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#compdef curl

# Usage: _urls [-f]
# Options:
#  -f : complete files first.
#
# Configuration styles used:
#
#  path
#    The path to a directory containing a URL database, such as:
#
#      % cd ~/.zsh/urls
#      % find . -ls
#      ... drwxr-xr-x ... 512 Sep  3 02:46 .
#      ... drwxr-xr-x ... 512 Sep  3 02:48 ./http
#      ... drwxr-xr-x ... 512 Sep  3 02:52 ./http/www.zsh.org
#      ... drwxr-xr-x ... 512 Sep  3 03:01 ./http/www.zsh.org/mla
#      ... drwxr-xr-x ... 512 Sep  3 03:01 ./http/www.zsh.org/mla/workers
#      ... drwxr-xr-x ... 512 Sep  3 03:01 ./http/www.zsh.org/mla/workers/1999
#      ... -rw-r--r-- ...   0 Sep  3 03:01 ./http/www.zsh.org/mla/workers/1999/index.html
#      ... drwxr-xr-x ... 512 Sep  3 02:48 ./http/sunsite.auc.dk
#      ... drwxr-xr-x ... 512 Sep  3 02:48 ./http/sunsite.auc.dk/zsh
#      ... drwxr-xr-x ... 512 Sep  3 02:47 ./bookmark
#      ... drwxr-xr-x ... 512 Sep  3 02:48 ./bookmark/zsh
#      ... -rw-r--r-- ...  27 Sep  3 02:47 ./bookmark/zsh/home
#      ... -rw-r--r-- ...  20 Sep  3 02:48 ./bookmark/zsh/meta
#      % cat bookmark/zsh/home 
#      http://sunsite.auc.dk/zsh/
#      % cat bookmark/zsh/meta
#      http://www.zsh.org/
#
#  local
#    Specify a local web server as an array with three elements:
#      <hostname> <doc root> <user area>
#    where hostname is the name of the web server, doc root is the path to
#    the default web pages for the server and user area is the directory
#    name used by a user placing web pages within their home area.
#    E.g.:
#      zstyle ':completion:*:urls' local www /usr/local/apache/htdocs public_html

local ipre scheme host user uhosts ret=1 expl
local urls_path localhttp
zstyle -s ":completion:${curcontext}:urls" path urls_path ||
    urls_path="${ZDOTDIR:-$HOME}/.zsh/urls"
zstyle -a ":completion:${curcontext}:urls" local localhttp
local localhttp_servername="$localhttp[1]"
local localhttp_documentroot="$localhttp[2]"
local localhttp_userdir="$localhttp[3]"

if [[ "$1" = -f ]]; then
  shift
  _tags -C -f files && _files "$@" && return
fi

ipre="$IPREFIX"

if ! compset -P '(#b)([-+.a-z0-9]#):' &&
   _wanted -C argument prefixes expl 'URL prefix'; then
  [[ -d $urls_path/bookmark ]] &&
    compadd "$@" "$expl[@]" -S '' bookmark: && ret=0
  compadd "$@" "$expl[@]" -S '' file: ftp:// gopher:// http:// && ret=0
  return ret
fi
scheme="$match[1]"

case "$scheme" in
  http|ftp|gopher)
    if ! compset -P //; then
      _wanted -C "$scheme" prefixes expl 'end of prefix' &&
          compadd "$expl[@]" "$@" -S '' //
      return
    fi
  ;;
  file)
    if ! compset -P //; then
      _wanted -C file files expl 'local file' || return 1

      if [[ -prefix / ]]; then
	_path_files "$expl[@]" "$@" -S '' -g '*(^/)' && ret=0
	_path_files "$expl[@]" "$@" -S/ -r '/' -/ && ret=0
      elif [[ -z "$PREFIX" ]]; then
	compadd "$expl[@]" -S '/' -r '/' - "${PWD%/}" && ret=0
      fi
      return ret
    fi
  ;;
  bookmark)
    if [[ -f "$urls_path/$scheme/${(Q)PREFIX}${(Q)SUFFIX}" &&
	  -s "$urls_path/$scheme/${(Q)PREFIX}${(Q)SUFFIX}" ]]; then
      _wanted -C bookmark bookmarks expl bookmarks &&
          compadd "$expl[@]" "$@" -U - \
              "$ipre$(<"$urls_path/$scheme/${(Q)PREFIX}${(Q)SUFFIX}")" && ret=0
    else
      if _wanted -C bookmark files expl 'bookmark'; then
        _path_files -W "$urls_path/$scheme" "$expl[@]" -S '' -g '*(^/)' && 
            ret=0
        _path_files -W "$urls_path/$scheme" -S/ -r '/' -/ && ret=0
      fi
    fi
    return ret
  ;;
esac

# Complete hosts
if ! compset -P '(#b)([^/]#)/' &&
   _wanted hosts expl host; then
  uhosts=($urls_path/$scheme/$PREFIX*$SUFFIX(/:t))
  (( $#uhosts )) || _hosts -S/ && ret=0
  [[ "$scheme" = http ]] && uhosts=($uhosts $localhttp_servername)
  compadd "$expl[@]" "$@" -S/ - $uhosts && ret=0
  return ret
fi
host="$match[1]"

# Complete part after hostname

_wanted -C local files expl 'local file' || return 1

if [[ "$localhttp_servername" = "$host" ]]; then
  if compset -P \~; then
    if ! compset -P '(#b)([^/]#)/'; then
      _users -S/
      return
    fi
    user="$match[1]"
    _path_files "$expl[@]" -W ~$user/$localhttp_userdir -g '*(^/)' && ret=0
    _path_files "$expl[@]" -W ~$user/$localhttp_userdir -S/ -r '/' -/ && ret=0
  else
    _path_files "$expl[@]" -W $localhttp_documentroot -g '*(^/)' && ret=0
    _path_files "$expl[@]" -W $localhttp_documentroot -S/ -r '/' -/ && ret=0
  fi
else
  _path_files "$expl[@]" -W $urls_path/$scheme/$host -g '*(^/)' && ret=0
  _path_files "$expl[@]" -W $urls_path/$scheme/$host -S/ -r '/' -/ && ret=0
fi
return $ret