SetNextWindowCollapsed().
     IMGUI_API void          SetWindowFocus();                                                           // (not recommended) set current window to be focused / top-most. prefer using SetNextWindowFocus().
     IMGUI_API void          SetWindowFontScale(float scale);                                            // [OBSOLETE] set font scale. Adjust IO.FontGlobalScale if you want to scale all windows. This is an old API! For correct scaling, prefer to reload font + rebuild ImFontAtlas + call style.ScaleAllSizes().
-    IMGUI_API void          SetWindowPos(const char* name, const ImVec2& pos, ImGuiCond cond = 0);      // set named window position.
+    IMGUI_API void          SetWindowPos(ImStrv name, const ImVec2& pos, ImGuiCond cond = 0);           // set named window position.
-    IMGUI_API void          SetWindowSize(const char* name, const ImVec2& size, ImGuiCond cond = 0);    // set named window size. set axis to 0.0f to force an auto-fit on this axis.
+    IMGUI_API void          SetWindowSize(ImStrv name, const ImVec2& size, ImGuiCond cond = 0);         // set named window size. set axis to 0.0f to force an auto-fit on this axis.
-    IMGUI_API void          SetWindowCollapsed(const char* name, bool collapsed, ImGuiCond cond = 0);   // set named window collapsed state
+    IMGUI_API void          SetWindowCollapsed(ImStrv name, bool collapsed, ImGuiCond cond = 0);        // set named window collapsed state
-    IMGUI_API void          SetWindowFocus(const char* name);                                           // set named window to be focused / top-most. use NULL to remove focus.
+    IMGUI_API void          SetWindowFocus(ImStrv name);                                                // set named window to be focused / top-most. use NULL to remove focus.
 
     // Content region
     // - Retrieve available space from a given point. GetContentRegionAvail() is frequently useful.
@@ -462,17 +483,16 @@ namespace ImGui
     // - You can also use the "Label##foobar" syntax within widget label to distinguish them from each others.
     // - In this header file we use the "label"/"name" terminology to denote a string that will be displayed + used as an ID,
     //   whereas "str_id" denote a string that is only used as an ID and not normally displayed.
-    IMGUI_API void          PushID(const char* str_id);                                     // push string into the ID stack (will hash string).
+    IMGUI_API void          PushID(ImStrv str_id);                                          // push string into the ID stack (will hash string).
-    IMGUI_API void          PushID(const char* str_id_begin, const char* str_id_end);       // push string into the ID stack (will hash string).
     IMGUI_API void          PushID(const void* ptr_id);                                     // push pointer into the ID stack (will hash pointer).
     IMGUI_API void          PushID(int int_id);                                             // push integer into the ID stack (will hash integer).
     IMGUI_API void          PopID();                                                        // pop from the ID stack.
-    IMGUI_API ImGuiID       GetID(const char* str_id);                                      // calculate unique ID (hash of whole ID stack + given parameter). e.g. if you want to query into ImGuiStorage yourself
+    IMGUI_API ImGuiID       GetID(ImStrv str_id);                                           // calculate unique ID (hash of whole ID stack + given parameter). e.g. if you want to query into ImGuiStorage yourself
-    IMGUI_API ImGuiID       GetID(const char* str_id_begin, const char* str_id_end);
     IMGUI_API ImGuiID       GetID(const void* ptr_id);
 
     // Widgets: Text
-    IMGUI_API void          TextUnformatted(const char* text, const char* text_end = NULL); // raw text without formatting. Roughly equivalent to Text("%s", text) but: A) doesn't require null terminated string if 'text_end' is specified, B) it's faster, no memory copy is done, no buffer size limits, recommended for long chunks of text.
+    // FIXME-IMSTR: Functions taking format should use ImStrv. It breaks IM_FMTARGS() macro however.
+    IMGUI_API void          TextUnformatted(ImStrv text);                                   // raw text without formatting. Roughly equivalent to Text("%s", text) but: A) doesn't require null terminated string if 'text_end' is specified, B) it's faster, no memory copy is done, no buffer size limits, recommended for long chunks of text.
     IMGUI_API void          Text(const char* fmt, ...)                                      IM_FMTARGS(1); // formatted text
     IMGUI_API void          TextV(const char* fmt, va_list args)                            IM_FMTLIST(1);
     IMGUI_API void          TextColored(const ImVec4& col, const char* fmt, ...)            IM_FMTARGS(2); // shortcut for PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();
@@ -481,36 +501,36 @@ namespace ImGui
     IMGUI_API void          TextDisabledV(const char* fmt, va_list args)                    IM_FMTLIST(1);
     IMGUI_API void          TextWrapped(const char* fmt, ...)                               IM_FMTARGS(1); // shortcut for PushTextWrapPos(0.0f); Text(fmt, ...); PopTextWrapPos();. Note that this won't work on an auto-resizing window if there's no other widgets to extend the window width, yoy may need to set a size using SetNextWindowSize().
     IMGUI_API void          TextWrappedV(const char* fmt, va_list args)                     IM_FMTLIST(1);
-    IMGUI_API void          LabelText(const char* label, const char* fmt, ...)              IM_FMTARGS(2); // display text+label aligned the same way as value+label widgets
+    IMGUI_API void          LabelText(ImStrv label, const char* fmt, ...)                   IM_FMTARGS(2); // display text+label aligned the same way as value+label widgets
-    IMGUI_API void          LabelTextV(const char* label, const char* fmt, va_list args)    IM_FMTLIST(2);
+    IMGUI_API void          LabelTextV(ImStrv label, const char* fmt, va_list args)         IM_FMTLIST(2);
     IMGUI_API void          BulletText(const char* fmt, ...)                                IM_FMTARGS(1); // shortcut for Bullet()+Text()
     IMGUI_API void          BulletTextV(const char* fmt, va_list args)                      IM_FMTLIST(1);
 
     // Widgets: Main
     // - Most widgets return true when the value has been changed or when pressed/selected
     // - You may also use one of the many IsItemXXX functions (e.g. IsItemActive, IsItemHovered, etc.) to query widget state.
-    IMGUI_API bool          Button(const char* label, const ImVec2& size = ImVec2(0, 0));   // button
+    IMGUI_API bool          Button(ImStrv label, const ImVec2& size = ImVec2(0, 0));        // button
-    IMGUI_API bool          SmallButton(const char* label);                                 // button with FramePadding=(0,0) to easily embed within text
+    IMGUI_API bool          SmallButton(ImStrv label);                                      // button with FramePadding=(0,0) to easily embed within text
-    IMGUI_API bool          InvisibleButton(const char* str_id, const ImVec2& size, ImGuiButtonFlags flags = 0); // flexible button behavior without the visuals, frequently useful to build custom behaviors using the public api (along with IsItemActive, IsItemHovered, etc.)
+    IMGUI_API bool          InvisibleButton(ImStrv str_id, const ImVec2& size, ImGuiButtonFlags flags = 0); // flexible button behavior without the visuals, frequently useful to build custom behaviors using the public api (along with IsItemActive, IsItemHovered, etc.)
-    IMGUI_API bool          ArrowButton(const char* str_id, ImGuiDir dir);                  // square button with an arrow shape
+    IMGUI_API bool          ArrowButton(ImStrv str_id, ImGuiDir dir);                        // square button with an arrow shape
     IMGUI_API void          Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0, 0), const ImVec2& uv1 = ImVec2(1,1), const ImVec4& tint_col = ImVec4(1,1,1,1), const ImVec4& border_col = ImVec4(0,0,0,0));
     IMGUI_API bool          ImageButton(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0, 0),  const ImVec2& uv1 = ImVec2(1,1), int frame_padding = -1, const ImVec4& bg_col = ImVec4(0,0,0,0), const ImVec4& tint_col = ImVec4(1,1,1,1));    // <0 frame_padding uses default frame padding settings. 0 for no padding
-    IMGUI_API bool          Checkbox(const char* label, bool* v);
+    IMGUI_API bool          Checkbox(ImStrv label, bool* v);
-    IMGUI_API bool          CheckboxFlags(const char* label, int* flags, int flags_value);
+    IMGUI_API bool          CheckboxFlags(ImStrv label, int* flags, int flags_value);
-    IMGUI_API bool          CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
+    IMGUI_API bool          CheckboxFlags(ImStrv label, unsigned int* flags, unsigned int flags_value);
-    IMGUI_API bool          RadioButton(const char* label, bool active);                    // use with e.g. if (RadioButton("one", my_value==1)) { my_value = 1; }
+    IMGUI_API bool          RadioButton(ImStrv label, bool active);                         // use with e.g. if (RadioButton("one", my_value==1)) { my_value = 1; }
-    IMGUI_API bool          RadioButton(const char* label, int* v, int v_button);           // shortcut to handle the above pattern when value is an integer
+    IMGUI_API bool          RadioButton(ImStrv label, int* v, int v_button);                // shortcut to handle the above pattern when value is an integer
-    IMGUI_API void          ProgressBar(float fraction, const ImVec2& size_arg = ImVec2(-FLT_MIN, 0), const char* overlay = NULL);
+    IMGUI_API void          ProgressBar(float fraction, const ImVec2& size_arg = ImVec2(-FLT_MIN, 0), ImStrv overlay = ImStrv());
     IMGUI_API void          Bullet();                                                       // draw a small circle + keep the cursor on the same line. advance cursor x position by GetTreeNodeToLabelSpacing(), same distance that TreeNode() uses
 
     // Widgets: Combo Box
     // - The BeginCombo()/EndCombo() api allows you to manage your contents and selection state however you want it, by creating e.g. Selectable() items.
     // - The old Combo() api are helpers over BeginCombo()/EndCombo() which are kept available for convenience purpose. This is analogous to how ListBox are created.
-    IMGUI_API bool          BeginCombo(const char* label, const char* preview_value, ImGuiComboFlags flags = 0);
+    IMGUI_API bool          BeginCombo(ImStrv label, ImStrv preview_value, ImGuiComboFlags flags = 0);
     IMGUI_API void          EndCombo(); // only call EndCombo() if BeginCombo() returns true!
-    IMGUI_API bool          Combo(const char* label, int* current_item, const char* const items[], int items_count, int popup_max_height_in_items = -1);
+    IMGUI_API bool          Combo(ImStrv label, int* current_item, const char* const items[], int items_count, int popup_max_height_in_items = -1);
-    IMGUI_API bool          Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int popup_max_height_in_items = -1);      // Separate items with \0 within a string, end item-list with \0\0. e.g. "One\0Two\0Three\0"
+    IMGUI_API bool          Combo(ImStrv label, int* current_item, const char* items_separated_by_zeros, int popup_max_height_in_items = -1);      // Separate items with \0 within a string, end item-list with \0\0. e.g. "One\0Two\0Three\0"
-    IMGUI_API bool          Combo(const char* label, int* current_item, bool(*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int popup_max_height_in_items = -1);
+    IMGUI_API bool          Combo(ImStrv label, int* current_item, bool(*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int popup_max_height_in_items = -1);
 
     // Widgets: Drag Sliders
     // - CTRL+Click on any drag box to turn them into an input box. Manually input values aren't clamped by default and can go off-bounds. Use ImGuiSliderFlags_AlwaysClamp to always clamp.
@@ -524,18 +544,18 @@ namespace ImGui
     // - We use the same sets of flags for DragXXX() and SliderXXX() functions as the features are the same and it makes it easier to swap them.
     // - Legacy: Pre-1.78 there are DragXXX() function signatures that takes a final `float power=1.0f' argument instead of the `ImGuiSliderFlags flags=0' argument.
     //   If you get a warning converting a float to ImGuiSliderFlags, read https://github.com/ocornut/imgui/issues/3361
-    IMGUI_API bool          DragFloat(const char* label, float* v, float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, const char* format = "%.3f", ImGuiSliderFlags flags = 0);     // If v_min >= v_max we have no bound
+    IMGUI_API bool          DragFloat(ImStrv label, float* v, float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);     // If v_min >= v_max we have no bound
-    IMGUI_API bool          DragFloat2(const char* label, float v[2], float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragFloat2(ImStrv label, float v[2], float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragFloat3(const char* label, float v[3], float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragFloat3(ImStrv label, float v[3], float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragFloat4(const char* label, float v[4], float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragFloat4(ImStrv label, float v[4], float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragFloatRange2(const char* label, float* v_current_min, float* v_current_max, float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, const char* format = "%.3f", const char* format_max = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragFloatRange2(ImStrv label, float* v_current_min, float* v_current_max, float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, ImStrv format = "%.3f", ImStrv format_max = ImStrv(), ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragInt(const char* label, int* v, float v_speed = 1.0f, int v_min = 0, int v_max = 0, const char* format = "%d", ImGuiSliderFlags flags = 0);  // If v_min >= v_max we have no bound
+    IMGUI_API bool          DragInt(ImStrv label, int* v, float v_speed = 1.0f, int v_min = 0, int v_max = 0, ImStrv format = "%d", ImGuiSliderFlags flags = 0);  // If v_min >= v_max we have no bound
-    IMGUI_API bool          DragInt2(const char* label, int v[2], float v_speed = 1.0f, int v_min = 0, int v_max = 0, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragInt2(ImStrv label, int v[2], float v_speed = 1.0f, int v_min = 0, int v_max = 0, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragInt3(const char* label, int v[3], float v_speed = 1.0f, int v_min = 0, int v_max = 0, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragInt3(ImStrv label, int v[3], float v_speed = 1.0f, int v_min = 0, int v_max = 0, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragInt4(const char* label, int v[4], float v_speed = 1.0f, int v_min = 0, int v_max = 0, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragInt4(ImStrv label, int v[4], float v_speed = 1.0f, int v_min = 0, int v_max = 0, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragIntRange2(const char* label, int* v_current_min, int* v_current_max, float v_speed = 1.0f, int v_min = 0, int v_max = 0, const char* format = "%d", const char* format_max = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragIntRange2(ImStrv label, int* v_current_min, int* v_current_max, float v_speed = 1.0f, int v_min = 0, int v_max = 0, ImStrv format = "%d", ImStrv format_max = ImStrv(), ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragScalar(const char* label, ImGuiDataType data_type, void* p_data, float v_speed = 1.0f, const void* p_min = NULL, const void* p_max = NULL, const char* format = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragScalar(ImStrv label, ImGuiDataType data_type, void* p_data, float v_speed = 1.0f, const void* p_min = NULL, const void* p_max = NULL, ImStrv format = ImStrv(), ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          DragScalarN(const char* label, ImGuiDataType data_type, void* p_data, int components, float v_speed = 1.0f, const void* p_min = NULL, const void* p_max = NULL, const char* format = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          DragScalarN(ImStrv label, ImGuiDataType data_type, void* p_data, int components, float v_speed = 1.0f, const void* p_min = NULL, const void* p_max = NULL, ImStrv format = ImStrv(), ImGuiSliderFlags flags = 0);
 
     // Widgets: Regular Sliders
     // - CTRL+Click on any slider to turn them into an input box. Manually input values aren't clamped by default and can go off-bounds. Use ImGuiSliderFlags_AlwaysClamp to always clamp.
@@ -543,74 +563,75 @@ namespace ImGui
     // - Format string may also be set to NULL or use the default format ("%f" or "%d").
     // - Legacy: Pre-1.78 there are SliderXXX() function signatures that takes a final `float power=1.0f' argument instead of the `ImGuiSliderFlags flags=0' argument.
     //   If you get a warning converting a float to ImGuiSliderFlags, read https://github.com/ocornut/imgui/issues/3361
-    IMGUI_API bool          SliderFloat(const char* label, float* v, float v_min, float v_max, const char* format = "%.3f", ImGuiSliderFlags flags = 0);     // adjust format to decorate the value with a prefix or a suffix for in-slider labels or unit display.
+    IMGUI_API bool          SliderFloat(ImStrv label, float* v, float v_min, float v_max, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);     // adjust format to decorate the value with a prefix or a suffix for in-slider labels or unit display.
-    IMGUI_API bool          SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderFloat2(ImStrv label, float v[2], float v_min, float v_max, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderFloat3(ImStrv label, float v[3], float v_min, float v_max, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderFloat4(const char* label, float v[4], float v_min, float v_max, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderFloat4(ImStrv label, float v[4], float v_min, float v_max, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderAngle(const char* label, float* v_rad, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f, const char* format = "%.0f deg", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderAngle(ImStrv label, float* v_rad, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f, ImStrv format = "%.0f deg", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderInt(const char* label, int* v, int v_min, int v_max, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderInt(ImStrv label, int* v, int v_min, int v_max, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderInt2(const char* label, int v[2], int v_min, int v_max, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderInt2(ImStrv label, int v[2], int v_min, int v_max, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderInt3(const char* label, int v[3], int v_min, int v_max, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderInt3(ImStrv label, int v[3], int v_min, int v_max, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderInt4(const char* label, int v[4], int v_min, int v_max, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderInt4(ImStrv label, int v[4], int v_min, int v_max, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderScalar(const char* label, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, const char* format = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderScalar(ImStrv label, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, ImStrv format = ImStrv(), ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          SliderScalarN(const char* label, ImGuiDataType data_type, void* p_data, int components, const void* p_min, const void* p_max, const char* format = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          SliderScalarN(ImStrv label, ImGuiDataType data_type, void* p_data, int components, const void* p_min, const void* p_max, ImStrv format = ImStrv(), ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          VSliderFloat(const char* label, const ImVec2& size, float* v, float v_min, float v_max, const char* format = "%.3f", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          VSliderFloat(ImStrv label, const ImVec2& size, float* v, float v_min, float v_max, ImStrv format = "%.3f", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          VSliderInt(const char* label, const ImVec2& size, int* v, int v_min, int v_max, const char* format = "%d", ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          VSliderInt(ImStrv label, const ImVec2& size, int* v, int v_min, int v_max, ImStrv format = "%d", ImGuiSliderFlags flags = 0);
-    IMGUI_API bool          VSliderScalar(const char* label, const ImVec2& size, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, const char* format = NULL, ImGuiSliderFlags flags = 0);
+    IMGUI_API bool          VSliderScalar(ImStrv label, const ImVec2& size, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, ImStrv format = ImStrv(), ImGuiSliderFlags flags = 0);
 
     // Widgets: Input with Keyboard
     // - If you want to use InputText() with std::string or any custom dynamic string type, see misc/cpp/imgui_stdlib.h and comments in imgui_demo.cpp.
     // - Most of the ImGuiInputTextFlags flags are only useful for InputText() and not for InputFloatX, InputIntX, InputDouble etc.
-    IMGUI_API bool          InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
+    // - Format parameter is limited to 63 bytes.
-    IMGUI_API bool          InputTextMultiline(const char* label, char* buf, size_t buf_size, const ImVec2& size = ImVec2(0, 0), ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
+    IMGUI_API bool          InputText(ImStrv label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
-    IMGUI_API bool          InputTextWithHint(const char* label, const char* hint, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
+    IMGUI_API bool          InputTextMultiline(ImStrv label, char* buf, size_t buf_size, const ImVec2& size = ImVec2(0, 0), ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
-    IMGUI_API bool          InputFloat(const char* label, float* v, float step = 0.0f, float step_fast = 0.0f, const char* format = "%.3f", ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputTextWithHint(ImStrv label, ImStrv hint, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
-    IMGUI_API bool          InputFloat2(const char* label, float v[2], const char* format = "%.3f", ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputFloat(ImStrv label, float* v, float step = 0.0f, float step_fast = 0.0f, ImStrv format = "%.3f", ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputFloat3(const char* label, float v[3], const char* format = "%.3f", ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputFloat2(ImStrv label, float v[2], ImStrv format = "%.3f", ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputFloat4(const char* label, float v[4], const char* format = "%.3f", ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputFloat3(ImStrv label, float v[3], ImStrv format = "%.3f", ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputInt(const char* label, int* v, int step = 1, int step_fast = 100, ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputFloat4(ImStrv label, float v[4], ImStrv format = "%.3f", ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputInt2(const char* label, int v[2], ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputInt(ImStrv label, int* v, int step = 1, int step_fast = 100, ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputInt3(const char* label, int v[3], ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputInt2(ImStrv label, int v[2], ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputInt4(const char* label, int v[4], ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputInt3(ImStrv label, int v[3], ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputDouble(const char* label, double* v, double step = 0.0, double step_fast = 0.0, const char* format = "%.6f", ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputInt4(ImStrv label, int v[4], ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputScalar(const char* label, ImGuiDataType data_type, void* p_data, const void* p_step = NULL, const void* p_step_fast = NULL, const char* format = NULL, ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputDouble(ImStrv label, double* v, double step = 0.0, double step_fast = 0.0, ImStrv format = "%.6f", ImGuiInputTextFlags flags = 0);
-    IMGUI_API bool          InputScalarN(const char* label, ImGuiDataType data_type, void* p_data, int components, const void* p_step = NULL, const void* p_step_fast = NULL, const char* format = NULL, ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputScalar(ImStrv label, ImGuiDataType data_type, void* p_data, const void* p_step = NULL, const void* p_step_fast = NULL, ImStrv format = ImStrv(), ImGuiInputTextFlags flags = 0);
+    IMGUI_API bool          InputScalarN(ImStrv label, ImGuiDataType data_type, void* p_data, int components, const void* p_step = NULL, const void* p_step_fast = NULL, ImStrv format = ImStrv(), ImGuiInputTextFlags flags = 0);
 
     // Widgets: Color Editor/Picker (tip: the ColorEdit* functions have a little color square that can be left-clicked to open a picker, and right-clicked to open an option menu.)
     // - Note that in C++ a 'float v[X]' function argument is the _same_ as 'float* v', the array syntax is just a way to document the number of elements that are expected to be accessible.
     // - You can pass the address of a first float element out of a contiguous structure, e.g. &myvector.x
-    IMGUI_API bool          ColorEdit3(const char* label, float col[3], ImGuiColorEditFlags flags = 0);
+    IMGUI_API bool          ColorEdit3(ImStrv label, float col[3], ImGuiColorEditFlags flags = 0);
-    IMGUI_API bool          ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flags = 0);
+    IMGUI_API bool          ColorEdit4(ImStrv label, float col[4], ImGuiColorEditFlags flags = 0);
-    IMGUI_API bool          ColorPicker3(const char* label, float col[3], ImGuiColorEditFlags flags = 0);
+    IMGUI_API bool          ColorPicker3(ImStrv label, float col[3], ImGuiColorEditFlags flags = 0);
-    IMGUI_API bool          ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags flags = 0, const float* ref_col = NULL);
+    IMGUI_API bool          ColorPicker4(ImStrv label, float col[4], ImGuiColorEditFlags flags = 0, const float* ref_col = NULL);
-    IMGUI_API bool          ColorButton(const char* desc_id, const ImVec4& col, ImGuiColorEditFlags flags = 0, ImVec2 size = ImVec2(0, 0)); // display a color square/button, hover for details, return true when pressed.
+    IMGUI_API bool          ColorButton(ImStrv desc_id, const ImVec4& col, ImGuiColorEditFlags flags = 0, ImVec2 size = ImVec2(0, 0)); // display a color square/button, hover for details, return true when pressed.
     IMGUI_API void          SetColorEditOptions(ImGuiColorEditFlags flags);                     // initialize current options (generally on application startup) if you want to select a default format, picker type, etc. User will be able to change many settings, unless you pass the _NoOptions flag to your calls.
 
     // Widgets: Trees
     // - TreeNode functions return true when the node is open, in which case you need to also call TreePop() when you are finished displaying the tree node contents.
-    IMGUI_API bool          TreeNode(const char* label);
+    IMGUI_API bool          TreeNode(ImStrv label);
-    IMGUI_API bool          TreeNode(const char* str_id, const char* fmt, ...) IM_FMTARGS(2);   // helper variation to easily decorelate the id from the displayed string. Read the FAQ about why and how to use ID. to align arbitrary text at the same level as a TreeNode() you can use Bullet().
+    IMGUI_API bool          TreeNode(ImStrv str_id, const char* fmt, ...) IM_FMTARGS(2);        // helper variation to easily decorelate the id from the displayed string. Read the FAQ about why and how to use ID. to align arbitrary text at the same level as a TreeNode() you can use Bullet().
     IMGUI_API bool          TreeNode(const void* ptr_id, const char* fmt, ...) IM_FMTARGS(2);   // "
-    IMGUI_API bool          TreeNodeV(const char* str_id, const char* fmt, va_list args) IM_FMTLIST(2);
+    IMGUI_API bool          TreeNodeV(ImStrv str_id, const char* fmt, va_list args) IM_FMTLIST(2);
     IMGUI_API bool          TreeNodeV(const void* ptr_id, const char* fmt, va_list args) IM_FMTLIST(2);
-    IMGUI_API bool          TreeNodeEx(const char* label, ImGuiTreeNodeFlags flags = 0);
+    IMGUI_API bool          TreeNodeEx(ImStrv label, ImGuiTreeNodeFlags flags = 0);
-    IMGUI_API bool          TreeNodeEx(const char* str_id, ImGuiTreeNodeFlags flags, const char* fmt, ...) IM_FMTARGS(3);
+    IMGUI_API bool          TreeNodeEx(ImStrv str_id, ImGuiTreeNodeFlags flags, const char* fmt, ...) IM_FMTARGS(3);
     IMGUI_API bool          TreeNodeEx(const void* ptr_id, ImGuiTreeNodeFlags flags, const char* fmt, ...) IM_FMTARGS(3);
-    IMGUI_API bool          TreeNodeExV(const char* str_id, ImGuiTreeNodeFlags flags, const char* fmt, va_list args) IM_FMTLIST(3);
+    IMGUI_API bool          TreeNodeExV(ImStrv str_id, ImGuiTreeNodeFlags flags, const char* fmt, va_list args) IM_FMTLIST(3);
     IMGUI_API bool          TreeNodeExV(const void* ptr_id, ImGuiTreeNodeFlags flags, const char* fmt, va_list args) IM_FMTLIST(3);
-    IMGUI_API void          TreePush(const char* str_id);                                       // ~ Indent()+PushId(). Already called by TreeNode() when returning true, but you can call TreePush/TreePop yourself if desired.
+    IMGUI_API void          TreePush(ImStrv str_id);                                            // ~ Indent()+PushId(). Already called by TreeNode() when returning true, but you can call TreePush/TreePop yourself if desired.
     IMGUI_API void          TreePush(const void* ptr_id = NULL);                                // "
     IMGUI_API void          TreePop();                                                          // ~ Unindent()+PopId()
     IMGUI_API float         GetTreeNodeToLabelSpacing();                                        // horizontal distance preceding label when using TreeNode*() or Bullet() == (g.FontSize + style.FramePadding.x*2) for a regular unframed TreeNode
-    IMGUI_API bool          CollapsingHeader(const char* label, ImGuiTreeNodeFlags flags = 0);  // if returning 'true' the header is open. doesn't indent nor push on ID stack. user doesn't have to call TreePop().
+    IMGUI_API bool          CollapsingHeader(ImStrv label, ImGuiTreeNodeFlags flags = 0);       // if returning 'true' the header is open. doesn't indent nor push on ID stack. user doesn't have to call TreePop().
-    IMGUI_API bool          CollapsingHeader(const char* label, bool* p_visible, ImGuiTreeNodeFlags flags = 0); // when 'p_visible != NULL': if '*p_visible==true' display an additional small close button on upper right of the header which will set the bool to false when clicked, if '*p_visible==false' don't display the header.
+    IMGUI_API bool          CollapsingHeader(ImStrv label, bool* p_visible, ImGuiTreeNodeFlags flags = 0); // when 'p_visible != NULL': if '*p_visible==true' display an additional small close button on upper right of the header which will set the bool to false when clicked, if '*p_visible==false' don't display the header.
     IMGUI_API void          SetNextItemOpen(bool is_open, ImGuiCond cond = 0);                  // set next TreeNode/CollapsingHeader open state.
 
     // Widgets: Selectables
     // - A selectable highlights when hovered, and can display another color when selected.
     // - Neighbors selectable extend their highlight bounds in order to leave no gap between them. This is so a series of selected Selectable appear contiguous.
-    IMGUI_API bool          Selectable(const char* label, bool selected = false, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0, 0)); // "bool selected" carry the selection state (read-only). Selectable() is clicked is returns true so you can modify your selection state. size.x==0.0: use remaining width, size.x>0.0: specify width. size.y==0.0: use label height, size.y>0.0: specify height
+    IMGUI_API bool          Selectable(ImStrv label, bool selected = false, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0, 0));  // "bool selected" carry the selection state (read-only). Selectable() is clicked is returns true so you can modify your selection state. size.x==0.0: use remaining width, size.x>0.0: specify width. size.y==0.0: use label height, size.y>0.0: specify height
-    IMGUI_API bool          Selectable(const char* label, bool* p_selected, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0, 0));      // "bool* p_selected" point to the selection state (read-write), as a convenient helper.
+    IMGUI_API bool          Selectable(ImStrv label, bool* p_selected, ImGuiSelectableFlags flags = 0, const ImVec2& size = ImVec2(0, 0));       // "bool* p_selected" point to the selection state (read-write), as a convenient helper.
 
     // Widgets: List Boxes
     // - This is essentially a thin wrapper to using BeginChild/EndChild with some stylistic changes.
@@ -618,24 +639,24 @@ namespace ImGui
     // - The simplified/old ListBox() api are helpers over BeginListBox()/EndListBox() which are kept available for convenience purpose. This is analoguous to how Combos are created.
     // - Choose frame width:   size.x > 0.0f: custom  /  size.x < 0.0f or -FLT_MIN: right-align   /  size.x = 0.0f (default): use current ItemWidth
     // - Choose frame height:  size.y > 0.0f: custom  /  size.y < 0.0f or -FLT_MIN: bottom-align  /  size.y = 0.0f (default): arbitrary default height which can fit ~7 items
-    IMGUI_API bool          BeginListBox(const char* label, const ImVec2& size = ImVec2(0, 0)); // open a framed scrolling region
+    IMGUI_API bool          BeginListBox(ImStrv label, const ImVec2& size = ImVec2(0, 0)); // open a framed scrolling region
     IMGUI_API void          EndListBox();                                                       // only call EndListBox() if BeginListBox() returned true!
-    IMGUI_API bool          ListBox(const char* label, int* current_item, const char* const items[], int items_count, int height_in_items = -1);
+    IMGUI_API bool          ListBox(ImStrv label, int* current_item, const char* const items[], int items_count, int height_in_items = -1);
-    IMGUI_API bool          ListBox(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
+    IMGUI_API bool          ListBox(ImStrv label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int height_in_items = -1);
 
     // Widgets: Data Plotting
     // - Consider using ImPlot (https://github.com/epezent/implot) which is much better!
-    IMGUI_API void          PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0), int stride = sizeof(float));
+    IMGUI_API void          PlotLines(ImStrv label, const float* values, int values_count, int values_offset = 0, ImStrv overlay_text = ImStrv(), float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0), int stride = sizeof(float));
-    IMGUI_API void          PlotLines(const char* label, float(*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0));
+    IMGUI_API void          PlotLines(ImStrv label, float(*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, ImStrv overlay_text = ImStrv(), float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0));
-    IMGUI_API void          PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0), int stride = sizeof(float));
+    IMGUI_API void          PlotHistogram(ImStrv label, const float* values, int values_count, int values_offset = 0, ImStrv overlay_text = ImStrv(), float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0), int stride = sizeof(float));
-    IMGUI_API void          PlotHistogram(const char* label, float(*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0));
+    IMGUI_API void          PlotHistogram(ImStrv label, float(*values_getter)(void* data, int idx), void* data, int values_count, int values_offset = 0, ImStrv overlay_text = ImStrv(), float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0, 0));
 
     // Widgets: Value() Helpers.
     // - Those are merely shortcut to calling Text() with a format string. Output single value in "name: value" format (tip: freely declare more in your code to handle your types. you can add functions to the ImGui namespace)
-    IMGUI_API void          Value(const char* prefix, bool b);
+    IMGUI_API void          Value(ImStrv prefix, bool b);
-    IMGUI_API void          Value(const char* prefix, int v);
+    IMGUI_API void          Value(ImStrv prefix, int v);
-    IMGUI_API void          Value(const char* prefix, unsigned int v);
+    IMGUI_API void          Value(ImStrv prefix, unsigned int v);
-    IMGUI_API void          Value(const char* prefix, float v, const char* float_format = NULL);
+    IMGUI_API void          Value(ImStrv prefix, float v, ImStrv float_format = ImStrv());
 
     // Widgets: Menus
     // - Use BeginMenuBar() on a window ImGuiWindowFlags_MenuBar to append to its menu bar.
@@ -646,10 +667,10 @@ namespace ImGui
     IMGUI_API void          EndMenuBar();                                                       // only call EndMenuBar() if BeginMenuBar() returns true!
     IMGUI_API bool          BeginMainMenuBar();                                                 // create and append to a full screen menu-bar.
     IMGUI_API void          EndMainMenuBar();                                                   // only call EndMainMenuBar() if BeginMainMenuBar() returns true!
-    IMGUI_API bool          BeginMenu(const char* label, bool enabled = true);                  // create a sub-menu entry. only call EndMenu() if this returns true!
+    IMGUI_API bool          BeginMenu(ImStrv label, bool enabled = true);                       // create a sub-menu entry. only call EndMenu() if this returns true!
     IMGUI_API void          EndMenu();                                                          // only call EndMenu() if BeginMenu() returns true!
-    IMGUI_API bool          MenuItem(const char* label, const char* shortcut = NULL, bool selected = false, bool enabled = true);  // return true when activated.
+    IMGUI_API bool          MenuItem(ImStrv label, ImStrv shortcut = ImStrv(), bool selected = false, bool enabled = true); // return true when activated.
-    IMGUI_API bool          MenuItem(const char* label, const char* shortcut, bool* p_selected, bool enabled = true);              // return true when activated + toggle (*p_selected) if p_selected != NULL
+    IMGUI_API bool          MenuItem(ImStrv label, ImStrv shortcut, bool* p_selected, bool enabled = true);                 // return true when activated + toggle (*p_selected) if p_selected != NULL
 
     // Tooltips
     // - Tooltip are windows following the mouse. They do not take focus away.
@@ -670,8 +691,8 @@ namespace ImGui
     // Popups: begin/end functions
     //  - BeginPopup(): query popup state, if open start appending into the window. Call EndPopup() afterwards. ImGuiWindowFlags are forwarded to the window.
     //  - BeginPopupModal(): block every interactions behind the window, cannot be closed by user, add a dimming background, has a title bar.
-    IMGUI_API bool          BeginPopup(const char* str_id, ImGuiWindowFlags flags = 0);                         // return true if the popup is open, and you can start outputting to it.
+    IMGUI_API bool          BeginPopup(ImStrv str_id, ImGuiWindowFlags flags = 0);                              // return true if the popup is open, and you can start outputting to it.
-    IMGUI_API bool          BeginPopupModal(const char* name, bool* p_open = NULL, ImGuiWindowFlags flags = 0); // return true if the modal is open, and you can start outputting to it.
+    IMGUI_API bool          BeginPopupModal(ImStrv name, bool* p_open = NULL, ImGuiWindowFlags flags = 0);      // return true if the modal is open, and you can start outputting to it.
     IMGUI_API void          EndPopup();                                                                         // only call EndPopup() if BeginPopupXXX() returns true!
 
     // Popups: open/close functions
@@ -682,9 +703,9 @@ namespace ImGui
     //  - Use ImGuiPopupFlags_NoOpenOverExistingPopup to avoid opening a popup if there's already one at the same level. This is equivalent to e.g. testing for !IsAnyPopupOpen() prior to OpenPopup().
     //  - Use IsWindowAppearing() after BeginPopup() to tell if a window just opened.
     //  - IMPORTANT: Notice that for OpenPopupOnItemClick() we exceptionally default flags to 1 (== ImGuiPopupFlags_MouseButtonRight) for backward compatibility with older API taking 'int mouse_button = 1' parameter
-    IMGUI_API void          OpenPopup(const char* str_id, ImGuiPopupFlags popup_flags = 0);                     // call to mark popup as open (don't call every frame!).
+    IMGUI_API void          OpenPopup(ImStrv str_id, ImGuiPopupFlags popup_flags = 0);                          // call to mark popup as open (don't call every frame!).
     IMGUI_API void          OpenPopup(ImGuiID id, ImGuiPopupFlags popup_flags = 0);                             // id overload to facilitate calling from nested stacks
-    IMGUI_API void          OpenPopupOnItemClick(const char* str_id = NULL, ImGuiPopupFlags popup_flags = 1);   // helper to open popup when clicked on last item. Default to ImGuiPopupFlags_MouseButtonRight == 1. (note: actually triggers on the mouse _released_ event to be consistent with popup behaviors)
+    IMGUI_API void          OpenPopupOnItemClick(ImStrv str_id = ImStrv(), ImGuiPopupFlags popup_flags = 1);    // helper to open popup when clicked on last item. Default to ImGuiPopupFlags_MouseButtonRight == 1. (note: actually triggers on the mouse _released_ event to be consistent with popup behaviors)
     IMGUI_API void          CloseCurrentPopup();                                                                // manually close the popup we have begin-ed into.
 
     // Popups: open+begin combined functions helpers
@@ -692,15 +713,15 @@ namespace ImGui
     //  - They are convenient to easily create context menus, hence the name.
     //  - IMPORTANT: Notice that BeginPopupContextXXX takes ImGuiPopupFlags just like OpenPopup() and unlike BeginPopup(). For full consistency, we may add ImGuiWindowFlags to the BeginPopupContextXXX functions in the future.
     //  - IMPORTANT: Notice that we exceptionally default their flags to 1 (== ImGuiPopupFlags_MouseButtonRight) for backward compatibility with older API taking 'int mouse_button = 1' parameter, so if you add other flags remember to re-add the ImGuiPopupFlags_MouseButtonRight.
-    IMGUI_API bool          BeginPopupContextItem(const char* str_id = NULL, ImGuiPopupFlags popup_flags = 1);  // open+begin popup when clicked on last item. Use str_id==NULL to associate the popup to previous item. If you want to use that on a non-interactive item such as Text() you need to pass in an explicit ID here. read comments in .cpp!
+    IMGUI_API bool          BeginPopupContextItem(ImStrv str_id = ImStrv(), ImGuiPopupFlags popup_flags = 1);   // open+begin popup when clicked on last item. Use str_id==NULL to associate the popup to previous item. If you want to use that on a non-interactive item such as Text() you need to pass in an explicit ID here. read comments in .cpp!
-    IMGUI_API bool          BeginPopupContextWindow(const char* str_id = NULL, ImGuiPopupFlags popup_flags = 1);// open+begin popup when clicked on current window.
+    IMGUI_API bool          BeginPopupContextWindow(ImStrv str_id = ImStrv(), ImGuiPopupFlags popup_flags = 1); // open+begin popup when clicked on current window.
-    IMGUI_API bool          BeginPopupContextVoid(const char* str_id = NULL, ImGuiPopupFlags popup_flags = 1);  // open+begin popup when clicked in void (where there are no windows).
+    IMGUI_API bool          BeginPopupContextVoid(ImStrv str_id = ImStrv(), ImGuiPopupFlags popup_flags = 1);   // open+begin popup when clicked in void (where there are no windows).
 
     // Popups: query functions
     //  - IsPopupOpen(): return true if the popup is open at the current BeginPopup() level of the popup stack.
     //  - IsPopupOpen() with ImGuiPopupFlags_AnyPopupId: return true if any popup is open at the current BeginPopup() level of the popup stack.
     //  - IsPopupOpen() with ImGuiPopupFlags_AnyPopupId + ImGuiPopupFlags_AnyPopupLevel: return true if any popup is open.
-    IMGUI_API bool          IsPopupOpen(const char* str_id, ImGuiPopupFlags flags = 0);                         // return true if the popup is open.
+    IMGUI_API bool          IsPopupOpen(ImStrv str_id, ImGuiPopupFlags flags = 0);                              // return true if the popup is open.
 
     // Tables
     // - Full-featured replacement for old Columns API.
@@ -726,7 +747,7 @@ namespace ImGui
     //        TableNextRow()                           -> Text("Hello 0")                                               // Not OK! Missing TableSetColumnIndex() or TableNextColumn()! Text will not appear!
     //        --------------------------------------------------------------------------------------------------------
     // - 5. Call EndTable()
-    IMGUI_API bool          BeginTable(const char* str_id, int column, ImGuiTableFlags flags = 0, const ImVec2& outer_size = ImVec2(0.0f, 0.0f), float inner_width = 0.0f);
+    IMGUI_API bool          BeginTable(ImStrv str_id, int column, ImGuiTableFlags flags = 0, const ImVec2& outer_size = ImVec2(0.0f, 0.0f), float inner_width = 0.0f);
     IMGUI_API void          EndTable();                                 // only call EndTable() if BeginTable() returns true!
     IMGUI_API void          TableNextRow(ImGuiTableRowFlags row_flags = 0, float min_row_height = 0.0f); // append into the first cell of a new row.
     IMGUI_API bool          TableNextColumn();                          // append into the next column (or first column of next row if currently in last column). Return true when column is visible.
@@ -740,10 +761,10 @@ namespace ImGui
     // - You may manually submit headers using TableNextRow() + TableHeader() calls, but this is only useful in
     //   some advanced use cases (e.g. adding custom widgets in header row).
     // - Use TableSetupScrollFreeze() to lock columns/rows so they stay visible when scrolled.
-    IMGUI_API void          TableSetupColumn(const char* label, ImGuiTableColumnFlags flags = 0, float init_width_or_weight = 0.0f, ImGuiID user_id = 0);
+    IMGUI_API void          TableSetupColumn(ImStrv label, ImGuiTableColumnFlags flags = 0, float init_width_or_weight = 0.0f, ImGuiID user_id = 0);
     IMGUI_API void          TableSetupScrollFreeze(int cols, int rows); // lock columns/rows so they stay visible when scrolled.
     IMGUI_API void          TableHeadersRow();                          // submit all headers cells based on data provided to TableSetupColumn() + submit context menu
-    IMGUI_API void          TableHeader(const char* label);             // submit one header cell manually (rarely used)
+    IMGUI_API void          TableHeader(ImStrv label);                  // submit one header cell manually (rarely used)
 
     // Tables: Sorting
     // - Call TableGetSortSpecs() to retrieve latest sort specs for the table. NULL when not sorting.
@@ -765,7 +786,7 @@ namespace ImGui
 
     // Legacy Columns API (prefer using Tables!)
     // - You can also use SameLine(pos_x) to mimic simplified columns.
-    IMGUI_API void          Columns(int count = 1, const char* id = NULL, bool border = true);
+    IMGUI_API void          Columns(int count = 1, ImStrv id = ImStrv(), bool border = true);
     IMGUI_API void          NextColumn();                                                       // next column, defaults to current row or next row if the current row is finished
     IMGUI_API int           GetColumnIndex();                                                   // get current column index
     IMGUI_API float         GetColumnWidth(int column_index = -1);                              // get column width (in pixels). pass -1 to use current column
@@ -775,17 +796,17 @@ namespace ImGui
     IMGUI_API int           GetColumnsCount();
 
     // Tab Bars, Tabs
-    IMGUI_API bool          BeginTabBar(const char* str_id, ImGuiTabBarFlags flags = 0);        // create and append into a TabBar
+    IMGUI_API bool          BeginTabBar(ImStrv str_id, ImGuiTabBarFlags flags = 0);             // create and append into a TabBar
     IMGUI_API void          EndTabBar();                                                        // only call EndTabBar() if BeginTabBar() returns true!
-    IMGUI_API bool          BeginTabItem(const char* label, bool* p_open = NULL, ImGuiTabItemFlags flags = 0); // create a Tab. Returns true if the Tab is selected.
+    IMGUI_API bool          BeginTabItem(ImStrv label, bool* p_open = NULL, ImGuiTabItemFlags flags = 0);// create a Tab. Returns true if the Tab is selected.
     IMGUI_API void          EndTabItem();                                                       // only call EndTabItem() if BeginTabItem() returns true!
-    IMGUI_API bool          TabItemButton(const char* label, ImGuiTabItemFlags flags = 0);      // create a Tab behaving like a button. return true when clicked. cannot be selected in the tab bar.
+    IMGUI_API bool          TabItemButton(ImStrv label, ImGuiTabItemFlags flags = 0);           // create a Tab behaving like a button. return true when clicked. cannot be selected in the tab bar.
-    IMGUI_API void          SetTabItemClosed(const char* tab_or_docked_window_label);           // notify TabBar or Docking system of a closed tab/window ahead (useful to reduce visual flicker on reorderable tab bars). For tab-bar: call after BeginTabBar() and before Tab submissions. Otherwise call with a window name.
+    IMGUI_API void          SetTabItemClosed(ImStrv tab_or_docked_window_label);                // notify TabBar or Docking system of a closed tab/window ahead (useful to reduce visual flicker on reorderable tab bars). For tab-bar: call after BeginTabBar() and before Tab submissions. Otherwise call with a window name.
 
     // Logging/Capture
     // - All text output from the interface can be captured into tty/file/clipboard. By default, tree nodes are automatically opened during logging.
     IMGUI_API void          LogToTTY(int auto_open_depth = -1);                                 // start logging to tty (stdout)
-    IMGUI_API void          LogToFile(int auto_open_depth = -1, const char* filename = NULL);   // start logging to file
+    IMGUI_API void          LogToFile(int auto_open_depth = -1, ImStrv filename = ImStrv());    // start logging to file
     IMGUI_API void          LogToClipboard(int auto_open_depth = -1);                           // start logging to OS clipboard
     IMGUI_API void          LogFinish();                                                        // stop logging (close file, etc.)
     IMGUI_API void          LogButtons();                                                       // helper to display buttons for logging to tty/file/clipboard
@@ -798,10 +819,10 @@ namespace ImGui
     // - If you stop calling BeginDragDropSource() the payload is preserved however it won't have a preview tooltip (we currently display a fallback "..." tooltip, see #1725)
     // - An item can be both drag source and drop target.
     IMGUI_API bool          BeginDragDropSource(ImGuiDragDropFlags flags = 0);                                      // call after submitting an item which may be dragged. when this return true, you can call SetDragDropPayload() + EndDragDropSource()
-    IMGUI_API bool          SetDragDropPayload(const char* type, const void* data, size_t sz, ImGuiCond cond = 0);  // type is a user defined string of maximum 32 characters. Strings starting with '_' are reserved for dear imgui internal types. Data is copied and held by imgui. Return true when payload has been accepted.
+    IMGUI_API bool          SetDragDropPayload(ImStrv type, const void* data, size_t sz, ImGuiCond cond = 0);       // type is a user defined string of maximum 32 characters. Strings starting with '_' are reserved for dear imgui internal types. Data is copied and held by imgui. Return true when payload has been accepted.
     IMGUI_API void          EndDragDropSource();                                                                    // only call EndDragDropSource() if BeginDragDropSource() returns true!
     IMGUI_API bool                  BeginDragDropTarget();                                                          // call after submitting an item that may receive a payload. If this returns true, you can call AcceptDragDropPayload() + EndDragDropTarget()
-    IMGUI_API const ImGuiPayload*   AcceptDragDropPayload(const char* type, ImGuiDragDropFlags flags = 0);          // accept contents of a given type. If ImGuiDragDropFlags_AcceptBeforeDelivery is set you can peek into the payload before the mouse button is released.
+    IMGUI_API const ImGuiPayload*   AcceptDragDropPayload(ImStrv type, ImGuiDragDropFlags flags = 0);               // accept contents of a given type. If ImGuiDragDropFlags_AcceptBeforeDelivery is set you can peek into the payload before the mouse button is released.
     IMGUI_API void                  EndDragDropTarget();                                                            // only call EndDragDropTarget() if BeginDragDropTarget() returns true!
     IMGUI_API const ImGuiPayload*   GetDragDropPayload();                                                           // peek directly into the current payload from anywhere. may return NULL. use ImGuiPayload::IsDataType() to test for the payload type.
 
@@ -864,7 +885,7 @@ namespace ImGui
     IMGUI_API void          EndChildFrame();                                                    // always call EndChildFrame() regardless of BeginChildFrame() return values (which indicates a collapsed/clipped window)
 
     // Text Utilities
-    IMGUI_API ImVec2        CalcTextSize(const char* text, const char* text_end = NULL, bool hide_text_after_double_hash = false, float wrap_width = -1.0f);
+    IMGUI_API ImVec2        CalcTextSize(ImStrv text, bool hide_text_after_double_hash = false, float wrap_width = -1.0f);
 
     // Color Utilities
     IMGUI_API ImVec4        ColorConvertU32ToFloat4(ImU32 in);
@@ -909,20 +930,20 @@ namespace ImGui
     // Clipboard Utilities
     // - Also see the LogToClipboard() function to capture GUI into clipboard, or easily output text data to the clipboard.
     IMGUI_API const char*   GetClipboardText();
-    IMGUI_API void          SetClipboardText(const char* text);
+    IMGUI_API void          SetClipboardText(ImStrv text);
 
     // Settings/.Ini Utilities
     // - The disk functions are automatically called if io.IniFilename != NULL (default is "imgui.ini").
     // - Set io.IniFilename to NULL to load/save manually. Read io.WantSaveIniSettings description about handling .ini saving manually.
     // - Important: default value "imgui.ini" is relative to current working dir! Most apps will want to lock this to an absolute path (e.g. same path as executables).
-    IMGUI_API void          LoadIniSettingsFromDisk(const char* ini_filename);                  // call after CreateContext() and before the first call to NewFrame(). NewFrame() automatically calls LoadIniSettingsFromDisk(io.IniFilename).
+    IMGUI_API void          LoadIniSettingsFromDisk(ImStrv ini_filename);                       // call after CreateContext() and before the first call to NewFrame(). NewFrame() automatically calls LoadIniSettingsFromDisk(io.IniFilename).
-    IMGUI_API void          LoadIniSettingsFromMemory(const char* ini_data, size_t ini_size=0); // call after CreateContext() and before the first call to NewFrame() to provide .ini data from your own data source.
+    IMGUI_API void          LoadIniSettingsFromMemory(ImStrv ini_data);                         // call after CreateContext() and before the first call to NewFrame() to provide .ini data from your own data source.
-    IMGUI_API void          SaveIniSettingsToDisk(const char* ini_filename);                    // this is automatically called (if io.IniFilename is not empty) a few seconds after any modification that should be reflected in the .ini file (and also by DestroyContext).
+    IMGUI_API void          SaveIniSettingsToDisk(ImStrv ini_filename);                         // this is automatically called (if io.IniFilename is not empty) a few seconds after any modification that should be reflected in the .ini file (and also by DestroyContext).
     IMGUI_API const char*   SaveIniSettingsToMemory(size_t* out_ini_size = NULL);               // return a zero-terminated string with the .ini data which you can save by your own mean. call when io.WantSaveIniSettings is set, then save data by your own mean and clear io.WantSaveIniSettings.
 
     // Debug Utilities
     // - This is used by the IMGUI_CHECKVERSION() macro.
-    IMGUI_API bool          DebugCheckVersionAndDataLayout(const char* version_str, size_t sz_io, size_t sz_style, size_t sz_vec2, size_t sz_vec4, size_t sz_drawvert, size_t sz_drawidx); // This is called by IMGUI_CHECKVERSION() macro.
+    IMGUI_API bool          DebugCheckVersionAndDataLayout(ImStrv version_str, size_t sz_io, size_t sz_style, size_t sz_vec2, size_t sz_vec4, size_t sz_drawvert, size_t sz_drawidx);
 
     // Memory Allocators
     // - Those functions are not reliant on the current context.
@@ -1280,6 +1301,7 @@ enum ImGuiHoveredFlags_
     ImGuiHoveredFlags_AllowWhenBlockedByActiveItem  = 1 << 7,   // Return true even if an active item is blocking access to this item/window. Useful for Drag and Drop patterns.
     ImGuiHoveredFlags_AllowWhenOverlapped           = 1 << 8,   // IsItemHovered() only: Return true even if the position is obstructed or overlapped by another window
     ImGuiHoveredFlags_AllowWhenDisabled             = 1 << 9,   // IsItemHovered() only: Return true even if the item is disabled
+    ImGuiHoveredFlags_NoNavOverride                 = 1 << 10,  // Disable using gamepad/keyboard navigation state when active, always query mouse.
     ImGuiHoveredFlags_RectOnly                      = ImGuiHoveredFlags_AllowWhenBlockedByPopup | ImGuiHoveredFlags_AllowWhenBlockedByActiveItem | ImGuiHoveredFlags_AllowWhenOverlapped,
     ImGuiHoveredFlags_RootAndChildWindows           = ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows
 };
@@ -1421,7 +1443,7 @@ enum ImGuiKey_
     ImGuiKey_GamepadRStickLeft,     // [Analog]
     ImGuiKey_GamepadRStickRight,    // [Analog]
 
-    // Keyboard Modifiers
+    // Keyboard Modifiers (explicitly submitted by backend via AddKeyEvent() calls)
     // - This is mirroring the data also written to io.KeyCtrl, io.KeyShift, io.KeyAlt, io.KeySuper, in a format allowing
     //   them to be accessed via standard key API, allowing calls such as IsKeyPressed(), IsKeyReleased(), querying duration etc.
     // - Code polling every keys (e.g. an interface to detect a key press for input mapping) might want to ignore those
@@ -1429,11 +1451,9 @@ enum ImGuiKey_
     // - In theory the value of keyboard modifiers should be roughly equivalent to a logical or of the equivalent left/right keys.
     //   In practice: it's complicated; mods are often provided from different sources. Keyboard layout, IME, sticky keys and
     //   backends tend to interfere and break that equivalence. The safer decision is to relay that ambiguity down to the end-user...
-    ImGuiKey_ModCtrl,
+    ImGuiKey_ModCtrl, ImGuiKey_ModShift, ImGuiKey_ModAlt, ImGuiKey_ModSuper,
-    ImGuiKey_ModShift,
-    ImGuiKey_ModAlt,
-    ImGuiKey_ModSuper,
 
+    // End of list
     ImGuiKey_COUNT,                 // No valid ImGuiKey is ever greater than this value
 
     // [Internal] Prior to 1.87 we required user to fill io.KeysDown[512] using their own native index + a io.KeyMap[] array.
@@ -1815,7 +1835,7 @@ struct ImVector
     inline void         pop_back()                          { IM_ASSERT(Size > 0); Size--; }
     inline void         push_front(const T& v)              { if (Size == 0) push_back(v); else insert(Data, v); }
     inline T*           erase(const T* it)                  { IM_ASSERT(it >= Data && it < Data + Size); const ptrdiff_t off = it - Data; memmove(Data + off, Data + off + 1, ((size_t)Size - (size_t)off - 1) * sizeof(T)); Size--; return Data + off; }
-    inline T*           erase(const T* it, const T* it_last){ IM_ASSERT(it >= Data && it < Data + Size && it_last > it && it_last <= Data + Size); const ptrdiff_t count = it_last - it; const ptrdiff_t off = it - Data; memmove(Data + off, Data + off + count, ((size_t)Size - (size_t)off - (size_t)count) * sizeof(T)); Size -= (int)count; return Data + off; }
+    inline T*           erase(const T* it, const T* it_last){ IM_ASSERT(it >= Data && it < Data + Size && it_last >= it && it_last <= Data + Size); const ptrdiff_t count = it_last - it; const ptrdiff_t off = it - Data; memmove(Data + off, Data + off + count, ((size_t)Size - (size_t)off - (size_t)count) * sizeof(T)); Size -= (int)count; return Data + off; }
     inline T*           erase_unsorted(const T* it)         { IM_ASSERT(it >= Data && it < Data + Size);  const ptrdiff_t off = it - Data; if (it < Data + Size - 1) memcpy(Data + off, Data + Size - 1, sizeof(T)); Size--; return Data + off; }
     inline T*           insert(const T* it, const T& v)     { IM_ASSERT(it >= Data && it <= Data + Size); const ptrdiff_t off = it - Data; if (Size == Capacity) reserve(_grow_capacity(Size + 1)); if (off < (int)Size) memmove(Data + off + 1, Data + off, ((size_t)Size - (size_t)off) * sizeof(T)); memcpy(&Data[off], &v, sizeof(v)); Size++; return Data + off; }
     inline bool         contains(const T& v) const          { const T* data = Data;  const T* data_end = Data + Size; while (data < data_end) if (*data++ == v) return true; return false; }
@@ -1903,13 +1923,13 @@ struct ImGuiKeyData
 struct ImGuiIO
 {
     //------------------------------------------------------------------
-    // Configuration (fill once)                // Default value
+    // Configuration                            // Default value
     //------------------------------------------------------------------
 
     ImGuiConfigFlags   ConfigFlags;             // = 0              // See ImGuiConfigFlags_ enum. Set by user/application. Gamepad/keyboard navigation options, etc.
     ImGuiBackendFlags  BackendFlags;            // = 0              // See ImGuiBackendFlags_ enum. Set by backend (imgui_impl_xxx files or custom backend) to communicate features supported by the backend.
-    ImVec2      DisplaySize;                    // <unset>          // Main display size, in pixels (generally == GetMainViewport()->Size)
+    ImVec2      DisplaySize;                    // <unset>          // Main display size, in pixels (generally == GetMainViewport()->Size). May change every frame.
-    float       DeltaTime;                      // = 1.0f/60.0f     // Time elapsed since last frame, in seconds.
+    float       DeltaTime;                      // = 1.0f/60.0f     // Time elapsed since last frame, in seconds. May change every frame.
     float       IniSavingRate;                  // = 5.0f           // Minimum time between saving positions/sizes to .ini file, in seconds.
     const char* IniFilename;                    // = "imgui.ini"    // Path to .ini file (important: default "imgui.ini" is relative to current working dir!). Set NULL to disable automatic .ini loading/saving or if you want to manually call LoadIniSettingsXXX() / SaveIniSettingsXXX() functions.
     const char* LogFilename;                    // = "imgui_log.txt"// Path to .log file (default parameter to ImGui::LogToFile when no file is specified).
@@ -2007,7 +2027,7 @@ struct ImGuiIO
     // This is still temporarily supported as a legacy feature. However the new preferred scheme is for backend to call io.AddKeyEvent().
 #ifndef IMGUI_DISABLE_OBSOLETE_KEYIO
     int         KeyMap[ImGuiKey_COUNT];             // [LEGACY] Input: map of indices into the KeysDown[512] entries array which represent your "native" keyboard state. The first 512 are now unused and should be kept zero. Legacy backend will write into KeyMap[] using ImGuiKey_ indices which are always >512.
-    bool        KeysDown[512];                      // [LEGACY] Input: Keyboard keys that are pressed (ideally left in the "native" order your engine has access to keyboard keys, so you can use your own defines/enums for keys).
+    bool        KeysDown[ImGuiKey_COUNT];           // [LEGACY] Input: Keyboard keys that are pressed (ideally left in the "native" order your engine has access to keyboard keys, so you can use your own defines/enums for keys). This used to be [512] sized. It is now ImGuiKey_COUNT to allow legacy io.KeysDown[GetKeyIndex(...)] to work without an overflow.
 #endif
 
     //------------------------------------------------------------------
@@ -2029,7 +2049,6 @@ struct ImGuiIO
 
     // Other state maintained from data above + IO function calls
     ImGuiKeyModFlags KeyMods;                       // Key mods flags (same as io.KeyCtrl/KeyShift/KeyAlt/KeySuper but merged into flags), updated by NewFrame()
-    ImGuiKeyModFlags KeyModsPrev;                   // Key mods flags (from previous frame)
     ImGuiKeyData KeysData[ImGuiKey_KeysData_SIZE];  // Key state for all known keys. Use IsKeyXXX() functions to access this.
     bool        WantCaptureMouseUnlessPopupClose;   // Alternative to WantCaptureMouse: (WantCaptureMouse == true && WantCaptureMouseUnlessPopupClose == false) when a click over void is expected to close a popup.
     ImVec2      MousePosPrev;                       // Previous mouse position (note that MouseDelta is not necessary == MousePos-MousePosPrev, in case either position is invalid)
@@ -2041,7 +2060,7 @@ struct ImGuiIO
     ImU16       MouseClickedLastCount[5];           // Count successive number of clicks. Stays valid after mouse release. Reset after another click is done.
     bool        MouseReleased[5];                   // Mouse button went from Down to !Down
     bool        MouseDownOwned[5];                  // Track if button was clicked inside a dear imgui window or over void blocked by a popup. We don't request mouse capture from the application if click started outside ImGui bounds.
-    bool        MouseDownOwnedUnlessPopupClose[5];  //Track if button was clicked inside a dear imgui window.
+    bool        MouseDownOwnedUnlessPopupClose[5];  // Track if button was clicked inside a dear imgui window.
     float       MouseDownDuration[5];               // Duration the mouse button has been down (0.0f == just clicked)
     float       MouseDownDurationPrev[5];           // Previous time the mouse button has been down
     float       MouseDragMaxDistanceSqr[5];         // Squared maximum distance of how much mouse has traveled from the clicking point (used for moving thresholds)
@@ -2093,10 +2112,13 @@ struct ImGuiInputTextCallbackData
     // Use those function to benefit from the CallbackResize behaviors. Calling those function reset the selection.
     IMGUI_API ImGuiInputTextCallbackData();
     IMGUI_API void      DeleteChars(int pos, int bytes_count);
-    IMGUI_API void      InsertChars(int pos, const char* text, const char* text_end = NULL);
+    IMGUI_API void      InsertChars(int pos, ImStrv text);
     void                SelectAll()             { SelectionStart = 0; SelectionEnd = BufTextLen; }
     void                ClearSelection()        { SelectionStart = SelectionEnd = BufTextLen; }
     bool                HasSelection() const    { return SelectionStart != SelectionEnd; }
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    inline void         InsertChars(int pos, const char* text, const char* text_end) { InsertChars(pos, ImStrv(text, text_end)); }
+#endif
 };
 
 // Resizing callback data to apply custom constraint. As enabled by SetNextWindowSizeConstraints(). Callback is called during the next Begin().
@@ -2126,7 +2148,7 @@ struct ImGuiPayload
 
     ImGuiPayload()  { Clear(); }
     void Clear()    { SourceId = SourceParentId = 0; Data = NULL; DataSize = 0; memset(DataType, 0, sizeof(DataType)); DataFrameCount = -1; Preview = Delivery = false; }
-    bool IsDataType(const char* type) const { return DataFrameCount != -1 && strcmp(type, DataType) == 0; }
+    bool IsDataType(ImStrv type) const      { size_t len = type.length(); return DataFrameCount != -1 && memcmp(DataType, type.Begin, len) == 0 && DataType[len] == 0; }
     bool IsPreview() const                  { return Preview; }
     bool IsDelivery() const                 { return Delivery; }
 };
@@ -2179,27 +2201,23 @@ struct ImGuiOnceUponAFrame
 // Helper: Parse and apply text filters. In format "aaaaa[,bbbb][,ccccc]"
 struct ImGuiTextFilter
 {
-    IMGUI_API           ImGuiTextFilter(const char* default_filter = "");
+    // Private members
-    IMGUI_API bool      Draw(const char* label = "Filter (inc,-exc)", float width = 0.0f);  // Helper calling InputText+Build
+    char                InputBuf[256];
-    IMGUI_API bool      PassFilter(const char* text, const char* text_end = NULL) const;
+    ImVector<ImStrv>    Filters;
+    int                 CountGrep;
+
+    // Functions
+    IMGUI_API           ImGuiTextFilter(ImStrv default_filter = "");
+    IMGUI_API bool      Draw(ImStrv label = "Filter (inc,-exc)", float width = 0.0f);  // Helper calling InputText+Build
+    IMGUI_API bool      PassFilter(ImStrv text) const;
     IMGUI_API void      Build();
     void                Clear()          { InputBuf[0] = 0; Build(); }
     bool                IsActive() const { return !Filters.empty(); }
 
-    // [Internal]
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-    struct ImGuiTextRange
+    inline    bool      PassFilter(const char* text, const char* text_end = NULL) const { return PassFilter(ImStrv(text, text_end)); }
-    {
+#endif
-        const char*     b;
-        const char*     e;
 
-        ImGuiTextRange()                                { b = e = NULL; }
-        ImGuiTextRange(const char* _b, const char* _e)  { b = _b; e = _e; }
-        bool            empty() const                   { return b == e; }
-        IMGUI_API void  split(char separator, ImVector<ImGuiTextRange>* out) const;
-    };
-    char                    InputBuf[256];
-    ImVector<ImGuiTextRange>Filters;
-    int                     CountGrep;
 };
 
 // Helper: Growable text buffer for logging/accumulating text
@@ -2218,9 +2236,12 @@ struct ImGuiTextBuffer
     void                clear()                 { Buf.clear(); }
     void                reserve(int capacity)   { Buf.reserve(capacity); }
     const char*         c_str() const           { return Buf.Data ? Buf.Data : EmptyString; }
-    IMGUI_API void      append(const char* str, const char* str_end = NULL);
+    IMGUI_API void      append(ImStrv str);
     IMGUI_API void      appendf(const char* fmt, ...) IM_FMTARGS(2);
     IMGUI_API void      appendfv(const char* fmt, va_list args) IM_FMTLIST(2);
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    inline    void      append(const char* str, const char* str_end) { append(ImStrv(str, str_end)); }
+#endif
 };
 
 // Helper: Key->Value storage
@@ -2547,13 +2568,18 @@ struct ImDrawList
     IMGUI_API void  AddCircleFilled(const ImVec2& center, float radius, ImU32 col, int num_segments = 0);
     IMGUI_API void  AddNgon(const ImVec2& center, float radius, ImU32 col, int num_segments, float thickness = 1.0f);
     IMGUI_API void  AddNgonFilled(const ImVec2& center, float radius, ImU32 col, int num_segments);
-    IMGUI_API void  AddText(const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end = NULL);
+    IMGUI_API void  AddText(const ImVec2& pos, ImU32 col, ImStrv text);
-    IMGUI_API void  AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end = NULL, float wrap_width = 0.0f, const ImVec4* cpu_fine_clip_rect = NULL);
+    IMGUI_API void  AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, ImStrv text, float wrap_width = 0.0f, const ImVec4* cpu_fine_clip_rect = NULL);
     IMGUI_API void  AddPolyline(const ImVec2* points, int num_points, ImU32 col, ImDrawFlags flags, float thickness);
     IMGUI_API void  AddConvexPolyFilled(const ImVec2* points, int num_points, ImU32 col); // Note: Anti-aliased filling requires points to be in clockwise order.
     IMGUI_API void  AddBezierCubic(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, ImU32 col, float thickness, int num_segments = 0); // Cubic Bezier (4 control points)
     IMGUI_API void  AddBezierQuadratic(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, ImU32 col, float thickness, int num_segments = 0);               // Quadratic Bezier (3 control points)
 
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    inline    void  AddText(const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end) { AddText(NULL, 0.0f, pos, col, ImStrv(text_begin, text_end)); }
+    inline    void  AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end, float wrap_width = 0.0f, const ImVec4* cpu_fine_clip_rect = NULL) { AddText(font, font_size, pos, col, ImStrv(text_begin, text_end), wrap_width, cpu_fine_clip_rect); }
+#endif
+
     // Image primitives
     // - Read FAQ to understand what ImTextureID is.
     // - "p_min" and "p_max" represent the upper-left and lower-right corners of the rectangle.
@@ -2694,9 +2720,13 @@ struct ImFontGlyphRangesBuilder
     inline bool     GetBit(size_t n) const  { int off = (int)(n >> 5); ImU32 mask = 1u << (n & 31); return (UsedChars[off] & mask) != 0; }  // Get bit n in the array
     inline void     SetBit(size_t n)        { int off = (int)(n >> 5); ImU32 mask = 1u << (n & 31); UsedChars[off] |= mask; }               // Set bit n in the array
     inline void     AddChar(ImWchar c)      { SetBit(c); }                      // Add character
-    IMGUI_API void  AddText(const char* text, const char* text_end = NULL);     // Add string (each character of the UTF-8 string are added)
+    IMGUI_API void  AddText(ImStrv text);                                       // Add string (each character of the UTF-8 string are added)
     IMGUI_API void  AddRanges(const ImWchar* ranges);                           // Add ranges, e.g. builder.AddRanges(ImFontAtlas::GetGlyphRangesDefault()) to force add all of ASCII/Latin+Ext
     IMGUI_API void  BuildRanges(ImVector<ImWchar>* out_ranges);                 // Output new ranges
+
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    inline    void  AddText(const char* text, const char* text_end = NULL) { AddText(ImStrv(text, text_end)); }
+#endif
 };
 
 // See ImFontAtlas::AddCustomRectXXX functions.
@@ -2744,10 +2774,10 @@ struct ImFontAtlas
     IMGUI_API ~ImFontAtlas();
     IMGUI_API ImFont*           AddFont(const ImFontConfig* font_cfg);
     IMGUI_API ImFont*           AddFontDefault(const ImFontConfig* font_cfg = NULL);
-    IMGUI_API ImFont*           AddFontFromFileTTF(const char* filename, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL);
+    IMGUI_API ImFont*           AddFontFromFileTTF(ImStrv filename, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL);
     IMGUI_API ImFont*           AddFontFromMemoryTTF(void* font_data, int font_size, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // Note: Transfer ownership of 'ttf_data' to ImFontAtlas! Will be deleted after destruction of the atlas. Set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed.
     IMGUI_API ImFont*           AddFontFromMemoryCompressedTTF(const void* compressed_font_data, int compressed_font_size, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
-    IMGUI_API ImFont*           AddFontFromMemoryCompressedBase85TTF(const char* compressed_font_data_base85, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL);              // 'compressed_font_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 parameter.
+    IMGUI_API ImFont*           AddFontFromMemoryCompressedBase85TTF(ImStrv compressed_font_data_base85, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL);                    // 'compressed_font_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 parameter.
     IMGUI_API void              ClearInputData();           // Clear input data (all ImFontConfig structures including sizes, TTF data, glyph ranges, etc.) = all the data used to build the texture and fonts.
     IMGUI_API void              ClearTexData();             // Clear output texture data (CPU side). Saves RAM once the texture has been copied to graphics memory.
     IMGUI_API void              ClearFonts();               // Clear output font data (glyphs storage, UV coordinates).
@@ -2875,10 +2905,16 @@ struct ImFont
 
     // 'max_width' stops rendering after a certain width (could be turned into a 2d size). FLT_MAX to disable.
     // 'wrap_width' enable automatic word-wrapping across multiple lines to fit into given width. 0.0f to disable.
-    IMGUI_API ImVec2            CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end = NULL, const char** remaining = NULL) const; // utf8
+    IMGUI_API ImVec2            CalcTextSizeA(float size, float max_width, float wrap_width, ImStrv text, const char** remaining = NULL) const; // utf8
-    IMGUI_API const char*       CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const;
+    IMGUI_API const char*       CalcWordWrapPositionA(float scale, ImStrv text, float wrap_width) const;
     IMGUI_API void              RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, ImWchar c) const;
-    IMGUI_API void              RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, float wrap_width = 0.0f, bool cpu_fine_clip = false) const;
+    IMGUI_API void              RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, ImStrv text, float wrap_width = 0.0f, bool cpu_fine_clip = false) const;
+
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    inline    ImVec2            CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end, const char** remaining = NULL) const { return CalcTextSizeA(size, max_width, wrap_width, ImStrv(text_begin, text_end), remaining); }
+    inline    const char*       CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const                                              { return CalcWordWrapPositionA(scale, ImStrv(text, text_end), wrap_width); }
+    inline    void              RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, float wrap_width = 0.0f, bool cpu_fine_clip = false) const { RenderText(draw_list, size, pos, col, clip_rect, ImStrv(text_begin, text_end), wrap_width, cpu_fine_clip); }
+#endif
 
     // [Internal] Don't use!
     IMGUI_API void              BuildLookupTable();
@@ -2960,33 +2996,39 @@ namespace ImGui
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
 namespace ImGui
 {
+    // OBSOLETED in 1.XX (string_view branch)
+    inline void         PushID(const char* str_id_begin, const char* str_id_end)    { PushID(ImStrv(str_id_begin, str_id_end)); }
+    inline ImGuiID      GetID(const char* str_id_begin, const char* str_id_end)     { return GetID(ImStrv(str_id_begin, str_id_end)); }
+    inline void         TextUnformatted(const char* text, const char* text_end)     { TextUnformatted(ImStrv(text, text_end)); }
+    inline ImVec2       CalcTextSize(const char* text, const char* text_end, bool hide_text_after_double_hash = false, float wrap_width = -1.0f) { return CalcTextSize(ImStrv(text, text_end), hide_text_after_double_hash, wrap_width); }
+
     // OBSOLETED in 1.86 (from November 2021)
     IMGUI_API void      CalcListClipping(int items_count, float items_height, int* out_items_display_start, int* out_items_display_end); // Calculate coarse clipping for large list of evenly sized items. Prefer using ImGuiListClipper.
     // OBSOLETED in 1.85 (from August 2021)
     static inline float GetWindowContentRegionWidth() { return GetWindowContentRegionMax().x - GetWindowContentRegionMin().x; }
     // OBSOLETED in 1.81 (from February 2021)
-    IMGUI_API bool      ListBoxHeader(const char* label, int items_count, int height_in_items = -1); // Helper to calculate size from items_count and height_in_items
+    IMGUI_API bool      ListBoxHeader(ImStrv label, int items_count, int height_in_items = -1); // Helper to calculate size from items_count and height_in_items
-    static inline bool  ListBoxHeader(const char* label, const ImVec2& size = ImVec2(0, 0)) { return BeginListBox(label, size); }
+    static inline bool  ListBoxHeader(ImStrv label, const ImVec2& size = ImVec2(0, 0)) { return BeginListBox(label, size); }
     static inline void  ListBoxFooter() { EndListBox(); }
     // OBSOLETED in 1.79 (from August 2020)
-    static inline void  OpenPopupContextItem(const char* str_id = NULL, ImGuiMouseButton mb = 1) { OpenPopupOnItemClick(str_id, mb); } // Bool return value removed. Use IsWindowAppearing() in BeginPopup() instead. Renamed in 1.77, renamed back in 1.79. Sorry!
+    static inline void  OpenPopupContextItem(ImStrv str_id = ImStrv(), ImGuiMouseButton mb = 1) { OpenPopupOnItemClick(str_id, mb); } // Bool return value removed. Use IsWindowAppearing() in BeginPopup() instead. Renamed in 1.77, renamed back in 1.79. Sorry!
     // OBSOLETED in 1.78 (from June 2020)
     // Old drag/sliders functions that took a 'float power = 1.0' argument instead of flags.
     // For shared code, you can version check at compile-time with `#if IMGUI_VERSION_NUM >= 17704`.
-    IMGUI_API bool      DragScalar(const char* label, ImGuiDataType data_type, void* p_data, float v_speed, const void* p_min, const void* p_max, const char* format, float power);
+    IMGUI_API bool      DragScalar(ImStrv label, ImGuiDataType data_type, void* p_data, float v_speed, const void* p_min, const void* p_max, ImStrv format, float power);
-    IMGUI_API bool      DragScalarN(const char* label, ImGuiDataType data_type, void* p_data, int components, float v_speed, const void* p_min, const void* p_max, const char* format, float power);
+    IMGUI_API bool      DragScalarN(ImStrv label, ImGuiDataType data_type, void* p_data, int components, float v_speed, const void* p_min, const void* p_max, ImStrv format, float power);
-    static inline bool  DragFloat(const char* label, float* v, float v_speed, float v_min, float v_max, const char* format, float power)    { return DragScalar(label, ImGuiDataType_Float, v, v_speed, &v_min, &v_max, format, power); }
+    static inline bool  DragFloat(ImStrv label, float* v, float v_speed, float v_min, float v_max, ImStrv format, float power)    { return DragScalar(label, ImGuiDataType_Float, v, v_speed, &v_min, &v_max, format, power); }
-    static inline bool  DragFloat2(const char* label, float v[2], float v_speed, float v_min, float v_max, const char* format, float power) { return DragScalarN(label, ImGuiDataType_Float, v, 2, v_speed, &v_min, &v_max, format, power); }
+    static inline bool  DragFloat2(ImStrv label, float v[2], float v_speed, float v_min, float v_max, ImStrv format, float power) { return DragScalarN(label, ImGuiDataType_Float, v, 2, v_speed, &v_min, &v_max, format, power); }
-    static inline bool  DragFloat3(const char* label, float v[3], float v_speed, float v_min, float v_max, const char* format, float power) { return DragScalarN(label, ImGuiDataType_Float, v, 3, v_speed, &v_min, &v_max, format, power); }
+    static inline bool  DragFloat3(ImStrv label, float v[3], float v_speed, float v_min, float v_max, ImStrv format, float power) { return DragScalarN(label, ImGuiDataType_Float, v, 3, v_speed, &v_min, &v_max, format, power); }
-    static inline bool  DragFloat4(const char* label, float v[4], float v_speed, float v_min, float v_max, const char* format, float power) { return DragScalarN(label, ImGuiDataType_Float, v, 4, v_speed, &v_min, &v_max, format, power); }
+    static inline bool  DragFloat4(ImStrv label, float v[4], float v_speed, float v_min, float v_max, ImStrv format, float power) { return DragScalarN(label, ImGuiDataType_Float, v, 4, v_speed, &v_min, &v_max, format, power); }
-    IMGUI_API bool      SliderScalar(const char* label, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, const char* format, float power);
+    IMGUI_API bool      SliderScalar(ImStrv label, ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max, ImStrv format, float power);
-    IMGUI_API bool      SliderScalarN(const char* label, ImGuiDataType data_type, void* p_data, int components, const void* p_min, const void* p_max, const char* format, float power);
+    IMGUI_API bool      SliderScalarN(ImStrv label, ImGuiDataType data_type, void* p_data, int components, const void* p_min, const void* p_max, ImStrv format, float power);
-    static inline bool  SliderFloat(const char* label, float* v, float v_min, float v_max, const char* format, float power)                 { return SliderScalar(label, ImGuiDataType_Float, v, &v_min, &v_max, format, power); }
+    static inline bool  SliderFloat(ImStrv label, float* v, float v_min, float v_max, ImStrv format, float power)                 { return SliderScalar(label, ImGuiDataType_Float, v, &v_min, &v_max, format, power); }
-    static inline bool  SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* format, float power)              { return SliderScalarN(label, ImGuiDataType_Float, v, 2, &v_min, &v_max, format, power); }
+    static inline bool  SliderFloat2(ImStrv label, float v[2], float v_min, float v_max, ImStrv format, float power)              { return SliderScalarN(label, ImGuiDataType_Float, v, 2, &v_min, &v_max, format, power); }
-    static inline bool  SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* format, float power)              { return SliderScalarN(label, ImGuiDataType_Float, v, 3, &v_min, &v_max, format, power); }
+    static inline bool  SliderFloat3(ImStrv label, float v[3], float v_min, float v_max, ImStrv format, float power)              { return SliderScalarN(label, ImGuiDataType_Float, v, 3, &v_min, &v_max, format, power); }
-    static inline bool  SliderFloat4(const char* label, float v[4], float v_min, float v_max, const char* format, float power)              { return SliderScalarN(label, ImGuiDataType_Float, v, 4, &v_min, &v_max, format, power); }
+    static inline bool  SliderFloat4(ImStrv label, float v[4], float v_min, float v_max, ImStrv format, float power)              { return SliderScalarN(label, ImGuiDataType_Float, v, 4, &v_min, &v_max, format, power); }
     // OBSOLETED in 1.77 (from June 2020)
-    static inline bool  BeginPopupContextWindow(const char* str_id, ImGuiMouseButton mb, bool over_items) { return BeginPopupContextWindow(str_id, mb | (over_items ? 0 : ImGuiPopupFlags_NoOpenOverItems)); }
+    static inline bool  BeginPopupContextWindow(ImStrv str_id, ImGuiMouseButton mb, bool over_items) { return BeginPopupContextWindow(str_id, mb | (over_items ? 0 : ImGuiPopupFlags_NoOpenOverItems)); }
 
     // Some of the older obsolete names along with their replacement (commented out so they are not reported in IDE)
     //static inline void  TreeAdvanceToLabelPos()               { SetCursorPosX(GetCursorPosX() + GetTreeNodeToLabelSpacing()); }   // OBSOLETED in 1.72 (from July 2019)

imgui_demo.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.87
+// dear imgui, v1.88 WIP
 // (demo code)
 
 // Help:
@@ -3240,7 +3240,7 @@ static void ShowDemoWindowLayout()
                     "(this is often used internally to avoid altering the clipping rectangle and minimize draw calls)");
                 ImVec4 clip_rect(p0.x, p0.y, p1.x, p1.y); // AddText() takes a ImVec4* here so let's convert.
                 draw_list->AddRectFilled(p0, p1, IM_COL32(90, 90, 120, 255));
-                draw_list->AddText(ImGui::GetFont(), ImGui::GetFontSize(), text_pos, IM_COL32_WHITE, text_str, NULL, 0.0f, &clip_rect);
+                draw_list->AddText(ImGui::GetFont(), ImGui::GetFontSize(), text_pos, IM_COL32_WHITE, text_str, 0.0f, &clip_rect);
                 break;
             }
             ImGui::EndGroup();
@@ -5666,12 +5666,18 @@ static void ShowDemoWindowMisc()
         ImGuiIO& io = ImGui::GetIO();
 
         // Display ImGuiIO output flags
-        ImGui::Text("WantCaptureMouse: %d", io.WantCaptureMouse);
+        IMGUI_DEMO_MARKER("Inputs, Navigation & Focus/Output");
-        ImGui::Text("WantCaptureMouseUnlessPopupClose: %d", io.WantCaptureMouseUnlessPopupClose);
+        ImGui::SetNextItemOpen(true, ImGuiCond_Once);
-        ImGui::Text("WantCaptureKeyboard: %d", io.WantCaptureKeyboard);
+        if (ImGui::TreeNode("Output"))
-        ImGui::Text("WantTextInput: %d", io.WantTextInput);
+        {
-        ImGui::Text("WantSetMousePos: %d", io.WantSetMousePos);
+            ImGui::Text("io.WantCaptureMouse: %d", io.WantCaptureMouse);
-        ImGui::Text("NavActive: %d, NavVisible: %d", io.NavActive, io.NavVisible);
+            ImGui::Text("io.WantCaptureMouseUnlessPopupClose: %d", io.WantCaptureMouseUnlessPopupClose);
+            ImGui::Text("io.WantCaptureKeyboard: %d", io.WantCaptureKeyboard);
+            ImGui::Text("io.WantTextInput: %d", io.WantTextInput);
+            ImGui::Text("io.WantSetMousePos: %d", io.WantSetMousePos);
+            ImGui::Text("io.NavActive: %d, io.NavVisible: %d", io.NavActive, io.NavVisible);
+            ImGui::TreePop();
+        }
 
         // Display Mouse state
         IMGUI_DEMO_MARKER("Inputs, Navigation & Focus/Mouse State");
@@ -5704,6 +5710,7 @@ static void ShowDemoWindowMisc()
 #else
             struct funcs { static bool IsLegacyNativeDupe(ImGuiKey key) { return key < 512 && ImGui::GetIO().KeyMap[key] != -1; } }; // Hide Native<>ImGuiKey duplicates when both exists in the array
             const ImGuiKey key_first = 0;
+            //ImGui::Text("Legacy raw:");       for (ImGuiKey key = key_first; key < ImGuiKey_COUNT; key++) { if (io.KeysDown[key]) { ImGui::SameLine(); ImGui::Text("\"%s\" %d", ImGui::GetKeyName(key), key); } }
 #endif
             ImGui::Text("Keys down:");          for (ImGuiKey key = key_first; key < ImGuiKey_COUNT; key++) { if (funcs::IsLegacyNativeDupe(key)) continue; if (ImGui::IsKeyDown(key)) { ImGui::SameLine(); ImGui::Text("\"%s\" %d (%.02f secs)", ImGui::GetKeyName(key), key, ImGui::GetKeyData(key)->DownDuration); } }
             ImGui::Text("Keys pressed:");       for (ImGuiKey key = key_first; key < ImGuiKey_COUNT; key++) { if (funcs::IsLegacyNativeDupe(key)) continue; if (ImGui::IsKeyPressed(key)) { ImGui::SameLine(); ImGui::Text("\"%s\" %d", ImGui::GetKeyName(key), key); } }
@@ -6043,7 +6050,7 @@ namespace ImGui { IMGUI_API void ShowFontAtlas(ImFontAtlas* atlas); }
 
 // Demo helper function to select among loaded fonts.
 // Here we use the regular BeginCombo()/EndCombo() api which is the more flexible one.
-void ImGui::ShowFontSelector(const char* label)
+void ImGui::ShowFontSelector(ImStrv label)
 {
     ImGuiIO& io = ImGui::GetIO();
     ImFont* font_current = ImGui::GetFont();
@@ -6070,7 +6077,7 @@ void ImGui::ShowFontSelector(const char* label)
 // Demo helper function to select among default colors. See ShowStyleEditor() for more advanced options.
 // Here we use the simplified Combo() api that packs items into a single literal string.
 // Useful for quick combo boxes where the choices are known locally.
-bool ImGui::ShowStyleSelector(const char* label)
+bool ImGui::ShowStyleSelector(ImStrv label)
 {
     static int style_idx = -1;
     if (ImGui::Combo(label, &style_idx, "Dark\0Light\0Classic\0"))
@@ -6761,7 +6768,7 @@ struct ExampleAppConsole
                     if (match_len > 0)
                     {
                         data->DeleteChars((int)(word_start - data->Buf), (int)(word_end - word_start));
-                        data->InsertChars(data->CursorPos, candidates[0], candidates[0] + match_len);
+                        data->InsertChars(data->CursorPos, ImStrv(candidates[0], candidates[0] + match_len));
                     }
 
                     // List matches
@@ -6895,8 +6902,8 @@ struct ExampleAppLog
             {
                 const char* line_start = buf + LineOffsets[line_no];
                 const char* line_end = (line_no + 1 < LineOffsets.Size) ? (buf + LineOffsets[line_no + 1] - 1) : buf_end;
-                if (Filter.PassFilter(line_start, line_end))
+                if (Filter.PassFilter(ImStrv(line_start, line_end)))
-                    ImGui::TextUnformatted(line_start, line_end);
+                    ImGui::TextUnformatted(ImStrv(line_start, line_end));
             }
         }
         else
@@ -6922,7 +6929,7 @@ struct ExampleAppLog
                 {
                     const char* line_start = buf + LineOffsets[line_no];
                     const char* line_end = (line_no + 1 < LineOffsets.Size) ? (buf + LineOffsets[line_no + 1] - 1) : buf_end;
-                    ImGui::TextUnformatted(line_start, line_end);
+                    ImGui::TextUnformatted(ImStrv(line_start, line_end));
                 }
             }
             clipper.End();
@@ -7155,7 +7162,7 @@ static void ShowExampleAppLongText(bool* p_open)
     {
     case 0:
         // Single call to TextUnformatted() with a big buffer
-        ImGui::TextUnformatted(log.begin(), log.end());
+        ImGui::TextUnformatted(ImStrv(log.begin(), log.end()));
         break;
     case 1:
         {

imgui_draw.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.87
+// dear imgui, v1.88 WIP
 // (drawing and font code)
 
 /*
@@ -1206,8 +1206,8 @@ void ImDrawList::PathArcTo(const ImVec2& center, float radius, float a_min, floa
 
         const float a_min_segment_angle = a_min_sample * IM_PI * 2.0f / IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
         const float a_max_segment_angle = a_max_sample * IM_PI * 2.0f / IM_DRAWLIST_ARCFAST_SAMPLE_MAX;
-        const bool a_emit_start = (a_min_segment_angle - a_min) != 0.0f;
+        const bool a_emit_start = ImAbs(a_min_segment_angle - a_min) >= 1e-5f;
-        const bool a_emit_end = (a_max - a_max_segment_angle) != 0.0f;
+        const bool a_emit_end = ImAbs(a_max - a_max_segment_angle) >= 1e-5f;
 
         _Path.reserve(_Path.Size + (a_mid_samples + 1 + (a_emit_start ? 1 : 0) + (a_emit_end ? 1 : 0)));
         if (a_emit_start)
@@ -1573,14 +1573,11 @@ void ImDrawList::AddBezierQuadratic(const ImVec2& p1, const ImVec2& p2, const Im
     PathStroke(col, 0, thickness);
 }
 
-void ImDrawList::AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end, float wrap_width, const ImVec4* cpu_fine_clip_rect)
+void ImDrawList::AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, ImStrv text, float wrap_width, const ImVec4* cpu_fine_clip_rect)
 {
     if ((col & IM_COL32_A_MASK) == 0)
         return;
-
+    if (text.Begin == text.End)
-    if (text_end == NULL)
-        text_end = text_begin + strlen(text_begin);
-    if (text_begin == text_end)
         return;
 
     // Pull default font/size from the shared ImDrawListSharedData instance
@@ -1599,12 +1596,12 @@ void ImDrawList::AddText(const ImFont* font, float font_size, const ImVec2& pos,
         clip_rect.z = ImMin(clip_rect.z, cpu_fine_clip_rect->z);
         clip_rect.w = ImMin(clip_rect.w, cpu_fine_clip_rect->w);
     }
-    font->RenderText(this, font_size, pos, col, clip_rect, text_begin, text_end, wrap_width, cpu_fine_clip_rect != NULL);
+    font->RenderText(this, font_size, pos, col, clip_rect, text, wrap_width, cpu_fine_clip_rect != NULL);
 }
 
-void ImDrawList::AddText(const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end)
+void ImDrawList::AddText(const ImVec2& pos, ImU32 col, ImStrv text)
 {
-    AddText(NULL, 0.0f, pos, col, text_begin, text_end);
+    AddText(NULL, 0.0f, pos, col, text);
 }
 
 void ImDrawList::AddImage(ImTextureID user_texture_id, const ImVec2& p_min, const ImVec2& p_max, const ImVec2& uv_min, const ImVec2& uv_max, ImU32 col)
@@ -2108,13 +2105,15 @@ static unsigned int stb_decompress_length(const unsigned char* input);
 static unsigned int stb_decompress(unsigned char* output, const unsigned char* input, unsigned int length);
 static const char*  GetDefaultCompressedFontDataTTFBase85();
 static unsigned int Decode85Byte(char c)                                    { return c >= '\\' ? c-36 : c-35; }
-static void         Decode85(const unsigned char* src, unsigned char* dst)
+static void         Decode85(ImStrv src, unsigned char* dst)
 {
-    while (*src)
+    const char* p = src.Begin;
+    const char* p_end = src.End;
+    while (p < p_end)
     {
-        unsigned int tmp = Decode85Byte(src[0]) + 85 * (Decode85Byte(src[1]) + 85 * (Decode85Byte(src[2]) + 85 * (Decode85Byte(src[3]) + 85 * Decode85Byte(src[4]))));
+        unsigned int tmp = Decode85Byte(p[0]) + 85 * (Decode85Byte(p[1]) + 85 * (Decode85Byte(p[2]) + 85 * (Decode85Byte(p[3]) + 85 * Decode85Byte(p[4]))));
         dst[0] = ((tmp >> 0) & 0xFF); dst[1] = ((tmp >> 8) & 0xFF); dst[2] = ((tmp >> 16) & 0xFF); dst[3] = ((tmp >> 24) & 0xFF);   // We can't assume little-endianness.
-        src += 5;
+        p += 5;
         dst += 4;
     }
 }
@@ -2141,7 +2140,7 @@ ImFont* ImFontAtlas::AddFontDefault(const ImFontConfig* font_cfg_template)
     return font;
 }
 
-ImFont* ImFontAtlas::AddFontFromFileTTF(const char* filename, float size_pixels, const ImFontConfig* font_cfg_template, const ImWchar* glyph_ranges)
+ImFont* ImFontAtlas::AddFontFromFileTTF(ImStrv filename, float size_pixels, const ImFontConfig* font_cfg_template, const ImWchar* glyph_ranges)
 {
     IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas between NewFrame() and EndFrame/Render()!");
     size_t data_size = 0;
@@ -2156,8 +2155,9 @@ ImFont* ImFontAtlas::AddFontFromFileTTF(const char* filename, float size_pixels,
     {
         // Store a short copy of filename into into the font name for convenience
         const char* p;
-        for (p = filename + strlen(filename); p > filename && p[-1] != '/' && p[-1] != '\\'; p--) {}
+        for (p = filename.End; p > filename.Begin && p[-1] != '/' && p[-1] != '\\'; p--) {}
-        ImFormatString(font_cfg.Name, IM_ARRAYSIZE(font_cfg.Name), "%s, %.0fpx", p, size_pixels);
+        filename.Begin = p;
+        ImFormatString(font_cfg.Name, IM_ARRAYSIZE(font_cfg.Name), "%.*s, %.0fpx", (int)filename.length(), filename.Begin, size_pixels);
     }
     return AddFontFromMemoryTTF(data, (int)data_size, size_pixels, &font_cfg, glyph_ranges);
 }
@@ -2188,11 +2188,11 @@ ImFont* ImFontAtlas::AddFontFromMemoryCompressedTTF(const void* compressed_ttf_d
     return AddFontFromMemoryTTF(buf_decompressed_data, (int)buf_decompressed_size, size_pixels, &font_cfg, glyph_ranges);
 }
 
-ImFont* ImFontAtlas::AddFontFromMemoryCompressedBase85TTF(const char* compressed_ttf_data_base85, float size_pixels, const ImFontConfig* font_cfg, const ImWchar* glyph_ranges)
+ImFont* ImFontAtlas::AddFontFromMemoryCompressedBase85TTF(ImStrv compressed_ttf_data_base85, float size_pixels, const ImFontConfig* font_cfg, const ImWchar* glyph_ranges)
 {
-    int compressed_ttf_size = (((int)strlen(compressed_ttf_data_base85) + 4) / 5) * 4;
+    int compressed_ttf_size = (((int)compressed_ttf_data_base85.length() + 4) / 5) * 4;
     void* compressed_ttf = IM_ALLOC((size_t)compressed_ttf_size);
-    Decode85((const unsigned char*)compressed_ttf_data_base85, (unsigned char*)compressed_ttf);
+    Decode85(compressed_ttf_data_base85, (unsigned char*)compressed_ttf);
     ImFont* font = AddFontFromMemoryCompressedTTF(compressed_ttf, compressed_ttf_size, size_pixels, font_cfg, glyph_ranges);
     IM_FREE(compressed_ttf);
     return font;
@@ -3064,13 +3064,13 @@ const ImWchar*  ImFontAtlas::GetGlyphRangesVietnamese()
 // [SECTION] ImFontGlyphRangesBuilder
 //-----------------------------------------------------------------------------
 
-void ImFontGlyphRangesBuilder::AddText(const char* text, const char* text_end)
+void ImFontGlyphRangesBuilder::AddText(ImStrv text)
 {
-    while (text_end ? (text < text_end) : *text)
+    while (!text.empty())
     {
         unsigned int c = 0;
-        int c_len = ImTextCharFromUtf8(&c, text, text_end);
+        int c_len = ImTextCharFromUtf8(&c, text.Begin, text.End);
-        text += c_len;
+        text.Begin += c_len;
         if (c_len == 0)
             break;
         AddChar((ImWchar)c);
@@ -3329,7 +3329,7 @@ const ImFontGlyph* ImFont::FindGlyphNoFallback(ImWchar c) const
     return &Glyphs.Data[i];
 }
 
-const char* ImFont::CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) const
+const char* ImFont::CalcWordWrapPositionA(float scale, ImStrv text, float wrap_width) const
 {
     // Simple word-wrapping for English, not full-featured. Please submit failing cases!
     // FIXME: Much possible improvements (don't cut things like "word !", "word!!!" but cut within "word,,,,", more sensible support for punctuations, support for Unicode punctuations, etc.)
@@ -3351,11 +3351,14 @@ const char* ImFont::CalcWordWrapPositionA(float scale, const char* text, const c
     float blank_width = 0.0f;
     wrap_width /= scale; // We work with unscaled widths to avoid scaling every characters
 
-    const char* word_end = text;
+    const char* text_begin = text.Begin;
+    const char* text_end = text.End;
+
+    const char* word_end = text_begin;
     const char* prev_word_end = NULL;
     bool inside_word = true;
 
-    const char* s = text;
+    const char* s = text_begin;
     while (s < text_end)
     {
         unsigned int c = (unsigned int)*s;
@@ -3428,17 +3431,17 @@ const char* ImFont::CalcWordWrapPositionA(float scale, const char* text, const c
     return s;
 }
 
-ImVec2 ImFont::CalcTextSizeA(float size, float max_width, float wrap_width, const char* text_begin, const char* text_end, const char** remaining) const
+ImVec2 ImFont::CalcTextSizeA(float size, float max_width, float wrap_width, ImStrv text, const char** remaining) const
 {
-    if (!text_end)
-        text_end = text_begin + strlen(text_begin); // FIXME-OPT: Need to avoid this.
-
     const float line_height = size;
     const float scale = size / FontSize;
 
     ImVec2 text_size = ImVec2(0, 0);
     float line_width = 0.0f;
 
+    const char* text_begin = text.Begin;
+    const char* text_end = text.End;
+
     const bool word_wrap_enabled = (wrap_width > 0.0f);
     const char* word_wrap_eol = NULL;
 
@@ -3450,7 +3453,7 @@ ImVec2 ImFont::CalcTextSizeA(float size, float max_width, float wrap_width, cons
             // Calculate how far we can render. Requires two passes on the string data but keeps the code simple and not intrusive for what's essentially an uncommon feature.
             if (!word_wrap_eol)
             {
-                word_wrap_eol = CalcWordWrapPositionA(scale, s, text_end, wrap_width - line_width);
+                word_wrap_eol = CalcWordWrapPositionA(scale, ImStrv(s, text_end), wrap_width - line_width);
                 if (word_wrap_eol == s) // Wrap_width is too small to fit anything. Force displaying 1 character to minimize the height discontinuity.
                     word_wrap_eol++;    // +1 may not be a character start point in UTF-8 but it's ok because we use s >= word_wrap_eol below
             }
@@ -3538,11 +3541,8 @@ void ImFont::RenderChar(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col
 }
 
 // Note: as with every ImDrawList drawing function, this expects that the font atlas texture is bound.
-void ImFont::RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, float wrap_width, bool cpu_fine_clip) const
+void ImFont::RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, ImStrv text, float wrap_width, bool cpu_fine_clip) const
 {
-    if (!text_end)
-        text_end = text_begin + strlen(text_begin); // ImGui:: functions generally already provides a valid text_end, so this is merely to handle direct calls.
-
     // Align to be pixel perfect
     pos.x = IM_FLOOR(pos.x);
     pos.y = IM_FLOOR(pos.y);
@@ -3557,7 +3557,8 @@ void ImFont::RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col
     const char* word_wrap_eol = NULL;
 
     // Fast-forward to first visible line
-    const char* s = text_begin;
+    const char* s = text.Begin;
+    const char* text_end = text.End;
     if (y + line_height < clip_rect.y && !word_wrap_enabled)
         while (y + line_height < clip_rect.y && s < text_end)
         {
@@ -3595,14 +3596,14 @@ void ImFont::RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col
 
     const ImU32 col_untinted = col | ~IM_COL32_A_MASK;
 
-    while (s < text_end)
+    while (s < text.End)
     {
         if (word_wrap_enabled)
         {
             // Calculate how far we can render. Requires two passes on the string data but keeps the code simple and not intrusive for what's essentially an uncommon feature.
             if (!word_wrap_eol)
             {
-                word_wrap_eol = CalcWordWrapPositionA(scale, s, text_end, wrap_width - (x - pos.x));
+                word_wrap_eol = CalcWordWrapPositionA(scale, ImStrv(s, text_end), wrap_width - (x - pos.x));
                 if (word_wrap_eol == s) // Wrap_width is too small to fit anything. Force displaying 1 character to minimize the height discontinuity.
                     word_wrap_eol++;    // +1 may not be a character start point in UTF-8 but it's ok because we use s >= word_wrap_eol below
             }
@@ -3736,7 +3737,6 @@ void ImFont::RenderText(ImDrawList* draw_list, float size, ImVec2 pos, ImU32 col
 // - RenderArrow()
 // - RenderBullet()
 // - RenderCheckMark()
-// - RenderMouseCursor()
 // - RenderArrowPointingAt()
 // - RenderRectFilledRangeH()
 // - RenderRectFilledWithHole()
@@ -3797,27 +3797,6 @@ void ImGui::RenderCheckMark(ImDrawList* draw_list, ImVec2 pos, ImU32 col, float
     draw_list->PathStroke(col, 0, thickness);
 }
 
-void ImGui::RenderMouseCursor(ImDrawList* draw_list, ImVec2 pos, float scale, ImGuiMouseCursor mouse_cursor, ImU32 col_fill, ImU32 col_border, ImU32 col_shadow)
-{
-    if (mouse_cursor == ImGuiMouseCursor_None)
-        return;
-    IM_ASSERT(mouse_cursor > ImGuiMouseCursor_None && mouse_cursor < ImGuiMouseCursor_COUNT);
-
-    ImFontAtlas* font_atlas = draw_list->_Data->Font->ContainerAtlas;
-    ImVec2 offset, size, uv[4];
-    if (font_atlas->GetMouseCursorTexData(mouse_cursor, &offset, &size, &uv[0], &uv[2]))
-    {
-        pos -= offset;
-        ImTextureID tex_id = font_atlas->TexID;
-        draw_list->PushTextureID(tex_id);
-        draw_list->AddImage(tex_id, pos + ImVec2(1, 0) * scale, pos + (ImVec2(1, 0) + size) * scale,    uv[2], uv[3], col_shadow);
-        draw_list->AddImage(tex_id, pos + ImVec2(2, 0) * scale, pos + (ImVec2(2, 0) + size) * scale,    uv[2], uv[3], col_shadow);
-        draw_list->AddImage(tex_id, pos,                        pos + size * scale,                     uv[2], uv[3], col_border);
-        draw_list->AddImage(tex_id, pos,                        pos + size * scale,                     uv[0], uv[1], col_fill);
-        draw_list->PopTextureID();
-    }
-}
-
 // Render an arrow. 'pos' is position of the arrow tip. half_sz.x is length from base to tip. half_sz.y is length on each side.
 void ImGui::RenderArrowPointingAt(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGuiDir direction, ImU32 col)
 {

imgui_internal.h

@@ -1,4 +1,4 @@
-// dear imgui, v1.87
+// dear imgui, v1.88 WIP
 // (internal structures/api)
 
 // You may use this file to debug, understand or extend ImGui features but we don't provide any guarantee of forward compatibility!
@@ -295,7 +295,8 @@ namespace ImStb
 
 // Helpers: Hashing
 IMGUI_API ImGuiID       ImHashData(const void* data, size_t data_size, ImU32 seed = 0);
-IMGUI_API ImGuiID       ImHashStr(const char* data, size_t data_size = 0, ImU32 seed = 0);
+IMGUI_API ImGuiID       ImHashStr(ImStrv str, ImU32 seed = 0);
+static inline ImGuiID   ImHashStr(const char* data, size_t data_size = 0, ImU32 seed = 0) { return ImHashStr(ImStrv(data, data_size ? data + data_size : NULL), seed); }
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
 static inline ImGuiID   ImHash(const void* data, int size, ImU32 seed = 0) { return size ? ImHashData(data, (size_t)size, seed) : ImHashStr((const char*)data, 0, seed); } // [moved to ImHashStr/ImHashData in 1.68]
 #endif
@@ -314,16 +315,22 @@ static inline bool      ImIsPowerOfTwo(ImU64 v)         { return v != 0 && (v &
 static inline int       ImUpperPowerOfTwo(int v)        { v--; v |= v >> 1; v |= v >> 2; v |= v >> 4; v |= v >> 8; v |= v >> 16; v++; return v; }
 
 // Helpers: String, Formatting
+static inline int       ImStrcmp(const char* str1, const char* str2) { return strcmp(str1, str2); }
+IMGUI_API int           ImStrcmp(ImStrv str1, ImStrv str2);
 IMGUI_API int           ImStricmp(const char* str1, const char* str2);
 IMGUI_API int           ImStrnicmp(const char* str1, const char* str2, size_t count);
+IMGUI_API void          ImStrncpy(char* dst, ImStrv src, size_t count);
 IMGUI_API void          ImStrncpy(char* dst, const char* src, size_t count);
 IMGUI_API char*         ImStrdup(const char* str);
+IMGUI_API char*         ImStrdup(ImStrv str);
+IMGUI_API char*         ImStrdupcpy(char* dst, size_t* p_dst_size, ImStrv str);
 IMGUI_API char*         ImStrdupcpy(char* dst, size_t* p_dst_size, const char* str);
 IMGUI_API const char*   ImStrchrRange(const char* str_begin, const char* str_end, char c);
 IMGUI_API int           ImStrlenW(const ImWchar* str);
 IMGUI_API const char*   ImStreolRange(const char* str, const char* str_end);                // End end-of-line
 IMGUI_API const ImWchar*ImStrbolW(const ImWchar* buf_mid_line, const ImWchar* buf_begin);   // Find beginning-of-line
 IMGUI_API const char*   ImStristr(const char* haystack, const char* haystack_end, const char* needle, const char* needle_end);
+IMGUI_API const char*   ImStrstr(ImStrv haystack, ImStrv needle);
 IMGUI_API void          ImStrTrimBlanks(char* str);
 IMGUI_API const char*   ImStrSkipBlank(const char* str);
 IMGUI_API int           ImFormatString(char* buf, size_t buf_size, const char* fmt, ...) IM_FMTARGS(3);
@@ -371,7 +378,7 @@ IM_MSVC_RUNTIME_CHECKS_RESTORE
 #ifdef IMGUI_DISABLE_FILE_FUNCTIONS
 #define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS
 typedef void* ImFileHandle;
-static inline ImFileHandle  ImFileOpen(const char*, const char*)                    { return NULL; }
+static inline ImFileHandle  ImFileOpen(ImStrv, ImStrv)                              { return NULL; }
 static inline bool          ImFileClose(ImFileHandle)                               { return false; }
 static inline ImU64         ImFileGetSize(ImFileHandle)                             { return (ImU64)-1; }
 static inline ImU64         ImFileRead(void*, ImU64, ImU64, ImFileHandle)           { return 0; }
@@ -379,7 +386,7 @@ static inline ImU64         ImFileWrite(const void*, ImU64, ImU64, ImFileHandle)
 #endif
 #ifndef IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS
 typedef FILE* ImFileHandle;
-IMGUI_API ImFileHandle      ImFileOpen(const char* filename, const char* mode);
+IMGUI_API ImFileHandle      ImFileOpen(ImStrv filename, ImStrv mode);
 IMGUI_API bool              ImFileClose(ImFileHandle file);
 IMGUI_API ImU64             ImFileGetSize(ImFileHandle file);
 IMGUI_API ImU64             ImFileRead(void* data, ImU64 size, ImU64 count, ImFileHandle file);
@@ -387,7 +394,7 @@ IMGUI_API ImU64             ImFileWrite(const void* data, ImU64 size, ImU64 coun
 #else
 #define IMGUI_DISABLE_TTY_FUNCTIONS // Can't use stdout, fflush if we are not using default file functions
 #endif
-IMGUI_API void*             ImFileLoadToMemory(const char* filename, const char* mode, size_t* out_file_size = NULL, int padding_bytes = 0);
+IMGUI_API void*             ImFileLoadToMemory(ImStrv filename, ImStrv mode, size_t* out_file_size = NULL, int padding_bytes = 0);
 
 // Helpers: Maths
 IM_MSVC_RUNTIME_CHECKS_OFF
@@ -469,17 +476,17 @@ IM_MSVC_RUNTIME_CHECKS_OFF
 struct ImVec1
 {
     float   x;
-    ImVec1()         { x = 0.0f; }
+    constexpr ImVec1()         : x(0.0f) { }
-    ImVec1(float _x) { x = _x; }
+    constexpr ImVec1(float _x) : x(_x) { }
 };
 
 // Helper: ImVec2ih (2D vector, half-size integer, for long-term packed storage)
 struct ImVec2ih
 {
     short   x, y;
-    ImVec2ih()                           { x = y = 0; }
+    constexpr ImVec2ih()                           : x(0), y(0) {}
-    ImVec2ih(short _x, short _y)         { x = _x; y = _y; }
+    constexpr ImVec2ih(short _x, short _y)         : x(_x), y(_y) {}
-    explicit ImVec2ih(const ImVec2& rhs) { x = (short)rhs.x; y = (short)rhs.y; }
+    constexpr explicit ImVec2ih(const ImVec2& rhs) : x((short)rhs.x), y((short)rhs.y) {}
 };
 
 // Helper: ImRect (2D axis aligned bounding-box)
@@ -489,10 +496,10 @@ struct IMGUI_API ImRect
     ImVec2      Min;    // Upper-left
     ImVec2      Max;    // Lower-right
 
-    ImRect()                                        : Min(0.0f, 0.0f), Max(0.0f, 0.0f)  {}
+    constexpr ImRect()                                        : Min(0.0f, 0.0f), Max(0.0f, 0.0f)  {}
-    ImRect(const ImVec2& min, const ImVec2& max)    : Min(min), Max(max)                {}
+    constexpr ImRect(const ImVec2& min, const ImVec2& max)    : Min(min), Max(max)                {}
-    ImRect(const ImVec4& v)                         : Min(v.x, v.y), Max(v.z, v.w)      {}
+    constexpr ImRect(const ImVec4& v)                         : Min(v.x, v.y), Max(v.z, v.w)      {}
-    ImRect(float x1, float y1, float x2, float y2)  : Min(x1, y1), Max(x2, y2)          {}
+    constexpr ImRect(float x1, float y1, float x2, float y2)  : Min(x1, y1), Max(x2, y2)          {}
 
     ImVec2      GetCenter() const                   { return ImVec2((Min.x + Max.x) * 0.5f, (Min.y + Max.y) * 0.5f); }
     ImVec2      GetSize() const                     { return ImVec2(Max.x - Min.x, Max.y - Min.y); }
@@ -547,11 +554,11 @@ struct ImBitArray
     ImBitArray()                                { ClearAllBits(); }
     void            ClearAllBits()              { memset(Storage, 0, sizeof(Storage)); }
     void            SetAllBits()                { memset(Storage, 255, sizeof(Storage)); }
-    bool            TestBit(int n) const        { IM_ASSERT(n + OFFSET < BITCOUNT); return ImBitArrayTestBit(Storage, n + OFFSET); }
+    bool            TestBit(int n) const        { n += OFFSET; IM_ASSERT(n >= 0 && n < BITCOUNT); return ImBitArrayTestBit(Storage, n); }
-    void            SetBit(int n)               { IM_ASSERT(n + OFFSET < BITCOUNT); ImBitArraySetBit(Storage, n + OFFSET); }
+    void            SetBit(int n)               { n += OFFSET; IM_ASSERT(n >= 0 && n < BITCOUNT); ImBitArraySetBit(Storage, n); }
-    void            ClearBit(int n)             { IM_ASSERT(n + OFFSET < BITCOUNT); ImBitArrayClearBit(Storage, n + OFFSET); }
+    void            ClearBit(int n)             { n += OFFSET; IM_ASSERT(n >= 0 && n < BITCOUNT); ImBitArrayClearBit(Storage, n); }
-    void            SetBitRange(int n, int n2)  { ImBitArraySetBitRange(Storage, n + OFFSET, n2 + OFFSET); } // Works on range [n..n2)
+    void            SetBitRange(int n, int n2)  { n += OFFSET; n2 += OFFSET; IM_ASSERT(n >= 0 && n < BITCOUNT && n2 > n && n2 <= BITCOUNT); ImBitArraySetBitRange(Storage, n, n2); } // Works on range [n..n2)
-    bool            operator[](int n) const     { IM_ASSERT(n + OFFSET < BITCOUNT); return ImBitArrayTestBit(Storage, n + OFFSET); }
+    bool            operator[](int n) const     { n += OFFSET; IM_ASSERT(n >= 0 && n < BITCOUNT); return ImBitArrayTestBit(Storage, n); }
 };
 
 // Helper: ImBitVector
@@ -1171,7 +1178,7 @@ enum ImGuiInputEventType
     ImGuiInputEventType_MouseWheel,
     ImGuiInputEventType_MouseButton,
     ImGuiInputEventType_Key,
-    ImGuiInputEventType_Char,
+    ImGuiInputEventType_Text,
     ImGuiInputEventType_Focus,
     ImGuiInputEventType_COUNT
 };
@@ -1510,7 +1517,8 @@ struct ImGuiStackLevelInfo
     ImGuiID                 ID;
     ImS8                    QueryFrameCount;            // >= 1: Query in progress
     bool                    QuerySuccess;               // Obtained result from DebugHookIdInfo()
-    char                    Desc[58];                   // Arbitrarily sized buffer to hold a result (FIXME: could replace Results[] with a chunk stream?)
+    ImGuiDataType           DataType : 8;
+    char                    Desc[57];                   // Arbitrarily sized buffer to hold a result (FIXME: could replace Results[] with a chunk stream?) FIXME: Now that we added CTRL+C this should be fixed.
 
     ImGuiStackLevelInfo()   { memset(this, 0, sizeof(*this)); }
 };
@@ -1522,8 +1530,10 @@ struct ImGuiStackTool
     int                     StackLevel;                 // -1: query stack and resize Results, >= 0: individual stack level
     ImGuiID                 QueryId;                    // ID to query details for
     ImVector<ImGuiStackLevelInfo> Results;
+    bool                    CopyToClipboardOnCtrlC;
+    float                   CopyToClipboardLastTime;
 
-    ImGuiStackTool()        { memset(this, 0, sizeof(*this)); }
+    ImGuiStackTool()        { memset(this, 0, sizeof(*this)); CopyToClipboardLastTime = -FLT_MAX; }
 };
 
 //-----------------------------------------------------------------------------
@@ -2104,13 +2114,16 @@ struct IMGUI_API ImGuiWindow
     bool                    MemoryCompacted;                    // Set when window extraneous data have been garbage collected
 
 public:
-    ImGuiWindow(ImGuiContext* context, const char* name);
+    ImGuiWindow(ImGuiContext* context, ImStrv name);
     ~ImGuiWindow();
 
-    ImGuiID     GetID(const char* str, const char* str_end = NULL);
+    ImGuiID     GetID(ImStrv str);
+    ImGuiID     GetID(const char* str)                      { return GetID(ImStrv(str)); }
+    ImGuiID     GetID(const char* str, const char* str_end) { return GetID(ImStrv(str, str_end)); }
     ImGuiID     GetID(const void* ptr);
     ImGuiID     GetID(int n);
-    ImGuiID     GetIDNoKeepAlive(const char* str, const char* str_end = NULL);
+    ImGuiID     GetIDNoKeepAlive(ImStrv str);
+    ImGuiID     GetIDNoKeepAlive(const char* str, const char* str_end = NULL) { return GetIDNoKeepAlive(ImStrv(str, str_end));}
     ImGuiID     GetIDNoKeepAlive(const void* ptr);
     ImGuiID     GetIDNoKeepAlive(int n);
     ImGuiID     GetIDFromRectangle(const ImRect& r_abs);
@@ -2474,7 +2487,7 @@ namespace ImGui
     inline    ImGuiWindow*  GetCurrentWindowRead()      { ImGuiContext& g = *GImGui; return g.CurrentWindow; }
     inline    ImGuiWindow*  GetCurrentWindow()          { ImGuiContext& g = *GImGui; g.CurrentWindow->WriteAccessed = true; return g.CurrentWindow; }
     IMGUI_API ImGuiWindow*  FindWindowByID(ImGuiID id);
-    IMGUI_API ImGuiWindow*  FindWindowByName(const char* name);
+    IMGUI_API ImGuiWindow*  FindWindowByName(ImStrv name);
     IMGUI_API void          UpdateWindowParentAndRootLinks(ImGuiWindow* window, ImGuiWindowFlags flags, ImGuiWindow* parent_window);
     IMGUI_API ImVec2        CalcWindowNextAutoFitSize(ImGuiWindow* window);
     IMGUI_API bool          IsWindowChildOf(ImGuiWindow* window, ImGuiWindow* potential_parent, bool popup_hierarchy);
@@ -2525,10 +2538,10 @@ namespace ImGui
     IMGUI_API void                  MarkIniSettingsDirty();
     IMGUI_API void                  MarkIniSettingsDirty(ImGuiWindow* window);
     IMGUI_API void                  ClearIniSettings();
-    IMGUI_API ImGuiWindowSettings*  CreateNewWindowSettings(const char* name);
+    IMGUI_API ImGuiWindowSettings*  CreateNewWindowSettings(ImStrv name);
     IMGUI_API ImGuiWindowSettings*  FindWindowSettings(ImGuiID id);
-    IMGUI_API ImGuiWindowSettings*  FindOrCreateWindowSettings(const char* name);
+    IMGUI_API ImGuiWindowSettings*  FindOrCreateWindowSettings(ImStrv name);
-    IMGUI_API ImGuiSettingsHandler* FindSettingsHandler(const char* type_name);
+    IMGUI_API ImGuiSettingsHandler* FindSettingsHandler(ImStrv type_name);
 
     // Scrolling
     IMGUI_API void          SetNextWindowScroll(const ImVec2& scroll); // Use -1.0f on one axis to leave as-is
@@ -2593,11 +2606,12 @@ namespace ImGui
     // Logging/Capture
     IMGUI_API void          LogBegin(ImGuiLogType type, int auto_open_depth);           // -> BeginCapture() when we design v2 api, for now stay under the radar by using the old name.
     IMGUI_API void          LogToBuffer(int auto_open_depth = -1);                      // Start logging/capturing to internal buffer
-    IMGUI_API void          LogRenderedText(const ImVec2* ref_pos, const char* text, const char* text_end = NULL);
+    IMGUI_API void          LogRenderedText(const ImVec2* ref_pos, ImStrv text);
+    inline    void          LogRenderedText(const ImVec2* ref_pos, const char* text, const char* text_end) { LogRenderedText(ref_pos, ImStrv(text, text_end)); }
     IMGUI_API void          LogSetNextTextDecoration(const char* prefix, const char* suffix);
 
     // Popups, Modals, Tooltips
-    IMGUI_API bool          BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, bool border, ImGuiWindowFlags flags);
+    IMGUI_API bool          BeginChildEx(ImStrv name, ImGuiID id, const ImVec2& size_arg, bool border, ImGuiWindowFlags flags);
     IMGUI_API void          OpenPopupEx(ImGuiID id, ImGuiPopupFlags popup_flags = ImGuiPopupFlags_None);
     IMGUI_API void          ClosePopupToLevel(int remaining, bool restore_focus_to_window_under_popup);
     IMGUI_API void          ClosePopupsOverWindow(ImGuiWindow* ref_window, bool restore_focus_to_window_under_popup);
@@ -2612,9 +2626,9 @@ namespace ImGui
     IMGUI_API ImVec2        FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy);
 
     // Menus
-    IMGUI_API bool          BeginViewportSideBar(const char* name, ImGuiViewport* viewport, ImGuiDir dir, float size, ImGuiWindowFlags window_flags);
+    IMGUI_API bool          BeginViewportSideBar(ImStrv name, ImGuiViewport* viewport, ImGuiDir dir, float size, ImGuiWindowFlags window_flags);
-    IMGUI_API bool          BeginMenuEx(const char* label, const char* icon, bool enabled = true);
+    IMGUI_API bool          BeginMenuEx(ImStrv label, ImStrv icon, bool enabled = true);
-    IMGUI_API bool          MenuItemEx(const char* label, const char* icon, const char* shortcut = NULL, bool selected = false, bool enabled = true);
+    IMGUI_API bool          MenuItemEx(ImStrv label, ImStrv icon, ImStrv shortcut = ImStrv(), bool selected = false, bool enabled = true);
 
     // Combos
     IMGUI_API bool          BeginComboPopup(ImGuiID popup_id, const ImRect& bb, ImGuiComboFlags flags);
@@ -2673,12 +2687,12 @@ namespace ImGui
 
     // Internal Columns API (this is not exposed because we will encourage transitioning to the Tables API)
     IMGUI_API void          SetWindowClipRectBeforeSetChannel(ImGuiWindow* window, const ImRect& clip_rect);
-    IMGUI_API void          BeginColumns(const char* str_id, int count, ImGuiOldColumnFlags flags = 0); // setup number of columns. use an identifier to distinguish multiple column sets. close with EndColumns().
+    IMGUI_API void          BeginColumns(ImStrv str_id, int count, ImGuiOldColumnFlags flags = 0);      // setup number of columns. use an identifier to distinguish multiple column sets. close with EndColumns().
     IMGUI_API void          EndColumns();                                                               // close columns
     IMGUI_API void          PushColumnClipRect(int column_index);
     IMGUI_API void          PushColumnsBackground();
     IMGUI_API void          PopColumnsBackground();
-    IMGUI_API ImGuiID       GetColumnsID(const char* str_id, int count);
+    IMGUI_API ImGuiID       GetColumnsID(ImStrv str_id, int count);
     IMGUI_API ImGuiOldColumns* FindOrCreateColumns(ImGuiWindow* window, ImGuiID id);
     IMGUI_API float         GetColumnOffsetFromNorm(const ImGuiOldColumns* columns, float offset_norm);
     IMGUI_API float         GetColumnNormFromOffset(const ImGuiOldColumns* columns, float offset);
@@ -2695,7 +2709,7 @@ namespace ImGui
     // Tables: Internals
     inline    ImGuiTable*   GetCurrentTable() { ImGuiContext& g = *GImGui; return g.CurrentTable; }
     IMGUI_API ImGuiTable*   TableFindByID(ImGuiID id);
-    IMGUI_API bool          BeginTableEx(const char* name, ImGuiID id, int columns_count, ImGuiTableFlags flags = 0, const ImVec2& outer_size = ImVec2(0, 0), float inner_width = 0.0f);
+    IMGUI_API bool          BeginTableEx(ImStrv name, ImGuiID id, int columns_count, ImGuiTableFlags flags = 0, const ImVec2& outer_size = ImVec2(0, 0), float inner_width = 0.0f);
     IMGUI_API void          TableBeginInitMemory(ImGuiTable* table, int columns_count);
     IMGUI_API void          TableBeginApplyRequests(ImGuiTable* table);
     IMGUI_API void          TableSetupDrawChannels(ImGuiTable* table);
@@ -2742,30 +2756,35 @@ namespace ImGui
     IMGUI_API void          TabBarQueueReorder(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, int offset);
     IMGUI_API void          TabBarQueueReorderFromMousePos(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, ImVec2 mouse_pos);
     IMGUI_API bool          TabBarProcessReorder(ImGuiTabBar* tab_bar);
-    IMGUI_API bool          TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open, ImGuiTabItemFlags flags);
+    IMGUI_API bool          TabItemEx(ImGuiTabBar* tab_bar, ImStrv label, bool* p_open, ImGuiTabItemFlags flags);
-    IMGUI_API ImVec2        TabItemCalcSize(const char* label, bool has_close_button);
+    IMGUI_API ImVec2        TabItemCalcSize(ImStrv label, bool has_close_button);
     IMGUI_API void          TabItemBackground(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImU32 col);
-    IMGUI_API void          TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, const char* label, ImGuiID tab_id, ImGuiID close_button_id, bool is_contents_visible, bool* out_just_closed, bool* out_text_clipped);
+    IMGUI_API void          TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, ImStrv label, ImGuiID tab_id, ImGuiID close_button_id, bool is_contents_visible, bool* out_just_closed, bool* out_text_clipped);
 
     // Render helpers
     // AVOID USING OUTSIDE OF IMGUI.CPP! NOT FOR PUBLIC CONSUMPTION. THOSE FUNCTIONS ARE A MESS. THEIR SIGNATURE AND BEHAVIOR WILL CHANGE, THEY NEED TO BE REFACTORED INTO SOMETHING DECENT.
     // NB: All position are in absolute pixels coordinates (we are never using window coordinates internally)
-    IMGUI_API void          RenderText(ImVec2 pos, const char* text, const char* text_end = NULL, bool hide_text_after_hash = true);
+    IMGUI_API void          RenderText(ImVec2 pos, ImStrv text, bool hide_text_after_hash = true);
-    IMGUI_API void          RenderTextWrapped(ImVec2 pos, const char* text, const char* text_end, float wrap_width);
+    inline    void          RenderText(ImVec2 pos, const char* text, const char* text_end, bool hide_text_after_hash = true) { RenderText(pos, ImStrv(text, text_end), hide_text_after_hash); }
-    IMGUI_API void          RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0, 0), const ImRect* clip_rect = NULL);
+    IMGUI_API void          RenderTextWrapped(ImVec2 pos, ImStrv text, float wrap_width);
-    IMGUI_API void          RenderTextClippedEx(ImDrawList* draw_list, const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0, 0), const ImRect* clip_rect = NULL);
+    inline    void          RenderTextWrapped(ImVec2 pos, const char* text, const char* text_end, float wrap_width) { RenderTextWrapped(pos, ImStrv(text, text_end), wrap_width); }
-    IMGUI_API void          RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, const ImVec2& pos_max, float clip_max_x, float ellipsis_max_x, const char* text, const char* text_end, const ImVec2* text_size_if_known);
+    IMGUI_API void          RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, ImStrv text, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0, 0), const ImRect* clip_rect = NULL);
+    inline    void          RenderTextClipped(const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0,0), const ImRect* clip_rect = NULL) { RenderTextClipped(pos_min, pos_max, ImStrv(text, text_end), text_size_if_known, align, clip_rect); }
+    IMGUI_API void          RenderTextClippedEx(ImDrawList* draw_list, const ImVec2& pos_min, const ImVec2& pos_max, ImStrv text, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0, 0), const ImRect* clip_rect = NULL);
+    inline    void          RenderTextClippedEx(ImDrawList* draw_list, const ImVec2& pos_min, const ImVec2& pos_max, const char* text, const char* text_end, const ImVec2* text_size_if_known, const ImVec2& align = ImVec2(0, 0), const ImRect* clip_rect = NULL) { RenderTextClippedEx(draw_list, pos_min, pos_max, ImStrv(text, text_end), text_size_if_known, align, clip_rect); }
+    IMGUI_API void          RenderTextEllipsis(ImDrawList* draw_list, const ImVec2& pos_min, const ImVec2& pos_max, float clip_max_x, float ellipsis_max_x, ImStrv text, const ImVec2* text_size_if_known);
     IMGUI_API void          RenderFrame(ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, bool border = true, float rounding = 0.0f);
     IMGUI_API void          RenderFrameBorder(ImVec2 p_min, ImVec2 p_max, float rounding = 0.0f);
     IMGUI_API void          RenderColorRectWithAlphaCheckerboard(ImDrawList* draw_list, ImVec2 p_min, ImVec2 p_max, ImU32 fill_col, float grid_step, ImVec2 grid_off, float rounding = 0.0f, ImDrawFlags flags = 0);
     IMGUI_API void          RenderNavHighlight(const ImRect& bb, ImGuiID id, ImGuiNavHighlightFlags flags = ImGuiNavHighlightFlags_TypeDefault); // Navigation highlight
-    IMGUI_API const char*   FindRenderedTextEnd(const char* text, const char* text_end = NULL); // Find the optional ## from which we stop displaying text.
+    IMGUI_API const char*   FindRenderedTextEnd(ImStrv text);                                    // Find the optional ## from which we stop displaying text.
+    inline    const char*   FindRenderedTextEnd(const char* text, const char* text_end) { return FindRenderedTextEnd(ImStrv(text, text_end)); }
+    IMGUI_API void          RenderMouseCursor(ImVec2 pos, float scale, ImGuiMouseCursor mouse_cursor, ImU32 col_fill, ImU32 col_border, ImU32 col_shadow);
 
     // Render helpers (those functions don't access any ImGui state!)
     IMGUI_API void          RenderArrow(ImDrawList* draw_list, ImVec2 pos, ImU32 col, ImGuiDir dir, float scale = 1.0f);
     IMGUI_API void          RenderBullet(ImDrawList* draw_list, ImVec2 pos, ImU32 col);
     IMGUI_API void          RenderCheckMark(ImDrawList* draw_list, ImVec2 pos, ImU32 col, float sz);
-    IMGUI_API void          RenderMouseCursor(ImDrawList* draw_list, ImVec2 pos, float scale, ImGuiMouseCursor mouse_cursor, ImU32 col_fill, ImU32 col_border, ImU32 col_shadow);
     IMGUI_API void          RenderArrowPointingAt(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGuiDir direction, ImU32 col);
     IMGUI_API void          RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, ImU32 col, float x_start_norm, float x_end_norm, float rounding);
     IMGUI_API void          RenderRectFilledWithHole(ImDrawList* draw_list, ImRect outer, ImRect inner, ImU32 col, float rounding);
@@ -2777,11 +2796,12 @@ namespace ImGui
 #endif
 
     // Widgets
-    IMGUI_API void          TextEx(const char* text, const char* text_end = NULL, ImGuiTextFlags flags = 0);
+    IMGUI_API void          TextEx(ImStrv text, ImGuiTextFlags flags = 0);
-    IMGUI_API bool          ButtonEx(const char* label, const ImVec2& size_arg = ImVec2(0, 0), ImGuiButtonFlags flags = 0);
+    inline    void          TextEx(const char* text, const char* text_end, ImGuiTextFlags flags = 0) { TextEx(ImStrv(text, text_end), flags); }
+    IMGUI_API bool          ButtonEx(ImStrv label, const ImVec2& size_arg = ImVec2(0, 0), ImGuiButtonFlags flags = 0);
     IMGUI_API bool          CloseButton(ImGuiID id, const ImVec2& pos);
     IMGUI_API bool          CollapseButton(ImGuiID id, const ImVec2& pos);
-    IMGUI_API bool          ArrowButtonEx(const char* str_id, ImGuiDir dir, ImVec2 size_arg, ImGuiButtonFlags flags = 0);
+    IMGUI_API bool          ArrowButtonEx(ImStrv str_id, ImGuiDir dir, ImVec2 size_arg, ImGuiButtonFlags flags = 0);
     IMGUI_API void          Scrollbar(ImGuiAxis axis);
     IMGUI_API bool          ScrollbarEx(const ImRect& bb, ImGuiID id, ImGuiAxis axis, ImS64* p_scroll_v, ImS64 avail_v, ImS64 contents_v, ImDrawFlags flags);
     IMGUI_API bool          ImageButtonEx(ImGuiID id, ImTextureID texture_id, const ImVec2& size, const ImVec2& uv0, const ImVec2& uv1, const ImVec2& padding, const ImVec4& bg_col, const ImVec4& tint_col);
@@ -2790,15 +2810,15 @@ namespace ImGui
     IMGUI_API ImGuiID       GetWindowResizeCornerID(ImGuiWindow* window, int n); // 0..3: corners
     IMGUI_API ImGuiID       GetWindowResizeBorderID(ImGuiWindow* window, ImGuiDir dir);
     IMGUI_API void          SeparatorEx(ImGuiSeparatorFlags flags);
-    IMGUI_API bool          CheckboxFlags(const char* label, ImS64* flags, ImS64 flags_value);
+    IMGUI_API bool          CheckboxFlags(ImStrv label, ImS64* flags, ImS64 flags_value);
-    IMGUI_API bool          CheckboxFlags(const char* label, ImU64* flags, ImU64 flags_value);
+    IMGUI_API bool          CheckboxFlags(ImStrv label, ImU64* flags, ImU64 flags_value);
 
     // Widgets low-level behaviors
     IMGUI_API bool          ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool* out_held, ImGuiButtonFlags flags = 0);
     IMGUI_API bool          DragBehavior(ImGuiID id, ImGuiDataType data_type, void* p_v, float v_speed, const void* p_min, const void* p_max, const char* format, ImGuiSliderFlags flags);
     IMGUI_API bool          SliderBehavior(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, void* p_v, const void* p_min, const void* p_max, const char* format, ImGuiSliderFlags flags, ImRect* out_grab_bb);
     IMGUI_API bool          SplitterBehavior(const ImRect& bb, ImGuiID id, ImGuiAxis axis, float* size1, float* size2, float min_size1, float min_size2, float hover_extend = 0.0f, float hover_visibility_delay = 0.0f);
-    IMGUI_API bool          TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* label, const char* label_end = NULL);
+    IMGUI_API bool          TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, ImStrv label);
     IMGUI_API bool          TreeNodeBehaviorIsOpen(ImGuiID id, ImGuiTreeNodeFlags flags = 0);                     // Consume previous SetNextItemOpen() data, if any. May return true when logging
     IMGUI_API void          TreePushOverrideID(ImGuiID id);
 
@@ -2810,7 +2830,7 @@ namespace ImGui
     template<typename T, typename SIGNED_T, typename FLOAT_T>   IMGUI_API bool  DragBehaviorT(ImGuiDataType data_type, T* v, float v_speed, T v_min, T v_max, const char* format, ImGuiSliderFlags flags);
     template<typename T, typename SIGNED_T, typename FLOAT_T>   IMGUI_API bool  SliderBehaviorT(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, T* v, T v_min, T v_max, const char* format, ImGuiSliderFlags flags, ImRect* out_grab_bb);
     template<typename T, typename SIGNED_T>                     IMGUI_API T     RoundScalarWithFormatT(const char* format, ImGuiDataType data_type, T v);
-    template<typename T>                                        IMGUI_API bool  CheckboxFlagsT(const char* label, T* flags, T flags_value);
+    template<typename T>                                        IMGUI_API bool  CheckboxFlagsT(ImStrv label, T* flags, T flags_value);
 
     // Data type helpers
     IMGUI_API const ImGuiDataTypeInfo*  DataTypeGetInfo(ImGuiDataType data_type);
@@ -2821,19 +2841,19 @@ namespace ImGui
     IMGUI_API bool          DataTypeClamp(ImGuiDataType data_type, void* p_data, const void* p_min, const void* p_max);
 
     // InputText
-    IMGUI_API bool          InputTextEx(const char* label, const char* hint, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
+    IMGUI_API bool          InputTextEx(ImStrv label, ImStrv hint, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
-    IMGUI_API bool          TempInputText(const ImRect& bb, ImGuiID id, const char* label, char* buf, int buf_size, ImGuiInputTextFlags flags);
+    IMGUI_API bool          TempInputText(const ImRect& bb, ImGuiID id, ImStrv label, char* buf, int buf_size, ImGuiInputTextFlags flags);
-    IMGUI_API bool          TempInputScalar(const ImRect& bb, ImGuiID id, const char* label, ImGuiDataType data_type, void* p_data, const char* format, const void* p_clamp_min = NULL, const void* p_clamp_max = NULL);
+    IMGUI_API bool          TempInputScalar(const ImRect& bb, ImGuiID id, ImStrv label, ImGuiDataType data_type, void* p_data, const char* format, const void* p_clamp_min = NULL, const void* p_clamp_max = NULL);
     inline bool             TempInputIsActive(ImGuiID id)       { ImGuiContext& g = *GImGui; return (g.ActiveId == id && g.TempInputId == id); }
     inline ImGuiInputTextState* GetInputTextState(ImGuiID id)   { ImGuiContext& g = *GImGui; return (g.InputTextState.ID == id) ? &g.InputTextState : NULL; } // Get input text state if active
 
     // Color
-    IMGUI_API void          ColorTooltip(const char* text, const float* col, ImGuiColorEditFlags flags);
+    IMGUI_API void          ColorTooltip(ImStrv text, const float* col, ImGuiColorEditFlags flags);
     IMGUI_API void          ColorEditOptionsPopup(const float* col, ImGuiColorEditFlags flags);
     IMGUI_API void          ColorPickerOptionsPopup(const float* ref_col, ImGuiColorEditFlags flags);
 
     // Plot
-    IMGUI_API int           PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 frame_size);
+    IMGUI_API int           PlotEx(ImGuiPlotType plot_type, ImStrv label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, ImStrv overlay_text, float scale_min, float scale_max, ImVec2 frame_size);
 
     // Shade functions (write over already created vertices)
     IMGUI_API void          ShadeVertsLinearColorGradientKeepAlpha(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1);
@@ -2899,7 +2919,7 @@ IMGUI_API void      ImFontAtlasBuildMultiplyRectAlpha8(const unsigned char table
 
 #ifdef IMGUI_ENABLE_TEST_ENGINE
 extern void         ImGuiTestEngineHook_ItemAdd(ImGuiContext* ctx, const ImRect& bb, ImGuiID id);
-extern void         ImGuiTestEngineHook_ItemInfo(ImGuiContext* ctx, ImGuiID id, const char* label, ImGuiItemStatusFlags flags);
+extern void         ImGuiTestEngineHook_ItemInfo(ImGuiContext* ctx, ImGuiID id, ImStrv label, ImGuiItemStatusFlags flags);
 extern void         ImGuiTestEngineHook_Log(ImGuiContext* ctx, const char* fmt, ...);
 extern const char*  ImGuiTestEngine_FindItemDebugLabel(ImGuiContext* ctx, ImGuiID id);
 

imgui_tables.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.87
+// dear imgui, v1.88 WIP
 // (tables and columns code)
 
 /*
@@ -301,13 +301,13 @@ ImGuiTable* ImGui::TableFindByID(ImGuiID id)
 }
 
 // Read about "TABLE SIZING" at the top of this file.
-bool    ImGui::BeginTable(const char* str_id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
+bool    ImGui::BeginTable(ImStrv str_id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
 {
     ImGuiID id = GetID(str_id);
     return BeginTableEx(str_id, id, columns_count, flags, outer_size, inner_width);
 }
 
-bool    ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
+bool    ImGui::BeginTableEx(ImStrv name, ImGuiID id, int columns_count, ImGuiTableFlags flags, const ImVec2& outer_size, float inner_width)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* outer_window = GetCurrentWindow();
@@ -1394,7 +1394,7 @@ void    ImGui::EndTable()
 
 // See "COLUMN SIZING POLICIES" comments at the top of this file
 // If (init_width_or_weight <= 0.0f) it is ignored
-void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, float init_width_or_weight, ImGuiID user_id)
+void ImGui::TableSetupColumn(ImStrv label, ImGuiTableColumnFlags flags, float init_width_or_weight, ImGuiID user_id)
 {
     ImGuiContext& g = *GImGui;
     ImGuiTable* table = g.CurrentTable;
@@ -1454,10 +1454,12 @@ void ImGui::TableSetupColumn(const char* label, ImGuiTableColumnFlags flags, flo
 
     // Store name (append with zero-terminator in contiguous buffer)
     column->NameOffset = -1;
-    if (label != NULL && label[0] != 0)
+    if (!label.empty())
     {
+        char zero_terminator = 0;
         column->NameOffset = (ImS16)table->ColumnsNames.size();
-        table->ColumnsNames.append(label, label + strlen(label) + 1);
+        table->ColumnsNames.append(label);
+        table->ColumnsNames.append(ImStrv(&zero_terminator, &zero_terminator + 1));
     }
 }
 
@@ -2856,7 +2858,7 @@ void ImGui::TableHeadersRow()
 // Emit a column header (text + optional sort order)
 // We cpu-clip text here so that all columns headers can be merged into a same draw call.
 // Note that because of how we cpu-clip and display sorting indicators, you _cannot_ use SameLine() after a TableHeader()
-void ImGui::TableHeader(const char* label)
+void ImGui::TableHeader(ImStrv label)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
@@ -2870,10 +2872,11 @@ void ImGui::TableHeader(const char* label)
     ImGuiTableColumn* column = &table->Columns[column_n];
 
     // Label
-    if (label == NULL)
+    if (!label)
         label = "";
-    const char* label_end = FindRenderedTextEnd(label);
+    ImGuiID id = window->GetID(label);
-    ImVec2 label_size = CalcTextSize(label, label_end, true);
+    label.End = FindRenderedTextEnd(label);
+    ImVec2 label_size = CalcTextSize(label, true);
     ImVec2 label_pos = window->DC.CursorPos;
 
     // If we already got a row height, there's use that.
@@ -2903,7 +2906,6 @@ void ImGui::TableHeader(const char* label)
 
     // Keep header highlighted when context menu is open.
     const bool selected = (table->IsContextPopupOpen && table->ContextPopupColumn == column_n && table->InstanceInteracted == table->InstanceCurrent);
-    ImGuiID id = window->GetID(label);
     ImRect bb(cell_r.Min.x, cell_r.Min.y, cell_r.Max.x, ImMax(cell_r.Max.y, cell_r.Min.y + label_height + g.Style.CellPadding.y * 2.0f));
     ItemSize(ImVec2(0.0f, label_height)); // Don't declare unclipped width, it'll be fed ContentMaxPosHeadersIdeal
     if (!ItemAdd(bb, id))
@@ -2984,11 +2986,11 @@ void ImGui::TableHeader(const char* label)
     // Render clipped label. Clipping here ensure that in the majority of situations, all our header cells will
     // be merged into a single draw call.
     //window->DrawList->AddCircleFilled(ImVec2(ellipsis_max, label_pos.y), 40, IM_COL32_WHITE);
-    RenderTextEllipsis(window->DrawList, label_pos, ImVec2(ellipsis_max, label_pos.y + label_height + g.Style.FramePadding.y), ellipsis_max, ellipsis_max, label, label_end, &label_size);
+    RenderTextEllipsis(window->DrawList, label_pos, ImVec2(ellipsis_max, label_pos.y + label_height + g.Style.FramePadding.y), ellipsis_max, ellipsis_max, label, &label_size);
 
     const bool text_clipped = label_size.x > (ellipsis_max - label_pos.x);
     if (text_clipped && hovered && g.HoveredIdNotActiveTimer > g.TooltipSlowDelay)
-        SetTooltip("%.*s", (int)(label_end - label), label);
+        SetTooltip("%.*s", (int)(label.End - label.Begin), label.Begin);
 
     // We don't use BeginPopupContextItem() because we want the popup to stay up even after the column is hidden
     if (IsMouseReleased(1) && IsItemHovered())
@@ -3810,7 +3812,7 @@ ImGuiOldColumns* ImGui::FindOrCreateColumns(ImGuiWindow* window, ImGuiID id)
     return columns;
 }
 
-ImGuiID ImGui::GetColumnsID(const char* str_id, int columns_count)
+ImGuiID ImGui::GetColumnsID(ImStrv str_id, int columns_count)
 {
     ImGuiWindow* window = GetCurrentWindow();
 
@@ -3823,7 +3825,7 @@ ImGuiID ImGui::GetColumnsID(const char* str_id, int columns_count)
     return id;
 }
 
-void ImGui::BeginColumns(const char* str_id, int columns_count, ImGuiOldColumnFlags flags)
+void ImGui::BeginColumns(ImStrv str_id, int columns_count, ImGuiOldColumnFlags flags)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = GetCurrentWindow();
@@ -4031,7 +4033,7 @@ void ImGui::EndColumns()
     window->DC.CursorPos.x = IM_FLOOR(window->Pos.x + window->DC.Indent.x + window->DC.ColumnsOffset.x);
 }
 
-void ImGui::Columns(int columns_count, const char* id, bool border)
+void ImGui::Columns(int columns_count, ImStrv id, bool border)
 {
     ImGuiWindow* window = GetCurrentWindow();
     IM_ASSERT(columns_count >= 1);

misc/debuggers/imgui.natvis

@@ -51,6 +51,11 @@ More information at: https://docs.microsoft.com/en-us/visualstudio/debugger/crea
   </Expand>
 </Type>
 
+<!-- String view (non zero-terminated begin/end pair) -->
+<Type Name="ImStrv">
+  <DisplayString>{Begin,[End-Begin]s} ({End-Begin,d})</DisplayString>
+</Type>
+
 <Type Name="ImGuiWindow">
   <DisplayString>{{Name {Name,s} Active {(Active||WasActive)?1:0,d} Child {(Flags &amp; 0x01000000)?1:0,d} Popup {(Flags &amp; 0x04000000)?1:0,d} Hidden {(Hidden)?1:0,d}}</DisplayString>
 </Type>

misc/fonts/binary_to_compressed_c.cpp

@@ -15,7 +15,7 @@
 // You can also find a precompiled Windows binary in the binary/demo package available from https://github.com/ocornut/imgui
 
 // Usage:
-//   binary_to_compressed_c.exe [-base85] [-nocompress] <inputfile> <symbolname>
+//   binary_to_compressed_c.exe [-base85] [-nocompress] [-nostatic] <inputfile> <symbolname>
 // Usage example:
 //   # binary_to_compressed_c.exe myfont.ttf MyFont > myfont.cpp
 //   # binary_to_compressed_c.exe -base85 myfont.ttf MyFont > myfont.cpp
@@ -31,23 +31,25 @@ typedef unsigned int stb_uint;
 typedef unsigned char stb_uchar;
 stb_uint stb_compress(stb_uchar* out, stb_uchar* in, stb_uint len);
 
-static bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_base85_encoding, bool use_compression);
+static bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_base85_encoding, bool use_compression, bool use_static);
 
 int main(int argc, char** argv)
 {
     if (argc < 3)
     {
-        printf("Syntax: %s [-base85] [-nocompress] <inputfile> <symbolname>\n", argv[0]);
+        printf("Syntax: %s [-base85] [-nocompress] [-nostatic] <inputfile> <symbolname>\n", argv[0]);
         return 0;
     }
 
     int argn = 1;
     bool use_base85_encoding = false;
     bool use_compression = true;
-    if (argv[argn][0] == '-')
+    bool use_static = true;
+    while (argn < (argc - 2) && argv[argn][0] == '-')
     {
         if (strcmp(argv[argn], "-base85") == 0) { use_base85_encoding = true; argn++; }
         else if (strcmp(argv[argn], "-nocompress") == 0) { use_compression = false; argn++; }
+        else if (strcmp(argv[argn], "-nostatic") == 0) { use_static = false; argn++; }
         else
         {
             fprintf(stderr, "Unknown argument: '%s'\n", argv[argn]);
@@ -55,7 +57,7 @@ int main(int argc, char** argv)
         }
     }
 
-    bool ret = binary_to_compressed_c(argv[argn], argv[argn + 1], use_base85_encoding, use_compression);
+    bool ret = binary_to_compressed_c(argv[argn], argv[argn + 1], use_base85_encoding, use_compression, use_static);
     if (!ret)
         fprintf(stderr, "Error opening or reading file: '%s'\n", argv[argn]);
     return ret ? 0 : 1;
@@ -67,7 +69,7 @@ char Encode85Byte(unsigned int x)
     return (x >= '\\') ? x + 1 : x;
 }
 
-bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_base85_encoding, bool use_compression)
+bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_base85_encoding, bool use_compression, bool use_static)
 {
     // Read file
     FILE* f = fopen(filename, "rb");
@@ -90,10 +92,11 @@ bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_b
     FILE* out = stdout;
     fprintf(out, "// File: '%s' (%d bytes)\n", filename, (int)data_sz);
     fprintf(out, "// Exported using binary_to_compressed_c.cpp\n");
+    const char* static_str = use_static ? "static " : "";
     const char* compressed_str = use_compression ? "compressed_" : "";
     if (use_base85_encoding)
     {
-        fprintf(out, "static const char %s_%sdata_base85[%d+1] =\n    \"", symbol, compressed_str, (int)((compressed_sz + 3) / 4)*5);
+        fprintf(out, "%sconst char %s_%sdata_base85[%d+1] =\n    \"", static_str, symbol, compressed_str, (int)((compressed_sz + 3) / 4)*5);
         char prev_c = 0;
         for (int src_i = 0; src_i < compressed_sz; src_i += 4)
         {
@@ -112,8 +115,8 @@ bool binary_to_compressed_c(const char* filename, const char* symbol, bool use_b
     }
     else
     {
-        fprintf(out, "static const unsigned int %s_%ssize = %d;\n", symbol, compressed_str, (int)compressed_sz);
+        fprintf(out, "%sconst unsigned int %s_%ssize = %d;\n", static_str, symbol, compressed_str, (int)compressed_sz);
-        fprintf(out, "static const unsigned int %s_%sdata[%d/4] =\n{", symbol, compressed_str, (int)((compressed_sz + 3) / 4)*4);
+        fprintf(out, "%sconst unsigned int %s_%sdata[%d/4] =\n{", static_str, symbol, compressed_str, (int)((compressed_sz + 3) / 4)*4);
         int column = 0;
         for (int i = 0; i < compressed_sz; i += 4)
         {