mirror of
git://git.code.sf.net/p/zsh/code
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43 lines
1.1 KiB
Text
43 lines
1.1 KiB
Text
# Transpose lines. This is like in emacs: with a positive argument
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# (default 1) the current line and the previous line are swapped and the
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# cursor goes down one line; with a negative argument the previous two
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# lines are swapped and the cursor goes up one line.
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emulate -L zsh
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setopt extendedglob # xtrace
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local -a match mbegin mend
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integer count=${NUMERIC:-1}
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local init prev lline final rrline
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if (( ${NUMERIC:-1} < 0 )); then
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while (( count++ )); do
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[[ $LBUFFER != (#b)(|*$'\n')([^$'\n']#$'\n')([^$'\n']#$'\n')([^$'\n']#) ]] && return 1
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LBUFFER=$match[1]$match[3]
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RBUFFER=$match[2]$match[4]$RBUFFER
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done
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else
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while (( count-- )); do
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[[ $LBUFFER != (#b)(*)$'\n'([^$'\n']#) ]] && return 1
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prev=$match[1]
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lline=$match[2]
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if [[ $prev = (#b)(*$'\n')([^$'\n']#) ]]; then
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init=$match[1]
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prev=$match[2]
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fi
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if [[ $RBUFFER = (#b)([^$'\n']#)$'\n'(*) ]]; then
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rline=$match[1]
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final=$match[2]
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prev+=$'\n'
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else
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rline=$RBUFFER
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fi
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LBUFFER=$init$lline$rline$'\n'$prev
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RBUFFER=$final
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done
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fi
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