/*

 * Copyright (C) 2007, 2009 Apple 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR

 * 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 "config.h"

#import "DragImage.h"

#if ENABLE(DRAG_SUPPORT)

#import "CachedImage.h"

#import "Image.h"

#import "KURL.h"

#import "ResourceResponse.h"

namespace WebCore {

IntSize dragImageSize(RetainPtr<NSImage> image)

{

    return (IntSize)[image.get() size];

}

void deleteDragImage(RetainPtr<NSImage>)

{

    // Since this is a RetainPtr, there's nothing additional we need to do to

    // delete it. It will be released when it falls out of scope.

}

RetainPtr<NSImage> scaleDragImage(RetainPtr<NSImage> image, FloatSize scale)

{

    NSSize originalSize = [image.get() size];

    NSSize newSize = NSMakeSize((originalSize.width * scale.width()), (originalSize.height * scale.height()));

    newSize.width = roundf(newSize.width);

    newSize.height = roundf(newSize.height);

    [image.get() setScalesWhenResized:YES];

    [image.get() setSize:newSize];

    return image;

}

RetainPtr<NSImage> dissolveDragImageToFraction(RetainPtr<NSImage> image, float delta)

{

    RetainPtr<NSImage> dissolvedImage(AdoptNS, [[NSImage alloc] initWithSize:[image.get() size]]);

    NSPoint point = [image.get() isFlipped] ? NSMakePoint(0, [image.get() size].height) : NSZeroPoint;

    // In this case the dragging image is always correct.

    [dissolvedImage.get() setFlipped:[image.get() isFlipped]];

    [dissolvedImage.get() lockFocus];

    [image.get() dissolveToPoint:point fraction: delta];

    [dissolvedImage.get() unlockFocus];

    [image.get() lockFocus];

    [dissolvedImage.get() compositeToPoint:point operation:NSCompositeCopy];

    [image.get() unlockFocus];

    return image;

}

RetainPtr<NSImage> createDragImageFromImage(Image* image)

{

    RetainPtr<NSImage> dragImage(AdoptNS, [image->getNSImage() copy]);

    [dragImage.get() setSize:(NSSize)(image->size())];

    return dragImage;

}

RetainPtr<NSImage> createDragImageIconForCachedImage(CachedImage* image)

{

    const String& filename = image->response().suggestedFilename();

    NSString *extension = nil;

    int dotIndex = filename.reverseFind('.');

    if (dotIndex > 0 && dotIndex < (int)(filename.length() - 1)) // require that a . exists after the first character and before the last

        extension = filename.substring(dotIndex + 1);

    else {

        // It might be worth doing a further lookup to pull the extension from the MIME type.

        extension = @"";

    }

    return [[NSWorkspace sharedWorkspace] iconForFileType:extension];

}

} // namespace WebCore

#endif // ENABLE(DRAG_SUPPORT)