web_drag_dest_mac.h revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d
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/memory/scoped_ptr.h" 8#include "base/string16.h" 9#include "content/common/content_export.h" 10#include "webkit/glue/webdropdata.h" 11 12 13namespace content { 14class RenderViewHost; 15class WebContentsImpl; 16class WebDragDestDelegate; 17} 18 19// A typedef for a RenderViewHost used for comparison purposes only. 20typedef content::RenderViewHost* RenderViewHostIdentifier; 21 22// A class that handles tracking and event processing for a drag and drop 23// over the content area. Assumes something else initiates the drag, this is 24// only for processing during a drag. 25CONTENT_EXPORT 26@interface WebDragDest : NSObject { 27 @private 28 // Our associated WebContentsImpl. Weak reference. 29 content::WebContentsImpl* webContents_; 30 31 // Delegate; weak. 32 content::WebDragDestDelegate* delegate_; 33 34 // Updated asynchronously during a drag to tell us whether or not we should 35 // allow the drop. 36 NSDragOperation currentOperation_; 37 38 // Keep track of the render view host we're dragging over. If it changes 39 // during a drag, we need to re-send the DragEnter message. 40 RenderViewHostIdentifier currentRVH_; 41 42 // The data for the current drag, or NULL if none is in progress. 43 scoped_ptr<WebDropData> dropData_; 44} 45 46// |contents| is the WebContentsImpl representing this tab, used to communicate 47// drag&drop messages to WebCore and handle navigation on a successful drop 48// (if necessary). 49- (id)initWithWebContentsImpl:(content::WebContentsImpl*)contents; 50 51- (WebDropData*)currentDropData; 52 53- (void)setDragDelegate:(content::WebDragDestDelegate*)delegate; 54 55// Sets the current operation negotiated by the source and destination, 56// which determines whether or not we should allow the drop. Takes effect the 57// next time |-draggingUpdated:| is called. 58- (void)setCurrentOperation:(NSDragOperation)operation; 59 60// Messages to send during the tracking of a drag, ususally upon receiving 61// calls from the view system. Communicates the drag messages to WebCore. 62- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)info 63 view:(NSView*)view; 64- (void)draggingExited:(id<NSDraggingInfo>)info; 65- (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)info 66 view:(NSView*)view; 67- (BOOL)performDragOperation:(id<NSDraggingInfo>)info 68 view:(NSView*)view; 69 70@end 71 72// Public use only for unit tests. 73@interface WebDragDest(Testing) 74// Given |data|, which should not be nil, fill it in using the contents of the 75// given pasteboard. 76- (void)populateWebDropData:(WebDropData*)data 77 fromPasteboard:(NSPasteboard*)pboard; 78// Given a point in window coordinates and a view in that window, return a 79// flipped point in the coordinate system of |view|. 80- (NSPoint)flipWindowPointToView:(const NSPoint&)windowPoint 81 view:(NSView*)view; 82// Given a point in window coordinates and a view in that window, return a 83// flipped point in screen coordinates. 84- (NSPoint)flipWindowPointToScreen:(const NSPoint&)windowPoint 85 view:(NSView*)view; 86@end 87