Move preferred stylesheet logic into StyleEngine.

third_party/WebKit/Source/core/dom/StyleEngine.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 696 matching lines @@
     if (!enabled) {
         m_styleResolverStats = nullptr;
         return;
     }
     if (!m_styleResolverStats)
         m_styleResolverStats = StyleResolverStats::create();
     else
         m_styleResolverStats->reset();
 }
 
+void StyleEngine::setPreferredStylesheetSetNameIfNotSet(const String& name)
+{
+    if (!m_preferredStylesheetSetName.isEmpty())
+        return;
+    m_preferredStylesheetSetName = name;
+    // TODO(rune@opera.com): Setting the selected set here is wrong if the set
+    // has been previously set by through Document.selectedStylesheetSet. Our
+    // current implementation ignores the effect of Document.selectedStylesheetSet
+    // and either only collects persistent style, or additionally preferred
+    // style when present. We are currently not marking the document scope dirty
+    // because preferred style is updated during active stylesheet update which
+    // would make this method re-entrant. Will need to change for async update.
+    m_selectedStylesheetSetName = name;
+}
+
+void StyleEngine::setSelectedStylesheetSetName(const String& name)
+{
+    m_selectedStylesheetSetName = name;
+    // TODO(rune@opera.com): Setting Document.selectedStylesheetSet currently
+    // has no other effect than the ability to read back the set value using
+    // the same api. If it did have an effect, we should have marked the
+    // document scope dirty and triggered an update of the active stylesheets
+    // from here.
+}
+
+void StyleEngine::setHttpDefaultStyle(const String& content)
+{
+    setPreferredStylesheetSetNameIfNotSet(content);
+    markDocumentDirty();
+    resolverChanged(FullStyleUpdate);
+}
+
 DEFINE_TRACE(StyleEngine)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_document);
     visitor->trace(m_injectedAuthorStyleSheets);
     visitor->trace(m_documentStyleSheetCollection);
     visitor->trace(m_styleSheetCollectionMap);
     visitor->trace(m_resolver);
     visitor->trace(m_styleInvalidator);
     visitor->trace(m_dirtyTreeScopes);
     visitor->trace(m_activeTreeScopes);
     visitor->trace(m_fontSelector);
     visitor->trace(m_textToSheetCache);
     visitor->trace(m_sheetToTextCache);
 #endif
     CSSFontSelectorClient::trace(visitor);
 }
 
 } // namespace blink