[import] support document.stylesheets in imported documents.

Source/core/dom/DocumentStyleSheetCollector.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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 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.
  */
 
 #include "config.h"
 #include "core/dom/DocumentStyleSheetCollector.h"
 
+#include "core/css/StyleSheet.h"
 #include "core/dom/Document.h"
 
 namespace WebCore {
 
-bool DocumentStyleSheetCollector::isCollectingForList(TreeScope& scope) const
+DocumentStyleSheetCollector::DocumentStyleSheetCollector(TreeScope& root)
+    : m_root(root)
 {
-    return m_root == scope;
+}
+
+DocumentStyleSheetCollector::~DocumentStyleSheetCollector()
+{
 }
 
 void DocumentStyleSheetCollector::setCollectionTo(StyleSheetCollectionBase& collection)
 {
     m_collection.swap(collection);
 }
 
+void DocumentStyleSheetCollector::appendSheetForList(StyleSheet* sheet)

[esprehn, 2014/01/23 07:51:03]

reference?

[Hajime Morrita, 2014/01/24 01:25:51]

This is aligned to DocumentStyleSheetCollection API

+{
+    Document& ownerDocument = sheet->ownerNode()->document();
+    if (ownerDocument == m_root) {
+        m_collection.appendSheetForList(sheet);
+    } else {
+        ASSERT(m_sheetListMap.contains(&ownerDocument));
+        m_sheetListMap.find(&ownerDocument)->value.append(sheet);
+    }
 }
+
+void DocumentStyleSheetCollector::markVisited(Document* document)
+{
+    m_sheetListMap.add(document, SheetList());
+}
+
+bool DocumentStyleSheetCollector::hasVisited(Document* document) const
+{
+    return m_sheetListMap.contains(document);

[esprehn, 2014/01/23 07:51:03]

This seems like the wrong abstraction, the StyleEngine at the top should just
ask each style engine down the import tree to collect the sheets and keep their
own candidate nodes. No StyleEngine should be looking at other documents.

[Hajime Morrita, 2014/01/24 01:25:51]

Makes sense. Changed the approach.

+}
+
+}