/*

 * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#import <AppKit/AppKit.h>

#define WebDragImageAlpha 0.75f

@class DOMElement;

@class WebFrameView;

@class WebView;

@interface NSView (WebExtras)

// Returns the nearest enclosing view of the given class, or nil if none.

- (NSView *)_web_superviewOfClass:(Class)viewClass;

- (WebFrameView *)_web_parentWebFrameView;

- (WebView *)_webView;

// returns whether a drag should begin starting with mouseDownEvent; if the time

// passes expiration or the mouse moves less than the hysteresis before the mouseUp event,

// returns NO, else returns YES.

- (BOOL)_web_dragShouldBeginFromMouseDown:(NSEvent *)mouseDownEvent

                           withExpiration:(NSDate *)expiration

                              xHysteresis:(float)xHysteresis

                              yHysteresis:(float)yHysteresis;

// Calls _web_dragShouldBeginFromMouseDown:withExpiration:xHysteresis:yHysteresis: with

// the default values for xHysteresis and yHysteresis

- (BOOL)_web_dragShouldBeginFromMouseDown:(NSEvent *)mouseDownEvent

                           withExpiration:(NSDate *)expiration;

// Convenience method. Returns NSDragOperationCopy if _web_bestURLFromPasteboard doesn't return nil.

// Returns NSDragOperationNone otherwise.

- (NSDragOperation)_web_dragOperationForDraggingInfo:(id <NSDraggingInfo>)sender;

// Resizes and applies alpha to image and drags it.

- (void)_web_DragImageForElement:(DOMElement *)element

                         rect:(NSRect)rect

                        event:(NSEvent *)event

                   pasteboard:(NSPasteboard *)pasteboard 

                       source:(id)source

                       offset:(NSPoint *)dragImageOffset;

- (BOOL)_web_firstResponderIsSelfOrDescendantView;

- (NSRect)_web_convertRect:(NSRect)aRect toView:(NSView *)aView;

@end