1/*
2 * Copyright (C) 2010 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
6 * are met:
7 *
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 * 3. Neither the name of Google, Inc. nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#pragma once
30
31#include <wtf/Noncopyable.h>
32
33namespace WebCore {
34
35// Encapsulates a state machine for FrameLoader. Note that this is different from FrameState,
36// which stores the state of the current load that FrameLoader is executing.
37class FrameLoaderStateMachine {
38 WTF_MAKE_NONCOPYABLE(FrameLoaderStateMachine);
39public:
40 FrameLoaderStateMachine();
41
42 // Once a load has been committed, the state may
43 // alternate between CommittedFirstRealLoad and FirstLayoutDone.
44 // Otherwise, the states only go down the list.
45 enum State {
46 CreatingInitialEmptyDocument,
47 DisplayingInitialEmptyDocument,
48 DisplayingInitialEmptyDocumentPostCommit,
49 CommittedFirstRealLoad,
50 FirstLayoutDone
51 };
52
53 WEBCORE_EXPORT bool committingFirstRealLoad() const;
54 bool committedFirstRealDocumentLoad() const;
55 bool creatingInitialEmptyDocument() const;
56 WEBCORE_EXPORT bool isDisplayingInitialEmptyDocument() const;
57 WEBCORE_EXPORT bool firstLayoutDone() const;
58 void advanceTo(State);
59
60private:
61 State m_state;
62};
63
64} // namespace WebCore
65