1 files changed, 91 insertions, 0 deletions
diff --git a/Source/WebCore/bindings/js/JSNodeFilterCondition.cpp b/Source/WebCore/bindings/js/JSNodeFilterCondition.cpp
new file mode 100644
index 0000000..b269e5f
--- /dev/null
+++ b/Source/WebCore/bindings/js/JSNodeFilterCondition.cpp
@@ -0,0 +1,91 @@
+/*
+ *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ *  Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "config.h"
+#include "JSNodeFilterCondition.h"
+
+#include "JSNode.h"
+#include "JSNodeFilter.h"
+#include "NodeFilter.h"
+#include <runtime/Error.h>
+#include <runtime/JSLock.h>
+
+namespace WebCore {
+
+using namespace JSC;
+
+ASSERT_CLASS_FITS_IN_CELL(JSNodeFilterCondition);
+
+JSNodeFilterCondition::JSNodeFilterCondition(JSValue filter)
+    : m_filter(filter)
+{
+}
+
+void JSNodeFilterCondition::markAggregate(MarkStack& markStack)
+{
+    markStack.append(m_filter);
+}
+
+short JSNodeFilterCondition::acceptNode(JSC::ExecState* exec, Node* filterNode) const
+{
+    JSLock lock(SilenceAssertionsOnly);
+
+    if (!m_filter.isObject())
+        return NodeFilter::FILTER_ACCEPT;
+
+   // The exec argument here should only be null if this was called from a
+   // non-JavaScript language, and this is a JavaScript filter, and the document
+   // in question is not associated with the frame. In that case, we're going to
+   // behave incorrectly, and just reject nodes instead of calling the filter function.
+   // To fix that we'd need to come up with a way to find a suitable JavaScript
+   // execution context for the filter function to run in.
+    if (!exec)
+        return NodeFilter::FILTER_REJECT;
+
+    JSValue function = m_filter;
+    CallData callData;
+    CallType callType = getCallData(function, callData);
+    if (callType == CallTypeNone) {
+        function = m_filter.get(exec, Identifier(exec, "acceptNode"));
+        callType = getCallData(function, callData);
+        if (callType == CallTypeNone) {
+            throwError(exec, createTypeError(exec, "NodeFilter object does not have an acceptNode function"));
+            return NodeFilter::FILTER_REJECT;
+        }
+    }
+
+    MarkedArgumentBuffer args;
+    // FIXME: The node should have the prototype chain that came from its document, not
+    // whatever prototype chain might be on the window this filter came from. Bug 27662
+    args.append(toJS(exec, deprecatedGlobalObjectForPrototype(exec), filterNode));
+    if (exec->hadException())
+        return NodeFilter::FILTER_REJECT;
+
+    JSValue result = JSC::call(exec, function, callType, callData, m_filter, args);
+    if (exec->hadException())
+        return NodeFilter::FILTER_REJECT;
+
+    int intResult = result.toInt32(exec);
+    if (exec->hadException())
+        return NodeFilter::FILTER_REJECT;
+
+    return intResult;
+}
+
+} // namespace WebCore