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 #include "config.h"

    30 #include "FrameLoaderStateMachine.h"

    31 

    32 #include <wtf/Assertions.h>

    33 

    34 namespace WebCore {

    35 

    36     

    37 FrameLoaderStateMachine::FrameLoaderStateMachine() 

    38     : m_state(Uninitialized)

    39 { 

    40 }

    41     

    42 bool FrameLoaderStateMachine::committingFirstRealLoad() const 

    43 {

    44     return m_state == DisplayingInitialEmptyDocument;

    45 }

    46 

    47 bool FrameLoaderStateMachine::committedFirstRealDocumentLoad() const 

    48 {

    49     return m_state >= DisplayingInitialEmptyDocumentPostCommit;

    50 }

    51 

    52 bool FrameLoaderStateMachine::creatingInitialEmptyDocument() const 

    53 {

    54     return m_state == CreatingInitialEmptyDocument;

    55 }

    56 

    57 bool FrameLoaderStateMachine::isDisplayingInitialEmptyDocument() const 

    58 {

    59     return m_state == DisplayingInitialEmptyDocument || m_state == DisplayingInitialEmptyDocumentPostCommit;

    60 }

    61 

    62 bool FrameLoaderStateMachine::firstLayoutDone() const

    63 {

    64     return m_state == FirstLayoutDone;

    65 }

    66 

    67 void FrameLoaderStateMachine::advanceTo(State state)

    68 {

    69     ASSERT(State(m_state + 1) == state || (firstLayoutDone() && state == CommittedFirstRealLoad));

    70     m_state = state;

    71 }

    72 

    73 } // namespace WebCore