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users/16932: implement $UNDO_CHANGE_NO and argument to undo widget

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Peter Stephenson 2012-03-29 20:31:33 +00:00
parent 8bb9818cd4
commit 13a45d74eb
6 changed files with 59 additions and 4 deletions
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Doc/Zsh/zle.yo
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@ -877,6 +877,12 @@ any predisplay string should be highlighted in bold.
Note that the effect of tt(region_highlight) is not saved and disappears
as soon as the line is accepted.
)
vindex(UNDO_CHANGE_NO)
item(tt(UNDO_CHANGE_NO) (integer))
A number representing the state of the undo history. The only use
of this is passing as an argument to the tt(undo) widget in order to
undo back to the recorded point. Read-only.
)
vindex(WIDGET)
item(tt(WIDGET) (scalar))(
The name of the widget currently being executed; read-only.
@ -2164,7 +2170,10 @@ command is typed. By default it beeps.
)
tindex(undo)
item(tt(undo) (^_ ^Xu ^X^U) (unbound) (unbound))(
Incrementally undo the last text modification.
Incrementally undo the last text modification. When called from a
user-defined widget, takes an optional argument indicating a previous state
of the undo history as returned by the tt(UNDO_CHANGE_NO) variable;
modifications are undone until that state is reached.
)
tindex(redo)
item(tt(redo))(