content/browser/web_contents/web_drag_source_mac.h

   1 // Copyright (c) 2012 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 #import <Cocoa/Cocoa.h>
   6
   7 #include "base/files/file_path.h"
   8 #include "base/mac/scoped_cftyperef.h"
   9 #include "base/mac/scoped_nsobject.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "content/common/content_export.h"
  12 #include "url/gurl.h"
  13
  14 namespace content {
  15 class WebContentsImpl;
  16 struct DropData;
  17 }
  18
  19 // A class that handles tracking and event processing for a drag and drop
  20 // originating from the content area.
  21 CONTENT_EXPORT
  22 @interface WebDragSource : NSObject {
  23  @private
  24   // Our contents. Weak reference (owns or co-owns us).
  25   content::WebContentsImpl* contents_;
  26
  27   // The view from which the drag was initiated. Weak reference.
  28   NSView* contentsView_;
  29
  30   // Our drop data. Should only be initialized once.
  31   scoped_ptr<content::DropData> dropData_;
  32
  33   // The image to show as drag image. Can be nil.
  34   base::scoped_nsobject<NSImage> dragImage_;
  35
  36   // The offset to draw |dragImage_| at.
  37   NSPoint imageOffset_;
  38
  39   // Our pasteboard.
  40   base::scoped_nsobject<NSPasteboard> pasteboard_;
  41
  42   // A mask of the allowed drag operations.
  43   NSDragOperation dragOperationMask_;
  44
  45   // The file name to be saved to for a drag-out download.
  46   base::FilePath downloadFileName_;
  47
  48   // The URL to download from for a drag-out download.
  49   GURL downloadURL_;
  50
  51   // The file UTI associated with the file drag, if any.
  52   base::ScopedCFTypeRef<CFStringRef> fileUTI_;
  53 }
  54
  55 // Initialize a WebDragSource object for a drag (originating on the given
  56 // contentsView and with the given dropData and pboard). Fill the pasteboard
  57 // with data types appropriate for dropData.
  58 - (id)initWithContents:(content::WebContentsImpl*)contents
  59                   view:(NSView*)contentsView
  60               dropData:(const content::DropData*)dropData
  61                  image:(NSImage*)image
  62                 offset:(NSPoint)offset
  63             pasteboard:(NSPasteboard*)pboard
  64      dragOperationMask:(NSDragOperation)dragOperationMask;
  65
  66 // Call when the web contents is gone.
  67 - (void)clearWebContentsView;
  68
  69 // Returns a mask of the allowed drag operations.
  70 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal;
  71
  72 // Call when asked to do a lazy write to the pasteboard; hook up to
  73 // -pasteboard:provideDataForType: (on the contentsView).
  74 - (void)lazyWriteToPasteboard:(NSPasteboard*)pboard
  75                       forType:(NSString*)type;
  76
  77 // Start the drag (on the originally provided contentsView); can do this right
  78 // after -initWithContentsView:....
  79 - (void)startDrag;
  80
  81 // End the drag and clear the pasteboard; hook up to
  82 // -draggedImage:endedAt:operation:.
  83 - (void)endDragAt:(NSPoint)screenPoint
  84         operation:(NSDragOperation)operation;
  85
  86 // Call to drag a promised file to the given path (should be called before
  87 // -endDragAt:...); hook up to -namesOfPromisedFilesDroppedAtDestination:.
  88 // Returns the file name (not including path) of the file deposited (or which
  89 // will be deposited).
  90 - (NSString*)dragPromisedFileTo:(NSString*)path;
  91
  92 @end