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plugins/dirhistory/dirhistory.plugin.zsh 3.08 KB
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093a6c34b   mj   Squashed 'repos/r... 
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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
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  chpwd_functions+=(chpwd_dirhistory)
  function chpwd_dirhistory() {
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    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