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|
use scene::{AudioElement, Element, ElementRef, ParamValue, Project, SceneTracks};
use timeline::placement::apply::ApplyPlacementParams;
use timeline::placement::{
PlacementResult, PlacementStrategy, PlacementSubject, PlacementTimeSpan,
ResolveTrackPlacementParams, apply_placement, can_element_go_on_track,
resolve_track_placement,
};
use timeline::{ElementType, TrackType};
use uuid::Uuid;
use crate::command::{Command, CommandError, CommandResult};
use crate::project_ext::active_scene_mut;
#[derive(Clone, Debug, PartialEq)]
pub enum InsertElementPlacement {
Explicit {
track_id: String,
},
Auto {
track_type: Option<TrackType>,
insert_index: Option<usize>,
},
}
fn requires_media_id(element: &Element) -> bool {
matches!(
element,
Element::Video(_) | Element::Image(_) | Element::Audio(AudioElement::Upload(_))
)
}
fn has_media_id_value(element: &Element) -> bool {
match element {
Element::Video(video) => !video.media_id.is_empty(),
Element::Image(image) => !image.media_id.is_empty(),
Element::Audio(AudioElement::Upload(upload)) => !upload.media_id.is_empty(),
_ => false,
}
}
fn validate_element_basics(element: &Element) -> bool {
if requires_media_id(element) && !has_media_id_value(element) {
return false;
}
match element {
Element::Audio(AudioElement::Library(library)) => !library.source_url.is_empty(),
Element::Sticker(sticker) => !sticker.sticker_id.is_empty(),
Element::Graphic(graphic) => !graphic.definition_id.is_empty(),
Element::Text(text) => matches!(
text.base.params.get("content"),
Some(ParamValue::String(content)) if !content.is_empty()
),
Element::Effect(effect) => !effect.effect_type.is_empty(),
_ => true,
}
}
pub struct InsertElementCommand {
element: Element,
placement: InsertElementPlacement,
element_id: String,
target_track_id: Option<String>,
saved_state: Option<SceneTracks>,
}
impl InsertElementCommand {
pub fn new(element: Element, placement: InsertElementPlacement) -> Self {
Self {
element,
placement,
element_id: Uuid::new_v4().to_string(),
target_track_id: None,
saved_state: None,
}
}
pub fn element_id(&self) -> &str {
&self.element_id
}
pub fn track_id(&self) -> Option<&str> {
self.target_track_id.as_deref()
}
fn apply_placement_result(
&self,
tracks: &SceneTracks,
element: &Element,
) -> Option<(SceneTracks, String)> {
let element_type = ElementType::of_element(element);
if let InsertElementPlacement::Auto {
track_type: Some(track_type),
..
} = &self.placement
&& !can_element_go_on_track(element_type, *track_type)
{
return None;
}
let subject = match &self.placement {
InsertElementPlacement::Auto {
track_type: Some(track_type),
..
} => PlacementSubject::TrackType(*track_type),
_ => PlacementSubject::ElementType(element_type),
};
let strategy = match &self.placement {
InsertElementPlacement::Explicit { track_id } => PlacementStrategy::Explicit {
track_id: track_id.clone(),
},
InsertElementPlacement::Auto { .. } => PlacementStrategy::FirstAvailable,
};
let placement_result = resolve_track_placement(&ResolveTrackPlacementParams {
tracks: tracks.clone(),
subject,
time_spans: vec![PlacementTimeSpan {
start_time: element.base().start_time,
duration: element.base().duration,
exclude_element_id: None,
}],
strategy,
})?;
let mut element_to_place = element.clone();
if let PlacementResult::ExistingTrack {
adjusted_start_time: Some(adjusted),
..
} = &placement_result
{
element_to_place.base_mut().start_time = *adjusted;
}
let insert_index_override = match &self.placement {
InsertElementPlacement::Auto { insert_index, .. } => *insert_index,
InsertElementPlacement::Explicit { .. } => None,
};
let applied = apply_placement(&ApplyPlacementParams {
tracks: tracks.clone(),
placement_result,
elements: vec![element_to_place],
new_track_id: Uuid::new_v4().to_string(),
new_track_insert_index_override: insert_index_override,
})?;
Some((applied.updated_tracks, applied.target_track_id))
}
}
impl Command for InsertElementCommand {
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());
if !validate_element_basics(&self.element) {
return Ok(None);
}
let mut new_element = self.element.clone();
new_element.base_mut().id = self.element_id.clone();
let Some((updated_tracks, target_track_id)) =
self.apply_placement_result(&scene.tracks, &new_element)
else {
return Ok(None);
};
self.target_track_id = Some(target_track_id.clone());
scene.tracks = updated_tracks;
Ok(Some(CommandResult::element_selection(vec![ElementRef {
track_id: target_track_id,
element_id: self.element_id.clone(),
}])))
}
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();
}
}
}
|
