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
44 namespace WebCore {
45
ScheduledAction(v8::Handle<v8::Context> context,v8::Handle<v8::Function> func,int argc,v8::Handle<v8::Value> argv[])46 ScheduledAction::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
~ScheduledAction()70 ScheduledAction::~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
execute(ScriptExecutionContext * context)91 void 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
execute(V8Proxy * proxy)104 void 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)
execute(WorkerContext * workerContext)128 void 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