TabContents -> WebContentsImpl, part 2.

content/browser/tab_contents/web_drag_source_mac.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.
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/file_path.h"
-#include "base/memory/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
-#include "googleurl/src/gurl.h"
-
-class WebContentsImpl;
-struct WebDropData;
-
-// A class that handles tracking and event processing for a drag and drop
-// originating from the content area.
-@interface WebDragSource : NSObject {
- @private
-  // Our contents. Weak reference (owns or co-owns us).
-  WebContentsImpl* contents_;
-
-  // The view from which the drag was initiated. Weak reference.
-  NSView* contentsView_;
-
-  // Our drop data. Should only be initialized once.
-  scoped_ptr<WebDropData> dropData_;
-
-  // The image to show as drag image. Can be nil.
-  scoped_nsobject<NSImage> dragImage_;
-
-  // The offset to draw |dragImage_| at.
-  NSPoint imageOffset_;
-
-  // Our pasteboard.
-  scoped_nsobject<NSPasteboard> pasteboard_;
-
-  // A mask of the allowed drag operations.
-  NSDragOperation dragOperationMask_;
-
-  // The file name to be saved to for a drag-out download.
-  FilePath downloadFileName_;
-
-  // The URL to download from for a drag-out download.
-  GURL downloadURL_;
-
-  // The file extension associated with the file drag, if any.
-  NSString* fileExtension_;
-}
-
-// Initialize a WebDragSource object for a drag (originating on the given
-// contentsView and with the given dropData and pboard). Fill the pasteboard
-// with data types appropriate for dropData.
-- (id)initWithContents:(WebContentsImpl*)contents
-                  view:(NSView*)contentsView
-              dropData:(const WebDropData*)dropData
-                 image:(NSImage*)image
-                offset:(NSPoint)offset
-            pasteboard:(NSPasteboard*)pboard
-     dragOperationMask:(NSDragOperation)dragOperationMask;
-
-// Returns a mask of the allowed drag operations.
-- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal;
-
-// Call when asked to do a lazy write to the pasteboard; hook up to
-// -pasteboard:provideDataForType: (on the contentsView).
-- (void)lazyWriteToPasteboard:(NSPasteboard*)pboard
-                      forType:(NSString*)type;
-
-// Start the drag (on the originally provided contentsView); can do this right
-// after -initWithContentsView:....
-- (void)startDrag;
-
-// End the drag and clear the pasteboard; hook up to
-// -draggedImage:endedAt:operation:.
-- (void)endDragAt:(NSPoint)screenPoint
-        operation:(NSDragOperation)operation;
-
-// Drag moved; hook up to -draggedImage:movedTo:.
-- (void)moveDragTo:(NSPoint)screenPoint;
-
-// Call to drag a promised file to the given path (should be called before
-// -endDragAt:...); hook up to -namesOfPromisedFilesDroppedAtDestination:.
-// Returns the file name (not including path) of the file deposited (or which
-// will be deposited).
-- (NSString*)dragPromisedFileTo:(NSString*)path;
-
-@end