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;
 
   // Overridden from OSExchangeData::Provider:
   Provider* Clone() const override;
   void MarkOriginatedFromRenderer() override;
   bool DidOriginateFromRenderer() const override;
   void SetString(const base::string16& data) override;
   void SetURL(const GURL& url, const base::string16& title) override;
   void SetFilename(const base::FilePath& path) override;
   void SetFilenames(const std::vector<FileInfo>& filenames) override;
   void SetPickledData(const Clipboard::FormatType& format,
                       const base::Pickle& data) override;
+  void SetDragImage(const gfx::ImageSkia& image,

[tapted, 2016/05/24 08:06:00]

nit: move down after HasCustomFormat() -- generally the order of overrides
should match the order things were declared in the parent class. GetDragImage()
and the others should be moved down as well (make sure to move them in the .mm
as well)

[spqchan, 2016/05/26 01:56:53]

Done.

+                    const gfx::Vector2d& cursor_offset) override;
+  void SetEvent(const Event& event) override;
   bool GetString(base::string16* data) const override;
   bool GetURLAndTitle(OSExchangeData::FilenameToURLPolicy policy,
                       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;
+  const gfx::ImageSkia& GetDragImage() const override;
+  const gfx::Vector2d& GetDragImageOffset() const override;
+  const Event* GetEvent() const override;
+  NSData* GetNSDataForType(NSString* type) const;

[tapted, 2016/05/24 08:06:00]

non-overrides should be separate (move below, with a comment)

[spqchan, 2016/05/26 01:56:53]

Done.

   bool HasString() const override;
   bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const override;
   bool HasFile() const override;
   bool HasCustomFormat(const Clipboard::FormatType& format) const override;
 
+  // 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_