WebBackForwardCacheEntry.cpp [plain text]
#include "config.h"
#include "WebBackForwardCacheEntry.h"
#include "Logging.h"
#include "SuspendedPageProxy.h"
#include "WebBackForwardCache.h"
#include "WebProcessMessages.h"
#include "WebProcessProxy.h"
namespace WebKit {
static const Seconds expirationDelay { 30_min };
WebBackForwardCacheEntry::WebBackForwardCacheEntry(WebBackForwardCache& backForwardCache, WebCore::BackForwardItemIdentifier backForwardItemID, WebCore::ProcessIdentifier processIdentifier, std::unique_ptr<SuspendedPageProxy>&& suspendedPage)
: m_backForwardCache(backForwardCache)
, m_processIdentifier(processIdentifier)
, m_backForwardItemID(backForwardItemID)
, m_suspendedPage(WTFMove(suspendedPage))
, m_expirationTimer(RunLoop::main(), this, &WebBackForwardCacheEntry::expirationTimerFired)
{
m_expirationTimer.startOneShot(expirationDelay);
}
WebBackForwardCacheEntry::~WebBackForwardCacheEntry()
{
if (m_backForwardItemID && !m_suspendedPage) {
auto& process = this->process();
process.sendWithAsyncReply(Messages::WebProcess::ClearCachedPage(m_backForwardItemID), [] { });
}
}
std::unique_ptr<SuspendedPageProxy> WebBackForwardCacheEntry::takeSuspendedPage()
{
ASSERT(m_suspendedPage);
m_backForwardItemID = { };
m_expirationTimer.stop();
return std::exchange(m_suspendedPage, nullptr);
}
WebProcessProxy& WebBackForwardCacheEntry::process() const
{
auto* process = WebProcessProxy::processForIdentifier(m_processIdentifier);
ASSERT(process);
ASSERT(!m_suspendedPage || process == &m_suspendedPage->process());
return *process;
}
void WebBackForwardCacheEntry::expirationTimerFired()
{
RELEASE_LOG(BackForwardCache, "%p - WebBackForwardCacheEntry::expirationTimerFired backForwardItemID: %s, hasSuspendedPage? %d", this, m_backForwardItemID.string().utf8().data(), !!m_suspendedPage);
ASSERT(m_backForwardItemID);
auto* item = WebBackForwardListItem::itemForID(m_backForwardItemID);
ASSERT(item);
m_backForwardCache.removeEntry(*item); }
}