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
37 using namespace JSC;
38
39 namespace WebCore {
40
41 #ifndef NDEBUG
42 static WTF::RefCountedLeakCounter cachedPageCounter("CachedPage");
43 #endif
44
create(Page * page)45 PassRefPtr<CachedPage> CachedPage::create(Page* page)
46 {
47 return adoptRef(new CachedPage(page));
48 }
49
CachedPage(Page * page)50 CachedPage::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
~CachedPage()60 CachedPage::~CachedPage()
61 {
62 #ifndef NDEBUG
63 cachedPageCounter.decrement();
64 #endif
65
66 destroy();
67 ASSERT(!m_cachedMainFrame);
68 }
69
restore(Page * page)70 void 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
clear()96 void CachedPage::clear()
97 {
98 ASSERT(m_cachedMainFrame);
99 m_cachedMainFrame->clear();
100 m_cachedMainFrame = 0;
101 m_needStyleRecalcForVisitedLinks = false;
102 }
103
destroy()104 void CachedPage::destroy()
105 {
106 if (m_cachedMainFrame)
107 m_cachedMainFrame->destroy();
108
109 m_cachedMainFrame = 0;
110 }
111
112 } // namespace WebCore
113