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-rw-r--r--WebCore/loader/CachedResource.cpp316
1 files changed, 0 insertions, 316 deletions
diff --git a/WebCore/loader/CachedResource.cpp b/WebCore/loader/CachedResource.cpp
deleted file mode 100644
index 6d0af9b..0000000
--- a/WebCore/loader/CachedResource.cpp
+++ /dev/null
@@ -1,316 +0,0 @@
-/*
- Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
- Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
- Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
- Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
- Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
-*/
-
-#include "config.h"
-#include "CachedResource.h"
-
-#include "Cache.h"
-#include "CachedResourceHandle.h"
-#include "DocLoader.h"
-#include "Frame.h"
-#include "FrameLoader.h"
-#include "KURL.h"
-#include "Request.h"
-#include "SystemTime.h"
-#include <wtf/RefCountedLeakCounter.h>
-#include <wtf/Vector.h>
-
-using namespace WTF;
-
-namespace WebCore {
-
-#ifndef NDEBUG
-static RefCountedLeakCounter cachedResourceLeakCounter("CachedResource");
-#endif
-
-CachedResource::CachedResource(const String& url, Type type)
- : m_url(url)
- , m_lastDecodedAccessTime(0)
- , m_sendResourceLoadCallbacks(true)
- , m_preloadCount(0)
- , m_preloadResult(PreloadNotReferenced)
- , m_requestedFromNetworkingLayer(false)
- , m_inCache(false)
- , m_loading(false)
- , m_docLoader(0)
- , m_handleCount(0)
- , m_resourceToRevalidate(0)
- , m_isBeingRevalidated(false)
- , m_expirationDate(0)
-{
-#ifndef NDEBUG
- cachedResourceLeakCounter.increment();
-#endif
-
- m_type = type;
- m_status = Pending;
- m_encodedSize = 0;
- m_decodedSize = 0;
- m_request = 0;
-
- m_accessCount = 0;
- m_inLiveDecodedResourcesList = false;
-
- m_nextInAllResourcesList = 0;
- m_prevInAllResourcesList = 0;
-
- m_nextInLiveResourcesList = 0;
- m_prevInLiveResourcesList = 0;
-
-#ifndef NDEBUG
- m_deleted = false;
- m_lruIndex = 0;
-#endif
- m_errorOccurred = false;
-}
-
-CachedResource::~CachedResource()
-{
- ASSERT(!inCache());
- ASSERT(!m_deleted);
- ASSERT(url().isNull() || cache()->resourceForURL(url()) != this);
-#ifndef NDEBUG
- m_deleted = true;
- cachedResourceLeakCounter.decrement();
-#endif
-
- if (m_resourceToRevalidate)
- m_resourceToRevalidate->m_isBeingRevalidated = false;
-
- if (m_docLoader)
- m_docLoader->removeCachedResource(this);
-}
-
-void CachedResource::load(DocLoader* docLoader, bool incremental, bool skipCanLoadCheck, bool sendResourceLoadCallbacks)
-{
- m_sendResourceLoadCallbacks = sendResourceLoadCallbacks;
- cache()->loader()->load(docLoader, this, incremental, skipCanLoadCheck, sendResourceLoadCallbacks);
- m_loading = true;
-}
-
-void CachedResource::finish()
-{
- m_status = Cached;
-}
-
-bool CachedResource::isExpired() const
-{
- if (!m_expirationDate)
- return false;
- time_t now = time(0);
- return difftime(now, m_expirationDate) >= 0;
-}
-
-void CachedResource::setResponse(const ResourceResponse& response)
-{
- m_response = response;
- m_expirationDate = response.expirationDate();
-}
-
-void CachedResource::setRequest(Request* request)
-{
- if (request && !m_request)
- m_status = Pending;
- m_request = request;
- if (canDelete() && !inCache())
- delete this;
-}
-
-void CachedResource::addClient(CachedResourceClient *c)
-{
- if (m_preloadResult == PreloadNotReferenced) {
- if (isLoaded())
- m_preloadResult = PreloadReferencedWhileComplete;
- else if (m_requestedFromNetworkingLayer)
- m_preloadResult = PreloadReferencedWhileLoading;
- else
- m_preloadResult = PreloadReferenced;
- }
- if (!hasClients() && inCache())
- cache()->addToLiveResourcesSize(this);
- m_clients.add(c);
-}
-
-void CachedResource::removeClient(CachedResourceClient *c)
-{
- ASSERT(m_clients.contains(c));
- m_clients.remove(c);
- if (canDelete() && !inCache())
- delete this;
- else if (!hasClients() && inCache()) {
- cache()->removeFromLiveResourcesSize(this);
- cache()->removeFromLiveDecodedResourcesList(this);
- allClientsRemoved();
- cache()->prune();
- }
-}
-
-void CachedResource::deleteIfPossible()
-{
- if (canDelete() && !inCache())
- delete this;
-}
-
-void CachedResource::setDecodedSize(unsigned size)
-{
- if (size == m_decodedSize)
- return;
-
- int delta = size - m_decodedSize;
-
- // The object must now be moved to a different queue, since its size has been changed.
- // We have to remove explicitly before updating m_decodedSize, so that we find the correct previous
- // queue.
- if (inCache())
- cache()->removeFromLRUList(this);
-
- m_decodedSize = size;
-
- if (inCache()) {
- // Now insert into the new LRU list.
- cache()->insertInLRUList(this);
-
- // Insert into or remove from the live decoded list if necessary.
- if (m_decodedSize && !m_inLiveDecodedResourcesList && hasClients())
- cache()->insertInLiveDecodedResourcesList(this);
- else if (!m_decodedSize && m_inLiveDecodedResourcesList)
- cache()->removeFromLiveDecodedResourcesList(this);
-
- // Update the cache's size totals.
- cache()->adjustSize(hasClients(), delta);
- }
-}
-
-void CachedResource::setEncodedSize(unsigned size)
-{
- if (size == m_encodedSize)
- return;
-
- // The size cannot ever shrink (unless it is being nulled out because of an error). If it ever does, assert.
- ASSERT(size == 0 || size >= m_encodedSize);
-
- int delta = size - m_encodedSize;
-
- // The object must now be moved to a different queue, since its size has been changed.
- // We have to remove explicitly before updating m_encodedSize, so that we find the correct previous
- // queue.
- if (inCache())
- cache()->removeFromLRUList(this);
-
- m_encodedSize = size;
-
- if (inCache()) {
- // Now insert into the new LRU list.
- cache()->insertInLRUList(this);
-
- // Update the cache's size totals.
- cache()->adjustSize(hasClients(), delta);
- }
-}
-
-void CachedResource::didAccessDecodedData(double timeStamp)
-{
- m_lastDecodedAccessTime = timeStamp;
-
- if (inCache()) {
- if (m_inLiveDecodedResourcesList) {
- cache()->removeFromLiveDecodedResourcesList(this);
- cache()->insertInLiveDecodedResourcesList(this);
- }
- cache()->prune();
- }
-}
-
-void CachedResource::setResourceToRevalidate(CachedResource* resource)
-{
- ASSERT(resource);
- ASSERT(!m_resourceToRevalidate);
- ASSERT(resource != this);
- ASSERT(!resource->m_isBeingRevalidated);
- ASSERT(m_handlesToRevalidate.isEmpty());
- ASSERT(resource->type() == type());
- resource->m_isBeingRevalidated = true;
- m_resourceToRevalidate = resource;
-}
-
-void CachedResource::clearResourceToRevalidate()
-{
- ASSERT(m_resourceToRevalidate);
- ASSERT(m_resourceToRevalidate->m_isBeingRevalidated);
- m_resourceToRevalidate->m_isBeingRevalidated = false;
- m_resourceToRevalidate->deleteIfPossible();
- m_handlesToRevalidate.clear();
- m_resourceToRevalidate = 0;
- deleteIfPossible();
-}
-
-void CachedResource::switchClientsToRevalidatedResource()
-{
- ASSERT(m_resourceToRevalidate);
- ASSERT(!inCache());
-
- HashSet<CachedResourceHandleBase*>::iterator end = m_handlesToRevalidate.end();
- for (HashSet<CachedResourceHandleBase*>::iterator it = m_handlesToRevalidate.begin(); it != end; ++it) {
- CachedResourceHandleBase* handle = *it;
- handle->m_resource = m_resourceToRevalidate;
- m_resourceToRevalidate->registerHandle(handle);
- --m_handleCount;
- }
- ASSERT(!m_handleCount);
- m_handlesToRevalidate.clear();
-
- Vector<CachedResourceClient*> clientsToMove;
- HashCountedSet<CachedResourceClient*>::iterator end2 = m_clients.end();
- for (HashCountedSet<CachedResourceClient*>::iterator it = m_clients.begin(); it != end2; ++it) {
- CachedResourceClient* client = it->first;
- unsigned count = it->second;
- while (count) {
- clientsToMove.append(client);
- --count;
- }
- }
- // Equivalent of calling removeClient() for all clients
- m_clients.clear();
-
- unsigned moveCount = clientsToMove.size();
- for (unsigned n = 0; n < moveCount; ++n)
- m_resourceToRevalidate->addClient(clientsToMove[n]);
-}
-
-bool CachedResource::canUseCacheValidator() const
-{
- return !m_loading && (!m_response.httpHeaderField("Last-Modified").isEmpty() || !m_response.httpHeaderField("ETag").isEmpty());
-}
-
-bool CachedResource::mustRevalidate(CachePolicy cachePolicy) const
-{
- if (m_loading)
- return false;
- String cacheControl = m_response.httpHeaderField("Cache-Control");
- // FIXME: It would be better to tokenize the field.
- if (cachePolicy == CachePolicyCache)
- return !cacheControl.isEmpty() && (cacheControl.contains("no-cache", false) || (isExpired() && cacheControl.contains("must-revalidate", false)));
- return isExpired() || cacheControl.contains("no-cache", false);
-}
-
-}