Implement Mac Pop-up Dictionary for OOPIF.

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>
 #include <stdint.h>
@@ skipping 42 matching lines @@
 #include "content/common/accessibility_messages.h"
 #include "content/common/edit_command.h"
 #include "content/common/input_messages.h"
 #include "content/common/site_isolation_policy.h"
 #include "content/common/text_input_state.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_plugin_guest_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/native_web_keyboard_event.h"
+#include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
 #import "content/public/browser/render_widget_host_view_mac_delegate.h"
 #include "content/public/browser/web_contents.h"
 #include "gpu/ipc/common/gpu_messages.h"
 #include "skia/ext/platform_canvas.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #import "ui/base/clipboard/clipboard_util_mac.h"
 #include "ui/base/cocoa/animation_utils.h"
 #import "ui/base/cocoa/appkit_utils.h"
@@ skipping 2209 matching lines @@
       renderWidgetHostView_->render_widget_host_, range,
       ^(NSAttributedString* string, NSPoint baselinePoint) {
         [self showLookUpDictionaryOverlayInternal:string
                                     baselinePoint:baselinePoint
                                        targetView:targetView];
       }
   );
 }
 
 - (void)showLookUpDictionaryOverlayAtPoint:(NSPoint)point {
+  gfx::Point rootPoint(point.x, NSHeight([self frame]) - point.y);
+  gfx::Point transformedPoint;
+  if (!renderWidgetHostView_->render_widget_host_ ||
+      !renderWidgetHostView_->render_widget_host_->delegate() ||
+      !renderWidgetHostView_->render_widget_host_->delegate()
+           ->GetInputEventRouter())
+    return;
+
+  RenderWidgetHostImpl* widgetHost =
+      renderWidgetHostView_->render_widget_host_->delegate()
+          ->GetInputEventRouter()
+          ->GetRenderWidgetHostAtPoint(renderWidgetHostView_.get(), rootPoint,
+                                       &transformedPoint);
+  if (!widgetHost)
+    return;
+
+  // TODO(ekaramad): The position reported by the renderer is with respect to
+  // |widgetHost|'s coordinate space with y-axis inverted to conform to AppKit
+  // coordinate system. The point will need to be transformed into root view's
+  // coordinate system (RenderWidgetHostViewMac in this case). However, since
+  // the callback is invoked on IO thread it will require some thread hopping to
+  // do so. For this reason, for now, we accept this non-ideal way of fixing the
+  // point offset manually from the view bounds. This should be revisited when
+  // fixing issues in TextInputClientMac (https://crbug.com/643233).
+  gfx::Rect root_box = renderWidgetHostView_->GetViewBounds();
+  gfx::Rect view_box = widgetHost->GetView()->GetViewBounds();
+
   TextInputClientMac::GetInstance()->GetStringAtPoint(
-      renderWidgetHostView_->render_widget_host_,
-      gfx::Point(point.x, NSHeight([self frame]) - point.y),
+      widgetHost, transformedPoint,
       ^(NSAttributedString* string, NSPoint baselinePoint) {
+        baselinePoint.x += view_box.origin().x() - root_box.origin().x();
+        baselinePoint.y +=
+            root_box.bottom_left().y() - view_box.bottom_left().y();
         [self showLookUpDictionaryOverlayInternal:string
                                     baselinePoint:baselinePoint
                                        targetView:self];
-      }
-  );
+      });
 }
 
 // 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];
   [self showLookUpDictionaryOverlayAtPoint:point];
 }
 
 // This method handles 2 different types of hardware events.
@@ skipping 496 matching lines @@
 
 - (NSUInteger)characterIndexForPoint:(NSPoint)thePoint {
   DCHECK([self window]);
   // |thePoint| is in screen coordinates, but needs to be converted to WebKit
   // coordinates (upper left origin). Scroll offsets will be taken care of in
   // the renderer.
   thePoint = ui::ConvertPointFromScreenToWindow([self window], thePoint);
   thePoint = [self convertPoint:thePoint fromView:nil];
   thePoint.y = NSHeight([self frame]) - thePoint.y;
 
+  if (!renderWidgetHostView_->render_widget_host_ ||
+      !renderWidgetHostView_->render_widget_host_->delegate() ||
+      !renderWidgetHostView_->render_widget_host_->delegate()
+           ->GetInputEventRouter())
+    return NSNotFound;
+
+  gfx::Point rootPoint(thePoint.x, thePoint.y);
+  gfx::Point transformedPoint;
+  RenderWidgetHostImpl* widgetHost =
+      renderWidgetHostView_->render_widget_host_->delegate()
+          ->GetInputEventRouter()
+          ->GetRenderWidgetHostAtPoint(renderWidgetHostView_.get(), rootPoint,
+                                       &transformedPoint);
+  if (!widgetHost)
+    return NSNotFound;
+
   NSUInteger index =
       TextInputClientMac::GetInstance()->GetCharacterIndexAtPoint(
-          renderWidgetHostView_->render_widget_host_,
-          gfx::Point(thePoint.x, thePoint.y));
+          widgetHost, transformedPoint);
   return index;
 }
 
 - (NSRect)firstViewRectForCharacterRange:(NSRange)theRange
                              actualRange:(NSRangePointer)actualRange {
   NSRect rect;
   if (!renderWidgetHostView_->GetCachedFirstRectForCharacterRange(
           theRange,
           &rect,
           actualRange)) {
@@ skipping 436 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