src/Pure/PIDE/resources.scala
author wenzelm
Sat Apr 08 20:56:41 2017 +0200 (2017-04-08)
changeset 65441 9425e4d8bdb6
parent 65439 862bfd2b4fd4
child 65445 e9e7f5f5794c
permissions -rw-r--r--
more session_base information in ML;
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 = "",
    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_file(dir: String, raw_name: String): String =
    32     if (Path.is_valid(raw_name)) append(dir, Path.explode(raw_name))
    33     else raw_name
    34 
    35 
    36 
    37   /* source files of Isabelle/ML bootstrap */
    38 
    39   def source_file(raw_name: String): Option[String] =
    40   {
    41     if (Path.is_wellformed(raw_name)) {
    42       if (Path.is_valid(raw_name)) {
    43         def check(p: Path): Option[Path] = if (p.is_file) Some(p) else None
    44 
    45         val path = Path.explode(raw_name)
    46         val path1 =
    47           if (path.is_absolute || path.is_current) check(path)
    48           else {
    49             check(Path.explode("~~/src/Pure") + path) orElse
    50               (if (Isabelle_System.getenv("ML_SOURCES") == "") None
    51                else check(Path.explode("$ML_SOURCES") + path))
    52           }
    53         Some(File.platform_path(path1 getOrElse path))
    54       }
    55       else None
    56     }
    57     else Some(raw_name)
    58   }
    59 
    60 
    61   /* theory files */
    62 
    63   def loaded_files(syntax: Outer_Syntax, text: String): List[String] =
    64     if (syntax.load_commands_in(text)) {
    65       val spans = syntax.parse_spans(text)
    66       spans.iterator.map(Command.span_files(syntax, _)._1).flatten.toList
    67     }
    68     else Nil
    69 
    70   def import_name(dir: String, s: String): Document.Node.Name =
    71   {
    72     val theory0 = Thy_Header.base_name(s)
    73     val theory =
    74       if (Long_Name.is_qualified(theory0) || session_base.global_theories.contains(theory0)) theory0
    75       else Long_Name.qualify(default_qualifier, theory0)
    76 
    77     session_base.loaded_theories.get(theory) orElse
    78     session_base.loaded_theories.get(theory0) orElse
    79     session_base.known_theories.get(theory) orElse
    80     session_base.known_theories.get(theory0) getOrElse {
    81       val path = Path.explode(s)
    82       val node = append(dir, thy_path(path))
    83       val master_dir = append(dir, path.dir)
    84       Document.Node.Name(node, master_dir, theory)
    85     }
    86   }
    87 
    88   def with_thy_reader[A](name: Document.Node.Name, f: Reader[Char] => A): A =
    89   {
    90     val path = Path.explode(name.node)
    91     if (!path.is_file) error("No such file: " + path.toString)
    92 
    93     val reader = Scan.byte_reader(path.file)
    94     try { f(reader) } finally { reader.close }
    95   }
    96 
    97   def check_thy_reader(node_name: Document.Node.Name, reader: Reader[Char],
    98     start: Token.Pos = Token.Pos.command, strict: Boolean = true): Document.Node.Header =
    99   {
   100     if (node_name.is_theory && reader.source.length > 0) {
   101       try {
   102         val header = Thy_Header.read(reader, start, strict).decode_symbols
   103 
   104         val base_name = node_name.theory_base_name
   105         val (name, pos) = header.name
   106         if (base_name != name)
   107           error("Bad theory name " + quote(name) +
   108             " for file " + thy_path(Path.basic(base_name)) + Position.here(pos) +
   109             Completion.report_names(pos, 1, List((base_name, ("theory", base_name)))))
   110 
   111         val imports =
   112           header.imports.map({ case (s, pos) => (import_name(node_name.master_dir, s), pos) })
   113         Document.Node.Header(imports, header.keywords, header.abbrevs)
   114       }
   115       catch { case exn: Throwable => Document.Node.bad_header(Exn.message(exn)) }
   116     }
   117     else Document.Node.no_header
   118   }
   119 
   120   def check_thy(name: Document.Node.Name, start: Token.Pos = Token.Pos.command,
   121       strict: Boolean = true): Document.Node.Header =
   122     with_thy_reader(name, check_thy_reader(name, _, start, strict))
   123 
   124 
   125   /* special header */
   126 
   127   def special_header(name: Document.Node.Name): Option[Document.Node.Header] =
   128     if (Thy_Header.is_ml_root(name.theory))
   129       Some(Document.Node.Header(
   130         List((import_name(name.master_dir, Thy_Header.ML_BOOTSTRAP), Position.none))))
   131     else if (Thy_Header.is_bootstrap(name.theory))
   132       Some(Document.Node.Header(
   133         List((import_name(name.master_dir, Thy_Header.PURE), Position.none))))
   134     else None
   135 
   136 
   137   /* blobs */
   138 
   139   def undefined_blobs(nodes: Document.Nodes): List[Document.Node.Name] =
   140     (for {
   141       (node_name, node) <- nodes.iterator
   142       if !session_base.loaded_theory(node_name)
   143       cmd <- node.load_commands.iterator
   144       name <- cmd.blobs_undefined.iterator
   145     } yield name).toList
   146 
   147 
   148   /* document changes */
   149 
   150   def parse_change(
   151       reparse_limit: Int,
   152       previous: Document.Version,
   153       doc_blobs: Document.Blobs,
   154       edits: List[Document.Edit_Text]): Session.Change =
   155     Thy_Syntax.parse_change(this, reparse_limit, previous, doc_blobs, edits)
   156 
   157   def commit(change: Session.Change) { }
   158 }