script/dom/
broadcastchannel.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5use std::cell::Cell;
6
7use constellation_traits::BroadcastChannelMsg;
8use dom_struct::dom_struct;
9use js::context::JSContext;
10use js::rust::{HandleObject, HandleValue};
11use uuid::Uuid;
12
13use crate::dom::bindings::codegen::Bindings::BroadcastChannelBinding::BroadcastChannelMethods;
14use crate::dom::bindings::error::{Error, ErrorResult};
15use crate::dom::bindings::reflector::{DomGlobal, reflect_dom_object_with_proto};
16use crate::dom::bindings::root::DomRoot;
17use crate::dom::bindings::str::DOMString;
18use crate::dom::bindings::structuredclone;
19use crate::dom::eventtarget::EventTarget;
20use crate::dom::globalscope::GlobalScope;
21use crate::script_runtime::CanGc;
22
23#[dom_struct]
24pub(crate) struct BroadcastChannel {
25    eventtarget: EventTarget,
26    name: DOMString,
27    closed: Cell<bool>,
28    #[no_trace]
29    id: Uuid,
30}
31
32impl BroadcastChannel {
33    fn new(
34        global: &GlobalScope,
35        proto: Option<HandleObject>,
36        name: DOMString,
37        can_gc: CanGc,
38    ) -> DomRoot<BroadcastChannel> {
39        let channel = reflect_dom_object_with_proto(
40            Box::new(BroadcastChannel::new_inherited(name)),
41            global,
42            proto,
43            can_gc,
44        );
45        global.track_broadcast_channel(&channel);
46        channel
47    }
48
49    pub(crate) fn new_inherited(name: DOMString) -> BroadcastChannel {
50        BroadcastChannel {
51            eventtarget: EventTarget::new_inherited(),
52            name,
53            closed: Default::default(),
54            id: Uuid::new_v4(),
55        }
56    }
57
58    /// The unique Id of this channel.
59    /// Used for filtering out the sender from the local broadcast.
60    pub(crate) fn id(&self) -> &Uuid {
61        &self.id
62    }
63
64    /// Is this channel closed?
65    pub(crate) fn closed(&self) -> bool {
66        self.closed.get()
67    }
68}
69
70impl BroadcastChannelMethods<crate::DomTypeHolder> for BroadcastChannel {
71    /// <https://html.spec.whatwg.org/multipage/#broadcastchannel>
72    fn Constructor(
73        global: &GlobalScope,
74        proto: Option<HandleObject>,
75        can_gc: CanGc,
76        name: DOMString,
77    ) -> DomRoot<BroadcastChannel> {
78        BroadcastChannel::new(global, proto, name, can_gc)
79    }
80
81    /// <https://html.spec.whatwg.org/multipage/#dom-messageport-postmessage>
82    fn PostMessage(&self, cx: &mut JSContext, message: HandleValue) -> ErrorResult {
83        // Step 3, if closed.
84        if self.closed.get() {
85            return Err(Error::InvalidState(None));
86        }
87
88        // Step 6, StructuredSerialize(message).
89        let data = structuredclone::write(cx.into(), message, None)?;
90
91        let global = self.global();
92
93        let msg = BroadcastChannelMsg {
94            origin: global.origin().immutable().clone(),
95            channel_name: self.Name().to_string(),
96            data,
97        };
98
99        global.schedule_broadcast(msg, &self.id);
100        Ok(())
101    }
102
103    /// <https://html.spec.whatwg.org/multipage/#dom-broadcastchannel-name>
104    fn Name(&self) -> DOMString {
105        self.name.clone()
106    }
107
108    /// <https://html.spec.whatwg.org/multipage/#dom-broadcastchannel-close>
109    fn Close(&self) {
110        self.closed.set(true);
111    }
112
113    // <https://html.spec.whatwg.org/multipage/#handler-broadcastchannel-onmessageerror>
114    event_handler!(messageerror, GetOnmessageerror, SetOnmessageerror);
115
116    // <https://html.spec.whatwg.org/multipage/#handler-broadcastchannel-onmessage>
117    event_handler!(message, GetOnmessage, SetOnmessage);
118}
script/dom/broadcastchannel.rs

script/dom/
broadcastchannel.rs
