[Mac] Implement the system dictionary popup by implementing NSTextInput methods.

content/renderer/render_view.cc

 // Copyright (c) 2011 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/render_view.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 2019 matching lines @@
   return true;
 #else
   return false;
 #endif
 }
 
 void RenderView::didChangeSelection(bool is_empty_selection) {
 #if defined(OS_POSIX)
   if (!handling_input_event_)
       return;
-  // TODO(estade): investigate incremental updates to the selection so that we
-  // don't send the entire selection over IPC every time.
-  if (!is_empty_selection) {
+
+  if (is_empty_selection) {
+    last_selection_.clear();
+  } else {
     // Sometimes we get repeated didChangeSelection calls from webkit when
     // the selection hasn't actually changed. We don't want to report these
     // because it will cause us to continually claim the X clipboard.
-    const std::string& this_selection =
-        webview()->focusedFrame()->selectionAsText().utf8();
+    WebFrame* frame = webview()->focusedFrame();
+    const std::string& this_selection = frame->selectionAsText().utf8();
     if (this_selection == last_selection_)
       return;
+    last_selection_ = this_selection;
+  }
 
-    Send(new ViewHostMsg_SelectionChanged(routing_id_,
-         this_selection));
-    last_selection_ = this_selection;
-  } else {
-    last_selection_.clear();
-    Send(new ViewHostMsg_SelectionChanged(routing_id_,
-         last_selection_));
+  ui::Range range(ui::Range::InvalidRange());
+  size_t location, length;
+  if (webview()->caretOrSelectionRange(&location, &length)) {
+    range.set_start(location);
+    range.set_end(location + length);
   }
+  Send(new ViewHostMsg_SelectionChanged(routing_id_, last_selection_, range));
 #endif  // defined(OS_POSIX)
 }
 
 void RenderView::didExecuteCommand(const WebString& command_name) {
   const std::string& name = UTF16ToUTF8(command_name);
   if (StartsWithASCII(name, "Move", true) ||
       StartsWithASCII(name, "Insert", true) ||
       StartsWithASCII(name, "Delete", true))
     return;
   UserMetricsRecordAction(name);
@@ skipping 2978 matching lines @@
     const webkit_glue::CustomContextMenuContext& custom_context) {
   if (custom_context.is_pepper_menu)
     pepper_delegate_.OnContextMenuClosed(custom_context);
   else
     context_menu_node_.reset();
 }
 
 void RenderView::OnNetworkStateChanged(bool online) {
   WebNetworkStateNotifier::setOnLine(online);
 }