Implement chrome.input.ime.setComposition/commitText API.

ui/base/ime/input_method_win.cc

 // Copyright (c) 2012 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.
 
 #include "ui/base/ime/input_method_win.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/auto_reset.h"
@@ skipping 160 matching lines @@
 
   // Dispatches the key events to the Chrome IME extension which is listening to
   // key events on the following two situations:
   // 1) |char_msgs| is empty when the event is non-character key.
   // 2) |char_msgs|.size() == 1 when the event is character key and the WM_CHAR
   // messages have been combined in the event processing flow.
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableMergeKeyCharEvents) &&
       char_msgs.size() <= 1 && GetEngine() &&
       GetEngine()->IsInterestedInKeyEvent()) {
+    // Make true that we don't handle IME API calling of setComposition and
+    // commitText while the extension is processing key event.
+    handling_key_event_ = true;
     ui::IMEEngineHandlerInterface::KeyEventDoneCallback callback = base::Bind(
         &InputMethodWin::ProcessKeyEventDone, weak_ptr_factory_.GetWeakPtr(),
         base::Owned(new ui::KeyEvent(*event)),
         base::Owned(new std::vector<MSG>(char_msgs)));
     GetEngine()->ProcessKeyEvent(*event, callback);
   } else {
     ProcessKeyEventDone(event, &char_msgs, false);
   }
 }
 
 void InputMethodWin::ProcessKeyEventDone(ui::KeyEvent* event,
                                          const std::vector<MSG>* char_msgs,
                                          bool is_handled) {
+  handling_key_event_ = false;
   DCHECK(event);
   if (is_handled)
     return;
 
   ui::EventDispatchDetails details = DispatchKeyEventPostIME(event);
   if (details.dispatcher_destroyed || details.target_destroyed ||
       event->stopped_propagation()) {
     return;
   }
 
@@ skipping 474 matching lines @@
     if (old_text_input_type != ui::TEXT_INPUT_TYPE_NONE)
       engine->FocusOut();
     if (text_input_type != ui::TEXT_INPUT_TYPE_NONE)
       engine->FocusIn(context);
 
     ui::IMEBridge::Get()->SetCurrentInputContext(context);
   }
 }
 
 }  // namespace ui