Backends: SDL3: avoid calling SDL_StartTextInput() again if already active. (#8727)

backends/imgui_impl_sdl3.cpp

@@ -20,6 +20,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2025-06-27: IME: avoid calling SDL_StartTextInput() again if already active. (#8727)
 //  2025-04-22: IME: honor ImGuiPlatformImeData->WantTextInput as an alternative way to call SDL_StartTextInput(), without IME being necessarily visible.
 //  2025-04-09: Don't attempt to call SDL_CaptureMouse() on drivers where we don't call SDL_GetGlobalMouseState(). (#8561)
 //  2025-03-30: Update for SDL3 api changes: Revert SDL_GetClipboardText() memory ownership change. (#8530, #7801)
@@ -169,7 +170,7 @@ static void ImGui_ImplSDL3_PlatformSetImeData(ImGuiContext*, ImGuiViewport* view
         SDL_SetTextInputArea(window, &r, 0);
         bd->ImeWindow = window;
     }
-    if (data->WantVisible || data->WantTextInput)
+    if (!SDL_TextInputActive(window) && (data->WantVisible || data->WantTextInput))
         SDL_StartTextInput(window);
 }
 

docs/CHANGELOG.txt

@@ -43,6 +43,8 @@ Breaking changes:
 
 Other changes:
 
+- Backends: SDL3: avoid calling SDL_StartTextInput() again if already active.
+  (#8727) [@morrazzzz]
 - Backends: OSX: added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress
   mouse cursor support. (#8739) [@cfillion]
 - Backends: Vulkan: use nonCoherentAtomSize to align upload_size, fixing