fixconsolas

#!/bin/bash
#
# Requires ftxdumperfuser from http://developer.apple.com/textfonts/download/
#
# Usage: fixconsolas [files ...]
#   When called with no arguments, it attempts to operate on every TrueType
#     file in the current directory.
#
# References:
#   http://bandes-storch.net/blog/2008/12/21/consolas-controlled/#comment-2042
#   http://lists.macromates.com/textmate/2009-March/028282.html

# test for ftxdumperfuser in PATH
ftxdumperfuser &>/dev/null
if [ $? -eq 127 ]; then
	echo "The ftxdumperfuser utility was not found!"
	echo "Please download and install to continue:"
	echo "    http://developer.apple.com/textfonts/download/"
	exit $?
fi

# protect against spaces in filenames
# hat tip Alexey Blinov
# and http://tldp.org/LDP/abs/html/internalvariables.html#IFSH
IFS=$'\n'

if [ $# -eq 0 ]; then
	# when no arguments passed,
	# set positional parameters
	# to ttf in current directory
	set -- $(ls *.[Tt][Tt][Ff])
fi

unset IFS # reset to default

E_NOARGS=85
if [ -z "$1" ]; then
	echo "Error: No TrueType font files found!"
	echo "Usage: `basename $0` [Consolas.ttf]"
	exit $E_NOARGS
fi


ASC="1884" # ascender
DSC="514"  # descender, already negative in file
GAP="0"    # lineGap

D='[0-9]\{1,\}' # BRE equivalent of PCRE \d+

# iterate through positional parameters
for font
do
	# error-checking, what a concept
	if [ ! -e "$font" ]; then
		echo "$font does not exist."
		continue
	fi

	# dump hhea table
	ftxdumperfuser -t hhea "$font" | \
	# replace desired values
	sed \
		-e "/ascender=/s/$D/$ASC/" \
		-e "/descender=/s/$D/$DSC/" \
		-e "/lineGap=/s/$D/$GAP/" | \
	# fuse hhea table back into font
	ftxdumperfuser -F -t hhea "$font"

	echo "Fixed $font"
done

exit $?