diff options
Diffstat (limited to 'src/library/placed.rs')
| -rw-r--r-- | src/library/placed.rs | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/src/library/placed.rs b/src/library/placed.rs deleted file mode 100644 index cee687fa..00000000 --- a/src/library/placed.rs +++ /dev/null @@ -1,67 +0,0 @@ -//! Absolute placement of nodes. - -use super::prelude::*; -use super::AlignNode; - -/// Place content at an absolute position. -#[derive(Debug, Hash)] -pub struct PlaceNode(pub PackedNode); - -#[class] -impl PlaceNode { - fn construct(_: &mut EvalContext, args: &mut Args) -> TypResult<Node> { - let aligns = args.find().unwrap_or(Spec::with_x(Some(Align::Left))); - let tx = args.named("dx")?.unwrap_or_default(); - let ty = args.named("dy")?.unwrap_or_default(); - let body: PackedNode = args.expect("body")?; - Ok(Node::block(Self( - body.moved(Point::new(tx, ty)).aligned(aligns), - ))) - } -} - -impl Layout for PlaceNode { - fn layout( - &self, - ctx: &mut LayoutContext, - regions: &Regions, - styles: StyleChain, - ) -> Vec<Constrained<Rc<Frame>>> { - let out_of_flow = self.out_of_flow(); - - // The pod is the base area of the region because for absolute - // placement we don't really care about the already used area (current). - let pod = { - let finite = regions.base.map(Length::is_finite); - let expand = finite & (regions.expand | out_of_flow); - Regions::one(regions.base, regions.base, expand) - }; - - let mut frames = self.0.layout(ctx, &pod, styles); - let Constrained { item: frame, cts } = &mut frames[0]; - - // If expansion is off, zero all sizes so that we don't take up any - // space in our parent. Otherwise, respect the expand settings. - let target = regions.expand.select(regions.current, Size::zero()); - Rc::make_mut(frame).resize(target, Align::LEFT_TOP); - - // Set base constraint because our pod size is base and exact - // constraints if we needed to expand or offset. - *cts = Constraints::new(regions.expand); - cts.base = regions.base.map(Some); - cts.exact = regions.current.filter(regions.expand | out_of_flow); - - frames - } -} - -impl PlaceNode { - /// Whether this node wants to be placed relative to its its parent's base - /// origin. instead of relative to the parent's current flow/cursor - /// position. - pub fn out_of_flow(&self) -> bool { - self.0 - .downcast::<AlignNode>() - .map_or(false, |node| node.aligns.y.is_some()) - } -} |
