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'and then not have to worry about layout, ever'
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parent
21741ebc52
commit
f7e6449324
8 changed files with 74 additions and 74 deletions
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@ -22,27 +22,32 @@ pub trait Content<E: Engine>: Send + Sync {
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fn content (&self) -> impl Content<E> {
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()
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}
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fn area (&self, area: E::Area) -> E::Area {
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self.content().area(area)
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fn layout (&self, area: E::Area) -> E::Area {
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self.content().layout(area)
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}
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fn render (&self, output: &mut E::Output) {
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self.content().render(output)
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output.place(self.layout(output.area()), &self.content())
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}
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}
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/// The platonic ideal item of content: emptiness at dead center.
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impl<E: Engine> Content<E> for () {
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fn area (&self, _: E::Area) -> E::Area {
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[0.into(), 0.into(), 0.into(), 0.into()].into()
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fn layout (&self, area: E::Area) -> E::Area {
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let [x, y, w, h] = area.xywh();
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let x = x + w / 2.into();
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let y = y + h / 2.into();
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[x, y, 0.into(), 0.into()].into()
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}
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fn render (&self, _: &mut E::Output) {
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}
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fn render (&self, _: &mut E::Output) {}
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}
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impl<E: Engine, T: Content<E>> Content<E> for &T {
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fn content (&self) -> impl Content<E> {
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(*self).content()
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}
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fn area (&self, area: E::Area) -> E::Area {
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(*self).area(area)
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fn layout (&self, area: E::Area) -> E::Area {
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(*self).layout(area)
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}
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fn render (&self, output: &mut E::Output) {
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(*self).render(output)
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@ -54,9 +59,9 @@ impl<E: Engine, T: Content<E>> Content<E> for Option<T> {
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self.as_ref()
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.map(|content|content.content())
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}
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fn area (&self, area: E::Area) -> E::Area {
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fn layout (&self, area: E::Area) -> E::Area {
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self.as_ref()
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.map(|content|content.area(area))
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.map(|content|content.layout(area))
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.unwrap_or([0.into(), 0.into(), 0.into(), 0.into(),].into())
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}
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fn render (&self, output: &mut E::Output) {
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