/usr/lib/erlang/lib/gs-1.6.2/priv/gstk.tcl is in erlang-gs 1:19.2.1+dfsg-2+deb9u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Some tcl scripts used from erlang
# By Ola Samuelsson in May 1995
# © Ericsson Software Technology / Erlang System
# ------------------------------------------------------------
package require Tk 8.3
# Scrolled object.
# This is a script that creates a
# scrolled object of specified type
# and connects it with scrollbars.
#
# Give a name for the frame and you'll find
# name.z,
# name.sy,
# name.pad.sx
# name.pad.it
#
proc so_create {type w} {
set parent [frame $w]
eval {$type $parent.z -highlightt 0}
$parent.z config -yscrollcommand [list $parent.sy set] \
-xscrollcommand [list $parent.pad.sx set]
scrollbar $parent.sy -orient vertical -takefocus 0 \
-command [list $parent.z yview]
# create extra frame to hold pad
frame $parent.pad
scrollbar $parent.pad.sx -orient horizontal -takefocus 0 \
-command [list $parent.z xview]
#create padding based on the scrollbars width
set pad [expr [$parent.sy cget -width] + 2 * \
([$parent.sy cget -bd] + \
[$parent.sy cget -highlightthickness])]
frame $parent.pad.it -width $pad -height $pad
# Arrange everything
so_plain $parent
return $parent
}
proc so_top_right {w} {
so_unpack $w
pack $w.pad -side top -fill x
pack $w.pad.it -side right
pack $w.pad.sx -side top -fill x
pack $w.sy -side right -fill y
pack $w.z -side left -fill both -expand true
}
proc so_top_left {w} {
so_unpack $w
pack $w.pad -side top -fill x
pack $w.pad.it -side left
pack $w.pad.sx -side top -fill x
pack $w.sy -side left -fill y
pack $w.z -side right -fill both -expand true
}
proc so_bottom_right {w} {
so_unpack $w
pack $w.pad -side bottom -fill x
pack $w.pad.it -side right
pack $w.pad.sx -side bottom -fill x
pack $w.sy -side right -fill y
pack $w.z -side left -fill both -expand true
}
proc so_bottom_left {w} {
so_unpack $w
pack $w.pad -side bottom -fill x
pack $w.pad.it -side left
pack $w.pad.sx -side bottom -fill x
pack $w.sy -side left -fill y
pack $w.z -side right -fill both -expand true
}
proc so_bottom {w} {
so_unpack $w
pack $w.pad -side bottom -fill x
pack $w.pad.sx -side bottom -fill x
pack $w.z -side left -fill both -expand true
}
proc so_top {w} {
so_unpack $w
pack $w.pad -side top -fill x
pack $w.pad.sx -side top -fill x
pack $w.z -side left -fill both -expand true
}
proc so_right {w} {
so_unpack $w
pack $w.sy -side right -fill y
pack $w.z -side left -fill both -expand true
}
proc so_left {w} {
so_unpack $w
pack $w.sy -side left -fill y
pack $w.z -side right -fill both -expand true
}
proc so_plain {w} {
so_unpack $w
pack $w.z -side left -fill both -expand true
}
proc so_unpack {w} {
pack forget $w.pad.it
pack forget $w.pad.sx
pack forget $w.pad
pack forget $w.sy
pack forget $w.z
}
# ------------------------------------------------------------
# editor stuff
proc ed_load {w file} {
if [catch {open $file r} fileId] {
report "$fileId"
return -code error
} else {
$w delete 1.0 end
while {![eof $fileId]} {
$w insert end [read $fileId 1000]
}
close $fileId
}
}
proc ed_save {w file} {
if [catch {open $file w} fileId] {
report "$fileId"
return -code error
} else {
puts -nonewline $fileId [$w get 1.0 end]
close $fileId
}
}
# returns rect1 text1 rect2 text2 ...
proc mkgrid {canvas colws startrow endrow height font fg bg} {
set res [list]
set ncols [llength $colws]
set y [expr ($startrow-1)*$height+$startrow]
for {set row $startrow} {$row <= $endrow} {incr row} {
set x 1
for {set col 0} {$col < $ncols} {incr col} {
set colw [lindex $colws $col]
# each object is tagged q<columnNo>
# is this (ugly) way we can find to what column an object belongs
# even later...
set r [$canvas create re $x $y [expr $x+$colw] [expr $y+$height]\
-f $bg -outline $fg -tag "q$col"]
set t [$canvas create te [expr $x+2] [expr $y+2]\
-anch nw -fo $font -fi $fg -tag "q$col"]
$canvas raise $t
lappend res $r $t
set x [expr $x+$colw+1]
}
set y [expr $y+$height+1]
}
return $res
}
# new x values
proc calc_new_xs {colws} {
set ncols [llength $colws]
set res [list]
set x 1
for {set col 0} {$col < $ncols} {incr col} {
lappend res $x
set x [expr $x+1+[lindex $colws $col]]
}
lappend res $x
return $res
}
proc resize_grid_cols {canvas colws} {
set item 1
set xs [calc_new_xs $colws]
while {[set nbr_of_coords\
[llength [set coords [$canvas coords $item]]]] > 0} {
set tags [$canvas itemcget $item -tag]
set first [string first "q" $tags]
# find the column of the current object by
# searching for the q tag.
set col [string range $tags [expr 1 + $first]\
[expr [string wordend $tags $first] -1]]
switch $nbr_of_coords {
2 { # a text object
set y [lindex $coords 1]
set newx [expr [lindex $xs $col] + 2]
$canvas coords $item $newx $y
}
4 { # a rectangle object
set y1 [lindex $coords 1]
set y2 [lindex $coords 3]
set newx1 [lindex $xs $col]
set newx2 [expr [lindex $xs [expr $col + 1]]-1]
$canvas coords $item $newx1 $y1 $newx2 $y2
}
}
set item [expr $item+1]
}
}
# ------------------------------------------------------------
# A wish init script to make it possible for
# Tcl/Tk and erlang to communicate.
# Written by Ola Samuelsson in August 1995
# © Ericsson Software Technology AB / Erlang Systems
# ------------------------------------------------------------
# Protocol:
# \1 = it's an event
# \2 = it's a reply for a call
# \3 = it's a error reply for call
# \4 = it's an error
# \5 = stopbyte (end of message)
proc erlsend {args} {
global outstream
set msg [join $args]
puts -nonewline $outstream [binary format Ica* \
[expr 1 + [string length $msg]] 1 $msg]
flush $outstream
}
proc erlcall {w} {
global outstream
set errcode [catch $w result]
if {$errcode == 0} {
puts -nonewline $outstream [binary format Ica* \
[expr 1 + [string length $result]] 2 $result]
flush $outstream
} else {
puts -nonewline $outstream [binary format Ica* \
[expr 1 + [string length $result]] 3 $result]
flush $outstream
}
}
proc erlexec {w} {
set errcode [catch $w result]
if {$errcode != 0} {
global outstream
puts -nonewline $outstream [binary format Ica* \
[expr 1 + [string length $result]] 4 $result]
flush $outstream
}
}
proc erlerror {w} {
global outstream
puts -nonewline $outstream [binary format Ica* \
[expr 1 + [string length $w]] 4 $w]
flush $outstream
}
proc report {s} {
catch {console show}
puts -nonewline stderr "$s\r\n"
}
wm withdraw .
# The stdin stream is by default in line buffering mode.
# We set non blocking so that if the line is large we are
# not blocked until we get all data. The gets command
# will never give us a line until we have read it all
# so we do nothing if we get the return code -1.
# Note that -1 also means eof so we check that.
# FIXME: What is the default encoding on Unix?
# Do we need to set "-encoding iso8859-1" ?
# FIXME: If pipe we should do "catch {close $pipe}"
# but we don't do that on stdin do we? If not how
# do we unregister from 'fileevent'?
# The ending "vwait forever" will block
# until all streams are closed.
# FIXME: How are we terminated? No check for eof?
# If we got something on the command line after --
# we have a port number and we are to use sockets
# for the communication.
set privdir [lindex $argv 0]
set portno [lindex $argv 1]
#report $argv
#report $privdir
#report $portno
set resfile [file join $privdir gs-xdefaults]
# FIXME we may use 'startupFile' as priority level to enable the user
# to use .Xdefaults to override things but I think this require that
# we change gs-xdefaults to use Tk*Option format?
if [catch {option readfile $resfile} err] {
report "Error reading $resfile: $err"
}
if {$portno == ""} {
global use_socket
set use_socket 0
set instream stdin
set outstream stdout
# We are only allowed to set non blocking output
# for pipes because sockets are bidirectional
# and the fconfigure sets both input and output.
fconfigure stdout -buffering none -blocking false \
-translation binary -encoding binary
} else {
global use_socket
set use_socket 1
set sock [socket 127.0.0.1 $portno]
set instream $sock
set outstream $sock
}
fconfigure $instream -buffering none -blocking true \
-translation binary -encoding binary
fileevent $instream readable do_read
proc do_read {} {
global instream
binary scan [read $instream 4] I len
if {[eof $instream]} {
catch {close $instream}
exit
}
# report {"LEN $len"}
# FIXME need to read again if less then $len ?????
set command [read $instream $len]
if {[eof $instream]} {
catch {close $instream}
exit
}
# report {"INMSG $command EOMSG"}
if [catch {uplevel #0 $command} msg] {
report {$msg}
} else {
if {[string length $msg] != 0} {
# report {"OUTMSG $msg EOMSG"}
puts -nonewline $instream [binary format Ia* \
[string length $msg] $msg]
}
}
}
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