mirror of
git://git.code.sf.net/p/zsh/code
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124 lines
3.5 KiB
Plaintext
124 lines
3.5 KiB
Plaintext
# Restrict the start of the editable line to the region between cursor
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# and mark (including the character at the end). Can be bound used as
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# a zle widget, or called as a function from another widget.
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#
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# Optionally accepts exactly two arguments, which are used instead of
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# $CURSOR and $MARK as limits to the range.
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#
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# Other options:
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# -p pretext show `pretext' instead of the buffer text before the region.
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# -P posttext show `posttext' instead of the buffer text after the region.
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# Either or both may be empty.
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# -n Only replace the text before or after the region with
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# the -p or -P options if the text was not empty.
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# -S statevar
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# -R statevar
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# Save or restore the state in/from the parameter named statevar. In
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# either case no recursive editing takes place; this will typically be
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# done within the calling function between calls with -S and -R. The
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# statevar may not begin with the prefix _ntr_ which is reserved for
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# parameters within narrow-to-region.
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emulate -L zsh
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setopt extendedglob
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local _ntr_lbuffer _ntr_rbuffer
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local _ntr_predisplay=$PREDISPLAY _ntr_postdisplay=$POSTDISPLAY
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integer _ntr_start _ntr_end _ntr_swap _ntr_cursor=$CURSOR _ntr_mark=$MARK
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integer _ntr_stat
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local _ntr_opt _ntr_pretext _ntr_posttext _ntr_usepretext _ntr_useposttext
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local _ntr_nonempty _ntr_save _ntr_restore
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while getopts "np:P:R:S:" _ntr_opt; do
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case $_ntr_opt in
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(n) _ntr_nonempty=1
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;;
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(p) _ntr_pretext=$OPTARG _ntr_usepretext=1
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;;
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(P) _ntr_posttext=$OPTARG _ntr_useposttext=1
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;;
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(R) _ntr_restore=$OPTARG
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;;
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(S) _ntr_save=$OPTARG
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;;
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(*) [[ $_ntr_opt != '?' ]] && print "$0: unhandled option: $_ntr_opt" >&2
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return 1
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;;
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esac
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done
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(( OPTIND > 1 )) && shift $(( OPTIND - 1 ))
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if [[ $_ntr_restore = _ntr_* || $_ntr_save = _ntr_* ]]; then
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zle -M "$0: _ntr_ prefix is reserved" >&2
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return 1
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fi
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if [[ -n $_ntr_save || -z $_ntr_restore ]]; then
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if (( $# )); then
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if (( $# != 2 )); then
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zle -M "$0: supply zero or two arguments"
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return 1
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fi
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_ntr_start=$1
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_ntr_end=$2
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else
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_ntr_start=$MARK
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_ntr_end=$CURSOR
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fi
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if (( _ntr_start > _ntr_end )); then
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_ntr_swap=_ntr_start
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_ntr_start=_ntr_end
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_ntr_end=_ntr_swap
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fi
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(( _ntr_end++, _ntr_cursor -= _ntr_start, _ntr_mark -= _ntr_start ))
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_ntr_lbuffer=${BUFFER[1,_ntr_start]}
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if [[ -z $_ntr_usepretext || ( -n $_ntr_nonempty && -z $_ntr_lbuffer ) ]]
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then
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_ntr_pretext=$_ntr_lbuffer
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fi
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_ntr_rbuffer=${BUFFER[_ntr_end,-1]}
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if [[ -z $_ntr_useposttext || ( -n $_ntr_nonempty && -z $_ntr_rbuffer ) ]]
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then
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_ntr_posttext=$_ntr_rbuffer
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fi
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PREDISPLAY="$_ntr_predisplay$_ntr_pretext"
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POSTDISPLAY="$_ntr_posttext$_ntr_postdisplay"
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BUFFER=${BUFFER[_ntr_start+1,_ntr_end-1]}
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CURSOR=$_ntr_cursor
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MARK=$_ntr_mark
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if [[ -n $_ntr_save ]]; then
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eval "$_ntr_save=(${(qq)_ntr_predisplay} ${(qq)_ntr_postdisplay}
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${(qq)_ntr_lbuffer} ${(qq)_ntr_rbuffer})" || return 1
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fi
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fi
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if [[ -z $_ntr_save && -z $_ntr_restore ]]; then
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zle recursive-edit
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_ntr_stat=$?
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fi
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if [[ -n $_ntr_restore || -z $_ntr_save ]]; then
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if [[ -n $_ntr_restore ]]; then
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if ! eval "_ntr_predisplay=\${${_ntr_restore}[1]}
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_ntr_postdisplay=\${${_ntr_restore}[2]}
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_ntr_lbuffer=\${${_ntr_restore}[3]}
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_ntr_rbuffer=\${${_ntr_restore}[4]}"; then
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zle -M Failed.
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return 1
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fi
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fi
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PREDISPLAY=$_ntr_predisplay
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POSTDISPLAY=$_ntr_postdisplay
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LBUFFER="$_ntr_lbuffer$LBUFFER"
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RBUFFER="$RBUFFER$_ntr_rbuffer"
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fi
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return $_ntr_stat
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