/*
* $Id: PrettyPrintWriter.java 651946 2008-04-27 13:41:38Z apetrelli $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.struts2.interceptor.debugging;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.Stack;
public class PrettyPrintWriter {
private final PrintWriter writer;
private final Stack<String> elementStack = new Stack<String>();
private final char[] lineIndenter;
private boolean tagInProgress;
private int depth;
private boolean readyForNewLine;
private boolean tagIsEmpty;
private String newLine;
private boolean escape = true;
private static final char[] NULL = "�".toCharArray();
private static final char[] AMP = "&".toCharArray();
private static final char[] LT = "<".toCharArray();
private static final char[] GT = ">".toCharArray();
private static final char[] SLASH_R = "
".toCharArray();
private static final char[] QUOT = """.toCharArray();
private static final char[] APOS = "'".toCharArray();
private static final char[] CLOSE = "</".toCharArray();
public PrettyPrintWriter(Writer writer, char[] lineIndenter, String newLine) {
this.writer = new PrintWriter(writer);
this.lineIndenter = lineIndenter;
this.newLine = newLine;
}
public PrettyPrintWriter(Writer writer, char[] lineIndenter) {
this(writer, lineIndenter, "\n");
}
public PrettyPrintWriter(Writer writer, String lineIndenter, String newLine) {
this(writer, lineIndenter.toCharArray(), newLine);
}
public PrettyPrintWriter(Writer writer, String lineIndenter) {
this(writer, lineIndenter.toCharArray());
}
public PrettyPrintWriter(Writer writer) {
this(writer, new char[]{' ', ' '});
}
public void startNode(String name) {
tagIsEmpty = false;
finishTag();
writer.write('<');
writer.write(name);
elementStack.push(name);
tagInProgress = true;
depth++;
readyForNewLine = true;
tagIsEmpty = true;
}
public void setValue(String text) {
readyForNewLine = false;
tagIsEmpty = false;
finishTag();
writeText(writer, text);
}
public void addAttribute(String key, String value) {
writer.write(' ');
writer.write(key);
writer.write('=');
writer.write('\"');
writeAttributeValue(writer, value);
writer.write('\"');
}
protected void writeAttributeValue(PrintWriter writer, String text) {
writeText(text);
}
protected void writeText(PrintWriter writer, String text) {
writeText(text);
}
private void writeText(String text) {
int length = text.length();
for (int i = 0; i < length; i++) {
char c = text.charAt(i);
switch (c) {
case '\0':
this.writer.write(NULL);
break;
case '&':
this.writer.write(AMP);
break;
case '<':
this.writer.write(LT);
break;
case '>':
this.writer.write(GT);
break;
case '"':
this.writer.write(QUOT);
break;
case '\'':
//for some reason IE just doesn't like this when we use it from ObjectToHtmlWriter
//it works on FF and Opera
if (escape)
this.writer.write(APOS);
else
this.writer.write(c);
break;
case '\r':
this.writer.write(SLASH_R);
break;
default:
this.writer.write(c);
}
}
}
public void endNode() {
depth--;
if (tagIsEmpty) {
writer.write('/');
readyForNewLine = false;
finishTag();
elementStack.pop();
} else {
finishTag();
writer.write(CLOSE);
writer.write((String)elementStack.pop());
writer.write('>');
}
readyForNewLine = true;
if (depth == 0 ) {
writer.flush();
}
}
private void finishTag() {
if (tagInProgress) {
writer.write('>');
}
tagInProgress = false;
if (readyForNewLine) {
endOfLine();
}
readyForNewLine = false;
tagIsEmpty = false;
}
protected void endOfLine() {
writer.write(newLine);
for (int i = 0; i < depth; i++) {
writer.write(lineIndenter);
}
}
public void flush() {
writer.flush();
}
public void close() {
writer.close();
}
public boolean isEscape() {
return escape;
}
public void setEscape(boolean escape) {
this.escape = escape;
}
}
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