weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 INC. AND ITS CONTRIBUTORS ``AS IS'' |
| 14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| 17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 23 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 24 | */ |
| 25 | |
| 26 | #include "config.h" |
| 27 | #include "AbortSignal.h" |
| 28 | |
| 29 | #include "Event.h" |
| 30 | #include "EventNames.h" |
| 31 | #include "ScriptExecutionContext.h" |
ysuzuki@apple.com | 637c0c3 | 2019-04-04 19:07:53 +0000 | [diff] [blame] | 32 | #include <wtf/IsoMallocInlines.h> |
weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 33 | |
| 34 | namespace WebCore { |
| 35 | |
ysuzuki@apple.com | 637c0c3 | 2019-04-04 19:07:53 +0000 | [diff] [blame] | 36 | WTF_MAKE_ISO_ALLOCATED_IMPL(AbortSignal); |
| 37 | |
weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 38 | Ref<AbortSignal> AbortSignal::create(ScriptExecutionContext& context) |
| 39 | { |
| 40 | return adoptRef(*new AbortSignal(context)); |
| 41 | } |
| 42 | |
weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 43 | AbortSignal::AbortSignal(ScriptExecutionContext& context) |
| 44 | : ContextDestructionObserver(&context) |
| 45 | { |
| 46 | } |
| 47 | |
| 48 | // https://dom.spec.whatwg.org/#abortsignal-signal-abort |
| 49 | void AbortSignal::abort() |
| 50 | { |
| 51 | // 1. If signal's aborted flag is set, then return. |
| 52 | if (m_aborted) |
| 53 | return; |
| 54 | |
| 55 | // 2. Set signal’s aborted flag. |
| 56 | m_aborted = true; |
youenn@apple.com | 68dd54b | 2019-01-05 00:01:43 +0000 | [diff] [blame] | 57 | |
| 58 | auto protectedThis = makeRef(*this); |
| 59 | auto algorithms = WTFMove(m_algorithms); |
| 60 | for (auto& algorithm : algorithms) |
| 61 | algorithm(); |
weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 62 | |
| 63 | // 5. Fire an event named abort at signal. |
rniwa@webkit.org | 6c40374 | 2018-08-17 21:24:40 +0000 | [diff] [blame] | 64 | dispatchEvent(Event::create(eventNames().abortEvent, Event::CanBubble::No, Event::IsCancelable::No)); |
weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 65 | } |
| 66 | |
youenn@apple.com | 68dd54b | 2019-01-05 00:01:43 +0000 | [diff] [blame] | 67 | // https://dom.spec.whatwg.org/#abortsignal-follow |
| 68 | void AbortSignal::follow(AbortSignal& signal) |
| 69 | { |
| 70 | if (aborted()) |
| 71 | return; |
| 72 | |
| 73 | if (signal.aborted()) { |
| 74 | abort(); |
| 75 | return; |
| 76 | } |
| 77 | |
youenn@apple.com | d446245 | 2019-10-04 16:31:21 +0000 | [diff] [blame] | 78 | ASSERT(!m_followingSignal); |
| 79 | m_followingSignal = makeWeakPtr(signal); |
youenn@apple.com | 68dd54b | 2019-01-05 00:01:43 +0000 | [diff] [blame] | 80 | signal.addAlgorithm([weakThis = makeWeakPtr(this)] { |
| 81 | if (!weakThis) |
| 82 | return; |
| 83 | weakThis->abort(); |
| 84 | }); |
| 85 | } |
| 86 | |
weinig@apple.com | 710d0f8 | 2017-10-01 22:32:58 +0000 | [diff] [blame] | 87 | } |