1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/DOM/AbortSignal.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/EventDispatcher.h>
#include <LibWeb/HTML/EventHandler.h>
namespace Web::DOM {
WebIDL::ExceptionOr<JS::NonnullGCPtr<AbortSignal>> AbortSignal::construct_impl(JS::Realm& realm)
{
return MUST_OR_THROW_OOM(realm.heap().allocate<AbortSignal>(realm, realm));
}
AbortSignal::AbortSignal(JS::Realm& realm)
: EventTarget(realm)
{
}
JS::ThrowCompletionOr<void> AbortSignal::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::AbortSignalPrototype>(realm, "AbortSignal"));
return {};
}
// https://dom.spec.whatwg.org/#abortsignal-add
void AbortSignal::add_abort_algorithm(JS::SafeFunction<void()> abort_algorithm)
{
// 1. If signal is aborted, then return.
if (aborted())
return;
// 2. Append algorithm to signal’s abort algorithms.
m_abort_algorithms.append(move(abort_algorithm));
}
// https://dom.spec.whatwg.org/#abortsignal-signal-abort
void AbortSignal::signal_abort(JS::Value reason)
{
// 1. If signal is aborted, then return.
if (aborted())
return;
// 2. Set signal’s abort reason to reason if it is given; otherwise to a new "AbortError" DOMException.
if (!reason.is_undefined())
m_abort_reason = reason;
else
m_abort_reason = WebIDL::AbortError::create(realm(), "Aborted without reason").ptr();
// 3. For each algorithm in signal’s abort algorithms: run algorithm.
for (auto& algorithm : m_abort_algorithms)
algorithm();
// 4. Empty signal’s abort algorithms.
m_abort_algorithms.clear();
// 5. Fire an event named abort at signal.
dispatch_event(Event::create(realm(), HTML::EventNames::abort).release_value_but_fixme_should_propagate_errors());
}
void AbortSignal::set_onabort(WebIDL::CallbackType* event_handler)
{
set_event_handler_attribute(HTML::EventNames::abort, event_handler);
}
WebIDL::CallbackType* AbortSignal::onabort()
{
return event_handler_attribute(HTML::EventNames::abort);
}
// https://dom.spec.whatwg.org/#dom-abortsignal-throwifaborted
JS::ThrowCompletionOr<void> AbortSignal::throw_if_aborted() const
{
// The throwIfAborted() method steps are to throw this’s abort reason, if this is aborted.
if (!aborted())
return {};
return JS::throw_completion(m_abort_reason);
}
void AbortSignal::visit_edges(JS::Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_abort_reason);
}
// https://dom.spec.whatwg.org/#abortsignal-follow
void AbortSignal::follow(JS::NonnullGCPtr<AbortSignal> parent_signal)
{
// A followingSignal (an AbortSignal) is made to follow a parentSignal (an AbortSignal) by running these steps:
// 1. If followingSignal is aborted, then return.
if (aborted())
return;
// 2. If parentSignal is aborted, then signal abort on followingSignal with parentSignal’s abort reason.
if (parent_signal->aborted()) {
signal_abort(parent_signal->reason());
return;
}
// 3. Otherwise, add the following abort steps to parentSignal:
// NOTE: `this` and `parent_signal` are protected by AbortSignal using JS::SafeFunction.
parent_signal->add_abort_algorithm([this, parent_signal] {
// 1. Signal abort on followingSignal with parentSignal’s abort reason.
signal_abort(parent_signal->reason());
});
}
}
|
