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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use dom_struct::dom_struct;
use js::rust::HandleObject;
use servo_media::streams::registry::MediaStreamId;
use servo_media::streams::MediaStreamType;

use crate::dom::bindings::cell::{DomRefCell, Ref};
use crate::dom::bindings::codegen::Bindings::MediaStreamBinding::MediaStreamMethods;
use crate::dom::bindings::error::Fallible;
use crate::dom::bindings::reflector::{reflect_dom_object_with_proto, DomObject};
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::bindings::str::DOMString;
use crate::dom::eventtarget::EventTarget;
use crate::dom::globalscope::GlobalScope;
use crate::dom::mediastreamtrack::MediaStreamTrack;
use crate::dom::window::Window;

#[dom_struct]
pub struct MediaStream {
    eventtarget: EventTarget,
    tracks: DomRefCell<Vec<Dom<MediaStreamTrack>>>,
}

#[allow(non_snake_case)]
impl MediaStream {
    pub fn new_inherited() -> MediaStream {
        MediaStream {
            eventtarget: EventTarget::new_inherited(),
            tracks: DomRefCell::new(vec![]),
        }
    }

    pub fn new(global: &GlobalScope) -> DomRoot<MediaStream> {
        Self::new_with_proto(global, None)
    }

    fn new_with_proto(global: &GlobalScope, proto: Option<HandleObject>) -> DomRoot<MediaStream> {
        reflect_dom_object_with_proto(Box::new(MediaStream::new_inherited()), global, proto)
    }

    pub fn new_single(
        global: &GlobalScope,
        id: MediaStreamId,
        ty: MediaStreamType,
    ) -> DomRoot<MediaStream> {
        let this = Self::new(global);
        let track = MediaStreamTrack::new(global, id, ty);
        this.AddTrack(&track);
        this
    }

    pub fn Constructor(
        global: &Window,
        proto: Option<HandleObject>,
    ) -> Fallible<DomRoot<MediaStream>> {
        Ok(MediaStream::new_with_proto(&global.global(), proto))
    }

    pub fn Constructor_(
        _: &Window,
        proto: Option<HandleObject>,
        stream: &MediaStream,
    ) -> Fallible<DomRoot<MediaStream>> {
        Ok(stream.clone_with_proto(proto))
    }

    pub fn Constructor__(
        global: &Window,
        proto: Option<HandleObject>,
        tracks: Vec<DomRoot<MediaStreamTrack>>,
    ) -> Fallible<DomRoot<MediaStream>> {
        let new = MediaStream::new_with_proto(&global.global(), proto);
        for track in tracks {
            // this is quadratic, but shouldn't matter much
            // if this becomes a problem we can use a hash map
            new.AddTrack(&track)
        }
        Ok(new)
    }

    pub fn get_tracks(&self) -> Ref<[Dom<MediaStreamTrack>]> {
        Ref::map(self.tracks.borrow(), |tracks| &**tracks)
    }

    pub fn add_track(&self, track: &MediaStreamTrack) {
        self.tracks.borrow_mut().push(Dom::from_ref(track))
    }
}

impl MediaStreamMethods for MediaStream {
    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-gettracks>
    fn GetTracks(&self) -> Vec<DomRoot<MediaStreamTrack>> {
        self.tracks
            .borrow()
            .iter()
            .map(|x| DomRoot::from_ref(&**x))
            .collect()
    }

    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-getaudiotracks>
    fn GetAudioTracks(&self) -> Vec<DomRoot<MediaStreamTrack>> {
        self.tracks
            .borrow()
            .iter()
            .filter(|x| x.ty() == MediaStreamType::Audio)
            .map(|x| DomRoot::from_ref(&**x))
            .collect()
    }

    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-getvideotracks>
    fn GetVideoTracks(&self) -> Vec<DomRoot<MediaStreamTrack>> {
        self.tracks
            .borrow()
            .iter()
            .filter(|x| x.ty() == MediaStreamType::Video)
            .map(|x| DomRoot::from_ref(&**x))
            .collect()
    }

    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-gettrackbyid>
    fn GetTrackById(&self, id: DOMString) -> Option<DomRoot<MediaStreamTrack>> {
        self.tracks
            .borrow()
            .iter()
            .find(|x| x.id().id().to_string() == *id)
            .map(|x| DomRoot::from_ref(&**x))
    }

    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-addtrack>
    fn AddTrack(&self, track: &MediaStreamTrack) {
        let existing = self.tracks.borrow().iter().any(|x| x == &track);

        if existing {
            return;
        }
        self.add_track(track)
    }

    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-removetrack>
    fn RemoveTrack(&self, track: &MediaStreamTrack) {
        self.tracks.borrow_mut().retain(|x| *x != track);
    }

    /// <https://w3c.github.io/mediacapture-main/#dom-mediastream-clone>
    fn Clone(&self) -> DomRoot<MediaStream> {
        self.clone_with_proto(None)
    }
}

impl MediaStream {
    fn clone_with_proto(&self, proto: Option<HandleObject>) -> DomRoot<MediaStream> {
        let new = MediaStream::new_with_proto(&self.global(), proto);
        for track in &*self.tracks.borrow() {
            new.add_track(track)
        }
        new
    }
}