[MNG-2244] PrettyPrintXMLWriter writes unix line endings always. Bring patch from plexus-utils as we can't use latest in maven yet.

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@397424 13f79535-47bb-0310-9956-ffa450edef68

maven-plugin-tools/maven-plugin-tools-api/src/main/java/org/apache/maven/tools/plugin/generator/PrettyPrintXMLWriter.java

@@ -0,0 +1,174 @@
+package org.apache.maven.tools.plugin.generator;
+
+import java.io.PrintWriter;
+import java.io.Writer;
+import java.util.LinkedList;
+
+/*
+ * Copyright 2001-2006 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Copied from plexus-utils 1.2 as we can't upgrade it yet.
+ * This class can be removed when a newer version of plexus-utils is included with Maven
+ * 
+ * @see org.codehaus.plexus.util.xml.PrettyPrintXMLWriter
+ */
+public class PrettyPrintXMLWriter
+    extends org.codehaus.plexus.util.xml.PrettyPrintXMLWriter
+{
+
+    private static final String LS = System.getProperty("line.separator");
+
+    private PrintWriter writer;
+
+    private String lineIndenter;
+
+    private int depth;
+
+    public PrettyPrintXMLWriter( PrintWriter writer, String lineIndenter )
+    {
+        this( writer, lineIndenter, null, null );
+    }
+
+    public PrettyPrintXMLWriter( Writer writer, String lineIndenter )
+    {
+        this( new PrintWriter( writer ), lineIndenter );
+    }
+
+    public PrettyPrintXMLWriter( PrintWriter writer )
+    {
+        this( writer, null, null );
+    }
+
+    public PrettyPrintXMLWriter( Writer writer )
+    {
+        this( new PrintWriter( writer ) );
+    }
+
+    public PrettyPrintXMLWriter( PrintWriter writer, String lineIndenter, String encoding, String doctype )
+    {
+        super( writer, lineIndenter, encoding, doctype );
+
+        setWriter( writer );
+
+        setLineIndenter( lineIndenter );
+    }
+
+    public PrettyPrintXMLWriter( Writer writer, String lineIndenter, String encoding, String doctype )
+    {
+        this( new PrintWriter( writer ), lineIndenter, encoding, doctype );
+    }
+
+    public PrettyPrintXMLWriter( PrintWriter writer, String encoding, String doctype )
+    {
+        this( writer, "  ", encoding, doctype );
+    }
+
+    public PrettyPrintXMLWriter( Writer writer, String encoding, String doctype )
+    {
+        this( new PrintWriter( writer ), encoding, doctype );
+    }
+
+    /**
+     * Write a string to the underlying writer
+     * @param str
+     */
+    private void write( String str )
+    {
+        getWriter().write( str );
+    }
+
+    /**
+     * Get the string used as line indenter
+     * @return the line indenter
+     */
+    protected String getLineIndenter(){
+        return lineIndenter;
+    }
+
+    /**
+     * Set the string used as line indenter 
+     * @param lineIndenter
+     */
+    protected void setLineIndenter( String lineIndenter ){
+        this.lineIndenter = lineIndenter;
+    }
+
+    /**
+     * Write the end of line character (using system line separator)
+     * and start new line with indentation 
+     */
+    protected void endOfLine()
+    {
+        write( LS );
+
+        for ( int i = 0; i < getDepth(); i++ )
+        {
+            write( getLineIndenter() );
+        }
+    }
+
+    /**
+     * Set the underlying writer
+     * @param writer
+     */
+    protected void setWriter( PrintWriter writer )
+    {
+        this.writer = writer;
+    }
+
+    /**
+     * Get the underlying writer
+     * @return the underlying writer
+     */
+    protected PrintWriter getWriter()
+    {
+        return writer;
+    }
+
+    /**
+     * Set the current depth in the xml indentation
+     * @param depth
+     */
+    protected void setDepth( int depth )
+    {
+        this.depth = depth;
+    }
+
+    /**
+     * Get the current depth in the xml indentation
+     * @return
+     */
+    protected int getDepth()
+    {
+        return depth;
+    }
+
+    public void startElement( String name )
+    {
+        super.startElement( name );
+
+        setDepth( getDepth() + 1 );
+    }
+
+    public void endElement()
+    {
+        super.endElement();
+
+        setDepth( getDepth() - 1 );
+    }
+
+}