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Make ImGuiInputTextState not depend on the implicit GImGui context. (#5856)

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This commit is a preparation toward adding ImGui apis with explicit context
and making ImGui applications being able to use multiple context at the same time
whatever their concurrency model.
--
Prior to this commit ImGuiInputTextState::OnKeyPressed was depending on the
global context to know which font and font size to use, and if it should
follow MacOSX behaviors or not (c.f ConfigMacOSXBehaviors).

Instead of using the global context, this commit store the context as
attribute of ImGuiInputTextState. Since this state is forwarded to most
of text edit related function, it possible to access font, font size and
ConfigMacOSXBehaviors from everywhere.

NOTE: I have noticed a bug prior to that commit: if the font or font size
change while editing the same widget, the ImGuiInputTextState become invalid
and there is no code to handle this invalidation. Fixing this bug is out
of scope of current pull request.

# Conflicts:
#	imgui_internal.h
This commit is contained in:
Marc Delorme
2022-11-01 21:56:10 +09:00
committed by ocornut
parent 45736443be
commit a5e96ff99e
2 changed files with 12 additions and 10 deletions
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4
imgui_internal.h
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@ -1051,6 +1051,7 @@ struct IMGUI_API ImGuiMenuColumns
// For a given item ID, access with ImGui::GetInputTextState()
struct IMGUI_API ImGuiInputTextState
{
ImGuiContext* Ctx; // parent dear imgui context
ImGuiID ID; // widget id owning the text state
int CurLenW, CurLenA; // we need to maintain our buffer length in both UTF-8 and wchar format. UTF-8 length is valid even if TextA is not.
ImVector<ImWchar> TextW; // edit buffer, we need to persist but can't guarantee the persistence of the user-provided buffer. so we copy into own buffer.
@ -1066,7 +1067,7 @@ struct IMGUI_API ImGuiInputTextState
bool Edited; // edited this frame
ImGuiInputTextFlags Flags; // copy of InputText() flags. may be used to check if e.g. ImGuiInputTextFlags_Password is set.
ImGuiInputTextState() { memset(this, 0, sizeof(*this)); }
ImGuiInputTextState(ImGuiContext* ctx) { memset(this, 0, sizeof(*this)); Ctx = ctx;}
void ClearText() { CurLenW = CurLenA = 0; TextW[0] = 0; TextA[0] = 0; CursorClamp(); }
void ClearFreeMemory() { TextW.clear(); TextA.clear(); InitialTextA.clear(); }
int GetUndoAvailCount() const { return Stb.undostate.undo_point; }
@ -2014,6 +2015,7 @@ struct ImGuiContext
ImVector<char> TempBuffer; // Temporary text buffer
ImGuiContext(ImFontAtlas* shared_font_atlas)
: InputTextState(this)
{
Initialized = false;
FontAtlasOwnedByContext = shared_font_atlas ? false : true;