src/Tools/jEdit/src/jedit_resources.scala
author wenzelm
Mon Jan 09 20:26:59 2017 +0100 (2017-01-09)
changeset 64854 f5aa712e6250
parent 64841 d53696aed874
child 64856 5e9bf964510a
permissions -rw-r--r--
tuned signature;
     1 /*  Title:      Tools/jEdit/src/jedit_resources.scala
     2     Author:     Makarius
     3 
     4 Resources for theories and auxiliary files, based on jEdit buffer
     5 content and virtual file-systems.
     6 */
     7 
     8 package isabelle.jedit
     9 
    10 
    11 import isabelle._
    12 
    13 import java.io.{File => JFile, ByteArrayOutputStream}
    14 import javax.swing.text.Segment
    15 
    16 import scala.util.parsing.input.Reader
    17 
    18 import org.gjt.sp.jedit.io.{VFS, FileVFS, VFSManager}
    19 import org.gjt.sp.jedit.MiscUtilities
    20 import org.gjt.sp.jedit.{jEdit, View, Buffer}
    21 import org.gjt.sp.jedit.bufferio.BufferIORequest
    22 
    23 
    24 object JEdit_Resources
    25 {
    26   val empty: JEdit_Resources = new JEdit_Resources(Build.Session_Content.empty)
    27 }
    28 
    29 class JEdit_Resources(base: Build.Session_Content) extends Resources(base)
    30 {
    31   /* document node name */
    32 
    33   def node_name(buffer: Buffer): Document.Node.Name =
    34   {
    35     val node = JEdit_Lib.buffer_name(buffer)
    36     val theory = Thy_Header.thy_name_bootstrap(node).getOrElse("")
    37     val master_dir = if (theory == "") "" else buffer.getDirectory
    38     Document.Node.Name(node, master_dir, theory)
    39   }
    40 
    41   def node_name(path: String): Document.Node.Name =
    42   {
    43     val vfs = VFSManager.getVFSForPath(path)
    44     val node = if (vfs.isInstanceOf[FileVFS]) MiscUtilities.resolveSymlinks(path) else path
    45     val theory = Thy_Header.thy_name_bootstrap(node).getOrElse("")
    46     val master_dir = if (theory == "") "" else vfs.getParentOfPath(path)
    47     Document.Node.Name(node, master_dir, theory)
    48   }
    49 
    50   def theory_node_name(buffer: Buffer): Option[Document.Node.Name] =
    51   {
    52     val name = node_name(buffer)
    53     if (name.is_theory) Some(name) else None
    54   }
    55 
    56   override def append(dir: String, source_path: Path): String =
    57   {
    58     val path = source_path.expand
    59     if (dir == "" || path.is_absolute)
    60       MiscUtilities.resolveSymlinks(File.platform_path(path))
    61     else if (path.is_current) dir
    62     else {
    63       val vfs = VFSManager.getVFSForPath(dir)
    64       if (vfs.isInstanceOf[FileVFS])
    65         MiscUtilities.resolveSymlinks(
    66           vfs.constructPath(dir, File.platform_path(path)))
    67       else vfs.constructPath(dir, File.standard_path(path))
    68     }
    69   }
    70 
    71 
    72   /* file content */
    73 
    74   def read_file_content(node_name: Document.Node.Name): Option[String] =
    75   {
    76     val name = node_name.node
    77     try {
    78       val text =
    79         if (Url.is_wellformed(name)) Url.read(Url(name))
    80         else File.read(new JFile(name))
    81       Some(Symbol.decode(Line.normalize(text)))
    82     }
    83     catch { case ERROR(_) => None }
    84   }
    85 
    86   def get_file_content(node_name: Document.Node.Name): Option[String] =
    87     Document_Model.get(node_name) match {
    88       case Some(model: Buffer_Model) => Some(JEdit_Lib.buffer_text(model.buffer))
    89       case Some(model: File_Model) => Some(model.content.text)
    90       case None => read_file_content(node_name)
    91     }
    92 
    93   override def with_thy_reader[A](name: Document.Node.Name, f: Reader[Char] => A): A =
    94   {
    95     GUI_Thread.now {
    96       Document_Model.get(name) match {
    97         case Some(model: Buffer_Model) =>
    98           JEdit_Lib.buffer_lock(model.buffer) { Some(f(JEdit_Lib.buffer_reader(model.buffer))) }
    99         case Some(model: File_Model) => Some(f(Scan.char_reader(model.content.text)))
   100         case None => None
   101       }
   102     } getOrElse {
   103       if (Url.is_wellformed(name.node)) f(Scan.byte_reader(Url(name.node)))
   104       else {
   105         val file = new JFile(name.node)
   106         if (file.isFile) f(Scan.byte_reader(file))
   107         else error("No such file: " + quote(file.toString))
   108       }
   109     }
   110   }
   111 
   112 
   113   private class File_Content_Output(buffer: Buffer) extends
   114     ByteArrayOutputStream(buffer.getLength + 1)
   115   {
   116     def content(): Bytes = Bytes(this.buf, 0, this.count)
   117   }
   118 
   119   private class File_Content(buffer: Buffer) extends
   120     BufferIORequest(null, buffer, null, VFSManager.getVFSForPath(buffer.getPath), buffer.getPath)
   121   {
   122     def _run() { }
   123     def content(): Bytes =
   124     {
   125       val out = new File_Content_Output(buffer)
   126       write(buffer, out)
   127       out.content()
   128     }
   129   }
   130 
   131   def make_file_content(buffer: Buffer): Bytes = (new File_Content(buffer)).content()
   132 
   133 
   134   /* theory text edits */
   135 
   136   override def commit(change: Session.Change)
   137   {
   138     if (change.syntax_changed.nonEmpty)
   139       GUI_Thread.later { Document_Model.syntax_changed(change.syntax_changed) }
   140     if (change.deps_changed ||
   141         PIDE.options.bool("jedit_auto_resolve") && undefined_blobs(change.version.nodes).nonEmpty)
   142       PIDE.deps_changed()
   143   }
   144 }