Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 173 matching lines @@
 StyleResolver::~StyleResolver() {}
 
 void StyleResolver::dispose() {
   m_matchedPropertiesCache.clear();
 }
 
 void StyleResolver::setRuleUsageTracker(StyleRuleUsageTracker* tracker) {
   m_tracker = tracker;
 }
 
-void StyleResolver::lazyAppendAuthorStyleSheets(
-    unsigned firstNew,
-    const HeapVector<Member<CSSStyleSheet>>& styleSheets) {
-  unsigned size = styleSheets.size();
-  for (unsigned i = firstNew; i < size; ++i)
-    m_pendingStyleSheets.add(styleSheets[i].get());
-}
-
-void StyleResolver::removePendingAuthorStyleSheets(
-    const HeapVector<Member<CSSStyleSheet>>& styleSheets) {
-  for (unsigned i = 0; i < styleSheets.size(); ++i)
-    m_pendingStyleSheets.remove(styleSheets[i].get());
-}
-
-void StyleResolver::appendCSSStyleSheet(CSSStyleSheet& cssSheet) {
-  DCHECK(!cssSheet.disabled());
-  DCHECK(cssSheet.ownerDocument());
-  DCHECK(cssSheet.ownerNode());
-  DCHECK(isHTMLStyleElement(cssSheet.ownerNode()) ||
-         isSVGStyleElement(cssSheet.ownerNode()) ||
-         cssSheet.ownerNode()->isConnected());
-
-  TreeScope* treeScope = &cssSheet.ownerNode()->treeScope();
-  // TODO(rune@opera.com): This is a workaround for crbug.com/559292
-  // when we're in the middle of removing a subtree with a style element
-  // and the treescope has been changed but inDocument and isInShadowTree
-  // are not.
-  //
-  // This check can be removed when crbug.com/567021 is fixed.
-  if (cssSheet.ownerNode()->isInShadowTree() &&
-      treeScope->rootNode().isDocumentNode())
-    return;
-
-  // Sheets in the document scope of HTML imports apply to the main document
-  // (m_document), so we override it for all document scoped sheets.
-  if (treeScope->rootNode().isDocumentNode())
-    treeScope = m_document;
-  treeScope->ensureScopedStyleResolver().appendCSSStyleSheet(cssSheet);
-}
-
-void StyleResolver::appendPendingAuthorStyleSheets() {
-  for (const auto& styleSheet : m_pendingStyleSheets)
-    appendCSSStyleSheet(*styleSheet);
-
-  m_pendingStyleSheets.clear();
-}
-
-void StyleResolver::appendAuthorStyleSheets(
-    const HeapVector<Member<CSSStyleSheet>>& styleSheets) {
-  // This handles sheets added to the end of the stylesheet list only. In other
-  // cases the style resolver needs to be reconstructed. To handle insertions
-  // too the rule order numbers would need to be updated.
-  for (const auto& styleSheet : styleSheets)
-    appendCSSStyleSheet(*styleSheet);
-}
-
 void StyleResolver::addToStyleSharingList(Element& element) {
   DCHECK(RuntimeEnabledFeatures::styleSharingEnabled());
   // Never add elements to the style sharing list if we're not in a recalcStyle,
   // otherwise we could leave stale pointers in there.
   if (!document().inStyleRecalc())
     return;
   INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(), sharedStyleCandidates,
                                 1);
   StyleSharingList& list = styleSharingList();
   if (list.size() >= styleSharingListSize)
@@ skipping 377 matching lines @@
   state.elementStyleResources().loadPendingResources(state.style());
 }
 
 PassRefPtr<ComputedStyle> StyleResolver::styleForElement(
     Element* element,
     const ComputedStyle* defaultParent,
     StyleSharingBehavior sharingBehavior,
     RuleMatchingBehavior matchingBehavior) {
   DCHECK(document().frame());
   DCHECK(document().settings());
-  DCHECK(!hasPendingAuthorStyleSheets());
 
   // Once an element has a layoutObject, we don't try to destroy it, since
   // otherwise the layoutObject will vanish if a style recalc happens during
   // loading.
   if (sharingBehavior == AllowStyleSharing && !document().isRenderingReady() &&
       !element->layoutObject()) {
     if (!s_styleNotYetAvailable) {
       s_styleNotYetAvailable = ComputedStyle::create().leakRef();
       s_styleNotYetAvailable->setDisplay(EDisplay::None);
       s_styleNotYetAvailable->font().update(
@@ skipping 320 matching lines @@
 
   if (PseudoElement* pseudoElement =
           element->pseudoElement(pseudoStyleRequest.pseudoId))
     setAnimationUpdateIfNeeded(state, *pseudoElement);
 
   // Now return the style.
   return state.takeStyle();
 }
 
 PassRefPtr<ComputedStyle> StyleResolver::styleForPage(int pageIndex) {
-  DCHECK(!hasPendingAuthorStyleSheets());
   // m_rootElementStyle will be set to the document style.
   StyleResolverState state(document(), document().documentElement());
 
   RefPtr<ComputedStyle> style = ComputedStyle::create();
   const ComputedStyle* rootElementStyle = state.rootElementStyle()
                                               ? state.rootElementStyle()
                                               : document().computedStyle();
   DCHECK(rootElementStyle);
   style->inheritFrom(*rootElementStyle);
   state.setStyle(style.release());
@@ skipping 581 matching lines @@
     const MatchedProperties* properties,
     unsigned size) {
   return StringHasher::hashMemory(properties, sizeof(MatchedProperties) * size);
 }
 
 void StyleResolver::invalidateMatchedPropertiesCache() {
   m_matchedPropertiesCache.clear();
 }
 
 void StyleResolver::notifyResizeForViewportUnits() {
+  document().styleEngine().updateActiveStyle();
   m_matchedPropertiesCache.clearViewportDependent();
 }
 
 void StyleResolver::applyMatchedProperties(StyleResolverState& state,
                                            const MatchResult& matchResult) {
   const Element* element = state.element();
   DCHECK(element);
 
   INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(), matchedPropertyApply,
                                 1);
@@ skipping 239 matching lines @@
   if (FrameView* view = document().view()) {
     m_printMediaType =
         equalIgnoringCase(view->mediaType(), MediaTypeNames::print);
   }
 }
 
 DEFINE_TRACE(StyleResolver) {
   visitor->trace(m_matchedPropertiesCache);
   visitor->trace(m_selectorFilter);
   visitor->trace(m_styleSharingLists);
-  visitor->trace(m_pendingStyleSheets);
   visitor->trace(m_document);
   visitor->trace(m_tracker);
 }
 
 }  // namespace blink