Merge pr/630: Tools: the Pen continues an open path from either end point (#630)

# Conflicts:
#	ROADMAP.md
#	crates/engine/src/cmd/object.rs
#	crates/tools/src/lib.rs
#	crates/tools/src/pen.rs
#	crates/tools/src/tests.rs
#	crates/ui-egui/src/canvas.rs
#	crates/ui-egui/src/i18n.rs
#	crates/ui-egui/src/i18n/ar.rs
#	crates/ui-egui/src/i18n/it.rs
#	crates/ui-egui/src/i18n/ja.rs
#	crates/ui-egui/src/i18n/pt_br.rs
#	crates/ui-egui/src/i18n/uk.rs

ROADMAP.md

@@ -128,6 +128,7 @@ list) · [roadmap.md](docs/roadmap.md) (milestones, plan) · [parity-checklist.m
 
 Newest first.
 
+- **2026-10-12** · The Pen tool continues an open path from either end point, as in InDesign: the cursor shows it over an end point, a click there carries on drawing that path, a drag first reshapes the end point's direction lines, and the other end closes it. Object › Paths › Reverse Path (`path.reverse`); `path.setAnchor`; `path.appendAnchor` and `path.close` take a subpath. No readiness percentage change.
 - **2026-10-12** · The Eyedropper puts a colour sampled from an image on the stroke when the toolbox's Stroke box is in front, as in InDesign (a line takes it on its stroke). No readiness percentage change.
 - **2026-10-12** · Window close and application/menu Quit ask about unsaved documents; later Cancel keeps every tab open, including earlier Don't Save choices. Approvals are rechecked after edits. Cancelable macOS Dock Quit remains open (#544). No readiness percentage change.
 - **2026-10-12** · Each running app keeps recovery data in its own locked folder; current folder and lock ownership are checked before writes and cleanup. Failed isolation disables recovery with a warning instead of sharing document IDs. No readiness percentage change.

crates/engine/src/cmd/object.rs

@@ -595,8 +595,34 @@ pub fn specs() -> Vec<CommandSpec> {
             step_and_repeat
         ),
         cmd!("path.create", "Create Path", [], None, "{spread?, anchors: [{p:[x,y], in?:[x,y], out?:[x,y]}], closed?: bool}", has_doc, path_create),
-        cmd!("path.appendAnchor", "Add Anchor", [], None, "{id, anchor: {p, in?, out?}} (spread coords)", has_doc, path_append),
-        cmd!("path.close", "Close Path", ["Object", "Paths"], None, "{id}", has_doc, path_close),
+        cmd!(
+            "path.appendAnchor",
+            "Add Anchor",
+            [],
+            None,
+            "{id, anchor: {p, in?, out?} (spread coords), subpath?: index (default the last)} — after the subpath's last anchor",
+            has_doc,
+            path_append
+        ),
+        cmd!(
+            "path.setAnchor",
+            "Set Anchor",
+            [],
+            None,
+            "{id, subpath?: index (default the last), anchor: index|\"first\"|\"last\", p?, in?, out? (spread coords)} — moves an anchor or its direction lines; with both lines given and collinear it becomes smooth",
+            has_doc,
+            path_set_anchor
+        ),
+        cmd!(
+            "path.reverse",
+            "Reverse Path",
+            ["Object", "Paths"],
+            None,
+            "{ids?, subpath?: index (only that subpath of the first target)} — the anchors run the other way (the end point becomes the start)",
+            has_selection,
+            path_reverse
+        ),
+        cmd!("path.close", "Close Path", ["Object", "Paths"], None, "{id, subpath?: index (default every subpath)}", has_doc, path_close),
         cmd!("path.moveAnchors", "Move Anchors", [], None, "{id, anchors: [[subpath, index]], dx, dy, handle?: in|out}", has_doc, path_move_anchors),
         cmd!(
             "object.align",
@@ -2687,11 +2713,20 @@ fn path_create(s: &mut Session, p: &Value) -> Result<Value> {
 fn path_append(s: &mut Session, p: &Value) -> Result<Value> {
     let id = super::id_param(p, "id").ok_or_else(|| bad("path.appendAnchor", "missing id"))?;
     let a = p.get("anchor").and_then(anchor_from).ok_or_else(|| bad("path.appendAnchor", "missing anchor"))?;
+    let subpath = p.get("subpath").and_then(Value::as_u64);
     s.edit(|d, _| {
         let loc = d.find(id).ok_or(designcraft_doc::DocError::NoItem(id))?;
         let inv = (d.parent_xf(&loc) * d.item_at(&loc).map(|i| i.xf).unwrap_or_default()).inverse();
         let it = d.item_mut(id).ok_or(designcraft_doc::DocError::NoItem(id))?;
-        let sp = it.path.subpaths.last_mut().ok_or_else(|| bad("path.appendAnchor", "empty path"))?;
+        let sp = match subpath {
+            Some(i) => {
+                usize::try_from(i).ok().and_then(|i| it.path.subpaths.get_mut(i)).ok_or_else(|| bad("path.appendAnchor", "no such subpath"))?
+            }
+            None => it.path.subpaths.last_mut().ok_or_else(|| bad("path.appendAnchor", "empty path"))?,
+        };
+        if sp.closed {
+            return Err(bad("path.appendAnchor", "the subpath is closed"));
+        }
         sp.anchors.push(a.transform(inv));
         if it.shape == Shape::GraphicLine {
             it.shape = Shape::Path;
@@ -2700,12 +2735,103 @@ fn path_append(s: &mut Session, p: &Value) -> Result<Value> {
     })
 }
 
+fn path_set_anchor(s: &mut Session, p: &Value) -> Result<Value> {
+    const ID: &str = "path.setAnchor";
+    let id = super::id_param(p, "id").ok_or_else(|| bad(ID, "missing id"))?;
+    let pt = |k: &str| -> Option<Point> {
+        let a = p.get(k)?.as_array()?;
+        let q = Point::new(a.first()?.as_f64()?, a.get(1)?.as_f64()?);
+        (q.x.is_finite() && q.y.is_finite()).then_some(q)
+    };
+    let (new_p, new_in, new_out) = (pt("p"), pt("in"), pt("out"));
+    if new_p.is_none() && new_in.is_none() && new_out.is_none() {
+        return Err(bad(ID, "give p, in or out"));
+    }
+    let subpath = p.get("subpath").and_then(Value::as_u64);
+    let which = p.get("anchor").cloned().unwrap_or(Value::Null);
+    s.edit(|d, _| {
+        let loc = d.find(id).ok_or(designcraft_doc::DocError::NoItem(id))?;
+        let inv = (d.parent_xf(&loc) * d.item_at(&loc).map(|i| i.xf).unwrap_or_default()).inverse();
+        let it = d.item_mut(id).ok_or(designcraft_doc::DocError::NoItem(id))?;
+        if it.locked {
+            return Err(bad(ID, "the path is locked"));
+        }
+        let sp = match subpath {
+            Some(i) => usize::try_from(i).ok().and_then(|i| it.path.subpaths.get_mut(i)),
+            None => it.path.subpaths.last_mut(),
+        }
+        .ok_or_else(|| bad(ID, "no such subpath"))?;
+        let n = sp.anchors.len();
+        let ai = match &which {
+            Value::String(w) if w == "first" => 0,
+            Value::String(w) if w == "last" => n.saturating_sub(1),
+            v => v.as_u64().and_then(|i| usize::try_from(i).ok()).ok_or_else(|| bad(ID, "anchor: an index, \"first\" or \"last\""))?,
+        };
+        let a = sp.anchors.get_mut(ai).ok_or_else(|| bad(ID, "no such anchor"))?;
+        if let Some(q) = new_p {
+            let v = inv * q - a.p;
+            a.p += v;
+            a.h_in += v;
+            a.h_out += v;
+        }
+        if let Some(q) = new_in {
+            a.h_in = inv * q;
+        }
+        if let Some(q) = new_out {
+            a.h_out = inv * q;
+        }
+        if new_in.is_some() && new_out.is_some() {
+            let (i, o) = (a.h_in - a.p, a.h_out - a.p);
+            let collinear = (i.x * o.y - i.y * o.x).abs() <= 1e-6 * i.hypot().max(1.0) * o.hypot().max(1.0) && i.dot(o) <= 0.0;
+            a.kind = if collinear { designcraft_geom::AnchorKind::Smooth } else { designcraft_geom::AnchorKind::Corner };
+        }
+        ok()
+    })
+}
+
+fn path_reverse(s: &mut Session, p: &Value) -> Result<Value> {
+    let ids = targets(s, p)?;
+    let only = p.get("subpath").and_then(Value::as_u64).map(|i| usize::try_from(i).unwrap_or(usize::MAX));
+    if let (Some(i), Some(id)) = (only, ids.first())
+        && s.doc()?.doc.item(*id).is_none_or(|it| it.path.subpaths.get(i).is_none())
+    {
+        return Err(bad("path.reverse", "no such subpath"));
+    }
+    let ids = if only.is_some() { ids.into_iter().take(1).collect() } else { ids };
+    s.edit(|d, _| {
+        let mut reversed = 0;
+        for id in &ids {
+            let Some(it) = d.item_mut(*id) else { continue };
+            if it.locked || it.is_group() {
+                continue;
+            }
+            for (i, sp) in it.path.subpaths.iter_mut().enumerate() {
+                if only.is_some_and(|o| o != i) {
+                    continue;
+                }
+                sp.anchors.reverse();
+                for a in &mut sp.anchors {
+                    std::mem::swap(&mut a.h_in, &mut a.h_out);
+                }
+            }
+            reversed += 1;
+        }
+        Ok(json!({"reversed": reversed}))
+    })
+}
+
 fn path_close(s: &mut Session, p: &Value) -> Result<Value> {
     let id = super::id_param(p, "id").ok_or_else(|| bad("path.close", "missing id"))?;
+    let only = p.get("subpath").and_then(Value::as_u64).map(|i| usize::try_from(i).unwrap_or(usize::MAX));
     s.edit(|d, _| {
         let it = d.item_mut(id).ok_or(designcraft_doc::DocError::NoItem(id))?;
-        for sp in &mut it.path.subpaths {
-            sp.closed = true;
+        if only.is_some_and(|i| i >= it.path.subpaths.len()) {
+            return Err(bad("path.close", "no such subpath"));
+        }
+        for (i, sp) in it.path.subpaths.iter_mut().enumerate() {
+            if only.is_none_or(|o| o == i) {
+                sp.closed = true;
+            }
         }
         if it.shape == Shape::GraphicLine {
             it.shape = Shape::Path;
@@ -4213,3 +4339,61 @@ mod spread_target_tests {
         assert!(s.doc().unwrap().doc.spreads[0].items.is_empty());
     }
 }
+
+#[cfg(test)]
+mod path_edit_tests {
+    use designcraft_doc::ItemId;
+    use designcraft_geom::Point;
+    use serde_json::json;
+
+    fn session_with_path() -> (crate::Session, u64) {
+        let mut s = crate::Session::new();
+        s.execute("file.new", &json!({})).unwrap();
+        let id = s
+            .execute(
+                "path.create",
+                &json!({"anchors": [{"p": [100, 100]}, {"p": [200, 100], "in": [170, 80], "out": [230, 120]}, {"p": [300, 200]}]}),
+            )
+            .unwrap()["id"]
+            .as_u64()
+            .unwrap();
+        (s, id)
+    }
+
+    fn anchors(s: &crate::Session, id: u64) -> Vec<designcraft_geom::Anchor> {
+        let d = &s.doc().unwrap().doc;
+        let it = d.item(ItemId(id)).unwrap();
+        let xf = d.parent_xf(&d.find(ItemId(id)).unwrap()) * it.xf;
+        it.path.subpaths[0].anchors.iter().map(|a| a.transform(xf)).collect()
+    }
+
+    #[test]
+    fn reverse_path_swaps_ends_and_direction_lines() {
+        let (mut s, id) = session_with_path();
+        s.execute("path.reverse", &json!({"ids": [id]})).unwrap();
+        let a = anchors(&s, id);
+        assert_eq!(a.iter().map(|a| a.p).collect::<Vec<_>>(), [Point::new(300.0, 200.0), Point::new(200.0, 100.0), Point::new(100.0, 100.0)]);
+        assert_eq!((a[1].h_in, a[1].h_out), (Point::new(230.0, 120.0), Point::new(170.0, 80.0)));
+        assert!(s.execute("path.reverse", &json!({"ids": [id], "subpath": 3})).is_err());
+    }
+
+    #[test]
+    fn anchors_go_on_the_named_open_subpath_and_set_anchor_reshapes_one() {
+        let (mut s, id) = session_with_path();
+        s.execute("path.appendAnchor", &json!({"id": id, "subpath": 0, "anchor": {"p": [400, 250]}})).unwrap();
+        assert_eq!(anchors(&s, id).last().unwrap().p, Point::new(400.0, 250.0));
+        assert!(s.execute("path.appendAnchor", &json!({"id": id, "subpath": 1, "anchor": {"p": [0, 0]}})).is_err());
+        // Direction lines on the last anchor: collinear and opposite make it smooth.
+        s.execute("path.setAnchor", &json!({"id": id, "anchor": "last", "in": [380, 230], "out": [420, 270]})).unwrap();
+        let last = *anchors(&s, id).last().unwrap();
+        assert_eq!((last.h_in, last.h_out, last.kind), (Point::new(380.0, 230.0), Point::new(420.0, 270.0), designcraft_geom::AnchorKind::Smooth));
+        s.execute("path.setAnchor", &json!({"id": id, "anchor": 0, "p": [90, 110]})).unwrap();
+        assert_eq!(anchors(&s, id)[0].p, Point::new(90.0, 110.0));
+        assert!(s.execute("path.setAnchor", &json!({"id": id, "anchor": 9, "p": [0, 0]})).is_err());
+        assert!(s.execute("path.setAnchor", &json!({"id": id, "anchor": "last"})).is_err(), "nothing to set");
+        // Closing one subpath; then it takes no more anchors.
+        s.execute("path.close", &json!({"id": id, "subpath": 0})).unwrap();
+        assert!(s.execute("path.appendAnchor", &json!({"id": id, "anchor": {"p": [0, 0]}})).is_err());
+        assert!(s.execute("path.close", &json!({"id": id, "subpath": 4})).is_err());
+    }
+}

crates/tools/src/lib.rs

@@ -369,6 +369,8 @@ pub enum Cursor {
     PenClose,
     /// Convert Direction Point.
     PenConvert,
+    /// The Pen over an open path's end point: a click continues the path.
+    PenContinue,
     Text,
     Hand,
     HandGrab,

crates/tools/src/pen.rs

@@ -1,7 +1,8 @@
 //! Pen tool (P): click for corner points, drag for smooth points, click the first point to close,
 //! Enter/Esc (or switching tools) to finish an open path. Each anchor is its own undo step, as in
 //! InDesign. Between paths, a click on a selected path's anchor deletes it and a click on its
-//! outline adds an anchor; the cursor shows which.
+//! outline adds an anchor; clicking an end point of an open path continues that path from there
+//! (dragging from it first reshapes its direction lines). The cursor shows which.
 
 use designcraft_doc::{ItemId, SpreadRef};
 use designcraft_geom::{BezPath, Point};
@@ -22,6 +23,45 @@ pub struct PenTool {
     hover: Point,
     /// Smart guides in canvas coordinates, as `snap_point` returned them.
     guides: Vec<Overlay>,
+    /// Continuing an existing path: the subpath the new anchors go on.
+    subpath: Option<usize>,
+    /// The press was on the continued path's end point: a drag reshapes its direction lines
+    /// instead of adding an anchor.
+    editing_end: bool,
+    /// The press on the end point has been dragged.
+    end_moved: bool,
+}
+
+/// An end point of an open path under canvas point `p`: (item, subpath, whether it is the last
+/// anchor). The selection is checked first, then the frontmost item under the pointer.
+fn endpoint_at(cx: &ToolContext, p: Point) -> Option<(ItemId, usize, bool)> {
+    let tol = cx.tol(6.0);
+    let mut ids = cx.selection.items.clone();
+    if let Some((_, id)) = cx.hit(p)
+        && !ids.contains(&id)
+    {
+        ids.push(id);
+    }
+    for id in ids {
+        let Some(it) = cx.doc.item(id) else { continue };
+        if it.locked || it.is_group() || !matches!(it.content, designcraft_doc::Content::Unassigned) {
+            continue;
+        }
+        let Some(xf) = cx.item_canvas_xf(id).map(|m| m * it.xf) else { continue };
+        for (si, sp) in it.path.subpaths.iter().enumerate() {
+            if sp.closed {
+                continue;
+            }
+            let (Some(first), Some(last)) = (sp.anchors.first(), sp.anchors.last()) else { continue };
+            if (xf * last.p - p).hypot() <= tol {
+                return Some((id, si, true));
+            }
+            if (xf * first.p - p).hypot() <= tol {
+                return Some((id, si, false));
+            }
+        }
+    }
+    None
 }
 
 fn anchor_json(a: &(Point, Point, Point)) -> Value {
@@ -38,6 +78,8 @@ enum Hover {
     Delete(u64, usize, usize),
     /// Add an anchor on a selected path's outline.
     Add(ItemId),
+    /// Continue subpath `.1` of open path `.0` from its last (`.2`) or first anchor.
+    Continue(ItemId, usize, bool),
 }
 
 impl PenTool {
@@ -55,6 +97,9 @@ impl PenTool {
         if !self.anchors.is_empty() {
             return Hover::Place;
         }
+        if let Some((id, si, at_end)) = endpoint_at(cx, p) {
+            return Hover::Continue(id, si, at_end);
+        }
         let ids = &cx.selection.items;
         if let Some((id, si, ai, None)) = anchor_at_in(cx, ids, p) {
             return Hover::Delete(id, si, ai);
@@ -68,9 +113,35 @@ impl PenTool {
         self.anchors.clear();
         self.dragging = false;
         self.guides.clear();
+        self.subpath = None;
+        self.editing_end = false;
+        self.end_moved = false;
         vec![]
     }
 
+    /// Start continuing subpath `si` of `id` from its last (`at_end`) or first anchor: the anchors
+    /// so far are its other end and the end point, in spread coordinates.
+    fn continue_from(&mut self, cx: &ToolContext, id: ItemId, si: usize, at_end: bool) -> Vec<Action> {
+        let (Some(it), Some(loc)) = (cx.doc.item(id), cx.doc.find(id)) else { return vec![] };
+        let Some(sp) = it.path.subpaths.get(si) else { return vec![] };
+        let (Some(first), Some(last)) = (sp.anchors.first(), sp.anchors.last()) else { return vec![] };
+        let xf = cx.doc.parent_xf(&loc) * it.xf;
+        let at = |a: &designcraft_geom::Anchor, flip: bool| {
+            let (i, o) = if flip { (a.h_out, a.h_in) } else { (a.h_in, a.h_out) };
+            (xf * a.p, xf * i, xf * o)
+        };
+        // From the first anchor the path is reversed first, so the new anchors follow on.
+        let (other, end) = if at_end { (at(first, false), at(last, false)) } else { (at(last, true), at(first, true)) };
+        self.path = Some(id.0);
+        self.subpath = Some(si);
+        self.spread = Some(loc.spread);
+        self.anchors = vec![other, end];
+        self.editing_end = true;
+        self.end_moved = false;
+        self.dragging = true;
+        if at_end { vec![] } else { vec![Action::Exec("path.reverse".into(), json!({"ids": [id.0], "subpath": si}))] }
+    }
+
     /// Shift constrains first. The stored point is the snapped spread point. Guides are already canvas.
     fn snap_click(&mut self, cx: &ToolContext, spread: SpreadRef, mut p: Point, shift: bool) -> Point {
         if shift && let Some(last) = self.anchors.last() {
@@ -89,7 +160,13 @@ impl PenTool {
                 let anchors: Vec<Value> = self.anchors.iter().map(anchor_json).collect();
                 vec![Action::Exec("path.create".into(), json!({"spread": spread_json(sr), "anchors": anchors, "closed": false, "notifyPen": true}))]
             }
-            Some(id) => vec![Action::Exec("path.appendAnchor".into(), json!({"id": id, "anchor": anchor_json(last)}))],
+            Some(id) => {
+                let mut p = json!({"id": id, "anchor": anchor_json(last)});
+                if let Some(si) = self.subpath {
+                    p["subpath"] = json!(si);
+                }
+                vec![Action::Exec("path.appendAnchor".into(), p)]
+            }
             None => vec![],
         }
     }
@@ -126,12 +203,19 @@ impl Tool for PenTool {
                 match self.hover_at(cx, ev.pos) {
                     Hover::Close => {
                         let out = match self.path {
-                            Some(id) => vec![Action::Exec("path.close".into(), json!({"id": id}))],
+                            Some(id) => {
+                                let mut p = json!({"id": id});
+                                if let Some(si) = self.subpath {
+                                    p["subpath"] = json!(si);
+                                }
+                                vec![Action::Exec("path.close".into(), p)]
+                            }
                             None => vec![],
                         };
                         self.finish();
                         return out;
                     }
+                    Hover::Continue(id, si, at_end) => return self.continue_from(cx, id, si, at_end),
                     Hover::Delete(id, si, ai) => {
                         return vec![Action::Exec("path.deleteAnchor".into(), json!({"id": id, "subpath": si, "anchor": ai}))];
                     }
@@ -149,6 +233,7 @@ impl Tool for PenTool {
                 vec![]
             }
             PointerKind::Drag => {
+                self.end_moved |= self.editing_end;
                 if let Some(a) = self.anchors.last_mut() {
                     // Smooth point: out handle follows the pointer, in handle mirrors it.
                     a.2 = sp;
@@ -161,6 +246,17 @@ impl Tool for PenTool {
                     return vec![];
                 }
                 self.dragging = false;
+                // The continued path's end point: a drag set its direction lines.
+                if std::mem::take(&mut self.editing_end) {
+                    let (Some(id), Some(si), Some(&(p, h_in, h_out))) = (self.path, self.subpath, self.anchors.last()) else { return vec![] };
+                    if !std::mem::take(&mut self.end_moved) || (h_out - p).hypot() < 1e-9 {
+                        return vec![];
+                    }
+                    return vec![Action::Exec(
+                        "path.setAnchor".into(),
+                        json!({"id": id, "subpath": si, "anchor": "last", "in": [h_in.x, h_in.y], "out": [h_out.x, h_out.y]}),
+                    )];
+                }
                 self.commit_anchor()
             }
             _ => vec![],
@@ -210,6 +306,7 @@ impl Tool for PenTool {
         match self.hover_at(cx, p) {
             Hover::Place => Cursor::Pen,
             Hover::Close => Cursor::PenClose,
+            Hover::Continue(..) => Cursor::PenContinue,
             Hover::Delete(..) => Cursor::PenDelete,
             Hover::Add(_) => Cursor::PenAdd,
         }

crates/tools/src/tests.rs

@@ -1520,3 +1520,62 @@ fn fitting_handle_axes_follow_spread_and_frame_rotation() {
         }
     }
 }
+
+#[test]
+fn pen_continues_an_open_path_from_either_end_point() {
+    let mut d = Document::new(&NewDocument::default());
+    let lid = d.default_layer();
+    let id = ItemId(d.alloc());
+    let anchors = vec![
+        designcraft_geom::Anchor::corner(Point::new(100.0, 100.0)),
+        designcraft_geom::Anchor {
+            p: Point::new(200.0, 100.0),
+            h_in: Point::new(170.0, 80.0),
+            h_out: Point::new(230.0, 120.0),
+            kind: designcraft_geom::AnchorKind::Smooth,
+        },
+    ];
+    let mut it = Item::new(id, lid, Shape::Path, designcraft_geom::PathData::single(designcraft_geom::SubPath::new(anchors, false)));
+    it.stroke = Stroke::default();
+    d.insert_item(SpreadRef::Doc(0), it, None).unwrap();
+    let (s, c, l) = (Selection::default(), Cache::new(), CanvasLayout::new(&d, false));
+    let cx = ctx(&d, &s, &c, &l);
+    let off = l.xf(SpreadRef::Doc(0)).translation();
+    let at = |x: f64, y: f64| (x + off.x, y + off.y);
+    let ev = |k: PointerKind, (x, y): (f64, f64)| PointerEvent::new(k, x, y);
+    let mut t = create("pen");
+    // The cursor says the end point continues the path; elsewhere it's the plain pen.
+    assert_eq!(t.cursor(&cx, Point::new(at(200.0, 100.0).0, at(200.0, 100.0).1), Mods::default()), Cursor::PenContinue);
+    assert_eq!(t.cursor(&cx, Point::new(at(150.0, 300.0).0, at(150.0, 300.0).1), Mods::default()), Cursor::Pen);
+    // Clicking the last anchor adds nothing yet; the next click appends to that path.
+    assert!(t.pointer(&cx, &ev(PointerKind::Down, at(200.0, 100.0))).is_empty());
+    assert!(t.pointer(&cx, &ev(PointerKind::Up, at(200.0, 100.0))).is_empty(), "a click on the end point changes nothing");
+    t.pointer(&cx, &ev(PointerKind::Down, at(300.0, 200.0)));
+    let a = t.pointer(&cx, &ev(PointerKind::Up, at(300.0, 200.0)));
+    let [Action::Exec(cmd, p)] = a.as_slice() else { panic!("{a:?}") };
+    assert_eq!((cmd.as_str(), p["id"].as_u64(), p["subpath"].as_u64()), ("path.appendAnchor", Some(id.0), Some(0)));
+    assert_eq!((p["anchor"]["p"][0].as_f64(), p["anchor"]["p"][1].as_f64()), (Some(300.0), Some(200.0)));
+    // Clicking the first anchor of the other end closes it.
+    let a = t.pointer(&cx, &ev(PointerKind::Down, at(100.0, 100.0)));
+    assert_eq!(a, vec![Action::Exec("path.close".into(), serde_json::json!({"id": id.0, "subpath": 0}))]);
+    assert!(t.pointer(&cx, &ev(PointerKind::Up, at(100.0, 100.0))).is_empty());
+    // From the first anchor, the path is reversed first; a drag there sets its direction lines.
+    let mut t = create("pen");
+    let a = t.pointer(&cx, &ev(PointerKind::Down, at(100.0, 100.0)));
+    assert_eq!(a, vec![Action::Exec("path.reverse".into(), serde_json::json!({"ids": [id.0], "subpath": 0}))]);
+    t.pointer(&cx, &ev(PointerKind::Drag, at(80.0, 140.0)));
+    let a = t.pointer(&cx, &ev(PointerKind::Up, at(80.0, 140.0)));
+    assert_eq!(
+        a,
+        vec![Action::Exec(
+            "path.setAnchor".into(),
+            serde_json::json!({"id": id.0, "subpath": 0, "anchor": "last", "in": [120.0, 60.0], "out": [80.0, 140.0]})
+        )]
+    );
+    // Closed paths and locked paths aren't continued.
+    let mut d2 = d.clone();
+    d2.item_mut(id).unwrap().locked = true;
+    let cx = ctx(&d2, &s, &c, &l);
+    let t = create("pen");
+    assert_eq!(t.cursor(&cx, Point::new(at(200.0, 100.0).0, at(200.0, 100.0).1), Mods::default()), Cursor::Pen);
+}

crates/ui-egui/src/cursors.rs

@@ -96,6 +96,7 @@ enum Badge {
     Delete,
     Close,
     Convert,
+    Continue,
 }
 
 /// The pen nib, tip at `o` (top left), with a badge below right.
@@ -121,6 +122,7 @@ fn pen(ink: &mut Ink, o: Pos2, badge: Badge) {
             ink.line(b + vec2(0.0, 6.0), b + vec2(3.0, 0.0));
             ink.line(b + vec2(3.0, 0.0), b + vec2(6.0, 6.0));
         }
+        Badge::Continue => ink.line(b + vec2(1.0, 6.0), b + vec2(5.0, 0.0)),
     }
 }
 
@@ -152,6 +154,7 @@ fn glyph(c: Cursor, p: Pos2) -> Option<Vec<Shape>> {
         Cursor::PenDelete => pen(&mut ink, p, Badge::Delete),
         Cursor::PenClose => pen(&mut ink, p, Badge::Close),
         Cursor::PenConvert => pen(&mut ink, p, Badge::Convert),
+        Cursor::PenContinue => pen(&mut ink, p, Badge::Continue),
         Cursor::Rotate => rotate(&mut ink, p),
         _ => return None,
     }
@@ -270,7 +273,7 @@ pub fn system(c: Cursor) -> egui::CursorIcon {
         Cursor::ResizeNwSe => C::ResizeNwSe,
         Cursor::ResizeNeSw => C::ResizeNeSw,
         Cursor::Rotate => C::Alias,
-        Cursor::Pen | Cursor::PenAdd | Cursor::PenDelete | Cursor::PenClose | Cursor::PenConvert => C::Crosshair,
+        Cursor::Pen | Cursor::PenAdd | Cursor::PenDelete | Cursor::PenClose | Cursor::PenConvert | Cursor::PenContinue => C::Crosshair,
         Cursor::Text => C::Text,
         Cursor::Hand => C::Grab,
         Cursor::HandGrab => C::Grabbing,
@@ -320,8 +323,17 @@ mod tests {
     use super::*;
 
     /// Every cursor with a glyph.
-    const GLYPHS: [Cursor; 8] =
-        [Cursor::Arrow, Cursor::ArrowHollow, Cursor::Pen, Cursor::PenAdd, Cursor::PenDelete, Cursor::PenClose, Cursor::PenConvert, Cursor::Rotate];
+    const GLYPHS: [Cursor; 9] = [
+        Cursor::Arrow,
+        Cursor::ArrowHollow,
+        Cursor::Pen,
+        Cursor::PenAdd,
+        Cursor::PenDelete,
+        Cursor::PenClose,
+        Cursor::PenConvert,
+        Cursor::PenContinue,
+        Cursor::Rotate,
+    ];
 
     fn alpha(img: &CustomCursorImage, x: usize, y: usize) -> u8 {
         img.rgba.get((y * img.size[0] as usize + x) * 4 + 3).copied().unwrap_or(0)

crates/ui-egui/src/i18n.rs

@@ -65,6 +65,8 @@ const TABLE: &[(&str, [&str; 5])] = &[
         "Paste Vector Art",
         ["Vektorgrafik einfügen", "Coller l’illustration vectorielle", "Pegar ilustración vectorial", "ベクトルアートをペースト", "粘贴矢量图稿"],
     ),
+    ("Reverse Path", ["Pfadrichtung umkehren", "Inverser le tracé", "Invertir trazado", "パスの方向反転", "反转路径"]),
+    ("Set Anchor", ["Ankerpunkt festlegen", "Définir le point d’ancrage", "Definir punto de ancla", "アンカーポイントを設定", "设置锚点"]),
     ("Clear", ["Löschen", "Effacer", "Borrar", "消去", "清除"]),
     ("Duplicate", ["Duplizieren", "Dupliquer", "Duplicar", "複製", "重复"]),
     ("Select All", ["Alles auswählen", "Tout sélectionner", "Seleccionar todo", "すべてを選択", "全选"]),

crates/ui-egui/src/i18n/ar.rs

@@ -31,6 +31,8 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Copy", "نسخ"),
     ("Paste", "لصق"),
     ("Paste Vector Art", "لصق رسم متجه"),
+    ("Reverse Path", "عكس المسار"),
+    ("Set Anchor", "تعيين نقطة الارتساء"),
     ("Clear", "مسح"),
     ("Delete", "حذف"),
     ("Duplicate", "تكرار"),

crates/ui-egui/src/i18n/it.rs

@@ -29,6 +29,8 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Copy", "Copia"),
     ("Paste", "Incolla"),
     ("Paste Vector Art", "Incolla grafica vettoriale"),
+    ("Reverse Path", "Inverti tracciato"),
+    ("Set Anchor", "Imposta ancoraggio"),
     ("Clear", "Cancella"),
     ("Duplicate", "Duplica"),
     ("Select All", "Seleziona tutto"),

crates/ui-egui/src/i18n/ja.rs

@@ -31,6 +31,8 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Copy", "コピー"),
     ("Paste", "ペースト"),
     ("Paste Vector Art", "ベクトルアートをペースト"),
+    ("Reverse Path", "パスの方向反転"),
+    ("Set Anchor", "アンカーポイントを設定"),
     ("Clear", "消去"),
     ("Duplicate", "複製"),
     ("Select All", "すべてを選択"),

crates/ui-egui/src/i18n/pt_br.rs

@@ -32,6 +32,8 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Copy", "Copiar"),
     ("Paste", "Colar"),
     ("Paste Vector Art", "Colar arte vetorial"),
+    ("Reverse Path", "Inverter demarcador"),
+    ("Set Anchor", "Definir ponto de ancoragem"),
     ("Clear", "Limpar"),
     ("Delete", "Excluir"),
     ("Duplicate", "Duplicar"),

crates/ui-egui/src/i18n/uk.rs

@@ -30,6 +30,8 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("Copy", "Копіювати"),
     ("Paste", "Вставити"),
     ("Paste Vector Art", "Вставити векторну графіку"),
+    ("Reverse Path", "Розвернути контур"),
+    ("Set Anchor", "Задати прив’язку"),
     ("Clear", "Очистити"),
     ("Duplicate", "Дублювати"),
     ("Select All", "Виділити все"),

crates/ui-egui/src/menus.rs

@@ -530,6 +530,8 @@ pub const MENUS: &[(&str, &[&str])] = &[
             ">Paths",
             "cmd:object.makeCompoundPath",
             "cmd:object.releaseCompoundPath",
+            "-",
+            "cmd:path.reverse",
             "<",
             ">Pathfinder",
             "cmd:object.pathfinder|Add|{\"op\": \"add\"}",