1/*
2 * Copyright (C) 2007-2009 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 "ScheduledAction.h"
33
34#include "Document.h"
35#include "ScriptExecutionContext.h"
36#include "ScriptSourceCode.h"
37
38#include "V8Binding.h"
39#include "V8Proxy.h"
40#include "WorkerContext.h"
41#include "WorkerContextExecutionProxy.h"
42#include "WorkerThread.h"
43
44namespace WebCore {
45
46ScheduledAction::ScheduledAction(v8::Handle<v8::Context> context, v8::Handle<v8::Function> func, int argc, v8::Handle<v8::Value> argv[])
47    : m_context(context)
48    , m_code(String(), KURL(), TextPosition1::belowRangePosition())
49{
50    m_function = v8::Persistent<v8::Function>::New(func);
51
52#ifndef NDEBUG
53    V8GCController::registerGlobalHandle(SCHEDULED_ACTION, this, m_function);
54#endif
55
56    m_argc = argc;
57    if (argc > 0) {
58        m_argv = new v8::Persistent<v8::Value>[argc];
59        for (int i = 0; i < argc; i++) {
60            m_argv[i] = v8::Persistent<v8::Value>::New(argv[i]);
61
62#ifndef NDEBUG
63    V8GCController::registerGlobalHandle(SCHEDULED_ACTION, this, m_argv[i]);
64#endif
65        }
66    } else
67        m_argv = 0;
68}
69
70ScheduledAction::~ScheduledAction()
71{
72    if (m_function.IsEmpty())
73        return;
74
75#ifndef NDEBUG
76    V8GCController::unregisterGlobalHandle(this, m_function);
77#endif
78    m_function.Dispose();
79
80    for (int i = 0; i < m_argc; i++) {
81#ifndef NDEBUG
82        V8GCController::unregisterGlobalHandle(this, m_argv[i]);
83#endif
84        m_argv[i].Dispose();
85    }
86
87    if (m_argc > 0)
88        delete[] m_argv;
89}
90
91void ScheduledAction::execute(ScriptExecutionContext* context)
92{
93    V8Proxy* proxy = V8Proxy::retrieve(context);
94    if (proxy)
95        execute(proxy);
96#if ENABLE(WORKERS)
97    else if (context->isWorkerContext())
98        execute(static_cast<WorkerContext*>(context));
99#endif
100    // It's possible that Javascript is disabled and that we have neither a V8Proxy
101    // nor a WorkerContext.  Do nothing in that case.
102}
103
104void ScheduledAction::execute(V8Proxy* proxy)
105{
106    ASSERT(proxy);
107
108    v8::HandleScope handleScope;
109    v8::Handle<v8::Context> v8Context = v8::Local<v8::Context>::New(m_context.get());
110    if (v8Context.IsEmpty())
111        return; // JS may not be enabled.
112
113    v8::Context::Scope scope(v8Context);
114
115    proxy->setTimerCallback(true);
116
117    // FIXME: Need to implement timeouts for preempting a long-running script.
118    if (!m_function.IsEmpty() && m_function->IsFunction()) {
119        proxy->callFunction(v8::Persistent<v8::Function>::Cast(m_function), v8Context->Global(), m_argc, m_argv);
120        Document::updateStyleForAllDocuments();
121    } else
122        proxy->evaluate(m_code, 0);
123
124    proxy->setTimerCallback(false);
125}
126
127#if ENABLE(WORKERS)
128void ScheduledAction::execute(WorkerContext* workerContext)
129{
130    // In a Worker, the execution should always happen on a worker thread.
131    ASSERT(workerContext->thread()->threadID() == currentThread());
132
133    WorkerScriptController* scriptController = workerContext->script();
134
135    if (!m_function.IsEmpty() && m_function->IsFunction()) {
136        v8::HandleScope handleScope;
137        v8::Handle<v8::Context> v8Context = v8::Local<v8::Context>::New(m_context.get());
138        ASSERT(!v8Context.IsEmpty());
139        v8::Context::Scope scope(v8Context);
140        m_function->Call(v8Context->Global(), m_argc, m_argv);
141    } else
142        scriptController->evaluate(m_code);
143}
144#endif
145
146} // namespace WebCore
147