Nested Element Access

CHANGES.md

@@ -22,6 +22,7 @@ CeTZ 0.2.0 requires Typst 0.10.0
 - Added `radius` style to `rect` for drawing rounded rects
 - Added `hide` function for hiding elements
 - Added distance, ratio and angle anchors to elements
+- Added nested element access via dot separated paths
 
 ### Plot
 - Added `plot.add-contour(..)` for plotting contour plots

src/coordinate.typ

@@ -55,14 +55,18 @@
 
 #let resolve-anchor(ctx, c) = {
   // (name: <string>, anchor: <number, angle, string> or <none>)
-  // "name.anchor"
+  // "{name.}name.anchor"
   // "name"
   let (name, anchor) = if type(c) == str {
     let parts = c.split(".")
     if parts.len() == 1 {
       (parts.first(), "default")
     } else {
-      (parts.slice(0, -1).join("."), parts.last())
+      if parts.join(".") in ctx.nodes {
+        (parts.join("."), "default")
+      } else {
+        (parts.slice(0, -1).join("."), parts.last())
+      }
     }
   } else {
     (c.name, c.at("anchor", default: "default"))

src/draw/grouping.typ

@@ -207,9 +207,19 @@
     let bounds = none
     let drawables = ()
     let group-ctx = ctx
-    group-ctx.groups.push((anchors: (:)))
+    group-ctx.groups.push((anchors: (:), nodes: (:)))
     (ctx: group-ctx, drawables, bounds) = process.many(group-ctx, if type(body) == function {body(ctx)} else {body})
 
+    // Append group elements to context
+    if name != none {
+      for (elem-name, elem) in group-ctx.groups.last().nodes {
+        ctx.nodes.insert(name + "." + elem-name, elem)
+        if ctx.groups != () {
+          ctx.groups.last().nodes.insert(name + "." + elem-name, elem)
+        }
+      }
+    }
+
     // Apply bounds padding
     let bounds = if bounds != none {
       let padding = util.as-padding-dict(style.padding)

src/lib/plot/legend.typ

@@ -115,7 +115,7 @@
   }
 
   draw.on-layer(style.layer, {
-    draw.group(name: "legend", padding: style.padding, ctx => {
+    draw.group(name: "legend-container", padding: style.padding, ctx => {
       import draw: *
 
       set-origin(position)
@@ -173,7 +173,7 @@
 
   // Fill legend background
   draw.on-layer(style.layer - .5, {
-    draw.rect("legend.south-west",
-              "legend.north-east", fill: style.fill, stroke: style.stroke, radius: style.radius)
+    draw.rect("legend-container.south-west",
+              "legend-container.north-east", fill: style.fill, stroke: style.stroke, radius: style.radius)
   })
 }

src/process.typ

@@ -30,6 +30,9 @@
   }
   if "name" in element and type(element.name) == "string" and "anchors" in element {
     ctx.nodes.insert(element.name, element)
+    if ctx.groups != () {
+      ctx.groups.last().nodes.insert(element.name, element)
+    }
   }
 
   if ctx.debug and bounds != none {

tests/group/nested-element/test.typ

@@ -0,0 +1,18 @@
+#set page(width: auto, height: auto)
+#import "/src/lib.typ": *
+
+#box(stroke: 2pt + red, canvas({
+  import draw: *
+
+  group(name: "parent", {
+    content((0,0), [Content], name: "content")
+    group(name: "child", {
+      circle((1,-2), fill: blue, name: "circle")
+    })
+  })
+
+  rect("parent.content.south-west",
+       "parent.content.north-east", stroke: green)
+  rect((name: "parent.child.circle", anchor: -45deg),
+       (name: "parent.child.circle", anchor: +135deg), stroke: green)
+}))