1 /* 2 * Copyright (C) 2001 Peter Kelly (pmk (at) post.com) 3 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 #include "config.h" 21 #include "JSNodeFilterCondition.h" 22 23 #include "JSNode.h" 24 #include "JSNodeFilter.h" 25 #include "NodeFilter.h" 26 #include <runtime/JSLock.h> 27 28 namespace WebCore { 29 30 using namespace JSC; 31 32 ASSERT_CLASS_FITS_IN_CELL(JSNodeFilterCondition); 33 34 JSNodeFilterCondition::JSNodeFilterCondition(JSValue filter) 35 : m_filter(filter) 36 { 37 } 38 39 void JSNodeFilterCondition::markAggregate(MarkStack& markStack) 40 { 41 markStack.append(m_filter); 42 } 43 44 short JSNodeFilterCondition::acceptNode(JSC::ExecState* exec, Node* filterNode) const 45 { 46 JSLock lock(SilenceAssertionsOnly); 47 48 CallData callData; 49 CallType callType = m_filter.getCallData(callData); 50 if (callType == CallTypeNone) 51 return NodeFilter::FILTER_ACCEPT; 52 53 // The exec argument here should only be null if this was called from a 54 // non-JavaScript language, and this is a JavaScript filter, and the document 55 // in question is not associated with the frame. In that case, we're going to 56 // behave incorrectly, and just reject nodes instead of calling the filter function. 57 // To fix that we'd need to come up with a way to find a suitable JavaScript 58 // execution context for the filter function to run in. 59 if (!exec) 60 return NodeFilter::FILTER_REJECT; 61 62 MarkedArgumentBuffer args; 63 // FIXME: The node should have the prototype chain that came from its document, not 64 // whatever prototype chain might be on the window this filter came from. Bug 27662 65 args.append(toJS(exec, deprecatedGlobalObjectForPrototype(exec), filterNode)); 66 if (exec->hadException()) 67 return NodeFilter::FILTER_REJECT; 68 69 JSValue result = JSC::call(exec, m_filter, callType, callData, m_filter, args); 70 if (exec->hadException()) 71 return NodeFilter::FILTER_REJECT; 72 73 int intResult = result.toInt32(exec); 74 if (exec->hadException()) 75 return NodeFilter::FILTER_REJECT; 76 77 return intResult; 78 } 79 80 } // namespace WebCore 81
