Refactor LinkStyle out of HTMLLinkElement

third_party/WebKit/Source/core/html/LinkStyle.cpp

Index: third_party/WebKit/Source/core/html/LinkStyle.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp b/third_party/WebKit/Source/core/html/LinkStyle.cpp
similarity index 54%
copy from third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
copy to third_party/WebKit/Source/core/html/LinkStyle.cpp
index 7b5cfd145bd2136c74b40fc4c2ef13be5512615f..b005d916dcdc822cd6e0d3419bf676959fc4fa00 100644
--- a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
+++ b/third_party/WebKit/Source/core/html/LinkStyle.cpp
@@ -1,65 +1,20 @@
-/*
- * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
- *           (C) 1999 Antti Koivisto (koivisto@kde.org)
- *           (C) 2001 Dirk Mueller (mueller@kde.org)
- * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
- * reserved.
- * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
- * Copyright (C) 2011 Google 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.
- */
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
-#include "core/html/HTMLLinkElement.h"
+#include "core/html/LinkStyle.h"
 
-#include "bindings/core/v8/ScriptEventListener.h"
-#include "core/HTMLNames.h"
-#include "core/css/MediaList.h"
-#include "core/css/MediaQueryEvaluator.h"
 #include "core/css/StyleSheetContents.h"
-#include "core/css/resolver/StyleResolver.h"
-#include "core/dom/Attribute.h"
-#include "core/dom/Document.h"
-#include "core/dom/StyleEngine.h"
-#include "core/dom/TaskRunnerHelper.h"
-#include "core/events/Event.h"
 #include "core/fetch/CSSStyleSheetResource.h"
-#include "core/fetch/FetchRequest.h"
-#include "core/fetch/ResourceFetcher.h"
-#include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/SubresourceIntegrity.h"
-#include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/CrossOriginAttribute.h"
-#include "core/html/LinkManifest.h"
-#include "core/html/imports/LinkImport.h"
-#include "core/inspector/ConsoleMessage.h"
-#include "core/loader/FrameLoader.h"
+#include "core/html/HTMLLinkElement.h"
 #include "core/loader/FrameLoaderClient.h"
-#include "core/loader/NetworkHintsInterface.h"
-#include "core/origin_trials/OriginTrials.h"
-#include "core/style/StyleInheritedData.h"
 #include "platform/ContentType.h"
 #include "platform/Histogram.h"
 #include "platform/MIMETypeRegistry.h"
-#include "platform/RuntimeEnabledFeatures.h"
-#include "public/platform/WebIconSizesParser.h"
-#include "public/platform/WebSize.h"
-#include "wtf/StdLibExtras.h"
 
 namespace blink {
 
@@ -71,319 +26,6 @@ static bool styleSheetTypeIsSupported(const String& type) {
          MIMETypeRegistry::isSupportedStyleSheetMIMEType(trimmedType);
 }
 
-inline HTMLLinkElement::HTMLLinkElement(Document& document,
-                                        bool createdByParser)
-    : HTMLElement(linkTag, document),
-      m_linkLoader(LinkLoader::create(this)),
-      m_sizes(DOMTokenList::create(this)),
-      m_relList(RelList::create(this)),
-      m_createdByParser(createdByParser) {}
-
-HTMLLinkElement* HTMLLinkElement::create(Document& document,
-                                         bool createdByParser) {
-  return new HTMLLinkElement(document, createdByParser);
-}
-
-HTMLLinkElement::~HTMLLinkElement() {}
-
-void HTMLLinkElement::parseAttribute(const QualifiedName& name,
-                                     const AtomicString& oldValue,
-                                     const AtomicString& value) {
-  if (name == relAttr) {
-    m_relAttribute = LinkRelAttribute(value);
-    m_relList->setRelValues(value);
-    process();
-  } else if (name == hrefAttr) {
-    // Log href attribute before logging resource fetching in process().
-    logUpdateAttributeIfIsolatedWorldAndInDocument("link", hrefAttr, oldValue,
-                                                   value);
-    process();
-  } else if (name == typeAttr) {
-    m_type = value;
-    process();
-  } else if (name == asAttr) {
-    m_as = value;
-    process();
-  } else if (name == sizesAttr) {
-    m_sizes->setValue(value);
-  } else if (name == mediaAttr) {
-    m_media = value.lower();
-    process();
-  } else if (name == scopeAttr) {
-    m_scope = value;
-    process();
-  } else if (name == disabledAttr) {
-    UseCounter::count(document(), UseCounter::HTMLLinkElementDisabled);
-    if (LinkStyle* link = linkStyle())
-      link->setDisabledState(!value.isNull());
-  } else {
-    if (name == titleAttr) {
-      if (LinkStyle* link = linkStyle())
-        link->setSheetTitle(value, StyleEngine::UpdateActiveSheets);
-    }
-
-    HTMLElement::parseAttribute(name, oldValue, value);
-  }
-}
-
-bool HTMLLinkElement::shouldLoadLink() {
-  return isInDocumentTree() || (isConnected() && m_relAttribute.isStyleSheet());
-}
-
-bool HTMLLinkElement::loadLink(const String& type,
-                               const String& as,
-                               const String& media,
-                               const KURL& url) {
-  return m_linkLoader->loadLink(
-      m_relAttribute,
-      crossOriginAttributeValue(fastGetAttribute(HTMLNames::crossoriginAttr)),
-      type, as, media, url, document(), NetworkHintsInterfaceImpl());
-}
-
-LinkResource* HTMLLinkElement::linkResourceToProcess() {
-  if (!shouldLoadLink()) {
-    DCHECK(!linkStyle() || !linkStyle()->hasSheet());
-    return nullptr;
-  }
-
-  if (!m_link) {
-    if (m_relAttribute.isImport()) {
-      m_link = LinkImport::create(this);
-    } else if (m_relAttribute.isManifest()) {
-      m_link = LinkManifest::create(this);
-    } else if (m_relAttribute.isServiceWorker() &&
-               OriginTrials::linkServiceWorkerEnabled(getExecutionContext())) {
-      if (document().frame())
-        m_link = document()
-                     .frame()
-                     ->loader()
-                     .client()
-                     ->createServiceWorkerLinkResource(this);
-    } else {
-      LinkStyle* link = LinkStyle::create(this);
-      if (fastHasAttribute(disabledAttr)) {
-        UseCounter::count(document(), UseCounter::HTMLLinkElementDisabled);
-        link->setDisabledState(true);
-      }
-      m_link = link;
-    }
-  }
-
-  return m_link.get();
-}
-
-LinkStyle* HTMLLinkElement::linkStyle() const {
-  if (!m_link || m_link->type() != LinkResource::Style)
-    return nullptr;
-  return static_cast<LinkStyle*>(m_link.get());
-}
-
-LinkImport* HTMLLinkElement::linkImport() const {
-  if (!m_link || m_link->type() != LinkResource::Import)
-    return nullptr;
-  return static_cast<LinkImport*>(m_link.get());
-}
-
-Document* HTMLLinkElement::import() const {
-  if (LinkImport* link = linkImport())
-    return link->importedDocument();
-  return nullptr;
-}
-
-void HTMLLinkElement::process() {
-  if (LinkResource* link = linkResourceToProcess())
-    link->process();
-}
-
-Node::InsertionNotificationRequest HTMLLinkElement::insertedInto(
-    ContainerNode* insertionPoint) {
-  HTMLElement::insertedInto(insertionPoint);
-  logAddElementIfIsolatedWorldAndInDocument("link", relAttr, hrefAttr);
-  if (!insertionPoint->isConnected())
-    return InsertionDone;
-  DCHECK(isConnected());
-  if (!shouldLoadLink()) {
-    DCHECK(isInShadowTree());
-    String message = "HTML element <link> is ignored in shadow tree.";
-    document().addConsoleMessage(
-        ConsoleMessage::create(JSMessageSource, WarningMessageLevel, message));
-    return InsertionDone;
-  }
-
-  document().styleEngine().addStyleSheetCandidateNode(*this);
-
-  process();
-
-  if (m_link)
-    m_link->ownerInserted();
-
-  return InsertionDone;
-}
-
-void HTMLLinkElement::removedFrom(ContainerNode* insertionPoint) {
-  // Store the result of isConnected() here before Node::removedFrom(..) clears
-  // the flags.
-  bool wasConnected = isConnected();
-  HTMLElement::removedFrom(insertionPoint);
-  if (!insertionPoint->isConnected())
-    return;
-
-  m_linkLoader->released();
-
-  if (!wasConnected) {
-    DCHECK(!linkStyle() || !linkStyle()->hasSheet());
-    return;
-  }
-  document().styleEngine().removeStyleSheetCandidateNode(*this);
-
-  StyleSheet* removedSheet = sheet();
-
-  if (m_link)
-    m_link->ownerRemoved();
-
-  document().styleEngine().setNeedsActiveStyleUpdate(removedSheet,
-                                                     FullStyleUpdate);
-}
-
-void HTMLLinkElement::finishParsingChildren() {
-  m_createdByParser = false;
-  HTMLElement::finishParsingChildren();
-}
-
-bool HTMLLinkElement::styleSheetIsLoading() const {
-  return linkStyle() && linkStyle()->styleSheetIsLoading();
-}
-
-void HTMLLinkElement::linkLoaded() {
-  dispatchEvent(Event::create(EventTypeNames::load));
-}
-
-void HTMLLinkElement::linkLoadingErrored() {
-  dispatchEvent(Event::create(EventTypeNames::error));
-}
-
-void HTMLLinkElement::didStartLinkPrerender() {
-  dispatchEvent(Event::create(EventTypeNames::webkitprerenderstart));
-}
-
-void HTMLLinkElement::didStopLinkPrerender() {
-  dispatchEvent(Event::create(EventTypeNames::webkitprerenderstop));
-}
-
-void HTMLLinkElement::didSendLoadForLinkPrerender() {
-  dispatchEvent(Event::create(EventTypeNames::webkitprerenderload));
-}
-
-void HTMLLinkElement::didSendDOMContentLoadedForLinkPrerender() {
-  dispatchEvent(Event::create(EventTypeNames::webkitprerenderdomcontentloaded));
-}
-
-void HTMLLinkElement::valueWasSet() {
-  setSynchronizedLazyAttribute(HTMLNames::sizesAttr, m_sizes->value());
-  WebVector<WebSize> webIconSizes =
-      WebIconSizesParser::parseIconSizes(m_sizes->value());
-  m_iconSizes.resize(webIconSizes.size());
-  for (size_t i = 0; i < webIconSizes.size(); ++i)
-    m_iconSizes[i] = webIconSizes[i];
-  process();
-}
-
-bool HTMLLinkElement::sheetLoaded() {
-  DCHECK(linkStyle());
-  return linkStyle()->sheetLoaded();
-}
-
-void HTMLLinkElement::notifyLoadedSheetAndAllCriticalSubresources(
-    LoadedSheetErrorStatus errorStatus) {
-  DCHECK(linkStyle());
-  linkStyle()->notifyLoadedSheetAndAllCriticalSubresources(errorStatus);
-}
-
-void HTMLLinkElement::dispatchPendingEvent(
-    std::unique_ptr<IncrementLoadEventDelayCount>) {
-  DCHECK(m_link);
-  if (m_link->hasLoaded())
-    linkLoaded();
-  else
-    linkLoadingErrored();
-}
-
-void HTMLLinkElement::scheduleEvent() {
-  TaskRunnerHelper::get(TaskType::DOMManipulation, &document())
-      ->postTask(
-          BLINK_FROM_HERE,
-          WTF::bind(&HTMLLinkElement::dispatchPendingEvent,
-                    wrapPersistent(this),
-                    passed(IncrementLoadEventDelayCount::create(document()))));
-}
-
-void HTMLLinkElement::startLoadingDynamicSheet() {
-  DCHECK(linkStyle());
-  linkStyle()->startLoadingDynamicSheet();
-}
-
-bool HTMLLinkElement::isURLAttribute(const Attribute& attribute) const {
-  return attribute.name().localName() == hrefAttr ||
-         HTMLElement::isURLAttribute(attribute);
-}
-
-bool HTMLLinkElement::hasLegalLinkAttribute(const QualifiedName& name) const {
-  return name == hrefAttr || HTMLElement::hasLegalLinkAttribute(name);
-}
-
-const QualifiedName& HTMLLinkElement::subResourceAttributeName() const {
-  // If the link element is not css, ignore it.
-  if (equalIgnoringCase(getAttribute(typeAttr), "text/css")) {
-    // FIXME: Add support for extracting links of sub-resources which
-    // are inside style-sheet such as @import, @font-face, url(), etc.
-    return hrefAttr;
-  }
-  return HTMLElement::subResourceAttributeName();
-}
-
-KURL HTMLLinkElement::href() const {
-  return document().completeURL(getAttribute(hrefAttr));
-}
-
-const AtomicString& HTMLLinkElement::rel() const {
-  return getAttribute(relAttr);
-}
-
-const AtomicString& HTMLLinkElement::type() const {
-  return getAttribute(typeAttr);
-}
-
-bool HTMLLinkElement::async() const {
-  return fastHasAttribute(HTMLNames::asyncAttr);
-}
-
-IconType HTMLLinkElement::getIconType() const {
-  return m_relAttribute.getIconType();
-}
-
-const Vector<IntSize>& HTMLLinkElement::iconSizes() const {
-  return m_iconSizes;
-}
-
-DOMTokenList* HTMLLinkElement::sizes() const {
-  return m_sizes.get();
-}
-
-DEFINE_TRACE(HTMLLinkElement) {
-  visitor->trace(m_link);
-  visitor->trace(m_sizes);
-  visitor->trace(m_linkLoader);
-  visitor->trace(m_relList);
-  HTMLElement::trace(visitor);
-  LinkLoaderClient::trace(visitor);
-  DOMTokenListObserver::trace(visitor);
-}
-
-DEFINE_TRACE_WRAPPERS(HTMLLinkElement) {
-  visitor->traceWrappers(m_relList);
-  HTMLElement::traceWrappers(visitor);
-}
-
 LinkStyle* LinkStyle::create(HTMLLinkElement* owner) {
   return new LinkStyle(owner);
 }
@@ -520,9 +162,10 @@ void LinkStyle::setCSSStyleSheet(
   styleSheet->notifyLoadedSheet(cachedStyleSheet);
   styleSheet->checkLoaded();
 
-  if (styleSheet->isCacheableForResource())
+  if (styleSheet->isCacheableForResource()) {
     const_cast<CSSStyleSheetResource*>(cachedStyleSheet)
         ->saveParsedStyleSheet(styleSheet);
+  }
   clearResource();
 }
 
@@ -656,9 +299,10 @@ void LinkStyle::process() {
     if (!document().contentSecurityPolicy()->allowImageFromSource(
             builder.url()))
       return;
-    if (document().frame() && document().frame()->loader().client())
+    if (document().frame() && document().frame()->loader().client()) {
       document().frame()->loader().client()->dispatchDidChangeIcons(
           m_owner->relAttribute().getIconType());
+    }
   }
 
   if (!m_owner->loadLink(type, as, media, builder.url()))
@@ -680,9 +324,10 @@ void LinkStyle::process() {
 
     String title = m_owner->title();
     if (!title.isEmpty() && !m_owner->isAlternate() &&
-        m_disabledState != EnabledViaScript && m_owner->isInDocumentTree())
+        m_disabledState != EnabledViaScript && m_owner->isInDocumentTree()) {
       document().styleEngine().setPreferredStylesheetSetNameIfNotSet(
           title, StyleEngine::DontUpdateActiveSheets);
+    }
 
     bool mediaQueryMatches = true;
     LocalFrame* frame = loadingFrame();
@@ -752,9 +397,10 @@ void LinkStyle::setSheetTitle(
     return;
 
   KURL href = m_owner->getNonEmptyURLAttribute(hrefAttr);
-  if (href.isValid() && !href.isEmpty())
+  if (href.isValid() && !href.isEmpty()) {
     document().styleEngine().setPreferredStylesheetSetNameIfNotSet(
         title, updateActiveSheets);
+  }
 }
 
 void LinkStyle::ownerRemoved() {