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 93