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      1 /*
      2  * Copyright (C) 2008, 2009 Apple 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/loader/appcache/ApplicationCache.h"
     28 
     29 #include "bindings/core/v8/ExceptionState.h"
     30 #include "core/dom/Document.h"
     31 #include "core/dom/ExceptionCode.h"
     32 #include "core/events/EventListener.h"
     33 #include "core/frame/LocalFrame.h"
     34 #include "core/loader/DocumentLoader.h"
     35 #include "core/loader/FrameLoader.h"
     36 
     37 namespace blink {
     38 
     39 ApplicationCache::ApplicationCache(LocalFrame* frame)
     40     : DOMWindowProperty(frame)
     41 {
     42     ApplicationCacheHost* cacheHost = applicationCacheHost();
     43     if (cacheHost)
     44         cacheHost->setApplicationCache(this);
     45 }
     46 
     47 void ApplicationCache::trace(Visitor* visitor)
     48 {
     49     EventTargetWithInlineData::trace(visitor);
     50     DOMWindowProperty::trace(visitor);
     51 }
     52 
     53 void ApplicationCache::willDestroyGlobalObjectInFrame()
     54 {
     55     if (ApplicationCacheHost* cacheHost = applicationCacheHost())
     56         cacheHost->setApplicationCache(0);
     57     DOMWindowProperty::willDestroyGlobalObjectInFrame();
     58 }
     59 
     60 ApplicationCacheHost* ApplicationCache::applicationCacheHost() const
     61 {
     62     if (!m_frame || !m_frame->loader().documentLoader())
     63         return 0;
     64     return m_frame->loader().documentLoader()->applicationCacheHost();
     65 }
     66 
     67 unsigned short ApplicationCache::status() const
     68 {
     69     ApplicationCacheHost* cacheHost = applicationCacheHost();
     70     if (!cacheHost)
     71         return ApplicationCacheHost::UNCACHED;
     72     return cacheHost->status();
     73 }
     74 
     75 void ApplicationCache::update(ExceptionState& exceptionState)
     76 {
     77     ApplicationCacheHost* cacheHost = applicationCacheHost();
     78     if (!cacheHost || !cacheHost->update())
     79         exceptionState.throwDOMException(InvalidStateError, "there is no application cache to update.");
     80 }
     81 
     82 void ApplicationCache::swapCache(ExceptionState& exceptionState)
     83 {
     84     ApplicationCacheHost* cacheHost = applicationCacheHost();
     85     if (!cacheHost || !cacheHost->swapCache())
     86         exceptionState.throwDOMException(InvalidStateError, "there is no newer application cache to swap to.");
     87 }
     88 
     89 void ApplicationCache::abort()
     90 {
     91     ApplicationCacheHost* cacheHost = applicationCacheHost();
     92     if (cacheHost)
     93         cacheHost->abort();
     94 }
     95 
     96 const AtomicString& ApplicationCache::interfaceName() const
     97 {
     98     return EventTargetNames::ApplicationCache;
     99 }
    100 
    101 ExecutionContext* ApplicationCache::executionContext() const
    102 {
    103     if (m_frame)
    104         return m_frame->document();
    105     return 0;
    106 }
    107 
    108 const AtomicString& ApplicationCache::toEventType(ApplicationCacheHost::EventID id)
    109 {
    110     switch (id) {
    111     case ApplicationCacheHost::CHECKING_EVENT:
    112         return EventTypeNames::checking;
    113     case ApplicationCacheHost::ERROR_EVENT:
    114         return EventTypeNames::error;
    115     case ApplicationCacheHost::NOUPDATE_EVENT:
    116         return EventTypeNames::noupdate;
    117     case ApplicationCacheHost::DOWNLOADING_EVENT:
    118         return EventTypeNames::downloading;
    119     case ApplicationCacheHost::PROGRESS_EVENT:
    120         return EventTypeNames::progress;
    121     case ApplicationCacheHost::UPDATEREADY_EVENT:
    122         return EventTypeNames::updateready;
    123     case ApplicationCacheHost::CACHED_EVENT:
    124         return EventTypeNames::cached;
    125     case ApplicationCacheHost::OBSOLETE_EVENT:
    126         return EventTypeNames::obsolete;
    127     }
    128     ASSERT_NOT_REACHED();
    129     return EventTypeNames::error;
    130 }
    131 
    132 } // namespace blink
    133