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/**
 * Copyright (C) 2011 Angelo Zerr  and Pascal Leclercq 
 *
 * 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 fr.opensagres.xdocreport.xhtml.extension;

import java.io.IOException;
import java.io.OutputStream;
import java.io.StringWriter;
import java.io.Writer;

public abstract class XHTMLPageContentBuffer extends AbstractContentBuffer
		implements XHTMLConstants {

	protected StringBuilder currentBuffer = null;
	protected int currentElementIndex;

	public XHTMLPageContentBuffer(int indent) {
		super(indent);
		this.currentBuffer = new StringBuilder();
	}

	public void startEndElement(String elementName) {
		startElementNotEnclosed(elementName);
		currentBuffer.append('/');	
		currentBuffer.append('>');	
	}
	
	public void startElement(String elementName) {
		startElement(elementName, true, getCurrentBuffer(), currentElementIndex);
		currentElementIndex++;
	}

	public void startElementNotEnclosed(String elementName) {
		startElement(elementName, false, getCurrentBuffer(),
				currentElementIndex);
		currentElementIndex++;
	}

	public void endElementNotEnclosed() {
		getCurrentBuffer().append('>');
	}

	public XHTMLPageContentBuffer setAttribute(String name, String value) {
		startAttribute(name).addAttributeValue(value, true).endAttribute();
		return this;
	}

	public XHTMLPageContentBuffer setAttribute(String name, Integer value) {
		setAttribute(name, String.valueOf(value));
		return this;
	}
	
	public XHTMLPageContentBuffer addAttributeValue(String value,
			boolean firstValue) {
		if (!firstValue) {
			getCurrentBuffer().append(' ');
		}
		getCurrentBuffer().append(value);
		return this;
	}

	public XHTMLPageContentBuffer startAttribute(String name) {
		getCurrentBuffer().append(' ').append(name).append("=\"");
		return this;
	}

	public XHTMLPageContentBuffer endAttribute() {
		getCurrentBuffer().append("\"");
		return this;
	}

	protected StringBuilder startElement(String elementName,
			boolean endsElement, StringBuilder buffer, int index) {
		doIndentIfNeeded(buffer, index);
		buffer.append('<');
		buffer.append(elementName);
		if (endsElement) {
			buffer.append('>');
		}
		return buffer;
	}

	protected void startElement(String elementName, boolean endsElement,
			Writer writer, int index) throws IOException {
		doIndentIfNeeded(writer, index);
		writer.write('<');
		writer.write(elementName);
		if (endsElement) {
			writer.write('>');
		}
	}

	protected void startElement(String elementName, boolean endsElement,
			OutputStream out, int index) throws IOException {
		doIndentIfNeeded(out, index);
		out.write('<');
		out.write(elementName.getBytes());
		if (endsElement) {
			out.write('>');
		}
	}

	public void endElement(String elementName) {
		currentElementIndex--;
		endElement(elementName, getCurrentBuffer(), currentElementIndex);
	}

	protected StringBuilder endElement(String elementName,
			StringBuilder buffer, int index) {
		doIndentIfNeeded(buffer, index);
		buffer.append('<');
		buffer.append('/');
		buffer.append(elementName);
		buffer.append('>');
		return buffer;
	}

	protected void endElement(String elementName, Writer writer, int index)
			throws IOException {
		doIndentIfNeeded(writer, index);
		writer.write('<');
		writer.write('/');
		writer.write(elementName);
		writer.write('>');
	}

	protected void endElement(String elementName, OutputStream out, int index)
			throws IOException {
		doIndentIfNeeded(out, index);
		out.write('<');
		out.write('/');
		out.write(elementName.getBytes());
		out.write('>');
	}

	@Override
	protected StringBuilder getCurrentBuffer() {
		return currentBuffer;
	}

	public void save(Writer writer) throws IOException {
		writer.write(getCurrentBuffer().toString());
	}

	public void save(OutputStream out) throws IOException {
		out.write(getCurrentBuffer().toString().getBytes());
	}

	@Override
	public String toString() {
		StringWriter writer = new StringWriter();
		try {
			save(writer);
		} catch (IOException e) {
			// Do nothing
		}
		return writer.toString();
	}
}