Added Scala Plugin Spy.

This adds a view that can show the cursor offset in the current document,
and additional Scala compiler information:

* tree.pos (range positions)
* tree.tpe
* tree.symbol
* tree.tpe

org.scala-ide.sdt.build/pom.xml

@@ -20,6 +20,7 @@
     <module>../org.scala-ide.sdt.aspects</module>
     <module>../org.scala-ide.sdt.core</module>
     <module>../org.scala-ide.sdt.core.tests</module>
+    <module>../org.scala-ide.sdt.spy</module>
     <module>../org.scala-ide.sdt.debug</module>
     <module>../org.scala-ide.sdt.debug.tests</module>
     <module>../org.scala-ide.sdt.weaving.feature</module>

org.scala-ide.sdt.dev.feature/feature.xml

@@ -69,4 +69,11 @@ SUCH DAMAGE.
          version="0.0.0"
          unpack="false"/>
 
+   <plugin
+         id="org.scala-ide.sdt.spy"
+         download-size="0"
+         install-size="0"
+         version="0.0.0"
+         unpack="false"/>
+
 </feature>

org.scala-ide.sdt.spy/.classpath

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="con" path="org.scala-ide.sdt.launching.SCALA_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

org.scala-ide.sdt.spy/.gitignore

@@ -0,0 +1 @@
+target/

org.scala-ide.sdt.spy/.project

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+  <name>org.scala-ide.sdt.spy</name>
+  <comment></comment>
+  <projects>
+  </projects>
+  <buildSpec>
+    <buildCommand>
+      <name>org.scala-ide.sdt.core.scalabuilder</name>
+      <arguments></arguments>
+    </buildCommand>
+    <buildCommand>
+      <name>org.eclipse.pde.ManifestBuilder</name>
+      <arguments></arguments>
+    </buildCommand>
+    <buildCommand>
+      <name>org.eclipse.pde.SchemaBuilder</name>
+        <arguments></arguments>
+    </buildCommand>
+  </buildSpec>
+  <natures>
+    <nature>org.eclipse.pde.PluginNature</nature>
+    <nature>org.scala-ide.sdt.core.scalanature</nature>
+    <nature>org.eclipse.jdt.core.javanature</nature>
+  </natures>
+</projectDescription>

org.scala-ide.sdt.spy/META-INF/MANIFEST.MF

@@ -0,0 +1,32 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Scala Plugin Spy
+Bundle-SymbolicName: org.scala-ide.sdt.spy;singleton:=true
+Bundle-Version: 2.1.0.qualifier
+Bundle-Vendor: Scala IDE
+Bundle-ActivationPolicy: lazy
+Bundle-Localization: plugin
+Require-Bundle: 
+ org.eclipse.core.runtime,
+ org.eclipse.debug.ui,
+ org.eclipse.help,
+ org.eclipse.jdt.core,
+ org.eclipse.jdt.debug.ui,
+ org.eclipse.jdt.junit,
+ org.eclipse.jdt.launching,
+ org.eclipse.jdt.ui,
+ org.eclipse.jface.text,
+ org.eclipse.ui,
+ org.eclipse.ui.console,
+ org.eclipse.ui.editors,
+ org.eclipse.ui.forms,
+ org.eclipse.ui.ide,
+ org.scala-ide.scala.library,
+ org.scala-ide.scala.compiler,
+ org.scala-ide.sdt.core;bundle-version="[2.1.0, 2.2.0)"
+Import-Package: 
+ com.ibm.icu.text;apply-aspects:=false;org.eclipse.swt.graphics;apply-aspects:=false,
+ scala.tools.eclipse;apply-aspects:=false,
+ scala.tools.eclipse.contribution.weaving.jdt.ui.javaeditor.formatter;apply-aspects:=false
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
+Bundle-ClassPath: .

org.scala-ide.sdt.spy/build.properties

@@ -0,0 +1,7 @@
+source.. = src/
+output.. = target/classes/
+bin.includes = META-INF/,\
+               icons/,\
+               .,\
+               plugin.xml,\
+               plugin.properties

org.scala-ide.sdt.spy/plugin.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.2"?>
+<plugin>
+   <extension
+         point="org.eclipse.ui.views">
+      <view
+            allowMultiple="false"
+            category="org.scala-ide.sdt.core.viewCategory"
+            class="org.scalaide.spy.SpyView"
+            icon="icons/cog.ico"
+            id="org.scalaide.spy.view"
+            name="Scala Spy View"
+            restorable="true">
+      </view>
+   </extension>
+</plugin>

org.scala-ide.sdt.spy/pom.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.scala-ide</groupId>
+    <artifactId>org.scala-ide.sdt.build</artifactId>
+    <version>2.1.0-SNAPSHOT</version>
+    <relativePath>../org.scala-ide.sdt.build/pom.xml</relativePath>
+  </parent>
+  <artifactId>org.scala-ide.sdt.spy</artifactId>
+  <packaging>eclipse-plugin</packaging>
+
+</project>

org.scala-ide.sdt.spy/src/org/scalaide/spy/SpyView.scala

@@ -0,0 +1,75 @@
+package org.scalaide.spy
+
+import org.eclipse.jface.text.ITextSelection
+import org.eclipse.jface.viewers.ISelection
+import org.eclipse.swt.SWT
+import org.eclipse.swt.widgets.Composite
+import org.eclipse.swt.widgets.Text
+import org.eclipse.ui.ISelectionListener
+import org.eclipse.ui.IWorkbenchPart
+import org.eclipse.ui.part.ViewPart
+import scala.tools.eclipse.InteractiveCompilationUnit
+import scala.tools.eclipse.ui.InteractiveCompilationUnitEditor
+import org.eclipse.swt.graphics.Font
+import org.eclipse.jface.resource.JFaceResources
+
+class SpyView extends ViewPart {
+  private var textArea: Text = _
+
+  def setFocus() {
+    textArea.setFocus()
+  }
+
+  def createPartControl(parent: Composite) {
+    textArea = new Text(parent, SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL)
+    textArea.setFont(JFaceResources.getTextFont()) // fixed width font
+
+    getSite.getWorkbenchWindow().getSelectionService().addPostSelectionListener(listener)
+  }
+
+  override def dispose() {
+    super.dispose()
+    getSite.getWorkbenchWindow().getSelectionService().removePostSelectionListener(listener)
+  }
+
+  private def updateView(offset: Int, length: Int, part: IWorkbenchPart) {
+    textArea.setText("Offset: \t%s".format(offset.toString))
+    textArea.append("\nLength: \t%s".format(length.toString))
+
+    part match {
+      case icuEditor: InteractiveCompilationUnitEditor =>
+        for (cu <- icuEditor.getInteractiveCompilationUnit) {
+          cu.doWithSourceFile { (source, compiler) =>
+            import compiler._
+
+            val response = new Response[Tree]
+            compiler.askTypeAt(rangePos(source, offset, offset, offset + length), response)
+            response.get match {
+              case Left(tree) =>
+                textArea.append("\n\n============\n\nTree: \t\t" + tree.productPrefix)
+                textArea.append("\ntree.pos: \t%s".format(tree.pos))
+                textArea.append("\ntree.tpe: \t%s".format(tree.tpe))
+                textArea.append("\n\nsymbol: \t\t%s".format(tree.symbol))
+                for (sym <- Option(tree.symbol) if sym ne NoSymbol)
+                  textArea.append("\nsymbol.info: \t%s".format(tree.symbol.info))
+
+              case _ =>
+
+            }
+
+          }
+        }
+    }
+    textArea.setSelection(0, 0)
+  }
+
+  object listener extends ISelectionListener {
+    override def selectionChanged(sourcePart: IWorkbenchPart, selection: ISelection) {
+      selection match {
+        case textSelection: ITextSelection =>
+          updateView(textSelection.getOffset(), textSelection.getLength(), sourcePart)
+        case _ =>
+      }
+    }
+  }
+}