203 lines
6.4 KiB
C++
203 lines
6.4 KiB
C++
/*
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* Copyright (C) 2006, 2007, 2008, 2014 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CachedPage.h"
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#include "Document.h"
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#include "Element.h"
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#include "FocusController.h"
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#include "Frame.h"
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#include "FrameLoader.h"
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#include "FrameLoaderClient.h"
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#include "FrameView.h"
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#include "HistoryController.h"
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#include "HistoryItem.h"
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#include "Node.h"
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#include "Page.h"
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#include "PageTransitionEvent.h"
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#include "ScriptDisallowedScope.h"
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#include "SelectionRestorationMode.h"
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#include "Settings.h"
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#include "VisitedLinkState.h"
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#include <wtf/RefCountedLeakCounter.h>
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#include <wtf/StdLibExtras.h>
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#if PLATFORM(IOS_FAMILY)
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#include "FrameSelection.h"
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#endif
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namespace WebCore {
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using namespace JSC;
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DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, cachedPageCounter, ("CachedPage"));
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CachedPage::CachedPage(Page& page)
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: m_page(page)
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, m_expirationTime(MonotonicTime::now() + page.settings().backForwardCacheExpirationInterval())
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, m_cachedMainFrame(makeUnique<CachedFrame>(page.mainFrame()))
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#if ENABLE(RESOURCE_LOAD_STATISTICS)
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, m_loadedSubresourceDomains(page.mainFrame().loader().client().loadedSubresourceDomains())
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#endif
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{
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#ifndef NDEBUG
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cachedPageCounter.increment();
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#endif
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}
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CachedPage::~CachedPage()
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{
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#ifndef NDEBUG
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cachedPageCounter.decrement();
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#endif
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if (m_cachedMainFrame)
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m_cachedMainFrame->destroy();
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}
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static void firePageShowAndPopStateEvents(Page& page)
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{
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// Dispatching JavaScript events can cause frame destruction.
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auto& mainFrame = page.mainFrame();
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Vector<Ref<Frame>> childFrames;
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for (auto* child = mainFrame.tree().traverseNextInPostOrder(CanWrap::Yes); child; child = child->tree().traverseNextInPostOrder(CanWrap::No))
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childFrames.append(*child);
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for (auto& child : childFrames) {
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if (!child->tree().isDescendantOf(&mainFrame))
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continue;
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auto* document = child->document();
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if (!document)
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continue;
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// This takes care of firing the visibilitychange event and making sure the document is reported as visible.
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document->setVisibilityHiddenDueToDismissal(false);
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document->dispatchPageshowEvent(PageshowEventPersisted);
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auto* historyItem = child->loader().history().currentItem();
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if (historyItem && historyItem->stateObject())
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document->dispatchPopstateEvent(historyItem->stateObject());
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}
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}
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class CachedPageRestorationScope {
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public:
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CachedPageRestorationScope(Page& page)
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: m_page(page)
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{
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m_page.setIsRestoringCachedPage(true);
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}
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~CachedPageRestorationScope()
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{
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m_page.setIsRestoringCachedPage(false);
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}
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private:
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Page& m_page;
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};
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void CachedPage::restore(Page& page)
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{
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ASSERT(m_cachedMainFrame);
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ASSERT(m_cachedMainFrame->view()->frame().isMainFrame());
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ASSERT(!page.subframeCount());
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CachedPageRestorationScope restorationScope(page);
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m_cachedMainFrame->open();
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// Restore the focus appearance for the focused element.
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// 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.
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Document* focusedDocument = page.focusController().focusedOrMainFrame().document();
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if (Element* element = focusedDocument->focusedElement()) {
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#if PLATFORM(IOS_FAMILY)
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// We don't want focused nodes changing scroll position when restoring from the cache
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// as it can cause ugly jumps before we manage to restore the cached position.
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page.mainFrame().selection().suppressScrolling();
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bool hadProhibitsScrolling = false;
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FrameView* frameView = page.mainFrame().view();
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if (frameView) {
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hadProhibitsScrolling = frameView->prohibitsScrolling();
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frameView->setProhibitsScrolling(true);
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}
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#endif
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element->updateFocusAppearance(SelectionRestorationMode::RestoreOrSelectAll);
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#if PLATFORM(IOS_FAMILY)
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if (frameView)
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frameView->setProhibitsScrolling(hadProhibitsScrolling);
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page.mainFrame().selection().restoreScrolling();
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#endif
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}
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if (m_needsDeviceOrPageScaleChanged)
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page.mainFrame().deviceOrPageScaleFactorChanged();
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page.setNeedsRecalcStyleInAllFrames();
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#if ENABLE(VIDEO)
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if (m_needsCaptionPreferencesChanged)
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page.captionPreferencesChanged();
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#endif
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if (m_needsUpdateContentsSize) {
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if (FrameView* frameView = page.mainFrame().view())
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frameView->updateContentsSize();
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}
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firePageShowAndPopStateEvents(page);
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#if ENABLE(RESOURCE_LOAD_STATISTICS)
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for (auto& domain : m_loadedSubresourceDomains)
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page.mainFrame().loader().client().didLoadFromRegistrableDomain(WTFMove(domain));
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#endif
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clear();
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}
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void CachedPage::clear()
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{
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ASSERT(m_cachedMainFrame);
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m_cachedMainFrame->clear();
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m_cachedMainFrame = nullptr;
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#if ENABLE(VIDEO)
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m_needsCaptionPreferencesChanged = false;
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#endif
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m_needsDeviceOrPageScaleChanged = false;
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m_needsUpdateContentsSize = false;
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#if ENABLE(RESOURCE_LOAD_STATISTICS)
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m_loadedSubresourceDomains.clear();
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#endif
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}
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bool CachedPage::hasExpired() const
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{
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return MonotonicTime::now() > m_expirationTime;
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}
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} // namespace WebCore
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