Add line number tracking in elements parsed using LuaParser.

src/jse/org/luaj/vm2/ast/Chunk.java

@@ -21,7 +21,7 @@
 ******************************************************************************/
 package org.luaj.vm2.ast;
 
-public class Chunk {
+public class Chunk extends SyntaxElement {
 	public final Block block;
 	
 	public Chunk(Block b) {

src/jse/org/luaj/vm2/ast/Exp.java

@@ -25,7 +25,7 @@ import org.luaj.vm2.Lua;
 import org.luaj.vm2.LuaValue;
 
 abstract
-public class Exp {
+public class Exp extends SyntaxElement {
 	abstract public void accept(Visitor visitor);
 
 	public static Exp constant(LuaValue value) {

src/jse/org/luaj/vm2/ast/FuncArgs.java

@@ -26,7 +26,7 @@ import java.util.List;
 
 import org.luaj.vm2.LuaString;
 
-public class FuncArgs {
+public class FuncArgs extends SyntaxElement {
 
 	public final List<Exp> exps;
 	

src/jse/org/luaj/vm2/ast/FuncBody.java

@@ -21,7 +21,7 @@
 ******************************************************************************/
 package org.luaj.vm2.ast;
 
-public class FuncBody {
+public class FuncBody extends SyntaxElement {
 	public ParList parlist;
 	public Block block;
 	public NameScope scope;

src/jse/org/luaj/vm2/ast/FuncName.java

@@ -24,7 +24,7 @@ package org.luaj.vm2.ast;
 import java.util.ArrayList;
 import java.util.List;
 
-public class FuncName {
+public class FuncName extends SyntaxElement {
 	// example: a.b.c.d:e
 	
 	// initial base name: "a"

src/jse/org/luaj/vm2/ast/ParList.java

@@ -24,7 +24,7 @@ package org.luaj.vm2.ast;
 import java.util.ArrayList;
 import java.util.List;
 
-public class ParList {
+public class ParList extends SyntaxElement {
 	public static final List<Name> EMPTY_NAMELIST = new ArrayList<Name>();
 	public static final ParList EMPTY_PARLIST = new ParList(EMPTY_NAMELIST,false);
 	

src/jse/org/luaj/vm2/ast/Stat.java

@@ -26,7 +26,7 @@ import java.util.List;
 import org.luaj.vm2.ast.Exp.VarExp;
 
 abstract
-public class Stat {
+public class Stat extends SyntaxElement {
 	public abstract void accept(Visitor visitor);
 
 	public static Stat block(Block block) {

src/jse/org/luaj/vm2/ast/SyntaxElement.java

@@ -0,0 +1,40 @@
+/*******************************************************************************
+* Copyright (c) 2012 Luaj.org. All rights reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+* 
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+* THE SOFTWARE.
+******************************************************************************/
+package org.luaj.vm2.ast;
+
+/** Base class for syntax elements of the parse tree that appear in source files.
+ * The LuaParser class will fill these values out during parsing for use in 
+ * syntax highlighting, for example.
+ */
+public class SyntaxElement {
+	/** The line number on which the element begins. */
+	public int beginLine;
+	
+	/** The column at which the element begins. */
+	public short beginColumn;
+	
+	/** The line number on which the element ends. */
+	public int endLine;
+
+	/** The column at which the element ends. */
+	public short endColumn;
+}

src/jse/org/luaj/vm2/ast/TableField.java

@@ -21,7 +21,7 @@
 ******************************************************************************/
 package org.luaj.vm2.ast;
 
-public class TableField {
+public class TableField extends SyntaxElement {
 
 	public final Exp index;
 	public final String name;

src/jse/org/luaj/vm2/parser/SimpleCharStream.java

@@ -30,10 +30,10 @@ public class SimpleCharStream
   protected char[] buffer;
   protected int maxNextCharInd = 0;
   protected int inBuf = 0;
-  protected int tabSize = 8;
+  protected int tabSize = 1;
 
-  protected void setTabSize(int i) { tabSize = i; }
-  protected int getTabSize(int i) { return tabSize; }
+  public void setTabSize(int i) { tabSize = i; }
+  public int getTabSize(int i) { return tabSize; }
 
 
   protected void ExpandBuff(boolean wrapAround)