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Added dirhistory plugin.

This plugin navigates directory history using ALT-LEFT and ALT-RIGHT.
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commit c0b98cd6aca5b6148a5ee147b087772bfb9f5e21 1 parent 6b3c953
@jeffwilliams jeffwilliams authored
Showing with 132 additions and 0 deletions.
  1. +132 −0 plugins/dirhistory/dirhistory.plugin.zsh
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132 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
+
+
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