| /* |
| * Copyright (C) 2010 Julien Chaffraix <jchaffraix@webkit.org> All right reserved. |
| * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies) |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h" |
| |
| #include "core/EventTypeNames.h" |
| #include "core/dom/TaskRunnerHelper.h" |
| #include "core/events/ProgressEvent.h" |
| #include "core/inspector/InspectorInstrumentation.h" |
| #include "core/inspector/InspectorTraceEvents.h" |
| #include "core/xmlhttprequest/XMLHttpRequest.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebScheduler.h" |
| #include "public/platform/WebThread.h" |
| #include "wtf/Assertions.h" |
| #include "wtf/text/AtomicString.h" |
| |
| namespace blink { |
| |
| static const double kMinimumProgressEventDispatchingIntervalInSeconds = .05; // 50 ms per specification. |
| |
| XMLHttpRequestProgressEventThrottle::DeferredEvent::DeferredEvent() |
| { |
| clear(); |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::DeferredEvent::set(bool lengthComputable, unsigned long long loaded, unsigned long long total) |
| { |
| m_isSet = true; |
| |
| m_lengthComputable = lengthComputable; |
| m_loaded = loaded; |
| m_total = total; |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::DeferredEvent::clear() |
| { |
| m_isSet = false; |
| |
| m_lengthComputable = false; |
| m_loaded = 0; |
| m_total = 0; |
| } |
| |
| Event* XMLHttpRequestProgressEventThrottle::DeferredEvent::take() |
| { |
| DCHECK(m_isSet); |
| |
| Event* event = ProgressEvent::create(EventTypeNames::progress, m_lengthComputable, m_loaded, m_total); |
| clear(); |
| return event; |
| } |
| |
| XMLHttpRequestProgressEventThrottle::XMLHttpRequestProgressEventThrottle(XMLHttpRequest* target) |
| : TimerBase(TaskRunnerHelper::get(TaskType::Networking, target->getExecutionContext())) |
| , m_target(target) |
| , m_hasDispatchedProgressProgressEvent(false) |
| { |
| DCHECK(target); |
| } |
| |
| XMLHttpRequestProgressEventThrottle::~XMLHttpRequestProgressEventThrottle() |
| { |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::dispatchProgressEvent(const AtomicString& type, bool lengthComputable, unsigned long long loaded, unsigned long long total) |
| { |
| // Given that ResourceDispatcher doesn't deliver an event when suspended, |
| // we don't have to worry about event dispatching while suspended. |
| if (type != EventTypeNames::progress) { |
| m_target->dispatchEvent(ProgressEvent::create(type, lengthComputable, loaded, total)); |
| return; |
| } |
| |
| if (isActive()) { |
| m_deferred.set(lengthComputable, loaded, total); |
| } else { |
| dispatchProgressProgressEvent(ProgressEvent::create(EventTypeNames::progress, lengthComputable, loaded, total)); |
| startOneShot(kMinimumProgressEventDispatchingIntervalInSeconds, BLINK_FROM_HERE); |
| } |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::dispatchReadyStateChangeEvent(Event* event, DeferredEventAction action) |
| { |
| XMLHttpRequest::State state = m_target->readyState(); |
| // Given that ResourceDispatcher doesn't deliver an event when suspended, |
| // we don't have to worry about event dispatching while suspended. |
| if (action == Flush) { |
| if (m_deferred.isSet()) |
| dispatchProgressProgressEvent(m_deferred.take()); |
| |
| stop(); |
| } else if (action == Clear) { |
| m_deferred.clear(); |
| stop(); |
| } |
| |
| m_hasDispatchedProgressProgressEvent = false; |
| if (state == m_target->readyState()) { |
| // We don't dispatch the event when an event handler associated with |
| // the previously dispatched event changes the readyState (e.g. when |
| // the event handler calls xhr.abort()). In such cases a |
| // readystatechange should have been already dispatched if necessary. |
| InspectorInstrumentation::AsyncTask asyncTask(m_target->getExecutionContext(), m_target, m_target->isAsync()); |
| m_target->dispatchEvent(event); |
| } |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::dispatchProgressProgressEvent(Event* progressEvent) |
| { |
| XMLHttpRequest::State state = m_target->readyState(); |
| if (m_target->readyState() == XMLHttpRequest::kLoading && m_hasDispatchedProgressProgressEvent) { |
| TRACE_EVENT1("devtools.timeline", "XHRReadyStateChange", "data", InspectorXhrReadyStateChangeEvent::data(m_target->getExecutionContext(), m_target)); |
| InspectorInstrumentation::AsyncTask asyncTask(m_target->getExecutionContext(), m_target, m_target->isAsync()); |
| m_target->dispatchEvent(Event::create(EventTypeNames::readystatechange)); |
| TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data()); |
| } |
| |
| if (m_target->readyState() != state) |
| return; |
| |
| m_hasDispatchedProgressProgressEvent = true; |
| InspectorInstrumentation::AsyncTask asyncTask(m_target->getExecutionContext(), m_target, m_target->isAsync()); |
| m_target->dispatchEvent(progressEvent); |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::fired() |
| { |
| if (!m_deferred.isSet()) { |
| // No "progress" event was queued since the previous dispatch, we can |
| // safely stop the timer. |
| return; |
| } |
| |
| dispatchProgressProgressEvent(m_deferred.take()); |
| |
| // Watch if another "progress" ProgressEvent arrives in the next 50ms. |
| startOneShot(kMinimumProgressEventDispatchingIntervalInSeconds, BLINK_FROM_HERE); |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::suspend() |
| { |
| stop(); |
| } |
| |
| void XMLHttpRequestProgressEventThrottle::resume() |
| { |
| if (!m_deferred.isSet()) |
| return; |
| |
| // Do not dispatch events inline here, since ExecutionContext is iterating |
| // over the list of active DOM objects to resume them, and any activated JS |
| // event-handler could insert new active DOM objects to the list. |
| startOneShot(0, BLINK_FROM_HERE); |
| } |
| |
| DEFINE_TRACE(XMLHttpRequestProgressEventThrottle) |
| { |
| visitor->trace(m_target); |
| } |
| |
| } // namespace blink |