| /* |
| * 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 "JSMainThreadExecState.h" |
| #include "JSNode.h" |
| #include "JSNodeFilter.h" |
| #include "NodeFilter.h" |
| #include <runtime/Error.h> |
| #include <runtime/JSLock.h> |
| |
| namespace WebCore { |
| |
| using namespace JSC; |
| |
| JSNodeFilterCondition::JSNodeFilterCondition(JSGlobalData&, NodeFilter* owner, JSValue filter) |
| : m_filter(filter.isObject() ? PassWeak<JSObject>(jsCast<JSObject*>(filter), &m_weakOwner, owner) : nullptr) |
| { |
| } |
| |
| short JSNodeFilterCondition::acceptNode(JSC::ExecState* exec, Node* filterNode) const |
| { |
| JSLockHolder lock(exec); |
| |
| if (!m_filter) |
| return NodeFilter::FILTER_ACCEPT; |
| |
| // Exec is null if we've been called from a non-JavaScript language and the document |
| // is no longer able to run JavaScript (e.g., it's disconnected from its frame). |
| if (!exec) |
| return NodeFilter::FILTER_REJECT; |
| |
| JSValue filter = m_filter.get(); |
| CallData callData; |
| CallType callType = getCallData(filter, callData); |
| if (callType == CallTypeNone) { |
| filter = filter.get(exec, Identifier(exec, "acceptNode")); |
| callType = getCallData(filter, 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 = JSMainThreadExecState::call(exec, filter, callType, callData, m_filter.get(), args); |
| if (exec->hadException()) |
| return NodeFilter::FILTER_REJECT; |
| |
| int intResult = result.toInt32(exec); |
| if (exec->hadException()) |
| return NodeFilter::FILTER_REJECT; |
| |
| return intResult; |
| } |
| |
| bool JSNodeFilterCondition::WeakOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown>, void* context, SlotVisitor& visitor) |
| { |
| return visitor.containsOpaqueRoot(context); |
| } |
| |
| } // namespace WebCore |