InputText: Internal: ReloadUserBufXXX functions don't override revert value. (#2890) + rename

imgui_internal.h

@@ -1069,7 +1069,7 @@ struct IMGUI_API ImGuiInputTextState
     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.
     ImVector<char>          TextA;                  // temporary UTF8 buffer for callbacks and other operations. this is not updated in every code-path! size=capacity.
-    ImVector<char>          InitialTextA;           // backup of end-user buffer at the time of focus (in UTF-8, unaltered)
+    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
     float                   ScrollX;                // horizontal scrolling/offset

imgui_widgets.cpp

@@ -4199,11 +4199,14 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         // Backup state of deactivating item so they'll have a chance to do a write to output buffer on the same frame they report IsItemDeactivatedAfterEdit (#4714)
         InputTextDeactivateHook(state->ID);
 
-        // Take a copy of the initial buffer value (both in original UTF-8 format and converted to wchar)
-        // From the moment we focused we are ignoring the content of 'buf' (unless we are in read-only mode)
+        // From the moment we focused we are normally ignoring the content of 'buf' (unless we are in read-only mode)
         const int buf_len = (int)strlen(buf);
+        //if (!init_reload_from_user_buf)
+        {
+            // Take a copy of the initial buffer value.
             state->InitialTextA.resize(buf_len + 1);    // UTF-8. we use +1 to make sure that .Data is always pointing to at least an empty string.
             memcpy(state->InitialTextA.Data, buf, buf_len + 1);
+        }
 
         // 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?