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

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <OpenGL/gl.h>
 #include <QuartzCore/QuartzCore.h>
 
@@ skipping 162 matching lines @@
 - (void)processedWheelEvent:(const blink::WebMouseWheelEvent&)event
                    consumed:(BOOL)consumed;
 
 - (void)keyEvent:(NSEvent*)theEvent wasKeyEquivalent:(BOOL)equiv;
 - (void)windowDidChangeBackingProperties:(NSNotification*)notification;
 - (void)windowChangedGlobalFrame:(NSNotification*)notification;
 - (void)checkForPluginImeCancellation;
 - (void)updateScreenProperties;
 - (void)setResponderDelegate:
         (NSObject<RenderWidgetHostViewMacDelegate>*)delegate;
+- (void)showLookUpDictionaryOverlayInternal:(NSAttributedString*) string
+                              baselinePoint:(NSPoint) baselinePoint;
 @end
 
 // A window subclass that allows the fullscreen window to become main and gain
 // keyboard focus. This is only used for pepper flash. Normal fullscreen is
 // handled by the browser.
 @interface PepperFlashFullscreenWindow : UnderlayOpenGLHostingWindow
 @end
 
 @implementation PepperFlashFullscreenWindow
 
@@ skipping 2232 matching lines @@
 
 - (void)smartMagnifyWithEvent:(NSEvent*)event {
   const WebGestureEvent& smartMagnifyEvent =
       WebGestureEventBuilder::Build(event, self);
   if (renderWidgetHostView_ && renderWidgetHostView_->render_widget_host_) {
     renderWidgetHostView_->render_widget_host_->ForwardGestureEvent(
         smartMagnifyEvent);
   }
 }
 
+- (void)showLookUpDictionaryOverlayInternal:(NSAttributedString*) string
+                              baselinePoint:(NSPoint) baselinePoint {
+  if ([string length] == 0) {
+    // The PDF plugin does not support getting the attributed string at point.
+    // Until it does, use NSPerformService(), which opens Dictionary.app.
+    // TODO(shuchen): Support GetStringAtPoint() & GetStringFromRange() for PDF.
+    // See crbug.com/152438.
+    NSString* text = base::SysUTF8ToNSString(
+        renderWidgetHostView_->selected_text());
+    if ([text length] == 0)
+      return;
+    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;
+  }
+  dispatch_async(dispatch_get_main_queue(), ^{
+      [self showDefinitionForAttributedString:string
+                                      atPoint:baselinePoint];
+  });
+}
+
+- (void)showLookUpDictionaryOverlayFromRange:(NSRange)range {
+  TextInputClientMac::GetInstance()->GetStringFromRange(
+      renderWidgetHostView_->render_widget_host_, range,
+      ^(NSAttributedString* string, NSPoint baselinePoint) {
+        [self showLookUpDictionaryOverlayInternal:string
+                                    baselinePoint:baselinePoint];
+      }
+  );
+}
+
+- (void)showLookUpDictionaryOverlayAtPoint:(NSPoint)point {
+  TextInputClientMac::GetInstance()->GetStringAtPoint(
+      renderWidgetHostView_->render_widget_host_,
+      gfx::Point(point.x, NSHeight([self frame]) - point.y),
+      ^(NSAttributedString* string, NSPoint baselinePoint) {
+        [self showLookUpDictionaryOverlayInternal:string
+                                    baselinePoint:baselinePoint];
+      }
+  );
+}
+
 // This is invoked only on 10.8 or newer when the user taps a word using
 // three fingers.
 - (void)quickLookWithEvent:(NSEvent*)event {
   NSPoint point = [self convertPoint:[event locationInWindow] fromView:nil];
-  TextInputClientMac::GetInstance()->GetStringAtPoint(
-      renderWidgetHostView_->render_widget_host_,
-      gfx::Point(point.x, NSHeight([self frame]) - point.y),
-      ^(NSAttributedString* string, NSPoint baselinePoint) {
-          if (string && [string length] > 0) {
-            dispatch_async(dispatch_get_main_queue(), ^{
-                [self showDefinitionForAttributedString:string
-                                                atPoint:baselinePoint];
-            });
-          }
-      }
-  );
+  [self showLookUpDictionaryOverlayAtPoint:point];
 }
 
 // This method handles 2 different types of hardware events.
 // (Apple does not distinguish between them).
 //  a. Scrolling the middle wheel of a mouse.
 //  b. Swiping on the track pad.
 //
 // This method is responsible for 2 types of behavior:
 //  a. Scrolling the content of window.
 //  b. Navigating forwards/backwards in history.
@@ skipping 946 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end