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      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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/dom/DocumentParser.h"
     28 
     29 #include "core/dom/Document.h"
     30 #include "core/dom/DocumentParserClient.h"
     31 #include "core/html/parser/TextResourceDecoder.h"
     32 #include "wtf/Assertions.h"
     33 
     34 namespace blink {
     35 
     36 DocumentParser::DocumentParser(Document* document)
     37     : m_state(ParsingState)
     38     , m_documentWasLoadedAsPartOfNavigation(false)
     39     , m_document(document)
     40 {
     41     ASSERT(document);
     42 }
     43 
     44 DocumentParser::~DocumentParser()
     45 {
     46 #if !ENABLE(OILPAN)
     47     // Document is expected to call detach() before releasing its ref.
     48     // This ASSERT is slightly awkward for parsers with a fragment case
     49     // as there is no Document to release the ref.
     50     ASSERT(!m_document);
     51 #endif
     52 }
     53 
     54 void DocumentParser::trace(Visitor* visitor)
     55 {
     56     visitor->trace(m_document);
     57 #if ENABLE(OILPAN)
     58     visitor->trace(m_clients);
     59 #endif
     60 }
     61 
     62 void DocumentParser::setDecoder(PassOwnPtr<TextResourceDecoder>)
     63 {
     64     ASSERT_NOT_REACHED();
     65 }
     66 
     67 TextResourceDecoder* DocumentParser::decoder()
     68 {
     69     return 0;
     70 }
     71 
     72 void DocumentParser::prepareToStopParsing()
     73 {
     74     ASSERT(m_state == ParsingState);
     75     m_state = StoppingState;
     76 }
     77 
     78 void DocumentParser::stopParsing()
     79 {
     80     m_state = StoppedState;
     81 
     82     // Clients may be removed while in the loop. Make a snapshot for iteration.
     83     WillBeHeapVector<RawPtrWillBeMember<DocumentParserClient> > clientsSnapshot;
     84     copyToVector(m_clients, clientsSnapshot);
     85 
     86     for (WillBeHeapVector<RawPtrWillBeMember<DocumentParserClient> >::const_iterator it = clientsSnapshot.begin(), itEnd = clientsSnapshot.end(); it != itEnd; ++it) {
     87         DocumentParserClient* client = *it;
     88         if (!m_clients.contains(client))
     89             continue;
     90 
     91         client->notifyParserStopped();
     92     }
     93 }
     94 
     95 void DocumentParser::detach()
     96 {
     97     m_state = DetachedState;
     98     m_document = nullptr;
     99 }
    100 
    101 void DocumentParser::suspendScheduledTasks()
    102 {
    103 }
    104 
    105 void DocumentParser::resumeScheduledTasks()
    106 {
    107 }
    108 
    109 void DocumentParser::addClient(DocumentParserClient* client)
    110 {
    111     m_clients.add(client);
    112 }
    113 
    114 void DocumentParser::removeClient(DocumentParserClient* client)
    115 {
    116     m_clients.remove(client);
    117 }
    118 
    119 };
    120 
    121