New method: InputMethod::IsCandidatePopupOpen()

ui/base/ime/input_method_imm32.h

 // Copyright (c) 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_IMM32_H_
 #define UI_BASE_IME_INPUT_METHOD_IMM32_H_
 
 #include <windows.h>
 
 #include <string>
@@ skipping 12 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 IsCandidatePopupOpen() const OVERRIDE;
 
  protected:
   // Overridden from InputMethodBase:
   virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
                                          TextInputClient* focused) OVERRIDE;
   virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
                                         TextInputClient* focused) OVERRIDE;
 
  private:
   LRESULT OnImeSetContext(HWND window_handle,
                           UINT message,
                           WPARAM wparam,
                           LPARAM lparam,
                           BOOL* handled);
   LRESULT OnImeStartComposition(HWND window_handle,
                                 UINT message,
                                 WPARAM wparam,
                                 LPARAM lparam,
                                 BOOL* handled);
   LRESULT OnImeComposition(HWND window_handle,
                            UINT message,
                            WPARAM wparam,
                            LPARAM lparam,
                            BOOL* handled);
   LRESULT OnImeEndComposition(HWND window_handle,
                               UINT message,
                               WPARAM wparam,
                               LPARAM lparam,
                               BOOL* handled);
+  LRESULT OnImeNotify(UINT message,
+                      WPARAM wparam,
+                      LPARAM lparam,
+                      BOOL* handled);
 
   // Asks the client to confirm current composition text.
   void ConfirmCompositionText();
 
   // Enables or disables the IME according to the current text input type.
   void UpdateIMEState();
 
   // Returns true if the Win32 native window bound to |client| has Win32 input
   // focus.
   bool IsWindowFocused(const TextInputClient* client) const;
 
   bool enabled_;
 
+  // True if we know for sure that a candidate window is open.
+  bool is_candidate_popup_open_;
+
   // Window handle where composition is on-going. NULL when there is no
   // composition.
   HWND composing_window_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodIMM32);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_IMM32_H_