Fix #4950: Path Precision Tools: Divide into Dashes

addon.pathtools.divideDashes cuts the selected paths (or only their
direct-selected segments) into separate open paths of a dash length
measured along the curve, with an optional gap (gap pieces dropped
unless removeGaps is false) and Fit to Corners and Ends; pieces keep
the path's appearance, one undo step, at most 100000 pieces. Geometry
in vectorcraft-pathops; dialog with unit fields and Preview; tests,
sweep cases, catalog rows and docs.

docs/mcp.md

@@ -5966,6 +5966,16 @@ Commands:
 - `addon.pathtools.crossings {cut?, selfCrossings?, ids?}` adds anchors where the selected paths cross one another (and
   where each crosses itself, with `selfCrossings`), or with `cut` also cuts them there: a path of one subpath becomes a
   path per piece. Paths that meet at a shared anchor don't cross there; at most 10,000 segments at once.
+- `addon.pathtools.divideDashes {dash?, gap?, fit?, removeGaps?}` cuts the selected paths into separate open paths
+  along the curve, each `dash` long (0.01 to 1,000,000 pt, 10 by default) with `gap` between them (0 to 1,000,000 pt,
+  0 by default: the pieces touch), every piece keeping the path's appearance, as one undo step. The gap pieces are left
+  out unless `removeGaps` is false. With direct-selected segments (or anchors) only those runs are divided, the
+  pattern running on across segments that follow one another; the rest of such a path stays as pieces of its own.
+  With `fit`, every run between corners and ends holds a whole number of dashes, all stretched or squeezed alike so it
+  starts and ends on a dash (a closed path with no corner holds whole periods); otherwise the lengths are exact and the
+  last piece of each run is what is left. The pieces are selected; more than 100,000 is refused. → `{ids, dashes}`.
+  Divide into Dashes… opens a dialog (`ui.menuDialog {command}`, kind `divideDashes`) whose fields are these
+  parameters, with Preview.
 - `addon.pathtools.cornerSet {ids?, anchors?, items?, radius, kind?}` cuts live corners, the ones Direct Selection's
   corner widgets and the Corners dialog edit, as one undo step. `ids` (default: the selection) are the paths and
   `anchors` the anchor indices of each path's outline with no corners cut; without `anchors`, a path's direct-selected

docs/target-app-parity.md

@@ -1,6 +1,6 @@
 # Parity with Adobe Illustrator
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-01 · **Change:** minor (Arrange Tools add-on: Group Overlapping Objects, #4928; scores unchanged) · **Target:** Adobe Illustrator 2026 (30.x; public release notes through 30.7, August 2026)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-01 · **Change:** minor (Path Precision Tools add-on: Divide into Dashes, #4950; scores unchanged) · **Target:** Adobe Illustrator 2026 (30.x; public release notes through 30.7, August 2026)
 
 ## Feature submission evidence
 
@@ -1403,10 +1403,15 @@ dialogs, Preview and Cancel, Zoom to Selection) and `command_sweep`. Commands: `
 
 A VectorCraft addition, not a feature of the reference app, so no area score moves. Object › Plug-ins › Arrange Tools › Group Overlapping Objects groups the top-level selected objects wherever their visual bounds overlap or touch, chains included (A overlapping B and B overlapping C makes one group of three), only among objects of the same layer or group; objects that overlap nothing stay as they are, each new group takes its frontmost member's place in the stacking order, and the groups and the loose objects stay selected. One undo step; at most 20000 objects, compared by a sweep along x with union-find. Tests: `group_overlapping_*` in `cmd::addons::arrange::tests` in `vectorcraft-engine` (chains, loners, stacking order, layers kept apart, visual bounds, no step when nothing overlaps, many objects), `group_overlapping_objects_runs_directly` in `vectorcraft-ui-egui` and `command_sweep`. Commands: `docs/mcp.md` › Arrange Tools add-on.
 
+## Path Precision Tools add-on: Divide into Dashes (2026-11-01)
+
+A VectorCraft addition, not a feature of the reference app, so no area score moves. Object › Plug-ins › Path Precision Tools › Divide into Dashes… cuts the selected paths into separate open paths along the curve (arc length, not straight distance): each `dash` long (0.01 to 1000000 pt, 10 by default) with `gap` between them (0 by default: the pieces touch); the gap pieces are left out unless Remove Gaps is off. With direct-selected segments (or anchors) only those runs are divided, the pattern running on across segments that follow one another, and the rest of such a path stays as pieces of its own. Fit to Corners and Ends gives every run between corners and ends a whole number of dashes, all stretched or squeezed alike so it starts and ends on a dash (a closed path without corners holds whole periods); otherwise the lengths are exact and each run's last piece is what is left. Every piece keeps the path's appearance and is selected; one undo step; at most 100000 pieces (more is refused). The dialog takes lengths in any unit and previews on the canvas. Tests: `dashes::tests` in `vectorcraft-pathops` (exact and fitted lengths, curves measured along them, picked segments on open and closed paths, the piece cap and bad patterns), `divide_into_dashes_*` in `cmd::addons::pathtools::tests` in `vectorcraft-engine` (gaps removed or kept, fitted lengths, the stroke kept, one undo step, selected segments only, bad params and too many pieces refused), `divide_into_dashes_opens_its_dialog_previews_and_runs_on_ok` in `vectorcraft-ui-egui` and `command_sweep`. Commands: `docs/mcp.md` › Path Precision Tools add-on.
+
 ## Revision history
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-01 | minor | Path Precision Tools add-on (a VectorCraft addition): Divide into Dashes (#4950); evidence added; scores unchanged. |
 | 2026-11-01 | minor | Arrange Tools add-on (a VectorCraft addition): Group Overlapping Objects (#4928); evidence added; scores unchanged. |
 | 2026-11-01 | minor | Type core: a Language per character (Character panel › Language, `text.setFormat` / `text.setRangeStyle {language}`, character styles), new type in the document's language; text is shaped in its language so fonts use their language forms (OpenType `locl`: Turkish `fi`, #4940, #4946); Hindi, Marathi, Gujarati, Bengali, Punjabi, Tamil, Telugu, Kannada, Malayalam, Odia and Urdu in the language list (#4943); scores unchanged |
 | 2026-10-31 | minor | Selection tools: with Alt held at the press, a Direct Selection marquee selects every path it touches whole and keeps the Group Selection pointer (#4890); a press on a selected object's centre point selects the object whole and a drag from it moves it (#4891); regression tests in `direct/tests.rs`; scores and estimates unchanged. |

docs/ui-parity.md

@@ -1,6 +1,6 @@
 # UI and interaction parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-01 · **Change:** minor (Arrange Tools add-on: Group Overlapping Objects, #4928) · **Target:** Adobe Illustrator 2026 (30.x)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-11-01 · **Change:** minor (Path Precision Tools add-on: Divide into Dashes, #4950) · **Target:** Adobe Illustrator 2026 (30.x)
 
 ## Feature submission evidence
 
@@ -332,6 +332,7 @@ next unit in the order a right-click on a ruler lists them, from Feet back to Po
 | Arrange Tools add-on (VectorCraft addition): Object › Plug-ins › Arrange Tools › Group Overlapping Objects groups the selected objects whose visual bounds overlap or touch (chains included, within one layer or group), each group at its frontmost member's stacking place, one undo step | done | #4928; `addon.arrange.groupOverlapping`, `crates/engine/src/cmd/addons/arrange.rs` and its tests; not a feature of the reference app, so it is not scored |
 | Smart Pen add-on (VectorCraft addition): Object › Plug-ins › Smart Pen selects the Smart Pen Tool, which the All Tools drawer lists under its own heading but neither toolbar shows as shipped (no shortcut), and opens the Smart Pen panel (next segment straight or curved; Remove Points Keep Shape, Make Smooth, Make Corner, Retract Handles, Close or Join). The tool draws (click: straight or curved segment, a curve after a straight one tangent; drag: smooth anchor, Alt breaks the handle, Shift 45°, Space moves it; Tab switches a segment; rubber band; close, join, continue) and edits without switching tools (click selects a point, drag moves it, Alt-click removes it keeping the shape, Shift+Alt-click deletes it, double-click toggles smooth/corner; handle drags with Shift and Alt; segment drags reshape, Alt-click adds a point) | done | `addon.pen.*`, `crates/tools/src/addons/smart_pen.rs`, `crates/ui-egui/src/addons/pen.rs` and their tests; not a feature of the reference app, so it is not scored |
 | Path Precision Tools add-on (VectorCraft addition): Object › Plug-ins › Path Precision Tools selects its seven tools (Anchor Eraser Brush, Extend Path, Measure & Inspect, Parametric Shape, Corner Tool, Slide Anchor Along Path, Shared Edge Merge Tool), which the All Tools drawer lists under their own heading but neither toolbar shows as shipped, opens the Anchor Inspector panel (the selected anchor's X/Y and handle lengths and angles as fields; Make Smooth, Make Corner, Equalize Handles, Remove Points Keep Shape, Add Points, the three ways to close) and the Parametric Shape panel (kind, count, W/H, rotation, the kind's own values and corner radius of the selected parametric shape, or of the tool's next one), and runs Add Points at / Split at Crossings and Convert to Parametric Shape; the Parametric Shape Tool draws ten re-editable kinds from the centre (↑/↓ and ←/→ change their numbers while dragging) and edits a selected one with handles; the Corner Tool cuts editable corners on any path (hover shows the anchor, a click uses its radius and kind, a drag sizes the corner, Shift whole values; a corner's marker selects it and loads its values, drags to resize, to 0 or double-clicked removes it; never past what fits; Alt-marquee cuts every anchor inside) with a Corners section in the Anchor Inspector (radius, kind, selected count, Apply to Selected Anchors); Slide Anchor Along Path drags an anchor along its curve with the segments beside it refitted, Shift snapping where the tangent is a multiple of 45°; the Shared Edge Merge Tool shows, over two paths touching at two coincident anchors, the two stretches and the edge merging them, a click merges them (half way; Shift the upper path, Alt the lower), and near anchors meet or an anchor one path lacks is added to match (Shift+Alt asks for this inside a stretch), with a Shared Edges section in the Anchor Inspector (brush diameter, coincidence 0 to 3 pt, Keep Shared Points Together, which takes coincident anchors along with the add-on's own anchor moves); a double-click on the brush or Extend Path tool opens its options | done | `addon.pathtools.*`, `crates/tools/src/addons/`, `crates/ui-egui/src/addons/pathtools.rs`, `crates/ui-egui/src/addons/pathtools/` and their tests; not a feature of the reference app, so it is not scored |
+| Path Precision Tools add-on (VectorCraft addition): Object › Plug-ins › Path Precision Tools › Divide into Dashes… (Dash and Gap in any unit, Fit to Corners and Ends, Remove Gaps; Preview) cuts the selected paths, or only their direct-selected segments, into open pieces along the curve, keeping their appearance, one undo step | done | #4950; `addon.pathtools.divideDashes`, `crates/pathops/src/addons/pathtools/dashes.rs`, `crates/ui-egui/src/addons/pathtools/dashes.rs` and their tests; not a feature of the reference app, so it is not scored |
 | Path Precision Tools add-on (VectorCraft addition): Effect › Path Effects lists its live effects (Dashes to Geometry, Add Anchors, Extend Path, Close Path, Smooth Anchors, Retract Handles, Reverse Direction, Simplify Anchors, Split at Anchors), each with the effect dialog's live Preview except Reverse Direction, which has no options, and listed in the Appearance panel like any effect | done | `addon.path.*`, `crates/effects/src/addons/path.rs`, `crates/ui-egui/src/addons/pathtools.rs` and their tests; not a feature of the reference app, so it is not scored |
 | Path Precision Tools add-on (VectorCraft addition): Object › Plug-ins › Path Precision Tools selects its four tools (Anchor Eraser Brush, Extend Path, Measure & Inspect, Parametric Shape), which the All Tools drawer lists under their own heading but neither toolbar shows as shipped, opens the Anchor Inspector panel (the selected anchor's X/Y and handle lengths and angles as fields; Make Smooth, Make Corner, Equalize Handles, Remove Points Keep Shape, Add Points, the three ways to close) and the Parametric Shape panel (kind, count, W/H, rotation, the kind's own values and corner radius of the selected parametric shape, or of the tool's next one), and runs Add Points at / Split at Crossings and Convert to Parametric Shape; the Parametric Shape Tool draws ten re-editable kinds from the centre (↑/↓ and ←/→ change their numbers while dragging) and edits a selected one with handles; a double-click on the brush or Extend Path tool opens its options | done | `addon.pathtools.*`, `crates/tools/src/addons/`, `crates/ui-egui/src/addons/pathtools.rs`, `crates/ui-egui/src/addons/pathtools/shape.rs` and their tests; not a feature of the reference app, so it is not scored |
 | Path Precision Tools add-on (VectorCraft addition): Object › Plug-ins › Path Precision Tools selects its six tools (Anchor Eraser Brush, Extend Path, Measure & Inspect, Parametric Shape, Corner Tool, Slide Anchor Along Path), which the All Tools drawer lists under their own heading but neither toolbar shows as shipped, opens the Anchor Inspector panel (the selected anchor's X/Y and handle lengths and angles as fields; Make Smooth, Make Corner, Equalize Handles, Remove Points Keep Shape, Add Points, the three ways to close) and the Parametric Shape panel (kind, count, W/H, rotation, the kind's own values and corner radius of the selected parametric shape, or of the tool's next one), and runs Add Points at / Split at Crossings and Convert to Parametric Shape; the Parametric Shape Tool draws ten re-editable kinds from the centre (↑/↓ and ←/→ change their numbers while dragging) and edits a selected one with handles; the Corner Tool cuts editable corners on any path (hover shows the anchor, a click uses its radius and kind, a drag sizes the corner, Shift whole values; a corner's marker selects it and loads its values, drags to resize, to 0 or double-clicked removes it; never past what fits; Alt-marquee cuts every anchor inside) with a Corners section in the Anchor Inspector (radius, kind, selected count, Apply to Selected Anchors); Slide Anchor Along Path drags an anchor along its curve with the segments beside it refitted, Shift snapping where the tangent is a multiple of 45°; a double-click on the brush or Extend Path tool opens its options | done | `addon.pathtools.*`, `crates/tools/src/addons/`, `crates/ui-egui/src/addons/pathtools.rs`, `crates/ui-egui/src/addons/pathtools/` and their tests; not a feature of the reference app, so it is not scored |
@@ -382,6 +383,7 @@ separate. Scores and hours unchanged. [Behavior and command details](development
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-01 | minor | Path Precision Tools add-on (a VectorCraft addition): Divide into Dashes (#4950); scores and estimates unchanged |
 | 2026-11-01 | minor | Arrange Tools add-on (a VectorCraft addition): Group Overlapping Objects (#4928); scores and estimates unchanged |
 | 2026-11-01 | minor | Character panel › Language: the selected characters' language, from Document Setup's list, which gains Hindi, Marathi, Gujarati, Bengali, Punjabi, Tamil, Telugu, Kannada, Malayalam, Odia and Urdu (#4946, #4943); the Digits menu's numeral names keep their own translations; scores unchanged |
 | 2026-11-01 | minor | VectorCraft Options' Version is a menu of the versions VectorCraft writes, each named by the releases that read it, and an uncompressible version turns Use Compression off (#4931); a save refused before writing shows the Can't save alert with the reason (#4933); About › Contributors' table keeps its header row above the scrolling rows (#4944); the Gradient panel's freeform point swatch opens the point's popover (#4953); scores unchanged |