1/*
2 * Copyright (C) 2007 Apple Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "DragImage.h"
28
29#if ENABLE(DRAG_SUPPORT)
30#include "DragController.h"
31
32#include "FontRenderingMode.h"
33
34namespace WebCore {
35
36DragImageRef fitDragImageToMaxSize(DragImageRef image, const IntSize& srcSize, const IntSize& size)
37{
38    float heightResizeRatio = 0.0f;
39    float widthResizeRatio = 0.0f;
40    float resizeRatio = -1.0f;
41    IntSize originalSize = dragImageSize(image);
42
43    if (srcSize.width() > size.width()) {
44        widthResizeRatio = size.width() / (float)srcSize.width();
45        resizeRatio = widthResizeRatio;
46    }
47
48    if (srcSize.height() > size.height()) {
49        heightResizeRatio = size.height() / (float)srcSize.height();
50        if ((resizeRatio < 0.0f) || (resizeRatio > heightResizeRatio))
51            resizeRatio = heightResizeRatio;
52    }
53
54    if (srcSize == originalSize)
55        return resizeRatio > 0.0f ? scaleDragImage(image, FloatSize(resizeRatio, resizeRatio)) : image;
56
57    // The image was scaled in the webpage so at minimum we must account for that scaling
58    float scalex = srcSize.width() / (float)originalSize.width();
59    float scaley = srcSize.height() / (float)originalSize.height();
60    if (resizeRatio > 0.0f) {
61        scalex *= resizeRatio;
62        scaley *= resizeRatio;
63    }
64
65    return scaleDragImage(image, FloatSize(scalex, scaley));
66}
67
68#if !PLATFORM(MAC) && (!PLATFORM(WIN) || OS(WINCE))
69DragImageRef createDragImageForLink(KURL&, const String&, FontRenderingMode)
70{
71    return 0;
72}
73#endif
74
75} // namespace WebCore
76
77#endif // ENABLE(DRAG_SUPPORT)
78