oh-my-zsh/plugins/dirhistory/dirhistory.plugin.zsh

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