134 lines
3.1 KiB
Bash
134 lines
3.1 KiB
Bash
##
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# Navigate directory history using ALT-LEFT and ALT-RIGHT. ALT-LEFT moves back to directories
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# that the user has changed to in the past, and ALT-RIGHT undoes ALT-LEFT.
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#
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dirhistory_past=($PWD)
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dirhistory_future=()
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export dirhistory_past
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export dirhistory_future
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export DIRHISTORY_SIZE=30
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# Pop the last element of dirhistory_past.
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# Pass the name of the variable to return the result in.
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# Returns the element if the array was not empty,
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# otherwise returns empty string.
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function pop_past() {
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eval "$1='$dirhistory_past[$#dirhistory_past]'"
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if [[ $#dirhistory_past -gt 0 ]]; then
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dirhistory_past[$#dirhistory_past]=()
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fi
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}
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function pop_future() {
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eval "$1='$dirhistory_future[$#dirhistory_future]'"
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if [[ $#dirhistory_future -gt 0 ]]; then
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dirhistory_future[$#dirhistory_future]=()
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fi
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}
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# Push a new element onto the end of dirhistory_past. If the size of the array
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# is >= DIRHISTORY_SIZE, the array is shifted
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function push_past() {
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if [[ $#dirhistory_past -ge $DIRHISTORY_SIZE ]]; then
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shift dirhistory_past
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fi
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if [[ $#dirhistory_past -eq 0 || $dirhistory_past[$#dirhistory_past] != "$1" ]]; then
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dirhistory_past+=($1)
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fi
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}
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function push_future() {
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if [[ $#dirhistory_future -ge $DIRHISTORY_SIZE ]]; then
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shift dirhistory_future
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fi
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if [[ $#dirhistory_future -eq 0 || $dirhistory_futuret[$#dirhistory_future] != "$1" ]]; then
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dirhistory_future+=($1)
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fi
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}
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# Called by zsh when directory changes
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chpwd_functions+=(chpwd_dirhistory)
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function chpwd_dirhistory() {
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push_past $PWD
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# If DIRHISTORY_CD is not set...
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if [[ -z "${DIRHISTORY_CD+x}" ]]; then
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# ... clear future.
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dirhistory_future=()
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fi
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}
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function dirhistory_cd(){
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DIRHISTORY_CD="1"
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cd $1
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unset DIRHISTORY_CD
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}
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# Move backward in directory history
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function dirhistory_back() {
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local cw=""
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local d=""
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# Last element in dirhistory_past is the cwd.
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pop_past cw
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if [[ "" == "$cw" ]]; then
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# Someone overwrote our variable. Recover it.
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dirhistory_past=($PWD)
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return
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fi
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pop_past d
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if [[ "" != "$d" ]]; then
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dirhistory_cd $d
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push_future $cw
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else
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push_past $cw
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fi
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}
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# Move forward in directory history
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function dirhistory_forward() {
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local d=""
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pop_future d
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if [[ "" != "$d" ]]; then
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dirhistory_cd $d
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push_past $d
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fi
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}
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# Bind keys to history navigation
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function dirhistory_zle_dirhistory_back() {
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# Erase current line in buffer
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zle kill-buffer
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dirhistory_back
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zle accept-line
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}
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function dirhistory_zle_dirhistory_future() {
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# Erase current line in buffer
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zle kill-buffer
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dirhistory_forward
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zle accept-line
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}
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zle -N dirhistory_zle_dirhistory_back
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# xterm in normal mode
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bindkey "\e[3D" dirhistory_zle_dirhistory_back
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bindkey "\e[1;3D" dirhistory_zle_dirhistory_back
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# Putty:
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bindkey "\e\e[D" dirhistory_zle_dirhistory_back
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# GNU screen:
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bindkey "\eO3D" dirhistory_zle_dirhistory_back
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zle -N dirhistory_zle_dirhistory_future
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bindkey "\e[3C" dirhistory_zle_dirhistory_future
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bindkey "\e[1;3C" dirhistory_zle_dirhistory_future
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bindkey "\e\e[C" dirhistory_zle_dirhistory_future
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bindkey "\eO3C" dirhistory_zle_dirhistory_future
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