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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| use std::time::Duration; | ||
| use ratatui::buffer::Buffer; | ||
| use ratatui::layout::Rect; | ||
| use crate::{CellFilter, CellIterator, Effect, EffectTimer, Shader}; | ||
| use crate::Interpolation::Linear; | ||
| use crate::widget::EffectSpan; | ||
|
|
||
| /// Specifies the position where the additional duration should be applied in a `Prolong` effect. | ||
| #[derive(Clone, Copy, PartialEq)] | ||
| pub(crate) enum ProlongPosition { | ||
| Start, | ||
| End, | ||
| } | ||
|
|
||
| #[derive(Clone)] | ||
| pub struct Prolong { | ||
| inner: Effect, | ||
| timer: EffectTimer, | ||
| position: ProlongPosition, | ||
| } | ||
|
|
||
| impl Prolong { | ||
| pub fn new( | ||
| position: ProlongPosition, | ||
| additional_duration: EffectTimer, | ||
| inner: Effect, | ||
| ) -> Self { | ||
| Self { | ||
| inner, | ||
| timer: additional_duration, | ||
| position, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// A shader that wraps an inner effect and prolongs its duration either at the start or end. | ||
| impl Shader for Prolong { | ||
| fn name(&self) -> &'static str { | ||
| match self.position { | ||
| ProlongPosition::Start => "prolong_start", | ||
| ProlongPosition::End => "prolong_end", | ||
| } | ||
| } | ||
|
|
||
| fn process(&mut self, duration: Duration, buf: &mut Buffer, area: Rect) -> Option<Duration> { | ||
| match self.position { | ||
| ProlongPosition::Start => { | ||
| let overflow = self.timer.process(duration); | ||
| self.inner.process(overflow.unwrap_or_default(), buf, area) | ||
| } | ||
| ProlongPosition::End => { | ||
| let overflow = self.inner.process(duration, buf, area); | ||
| self.timer.process(overflow?) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn execute(&mut self, alpha: f32, area: Rect, cell_iter: CellIterator) {} | ||
|
|
||
| /// Checks if the prolonged effect is done. | ||
| /// | ||
| /// # Returns | ||
| /// | ||
| /// `true` if both the additional duration and inner effect are done, `false` otherwise. | ||
| fn done(&self) -> bool { | ||
| self.timer.done() && self.inner.done() | ||
| } | ||
|
|
||
| fn clone_box(&self) -> Box<dyn Shader> { | ||
| Box::new(self.clone()) | ||
| } | ||
|
|
||
| fn area(&self) -> Option<Rect> { | ||
| self.inner.area() | ||
| } | ||
|
|
||
| fn set_area(&mut self, area: Rect) { | ||
| self.inner.set_area(area); | ||
| } | ||
|
|
||
| fn set_cell_selection(&mut self, strategy: CellFilter) { | ||
| self.inner.set_cell_selection(strategy); | ||
| } | ||
|
|
||
| /// Returns the total duration of the prolonged effect. | ||
| /// | ||
| /// # Returns | ||
| /// | ||
| /// An `EffectTimer` representing the sum of the additional duration and the inner effect's duration. | ||
| fn timer(&self) -> Option<EffectTimer> { | ||
| let self_duration = self.timer.duration(); | ||
| let inner_duration = self.inner.timer().unwrap_or_default().duration(); | ||
|
|
||
| Some(EffectTimer::new(self_duration + inner_duration, Linear)) | ||
| } | ||
|
|
||
| fn cell_selection(&self) -> Option<CellFilter> { | ||
| self.inner.cell_selection() | ||
| } | ||
|
|
||
| fn as_effect_span(&self, offset: Duration) -> EffectSpan { | ||
| let inner_offset = match self.position { | ||
| ProlongPosition::Start => offset + self.inner.timer().unwrap_or_default().duration(), | ||
| ProlongPosition::End => offset | ||
| }; | ||
| EffectSpan::new(self, offset, vec![self.inner.as_effect_span(inner_offset)]) | ||
| } | ||
|
|
||
| fn reset(&mut self) { | ||
| self.timer.reset(); | ||
| self.inner.reset(); | ||
| } | ||
| } |
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