1 /*
2 * Copyright (C) 2013 Google 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 GOOGLE, 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
27 #include "config.h"
28 #include "platform/OverscrollTheme.h"
29
30 namespace WebCore {
31
OverscrollTheme()32 OverscrollTheme::OverscrollTheme()
33 {
34 #if USE(RUBBER_BANDING)
35 // Load the shadow and pattern for the overhang.
36 m_overhangShadow = Image::loadPlatformResource("overhangShadow");
37 m_overhangPattern = Image::loadPlatformResource("overhangPattern");
38 #endif
39 }
40
getOverhangImage()41 PassRefPtr<Image> OverscrollTheme::getOverhangImage()
42 {
43 return m_overhangPattern;
44 }
45
setUpOverhangShadowLayer(GraphicsLayer * overhangShadowLayer)46 void OverscrollTheme::setUpOverhangShadowLayer(GraphicsLayer* overhangShadowLayer)
47 {
48 // The shadow texture is has a 1-pixel aperture in the center, so the division by
49 // two is doing an intentional round-down.
50 overhangShadowLayer->setContentsToNinePatch(
51 m_overhangShadow.get(),
52 IntRect(m_overhangShadow->width() / 2, m_overhangShadow->height() / 2, 1, 1));
53 }
54
updateOverhangShadowLayer(GraphicsLayer * shadowLayer,GraphicsLayer * rootContentLayer)55 void OverscrollTheme::updateOverhangShadowLayer(GraphicsLayer* shadowLayer, GraphicsLayer* rootContentLayer)
56 {
57 // Note that for the position, the division m_overhangShadow->width() / 2 is an intentional
58 // round-down, and that for the width and height, the 1-pixel aperture is being replaced
59 // by the root contents layer, hence subtracting 1 and adding the rootContentsLayer size.
60 IntRect shadowRect(
61 static_cast<int>(rootContentLayer->position().x()) - m_overhangShadow->width() / 2,
62 static_cast<int>(rootContentLayer->position().y()) - m_overhangShadow->height() / 2,
63 static_cast<int>(rootContentLayer->size().width()) + m_overhangShadow->width() - 1,
64 static_cast<int>(rootContentLayer->size().height()) + m_overhangShadow->height() - 1);
65 shadowLayer->setContentsRect(shadowRect);
66 }
67
theme()68 OverscrollTheme* OverscrollTheme::theme()
69 {
70 DEFINE_STATIC_LOCAL(OverscrollTheme, theme, ());
71 return &theme;
72 }
73
74 }
75