/*
* Copyright (C) 2006, 2007 Dennis Hunziker, Ueli Kistler
* Copyright (C) 2007 Reto Schuettel, Robin Stocker
*
* IFS Institute for Software, HSR Rapperswil, Switzerland
*
*/
package org.python.pydev.refactoring.ast.visitors.position;
import org.python.pydev.parser.jython.SimpleNode;
import org.python.pydev.parser.jython.ast.Assert;
import org.python.pydev.parser.jython.ast.Assign;
import org.python.pydev.parser.jython.ast.Attribute;
import org.python.pydev.parser.jython.ast.AugAssign;
import org.python.pydev.parser.jython.ast.BinOp;
import org.python.pydev.parser.jython.ast.BoolOp;
import org.python.pydev.parser.jython.ast.Call;
import org.python.pydev.parser.jython.ast.Compare;
import org.python.pydev.parser.jython.ast.Delete;
import org.python.pydev.parser.jython.ast.Exec;
import org.python.pydev.parser.jython.ast.Expr;
import org.python.pydev.parser.jython.ast.GeneratorExp;
import org.python.pydev.parser.jython.ast.Import;
import org.python.pydev.parser.jython.ast.ImportFrom;
import org.python.pydev.parser.jython.ast.Print;
import org.python.pydev.parser.jython.ast.Suite;
import org.python.pydev.parser.jython.ast.TryFinally;
import org.python.pydev.parser.jython.ast.VisitorBase;
public class IndentVisitor extends VisitorBase {
private static final int DEFAULT_INDENT = 4;
private int indent;
public IndentVisitor() {
this.indent = DEFAULT_INDENT;
}
public int getIndent() {
return indent;
}
private void handleDefault(SimpleNode node) {
// For a node that is indented one level, beginColumn is 5 (assuming an
// indentation of 4 spaces), so subtract 1.
this.indent = node.beginColumn - 1;
}
@Override
public void traverse(SimpleNode node) throws Exception {
// ignore
}
@Override
protected Object unhandled_node(SimpleNode node) throws Exception {
handleDefault(node);
return null;
}
public void visit(SimpleNode node) throws Exception {
if (node != null) {
node.accept(this);
}
}
public Object visitAssert(Assert node) throws Exception {
handleDefault(node);
this.indent -= 7;
return null;
}
public Object visitAssign(Assign node) throws Exception {
visit(node.targets[0]);
return null;
}
public Object visitAttribute(Attribute node) throws Exception {
visit(node.value);
return null;
}
public Object visitAugAssign(AugAssign node) throws Exception {
visit(node.target);
return null;
}
public Object visitBinOp(BinOp node) throws Exception {
visit(node.left);
return null;
}
public Object visitBoolOp(BoolOp node) throws Exception {
visit(node.values[0]);
return null;
}
public Object visitCall(Call node) throws Exception {
visit(node.func);
return null;
}
public Object visitCompare(Compare node) throws Exception {
visit(node.left);
return null;
}
public Object visitDelete(Delete node) throws Exception {
handleDefault(node);
this.indent -= 4;
return null;
}
public Object visitExec(Exec node) throws Exception {
visit(node);
this.indent -= 5;
return null;
}
public Object visitExpr(Expr node) throws Exception {
visit(node.value);
return null;
}
public Object visitGeneratorExp(GeneratorExp node) throws Exception {
visit(node.elt);
return null;
}
@Override
public Object visitImport(Import node) throws Exception {
this.indent = node.beginColumn;
this.indent -= "import ".length();
return null;
}
@Override
public Object visitImportFrom(ImportFrom node) throws Exception {
this.indent = node.beginColumn;
this.indent -= "from ".length();
return null;
}
public Object visitPrint(Print node) throws Exception {
handleDefault(node);
this.indent -= 6;
return null;
}
public Object visitSuite(Suite node) throws Exception {
visit(node.body[0]);
return null;
}
public Object visitTryFinally(TryFinally node) throws Exception {
handleDefault(node);
return null;
}
}