Class: RubyCurses::SimpleUndo
- Inherits:
-
AbstractUndo
- Object
- AbstractUndo
- RubyCurses::SimpleUndo
- Defined in:
- lib/rbcurse/experimental/widgets/undomanager.rb
Overview
An implementation of AbstractUndo for textarea. Very basic.
Instance Method Summary collapse
-
#initialize(_source) ⇒ SimpleUndo
constructor
A new instance of SimpleUndo.
-
#perform_redo(act) ⇒ Object
this has to be bound in source.
- #perform_undo(act) ⇒ Object
- #source(_source) ⇒ Object
Methods inherited from AbstractUndo
Constructor Details
#initialize(_source) ⇒ SimpleUndo
Returns a new instance of SimpleUndo.
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# File 'lib/rbcurse/experimental/widgets/undomanager.rb', line 110 def initialize _source super end |
Instance Method Details
#perform_redo(act) ⇒ Object
this has to be bound in source
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# File 'lib/rbcurse/experimental/widgets/undomanager.rb', line 153 def perform_redo act row = act.row col = act.index0 $log.debug " REDO processing #{act} " case act.type when :INSERT @source.list[row].insert(col, act.text) when :DELETE row = act.row col = act.index0 howmany = act.index1 - col @source.list[row].slice!(col,howmany) when :DELETE_LINE #$log.debug " UNDO redo got deleteline #{row} " #@source.list.delete_at row # changed on 2010-05-23 12:21 since was not handling mult delete case act.text when Array act.text.size.times { @source.list.delete_at row } when String @source.list.delete_at row end when :INSERT_LINE case act.text when Array index = row act.text.each_with_index{|r,i| @source.list.insert index+i, r} when String @source.list.insert row, act.text end else $log.warn "unhandled change type #{act.type} " end end |
#perform_undo(act) ⇒ Object
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# File 'lib/rbcurse/experimental/widgets/undomanager.rb', line 117 def perform_undo act row = act.row col = act.index0 $log.debug " processing #{act} " case act.type when :INSERT howmany = act.index1 - col @source.list[row].slice!(col,howmany) when :DELETE $log.debug " UNDO processing DELETE #{col}, (#{act.text}) " @source.list[row].insert(col, act.text.chomp) when :DELETE_LINE $log.debug " UNDO inside delete-line #{row} " #@source.list.insert(row, act.text) # insert a blank line, since one was deleted case act.text when Array index = row act.text.each_with_index{|r,i| @source.list.insert index+i, r} when String @source.list.insert row, act.text end when :INSERT_LINE $log.debug " UNDO inside insert-line #{row} " case act.text when Array act.text.size.times { @source.list.delete_at row } when String @source.list.delete_at row end else $log.warn "unhandled change type #{act.type} " end @source.repaint_required true @reject_update = false end |
#source(_source) ⇒ Object
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# File 'lib/rbcurse/experimental/widgets/undomanager.rb', line 113 def source(_source) super _source.bind(:CHANGE){|eve| add_edit(eve) } end |