196 lines
6.8 KiB
C++
196 lines
6.8 KiB
C++
/*
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* Copyright (C) 2010-2011, 2016 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "WebBackForwardListItem.h"
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#include "SuspendedPageProxy.h"
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#include "WebBackForwardCache.h"
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#include "WebBackForwardCacheEntry.h"
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#include "WebProcessPool.h"
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#include "WebProcessProxy.h"
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#include <wtf/DebugUtilities.h>
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#include <wtf/URL.h>
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namespace WebKit {
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using namespace WebCore;
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Ref<WebBackForwardListItem> WebBackForwardListItem::create(BackForwardListItemState&& backForwardListItemState, WebPageProxyIdentifier pageID)
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{
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RELEASE_ASSERT(RunLoop::isMain());
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return adoptRef(*new WebBackForwardListItem(WTFMove(backForwardListItemState), pageID));
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}
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WebBackForwardListItem::WebBackForwardListItem(BackForwardListItemState&& backForwardListItemState, WebPageProxyIdentifier pageID)
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: m_itemState(WTFMove(backForwardListItemState))
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, m_pageID(pageID)
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, m_lastProcessIdentifier(m_itemState.identifier.processIdentifier)
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{
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auto result = allItems().add(m_itemState.identifier, this);
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ASSERT_UNUSED(result, result.isNewEntry);
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}
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WebBackForwardListItem::~WebBackForwardListItem()
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{
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RELEASE_ASSERT(RunLoop::isMain());
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ASSERT(allItems().get(m_itemState.identifier) == this);
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allItems().remove(m_itemState.identifier);
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removeFromBackForwardCache();
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}
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HashMap<BackForwardItemIdentifier, WebBackForwardListItem*>& WebBackForwardListItem::allItems()
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{
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RELEASE_ASSERT(RunLoop::isMain());
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static NeverDestroyed<HashMap<BackForwardItemIdentifier, WebBackForwardListItem*>> items;
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return items;
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}
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WebBackForwardListItem* WebBackForwardListItem::itemForID(const BackForwardItemIdentifier& identifier)
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{
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return allItems().get(identifier);
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}
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static const FrameState* childItemWithDocumentSequenceNumber(const FrameState& frameState, int64_t number)
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{
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for (const auto& child : frameState.children) {
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if (child.documentSequenceNumber == number)
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return &child;
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}
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return nullptr;
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}
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static const FrameState* childItemWithTarget(const FrameState& frameState, const String& target)
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{
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for (const auto& child : frameState.children) {
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if (child.target == target)
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return &child;
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}
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return nullptr;
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}
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static bool documentTreesAreEqual(const FrameState& a, const FrameState& b)
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{
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if (a.documentSequenceNumber != b.documentSequenceNumber)
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return false;
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if (a.children.size() != b.children.size())
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return false;
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for (const auto& child : a.children) {
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const FrameState* otherChild = childItemWithDocumentSequenceNumber(b, child.documentSequenceNumber);
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if (!otherChild || !documentTreesAreEqual(child, *otherChild))
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return false;
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}
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return true;
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}
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bool WebBackForwardListItem::itemIsInSameDocument(const WebBackForwardListItem& other) const
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{
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if (m_pageID != other.m_pageID)
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return false;
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// The following logic must be kept in sync with WebCore::HistoryItem::shouldDoSameDocumentNavigationTo().
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const FrameState& mainFrameState = m_itemState.pageState.mainFrameState;
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const FrameState& otherMainFrameState = other.m_itemState.pageState.mainFrameState;
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if (mainFrameState.stateObjectData || otherMainFrameState.stateObjectData)
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return mainFrameState.documentSequenceNumber == otherMainFrameState.documentSequenceNumber;
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URL url = URL({ }, mainFrameState.urlString);
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URL otherURL = URL({ }, otherMainFrameState.urlString);
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if ((url.hasFragmentIdentifier() || otherURL.hasFragmentIdentifier()) && equalIgnoringFragmentIdentifier(url, otherURL))
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return mainFrameState.documentSequenceNumber == otherMainFrameState.documentSequenceNumber;
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return documentTreesAreEqual(mainFrameState, otherMainFrameState);
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}
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static bool hasSameFrames(const FrameState& a, const FrameState& b)
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{
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if (a.target != b.target)
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return false;
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if (a.children.size() != b.children.size())
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return false;
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for (const auto& child : a.children) {
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if (!childItemWithTarget(b, child.target))
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return false;
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}
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return true;
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}
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bool WebBackForwardListItem::itemIsClone(const WebBackForwardListItem& other)
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{
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// The following logic must be kept in sync with WebCore::HistoryItem::itemsAreClones().
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if (this == &other)
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return false;
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const FrameState& mainFrameState = m_itemState.pageState.mainFrameState;
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const FrameState& otherMainFrameState = other.m_itemState.pageState.mainFrameState;
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if (mainFrameState.itemSequenceNumber != otherMainFrameState.itemSequenceNumber)
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return false;
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return hasSameFrames(mainFrameState, otherMainFrameState);
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}
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void WebBackForwardListItem::wasRemovedFromBackForwardList()
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{
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removeFromBackForwardCache();
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}
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void WebBackForwardListItem::removeFromBackForwardCache()
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{
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if (m_backForwardCacheEntry)
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m_backForwardCacheEntry->backForwardCache().removeEntry(*this);
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ASSERT(!m_backForwardCacheEntry);
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}
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void WebBackForwardListItem::setBackForwardCacheEntry(std::unique_ptr<WebBackForwardCacheEntry>&& backForwardCacheEntry)
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{
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m_backForwardCacheEntry = WTFMove(backForwardCacheEntry);
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}
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SuspendedPageProxy* WebBackForwardListItem::suspendedPage() const
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{
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return m_backForwardCacheEntry ? m_backForwardCacheEntry->suspendedPage() : nullptr;
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}
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#if !LOG_DISABLED
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const char* WebBackForwardListItem::loggingString()
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{
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return debugString("Back/forward item ID ", itemID().logString(), ", original URL ", originalURL(), ", current URL ", url(), m_backForwardCacheEntry ? "(has a back/forward cache entry)" : "");
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}
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#endif // !LOG_DISABLED
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} // namespace WebKit
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