MacViews: Implemented Drag & Drop

ui/base/dragdrop/os_exchange_data_provider_mac.h

 // 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.
 
 #ifndef UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_MAC_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_MAC_H_
 
+#include "base/event_types.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #import "ui/base/clipboard/clipboard_util_mac.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
+#include "ui/events/event.h"
+#include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/image/image_skia.h"
 
 @class NSPasteboard;
+@class NSArray;
+@class NSData;
+@class NSString;
 
 namespace ui {
 class UniquePasteboard;
 
 // OSExchangeData::Provider implementation for Mac.
 class UI_BASE_EXPORT OSExchangeDataProviderMac
     : public OSExchangeData::Provider {
  public:
   OSExchangeDataProviderMac();
   ~OSExchangeDataProviderMac() override;
@@ skipping 13 matching lines @@
                       GURL* url,
                       base::string16* title) const override;
   bool GetFilename(base::FilePath* path) const override;
   bool GetFilenames(std::vector<FileInfo>* filenames) const override;
   bool GetPickledData(const Clipboard::FormatType& format,
                       base::Pickle* data) const override;
   bool HasString() const override;
   bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const override;
   bool HasFile() const override;
   bool HasCustomFormat(const Clipboard::FormatType& format) const override;
+  void SetDragImage(const gfx::ImageSkia& image,
+                    const gfx::Vector2d& cursor_offset) override;
+  const gfx::ImageSkia& GetDragImage() const override;
+  const gfx::Vector2d& GetDragImageOffset() const override;
+
+  // Returns the data for the specified type in the pasteboard.
+  NSData* GetNSDataForType(NSString* type) const;
+
+  // Returns an array containing the types of data currently contained in
+  // the pasteboard.
+  NSArray* GetPasteboardTypes() const;
+
+  // Creates an OSExchangeData object from the given NSPasteboard object.
+  static std::unique_ptr<OSExchangeData> CreateDataFromPasteboard(
+      NSPasteboard*);
+
+  // Returns an array of pasteboard types that can be supported by
+  // OSExchangeData.
+  static NSArray* SupportedPasteboardTypes();
 
  private:
   explicit OSExchangeDataProviderMac(scoped_refptr<ui::UniquePasteboard>);
   scoped_refptr<ui::UniquePasteboard> pasteboard_;
+  std::unique_ptr<Event> event_;
+
+  gfx::ImageSkia drag_image_;
+  gfx::Vector2d cursor_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderMac);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_MAC_H_