Merge branch 'viewport' into docking

# Conflicts:
#	imgui.cpp
#	imgui_widgets.cpp

docs/CHANGELOG.txt

@@ -86,7 +86,7 @@ Other Changes:
   introduced in 1.50 and broken in 1.60. (#1698, #894, #713).
 - TextUnformatted(): Fixed a case where large-text path would read bytes past the text_end marker depending
   on the position of new lines in the buffer (it wasn't affecting the output but still not the right thing to do!) 
-- InputTextMultiline(), RenderText(): Some optimization for very large text buffers, useful for non-optimized builds.
+- RenderText(): Some optimization for very large text buffers, useful for non-optimized builds.
 - BeginMenu(): Fixed menu popup horizontal offset being off the item in the menu bar when WindowPadding=0.0f.
 - ArrowButton(): Fixed arrow shape being horizontally misaligned by (FramePadding.y-FramePadding.x) if they are different.
 - Drag and Drop: Added GetDragDropPayload() to peek directly into the payload (if any) from anywhere. (#143)

imgui.cpp

@@ -863,21 +863,21 @@ CODE
 
 #include <ctype.h>      // toupper, isprint
 #include <stdio.h>      // vsnprintf, sscanf, printf
-#include <wchar.h>      // wcslen
 #if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
 #include <stddef.h>     // intptr_t
 #else
 #include <stdint.h>     // intptr_t
 #endif
 
+// Debug options
 #define IMGUI_DEBUG_NAV_SCORING     0   // Display navigation scoring preview when hovering items. Display last moving direction matches when holding CTRL
 #define IMGUI_DEBUG_NAV_RECTS       0   // Display the reference navigation rectangle for each window
 #define IMGUI_DEBUG_DOCKING_INI     0   // Save additional comments in .ini file (makes saving slower)
 
 // Visual Studio warnings
 #ifdef _MSC_VER
-#pragma warning (disable: 4127) // condition expression is constant
-#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
+#pragma warning (disable: 4127)     // condition expression is constant
+#pragma warning (disable: 4996)     // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
 #endif
 
 // Clang/GCC warnings with -Weverything
@@ -972,6 +972,14 @@ static int              FindPlatformMonitorForRect(const ImRect& r);
 
 }
 
+// Test engine hooks (imgui-test)
+//#define IMGUI_ENABLE_TEST_ENGINE_HOOKS
+#ifdef IMGUI_ENABLE_TEST_ENGINE_HOOKS
+extern void             ImGuiTestEngineHook_PreNewFrame();
+extern void             ImGuiTestEngineHook_PostNewFrame();
+extern void             ImGuiTestEngineHook_ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg);
+#endif
+
 //-----------------------------------------------------------------------------
 // [SECTION] CONTEXT AND MEMORY ALLOCATORS
 //-----------------------------------------------------------------------------
@@ -1235,7 +1243,10 @@ const char* ImStrchrRange(const char* str, const char* str_end, char c)
 
 int ImStrlenW(const ImWchar* str)
 {
-    return (int)wcslen((const wchar_t*)str);
+    //return (int)wcslen((const wchar_t*)str);	// FIXME-OPT: Could use this when wchar_t are 16-bits
+    int n = 0;
+    while (*str++) n++;
+    return n;
 }
 
 // Find end-of-line. Return pointer will point to either first \n, either str_end.
@@ -2640,6 +2651,10 @@ void ImGui::ItemSize(const ImRect& bb, float text_offset_y)
 // declare their minimum size requirement to ItemSize() and then use a larger region for drawing/interaction, which is passed to ItemAdd().
 bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg)
 {
+#ifdef IMGUI_ENABLE_TEST_ENGINE_HOOKS
+    ImGuiTestEngineHook_ItemAdd(bb, id, nav_bb_arg);
+#endif
+
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
 
@@ -3219,6 +3234,10 @@ void ImGui::NewFrame()
     IM_ASSERT(GImGui != NULL && "No current context. Did you call ImGui::CreateContext() or ImGui::SetCurrentContext()?");
     ImGuiContext& g = *GImGui;
 
+#ifdef IMGUI_ENABLE_TEST_ENGINE_HOOKS
+    ImGuiTestEngineHook_PreNewFrame();
+#endif
+
     // Check user data
     // (We pass an error message in the assert expression to make it visible to programmers who are not using a debugger, as most assert handlers display their argument)
     IM_ASSERT(g.Initialized);
@@ -3435,6 +3454,10 @@ void ImGui::NewFrame()
     // We don't use "Debug" to avoid colliding with user trying to create a "Debug" window with custom flags.
     SetNextWindowSize(ImVec2(400,400), ImGuiCond_FirstUseEver);
     Begin("Debug##Default");
+
+#ifdef IMGUI_ENABLE_TEST_ENGINE_HOOKS
+    ImGuiTestEngineHook_PostNewFrame();
+#endif
 }
 
 void ImGui::Initialize(ImGuiContext* context)

imgui_widgets.cpp

@@ -38,7 +38,6 @@ Index of this file:
 #include "imgui_internal.h"
 
 #include <ctype.h>      // toupper, isprint
-#include <wchar.h>      // wmemchr
 #if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
 #include <stddef.h>     // intptr_t
 #else
@@ -3641,12 +3640,14 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
             // In multi-line mode, we never exit the loop until all lines are counted, so add one extra to the searches_remaining counter.
             searches_remaining += is_multiline ? 1 : 0;
             int line_count = 0;
-            for (const ImWchar* s = text_begin; (s = (const ImWchar*)wcschr((const wchar_t*)s, (wchar_t)'\n')) != NULL; s++)
-            {
-                line_count++;
-                if (searches_result_line_number[0] == -1 && s >= searches_input_ptr[0]) { searches_result_line_number[0] = line_count; if (--searches_remaining <= 0) break; }
-                if (searches_result_line_number[1] == -1 && s >= searches_input_ptr[1]) { searches_result_line_number[1] = line_count; if (--searches_remaining <= 0) break; }
-            }
+            //for (const ImWchar* s = text_begin; (s = (const ImWchar*)wcschr((const wchar_t*)s, (wchar_t)'\n')) != NULL; s++)  // FIXME-OPT: Could use this when wchar_t are 16-bits
+            for (const ImWchar* s = text_begin; *s != 0; s++)
+                if (*s == '\n')
+                {
+                    line_count++;
+                    if (searches_result_line_number[0] == -1 && s >= searches_input_ptr[0]) { searches_result_line_number[0] = line_count; if (--searches_remaining <= 0) break; }
+                    if (searches_result_line_number[1] == -1 && s >= searches_input_ptr[1]) { searches_result_line_number[1] = line_count; if (--searches_remaining <= 0) break; }
+                }
             line_count++;
             if (searches_result_line_number[0] == -1) searches_result_line_number[0] = line_count;
             if (searches_result_line_number[1] == -1) searches_result_line_number[1] = line_count;
@@ -3714,8 +3715,11 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
                     break;
                 if (rect_pos.y < clip_rect.y)
                 {
-                    p = (const ImWchar*)wmemchr((const wchar_t*)p, '\n', text_selected_end - p);
-                    p = p ? p + 1 : text_selected_end;
+                    //p = (const ImWchar*)wmemchr((const wchar_t*)p, '\n', text_selected_end - p);  // FIXME-OPT: Could use this when wchar_t are 16-bits
+                    //p = p ? p + 1 : text_selected_end;
+                    while (p < text_selected_end)
+                        if (*p++ == '\n')
+                            break;
                 }
                 else
                 {