InputText: renamed namespace from stb_texture structure and added an indirection.

Author: ocornut

imgui_internal.h

@@ -216,6 +216,8 @@ namespace ImStb
 
 } // namespace ImStb
 
+typedef ImStb::STB_TexteditState ImStbTexteditState;
+
 //-----------------------------------------------------------------------------
 // [SECTION] Macros
 //-----------------------------------------------------------------------------
@@ -1110,11 +1112,13 @@ struct IMGUI_API ImGuiInputTextDeactivatedState
     ImGuiInputTextDeactivatedState()    { memset(this, 0, sizeof(*this)); }
     void    ClearFreeMemory()           { ID = 0; TextA.clear(); }
 };
+
 // Internal state of the currently focused/edited text input box
 // For a given item ID, access with ImGui::GetInputTextState()
 struct IMGUI_API ImGuiInputTextState
 {
     ImGuiContext*           Ctx;                    // parent UI context (needs to be set explicitly by parent).
+    ImStbTexteditState*     Stb;                    // State for stb_textedit.h
     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.
@@ -1123,7 +1127,7 @@ struct IMGUI_API ImGuiInputTextState
     bool                    TextAIsValid;           // temporary UTF8 buffer is not initially valid before we make the widget active (until then we pull the data from user argument)
     int                     BufCapacityA;           // end-user buffer capacity
     ImVec2                  Scroll;                 // horizontal offset (managed manually) + vertical scrolling (pulled from child window's own Scroll.y)
-    ImStb::STB_TexteditState Stb;                   // state for stb_textedit.h
+
     float                   CursorAnim;             // timer for cursor blink, reset on every user action so the cursor reappears immediately
     bool                    CursorFollow;           // set when we want scrolling to follow the current cursor position (not always!)
     bool                    SelectedAllMouseLock;   // after a double-click to select all, we ignore further mouse drags to update selection
@@ -1133,30 +1137,29 @@ struct IMGUI_API ImGuiInputTextState
     int                     ReloadSelectionStart;   // POSITIONS ARE IN IMWCHAR units *NOT* UTF-8 this is why this is not exposed yet.
     int                     ReloadSelectionEnd;
 
-    ImGuiInputTextState()                   { memset(this, 0, sizeof(*this)); }
+    ImGuiInputTextState();
+    ~ImGuiInputTextState();
     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; }
-    int         GetRedoAvailCount() const   { return IMSTB_TEXTEDIT_UNDOSTATECOUNT - Stb.undostate.redo_point; }
     void        OnKeyPressed(int key);      // Cannot be inline because we call in code in stb_textedit.h implementation
 
     // Cursor & Selection
     void        CursorAnimReset()           { CursorAnim = -0.30f; }                                   // After a user-input the cursor stays on for a while without blinking
-    void        CursorClamp()               { Stb.cursor = ImMin(Stb.cursor, CurLenW); Stb.select_start = ImMin(Stb.select_start, CurLenW); Stb.select_end = ImMin(Stb.select_end, CurLenW); }
-    bool        HasSelection() const        { return Stb.select_start != Stb.select_end; }
-    void        ClearSelection()            { Stb.select_start = Stb.select_end = Stb.cursor; }
-    int         GetCursorPos() const        { return Stb.cursor; }
-    int         GetSelectionStart() const   { return Stb.select_start; }
-    int         GetSelectionEnd() const     { return Stb.select_end; }
-    void        SelectAll()                 { Stb.select_start = 0; Stb.cursor = Stb.select_end = CurLenW; Stb.has_preferred_x = 0; }
+    void        CursorClamp()               { Stb->cursor = ImMin(Stb->cursor, CurLenW); Stb->select_start = ImMin(Stb->select_start, CurLenW); Stb->select_end = ImMin(Stb->select_end, CurLenW); }
+    bool        HasSelection() const        { return Stb->select_start != Stb->select_end; }
+    void        ClearSelection()            { Stb->select_start = Stb->select_end = Stb->cursor; }
+    int         GetCursorPos() const        { return Stb->cursor; }
+    int         GetSelectionStart() const   { return Stb->select_start; }
+    int         GetSelectionEnd() const     { return Stb->select_end; }
+    void        SelectAll()                 { Stb->select_start = 0; Stb->cursor = Stb->select_end = CurLenW; Stb->has_preferred_x = 0; }
 
     // Reload user buf (WIP #2890)
     // If you modify underlying user-passed const char* while active you need to call this (InputText V2 may lift this)
     //   strcpy(my_buf, "hello");
     //   if (ImGuiInputTextState* state = ImGui::GetInputTextState(id)) // id may be ImGui::GetItemID() is last item
     //       state->ReloadUserBufAndSelectAll();
     void        ReloadUserBufAndSelectAll()     { ReloadUserBuf = true; ReloadSelectionStart = 0; ReloadSelectionEnd = INT_MAX; }
-    void        ReloadUserBufAndKeepSelection() { ReloadUserBuf = true; ReloadSelectionStart = Stb.select_start; ReloadSelectionEnd = Stb.select_end; }
+    void        ReloadUserBufAndKeepSelection() { ReloadUserBuf = true; ReloadSelectionStart = Stb->select_start; ReloadSelectionEnd = Stb->select_end; }
     void        ReloadUserBufAndMoveToEnd()     { ReloadUserBuf = true; ReloadSelectionStart = ReloadSelectionEnd = INT_MAX; }
 
 };