MacViews: Implemented Drag & Drop

ui/views/widget/native_widget_mac.mm

 // Copyright 2014 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 "ui/views/widget/native_widget_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <utility>
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ui/base/cocoa/constrained_window/constrained_window_animation.h"
 #import "ui/base/cocoa/window_size_constants.h"
 #include "ui/gfx/font_list.h"
 #import "ui/gfx/mac/coordinate_conversion.h"
 #import "ui/gfx/mac/nswindow_frame_controls.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/native_theme/native_theme_mac.h"
 #import "ui/views/cocoa/bridged_content_view.h"
 #import "ui/views/cocoa/bridged_native_widget.h"
+#import "ui/views/cocoa/drag_drop_client_mac.h"
 #import "ui/views/cocoa/native_widget_mac_nswindow.h"
 #import "ui/views/cocoa/views_nswindow_delegate.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/window/native_frame_view.h"
 
 // Self-owning animation delegate that starts a hide animation, then calls
 // -[NSWindow close] when the animation ends, releasing itself.
 @interface ViewsNSWindowCloseAnimator : NSObject<NSAnimationDelegate> {
  @private
   base::scoped_nsobject<NSWindow> window_;
@@ skipping 161 matching lines @@
 }
 
 void NativeWidgetMac::ReorderNativeViews() {
   if (bridge_) {
     bridge_->SetRootView(GetWidget()->GetRootView());
     bridge_->ReorderChildViews();
   }
 }
 
 void NativeWidgetMac::ViewRemoved(View* view) {
-  // TODO(tapted): Something for drag and drop might be needed here in future.
-  // See http://crbug.com/464581. A NOTIMPLEMENTED() here makes a lot of spam,
-  // so only emit it when a drag and drop could be likely.
-  if (IsMouseButtonDown())
-    NOTIMPLEMENTED();
+  DragDropClientMac* client = bridge_ ? bridge_->drag_drop_client() : nullptr;
+  if (client)
+    client->drop_helper()->ResetTargetViewIfEquals(view);
 }
 
 void NativeWidgetMac::SetNativeWindowProperty(const char* name, void* value) {
   if (bridge_)
     bridge_->SetNativeWindowProperty(name, value);
 }
 
 void* NativeWidgetMac::GetNativeWindowProperty(const char* name) const {
   if (bridge_)
     return bridge_->GetNativeWindowProperty(name);
@@ skipping 281 matching lines @@
 
 void NativeWidgetMac::FlashFrame(bool flash_frame) {
   NOTIMPLEMENTED();
 }
 
 void NativeWidgetMac::RunShellDrag(View* view,
                                    const ui::OSExchangeData& data,
                                    const gfx::Point& location,
                                    int operation,
                                    ui::DragDropTypes::DragEventSource source) {
-  NOTIMPLEMENTED();
+  bridge_->drag_drop_client()->StartDragAndDrop(view, data, operation, source);
 }
 
 void NativeWidgetMac::SchedulePaintInRect(const gfx::Rect& rect) {
   // |rect| is relative to client area of the window.
   NSWindow* window = GetNativeWindow();
   NSRect client_rect = [window contentRectForFrameRect:[window frame]];
   NSRect target_rect = rect.ToCGRect();
 
   // Convert to Appkit coordinate system (origin at bottom left).
   target_rect.origin.y =
@@ skipping 226 matching lines @@
   [[ViewsNSWindowCloseAnimator alloc] initWithWindow:window];
 }
 
 - (void)animationDidEnd:(NSAnimation*)animation {
   [window_ close];
   [animation_ setDelegate:nil];
   [self release];
 }
 
 @end