Implement "Look Up In Dictionary" context menu item asynchronously. (OS X)

content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.mm

 // Copyright 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.
 
 #import "content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.h"
 
 #include "base/strings/sys_string_conversions.h"
 #import "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 namespace content {
 
 RenderWidgetHostViewMacDictionaryHelper::
     RenderWidgetHostViewMacDictionaryHelper(RenderWidgetHostView* view)
     : view_(static_cast<RenderWidgetHostViewMac*>(view)),
       target_view_(static_cast<RenderWidgetHostViewMac*>(view)) {
 }
 
 void RenderWidgetHostViewMacDictionaryHelper::SetTargetView(
     RenderWidgetHostView* target_view) {
   target_view_ = static_cast<RenderWidgetHostViewMac*>(target_view);
 }
 
 void RenderWidgetHostViewMacDictionaryHelper::ShowDefinitionForSelection() {
   NSRange selection_range = [view_->cocoa_view() selectedRange];
-  NSAttributedString* attr_string =
-      [view_->cocoa_view() attributedSubstringForProposedRange:selection_range
-                                                   actualRange:nil];
-  if (!attr_string) {
-    if (view_->selected_text().empty())
-      return;
-    // The PDF plugin does not support getting the attributed string. Until it
-    // does, use NSPerformService(), which opens Dictionary.app.
-    // http://crbug.com/152438
-    // TODO(asvitkine): This should be removed after the above support is added.
-    NSString* text = base::SysUTF8ToNSString(view_->selected_text());
-    NSPasteboard* pasteboard = [NSPasteboard pasteboardWithUniqueName];
-    NSArray* types = [NSArray arrayWithObject:NSStringPboardType];
-    [pasteboard declareTypes:types owner:nil];
-    if ([pasteboard setString:text forType:NSStringPboardType])
-      NSPerformService(@"Look Up in Dictionary", pasteboard);
-    return;
-  }
-
-  NSRect rect =
-      [view_->cocoa_view() firstViewRectForCharacterRange:selection_range
-                                              actualRange:nil];
-
-  NSDictionary* attrs = [attr_string attributesAtIndex:0 effectiveRange:nil];
-  NSFont* font = [attrs objectForKey:NSFontAttributeName];
-  rect.origin.y += NSHeight(rect) - [font ascender];
-
-  rect.origin.x += offset_.x();
-  rect.origin.y += offset_.y();
-
-  [target_view_->cocoa_view() showDefinitionForAttributedString:attr_string
-                                                        atPoint:rect.origin];
+  [view_->cocoa_view() showLookUpDictionaryOverlayFromRange:selection_range];
 }
 
 }  // namespace content