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 | |
33 | namespace 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. |
37 | class FrameLoaderStateMachine { |
38 | WTF_MAKE_NONCOPYABLE(FrameLoaderStateMachine); |
39 | public: |
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 | |
60 | private: |
61 | State m_state; |
62 | }; |
63 | |
64 | } // namespace WebCore |
65 | |