Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 COMPUTER, 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 COMPUTER, 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 |
Ben Murdoch | 02772c6 | 2013-07-26 10:21:05 +0100 | [diff] [blame] | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 24 | * |
| 25 | */ |
| 26 | |
| 27 | #include "config.h" |
| 28 | #include "core/dom/ActiveDOMObject.h" |
| 29 | |
| 30 | #include "core/dom/ScriptExecutionContext.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 31 | |
| 32 | namespace WebCore { |
| 33 | |
| 34 | ActiveDOMObject::ActiveDOMObject(ScriptExecutionContext* scriptExecutionContext) |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 35 | : ContextLifecycleObserver(scriptExecutionContext, ActiveDOMObjectType) |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 36 | , m_pendingActivityCount(0) |
| 37 | #if !ASSERT_DISABLED |
| 38 | , m_suspendIfNeededCalled(false) |
| 39 | #endif |
| 40 | { |
| 41 | if (!m_scriptExecutionContext) |
| 42 | return; |
| 43 | |
| 44 | ASSERT(m_scriptExecutionContext->isContextThread()); |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | ActiveDOMObject::~ActiveDOMObject() |
| 48 | { |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 49 | // ActiveDOMObject may be inherited by a sub-class whose life-cycle |
| 50 | // exceeds that of the associated ScriptExecutionContext. In those cases, |
| 51 | // m_scriptExecutionContext would/should have been nullified by |
| 52 | // ContextLifecycleObserver::contextDestroyed() (which we implement / |
| 53 | // inherit). Hence, we should ensure that this is not 0 before use it |
| 54 | // here. |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 55 | if (!m_scriptExecutionContext) |
| 56 | return; |
| 57 | |
| 58 | ASSERT(m_suspendIfNeededCalled); |
Ben Murdoch | 591b958 | 2013-07-10 11:41:44 +0100 | [diff] [blame] | 59 | ASSERT(m_scriptExecutionContext->isContextThread()); |
| 60 | observeContext(0, ActiveDOMObjectType); |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | void ActiveDOMObject::suspendIfNeeded() |
| 64 | { |
| 65 | #if !ASSERT_DISABLED |
| 66 | ASSERT(!m_suspendIfNeededCalled); |
| 67 | m_suspendIfNeededCalled = true; |
| 68 | #endif |
| 69 | if (!m_scriptExecutionContext) |
| 70 | return; |
| 71 | |
| 72 | m_scriptExecutionContext->suspendActiveDOMObjectIfNeeded(this); |
| 73 | } |
| 74 | |
| 75 | bool ActiveDOMObject::hasPendingActivity() const |
| 76 | { |
| 77 | return m_pendingActivityCount; |
| 78 | } |
| 79 | |
| 80 | bool ActiveDOMObject::canSuspend() const |
| 81 | { |
| 82 | return false; |
| 83 | } |
| 84 | |
| 85 | void ActiveDOMObject::suspend(ReasonForSuspension) |
| 86 | { |
| 87 | } |
| 88 | |
| 89 | void ActiveDOMObject::resume() |
| 90 | { |
| 91 | } |
| 92 | |
| 93 | void ActiveDOMObject::stop() |
| 94 | { |
| 95 | } |
| 96 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 97 | } // namespace WebCore |