New method: InputMethod::IsCandidatePopupOpen()

ui/base/ime/input_method_tsf.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_BASE_IME_INPUT_METHOD_TSF_H_
 #define UI_BASE_IME_INPUT_METHOD_TSF_H_
 
 #include <windows.h>
 
 #include <string>
@@ skipping 10 matching lines @@
 
   // Overridden from InputMethod:
   virtual void OnFocus() OVERRIDE;
   virtual void OnBlur() OVERRIDE;
   virtual bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                         NativeEventResult* result) OVERRIDE;
   virtual void OnTextInputTypeChanged(const TextInputClient* client) OVERRIDE;
   virtual void OnCaretBoundsChanged(const TextInputClient* client) OVERRIDE;
   virtual void CancelComposition(const TextInputClient* client) OVERRIDE;
   virtual void SetFocusedTextInputClient(TextInputClient* client) OVERRIDE;
+  virtual bool IsPopupOpen() const OVERRIDE;
 
   // Overridden from InputMethodBase:
   virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
                                          TextInputClient* focused) OVERRIDE;
   virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
                                         TextInputClient* focused) OVERRIDE;
 
  private:
+  LRESULT OnImeNotify(UINT message,
+                      WPARAM wparam,
+                      LPARAM lparam,
+                      BOOL* handled);
+
   // Asks the client to confirm current composition text.
   void ConfirmCompositionText();
 
+  // True if a candidate window (or IME suggest, etc.) is open.
+  // False if not or unsure.
+  bool is_popup_open_;
+
   DISALLOW_COPY_AND_ASSIGN(InputMethodTSF);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_TSF_H_