1/*
2 * Copyright (C) 2010 Google, Inc. All Rights Reserved.
3 * Copyright (C) 2011-2017 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include "PendingScriptClient.h"
30#include "Timer.h"
31#include <wtf/HashSet.h>
32#include <wtf/Vector.h>
33
34namespace WebCore {
35
36class Document;
37class ScriptElement;
38class LoadableScript;
39
40class ScriptRunner : private PendingScriptClient {
41 WTF_MAKE_NONCOPYABLE(ScriptRunner); WTF_MAKE_FAST_ALLOCATED;
42public:
43 explicit ScriptRunner(Document&);
44 ~ScriptRunner();
45
46 enum ExecutionType { ASYNC_EXECUTION, IN_ORDER_EXECUTION };
47 void queueScriptForExecution(ScriptElement&, LoadableScript&, ExecutionType);
48 bool hasPendingScripts() const { return !m_scriptsToExecuteSoon.isEmpty() || !m_scriptsToExecuteInOrder.isEmpty() || !m_pendingAsyncScripts.isEmpty(); }
49 void suspend();
50 void resume();
51 void notifyScriptReady(ScriptElement*, ExecutionType);
52
53 void didBeginYieldingParser() { suspend(); }
54 void didEndYieldingParser() { resume(); }
55
56 void documentFinishedParsing();
57
58private:
59 void timerFired();
60
61 void notifyFinished(PendingScript&) override;
62
63 Document& m_document;
64 Vector<Ref<PendingScript>> m_scriptsToExecuteInOrder;
65 Vector<RefPtr<PendingScript>> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
66 HashSet<Ref<PendingScript>> m_pendingAsyncScripts;
67 Timer m_timer;
68};
69
70}
71