--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/css/CSSStyleSheet.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,271 @@
+/*
+ * (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"
+#include "SecurityOrigin.h"
+#include "TextEncoding.h"
+#include <wtf/Deque.h>
+
+namespace WebCore {
+
+CSSStyleSheet::CSSStyleSheet(CSSStyleSheet* parentSheet, const String& href, const KURL& baseURL, const String& charset)
+ : StyleSheet(parentSheet, href, baseURL)
+ , m_doc(parentSheet ? parentSheet->doc() : 0)
+ , m_namespaces(0)
+ , m_charset(charset)
+ , m_loadCompleted(false)
+ , m_strictParsing(!parentSheet || parentSheet->useStrictParsing())
+ , m_isUserStyleSheet(parentSheet ? parentSheet->isUserStyleSheet() : false)
+ , m_hasSyntacticallyValidCSSHeader(true)
+{
+}
+
+CSSStyleSheet::CSSStyleSheet(Node* parentNode, const String& href, const KURL& baseURL, const String& charset)
+ : StyleSheet(parentNode, href, baseURL)
+ , m_doc(parentNode->document())
+ , m_namespaces(0)
+ , m_charset(charset)
+ , m_loadCompleted(false)
+ , m_strictParsing(false)
+ , m_isUserStyleSheet(false)
+ , m_hasSyntacticallyValidCSSHeader(true)
+{
+}
+
+CSSStyleSheet::CSSStyleSheet(CSSRule* ownerRule, const String& href, const KURL& baseURL, const String& charset)
+ : StyleSheet(ownerRule, href, baseURL)
+ , m_namespaces(0)
+ , m_charset(charset)
+ , m_loadCompleted(false)
+ , m_strictParsing(!ownerRule || ownerRule->useStrictParsing())
+ , m_hasSyntacticallyValidCSSHeader(true)
+{
+ CSSStyleSheet* parentSheet = ownerRule ? ownerRule->parentStyleSheet() : 0;
+ m_doc = parentSheet ? parentSheet->doc() : 0;
+ m_isUserStyleSheet = parentSheet ? parentSheet->isUserStyleSheet() : false;
+}
+
+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;
+ }
+
+ // Throw a HIERARCHY_REQUEST_ERR exception if the rule cannot be inserted at the specified index. The best
+ // example of this is an @import rule inserted after regular rules.
+ if (index > 0) {
+ if (r->isImportRule()) {
+ // Check all the rules that come before this one to make sure they are only @charset and @import rules.
+ for (unsigned i = 0; i < index; ++i) {
+ if (!item(i)->isCharsetRule() && !item(i)->isImportRule()) {
+ ec = HIERARCHY_REQUEST_ERR;
+ return 0;
+ }
+ }
+ } else if (r->isCharsetRule()) {
+ // The @charset rule has to come first and there can be only one.
+ ec = HIERARCHY_REQUEST_ERR;
+ return 0;
+ }
+ }
+
+ 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)
+{
+ KURL url = finalURL();
+ if (!url.isEmpty() && doc() && !doc()->securityOrigin()->canRequest(url))
+ return 0;
+ 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.isNull())
+ 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.isNull())
+ return nullAtom; // No namespace. If an element/attribute has a namespace, we won't match it.
+ if (prefix == starAtom)
+ return starAtom; // We'll match any namespace.
+ 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)
+{
+ return parseStringAtLine(string, strict, 0);
+}
+
+bool CSSStyleSheet::parseStringAtLine(const String& string, bool strict, int startLineNumber)
+{
+ setStrictParsing(strict);
+ CSSParser p(strict);
+ p.parseSheet(this, string, startLineNumber);
+ 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();
+
+ // Avoid |this| being deleted by scripts that run via
+ // ScriptableDocumentParser::executeScriptsWaitingForStylesheets().
+ // See <rdar://problem/6622300>.
+ RefPtr<CSSStyleSheet> protector(this);
+ m_loadCompleted = ownerNode() ? ownerNode()->sheetLoaded() : true;
+}
+
+void CSSStyleSheet::styleSheetChanged()
+{
+ StyleBase* root = this;
+ while (StyleBase* parent = root->parent())
+ root = parent;
+ Document* documentToUpdate = 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();
+}
+
+KURL CSSStyleSheet::completeURL(const String& url) const
+{
+ // Always return a null URL when passed a null string.
+ // FIXME: Should we change the KURL constructor to have this behavior?
+ // See also Document::completeURL(const String&)
+ if (url.isNull() || m_charset.isEmpty())
+ return StyleSheet::completeURL(url);
+ const TextEncoding encoding = TextEncoding(m_charset);
+ return KURL(baseURL(), url, encoding);
+}
+
+void CSSStyleSheet::addSubresourceStyleURLs(ListHashSet<KURL>& urls)
+{
+ Deque<CSSStyleSheet*> styleSheetQueue;
+ styleSheetQueue.append(this);
+
+ while (!styleSheetQueue.isEmpty()) {
+ CSSStyleSheet* styleSheet = styleSheetQueue.takeFirst();
+
+ for (unsigned i = 0; i < styleSheet->length(); ++i) {
+ StyleBase* styleBase = styleSheet->item(i);
+ if (!styleBase->isRule())
+ continue;
+
+ CSSRule* rule = static_cast<CSSRule*>(styleBase);
+ if (rule->isImportRule()) {
+ if (CSSStyleSheet* ruleStyleSheet = static_cast<CSSImportRule*>(rule)->styleSheet())
+ styleSheetQueue.append(ruleStyleSheet);
+ }
+ rule->addSubresourceStyleURLs(urls);
+ }
+ }
+}
+
+}