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 "Frame.h"
33
34 namespace WebCore {
35
fitDragImageToMaxSize(DragImageRef image,const IntSize & srcSize,const IntSize & size)36 DragImageRef 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
createDragImageForSelection(Frame * frame)68 DragImageRef createDragImageForSelection(Frame* frame)
69 {
70 DragImageRef image = frame->dragImageForSelection();
71 if (image)
72 image = dissolveDragImageToFraction(image, DragController::DragImageAlpha);
73 return image;
74 }
75
76 #if !PLATFORM(MAC) && (!PLATFORM(WIN) || OS(WINCE))
createDragImageForLink(KURL &,const String &,Frame *)77 DragImageRef createDragImageForLink(KURL&, const String&, Frame*)
78 {
79 return 0;
80 }
81 #endif
82
83 } // namespace WebCore
84
85 #endif // ENABLE(DRAG_SUPPORT)
86