Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 134 insertions, 0 deletions

diff --git a/Source/WebCore/loader/LinkLoader.cpp b/Source/WebCore/loader/LinkLoader.cpp
new file mode 100644
index 000000000..51d3d8f7d
--- /dev/null
+++ b/Source/WebCore/loader/LinkLoader.cpp
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+/*
+ * Copyright (C) 2011 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 "LinkLoader.h"
+
+#include "CSSStyleSelector.h"
+#include "CSSStyleSheet.h"
+#include "CachedCSSStyleSheet.h"
+#include "CachedResourceLoader.h"
+#include "ContainerNode.h"
+#include "Document.h"
+#include "Frame.h"
+#include "FrameView.h"
+#include "LinkRelAttribute.h"
+#include "ResourceHandle.h"
+#include "Settings.h"
+
+namespace WebCore {
+
+LinkLoader::LinkLoader(LinkLoaderClient* client)
+    : m_client(client)
+    , m_linkLoadTimer(this, &LinkLoader::linkLoadTimerFired)
+    , m_linkLoadingErrorTimer(this, &LinkLoader::linkLoadingErrorTimerFired)
+{
+}
+
+LinkLoader::~LinkLoader()
+{
+    if (m_cachedLinkResource)
+        m_cachedLinkResource->removeClient(this);
+}
+
+void LinkLoader::linkLoadTimerFired(Timer<LinkLoader>* timer)
+{
+    ASSERT_UNUSED(timer, timer == &m_linkLoadTimer);
+    m_client->linkLoaded();
+}
+
+void LinkLoader::linkLoadingErrorTimerFired(Timer<LinkLoader>* timer)
+{
+    ASSERT_UNUSED(timer, timer == &m_linkLoadingErrorTimer);
+    m_client->linkLoadingErrored();
+}
+
+void LinkLoader::notifyFinished(CachedResource* resource)
+{
+    ASSERT_UNUSED(resource, m_cachedLinkResource.get() == resource);
+
+    if (m_cachedLinkResource->errorOccurred())
+        m_linkLoadingErrorTimer.startOneShot(0);
+    else 
+        m_linkLoadTimer.startOneShot(0);
+
+    m_cachedLinkResource->removeClient(this);
+    m_cachedLinkResource = 0;
+}
+
+bool LinkLoader::loadLink(const LinkRelAttribute& relAttribute, const String& type,
+                          const String& sizes, const KURL& href, Document* document)
+{
+    // We'll record this URL per document, even if we later only use it in top level frames
+    if (relAttribute.m_iconType != InvalidIcon && href.isValid() && !href.isEmpty()) {
+        if (!m_client->shouldLoadLink()) 
+            return false;
+        document->addIconURL(href.string(), type, sizes, relAttribute.m_iconType);
+    }
+
+    if (relAttribute.m_isDNSPrefetch) {
+        Settings* settings = document->settings();
+        // FIXME: The href attribute of the link element can be in "//hostname" form, and we shouldn't attempt
+        // to complete that as URL <https://bugs.webkit.org/show_bug.cgi?id=48857>.
+        if (settings && settings->dnsPrefetchingEnabled() && href.isValid() && !href.isEmpty())
+            ResourceHandle::prepareForURL(href);
+    }
+
+#if ENABLE(LINK_PREFETCH)
+    if ((relAttribute.m_isLinkPrefetch || relAttribute.m_isLinkPrerender || relAttribute.m_isLinkSubresource) && href.isValid() && document->frame()) {
+        if (!m_client->shouldLoadLink())
+            return false;
+        ResourceLoadPriority priority = ResourceLoadPriorityUnresolved;
+        CachedResource::Type type = CachedResource::LinkPrefetch;
+        // We only make one request to the cachedresourcelodaer if multiple rel types are
+        // specified, 
+        if (relAttribute.m_isLinkSubresource) {
+            priority = ResourceLoadPriorityLow;
+            type = CachedResource::LinkSubresource;
+        } else if (relAttribute.m_isLinkPrerender)
+            type = CachedResource::LinkPrerender;
+
+        ResourceRequest linkRequest(document->completeURL(href));
+        
+        if (m_cachedLinkResource) {
+            m_cachedLinkResource->removeClient(this);
+            m_cachedLinkResource = 0;
+        }
+        m_cachedLinkResource = document->cachedResourceLoader()->requestLinkResource(type, linkRequest, priority);
+        if (m_cachedLinkResource)
+            m_cachedLinkResource->addClient(this);
+    }
+#endif
+    return true;
+}
+
+
+}