These Object commands edited the document even when nothing changed, so
the call recorded an undo step, emptied Redo and marked the document
modified:
- object.align, object.distributeSpacing and object.distribute (three
or more objects) when no object moves. With one object selected,
Object › Align aligns it to its own bounds, so it recorded a step
every time. Calls on objects that were already aligned or evenly
spaced also recorded a step, including objects that an earlier Align
or Distribute left a rounding error away from the position the next
call computes.
- Move, Rotate, Scale, Shear, Transform and Nudge by an identity
transform without a copy, Transform Again after one, Set Bounds with
the current position and size, and a Selection tool drag that ends
where it started.
- Nudge by 0 with anchors direct-selected or with only ruler guides
selected, and Transform with nothing selected or with ids that name
no object, with or without a copy.
- Bring to Front and Bring Forward on objects already in front, Send to
Back and Send Backward on objects already at the back, and Send to
Current Layer on objects already on top of the current layer.
- Ungroup, Release Compound Path and Release Clipping Mask with none of
their objects selected, and Expand Shape with no live shape selected.
- Lock with every selected object already locked, Hide with every one
already hidden, Unlock All with nothing locked and Show All with
nothing hidden.
- object.setProps with the values the objects already have, or with no
object.
- object.setLiveShape with the values the shape already has: a
polygon's sides, angle, radius or equal sides, or a side length that
gives exactly its current radius; an ellipse's pie, including Invert
Pie on a whole ellipse; and a corner radius or kind that the corners
already have.
These commands now return without editing the document, and Align and
Distribute count a move of 1e-9 pt or less on both axes as none. Such a
call records no undo step, keeps the step to redo and leaves the
document unmodified. In these cases Ungroup no longer resets the
selection, and Release Compound Path, Unlock All and Show All no longer
empty it. A Transform with a copy of no object keeps the selection.
Lock and Hide still deselect the objects. A Nudge by 0 no longer
expands a live shape whose anchors are direct-selected. The replies
have the same form as before. An identity transform still sets what
Transform Again repeats. The journal still records each call, so the
Actions panel records it as before.
When every value given to Set Bounds is the current one, it now applies
the identity transform instead of the transform computed from those
values, which can differ from the identity by a rounding error on a
rotated object or with Use Preview Bounds.
When a drag comes back to its start, the identity preview no longer
edits the document. Session::preview now advances the revision when it
undoes the previous preview, so views redraw that drag.
The undo and redo row of docs/mcp.md now notes that many calls that
change nothing record no undo step, so undo after one undoes the step
before it.
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