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use scene::{ElementRef, Project};
use thiserror::Error;
#[derive(Debug, Error)]
pub enum CommandError {
#[error("source track or element not found")]
SourceNotFound,
#[error("target track not found")]
TargetTrackNotFound,
#[error("{0}")]
IncompatiblePlacement(String),
}
#[derive(Clone, Debug, Default, PartialEq)]
pub struct SelectionPatch {
pub selected_elements: Vec<ElementRef>,
}
#[derive(Clone, Debug, Default, PartialEq)]
pub struct CommandResult {
pub selection: Option<SelectionPatch>,
}
impl CommandResult {
pub fn element_selection(selected_elements: Vec<ElementRef>) -> Self {
Self {
selection: Some(SelectionPatch { selected_elements }),
}
}
}
pub trait Command {
fn execute(
&mut self,
project: &mut Project,
) -> Result<Option<CommandResult>, CommandError>;
fn undo(&mut self, project: &mut Project);
fn redo(
&mut self,
project: &mut Project,
) -> Result<Option<CommandResult>, CommandError> {
self.execute(project)
}
}
|
