Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
| 3 | * Copyright (C) 2013 Google Inc. All Rights Reserved. |
| 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 APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| 15 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 17 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| 18 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 19 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 20 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 21 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| 22 | * 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 | |
| 28 | #include "config.h" |
| 29 | #include "core/dom/ContextLifecycleNotifier.h" |
| 30 | |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 31 | #include "core/dom/ScriptExecutionContext.h" |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 32 | #include "wtf/TemporaryChange.h" |
| 33 | |
| 34 | namespace WebCore { |
| 35 | |
| 36 | ContextLifecycleNotifier::ContextLifecycleNotifier(ScriptExecutionContext* context) |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 37 | : LifecycleNotifier(context) |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 38 | { |
| 39 | } |
| 40 | |
| 41 | ContextLifecycleNotifier::~ContextLifecycleNotifier() |
| 42 | { |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 43 | } |
| 44 | |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 45 | void ContextLifecycleNotifier::addObserver(LifecycleObserver* observer, LifecycleObserver::Type type) |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 46 | { |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 47 | LifecycleNotifier::addObserver(observer, type); |
| 48 | |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 49 | RELEASE_ASSERT(m_iterating != IteratingOverContextObservers); |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 50 | if (type == LifecycleObserver::ActiveDOMObjectType) { |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 51 | RELEASE_ASSERT(m_iterating != IteratingOverActiveDOMObjects); |
| 52 | m_activeDOMObjects.add(static_cast<ActiveDOMObject*>(observer)); |
| 53 | } |
| 54 | } |
| 55 | |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 56 | void ContextLifecycleNotifier::removeObserver(LifecycleObserver* observer, LifecycleObserver::Type type) |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 57 | { |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 58 | LifecycleNotifier::removeObserver(observer, type); |
| 59 | |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 60 | RELEASE_ASSERT(m_iterating != IteratingOverContextObservers); |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 61 | if (type == LifecycleObserver::ActiveDOMObjectType) { |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 62 | RELEASE_ASSERT(m_iterating != IteratingOverActiveDOMObjects); |
| 63 | m_activeDOMObjects.remove(static_cast<ActiveDOMObject*>(observer)); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | void ContextLifecycleNotifier::notifyResumingActiveDOMObjects() |
| 68 | { |
| 69 | TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects); |
| 70 | ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end(); |
| 71 | for (ActiveDOMObjectSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) { |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 72 | ASSERT((*iter)->scriptExecutionContext() == context()); |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 73 | ASSERT((*iter)->suspendIfNeededCalled()); |
| 74 | (*iter)->resume(); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | void ContextLifecycleNotifier::notifySuspendingActiveDOMObjects(ActiveDOMObject::ReasonForSuspension why) |
| 79 | { |
| 80 | TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects); |
| 81 | ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end(); |
| 82 | for (ActiveDOMObjectSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) { |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 83 | ASSERT((*iter)->scriptExecutionContext() == context()); |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 84 | ASSERT((*iter)->suspendIfNeededCalled()); |
| 85 | (*iter)->suspend(why); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | void ContextLifecycleNotifier::notifyStoppingActiveDOMObjects() |
| 90 | { |
| 91 | TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects); |
| 92 | ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end(); |
| 93 | for (ActiveDOMObjectSet::iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) { |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 94 | ASSERT((*iter)->scriptExecutionContext() == context()); |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 95 | ASSERT((*iter)->suspendIfNeededCalled()); |
| 96 | (*iter)->stop(); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | bool ContextLifecycleNotifier::canSuspendActiveDOMObjects() |
| 101 | { |
| 102 | TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverActiveDOMObjects); |
| 103 | ActiveDOMObjectSet::iterator activeObjectsEnd = m_activeDOMObjects.end(); |
| 104 | for (ActiveDOMObjectSet::const_iterator iter = m_activeDOMObjects.begin(); iter != activeObjectsEnd; ++iter) { |
Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 105 | ASSERT((*iter)->scriptExecutionContext() == context()); |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 106 | ASSERT((*iter)->suspendIfNeededCalled()); |
| 107 | if (!(*iter)->canSuspend()) |
| 108 | return false; |
| 109 | } |
| 110 | |
| 111 | return true; |
| 112 | } |
| 113 | |
| 114 | bool ContextLifecycleNotifier::hasPendingActivity() const |
| 115 | { |
| 116 | ActiveDOMObjectSet::const_iterator activeObjectsEnd = activeDOMObjects().end(); |
| 117 | for (ActiveDOMObjectSet::const_iterator iter = activeDOMObjects().begin(); iter != activeObjectsEnd; ++iter) { |
| 118 | if ((*iter)->hasPendingActivity()) |
| 119 | return true; |
| 120 | } |
| 121 | |
| 122 | return false; |
| 123 | } |
| 124 | |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 125 | } // namespace WebCore |
| 126 | |