InputText: amends: remove TextAIsValid. (7925)

imgui_internal.h

@@ -1130,7 +1130,6 @@ struct IMGUI_API ImGuiInputTextState
     int                     CurLenA;                // UTF-8 length of the string in TextA (in bytes)
     ImVector<char>          TextA;                  // temporary UTF8 buffer for callbacks and other operations. this is not updated in every code-path! size=capacity.
     ImVector<char>          InitialTextA;           // value to revert to when pressing Escape = backup of end-user buffer at the time of focus (in UTF-8, unaltered)
-    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

imgui_widgets.cpp

@@ -4447,13 +4447,12 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         // Preserve cursor position and undo/redo stack if we come back to same widget
         // FIXME: Since we reworked this on 2022/06, may want to differentiate recycle_cursor vs recycle_undostate?
         bool recycle_state = (state->ID == id && !init_changed_specs && !init_reload_from_user_buf);
-        if (recycle_state && (state->CurLenA != buf_len || (state->TextAIsValid && strncmp(state->TextA.Data, buf, buf_len) != 0)))
+        if (recycle_state && (state->CurLenA != buf_len || (strncmp(state->TextA.Data, buf, buf_len) != 0)))
             recycle_state = false;
 
         // Start edition
         state->ID = id;
         state->TextA.resize(buf_size + 1);          // we use +1 to make sure that .Data is always pointing to at least an empty string.
-        state->TextAIsValid = true;
         state->CurLenA = (int)strlen(buf);
         memcpy(state->TextA.Data, buf, state->CurLenA + 1);
 
@@ -4538,7 +4537,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
     bool validated = false;
 
     // Select the buffer to render.
-    const bool buf_display_from_state = (render_cursor || render_selection || g.ActiveId == id) && !is_readonly && state && state->TextAIsValid;
+    const bool buf_display_from_state = (render_cursor || render_selection || g.ActiveId == id) && !is_readonly && state;
     const bool is_displaying_hint = (hint != NULL && (buf_display_from_state ? state->TextA.Data : buf)[0] == 0);
 
     // Password pushes a temporary font with only a fallback glyph