diff options
Diffstat (limited to 'Functions/Zle/incarg')
| -rw-r--r-- | Functions/Zle/incarg | 322 |
1 files changed, 291 insertions, 31 deletions
diff --git a/Functions/Zle/incarg b/Functions/Zle/incarg index cff0cfe4c..0cfaf9ff5 100644 --- a/Functions/Zle/incarg +++ b/Functions/Zle/incarg @@ -1,43 +1,303 @@ -# Shell function to increment an integer either under the cursor or just -# to the left of it. Use +emulate -L zsh + +# A ZLE widget to increment an integer. +# +# In addition to decimals, it can handle hexadecimals prefixed with "0x", +# binaries with "0b", and octals with "0o". +# +# By default, the target integer will be incremented by one. With a numeric +# argument, the integer is incremented by the amount of the argument. The shell +# parameter "incarg" may be set to change the default increment to something +# other than one. +# +# The behavior of this widget changes depending on how it is named. +# +# - incarg / decarg +# +# incarg will increment an integer either under the cursor or just to the left +# of it. decarg, on the other hand, will decrement it. +# +# For example, +# +# echo 41 +# ^^^ cursor anywhere here +# +# with incarg gives +# +# echo 42 +# ^ cursor will move here +# +# - sync-incarg / sync-decarg +# +# The sync- variant is used for creating a sequence of numbers on split +# terminals with synchronized key input. The first pane won't be incremented +# at all, but each pane after that will have the number incremented once more +# than the previous pane. +# +# Currently supports tmux and iTerm2. +# +# - vim-incarg / vim-decarg +# +# This behaves like Vim's CTRL-A / CTRL-X. It moves the cursor to the nearest +# number after the cursor and increments or decrements it. +# +# - vim-backward-incarg / vim-backward-decarg +# +# This behaves like vim-incarg & vim-decarg, but it searches backwards for a +# number. +# +# - vim-sync-incarg / vim-sync-decarg +# +# This combines the behavior of the vim- and sync- variants. It's inspired by +# Vim's g_CTRL-A / g_CTRL-X. +# +# - vim-backward-sync-incarg / vim-backward-sync-decarg +# +# This combines the behavior of the vim-backward- and sync- variants. +# +# Example Usage: +# # autoload -Uz incarg -# zle -N incarg -# bindkey "..." incarg -# to define it. For example, -# echo 41 -# ^^^ cursor anywhere here -# with incarg gives -# echo 42 -# with the cursor in the same place. -# -# A numeric argument gives a number other than 1 to add (may be negative). -# If you're going to do it a lot with one particular number, you can set -# the parameter incarg to that number (a numeric argument still takes -# precedence). +# for widget in vim-{,sync-}{inc,dec}arg; do +# zle -N "$widget" incarg +# done +# bindkey -a \ +# '^A' vim-incarg \ +# '^X' vim-decarg \ +# 'g^A' vim-sync-incarg \ +# 'g^X' vim-sync-decarg -emulate -L zsh -setopt extendedglob +zle -f vichange -local rrest lrest num +setopt localoptions extended_glob +local match mbegin mend MATCH MBEGIN MEND i -rrest=${RBUFFER##[0-9]#} -if [[ $RBUFFER = [0-9]* ]]; then - if [[ -z $rrest ]]; then - num=$RBUFFER - else - num=${RBUFFER[1,-$#rrest-1]} +[[ -z "$BUFFER" ]] && return 1 + +# find the number and determine the base +integer pos=$(( CURSOR + 1 )) base=0 + +# avoid miscalculating positions when cursor is at the end of the line +while (( pos > 0 )) && [[ "$BUFFER[pos]" == '' ]]; do + (( pos-- )) +done + +# check for a prefix (e.g., 0x) before the cursor +for (( i = 0; i < 2; i++ )); do + case "$BUFFER[1,pos]" in + *0[xX][0-9a-fA-F]##) base=16 ;; + *0[oO][0-7]##) base=8 ;; + *0[bB][01]##) base=2 ;; + *[1-9]) base=10 ;; + *0) ;; # there may be a prefix right after the cursor + *) + # the non-Vim variant looks right before the cursor too, but not after it + if [[ "$WIDGET" != vi* ]]; then + if (( i == 0 )); then + (( pos-- )) + continue + else + return 1 + fi + fi + ;; + esac + + break +done + +# check for a prefix on the cursor +if (( base == 0 && pos < $#BUFFER )); then + case "$BUFFER[1,pos+1]" in + *0[xX][0-9a-fA-F]) base=16; (( pos++ )) ;; + *0[oO][0-7]) base=8; (( pos++ )) ;; + *0[bB][01]) base=2; (( pos++ )) ;; + esac +fi + +if (( base == 0 )); then + if [[ "$WIDGET" == vi* ]]; then + if [[ "$WIDGET" == *backward-* ]]; then + # search backwards for a number + while true; do + case "$BUFFER[1,pos]" in + *0[xX][0-9a-fA-F]##) base=16 ;; + *0[oO][0-7]##) base=8 ;; + *0[bB][01]##) base=2 ;; + *[0-9]) base=10 ;; + *-) + case "$BUFFER[pos,-1]" in + -0[xX][0-9a-fA-F]*) ;; + -0[oO][0-7]*) ;; + -0[bB][01]*) ;; + -[0-9]*) base=10 ;; + esac + ;; + esac + (( base != 0 )) && break + + (( pos-- )) + (( pos <= 0 )) && return 1 + done + else + # jump to the nearest number after the cursor + while [[ "$BUFFER[pos]" == [^0-9] ]]; do + (( pos++ )) + (( pos > $#BUFFER )) && return 1 + done + fi + fi + + # check for a prefix right after the cursor and jump right after it, if any + if (( pos <= 1 )) || [[ "$BUFFER[pos-1]" == [^0-9] ]]; then + case "$BUFFER[pos,-1]" in + 0[xX][0-9a-fA-F]*) base=16; (( pos += 2 )) ;; + 0[oO][0-7]*) base=8; (( pos += 2 )) ;; + 0[bB][01]*) base=2; (( pos += 2 )) ;; + esac fi fi -lrest=${LBUFFER%%[0-9]#} -if [[ $LBUFFER = *[0-9] ]]; then - if [[ -z $lrest ]]; then - num="$LBUFFER$num" +if (( base == 0 )); then + base=10 +fi + +# find the start of the number +integer first="$pos" +case "$base" in + 10) + while [[ "$BUFFER[first-1]" == [0-9] ]]; do + (( first-- )) + done + if [[ $BUFFER[first-1] = - ]]; then + (( first-- )) + fi + ;; + 2) + while [[ "$BUFFER[first-1]" == [01] ]]; do + (( first-- )) + done + ;; + 8) + while [[ "$BUFFER[first-1]" == [0-7] ]]; do + (( first-- )) + done + ;; + 16) + while [[ "$BUFFER[first-1]" == [0-9a-fA-F] ]]; do + (( first-- )) + done + ;; +esac + +# find the end of the number +integer last="$pos" +case "$base" in + 10) + while [[ "$BUFFER[last+1]" == [0-9] ]]; do + (( last++ )) + done + ;; + 2) + while [[ "$BUFFER[last+1]" == [01] ]]; do + (( last++ )) + done + ;; + 8) + while [[ "$BUFFER[last+1]" == [0-7] ]]; do + (( last++ )) + done + ;; + 16) + while [[ "$BUFFER[last+1]" == [0-9a-fA-F] ]]; do + (( last++ )) + done + ;; +esac + +# calculate the number of digits +integer ndigits=0 +case "$BUFFER[first,first+1]" in + 0*|-0) ndigits=$(( last - first + 1 )) ;; +esac + +# determine the amount to increment +integer delta=${NUMERIC:-${incarg:-1}} +if [[ "$WIDGET" = *decarg ]]; then + (( delta = -delta )) +fi +if [[ "$WIDGET" = *sync-* ]]; then + integer pane_index=0 + if [[ -n "$TMUX_PANE" ]]; then + pane_index="$(tmux display-message -pt "$TMUX_PANE" '#{pane_index}')" + elif [[ "$ITERM_SESSION_ID" =~ '^w[0-9]+t[0-9]+p([0-9]+)' ]]; then + pane_index="$match[1]" else - num="${LBUFFER[$#lrest+1,-1]}$num" + zle -M "[$WIDGET] unsupported terminal" + return 1 fi + (( delta *= pane_index )) fi -[[ -n $num ]] && (( num += ${NUMERIC:-${incarg:-1}} )) +local old="$BUFFER[first,last]" +integer oldlen=$#BUFFER +integer oldnum="$base#$old" 2> /dev/null + +# -00 should increment to 01 instead of 001 +if [[ "$BUFFER[first]" == '-' ]] && (( oldnum == 0 )); then + (( ndigits-- )) +fi + +local fmt1 fmt2 +case "$base" in + 10) fmt1=d; fmt2='#10' ;; + 2) fmt1=s; fmt2='##2' ;; + 8) fmt1=s; fmt2='##8' ;; + 16) fmt1="$BUFFER[first-1]"; fmt2='#16' ;; +esac + +local raw_result padded +# $(( )) outputs an error message to stderr when integer truncation occurs +printf -v raw_result "%0$ndigits$fmt1" $(( [$fmt2] "$base#$old" + delta )) 2> /dev/null +padded="${raw_result// /0}" +integer newnum="$base#$padded" 2> /dev/null + +# try to detect integer truncation +if (( base != 10 && newnum < 0 + || delta > 0 && newnum < oldnum + || delta < 0 && newnum > oldnum )); then + zle -M "[$WIDGET] The resulting number is either too big or too small." + return 1 +fi + +# adjust the number of leading zeros if the sign of the integer changed +local new +if (( base == 10 && ndigits == $#padded )); then + if (( oldnum < 0 && newnum >= 0 )); then + new="${padded#0}" + elif (( oldnum >= 0 && newnum < 0 )); then + new="-0${padded#-}" + fi +fi +if [[ -z "$new" ]]; then + new="$padded" +fi + +if zstyle -t ":zle:$WIDGET" debug; then + zle -M "[$WIDGET] base: $base delta: $delta old: '$old' new: '$new'" +fi + +if (( 0 < first && first <= last && last <= $#BUFFER )); then + BUFFER[first,last]="$new" +else + zle -M "[$WIDGET] The detected location of the integer was invalid. [location=BUFFER[$first,$last]]" + return 1 +fi + +integer offset=0 +if [[ "$WIDGET" == vi* ]]; then + offset=-1 +fi +(( CURSOR = last + $#BUFFER - oldlen + offset )) -BUFFER="$lrest$num$rrest" +return 0 |