/* Title: Pure/Thy/latex.scala
Author: Makarius
Support for LaTeX.
*/
package isabelle
import java.io.{File => JFile}
import scala.annotation.tailrec
object Latex
{
/** latex errors **/
def latex_errors(dir: Path, root_name: String): List[String] =
{
val root_log_path = dir + Path.explode(root_name).ext("log")
if (root_log_path.is_file) {
for { (msg, pos) <- filter_errors(dir, File.read(root_log_path)) }
yield "Latex error" + Position.here(pos) + ":\n" + cat_lines(split_lines(msg).map(" " + _))
}
else Nil
}
/* generated .tex file */
private val File_Pattern = """^%:%file=(.+)%:%$""".r
private val Line_Pattern = """^*%:%line=(\d+)%:%$""".r
def read_tex_file(tex_file: Path): Tex_File =
new Tex_File(tex_file, Line.logical_lines(File.read(tex_file)).toArray)
final class Tex_File private[Latex](val tex_file: Path, tex_lines: Array[String])
{
override def toString: String = tex_file.toString
val source_file: Option[String] =
if (tex_lines.nonEmpty) {
tex_lines(0) match {
case File_Pattern(file) => Some(file)
case _ => None
}
}
else None
private def prev_lines_iterator(l: Int): Iterator[String] =
if (0 < l && l <= tex_lines.length)
Range.inclusive(l - 1, 0, -1).iterator.map(tex_lines(_))
else Iterator.empty
def source_position(l: Int): Option[Position.T] =
(for {
file <- source_file.iterator
s <- prev_lines_iterator(l)
line <-
(s match {
case Line_Pattern(Value.Int(line)) => Some(line)
case _ => None
})
}
yield { Position.Line_File(line, file) }).toStream.headOption
def position(line: Int): Position.T =
source_position(line) getOrElse Position.Line_File(line, tex_file.implode)
}
/* latex log */
def filter_errors(dir: Path, root_log: String): List[(String, Position.T)] =
{
val seen_files = Synchronized(Map.empty[JFile, Tex_File])
def check_tex_file(path: Path): Option[Tex_File] =
seen_files.change_result(seen =>
seen.get(path.file) match {
case None =>
if (path.is_file) {
val tex_file = read_tex_file(path)
(Some(tex_file), seen + (path.file -> tex_file))
}
else (None, seen)
case some => (some, seen)
})
def tex_file_position(path: Path, line: Int): Position.T =
check_tex_file(path) match {
case Some(tex_file) => tex_file.position(line)
case None => Position.Line_File(line, path.implode)
}
object File_Line_Error
{
val Pattern = """^(.*?\.\w\w\w):(\d+): (.*)$""".r
def unapply(line: String): Option[(Path, Int, String)] =
line match {
case Pattern(file, Value.Int(line), message) =>
val path = File.standard_path(file)
if (Path.is_wellformed(path)) {
val file = (dir + Path.explode(path)).canonical
if (file.is_file) Some((file, line, message)) else None
}
else None
case _ => None
}
}
object Line_Error
{
val Pattern = """^l\.(\d+) (.*)$""".r
def unapply(line: String): Option[(Int, String)] =
line match {
case Pattern(Value.Int(line), message) => Some((line, message))
case _ => None
}
}
@tailrec def filter(lines: List[String], result: List[(String, Position.T)])
: List[(String, Position.T)] =
{
lines match {
case File_Line_Error((file, line, msg1)) :: rest1 =>
val pos = tex_file_position(file, line)
rest1 match {
case Line_Error((line2, msg2)) :: rest2 if line == line2 =>
filter(rest2, (Exn.cat_message(msg1, msg2), pos) :: result)
case _ =>
filter(rest1, (msg1, pos) :: result)
}
case _ :: rest => filter(rest, result)
case Nil => result.reverse
}
}
filter(Line.logical_lines(root_log), Nil)
}
}