1 files changed, 229 insertions, 0 deletions
diff --git a/WebCore/css/CSSStyleSheet.cpp b/WebCore/css/CSSStyleSheet.cpp
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+/*
+ * (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2004, 2006, 2007 Apple 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 "CSSStyleSheet.h"
+
+#include "CSSImportRule.h"
+#include "CSSNamespace.h"
+#include "CSSParser.h"
+#include "CSSRuleList.h"
+#include "Document.h"
+#include "ExceptionCode.h"
+#include "Node.h"
+
+#ifdef ANDROID_INSTRUMENT
+#include "TimeCounter.h"
+#endif
+
+namespace WebCore {
+
+CSSStyleSheet::CSSStyleSheet(CSSStyleSheet* parentSheet, const String& href, const String& charset)
+    : StyleSheet(parentSheet, href)
+    , m_doc(parentSheet ? parentSheet->doc() : 0)
+    , m_namespaces(0)
+    , m_charset(charset)
+    , m_loadCompleted(false)
+{
+}
+
+CSSStyleSheet::CSSStyleSheet(Node *parentNode, const String& href, const String& charset)
+    : StyleSheet(parentNode, href)
+    , m_doc(parentNode->document())
+    , m_namespaces(0)
+    , m_charset(charset)
+    , m_loadCompleted(false)
+{
+}
+
+CSSStyleSheet::CSSStyleSheet(CSSRule *ownerRule, const String& href, const String& charset)
+    : StyleSheet(ownerRule, href)
+    , m_namespaces(0)
+    , m_charset(charset)
+    , m_loadCompleted(false)
+{
+    CSSStyleSheet* parentSheet = ownerRule ? ownerRule->parentStyleSheet() : 0;
+    m_doc = parentSheet ? parentSheet->doc() : 0;
+}
+
+CSSStyleSheet::~CSSStyleSheet()
+{
+    delete m_namespaces;
+}
+
+CSSRule *CSSStyleSheet::ownerRule() const
+{
+    return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;
+}
+
+unsigned CSSStyleSheet::insertRule(const String& rule, unsigned index, ExceptionCode& ec)
+{
+    ec = 0;
+    if (index > length()) {
+        ec = INDEX_SIZE_ERR;
+        return 0;
+    }
+    CSSParser p(useStrictParsing());
+    RefPtr<CSSRule> r = p.parseRule(this, rule);
+
+    if (!r) {
+        ec = SYNTAX_ERR;
+        return 0;
+    }
+
+    // ###
+    // HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the specified index e.g. if an
+    //@import rule is inserted after a standard rule set or other at-rule.
+    insert(index, r.release());
+    
+    styleSheetChanged();
+    
+    return index;
+}
+
+int CSSStyleSheet::addRule(const String& selector, const String& style, int index, ExceptionCode& ec)
+{
+    insertRule(selector + " { " + style + " }", index, ec);
+
+    // As per Microsoft documentation, always return -1.
+    return -1;
+}
+
+int CSSStyleSheet::addRule(const String& selector, const String& style, ExceptionCode& ec)
+{
+    return addRule(selector, style, length(), ec);
+}
+
+
+PassRefPtr<CSSRuleList> CSSStyleSheet::cssRules(bool omitCharsetRules)
+{
+    return CSSRuleList::create(this, omitCharsetRules);
+}
+
+void CSSStyleSheet::deleteRule(unsigned index, ExceptionCode& ec)
+{
+    if (index >= length()) {
+        ec = INDEX_SIZE_ERR;
+        return;
+    }
+
+    ec = 0;
+    remove(index);
+    styleSheetChanged();
+}
+
+void CSSStyleSheet::addNamespace(CSSParser* p, const AtomicString& prefix, const AtomicString& uri)
+{
+    if (uri.isEmpty())
+        return;
+
+    m_namespaces = new CSSNamespace(prefix, uri, m_namespaces);
+    
+    if (prefix.isEmpty())
+        // Set the default namespace on the parser so that selectors that omit namespace info will
+        // be able to pick it up easily.
+        p->m_defaultNamespace = uri;
+}
+
+const AtomicString& CSSStyleSheet::determineNamespace(const AtomicString& prefix)
+{
+    if (prefix.isEmpty())
+        return nullAtom; // No namespace. If an element/attribute has a namespace, we won't match it.
+    else if (prefix == starAtom)
+        return starAtom; // We'll match any namespace.
+    else if (m_namespaces) {
+        CSSNamespace* ns = m_namespaces->namespaceForPrefix(prefix);
+        if (ns)
+            return ns->uri();
+    }
+    return nullAtom; // Assume we wont match any namespaces.
+}
+
+bool CSSStyleSheet::parseString(const String &string, bool strict)
+{
+#ifdef ANDROID_INSTRUMENT
+    android::TimeCounter::start(android::TimeCounter::CSSTimeCounter);
+#endif    
+    setStrictParsing(strict);
+    CSSParser p(strict);
+    p.parseSheet(this, string);
+#ifdef ANDROID_INSTRUMENT
+    android::TimeCounter::record(android::TimeCounter::CSSTimeCounter, __FUNCTION__);
+#endif    
+    return true;
+}
+
+bool CSSStyleSheet::isLoading()
+{
+    unsigned len = length();
+    for (unsigned i = 0; i < len; ++i) {
+        StyleBase* rule = item(i);
+        if (rule->isImportRule() && static_cast<CSSImportRule*>(rule)->isLoading())
+            return true;
+    }
+    return false;
+}
+
+void CSSStyleSheet::checkLoaded()
+{
+    if (isLoading())
+        return;
+    if (parent())
+        parent()->checkLoaded();
+    m_loadCompleted = ownerNode() ? ownerNode()->sheetLoaded() : true;
+}
+
+void CSSStyleSheet::styleSheetChanged()
+{
+    StyleBase* root = this;
+    while (StyleBase* parent = root->parent())
+        root = parent;
+    Document* documentToUpdate = (root && root->isCSSStyleSheet()) ? static_cast<CSSStyleSheet*>(root)->doc() : 0;
+    
+    /* FIXME: We don't need to do everything updateStyleSelector does,
+     * basically we just need to recreate the document's selector with the
+     * already existing style sheets.
+     */
+    if (documentToUpdate)
+        documentToUpdate->updateStyleSelector();
+}
+
+void CSSStyleSheet::addSubresourceURLStrings(HashSet<String>& urls, const String& base) const
+{        
+    RefPtr<CSSRuleList> ruleList = const_cast<CSSStyleSheet*>(this)->cssRules();
+    
+    // Add the URLs for each child import rule, and recurse for the stylesheet belonging to each of those rules.
+    for (unsigned i = 0; i < ruleList->length(); ++i) {
+        CSSRule* rule = ruleList->item(i);
+        if (rule->type() != CSSRule::IMPORT_RULE)
+            continue;
+
+        CSSImportRule* importRule = static_cast<CSSImportRule*>(rule);
+        CSSStyleSheet* ruleSheet = importRule->styleSheet();
+        if (!ruleSheet)
+            continue;
+
+        KURL fullURL(KURL(base), importRule->href());
+        urls.add(fullURL.string());
+        ruleSheet->addSubresourceURLStrings(urls, fullURL.string());
+    }
+}
+
+}