1/* 2 * Copyright (C) 2006, 2007, 2008 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 "CachedPage.h" 28 29#include "CSSStyleSelector.h" 30#include "FocusController.h" 31#include "Frame.h" 32#include "FrameView.h" 33#include "Page.h" 34#include <wtf/CurrentTime.h> 35#include <wtf/RefCountedLeakCounter.h> 36 37using namespace JSC; 38 39namespace WebCore { 40 41#ifndef NDEBUG 42static WTF::RefCountedLeakCounter cachedPageCounter("CachedPage"); 43#endif 44 45PassRefPtr<CachedPage> CachedPage::create(Page* page) 46{ 47 return adoptRef(new CachedPage(page)); 48} 49 50CachedPage::CachedPage(Page* page) 51 : m_timeStamp(currentTime()) 52 , m_cachedMainFrame(CachedFrame::create(page->mainFrame())) 53 , m_needStyleRecalcForVisitedLinks(false) 54{ 55#ifndef NDEBUG 56 cachedPageCounter.increment(); 57#endif 58} 59 60CachedPage::~CachedPage() 61{ 62#ifndef NDEBUG 63 cachedPageCounter.decrement(); 64#endif 65 66 destroy(); 67 ASSERT(!m_cachedMainFrame); 68} 69 70void CachedPage::restore(Page* page) 71{ 72 ASSERT(m_cachedMainFrame); 73 ASSERT(page && page->mainFrame() && page->mainFrame() == m_cachedMainFrame->view()->frame()); 74 ASSERT(!page->frameCount()); 75 76 m_cachedMainFrame->open(); 77 78 // Restore the focus appearance for the focused element. 79 // FIXME: Right now we don't support pages w/ frames in the b/f cache. This may need to be tweaked when we add support for that. 80 Document* focusedDocument = page->focusController()->focusedOrMainFrame()->document(); 81 if (Node* node = focusedDocument->focusedNode()) { 82 if (node->isElementNode()) 83 static_cast<Element*>(node)->updateFocusAppearance(true); 84 } 85 86 if (m_needStyleRecalcForVisitedLinks) { 87 for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) { 88 if (CSSStyleSelector* styleSelector = frame->document()->styleSelector()) 89 styleSelector->allVisitedStateChanged(); 90 } 91 } 92 93 clear(); 94} 95 96void CachedPage::clear() 97{ 98 ASSERT(m_cachedMainFrame); 99 m_cachedMainFrame->clear(); 100 m_cachedMainFrame = 0; 101 m_needStyleRecalcForVisitedLinks = false; 102} 103 104void CachedPage::destroy() 105{ 106 if (m_cachedMainFrame) 107 m_cachedMainFrame->destroy(); 108 109 m_cachedMainFrame = 0; 110} 111 112} // namespace WebCore 113