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| 1 /* | |
| 2 * Copyright (C) 2010 Julien Chaffraix <jchaffraix@webkit.org> All right reserv
ed. | |
| 3 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies) | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 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 * | |
| 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 25 */ | |
| 26 | |
| 27 #include "config.h" | |
| 28 #include "core/xml/XMLHttpRequestProgressEventThrottle.h" | |
| 29 | |
| 30 #include "core/events/EventTarget.h" | |
| 31 #include "core/xml/XMLHttpRequestProgressEvent.h" | |
| 32 | |
| 33 namespace blink { | |
| 34 | |
| 35 class XMLHttpRequestProgressEventThrottle::DeferredEvent { | |
| 36 public: | |
| 37 DeferredEvent() { clear(); } | |
| 38 void set(bool lengthComputable, unsigned long long loaded, unsigned long lon
g total) | |
| 39 { | |
| 40 m_isDeferred = true; | |
| 41 m_lengthComputable = lengthComputable; | |
| 42 m_loaded = loaded; | |
| 43 m_total = total; | |
| 44 } | |
| 45 void clear() | |
| 46 { | |
| 47 m_isDeferred = false; | |
| 48 m_lengthComputable = false; | |
| 49 m_loaded = 0; | |
| 50 m_total = 0; | |
| 51 } | |
| 52 bool isDeferred() const { return m_isDeferred; } | |
| 53 bool lengthComputable() const { return m_lengthComputable; } | |
| 54 unsigned long long loaded() const { return m_loaded; } | |
| 55 unsigned long long total() const { return m_total; } | |
| 56 | |
| 57 private: | |
| 58 unsigned long long m_loaded; | |
| 59 unsigned long long m_total; | |
| 60 bool m_isDeferred; | |
| 61 bool m_lengthComputable; | |
| 62 }; | |
| 63 | |
| 64 const double XMLHttpRequestProgressEventThrottle::minimumProgressEventDispatchin
gIntervalInSeconds = .05; // 50 ms per specification. | |
| 65 | |
| 66 XMLHttpRequestProgressEventThrottle::XMLHttpRequestProgressEventThrottle(EventTa
rget* target) | |
| 67 : m_target(target) | |
| 68 , m_deferred(adoptPtr(new DeferredEvent)) | |
| 69 { | |
| 70 ASSERT(target); | |
| 71 } | |
| 72 | |
| 73 XMLHttpRequestProgressEventThrottle::~XMLHttpRequestProgressEventThrottle() | |
| 74 { | |
| 75 } | |
| 76 | |
| 77 void XMLHttpRequestProgressEventThrottle::dispatchProgressEvent(const AtomicStri
ng& type, bool lengthComputable, unsigned long long loaded, unsigned long long t
otal) | |
| 78 { | |
| 79 // Given that ResourceDispatcher doesn't deliver an event when suspended, | |
| 80 // we don't have to worry about event dispatching while suspended. | |
| 81 if (type != EventTypeNames::progress) { | |
| 82 m_target->dispatchEvent(XMLHttpRequestProgressEvent::create(type, length
Computable, loaded, total)); | |
| 83 return; | |
| 84 } | |
| 85 | |
| 86 if (isActive()) { | |
| 87 m_deferred->set(lengthComputable, loaded, total); | |
| 88 } else { | |
| 89 m_target->dispatchEvent(XMLHttpRequestProgressEvent::create(type, length
Computable, loaded, total)); | |
| 90 startOneShot(minimumProgressEventDispatchingIntervalInSeconds, FROM_HERE
); | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 void XMLHttpRequestProgressEventThrottle::dispatchReadyStateChangeEvent(PassRefP
trWillBeRawPtr<Event> event, DeferredEventAction action) | |
| 95 { | |
| 96 // Given that ResourceDispatcher doesn't deliver an event when suspended, | |
| 97 // we don't have to worry about event dispatching while suspended. | |
| 98 if (action == Flush) { | |
| 99 dispatchDeferredEvent(); | |
| 100 stop(); | |
| 101 } else if (action == Clear) { | |
| 102 m_deferred->clear(); | |
| 103 stop(); | |
| 104 } | |
| 105 | |
| 106 m_target->dispatchEvent(event); | |
| 107 } | |
| 108 | |
| 109 void XMLHttpRequestProgressEventThrottle::dispatchDeferredEvent() | |
| 110 { | |
| 111 if (m_deferred->isDeferred()) { | |
| 112 m_target->dispatchEvent(XMLHttpRequestProgressEvent::create(EventTypeNam
es::progress, m_deferred->lengthComputable(), m_deferred->loaded(), m_deferred->
total())); | |
| 113 m_deferred->clear(); | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 void XMLHttpRequestProgressEventThrottle::fired() | |
| 118 { | |
| 119 if (!m_deferred->isDeferred()) { | |
| 120 // No "progress" event was queued since the previous dispatch, we can | |
| 121 // safely stop the timer. | |
| 122 return; | |
| 123 } | |
| 124 | |
| 125 dispatchDeferredEvent(); | |
| 126 | |
| 127 // Watch if another "progress" ProgressEvent arrives in the next 50ms. | |
| 128 startOneShot(minimumProgressEventDispatchingIntervalInSeconds, FROM_HERE); | |
| 129 } | |
| 130 | |
| 131 void XMLHttpRequestProgressEventThrottle::suspend() | |
| 132 { | |
| 133 stop(); | |
| 134 } | |
| 135 | |
| 136 void XMLHttpRequestProgressEventThrottle::resume() | |
| 137 { | |
| 138 if (!m_deferred->isDeferred()) | |
| 139 return; | |
| 140 | |
| 141 // Do not dispatch events inline here, since ExecutionContext is iterating | |
| 142 // over the list of active DOM objects to resume them, and any activated JS | |
| 143 // event-handler could insert new active DOM objects to the list. | |
| 144 startOneShot(0, FROM_HERE); | |
| 145 } | |
| 146 | |
| 147 void XMLHttpRequestProgressEventThrottle::trace(Visitor* visitor) | |
| 148 { | |
| 149 visitor->trace(m_target); | |
| 150 } | |
| 151 | |
| 152 } // namespace blink | |
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Chromium Code Reviews
Issue 666153003:
Move XMLHttpRequest related files to core/xmlhttprequest. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master