package net.sourceforge.phpeclipse.phpeditor.html;

import java.io.StringWriter;
import java.util.HashSet;
import java.util.Set;

import net.sourceforge.phpeclipse.PHPeclipsePlugin;
import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
import net.sourceforge.phpeclipse.phpeditor.PHPSourceViewerConfiguration;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.text.source.SourceViewer;

/**
 * Modified from the XMLFormatter.  Some tags in HTML do not indent.
 * 
 * @fixme The HTML parser cannot recognize < tag> as tag due to the extra space.
 * 
 * @author chrisl
 */
public class HTMLFormatter implements IHTMLConstants {

	////////////////////////////////////////////////////////////////////////

	private static final String NAME = "HTMLFormatter";
	private static final boolean TRACE = false;
//	private static boolean VERBOSE = false;

	private static Set fBLOCK_TAG_SET;
	private static Set fSTART_TAG_SET;
	static {
		fBLOCK_TAG_SET = new HashSet();
		for (int i = 0; i < BLOCK_TAGS.length; ++i)
			fBLOCK_TAG_SET.add(BLOCK_TAGS[i]);
		//
		fSTART_TAG_SET = new HashSet();
		for (int i = 0; i < START_TAGS.length; ++i)
			fSTART_TAG_SET.add(START_TAGS[i]);
	}

	////////////////////////////////////////////////////////////////////////

	private PHPSourceViewerConfiguration fConfig;
	private SourceViewer fViewer;
	//
	private PHPEditor fEditor;
	private String fFilename;

	////////////////////////////////////////////////////////////////////////

	/**
	 * Constructor for XMLFormatter.
	 */
	public HTMLFormatter(PHPSourceViewerConfiguration cf, SourceViewer viewer) {
		fConfig=cf;
		fViewer = viewer;
		//
		fEditor = fConfig.getEditor();
	}

	////////////////////////////////////////////////////////////////////////

	/** 
	 * Formats the String <code>sourceString</code>,
	 * and returns a string containing the formatted version.
	 * 
	 * @param string the string to format
	 * @param indentationLevel the initial indentation level, used 
	 *      to shift left/right the entire source fragment. An initial indentation
	 *      level of zero has no effect.
	 * @param positions an array of positions to map. These are
	 *      character-based source positions inside the original source,
	 *     for which corresponding positions in the formatted source will
	 *     be computed (so as to relocate elements associated with the original
	 *     source). It updates the positions array with updated positions.
	 *     If set to <code>null</code>, then no positions are mapped.
	 * @param lineSeparator the line separator to use in formatted source,
	 *     if set to <code>null</code>, then the platform default one will be used.
	 * @return the formatted output string.
	 */
	public String format(
		String string,
		int indentationLevel,
		int[] positions,
		String lineSeparator,
		String inputname) {
		StringWriter ret = new StringWriter(2048);
		try {
			if (PHPeclipsePlugin.DEBUG) {
				System.err.println(NAME + ".format(): inputname=" + inputname);
			}
//			TidyHTMLParser parser = new TidyHTMLParser(new TidyConfiguration(fEditor, fViewer));
//			parser.setCompactFormat(
//				((Boolean) fViewer.getData(IConstants.KEY_COMPACT_FORMAT)).booleanValue());
//			parser.parse(new StringReader(string), inputname, new PrintWriter(ret));
//			if (parser.getParseErrors() != 0) {
//        PHPeclipsePlugin.log(IStatus.INFO, "Parse error");
//				return string;
//			}
			return ret.toString();
		} catch (Exception e) {
		//	PHPeclipsePlugin.error("Unknown parse error: "+e.getMessage(), null, fEditor.getEditorInput(), fViewer);
      PHPeclipsePlugin.log(IStatus.ERROR, e.getMessage());
			return string;
		}
	}

}