Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 150 insertions, 0 deletions

diff --git a/Source/WebCore/css/CSSStyleRule.cpp b/Source/WebCore/css/CSSStyleRule.cpp
new file mode 100644
index 000000000..6296e64b7
--- /dev/null
+++ b/Source/WebCore/css/CSSStyleRule.cpp
@@ -0,0 +1,150 @@
+/*
+ * (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2002, 2005, 2006, 2008 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 "CSSStyleRule.h"
+
+#include "CSSMutableStyleDeclaration.h"
+#include "CSSPageRule.h"
+#include "CSSParser.h"
+#include "CSSSelector.h"
+#include "CSSStyleSheet.h"
+#include "Document.h"
+#include "StyledElement.h"
+#include "StyleSheet.h"
+
+#include <wtf/text/StringBuilder.h>
+
+namespace WebCore {
+
+CSSStyleRule::CSSStyleRule(CSSStyleSheet* parent, int line, CSSRule::Type type)
+    : CSSRule(parent, type)
+{
+    setSourceLine(line);
+
+    // m_sourceLine is a bitfield, so let's catch any overflow early in debug mode.
+    ASSERT(sourceLine() == line);
+}
+
+CSSStyleRule::~CSSStyleRule()
+{
+    if (m_style)
+        m_style->clearParentRule();
+    cleanup();
+}
+
+typedef HashMap<const CSSStyleRule*, String> SelectorTextCache;
+static SelectorTextCache& selectorTextCache()
+{
+    DEFINE_STATIC_LOCAL(SelectorTextCache, cache, ());
+    return cache;
+}
+
+inline void CSSStyleRule::cleanup()
+{
+    if (hasCachedSelectorText()) {
+        selectorTextCache().remove(this);
+        setHasCachedSelectorText(false);
+    }
+}
+
+String CSSStyleRule::generateSelectorText() const
+{
+    if (isPageRule())
+        return static_cast<const CSSPageRule*>(this)->pageSelectorText();
+    else {
+        StringBuilder builder;
+        for (CSSSelector* s = selectorList().first(); s; s = CSSSelectorList::next(s)) {
+            if (s != selectorList().first())
+                builder.append(", ");
+            builder.append(s->selectorText());
+        }
+        return builder.toString();
+    }
+}
+
+String CSSStyleRule::selectorText() const
+{
+    if (hasCachedSelectorText()) {
+        ASSERT(selectorTextCache().contains(this));
+        return selectorTextCache().get(this);
+    }
+
+    ASSERT(!selectorTextCache().contains(this));
+    String text = generateSelectorText();
+    selectorTextCache().set(this, text);
+    setHasCachedSelectorText(true);
+    return text;
+}
+
+void CSSStyleRule::setSelectorText(const String& selectorText)
+{
+    Document* doc = 0;
+
+    if (CSSStyleSheet* styleSheet = m_style->parentStyleSheet())
+        doc = styleSheet->findDocument();
+
+    if (!doc && m_style->isElementStyleDeclaration()) {
+        if (StyledElement* element = static_cast<CSSElementStyleDeclaration*>(m_style.get())->element())
+            doc = element->document();
+    }
+
+    if (!doc)
+        return;
+
+    CSSParser p;
+    CSSSelectorList selectorList;
+    p.parseSelector(selectorText, doc, selectorList);
+    if (!selectorList.first())
+        return;
+
+    String oldSelectorText = this->selectorText();
+    m_selectorList.adopt(selectorList);
+
+    if (hasCachedSelectorText()) {
+        ASSERT(selectorTextCache().contains(this));
+        selectorTextCache().set(this, generateSelectorText());
+    }
+
+    if (this->selectorText() == oldSelectorText)
+        return;
+
+    doc->styleSelectorChanged(DeferRecalcStyle);
+}
+
+String CSSStyleRule::cssText() const
+{
+    String result = selectorText();
+
+    result += " { ";
+    result += m_style->cssText();
+    result += "}";
+
+    return result;
+}
+
+void CSSStyleRule::addSubresourceStyleURLs(ListHashSet<KURL>& urls)
+{
+    if (m_style)
+        m_style->addSubresourceStyleURLs(urls);
+}
+
+} // namespace WebCore