MacViews: Implemented Drag & Drop

ui/base/dragdrop/os_exchange_data.h

 // 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.
 
 #ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_
 
 #include <memory>
 #include <set>
 #include <string>
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <objidl.h>
 #endif
 
+#include "base/event_types.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/dragdrop/download_file_interface.h"
 #include "ui/base/ui_base_export.h"
+#include "ui/events/event.h"
 
 class GURL;
 
 namespace base {
 class Pickle;
 }
 
 namespace gfx {
 class ImageSkia;
 class Vector2d;
@@ skipping 96 matching lines @@
     virtual bool GetHtml(base::string16* html, GURL* base_url) const = 0;
     virtual bool HasHtml() const = 0;
 #endif
 
 #if defined(USE_AURA)
     virtual void SetDragImage(const gfx::ImageSkia& image,
                               const gfx::Vector2d& cursor_offset) = 0;
     virtual const gfx::ImageSkia& GetDragImage() const = 0;
     virtual const gfx::Vector2d& GetDragImageOffset() const = 0;
 #endif
+
+#if defined(OS_MACOSX)
+    virtual void SetDragImage(const gfx::ImageSkia& image) = 0;

[tapted, 2016/05/11 12:36:15]

it's probably nicer to expose the existing Aura methods on Mac (e.g. replace
USE_AURA -> TOOLKIT_VIEWS), and just ignore cursor_offset if we don't use it
(yet)

[spqchan, 2016/05/23 21:26:21]

I added defined(OS_MACOSX), I ran into some trouble when I simply replaced
USE_AURA with TOOLKIT_VIEWS

+    virtual const gfx::ImageSkia& GetDragImage() const = 0;
+    virtual void SetNativeEvent(const base::NativeEvent& event) = 0;
+    virtual const base::NativeEvent& GetNativeEvent() const = 0;
+#endif
   };
 
   // Creates the platform specific Provider.
   static Provider* CreateProvider();
 
   OSExchangeData();
   // Creates an OSExchangeData with the specified provider. OSExchangeData
   // takes ownership of the supplied provider.
   explicit OSExchangeData(Provider* provider);
 
@@ skipping 81 matching lines @@
  private:
   // Provides the actual data.
   std::unique_ptr<Provider> provider_;
 
   DISALLOW_COPY_AND_ASSIGN(OSExchangeData);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_