src/Pure/PIDE/resources.scala
author wenzelm
Tue Sep 26 22:30:54 2017 +0200 (19 months ago)
changeset 66696 8f863dae78a0
parent 66695 91500c024c7f
child 66697 190834aa43a7
permissions -rw-r--r--
clarified pure_files, based on uniform loaded_files;
     1 /*  Title:      Pure/PIDE/resources.scala
     2     Author:     Makarius
     3 
     4 Resources for theories and auxiliary files.
     5 */
     6 
     7 package isabelle
     8 
     9 
    10 import scala.annotation.tailrec
    11 import scala.util.parsing.input.Reader
    12 
    13 import java.io.{File => JFile}
    14 
    15 
    16 class Resources(
    17   val session_base: Sessions.Base,
    18   val log: Logger = No_Logger)
    19 {
    20   val thy_info = new Thy_Info(this)
    21 
    22   def thy_path(path: Path): Path = path.ext("thy")
    23 
    24 
    25   /* file-system operations */
    26 
    27   def append(dir: String, source_path: Path): String =
    28     (Path.explode(dir) + source_path).expand.implode
    29 
    30   def append(node_name: Document.Node.Name, source_path: Path): String =
    31     append(node_name.master_dir, source_path)
    32 
    33 
    34   /* source files of Isabelle/ML bootstrap */
    35 
    36   def source_file(raw_name: String): Option[String] =
    37   {
    38     if (Path.is_wellformed(raw_name)) {
    39       if (Path.is_valid(raw_name)) {
    40         def check(p: Path): Option[Path] = if (p.is_file) Some(p) else None
    41 
    42         val path = Path.explode(raw_name)
    43         val path1 =
    44           if (path.is_absolute || path.is_current) check(path)
    45           else {
    46             check(Path.explode("~~/src/Pure") + path) orElse
    47               (if (Isabelle_System.getenv("ML_SOURCES") == "") None
    48                else check(Path.explode("$ML_SOURCES") + path))
    49           }
    50         Some(File.platform_path(path1 getOrElse path))
    51       }
    52       else None
    53     }
    54     else Some(raw_name)
    55   }
    56 
    57 
    58   /* theory files */
    59 
    60   def loaded_files(syntax: Outer_Syntax, name: Document.Node.Name): List[Path] =
    61   {
    62     val text = with_thy_reader(name, reader => Symbol.decode(reader.source.toString))
    63     if (syntax.load_commands_in(text)) {
    64       val spans = syntax.parse_spans(text)
    65       val dir = Path.explode(name.master_dir)
    66       spans.iterator.map(Command.span_files(syntax, _)._1).flatten.
    67         map(a => dir + Path.explode(a)).toList
    68     }
    69     else Nil
    70   }
    71 
    72   def pure_files(syntax: Outer_Syntax, session: String, dir: Path): List[Path] =
    73     if (Sessions.is_pure(session)) {
    74       val roots =
    75         for { (name, theory) <- Thy_Header.ml_roots }
    76         yield ((dir + Path.explode(name)).expand, theory)
    77       val files =
    78         for {
    79           (path, theory) <- roots
    80           file <- loaded_files(syntax, Document.Node.Name(path.implode, path.dir.implode, theory))
    81         } yield file
    82       roots.map(_._1) ::: files
    83     }
    84     else Nil
    85 
    86   def theory_qualifier(name: Document.Node.Name): String =
    87     session_base.global_theories.getOrElse(name.theory, Long_Name.qualifier(name.theory))
    88 
    89   def theory_name(qualifier: String, theory0: String): (Boolean, String) =
    90     session_base.loaded_theories.get(theory0) match {
    91       case Some(theory) => (true, theory)
    92       case None =>
    93         val theory =
    94           if (Long_Name.is_qualified(theory0) || session_base.global_theories.isDefinedAt(theory0))
    95             theory0
    96           else Long_Name.qualify(qualifier, theory0)
    97         (false, theory)
    98     }
    99 
   100   def import_name(qualifier: String, dir: String, s: String): Document.Node.Name =
   101     theory_name(qualifier, Thy_Header.import_name(s)) match {
   102       case (true, theory) => Document.Node.Name.loaded_theory(theory)
   103       case (false, theory) =>
   104         session_base.known_theory(theory) match {
   105           case Some(node_name) => node_name
   106           case None =>
   107             val path = Path.explode(s)
   108             val node = append(dir, thy_path(path))
   109             val master_dir = append(dir, path.dir)
   110             Document.Node.Name(node, master_dir, theory)
   111         }
   112     }
   113 
   114   def import_name(name: Document.Node.Name, s: String): Document.Node.Name =
   115     import_name(theory_qualifier(name), name.master_dir, s)
   116 
   117   def with_thy_reader[A](name: Document.Node.Name, f: Reader[Char] => A): A =
   118   {
   119     val path = File.check_file(Path.explode(name.node))
   120     val reader = Scan.byte_reader(path.file)
   121     try { f(reader) } finally { reader.close }
   122   }
   123 
   124   def check_thy_reader(node_name: Document.Node.Name, reader: Reader[Char],
   125     start: Token.Pos = Token.Pos.command, strict: Boolean = true): Document.Node.Header =
   126   {
   127     if (node_name.is_theory && reader.source.length > 0) {
   128       try {
   129         val header = Thy_Header.read(reader, start, strict).decode_symbols
   130 
   131         val base_name = node_name.theory_base_name
   132         val (name, pos) = header.name
   133         if (base_name != name)
   134           error("Bad theory name " + quote(name) +
   135             " for file " + thy_path(Path.basic(base_name)) + Position.here(pos) +
   136             Completion.report_names(pos, 1, List((base_name, ("theory", base_name)))))
   137 
   138         val imports = header.imports.map({ case (s, pos) => (import_name(node_name, s), pos) })
   139         Document.Node.Header(imports, header.keywords, header.abbrevs)
   140       }
   141       catch { case exn: Throwable => Document.Node.bad_header(Exn.message(exn)) }
   142     }
   143     else Document.Node.no_header
   144   }
   145 
   146   def check_thy(name: Document.Node.Name, start: Token.Pos = Token.Pos.command,
   147       strict: Boolean = true): Document.Node.Header =
   148     with_thy_reader(name, check_thy_reader(name, _, start, strict))
   149 
   150 
   151   /* special header */
   152 
   153   def special_header(name: Document.Node.Name): Option[Document.Node.Header] =
   154   {
   155     val imports =
   156       if (Thy_Header.is_ml_root(name.theory)) List(import_name(name, Thy_Header.ML_BOOTSTRAP))
   157       else if (Thy_Header.is_bootstrap(name.theory)) List(import_name(name, Thy_Header.PURE))
   158       else Nil
   159     if (imports.isEmpty) None
   160     else Some(Document.Node.Header(imports.map((_, Position.none))))
   161   }
   162 
   163 
   164   /* blobs */
   165 
   166   def undefined_blobs(nodes: Document.Nodes): List[Document.Node.Name] =
   167     (for {
   168       (node_name, node) <- nodes.iterator
   169       if !session_base.loaded_theory(node_name)
   170       cmd <- node.load_commands.iterator
   171       name <- cmd.blobs_undefined.iterator
   172     } yield name).toList
   173 
   174 
   175   /* document changes */
   176 
   177   def parse_change(
   178       reparse_limit: Int,
   179       previous: Document.Version,
   180       doc_blobs: Document.Blobs,
   181       edits: List[Document.Edit_Text]): Session.Change =
   182     Thy_Syntax.parse_change(this, reparse_limit, previous, doc_blobs, edits)
   183 
   184   def commit(change: Session.Change) { }
   185 }