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