/* Title: Pure/Tools/fontforge.scala
Author: Makarius
Support for fontforge and its scripting language:
https://github.com/fontforge/fontforge/blob/master/fontforge/scripting.c
*/
package isabelle
import java.io.{File => JFile}
import java.util.Locale
object Fontforge
{
/** scripting language **/
type Script = String
/* concrete syntax */
def string(s: String): Script =
{
val quote = if (s.contains('"')) '\'' else '"'
def err(c: Char): Nothing =
error("Bad character in fontforge string: \\u" +
String.format(Locale.ROOT, "%04x", new Integer(c)))
def escape(c: Char): String =
{
if (c == '\u0000' || c == '\r' || c == quote) err(c)
else if (c == '\n') "\\n"
else if (c == '\\') "\\\\"
else c.toString
}
if (s.nonEmpty && s(0) == '\\') err('\\')
s.iterator.map(escape(_)).mkString(quote.toString, "", quote.toString)
}
/* execute process */
def execute(script: Script, args: String = "", cwd: JFile = null): Process_Result =
Isabelle_System.with_tmp_file("fontforge")(script_file =>
{
File.write(script_file, script)
Isabelle_System.bash(File.bash_path(Path.explode("$ISABELLE_FONTFORGE")) +
" -lang=ff -script " + File.bash_path(script_file) + " " + args)
})
}