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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 "core/xmlhttprequest/ProgressEventThrottle.h" | |
| 28 | |
| 29 #include "core/EventTypeNames.h" | |
| 30 #include "core/events/ProgressEvent.h" | |
| 31 #include "core/inspector/InspectorInstrumentation.h" | |
| 32 #include "core/inspector/InspectorTraceEvents.h" | |
| 33 #include "core/xmlhttprequest/XMLHttpRequest.h" | |
| 34 #include "wtf/Assertions.h" | |
| 35 #include "wtf/text/AtomicString.h" | |
| 36 | |
| 37 namespace blink { | |
| 38 | |
| 39 ProgressEventThrottle::DeferredEvent::DeferredEvent() | |
| 40 { | |
| 41 clear(); | |
| 42 } | |
| 43 | |
| 44 void ProgressEventThrottle::DeferredEvent::set(bool lengthComputable, unsigned l
ong long loaded, unsigned long long total) | |
| 45 { | |
| 46 m_isSet = true; | |
| 47 | |
| 48 m_lengthComputable = lengthComputable; | |
| 49 m_loaded = loaded; | |
| 50 m_total = total; | |
| 51 } | |
| 52 | |
| 53 void ProgressEventThrottle::DeferredEvent::clear() | |
| 54 { | |
| 55 m_isSet = false; | |
| 56 | |
| 57 m_lengthComputable = false; | |
| 58 m_loaded = 0; | |
| 59 m_total = 0; | |
| 60 } | |
| 61 | |
| 62 PassRefPtrWillBeRawPtr<Event> ProgressEventThrottle::DeferredEvent::take() | |
| 63 { | |
| 64 ASSERT(m_isSet); | |
| 65 | |
| 66 RefPtrWillBeRawPtr<Event> event = ProgressEvent::create(EventTypeNames::prog
ress, m_lengthComputable, m_loaded, m_total); | |
| 67 clear(); | |
| 68 return event.release(); | |
| 69 } | |
| 70 | |
| 71 const double ProgressEventThrottle::minimumProgressEventDispatchingIntervalInSec
onds = .05; // 50 ms per specification. | |
| 72 | |
| 73 ProgressEventThrottle::ProgressEventThrottle(XMLHttpRequest* target) | |
| 74 : m_target(target) | |
| 75 , m_hasDispatchedProgressProgressEvent(false) | |
| 76 { | |
| 77 ASSERT(target); | |
| 78 } | |
| 79 | |
| 80 ProgressEventThrottle::~ProgressEventThrottle() | |
| 81 { | |
| 82 } | |
| 83 | |
| 84 void ProgressEventThrottle::dispatchProgressEvent(const AtomicString& type, bool
lengthComputable, unsigned long long loaded, unsigned long long total) | |
| 85 { | |
| 86 // Given that ResourceDispatcher doesn't deliver an event when suspended, | |
| 87 // we don't have to worry about event dispatching while suspended. | |
| 88 if (type != EventTypeNames::progress) { | |
| 89 m_target->dispatchEvent(ProgressEvent::create(type, lengthComputable, lo
aded, total)); | |
| 90 return; | |
| 91 } | |
| 92 | |
| 93 if (isActive()) { | |
| 94 m_deferred.set(lengthComputable, loaded, total); | |
| 95 } else { | |
| 96 dispatchProgressProgressEvent(ProgressEvent::create(EventTypeNames::prog
ress, lengthComputable, loaded, total)); | |
| 97 startOneShot(minimumProgressEventDispatchingIntervalInSeconds, BLINK_FRO
M_HERE); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 void ProgressEventThrottle::dispatchReadyStateChangeEvent(PassRefPtrWillBeRawPtr
<Event> event, DeferredEventAction action) | |
| 102 { | |
| 103 XMLHttpRequest::State state = m_target->readyState(); | |
| 104 // Given that ResourceDispatcher doesn't deliver an event when suspended, | |
| 105 // we don't have to worry about event dispatching while suspended. | |
| 106 if (action == Flush) { | |
| 107 if (m_deferred.isSet()) | |
| 108 dispatchProgressProgressEvent(m_deferred.take()); | |
| 109 | |
| 110 stop(); | |
| 111 } else if (action == Clear) { | |
| 112 m_deferred.clear(); | |
| 113 stop(); | |
| 114 } | |
| 115 | |
| 116 m_hasDispatchedProgressProgressEvent = false; | |
| 117 if (state == m_target->readyState()) { | |
| 118 // We don't dispatch the event when an event handler associated with | |
| 119 // the previously dispatched event changes the readyState (e.g. when | |
| 120 // the event handler calls xhr.abort()). In such cases a | |
| 121 // readystatechange should have been already dispatched if necessary. | |
| 122 m_target->dispatchEvent(event); | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 void ProgressEventThrottle::dispatchProgressProgressEvent(PassRefPtrWillBeRawPtr
<Event> progressEvent) | |
| 127 { | |
| 128 XMLHttpRequest::State state = m_target->readyState(); | |
| 129 if (m_target->readyState() == XMLHttpRequest::LOADING && m_hasDispatchedProg
ressProgressEvent) { | |
| 130 TRACE_EVENT1("devtools.timeline", "XHRReadyStateChange", "data", Inspect
orXhrReadyStateChangeEvent::data(m_target->executionContext(), m_target)); | |
| 131 m_target->dispatchEvent(Event::create(EventTypeNames::readystatechange))
; | |
| 132 TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Up
dateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::d
ata()); | |
| 133 } | |
| 134 | |
| 135 if (m_target->readyState() != state) | |
| 136 return; | |
| 137 | |
| 138 m_hasDispatchedProgressProgressEvent = true; | |
| 139 m_target->dispatchEvent(progressEvent); | |
| 140 } | |
| 141 | |
| 142 void ProgressEventThrottle::fired() | |
| 143 { | |
| 144 if (!m_deferred.isSet()) { | |
| 145 // No "progress" event was queued since the previous dispatch, we can | |
| 146 // safely stop the timer. | |
| 147 return; | |
| 148 } | |
| 149 | |
| 150 dispatchProgressProgressEvent(m_deferred.take()); | |
| 151 | |
| 152 // Watch if another "progress" ProgressEvent arrives in the next 50ms. | |
| 153 startOneShot(minimumProgressEventDispatchingIntervalInSeconds, BLINK_FROM_HE
RE); | |
| 154 } | |
| 155 | |
| 156 void ProgressEventThrottle::suspend() | |
| 157 { | |
| 158 stop(); | |
| 159 } | |
| 160 | |
| 161 void ProgressEventThrottle::resume() | |
| 162 { | |
| 163 if (!m_deferred.isSet()) | |
| 164 return; | |
| 165 | |
| 166 // Do not dispatch events inline here, since ExecutionContext is iterating | |
| 167 // over the list of active DOM objects to resume them, and any activated JS | |
| 168 // event-handler could insert new active DOM objects to the list. | |
| 169 startOneShot(0, BLINK_FROM_HERE); | |
| 170 } | |
| 171 | |
| 172 DEFINE_TRACE(ProgressEventThrottle) | |
| 173 { | |
| 174 visitor->trace(m_target); | |
| 175 } | |
| 176 | |
| 177 } // namespace blink | |
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Chromium Code Reviews
Issue 1686953006:
Revert of Rename XMLHttpRequestProgressEventThrottle to ProgressEventThrottle (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master