Captured state of an element at a point in time. More...

#include "donner/editor/UndoTimeline.h"

Collaboration diagram for donner::editor::UndoSnapshot:

Public Types
enum class	Kind : std::uint8_t { Transform , DocumentSource }
	The kind of state captured by this snapshot. More...

Public Attributes
Kind	kind = Kind::Transform
	Snapshot payload kind.
svg::SVGElement	element
	The element this snapshot applies to.
Transform2d	transform
	The captured transform.
std::optional< AttributeWritebackTarget >	writebackTarget
	Stable locator for the element, used to resolve a live handle after a self-initiated ReplaceDocument swaps the document identity.
std::optional< RcString >	sourceTransformAttributeValue
	Exact transform= attribute bytes from the source pane, when undo should restore the user's original text verbatim instead of the canonical serializer output. std::nullopt means the attribute was absent in the captured source.
bool	restoreSourceTransformAttributeValue = false
	Whether sourceTransformAttributeValue should be restored verbatim. When false, source writeback falls back to canonical serialization of transform.
std::string	documentSource
	Full SVG source text for Kind::DocumentSource snapshots.
std::vector< AttributeWritebackTarget >	selectionTargets
	Selection targets to restore after a Kind::DocumentSource snapshot reparses the document.
std::vector< UndoSnapshot >	extras
	Additional element snapshots that belong to the same user operation. Multi-selection move/resize/rotate gestures use this so one UI undo restores the whole manipulation instead of stepping through elements one at a time.

Detailed Description

Captured state of an element at a point in time.

Member Enumeration Documentation

strong

The kind of state captured by this snapshot.

Enumerator
Transform	A graphics element's local transform.
DocumentSource	The full SVG source text for structural edits such as element deletion.

The documentation for this struct was generated from the following file: