Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 102 insertions, 0 deletions

diff --git a/Source/WebCore/history/CachedPage.cpp b/Source/WebCore/history/CachedPage.cpp
new file mode 100644
index 0000000..acbfd31
--- /dev/null
+++ b/Source/WebCore/history/CachedPage.cpp
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "CachedPage.h"
+
+#include "FocusController.h"
+#include "Frame.h"
+#include "FrameView.h"
+#include "Page.h"
+#include <wtf/CurrentTime.h>
+#include <wtf/RefCountedLeakCounter.h>
+
+using namespace JSC;
+
+namespace WebCore {
+
+#ifndef NDEBUG
+static WTF::RefCountedLeakCounter cachedPageCounter("CachedPage");
+#endif
+
+PassRefPtr<CachedPage> CachedPage::create(Page* page)
+{
+    return adoptRef(new CachedPage(page));
+}
+
+CachedPage::CachedPage(Page* page)
+    : m_timeStamp(currentTime())
+    , m_cachedMainFrame(CachedFrame::create(page->mainFrame()))
+{
+#ifndef NDEBUG
+    cachedPageCounter.increment();
+#endif
+}
+
+CachedPage::~CachedPage()
+{
+#ifndef NDEBUG
+    cachedPageCounter.decrement();
+#endif
+
+    destroy();
+    ASSERT(!m_cachedMainFrame);
+}
+
+void CachedPage::restore(Page* page)
+{
+    ASSERT(m_cachedMainFrame);
+    ASSERT(page && page->mainFrame() && page->mainFrame() == m_cachedMainFrame->view()->frame());
+    ASSERT(!page->frameCount());
+
+    m_cachedMainFrame->open();
+    
+    // Restore the focus appearance for the focused element.
+    // 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.
+    Document* focusedDocument = page->focusController()->focusedOrMainFrame()->document();
+    if (Node* node = focusedDocument->focusedNode()) {
+        if (node->isElementNode())
+            static_cast<Element*>(node)->updateFocusAppearance(true);
+    }
+    
+    clear();
+}
+
+void CachedPage::clear()
+{
+    ASSERT(m_cachedMainFrame);
+    m_cachedMainFrame->clear();
+    m_cachedMainFrame = 0;
+}
+
+void CachedPage::destroy()
+{
+    if (m_cachedMainFrame)
+        m_cachedMainFrame->destroy();
+
+    m_cachedMainFrame = 0;
+}
+
+} // namespace WebCore