#
# $RCSfile: init.itcl,v $ --
#
#      This file contains some initialization code for PWgui.
#
# Copyright (c) 2004  Anton Kokalj   Email: tone.kokalj@ijs.si
#
#
# This file is distributed under the terms of the GNU General Public
# License. See the file `LICENCE' in the root directory of the present
# distribution, or http://www.gnu.org/copyleft/gpl.txt .
#
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
# ANTON KOKALJ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
#
# $Id: init.itcl,v 1.1 2004-02-23 12:19:48 kokalj Exp $ 
#

proc ::pwscf::init {} {
    variable settings
    global env

    # check if settings(EDITOR) is OK 
    checkCmd settings(EDITOR)   
    # check for vi & vim, i.e, "xterm -e vi"
    foreach editor {vi vim} {
	if { [string match "* $editor" $settings(EDITOR)] } {
	    # check if "less" cmd exists
	    if { [auto_execok $editor] == "" } {
		set settings(PAGER) PWgui
	    }
	}
    }

    # check if settings(PAGER) is OK
    checkCmd settings(PAGER)
    # check for less, i.e, "xterm -e less"
    if { [string match {* less} $settings(PAGER)] } {
	# check if "less" cmd exists
	if { [auto_execok less] == "" } {
	    set settings(PAGER) PWgui
	}
    }
}


proc ::pwscf::checkCmd {varName} {
    upvar $varName var
    
    if { [string match -nocase "PWgui" $var] } {
	if { [llength $var] > 1 } {
	    set editor [lindex $var 0]
	} else {
	    set editor $var
	}
	if { [auto_execok $var] == "" } {
	    # there is no $var command, revert to internal-editor
	    set var PWgui
	}
    }
}