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| | # Transpose segments, i.e. parts of line obtained by (z) flag, i.e.
# as if zsh parsed the line.
#
# Code to activate the functionality with Alt-t:
# autoload transpose-segments
# zle -N transpose-segments
# bindkey "^[t" transpose-segments
local curcontext=":zle:$WIDGET" skip
local MATCH MBEGIN MEND
# Will remember white spaces before each segment
typeset -a spaces
spaces=()
# Working variable for $BUFFER
local buf="$BUFFER"
# Split the buffer
typeset -a bufarr
bufarr=( "${(z)buf}" )
# (z) handles spaces nicely, but we need them for the user
integer size="$#bufarr"
integer char_count=0
integer selected_segment=0
for (( i=1; i<=size; i++ )); do
local segment="$bufarr[i]"
# In general, $buf can start with white spaces
# We will not search for them, but instead
# search for any char that's current segment's
# leading character. So this is an approach that
# doesn't trust [::space::]
local leadchar="$segment[1]"
buf="${buf##(#m)[^$leadchar]#}"
# Remember the spaces
spaces[$i]="$MATCH"
# Count all characters being processed, remove the spaces, then remove segment
char_count=char_count+"$#MATCH"+"$#segment"
buf="${buf#$MATCH}"
MATCH=""
buf="${buf#(#m)$segment}"
# If segment not found, return from the function doing nothing
# This of course shoudln't happen
[ -z "$MATCH" ] && return 0
# Detect which segment is active
[[ "$selected_segment" -eq 0 && "$char_count" -ge "$CURSOR" ]] && selected_segment=i
done
# What's left in $buf can be only white spaces
spaces[i]="$buf"
char_count=char_count+"$#buf"
[[ "$selected_segment" -eq 0 && "$char_count" -ge "$CURSOR" ]] && selected_segment=i-1
# No active segment found, or it's a first segment? Return. (this shouldn't happen)
[[ "$selected_segment" -eq "0" || "$selected_segment" -eq "1" ]] && return 0
# Swap segments
local tmp="$bufarr[selected_segment]"
bufarr[selected_segment]="$bufarr[selected_segment-1]"
bufarr[selected_segment-1]="$tmp"
# Build BUFFER
integer curbkp="$CURSOR"
BUFFER=""
for (( i=1; i<=size; i++ )); do
BUFFER+="$spaces[i]$bufarr[i]"
done
CURSOR="$curbkp"
# Append final white spaces
BUFFER+="$spaces[i]"
return 0
|