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 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 41 PassRefPtr<Image> OverscrollTheme::getOverhangImage() 42 { 43 return m_overhangPattern; 44 } 45 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 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 68 OverscrollTheme* OverscrollTheme::theme() 69 { 70 DEFINE_STATIC_LOCAL(OverscrollTheme, theme, ()); 71 return &theme; 72 } 73 74 } 75
