Sha256: 4f5756e063386a9ad3295d11c61b9a94a27ee09faf530143354a44e4146cf3a4
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Size: 892 Bytes
Versions: 21
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Stored size: 892 Bytes
Contents
module Redwood ## Implements a single undo list for the Sup instance ## ## The basic idea is to keep a list of lambdas to undo ## things. When an action is called (such as 'archive'), ## a lambda is registered with UndoManager that will ## undo the archival action class UndoManager include Singleton def initialize @@actionlist = [] end def register desc, *actions, &b actions = [*actions.flatten] actions << b if b raise ArgumentError, "need at least one action" unless actions.length > 0 @@actionlist.push :desc => desc, :actions => actions end def undo unless @@actionlist.empty? actionset = @@actionlist.pop actionset[:actions].each { |action| action.call } BufferManager.flash "undid #{actionset[:desc]}" else BufferManager.flash "nothing more to undo!" end end def clear @@actionlist = [] end end end
Version data entries
21 entries across 21 versions & 1 rubygems