Support a private event - inputMethodPrivate.onCompositionBoundsChanged so that component IME exten…

ui/base/ime/input_method_chromeos.cc

 // Copyright 2014 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_chromeos.h"
 
 #include <algorithm>
 #include <cstring>
 #include <set>
 #include <vector>
@@ skipping 166 matching lines @@
 void InputMethodChromeOS::OnCaretBoundsChanged(const TextInputClient* client) {
   if (!IsInputFieldFocused() || !IsTextInputClientFocused(client))
     return;
 
   NotifyTextInputCaretBoundsChanged(client);
 
   if (!IsNonPasswordInputFieldFocused())
     return;
 
   // The current text input type should not be NONE if |context_| is focused.
+  DCHECK(client == GetTextInputClient());
   DCHECK(!IsTextInputTypeNone());
-  const gfx::Rect rect = GetTextInputClient()->GetCaretBounds();
+  const gfx::Rect rect = client->GetCaretBounds();
 
   gfx::Rect composition_head;
-  if (!GetTextInputClient()->GetCompositionCharacterBounds(0,
-                                                           &composition_head)) {
+  if (client->GetCompositionCharacterBounds(0, &composition_head)) {
+    if (GetEngine())
+      GetEngine()->SetCompositionBounds(composition_head);
+  } else {
     composition_head = rect;
   }
 
   chromeos::IMECandidateWindowHandlerInterface* candidate_window =
       chromeos::IMEBridge::Get()->GetCandidateWindowHandler();
   if (!candidate_window)
     return;
   candidate_window->SetCursorBounds(rect, composition_head);
 
   gfx::Range text_range;
   gfx::Range selection_range;
   base::string16 surrounding_text;
-  if (!GetTextInputClient()->GetTextRange(&text_range) ||
-      !GetTextInputClient()->GetTextFromRange(text_range, &surrounding_text) ||
-      !GetTextInputClient()->GetSelectionRange(&selection_range)) {
+  if (!client->GetTextRange(&text_range) ||
+      !client->GetTextFromRange(text_range, &surrounding_text) ||
+      !client->GetSelectionRange(&selection_range)) {
     previous_surrounding_text_.clear();
     previous_selection_range_ = gfx::Range::InvalidRange();
     return;
   }
 
   if (previous_selection_range_ == selection_range &&
       previous_surrounding_text_ == surrounding_text)
     return;
 
   previous_selection_range_ = selection_range;
@@ skipping 444 matching lines @@
 bool InputMethodChromeOS::IsNonPasswordInputFieldFocused() {
   TextInputType type = GetTextInputType();
   return (type != TEXT_INPUT_TYPE_NONE) && (type != TEXT_INPUT_TYPE_PASSWORD);
 }
 
 bool InputMethodChromeOS::IsInputFieldFocused() {
   return GetTextInputType() != TEXT_INPUT_TYPE_NONE;
 }
 
 }  // namespace ui