mirror of
git://git.code.sf.net/p/zsh/code
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84 lines
2.7 KiB
Text
84 lines
2.7 KiB
Text
# Take an expression suitable for interpolation in double quotes that
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# performs a replacement on the parameter "ARG". Replaces the
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# shell argument (which may be a quoted string) under or before the
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# cursor with that. Ensure the expression is suitable quoted.
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#
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# For example, to uppercase the entire shell argument:
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# modify-current-argument '${(U)ARG}'
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# To strip the current quoting from the word (whether backslashes or
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# single, double or dollar quotes) and use single quotes instead:
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# modify-current-argument '${(qq)${(Q)ARG}}'
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# Retain most options from the calling function for the eval.
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# Reset some that might confuse things.
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setopt localoptions noksharrays multibyte
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local -a reply
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integer posword poschar fromend endoffset
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local REPLY REPLY2
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autoload -Uz split-shell-arguments
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split-shell-arguments
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(( posword = REPLY, poschar = REPLY2 ))
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# Can't do this unless there's some text under or left of us.
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(( posword < 2 )) && return 1
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# Get the index of the word we want.
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if (( posword & 1 )); then
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# Odd position; need previous word.
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(( posword-- ))
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# Pretend position was just after the end of it.
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(( poschar = ${#reply[posword]} + 1 ))
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fi
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# Work out offset from end of string
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(( fromend = $poschar - ${#reply[posword]} - 1 ))
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if (( fromend >= -1 )); then
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# Cursor is near the end of the word, we'll try to keep it there.
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endoffset=1
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fi
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# Length of all characters before current.
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# Force use of character (not index) counting and join without IFS.
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integer wordoff="${(cj..)#reply[1,posword-1]}"
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# Replacement for current word. This could do anything to ${reply[posword]}.
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local ARG="${reply[posword]}" repl
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if [[ $1 != *ARG* ]]; then
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REPLY=
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$1 $ARG || return 1
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repl=$REPLY
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else
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eval repl=\"$1\"
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fi
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if (( !endoffset )) && [[ ${repl[fromend,-1]} = ${ARG[fromend,-1]} ]]; then
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# If the part of the string from here to the end hasn't changed,
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# leave the cursor this distance from the end instead of the beginning.
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endoffset=1
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fi
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# New line: all words before and after current word, with
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# no additional spaces since we've already got the whitespace
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# and the replacement word in the middle.
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local left="${(j..)reply[1,posword-1]}${repl}"
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local right="${(j..)reply[posword+1,-1]}"
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if [[ endoffset -ne 0 && ${#repl} -ne 0 ]]; then
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# Place cursor relative to end.
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LBUFFER="$left"
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RBUFFER="$right"
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(( CURSOR += fromend ))
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else
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BUFFER="$left$right"
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# Keep cursor at same position in replaced word.
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# Redundant here, but useful if $repl changes the length.
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# Limit to the next position after the end of the word.
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integer repmax=$(( ${#repl} + 1 ))
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# Remember CURSOR starts from offset 0 for some reason, so
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# subtract 1 from positions.
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(( CURSOR = wordoff + (poschar > repmax ? repmax : poschar) - 1 ))
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fi
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