src/Pure/PIDE/resources.scala
author wenzelm
Mon Apr 17 12:29:50 2017 +0200 (2017-04-17)
changeset 65489 f3076367f4a8
parent 65488 331f09d9535e
child 65494 88e6442c3150
permissions -rw-r--r--
tuned signature;
     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 default_qualifier: String = Sessions.DRAFT,
    19   val log: Logger = No_Logger)
    20 {
    21   val thy_info = new Thy_Info(this)
    22 
    23   def thy_path(path: Path): Path = path.ext("thy")
    24 
    25 
    26   /* file-system operations */
    27 
    28   def append(dir: String, source_path: Path): String =
    29     (Path.explode(dir) + source_path).expand.implode
    30 
    31   def append(node_name: Document.Node.Name, source_path: Path): String =
    32     append(node_name.master_dir, source_path)
    33 
    34 
    35   /* source files of Isabelle/ML bootstrap */
    36 
    37   def source_file(raw_name: String): Option[String] =
    38   {
    39     if (Path.is_wellformed(raw_name)) {
    40       if (Path.is_valid(raw_name)) {
    41         def check(p: Path): Option[Path] = if (p.is_file) Some(p) else None
    42 
    43         val path = Path.explode(raw_name)
    44         val path1 =
    45           if (path.is_absolute || path.is_current) check(path)
    46           else {
    47             check(Path.explode("~~/src/Pure") + path) orElse
    48               (if (Isabelle_System.getenv("ML_SOURCES") == "") None
    49                else check(Path.explode("$ML_SOURCES") + path))
    50           }
    51         Some(File.platform_path(path1 getOrElse path))
    52       }
    53       else None
    54     }
    55     else Some(raw_name)
    56   }
    57 
    58 
    59   /* theory files */
    60 
    61   def loaded_files(syntax: Outer_Syntax, text: String): List[String] =
    62     if (syntax.load_commands_in(text)) {
    63       val spans = syntax.parse_spans(text)
    64       spans.iterator.map(Command.span_files(syntax, _)._1).flatten.toList
    65     }
    66     else Nil
    67 
    68   def theory_qualifier(name: Document.Node.Name): String =
    69     session_base.global_theories.getOrElse(name.theory, Long_Name.qualifier(name.theory))
    70 
    71   def theory_name(qualifier: String, theory0: String): (Boolean, String) =
    72     session_base.loaded_theories.get(theory0) match {
    73       case Some(theory) => (true, theory)
    74       case None =>
    75         val theory =
    76           if (Long_Name.is_qualified(theory0) || session_base.global_theories.isDefinedAt(theory0)
    77               || true /* FIXME */) theory0
    78           else Long_Name.qualify(qualifier, theory0)
    79         (false, theory)
    80     }
    81 
    82   def import_name(qualifier: String, dir: String, s: String): Document.Node.Name =
    83     theory_name(qualifier, Thy_Header.import_name(s)) match {
    84       case (true, theory) => Document.Node.Name.loaded_theory(theory)
    85       case (false, theory) =>
    86         session_base.known_theories.get(theory) match {
    87           case Some(node_name) => node_name
    88           case None =>
    89             val path = Path.explode(s)
    90             val node = append(dir, thy_path(path))
    91             val master_dir = append(dir, path.dir)
    92             Document.Node.Name(node, master_dir, theory)
    93         }
    94     }
    95 
    96   def import_name(node_name: Document.Node.Name, s: String): Document.Node.Name =
    97     import_name(theory_qualifier(node_name), node_name.master_dir, s)
    98 
    99   def with_thy_reader[A](name: Document.Node.Name, f: Reader[Char] => A): A =
   100   {
   101     val path = Path.explode(name.node)
   102     if (!path.is_file) error("No such file: " + path.toString)
   103 
   104     val reader = Scan.byte_reader(path.file)
   105     try { f(reader) } finally { reader.close }
   106   }
   107 
   108   def check_thy_reader(node_name: Document.Node.Name, reader: Reader[Char],
   109     start: Token.Pos = Token.Pos.command, strict: Boolean = true): Document.Node.Header =
   110   {
   111     if (node_name.is_theory && reader.source.length > 0) {
   112       try {
   113         val header = Thy_Header.read(reader, start, strict).decode_symbols
   114 
   115         val base_name = node_name.theory_base_name
   116         val (name, pos) = header.name
   117         if (base_name != name)
   118           error("Bad theory name " + quote(name) +
   119             " for file " + thy_path(Path.basic(base_name)) + Position.here(pos) +
   120             Completion.report_names(pos, 1, List((base_name, ("theory", base_name)))))
   121 
   122         val imports = header.imports.map({ case (s, pos) => (import_name(node_name, s), pos) })
   123         Document.Node.Header(imports, header.keywords, header.abbrevs)
   124       }
   125       catch { case exn: Throwable => Document.Node.bad_header(Exn.message(exn)) }
   126     }
   127     else Document.Node.no_header
   128   }
   129 
   130   def check_thy(name: Document.Node.Name, start: Token.Pos = Token.Pos.command,
   131       strict: Boolean = true): Document.Node.Header =
   132     with_thy_reader(name, check_thy_reader(name, _, start, strict))
   133 
   134 
   135   /* special header */
   136 
   137   def special_header(name: Document.Node.Name): Option[Document.Node.Header] =
   138   {
   139     val imports =
   140       if (Thy_Header.is_ml_root(name.theory)) List(import_name(name, Thy_Header.ML_BOOTSTRAP))
   141       else if (Thy_Header.is_bootstrap(name.theory)) List(import_name(name, Thy_Header.PURE))
   142       else Nil
   143     if (imports.isEmpty) None
   144     else Some(Document.Node.Header(imports.map((_, Position.none))))
   145   }
   146 
   147 
   148   /* blobs */
   149 
   150   def undefined_blobs(nodes: Document.Nodes): List[Document.Node.Name] =
   151     (for {
   152       (node_name, node) <- nodes.iterator
   153       if !session_base.loaded_theory(node_name)
   154       cmd <- node.load_commands.iterator
   155       name <- cmd.blobs_undefined.iterator
   156     } yield name).toList
   157 
   158 
   159   /* document changes */
   160 
   161   def parse_change(
   162       reparse_limit: Int,
   163       previous: Document.Version,
   164       doc_blobs: Document.Blobs,
   165       edits: List[Document.Edit_Text]): Session.Change =
   166     Thy_Syntax.parse_change(this, reparse_limit, previous, doc_blobs, edits)
   167 
   168   def commit(change: Session.Change) { }
   169 }