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 #include "DragController.h"
29
30 #include "Frame.h"
31
32 namespace WebCore {
33
fitDragImageToMaxSize(DragImageRef image,const IntSize & srcSize,const IntSize & size)34 DragImageRef fitDragImageToMaxSize(DragImageRef image, const IntSize& srcSize, const IntSize& size)
35 {
36 float heightResizeRatio = 0.0f;
37 float widthResizeRatio = 0.0f;
38 float resizeRatio = -1.0f;
39 IntSize originalSize = dragImageSize(image);
40
41 if (srcSize.width() > size.width()) {
42 widthResizeRatio = size.width() / (float)srcSize.width();
43 resizeRatio = widthResizeRatio;
44 }
45
46 if (srcSize.height() > size.height()) {
47 heightResizeRatio = size.height() / (float)srcSize.height();
48 if ((resizeRatio < 0.0f) || (resizeRatio > heightResizeRatio))
49 resizeRatio = heightResizeRatio;
50 }
51
52 if (srcSize == originalSize)
53 return resizeRatio > 0.0f ? scaleDragImage(image, FloatSize(resizeRatio, resizeRatio)) : image;
54
55 // The image was scaled in the webpage so at minimum we must account for that scaling
56 float scalex = srcSize.width() / (float)originalSize.width();
57 float scaley = srcSize.height() / (float)originalSize.height();
58 if (resizeRatio > 0.0f) {
59 scalex *= resizeRatio;
60 scaley *= resizeRatio;
61 }
62
63 return scaleDragImage(image, FloatSize(scalex, scaley));
64 }
65
createDragImageForSelection(Frame * frame)66 DragImageRef createDragImageForSelection(Frame* frame)
67 {
68 DragImageRef image = frame->dragImageForSelection();
69 if (image)
70 dissolveDragImageToFraction(image, DragController::DragImageAlpha);
71 return image;
72 }
73
74 }
75