/*

 * Copyright (C) 2007 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. 

 */

#include "config.h"

#include "DragImage.h"

#include "DragController.h"

#include "Frame.h"

namespace WebCore {

DragImageRef fitDragImageToMaxSize(DragImageRef image, const IntSize& srcSize, const IntSize& size)

{

    float heightResizeRatio = 0.0f;

    float widthResizeRatio = 0.0f;

    float resizeRatio = -1.0f;

    IntSize originalSize = dragImageSize(image);

    if (srcSize.width() > size.width()) {

        widthResizeRatio = size.width() / (float)srcSize.width();

        resizeRatio = widthResizeRatio;

    }

    if (srcSize.height() > size.height()) {

        heightResizeRatio = size.height() / (float)srcSize.height();

        if ((resizeRatio < 0.0f) || (resizeRatio > heightResizeRatio))

            resizeRatio = heightResizeRatio;

    }

    if (srcSize == originalSize)

        return resizeRatio > 0.0f ? scaleDragImage(image, FloatSize(resizeRatio, resizeRatio)) : image;

    // The image was scaled in the webpage so at minimum we must account for that scaling

    float scalex = srcSize.width() / (float)originalSize.width();

    float scaley = srcSize.height() / (float)originalSize.height();

    if (resizeRatio > 0.0f) {

        scalex *= resizeRatio;

        scaley *= resizeRatio;

    }

    return scaleDragImage(image, FloatSize(scalex, scaley));

}

DragImageRef createDragImageForSelection(Frame* frame)

{

    DragImageRef image = frame->dragImageForSelection();

    if (image)

        dissolveDragImageToFraction(image, DragController::DragImageAlpha);

    return image;

}

}