| /* |
| * Copyright (C) 2019 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "WebBackForwardCache.h" |
| |
| #include "SuspendedPageProxy.h" |
| #include "WebBackForwardListItem.h" |
| #include "WebPageProxy.h" |
| #include "WebProcessProxy.h" |
| #include "WebsiteDataStore.h" |
| |
| namespace WebKit { |
| |
| WebBackForwardCache::WebBackForwardCache() = default; |
| |
| WebBackForwardCache::~WebBackForwardCache() = default; |
| |
| inline void WebBackForwardCache::removeOldestEntry() |
| { |
| ASSERT(!m_itemsWithCachedPage.isEmpty()); |
| removeEntry(*m_itemsWithCachedPage.first()); |
| } |
| |
| void WebBackForwardCache::setCapacity(unsigned capacity) |
| { |
| m_capacity = capacity; |
| while (size() > capacity) |
| removeOldestEntry(); |
| } |
| |
| void WebBackForwardCache::addEntry(WebBackForwardListItem& item, std::unique_ptr<SuspendedPageProxy>&& suspendedPage) |
| { |
| ASSERT(capacity()); |
| |
| item.setSuspendedPage(WTFMove(suspendedPage)); |
| m_itemsWithCachedPage.add(&item); |
| |
| if (size() > capacity()) |
| removeOldestEntry(); |
| ASSERT(size() <= capacity()); |
| } |
| |
| void WebBackForwardCache::removeEntry(WebBackForwardListItem& item) |
| { |
| ASSERT(m_itemsWithCachedPage.contains(&item)); |
| m_itemsWithCachedPage.remove(&item); |
| item.setSuspendedPage(nullptr); |
| } |
| |
| std::unique_ptr<SuspendedPageProxy> WebBackForwardCache::takeEntry(WebBackForwardListItem& item) |
| { |
| ASSERT(m_itemsWithCachedPage.contains(&item)); |
| m_itemsWithCachedPage.remove(&item); |
| return item.takeSuspendedPage(); |
| } |
| |
| void WebBackForwardCache::removeEntriesForProcess(WebProcessProxy& process) |
| { |
| removeEntriesMatching([&process](auto& item) { |
| return &item.suspendedPage()->process() == &process; |
| }); |
| } |
| |
| void WebBackForwardCache::removeEntriesForSession(PAL::SessionID sessionID) |
| { |
| removeEntriesMatching([sessionID](auto& item) { |
| return item.suspendedPage()->process().websiteDataStore().sessionID() == sessionID; |
| }); |
| } |
| |
| void WebBackForwardCache::removeEntriesForPage(WebPageProxy& page) |
| { |
| removeEntriesMatching([pageID = page.identifier()](auto& item) { |
| return item.pageID() == pageID; |
| }); |
| } |
| |
| void WebBackForwardCache::removeEntriesMatching(const Function<bool(WebBackForwardListItem&)>& matches) |
| { |
| for (auto it = m_itemsWithCachedPage.begin(); it != m_itemsWithCachedPage.end();) { |
| auto current = it; |
| ++it; |
| if (matches(**current)) { |
| (*current)->setSuspendedPage(nullptr); |
| m_itemsWithCachedPage.remove(current); |
| } |
| } |
| } |
| |
| void WebBackForwardCache::clear() |
| { |
| auto itemsWithCachedPage = WTFMove(m_itemsWithCachedPage); |
| for (auto* item : itemsWithCachedPage) |
| item->setSuspendedPage(nullptr); |
| } |
| |
| } // namespace WebKit. |