Add wchar32 and disable-obsolete flags (#127)

dear-imgui.cabal

@@ -24,7 +24,7 @@ extra-source-files:
   imgui/imconfig.h,
   imgui/LICENSE.txt
 
-common build-flags
+common exe-flags
   if flag(debug)
     if os(linux)
       ghc-options: -Wall -g -rtsopts -dcore-lint -debug
@@ -50,7 +50,6 @@ common build-flags
       ghc-options: -Wall -O2
       cc-options: -O2
 
-
 source-repository head
   type: git
   location: https://github.com/haskell-game/dear-imgui.hs
@@ -111,6 +110,22 @@ flag examples
   manual:
     True
 
+flag disable-obsolete
+  description:
+    Don't define obsolete functions/enums/behaviors. Consider enabling from time to time after updating to avoid using soon-to-be obsolete function/names.
+  default:
+    False
+  manual:
+    True
+
+flag use-wchar32
+  description:
+    Use 32-bit for ImWchar (default is 16-bit) to support unicode planes 1-16. (e.g. point beyond 0xFFFF like emoticons, dingbats, symbols, shapes, ancient languages, etc...)
+  default:
+    True
+  manual:
+    True
+
 common common
   build-depends:
       base
@@ -157,6 +172,13 @@ library
     , unliftio
     , vector
 
+  if flag(disable-obsolete)
+    cxx-options: -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS
+
+  if flag(use-wchar32)
+    cxx-options: -DIMGUI_USE_WCHAR32
+    cpp-options: -DIMGUI_USE_WCHAR32
+
   if flag(opengl2)
     exposed-modules:
       DearImGui.OpenGL2
@@ -273,7 +295,7 @@ library dear-imgui-generator
         >= 0.2.11 && < 0.3
 
 executable test
-  import: common, build-flags
+  import: common, exe-flags
   main-is: Main.hs
   default-language: Haskell2010
   if (!flag(examples) || !flag(sdl) || !flag(opengl2))
@@ -282,7 +304,7 @@ executable test
     build-depends: base, sdl2, gl, dear-imgui, vector
 
 executable glfw
-  import: common, build-flags
+  import: common, exe-flags
   main-is: Main.hs
   hs-source-dirs: examples/glfw
   default-language: Haskell2010
@@ -292,7 +314,7 @@ executable glfw
     build-depends: base, GLFW-b, gl, dear-imgui, managed
 
 executable readme
-  import: common, build-flags
+  import: common, exe-flags
   main-is: Readme.hs
   hs-source-dirs: examples
   build-depends: sdl2, gl, dear-imgui, managed
@@ -300,7 +322,7 @@ executable readme
     buildable: False
 
 executable fonts
-  import: common, build-flags
+  import: common, exe-flags
   main-is: Main.hs
   hs-source-dirs: examples/fonts
   build-depends: sdl2, gl, dear-imgui, managed
@@ -308,7 +330,7 @@ executable fonts
     buildable: False
 
 executable image
-  import: common, build-flags
+  import: common, exe-flags
   main-is: Image.hs
   hs-source-dirs: examples/sdl
   build-depends: sdl2, gl, dear-imgui, managed, vector
@@ -316,7 +338,7 @@ executable image
     buildable: False
 
 executable vulkan
-  import: common, build-flags
+  import: common, exe-flags
   main-is: Main.hs
   other-modules: Attachments, Backend, Input, Util
   hs-source-dirs: examples/vulkan

src/DearImGui/Structs.hs

@@ -1,11 +1,17 @@
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE CPP #-}
 
 module DearImGui.Structs where
 
 -- base
 import Data.Word
-  ( Word32, Word16 )
+  ( Word32
+#ifndef IMGUI_USE_WCHAR32
+  , Word16
+#endif
+  )
+
 import Foreign
   ( Storable(..), castPtr, plusPtr )
 
@@ -96,5 +102,8 @@ data ImGuiListClipper
 type ImU32 = Word32
 
 -- | Single wide character (used mostly in glyph management)
+#ifdef IMGUI_USE_WCHAR32
+type ImWchar = Word32
+#else
 type ImWchar = Word16
--- FIXME: consider IMGUI_USE_WCHAR32
+#endif