decorations: Port decorcations to 0.2.0 (#259)

Fixes `brace` and `flat-brace` to use the new 0.2.0 API.

src/draw/shapes.typ

@@ -648,7 +648,7 @@
         let r = process.element(ctx, element)
         if r != none {
           ctx = r.ctx
-          if segments != () {
+          if segments != () and r.drawables != () {
             assert.eq(r.drawables.first().type, "path")
             let start = path-util.segment-end(segments.last())
             let end = path-util.segment-start(r.drawables.first().segments.first())
@@ -696,4 +696,4 @@
       drawables: drawables
     )
   },)
-}
+}

src/drawable.typ

@@ -226,4 +226,4 @@
   } else if symbol == "o" {
     circle()
   }
-}
+}

src/lib/decorations.typ

@@ -2,6 +2,8 @@
 #import "../matrix.typ"
 #import "../util.typ"
 #import "../draw.typ": *
+#import "../coordinate.typ"
+#import "../styles.typ"
 
 /// Rotates the vector 'ab' around 'a' and scales it to 'len', returns the absolute point 'c'.
 #let _rotate-around(a, b, angle: 90deg, len: auto) = {
@@ -276,8 +278,7 @@
 
     // all the following code assumes the brace to start at (0, 0), growing to the right,
     // pointing upwards, so we set the origin and rotate the entire group accordingly
-    let start = coordinate.resolve(ctx, start)
-    let end = coordinate.resolve(ctx, end)
+    let (_, start, end) = coordinate.resolve(ctx, start, end)
     set-origin(start)
     rotate(vector.angle2(start, end))
 

src/util.typ

@@ -188,17 +188,8 @@
 // Measure content in canvas coordinates
 #let measure(ctx, cnt) = {
   let size = typst-measure(cnt, ctx.typst-style)
-
-  // Transformation matrix:
-  // sx .. .. .
-  // .. sy .. .
-  // .. .. sz .
-  // .. .. .. 1
-  // let sx = ctx.transform.at(0).at(0)
-  // let sy = ctx.transform.at(1).at(1)
-
   return (
     calc.abs(size.width / ctx.length),
     calc.abs(size.height / ctx.length)
   )
-}
+}

tests/decorations/test.typ

@@ -1,5 +1,5 @@
 #set page(width: auto, height: auto)
-#import "../../src/lib.typ": *
+#import "/src/lib.typ": *
 
 #box(stroke: 2pt + red, canvas({
   decorations.brace((0, -0), (3, -0))