/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
package net.sourceforge.phpdt.internal.ui.text.template;

import net.sourceforge.phpdt.internal.corext.template.TemplateMessages;
import net.sourceforge.phpdt.internal.ui.text.java.IPHPCompletionProposal;
import net.sourceforge.phpeclipse.PHPeclipsePlugin;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Shell;
//import net.sourceforge.phpdt.internal.ui.text.link.LinkedPositionManager;
//import net.sourceforge.phpdt.internal.ui.text.link.LinkedPositionUI;
//import net.sourceforge.phpdt.internal.ui.util.ExceptionHandler;

/**
 * A PHP identifier proposal.
 */
public abstract class AbstractProposal implements IPHPCompletionProposal {
	protected IRegion fSelectedRegion; // initialized by apply()
	protected final ITextViewer fViewer;
	
	public AbstractProposal(ITextViewer viewer) {
		fViewer = viewer;
	}
	protected static String textToHTML(String string) {
    StringBuffer buffer = new StringBuffer(string.length());
    buffer.append("<pre>"); //$NON-NLS-1$

    for (int i = 0; i != string.length(); i++) {
      char ch = string.charAt(i);

      switch (ch) {
        case '&' :
          buffer.append("&amp;"); //$NON-NLS-1$
          break;

        case '<' :
          buffer.append("&lt;"); //$NON-NLS-1$
          break;

        case '>' :
          buffer.append("&gt;"); //$NON-NLS-1$
          break;

        case '\t' :
          buffer.append("    "); //$NON-NLS-1$
          break;

        case '\n' :
          buffer.append("<br>"); //$NON-NLS-1$
          break;

        default :
          buffer.append(ch);
          break;
      }
    }

    buffer.append("</pre>"); //$NON-NLS-1$
    return buffer.toString();
  }

	/*
	 * @see ICompletionProposal#getSelection(IDocument)
	 */
	public Point getSelection(IDocument document) {
		return new Point(fSelectedRegion.getOffset(), fSelectedRegion.getLength());
	}

	protected void handleException(CoreException e) {
		Shell shell = fViewer.getTextWidget().getShell();
		PHPeclipsePlugin.log(e);
		//		ExceptionHandler.handle(e, shell, ObfuscatorMessages.getString("TemplateEvaluator.error.title"), null); //$NON-NLS-1$
	}

	protected void openErrorDialog(BadLocationException e) {
		Shell shell = fViewer.getTextWidget().getShell();
		MessageDialog.openError(shell, TemplateMessages.getString("TemplateEvaluator.error.title"), e.getMessage()); //$NON-NLS-1$
	}
}