lyx_mirror/src/mathed/texify

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#!/usr/bin/tclsh
# Script built on an idea of Jules Bean to extract "what TeX would do" from
# a given macro.
#
# Call it with texify '\macro' [...] to get a line per item giving ascent,
# descent, width, the font and the position in the font TeX would use to
# typeset the symbol.
# Original script:
#\batchmode
#\def\entails{$1}
#\edef\temp{\entails}
#\message{\string\meaning\temp}
#\setbox5=\box{$\entails$}
#\showbox5
#\bye
set filebase texifytmp
set hboxexp {^\\hbox.([0-9.]+)\+([0-9.]+).x([0-9.]+)}
set fontexp {^\.+\\ten([a-z]+) (.*)$}
foreach item $::argv {
set font unknown
set char {}
set value 0
set ascent 0
set descent 0
set widht 0
set f [open $filebase.tex w 0600]
puts $f "\\nonstopmode"
puts $f "\\setbox5=\\hbox\{\$$item\$\}"
puts $f "\\showbox5"
puts $f ""
puts $f "\\end"
close $f
if {[catch {exec tex $filebase.tex} err]} {
#puts "Error: '$err'"
}
set f [open $filebase.log r]
while {![eof $f]} {
gets $f line
# try to interpret it as a hbox line
regexp $hboxexp $line dummy ascent descent width
# try to interpret it as a font line
regexp $fontexp $line dummy font char
}
close $f
if {![string equal $font "unknown"]} {
if {[string equal -length 2 $char {^^}]} {
scan $char "%c%c%c" dummy1 dummy2 value
set value [expr {$value - 64}]
} else {
scan $char "%c" value
}
}
puts [list $ascent $descent $width $font $value $char]
}