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/platform/external/webkit/WebCore/bindings/v8/V8NodeFilterCondition.cpp

https://github.com/aharish/totoro-gb-opensource-update2
C++ | 90 lines | 45 code | 16 blank | 29 comment | 2 complexity | 45c57abe28470cdf48d783cf10abe6ca MD5 | raw file
 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
42namespace WebCore {
43
44V8NodeFilterCondition::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
52V8NodeFilterCondition::~V8NodeFilterCondition()
53{
54#ifndef NDEBUG
55    V8GCController::unregisterGlobalHandle(this, m_filter);
56#endif
57    m_filter.Dispose();
58    m_filter.Clear();
59}
60
61short 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