hybrid use of command blobs: inlined errors and auxiliary files;
static check of theory imports;
/* Title: Pure/Thy/present.scala
Author: Makarius
Theory presentation: HTML.
*/
package isabelle
import scala.collection.immutable.SortedMap
object Present
{
/* maintain chapter index -- NOT thread-safe */
private val index_path = Path.basic("index.html")
private val sessions_path = Path.basic(".sessions")
private def read_sessions(dir: Path): List[(String, String)] =
{
val path = dir + sessions_path
if (path.is_file) {
import XML.Decode._
list(pair(string, string))(YXML.parse_body(File.read(path)))
}
else Nil
}
private def write_sessions(dir: Path, sessions: List[(String, String)])
{
import XML.Encode._
File.write(dir + sessions_path, YXML.string_of_body(list(pair(string, string))(sessions)))
}
def update_chapter_index(info_path: Path, chapter: String, new_sessions: List[(String, String)])
{
val dir = info_path + Path.basic(chapter)
Isabelle_System.mkdirs(dir)
val sessions0 =
try { read_sessions(dir) }
catch { case _: XML.Error => Nil }
val sessions = (SortedMap.empty[String, String] ++ sessions0 ++ new_sessions).toList
write_sessions(dir, sessions)
File.write(dir + index_path, HTML.chapter_index(chapter, sessions))
}
}