Sha256: 9e319b83796449a4b8931c89e35107d143cc146f36a299e9808c3dabf9084edd
Contents?: true
Size: 1.21 KB
Versions: 4
Compression:
Stored size: 1.21 KB
Contents
class Trix.UndoManager extends Trix.BasicObject
constructor: (@composition) ->
@undoEntries = []
@redoEntries = []
recordUndoEntry: (description, {context, consolidatable} = {}) ->
previousEntry = @undoEntries[-1..][0]
unless consolidatable and entryHasDescriptionAndContext(previousEntry, description, context)
undoEntry = @createEntry({description, context})
@undoEntries.push(undoEntry)
@redoEntries = []
undo: ->
if undoEntry = @undoEntries.pop()
redoEntry = @createEntry(undoEntry)
@redoEntries.push(redoEntry)
@composition.loadSnapshot(undoEntry.snapshot)
redo: ->
if redoEntry = @redoEntries.pop()
undoEntry = @createEntry(redoEntry)
@undoEntries.push(undoEntry)
@composition.loadSnapshot(redoEntry.snapshot)
canUndo: ->
@undoEntries.length > 0
canRedo: ->
@redoEntries.length > 0
# Private
createEntry: ({description, context} = {}) ->
description: description?.toString()
context: JSON.stringify(context)
snapshot: @composition.getSnapshot()
entryHasDescriptionAndContext = (entry, description, context) ->
entry?.description is description?.toString() and entry?.context is JSON.stringify(context)
Version data entries
4 entries across 4 versions & 1 rubygems