mac: Add support for asynchronous dictionary lookup

content/renderer/text_input_client_observer.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 "content/renderer/text_input_client_observer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "content/common/text_input_client_messages.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/render_view_impl.h"
@@ skipping 11 matching lines @@
     : RenderViewObserver(render_view),
       render_view_impl_(render_view) {
 }
 
 TextInputClientObserver::~TextInputClientObserver() {
 }
 
 bool TextInputClientObserver::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(TextInputClientObserver, message)
+    IPC_MESSAGE_HANDLER(TextInputClientMsg_StringAtPoint,
+                        OnStringAtPoint)
     IPC_MESSAGE_HANDLER(TextInputClientMsg_CharacterIndexForPoint,
                         OnCharacterIndexForPoint)
     IPC_MESSAGE_HANDLER(TextInputClientMsg_FirstRectForCharacterRange,
                         OnFirstRectForCharacterRange)
     IPC_MESSAGE_HANDLER(TextInputClientMsg_StringForRange, OnStringForRange)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 blink::WebView* TextInputClientObserver::webview() {
   return render_view()->GetWebView();
 }
 
+void TextInputClientObserver::OnStringAtPoint(gfx::Point point) {
+#if defined(OS_MACOSX)
+  blink::WebPoint baselinePoint;
+  NSAttributedString* string = blink::WebSubstringUtil::attributedWordAtPoint(
+      webview(), point, baselinePoint);
+
+  scoped_ptr<const mac::AttributedStringCoder::EncodedString> encoded(
+      mac::AttributedStringCoder::Encode(string));
+  Send(new TextInputClientReplyMsg_GotStringAtPoint(
+      routing_id(), *encoded.get(), baselinePoint));
+#else
+  NOTIMPLEMENTED();
+#endif
+}
+
 void TextInputClientObserver::OnCharacterIndexForPoint(gfx::Point point) {
   blink::WebPoint web_point(point);
   size_t index = webview()->focusedFrame()->characterIndexForPoint(web_point);
   Send(new TextInputClientReplyMsg_GotCharacterIndexForPoint(routing_id(),
       index));
 }
 
 void TextInputClientObserver::OnFirstRectForCharacterRange(gfx::Range range) {
   gfx::Rect rect;
 #if defined(ENABLE_PLUGINS)
@@ skipping 24 matching lines @@
   scoped_ptr<const mac::AttributedStringCoder::EncodedString> encoded(
       mac::AttributedStringCoder::Encode(string));
   Send(new TextInputClientReplyMsg_GotStringForRange(routing_id(),
       *encoded.get()));
 #else
   NOTIMPLEMENTED();
 #endif
 }
 
 }  // namespace content