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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_WEB_CONTENTS_DRAG_SOURCE_H_
      6 #define CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_WEB_CONTENTS_DRAG_SOURCE_H_
      7 #pragma once
      8 
      9 #import <Cocoa/Cocoa.h>
     10 
     11 #include "base/memory/scoped_nsobject.h"
     12 #include "chrome/browser/bookmarks/bookmark_node_data.h"
     13 
     14 @class TabContentsViewCocoa;
     15 
     16 // A class that handles tracking and event processing for a drag and drop
     17 // originating from the content area.  Subclasses should implement
     18 // fillClipboard and dragImage.
     19 @interface WebContentsDragSource : NSObject {
     20  @private
     21   // Our tab. Weak reference (owns or co-owns us).
     22   TabContentsViewCocoa* contentsView_;
     23 
     24   // Our pasteboard.
     25   scoped_nsobject<NSPasteboard> pasteboard_;
     26 
     27   // A mask of the allowed drag operations.
     28   NSDragOperation dragOperationMask_;
     29 }
     30 
     31 // Initialize a DragDataSource object for a drag (originating on the given
     32 // contentsView and with the given dropData and pboard). Fill the pasteboard
     33 // with data types appropriate for dropData.
     34 - (id)initWithContentsView:(TabContentsViewCocoa*)contentsView
     35                 pasteboard:(NSPasteboard*)pboard
     36          dragOperationMask:(NSDragOperation)dragOperationMask;
     37 
     38 // Creates the drag image.  Implemented by the subclass.
     39 - (NSImage*)dragImage;
     40 
     41 // Put the data being dragged onto the pasteboard.  Implemented by the
     42 // subclass.
     43 - (void)fillPasteboard;
     44 
     45 // Returns a mask of the allowed drag operations.
     46 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal;
     47 
     48 // Start the drag (on the originally provided contentsView); can do this right
     49 // after -initWithContentsView:....
     50 - (void)startDrag;
     51 
     52 // End the drag and clear the pasteboard; hook up to
     53 // -draggedImage:endedAt:operation:.
     54 - (void)endDragAt:(NSPoint)screenPoint
     55         operation:(NSDragOperation)operation;
     56 
     57 // Drag moved; hook up to -draggedImage:movedTo:.
     58 - (void)moveDragTo:(NSPoint)screenPoint;
     59 
     60 @end
     61 
     62 #endif  // CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_WEB_CONTENTS_DRAG_SOURCE_H_
     63