1 /*
2 * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "V8NodeFilterCondition.h"
33
34 #include "Node.h"
35 #include "NodeFilter.h"
36 #include "ScriptState.h"
37 #include "V8Node.h"
38 #include "V8Proxy.h"
39
40 #include <wtf/OwnArrayPtr.h>
41
42 namespace WebCore {
43
V8NodeFilterCondition(v8::Handle<v8::Value> filter)44 V8NodeFilterCondition::V8NodeFilterCondition(v8::Handle<v8::Value> filter)
45 : m_filter(v8::Persistent<v8::Value>::New(filter))
46 {
47 #ifndef NDEBUG
48 V8GCController::registerGlobalHandle(NODE_FILTER, this, m_filter);
49 #endif
50 }
51
~V8NodeFilterCondition()52 V8NodeFilterCondition::~V8NodeFilterCondition()
53 {
54 #ifndef NDEBUG
55 V8GCController::unregisterGlobalHandle(this, m_filter);
56 #endif
57 m_filter.Dispose();
58 m_filter.Clear();
59 }
60
acceptNode(ScriptState * state,Node * node) const61 short V8NodeFilterCondition::acceptNode(ScriptState* state, Node* node) const
62 {
63 ASSERT(v8::Context::InContext());
64
65 if (!m_filter->IsFunction())
66 return NodeFilter::FILTER_ACCEPT;
67
68 v8::TryCatch exceptionCatcher;
69
70 v8::Handle<v8::Object> object = v8::Context::GetCurrent()->Global();
71 v8::Handle<v8::Function> callback = v8::Handle<v8::Function>::Cast(m_filter);
72 OwnArrayPtr<v8::Handle<v8::Value> > args(new v8::Handle<v8::Value>[1]);
73 args[0] = toV8(node);
74
75 V8Proxy* proxy = V8Proxy::retrieve();
76 ASSERT(proxy);
77
78 v8::Handle<v8::Value> result = proxy->callFunction(callback, object, 1, args.get());
79
80 if (exceptionCatcher.HasCaught()) {
81 state->setException(exceptionCatcher.Exception());
82 return NodeFilter::FILTER_REJECT;
83 }
84
85 ASSERT(!result.IsEmpty());
86
87 return result->Int32Value();
88 }
89
90 } // namespace WebCore
91