#!/bin/sh
# $Id: surfraw.in,v 1.3 2001/10/25 00:04:43 proff Exp $
# Surfraw -- Shell Users' Revolutionary Front Against the World wide web
#
# (c) 2000-2001 Julian Assange, placed into the public domain
# (c) 2000 Melbourne Institute for Advanced Study, placed into the public domain
#
# see the file COPYING for further copyright details
#
# @configure_input@

surfraw_version=@VERSION@
surfraw_api_version=1.0
w3_argv0=`basename "$0"`

# defaults

w3_config_hook () {
    return 1
}

w3_config () {
prefix=@prefix@
def   SURFRAW_global_conf	@sysconfdir@/surfraw.conf
def   SURFRAW_conf		$HOME/.surfraw.conf

    test -e "$SURFRAW_global_conf" || err "couldn't source SURFRAW_global_conf ($SURFRAW_global_conf)"
    . "$SURFRAW_global_conf"
    w3_config_hook
    test -e "$SURFRAW_conf" && . "$SURFRAW_conf"
}

warn () {
    echo "$w3_argv0 WARNING: ""$@"
}

err () {
    echo "$w3_argv0 ERROR: ""$@"
    exit 1
}

yesno () {
    eval value=\$${1}
    case "$value" in
	# "yes", "true", "on", or "1"
	[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
	    return 0
        ;;
        # "no", "false", "off", or "0"
        [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
	    return 1
        ;;

        *)
        err "\"$1\" is not set correctly. Should be (yes|on|1|no|off|0). Is \"$value\""
        ;;
    esac
}

ifyes () {
    yesno "$@" && return 0
    return 1
}

ifno () {
    yesno "$@" && return 1
    return 0
}

ok () {
    yesno "$@"
}

null () {
    test -z "$@" && return 0
    return 1
}

def () {
    eval value=\$${1}
    test -z "$value" || return 0
    eval ${1}="$2"
    return 0
}

defyn () {
    eval value=\$${1}
    test -z "$value" && eval ${1}="$2"
    yesno "$1"
}

setopt  () {
    eval value=\$${1}
    eval ${1}="$2"
}

setoptyn () {
    eval value=\$${1}
    eval ${1}="$2"
    yesno "$1"
}

w3_find_prog () {
  prog="$1"
  old_ifs="${IFS:-\" \"}"
  IFS=":"
  path_ifs="$PATH"
  for dir in $path_ifs; do
    test -z "$dir" && dir=.
    if test -e "$dir/$prog"; then
	echo "$dir/$prog"
	IFS="$old_ifs"
	return 0
    fi
  done
  IFS="$old_ifs"
  return 1
}

w3_url_escape () {
    echo "$@" | sed 's/%/%25/g;
		     s/+/%2B/g;
#		     s/ /+/g;
		     s/ /%20/g;
		     s/"/%22/g;
		     s/#/%23/g;
		     s/\$/%24/g;
		     s/&/%26/g;
		     s/,/%2C/g;
		     s/\./%2E/g;
		     sx/x%2Fx;
		     s/:/%3A/g;
		     s/;/%3B/g;
		     s/</%3C/g;
		     s/=/%3D/g;
		     s/>/%3E/g;
		     s/?/%3F/g;
		     s/@/%40/g;
		     s/\[/%5B/g;
		     s/\\/%74/g;
		     s/\]/%5D/g;
		     s/\^/%5E/g;
		     s/{/%7B/g;
		     s/|/%7C/g;
		     s/}/%7D/g;
		     s/~/%7E/g;
		   '"s/'/%60/g"
}

w3_url_of_arg () {
    if ok SURFRAW_quote_args; then
        args=\""$@"\"
    else
        args="$@"
    fi
    if ok SURFRAW_escape_url_args; then
	w3_url_escape "$args"
    else
	echo "$@"
    fi
}

true () {
    return 0
}

false () {
    return 1
}

w3_global_usage () {
# style: keep sorted
#-------------------------------------79 cols----------------------------------
    cat <<EOF
Global options:
  -browser=EXECUTABLE		Set browser
				Default: $SURFRAW_browser
  -elvi				List Surfraw mechanims for conquering evil
  -escape-url-args=yes|no	Apply url escaping to arguments
				Default: $SURFRAW_escape_url_args
				Environment: SURFRAW_escape_url_args
  -g | -graphical		Get some windowed sin
  -p0rn=yes|no			Yes, yes, harder, deeper, faster, oh baybe
				Default: $SURFRAW_p0rn
				Environment: SURFRAW_p0rn
  -help				What you're reading now, dude
  -quiet=yes|no			I can't enjoy it with you talking all the time
				Default: $SURFRAW_quiet
				Environment: SURFRAW_quiet
  -new[=yes|no]			Start in a new window
				Default: $SURFRAW_new_window
				Environment: SURFRAW_new_window
  -t | -text			Back to the yellow brick road
  -q | -quote			Quote arguments with " characters
				Default: $SURFRAW_quote_args
				Environment: SURFRAW_quote_args
  -version			Display Surfraw version ($surfraw_version)
Copyright:
  Copyright (c) 2000-2001 Julian Assange <proff@iq.org>
  Copyright (c) 2001 Australian Institute for Collaborative Research
  Copyright (c) 2000 Melbourne Institute for Advanced Study
EOF
}

w3_usage_hook () {
    echo "Usage: $w3_argv0 [options] [args...]"
    w3_global_usage
}

w3_bad_option () {
    err "bad option \"${opt}\". Try ${w3_argv0} -help for usage information"
}

w3_parse_option_hook () {
    return 1
}

w3_parse_option () {
    opt="$1"
    case "$opt" in
	    -*=*) optarg=`echo "$opt" | sed 's/[-_a-zA-Z0-9]*=//'`
    esac
    w3_parse_option_hook "$opt" "$optarg" && return 0
    
    case "$opt" in
	-browser=*)	    setopt   SURFRAW_browser		$optarg	;;
	-elvi)		    cat "$SURFRAW_elvi_list"; exit 0            ;;
	-escape-url-args=*) setoptyn SURFRAW_escape_url_args	$optarg ;;
	-g | -graphical)    setoptyn SURFRAW_graphical		yes	;;
	-p0rn=*)	    setoptyn SURFRAW_p0rn	    	$optarg ;;
	-help | --help)     do_help=1					;;
	-quiet=*)	    setoptyn SURFRAW_quiet	    	$optarg ;;
	-q | -quote)	    setoptyn SURFRAW_quote_args	    	yes	;;
	-new)		    setoptyn SURFRAW_new_window		yes	;;
	-new=*)		    setoptyn SURFRAW_new_window		$optarg ;;
	-t | -text)	    setoptyn SURFRAW_graphical 		no	;;
	-version)	    echo $surfraw_version; exit 0	    	;;
	--)		    return 1					;;
	-*)		    w3_bad_option "$opt"		    	;;
	*)		    return 1					;;
    esac
    return 0
}

w3_parse_args () {
    w3_args=
    SURFRAW_browser=none
    SURFRAW_browser_args=none
    do_help=0
    for arg in "$@"; do
	w3_parse_option "$arg" || w3_args="$w3_args $arg"
    done
    if test $SURFRAW_browser = none; then
	if ok SURFRAW_graphical; then
		SURFRAW_browser=$SURFRAW_graphical_browser
		SURFRAW_browser_args=$SURFRAW_graphical_browser_args
	else
		SURFRAW_browser=$SURFRAW_text_browser
		SURFRAW_browser_args=$SURFRAW_text_browser_args
	fi
    fi
    if ok do_help; then
	w3_usage_hook
	exit 0
    fi
}

w3_browse_url () {
   if ok SURFRAW_new_screen && ! test -z "$STY" && ! ok SURFRAW_graphical; then
   	screen=yes
   else
   	screen=no
   fi
    if ok screen; then
	if test $SURFRAW_browser_args = "none"; then
		$SURFRAW_screen $SURFRAW_browser "$@"
	else
		$SURFRAW_screen $SURFRAW_browser $SURFRAW_browser_args "$@"
	fi
    else
	if ok SURFRAW_graphical_remote && ok SURFRAW_graphical; then
		if ok SURFRAW_new_window; then 
			newwin=", new-window"
		else
			newwin=""
		fi
		if test $SURFRAW_browser_args = "none"; then
			$SURFRAW_browser -remote "openURL($*$newwin)" 2>/dev/null || $SURFRAW_browser "$@" &
		else
			$SURFRAW_browser -remote "openURL($*$newwin)" 2>/dev/null || $SURFRAW_browser $SURFRAW_browser_args "$@" &
		fi
	else
		if test $SURFRAW_browser_args = "none"; then
			$SURFRAW_browser "$@"
		else
			$SURFRAW_browser $SURFRAW_browser_args "$@"
		 fi
	fi
		
    fi
#    ifno SURFRAW_quiet && echo "Thank you for supporting the Shell Users' Revolutionary Front Rage Against the Web"
}

case "$w3_argv0" in
    surfraw) 
        w3_config
	w3_parse_option -elvi ;;
esac