src/Pure/PIDE/resources.scala
author wenzelm
Tue Sep 26 20:54:40 2017 +0200 (20 months ago)
changeset 66695 91500c024c7f
parent 65532 febfd9f78bd4
child 66696 8f863dae78a0
permissions -rw-r--r--
tuned;
     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, text: String): List[String] =
    61     if (syntax.load_commands_in(text)) {
    62       val spans = syntax.parse_spans(text)
    63       spans.iterator.map(Command.span_files(syntax, _)._1).flatten.toList
    64     }
    65     else Nil
    66 
    67   def loaded_files(syntax: Outer_Syntax, name: Document.Node.Name): List[Path] =
    68   {
    69     val text = with_thy_reader(name, reader => Symbol.decode(reader.source.toString))
    70     val dir = Path.explode(name.master_dir)
    71     loaded_files(syntax, text).map(a => dir + Path.explode(a))
    72   }
    73 
    74   def theory_qualifier(name: Document.Node.Name): String =
    75     session_base.global_theories.getOrElse(name.theory, Long_Name.qualifier(name.theory))
    76 
    77   def theory_name(qualifier: String, theory0: String): (Boolean, String) =
    78     session_base.loaded_theories.get(theory0) match {
    79       case Some(theory) => (true, theory)
    80       case None =>
    81         val theory =
    82           if (Long_Name.is_qualified(theory0) || session_base.global_theories.isDefinedAt(theory0))
    83             theory0
    84           else Long_Name.qualify(qualifier, theory0)
    85         (false, theory)
    86     }
    87 
    88   def import_name(qualifier: String, dir: String, s: String): Document.Node.Name =
    89     theory_name(qualifier, Thy_Header.import_name(s)) match {
    90       case (true, theory) => Document.Node.Name.loaded_theory(theory)
    91       case (false, theory) =>
    92         session_base.known_theory(theory) match {
    93           case Some(node_name) => node_name
    94           case None =>
    95             val path = Path.explode(s)
    96             val node = append(dir, thy_path(path))
    97             val master_dir = append(dir, path.dir)
    98             Document.Node.Name(node, master_dir, theory)
    99         }
   100     }
   101 
   102   def import_name(name: Document.Node.Name, s: String): Document.Node.Name =
   103     import_name(theory_qualifier(name), name.master_dir, s)
   104 
   105   def with_thy_reader[A](name: Document.Node.Name, f: Reader[Char] => A): A =
   106   {
   107     val path = File.check_file(Path.explode(name.node))
   108     val reader = Scan.byte_reader(path.file)
   109     try { f(reader) } finally { reader.close }
   110   }
   111 
   112   def check_thy_reader(node_name: Document.Node.Name, reader: Reader[Char],
   113     start: Token.Pos = Token.Pos.command, strict: Boolean = true): Document.Node.Header =
   114   {
   115     if (node_name.is_theory && reader.source.length > 0) {
   116       try {
   117         val header = Thy_Header.read(reader, start, strict).decode_symbols
   118 
   119         val base_name = node_name.theory_base_name
   120         val (name, pos) = header.name
   121         if (base_name != name)
   122           error("Bad theory name " + quote(name) +
   123             " for file " + thy_path(Path.basic(base_name)) + Position.here(pos) +
   124             Completion.report_names(pos, 1, List((base_name, ("theory", base_name)))))
   125 
   126         val imports = header.imports.map({ case (s, pos) => (import_name(node_name, s), pos) })
   127         Document.Node.Header(imports, header.keywords, header.abbrevs)
   128       }
   129       catch { case exn: Throwable => Document.Node.bad_header(Exn.message(exn)) }
   130     }
   131     else Document.Node.no_header
   132   }
   133 
   134   def check_thy(name: Document.Node.Name, start: Token.Pos = Token.Pos.command,
   135       strict: Boolean = true): Document.Node.Header =
   136     with_thy_reader(name, check_thy_reader(name, _, start, strict))
   137 
   138 
   139   /* special header */
   140 
   141   def special_header(name: Document.Node.Name): Option[Document.Node.Header] =
   142   {
   143     val imports =
   144       if (Thy_Header.is_ml_root(name.theory)) List(import_name(name, Thy_Header.ML_BOOTSTRAP))
   145       else if (Thy_Header.is_bootstrap(name.theory)) List(import_name(name, Thy_Header.PURE))
   146       else Nil
   147     if (imports.isEmpty) None
   148     else Some(Document.Node.Header(imports.map((_, Position.none))))
   149   }
   150 
   151 
   152   /* blobs */
   153 
   154   def undefined_blobs(nodes: Document.Nodes): List[Document.Node.Name] =
   155     (for {
   156       (node_name, node) <- nodes.iterator
   157       if !session_base.loaded_theory(node_name)
   158       cmd <- node.load_commands.iterator
   159       name <- cmd.blobs_undefined.iterator
   160     } yield name).toList
   161 
   162 
   163   /* document changes */
   164 
   165   def parse_change(
   166       reparse_limit: Int,
   167       previous: Document.Version,
   168       doc_blobs: Document.Blobs,
   169       edits: List[Document.Edit_Text]): Session.Change =
   170     Thy_Syntax.parse_change(this, reparse_limit, previous, doc_blobs, edits)
   171 
   172   def commit(change: Session.Change) { }
   173 }