1/* 2 * Copyright (C) 2001 Peter Kelly (pmk@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 "JSMainThreadExecState.h" 24#include "JSNode.h" 25#include "JSNodeFilter.h" 26#include "NodeFilter.h" 27#include <runtime/Error.h> 28#include <runtime/JSLock.h> 29 30namespace WebCore { 31 32using namespace JSC; 33 34JSNodeFilterCondition::JSNodeFilterCondition(VM&, NodeFilter* owner, JSValue filter) 35 : m_filter(filter.isObject() ? PassWeak<JSObject>(jsCast<JSObject*>(filter), &m_weakOwner, owner) : nullptr) 36{ 37} 38 39short JSNodeFilterCondition::acceptNode(JSC::ExecState* exec, Node* filterNode) const 40{ 41 JSLockHolder lock(exec); 42 43 if (!m_filter) 44 return NodeFilter::FILTER_ACCEPT; 45 46 // Exec is null if we've been called from a non-JavaScript language and the document 47 // is no longer able to run JavaScript (e.g., it's disconnected from its frame). 48 if (!exec) 49 return NodeFilter::FILTER_REJECT; 50 51 JSValue filter = m_filter.get(); 52 CallData callData; 53 CallType callType = getCallData(filter, callData); 54 if (callType == CallTypeNone) { 55 filter = filter.get(exec, Identifier(exec, "acceptNode")); 56 callType = getCallData(filter, callData); 57 if (callType == CallTypeNone) { 58 throwError(exec, createTypeError(exec, "NodeFilter object does not have an acceptNode function")); 59 return NodeFilter::FILTER_REJECT; 60 } 61 } 62 63 MarkedArgumentBuffer args; 64 // FIXME: The node should have the prototype chain that came from its document, not 65 // whatever prototype chain might be on the window this filter came from. Bug 27662 66 args.append(toJS(exec, deprecatedGlobalObjectForPrototype(exec), filterNode)); 67 if (exec->hadException()) 68 return NodeFilter::FILTER_REJECT; 69 70 JSValue result = JSMainThreadExecState::call(exec, filter, callType, callData, m_filter.get(), args); 71 if (exec->hadException()) 72 return NodeFilter::FILTER_REJECT; 73 74 int intResult = result.toInt32(exec); 75 if (exec->hadException()) 76 return NodeFilter::FILTER_REJECT; 77 78 return intResult; 79} 80 81bool JSNodeFilterCondition::WeakOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, SlotVisitor& visitor) 82{ 83 return visitor.containsOpaqueRoot(context); 84} 85 86} // namespace WebCore 87