src/Tools/jEdit/src/jedit_thy_load.scala

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Tools/jEdit/src/jedit_thy_load.scala	Tue Aug 30 11:43:47 2011 +0200
@@ -0,0 +1,68 @@
+/*  Title:      Tools/jEdit/src/plugin.scala
+    Author:     Makarius
+
+Primitives for loading theory files, based on jEdit buffer content.
+*/
+
+package isabelle.jedit
+
+
+import isabelle._
+
+import java.io.File
+import javax.swing.text.Segment
+
+import org.gjt.sp.jedit.io.{VFS, FileVFS, VFSManager}
+import org.gjt.sp.jedit.MiscUtilities
+
+
+class JEdit_Thy_Load extends Thy_Load
+{
+  /* loaded theories provided by prover */
+
+  private var loaded_theories: Set[String] = Set()
+
+  override def register_thy(thy_name: String)
+  {
+    synchronized { loaded_theories += thy_name }
+  }
+
+  override def is_loaded(thy_name: String): Boolean =
+    synchronized { loaded_theories.contains(thy_name) }
+
+
+  /* file-system operations */
+
+  override def append(master_dir: String, source_path: Path): String =
+  {
+    val path = source_path.expand
+    if (path.is_absolute) Isabelle_System.platform_path(path)
+    else {
+      val vfs = VFSManager.getVFSForPath(master_dir)
+      if (vfs.isInstanceOf[FileVFS])
+        MiscUtilities.resolveSymlinks(
+          vfs.constructPath(master_dir, Isabelle_System.platform_path(path)))
+      else vfs.constructPath(master_dir, Isabelle_System.standard_path(path))
+    }
+  }
+
+  override def check_thy(node_name: String): Thy_Header =
+  {
+    Swing_Thread.now {
+      Isabelle.jedit_buffers().find(buffer => Isabelle.buffer_name(buffer) == node_name) match {
+        case Some(buffer) =>
+          Isabelle.buffer_lock(buffer) {
+            val text = new Segment
+            buffer.getText(0, buffer.getLength, text)
+            Some(Thy_Header.read(text))
+          }
+        case None => None
+      }
+    } getOrElse {
+      val file = new File(node_name)  // FIXME load URL via jEdit VFS (!?)
+      if (!file.exists || !file.isFile) error("No such file: " + quote(file.toString))
+      Thy_Header.read(file)
+    }
+  }
+}
+