// /////////////////////////////
//  Makumba, Makumba tag library
//  Copyright (C) 2000-2003 http://www.makumba.org
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//  -------------
//  $Id: textViewer.java,v 2.6 2005/06/25 13:16:50 rosso_nero Exp $
//  $Name: makumba-0_6 $
/////////////////////////////////////

package org.makumba.view.html;

import java.util.Dictionary;

import org.makumba.HtmlUtils;
import org.makumba.view.FieldFormatter;
import org.makumba.view.RecordFormatter;

public class textViewer extends FieldViewer {
	static String[] params = { "default", "empty", "lineSeparator",
			"longLineLength", "html" };

	static String[][] paramValues = { null, null, null, null,
			{ "true", "false", "auto" } };

	public String[] getAcceptedParams() {
		return params;
	}

	public String[][] getAcceptedValue() {
		return paramValues;
	}

	static int screenLength = 30;

	private static final class SingletonHolder {
		static final FieldFormatter singleton = new textViewer();
	}

	private textViewer() {
	}

	public static FieldFormatter getInstance() {
		return SingletonHolder.singleton;
	}

	public String formatNotNull(RecordFormatter rf, int fieldIndex, Object o,
			Dictionary formatParams) {
		String txt = o.toString();
		String ht = (String) formatParams.get("html");
		if (ht != null
				&& (ht.equals("true") || ht.equals("auto")
						&& HtmlUtils.detectHtml(txt)))
			return txt;

		String startSeparator = "<p>";
		String endSeparator = "</p>";
		String s = (String) formatParams.get("lineSeparator");
		if (s != null) {
			startSeparator = s;
			endSeparator = "";
		}

		int n = getIntParam(rf, fieldIndex, formatParams, "longLineLength");
		if (n == -1)
			n = screenLength;

		if (HtmlUtils.maxLineLength(txt) > n)
			// special text formatting
			return HtmlUtils.text2html(txt, startSeparator, endSeparator);
		else if (txt.indexOf('\n') < 0)
			// single, short line of text
			return HtmlUtils.string2html(txt);
		else
			// else: text preformatted
			return "<pre style=\"margin:0px\">" + HtmlUtils.string2html(txt)
					+ "</pre>";
	}
}
