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
|
use scene::{Project, SceneTracks};
use timeline::placement::{build_empty_track, get_default_insert_index_for_track};
use timeline::TrackType;
use uuid::Uuid;
use crate::command::{Command, CommandError, CommandResult};
use crate::project_ext::active_scene_mut;
pub struct AddTrackCommand {
track_type: TrackType,
index: Option<usize>,
track_id: String,
saved_state: Option<SceneTracks>,
}
impl AddTrackCommand {
pub fn new(track_type: TrackType, index: Option<usize>) -> Self {
Self {
track_type,
index,
track_id: Uuid::new_v4().to_string(),
saved_state: None,
}
}
pub fn track_id(&self) -> &str {
&self.track_id
}
}
impl Command for AddTrackCommand {
fn execute(
&mut self,
project: &mut Project,
) -> Result<Option<CommandResult>, CommandError> {
let Some(scene) = active_scene_mut(project) else {
return Ok(None);
};
self.saved_state = Some(scene.tracks.clone());
let insert_index = self.index.unwrap_or_else(|| {
get_default_insert_index_for_track(&scene.tracks, self.track_type)
});
let new_track = build_empty_track(self.track_id.clone(), self.track_type, None);
if self.track_type == TrackType::Audio {
let audio_insert_index = insert_index
.saturating_sub(scene.tracks.overlay.len() + 1);
scene
.tracks
.audio
.insert(audio_insert_index.min(scene.tracks.audio.len()), new_track);
} else {
let overlay_insert_index = insert_index.min(scene.tracks.overlay.len());
scene.tracks.overlay.insert(overlay_insert_index, new_track);
}
Ok(None)
}
fn undo(&mut self, project: &mut Project) {
let Some(saved) = &self.saved_state else {
return;
};
if let Some(scene) = active_scene_mut(project) {
scene.tracks = saved.clone();
}
}
}
|
