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#
# This is a handy replacement for ".widget cget" that requires neither tk4
# nor additional source code uglification.
#
proc cget { w option } {
        return "[lindex [$w configure $option] 4]"
}

#
# Function to compensate for broken config.in scripts like the sound driver,
# which make dependencies on variables that are never even conditionally
# defined.
#
proc vfix { var } {
        global $var
        if [ catch {eval concat $$var} ] {
                puts stdout "WARNING - broken Config.in!  $var was not declared!"
                set $var 0
        }
}

#
# Create a "reference" object to steal colors from.
#
button .ref
#
# On monochrome displays, -disabledforeground is blank by default; that's
# bad.  Fill it with -foreground instead.
#
if { [cget .ref -disabledforeground] == "" } {
        .ref configure -disabledforeground [cget .ref -foreground]
}


#
# Define some macros we will need to parse the config.in file.
#
proc mainmenu_name { text } {
        message .header.message -width 400 -relief raised -text "$text"
        pack .header.label .header.message -side left -padx 15
        wm title . "$text"
}

proc menu_option { w menu_num text } {
        button .f0.x$menu_num -text "$text" -width 50 -command "$w .$w \"$text\""
        pack .f0.x$menu_num -pady 1 -expand on
}

#
# Not used at the moment, but this runs a command in a subprocess and
# displays the result in a window with a scrollbar.
#
# For now, we just do external "make" commands to stdout with do_make, so
# this function is never called.
#
proc do_cmd { w command } {
        catch {destroy $w}
        toplevel $w -class Dialog
        frame $w.tb
        text $w.tb.text -relief raised -bd 2 -yscrollcommand "$w.tb.scroll set"
        scrollbar $w.tb.scroll -command "$w.tb.text yview"
        pack $w.tb.scroll -side right -fill y
        pack $w.tb.text -side left

        set oldFocus [focus]
        frame $w.back
        button $w.back.ok -text "OK" -width 20 \
                -command "destroy $w; focus $oldFocus" -state disabled
        button $w.back.ccl -text "Cancel" -width 20 \
                -command "destroy $w; focus $oldFocus"
        pack $w.tb -side top
        pack $w.back.ok $w.back.ccl -side left
        pack $w.back -side bottom -pady 10

        focus $w
        wm geometry $w +30+35

        $w.tb.text delete 1.0 end
        set f [open |$command]
        while {![eof $f]} {
                $w.tb.text insert end [read $f 256]
        }
        close $f
        $w.back.ok configure -state normal
}

proc load_configfile { w title func } {
        catch {destroy $w}
        toplevel $w -class Dialog
        global loadfile
        frame $w.x
        label $w.bm -bitmap questhead
        pack  $w.bm -pady 10 -side top -padx 10
        label $w.x.l -text "Enter filename:" -relief raised
        entry $w.x.x -width 35 -relief sunken -borderwidth 2 \
                -textvariable loadfile
        pack $w.x.l $w.x.x -anchor w -side left
        pack $w.x -side top -pady 10
        wm title $w "$title" 

        set oldFocus [focus]
        frame $w.f
        button $w.f.back -text "OK" -width 20 \
                -command "destroy $w; focus $oldFocus;$func .fileio"
        button $w.f.canc -text "Cancel" \
                -width 20 -command "destroy $w; focus $oldFocus"
        pack $w.f.back $w.f.canc -side left -pady 10 -padx 45
        pack $w.f -pady 10 -side bottom -padx 10 -anchor w
        focus $w
        global winx; global winy
        set winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]
        wm geometry $w +$winx+$winy
}

proc maybe_exit { w } {
        catch {destroy $w}
        toplevel $w -class Dialog
        label $w.bm -bitmap questhead
        pack  $w.bm -pady 10 -side top -padx 10
        message $w.m -width 400 -aspect 300 \
                -text "Changes will be lost.  Are you sure?" -relief flat
        pack  $w.m -pady 10 -side top -padx 10
        wm title $w "Are you sure?" 

        set oldFocus [focus]
        frame $w.f
        button $w.f.back -text "OK" -width 20 \
                -command "exit"
        button $w.f.canc -text "Cancel" \
                -width 20 -command "destroy $w; focus $oldFocus"
        pack $w.f.back $w.f.canc -side left -pady 10 -padx 45
        pack $w.f -pady 10 -side bottom -padx 10 -anchor w
        focus $w
        global winx; global winy
        set winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]
        wm geometry $w +$winx+$winy
}

proc read_config_file { w } {
        global loadfile
        if { [string length $loadfile] != 0 && [file readable $loadfile] == 1 } then {
                read_config $loadfile
        } else {
                catch {destroy $w}
                toplevel $w -class Dialog
                message $w.m -width 400 -aspect 300 -text \
                        "Unable to read file $loadfile" \
                         -relief raised 
                label $w.bm -bitmap error
                pack $w.bm $w.m -pady 10 -side top -padx 10
                wm title $w "Oops" 

                set oldFocus [focus]
                frame $w.f
                button $w.f.back -text "Bummer" \
                        -width 10 -command "destroy $w; focus $oldFocus"
                pack $w.f.back -side bottom -pady 10 -anchor s
                pack $w.f -pady 10 -side top -padx 10 -anchor s
                focus $w
                global winx; global winy
                set winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]
                wm geometry $w +$winx+$winy
        }
}

proc write_config_file  { w } {
        global loadfile
        if { [string length $loadfile] != 0 
                && ([file writable $loadfile] == 1 || ([file exists $loadfile] == 0 && [file writable [file dirname $loadfile]] == 1)) } then {
                writeconfig $loadfile /dev/null
        } else {
                catch {destroy $w}
                toplevel $w -class Dialog
                message $w.m -width 400 -aspect 300 -text \
                        "Unable to write file $loadfile" \
                         -relief raised 
                label $w.bm -bitmap error
                pack $w.bm $w.m -pady 10 -side top -padx 10
                wm title $w "Oops" 

                set oldFocus [focus]
                frame $w.f
                button $w.f.back -text "OK" \
                        -width 10 -command "destroy $w; focus $oldFocus"
                pack $w.f.back -side bottom -pady 10 -anchor s
                pack $w.f -pady 10 -side top -padx 10 -anchor s
                focus $w
                global winx; global winy
                set winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]
                wm geometry $w +$winx+$winy
        }
}

proc read_config { filename } {
        set file1 [open $filename r]
        clear_choices
        while { [gets $file1 line] >= 0} {
                if [regexp {([0-9A-Za-z_]+)=([ynm])} $line foo var value] {
                        if { $value == "y" } then { set cmd "global $var; set $var 1" }
                        if { $value == "n" } then { set cmd "global $var; set $var 0" }
                        if { $value == "m" } then { set cmd "global $var; set $var 2" }
                        eval $cmd
                }
                if [regexp {# ([0-9A-Za-z_]+) is not set} $line foo var] {
                        set cmd "global $var; set $var 0"
                        eval $cmd
                }
                if [regexp {([0-9A-Za-z_]+)=([0-9A-Fa-f]+)} $line foo var value] {
                        set cmd "global $var; set $var $value"
                        eval $cmd
                }
        }
        close $file1
        update_choices
        update_mainmenu .rdupd
}
proc write_comment { file1 file2 text } {
        puts $file1 ""
        puts $file1 "#"
        puts $file1 "# $text"
        puts $file1 "#"
        puts $file2 "/*"
        puts $file2 " * $text"
        puts $file2 " */"
}

proc write_tristate { file1 file2 varname variable dep } {
        if { $variable == 0 } \
                then { puts $file1 "# $varname is not set"; \
                       puts $file2 "#undef $varname"} \
        elseif { $variable == 2 || ($dep == 2 && $variable == 1) } \
                then { puts $file1 "$varname=m"; \
                       puts $file2 "#undef $varname"; \
                       puts $file2 "#define ${varname}_MODULE 1" } \
        elseif { $variable == 1 && $dep != 2 } \
                then { puts $file1 "$varname=y"; \
                       puts $file2 "#define $varname 1" } \
        else { \
            error "Attempting to write value for variable that is not configured ($varname)." \
        }
}

proc write_int { file1 file2 varname variable dep } {
        if { $dep == 0 } \
                then { puts $file1 "# $varname is not set"; \
                       puts $file2 "#undef $varname"} \
        else {
                puts $file1 "$varname=$variable"; \
                puts $file2 "#define $varname $variable"; \
        }
}

proc write_hex { file1 file2 varname variable dep } {
        if { $dep == 0 } \
                then { puts $file1 "# $varname is not set"; \
                       puts $file2 "#undef $varname"} \
        else {
                puts $file1 "$varname=$variable"; \
                puts $file2 "#define $varname 0x$variable"; \
        }
}

proc option_name {w mnum line text helpidx} {
        button $w.x$line.l -text "$text" -relief groove -anchor w
        $w.x$line.l configure -activefore [cget $w.x$line.l -fg] \
                                -activeback [cget $w.x$line.l -bg]
        button $w.x$line.help -text "Help" -relief raised \
                -command "dohelp .dohelp $helpidx"
        pack $w.x$line.help -side right -fill y
        pack $w.x$line.l -side right -fill both -expand on
}

proc toggle_switch {w mnum line text variable} {
        frame $w.x$line -relief sunken
        radiobutton $w.x$line.y -text "y" -variable $variable -value 1 \
                -relief groove -width 2 -command "update_menu$mnum .menu$mnum"
        radiobutton $w.x$line.m -text "m"  -variable $variable -value 2 \
                -relief groove -width 2 -command "update_menu$mnum .menu$mnum"
        radiobutton $w.x$line.n -text "n"  -variable $variable -value 0 \
                -relief groove -width 2 -command "update_menu$mnum .menu$mnum"
                
        option_name $w $mnum $line $text $variable
                
        pack $w.x$line.n $w.x$line.m $w.x$line.y -side right -fill y
}

proc bool {w mnum line text variable} {
        toggle_switch $w $mnum $line $text $variable
        $w.x$line.m configure -state disabled
        pack $w.x$line -anchor w -fill both -expand on
}

proc tristate {w mnum line text variable } {
        toggle_switch $w $mnum $line $text $variable
        pack $w.x$line -anchor w -fill both -expand on
}

proc dep_tristate {w mnum line text variable depend } {
        tristate $w $mnum $line $text $variable
}

proc int { w mnum line text variable } {
        frame $w.x$line
        entry $w.x$line.x -width 18 -relief sunken -borderwidth 2 \
                -textvariable $variable
        option_name $w $mnum $line $text $variable
        pack $w.x$line.x -anchor w -side right -fill y
        pack $w.x$line -anchor w -fill both -expand on
}

proc hex { w mnum line text variable } {
        int $w $mnum $line $text $variable
}

proc minimenu { w mnum line text variable helpidx } {
        frame $w.x$line
        menubutton $w.x$line.x -textvariable $variable -menu \
                $w.x$line.x.menu -relief raised \
                -width 15 -anchor w
        option_name $w $mnum $line $text $helpidx
        pack $w.x$line.x -anchor w -side right -fill y
        pack $w.x$line -anchor w -fill both -expand on
}

proc comment {w line text } {
#nothing done for comments now.
}

proc do_make { command } {
        exec sh -c $command <@stdin >@stdout 2>@stderr
#       do_cmd .make_window "sh -c $command"
}

proc dohelp {w var }  {
        catch {destroy $w}
        toplevel $w -class Dialog

        set filefound 0
        set found 0
        set lineno 0

        if { [file readable Documentation/Configure.help] == 1} then {
                set filefound 1
                set message [exec sed -n "
                        /^$var\[        \]*\$/,\${
                                /^$var\[        \]*\$/c\\
${var}:\\

                                /^#.*/d
                                /^\[    \]*\$/bL
                                H
                        }
                        d
                        :L x
                        s/\\n  //
                        s/\\n  / /g
                        p
                        q
                        " Documentation/Configure.help]
                set found [expr [string length "$message"] > 0]
        }
        
        frame $w.f1

        if { $found == 0 } then {
                if { $filefound == 0 } then {
                message $w.f1.m -width 750 -aspect 300 -relief flat -text \
                        "No help available - unable to open file Documentation/Configure.help.  This file should have come with your kernel."
                } else {
                message $w.f1.m -width 400 -aspect 300 -relief flat -text \
                        "No help available for $var"
                }
                label $w.f1.bm -bitmap error
                wm title $w "RTFM"
        } else {
                message $w.f1.m -width 400 -aspect 300 -text $message \
                         -relief flat
                label $w.f1.bm -bitmap info
                wm title $w "Configuration help" 
        }
        pack $w.f1.bm $w.f1.m -side left -padx 10
        pack $w.f1 -side top
        set oldFocus [focus]
        
        # Do the OK button
        #
        frame $w.f2
        button $w.f2.ok -text "OK" \
                -width 10 -command "destroy $w; focus $oldFocus"
        pack $w.f2.ok -side bottom -pady 10 -anchor s
        pack $w.f2 -side bottom -padx 10 -anchor s

        # Finish off the window
        #
        focus $w
        global winx; global winy
        set winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]
        wm geometry $w +$winx+$winy
}

proc wrapup {w }  {
        catch {destroy $w}
        toplevel $w -class Dialog
        message $w.m -width 400 -aspect 300 -text \
                "The linux kernel is now hopefully configured for your setup. Check the top-level Makefile for additional configuration, and do a 'make dep ; make clean' if you want to be sure all the files are correctly re-made."  -relief raised 
        label $w.bm -bitmap info
        pack $w.bm $w.m -pady 10 -side top -padx 10
        wm title $w "Kernel build instructions" 

        set oldFocus [focus]
        frame $w.f
        button $w.f.back -text "OK" \
                -width 10 -command "exit"
        pack $w.f.back -side bottom -pady 10 -anchor s
        pack $w.f -pady 10 -side top -padx 10 -anchor s
        focus $w
        global winx; global winy
        set winx [expr [winfo x .]+30]; set winy [expr [winfo y .]+30]
        wm geometry $w +$winx+$winy

}

proc check_sound_config { num } {
#nothing for now.
}

proc do_sound {w mnum line} {
        message $w.x$line -width 400 -aspect 300 -text "Note: The sound drivers cannot as of yet be configured via the X-based interface" -relief raised
        pack $w.x$line -side top -pady 10
}

#
# Next set up the particulars for the top level menu, and define a few
# buttons which we will stick down at the bottom.
#
frame .header
label .header.label 

frame .f0