Tools: Escape cancels an Anchor Point, Mesh, Shape Builder or Measure drag

Escape did not cancel a drag with the Anchor Point, Mesh, Shape Builder
and Measure tools, or a Direct Selection drag of a mesh point, a corner
widget or the brackets of type on a path: the drag went on until the
mouse was released. Escape cancels every other Direct Selection drag
and a drag with the Free Transform, Rotate, Reflect, Scale, Shear and
Gradient tools.

Escape now cancels an Anchor Point drag, a Mesh tool drag of a mesh
point or handle, and a Direct Selection drag of a mesh point or handle,
a corner widget or the brackets of type on a path. The art goes back to
how the press found it, no undo step is added, and the rest of the drag
and the release send nothing. Escape during a Shape Builder drag ends
it, so the release merges and deletes nothing; the tool takes Escape
only during the drag. Escape during a Measure tool drag ends it and
brings back the measurement shown before the press. Escape after an
Anchor Point or Direct Selection press that has not moved yet drops the
press. Otherwise, outside a drag, Escape does what it did before.

Docs: docs/mcp.md, docs/target-app-parity.md.

docs/mcp.md

@@ -2449,7 +2449,8 @@ so `path.moveAnchors {dx, dy}` (or a Direct Selection drag) pulls the path apart
 Selected End Points) joins the ends again; `path.join {ids: [a, b], ends: ["last", "first"]}` joins the ends asked for
 (the Pen's join, #776: drawing on from one open path, a click on another's end makes them one path). `path.convertAnchor {id, subpath?, anchor, to, x?, y?}` and
 `path.split {id, subpath?, anchor}` do the same to one anchor (the Anchor Point and Scissors tools); the Pen with Alt
-held over a selected path's handle, anchor or segment works as the Anchor Point tool. `path.reshapeSegment {id,
+held over a selected path's handle, anchor or segment works as the Anchor Point tool. `press_key` Escape between two
+`pointer_gesture` calls of an Anchor Point drag cancels it: the path goes back and no undo step is added. `path.reshapeSegment {id,
 subpath?, segment, t, dx, dy, perpendicular?}` (a segment dragged with Direct Selection or the Anchor Point tool) moves the segment's
 point at `t` by `dx`, `dy`: a smooth anchor at either end stays smooth, its other handle turning with the moved one.
 With `perpendicular: true` (Shift held during the drag) both of the segment's handles stand at right angles to the
@@ -5059,6 +5060,8 @@ under the opposite corner, else of the front-most selected object. A Shift-click
 as a click does, so with `clickStrokeSplitsPath` on, a Shift-click on a stroke splits it. A marquee splits no stroke,
 however little the pointer moves: the tool sends no `splitStroke` with `rect`, and `shapeBuilder.merge` does not split
 a stroke when it has `rect`. With both `rect` and `points`, the command also touches what the points touch.
+`press_key` Escape during a Shape Builder drag, a marquee included, cancels it: the release sends no
+`shapeBuilder.merge`.
 
 ```json
 {"name":"run_command","arguments":{"command":"shapeBuilder.merge","params":{"rect":[50,50,200,200]}}}
@@ -5352,7 +5355,8 @@ right/left/down/up; none stored means the smooth mesh through the points, as old
 `object.envelope.setMeshPoint {id, index, x, y, handle?}` and `object.mesh.movePoint`, `object.mesh.addLine` and
 `object.mesh.deletePoint` edit them like a gradient mesh's (one undo step each). On the canvas a selected envelope
 shows its mesh; the Mesh tool and Direct Selection drag its points and the clicked point's handles, and the Mesh tool
-adds a row and a column where it clicks inside. The Control bar shows Edit Envelope / Edit Contents, the warp's
+adds a row and a column where it clicks inside. `press_key` Escape during a drag of a point or handle of a mesh
+envelope or a gradient mesh cancels it: the point goes back and no undo step is added. The Control bar shows Edit Envelope / Edit Contents, the warp's
 style, orientation, bend and distortions (or the mesh's rows and columns), Reset (an unbent warp, a flat mesh) and
 Envelope Options.
 

docs/target-app-parity.md

@@ -472,6 +472,7 @@ since 2026-10-01.
 
 - **Clipping paths on their outline (G1):** the selection tools (Selection, Direct Selection, Group Selection), Object Highlighting and a right-click take a clipping path on its outline before the art it clips; Select Behind lists the same; the eyedropper, the tools that act on what is drawn and the selection tools' double-clicks, loaded text and guide release take the art. Doc and tool regression tests; score unchanged.
 - **Existing-guide Escape cancellation (G1):** Escape clears a pending guide press or drag through Selection and Direct/Group Selection, cancelling a begun preview. Eight app-input regressions cover both axes, move/copy, temporary selection-tool borrowing from idle Pen, preselected-guide document/interaction-start selection and Undo/Redo/saved-state preservation, later on-canvas motion/release, Shift-press cancellation, and ordinary-release/Enter/idle controls. Historical focused checks on `8ab574b7` recorded five expected RED failures with three passing controls, then all eight GREEN tests and the Direct Selection Escape control passed. All nine also passed in current full CI. A full CI retry on the five-unit combined source at `a0671777` passed all seven stages with 6,613 test outcomes on 2026-10-14. An earlier full-CI run on the identical source panicked in the randomized `ai_mutated_save_never_panics` test; the cause remains unresolved. This five-fix batch does not claim to repair that failure. The original 1280×960 headless app capture from `b076025a` was reviewed for one vertical Selection guide after Escape; source review found its scene unchanged on `a0671777`. Scores and hours unchanged.
+- **Escape in more tool drags:** Escape during an Anchor Point drag, a Mesh tool drag, a Direct Selection drag of a mesh point, a corner widget or the brackets of type on a path, or a Shape Builder drag cancels it: the art goes back to how the press found it, no undo step is added, the release does nothing, and the tool stays chosen. Escape during a Measure tool drag brings back the measurement before it. Regression tests: `escape_cancels_*` in `draw2/anchor/tests.rs`, `meshedit.rs`, `direct/tests.rs`, `builder/tests.rs` and `xform/measure.rs`, and `escape_cancels_an_anchor_point_mesh_shape_builder_or_measure_drag` in `tests/toolescape.rs`.
 - **TIFF in screen and asset export:** both format menus expose the existing TIFF encoder and Format Settings. Headless UI regressions choose TIFF and check scaled dimensions, artboard selection, filenames, encoding options, saved settings and collected-asset output. Public reference: [Export for Screens](https://helpx.adobe.com/illustrator/desktop/save-and-export/export-files-to-different-formats/export-for-screens.html), updated 2026-09-28, lists TIFF for both artboards and assets. Adobe staff [confirmed support in 30.2.1](https://illustrator.uservoice.com/forums/333657-illustrator-desktop-feature-requests/suggestions/49081034-add-tiff-format-into-export-for-screens-assets-d) on 2026-02-19; the older 2025 Collect assets guide omits TIFF.
 - **Export for Screens of the selected artboards:** while the Artboard tool is in use, File › Export › Export for Screens… (`file.exportForScreens`) opens with the artboards the tool has selected checked on its Artboards tab, and Export Artboard writes only those. Shift-clicks on the canvas, or Shift- or Ctrl/Cmd-clicks on the Artboards panel's rows, select several. The other fields show the settings the document last exported with. With another tool in use, the dialog takes its artboard choice from those settings too. Public reference: [Export selected artboards](https://helpx.adobe.com/illustrator/desktop/create-manage-artboards/organize-manage-artboards/export-artboards.html).