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The source code/* * 15:52:56 27/11/99 * * TabsToSpaces.java - By Slava Pestov * Copyright (C) 1999 Romain Guy * * This free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ package org.jext.actions; import javax.swing.text.Element; import org.jext.*; import javax.swing.text.Document; import java.awt.event.ActionEvent; import javax.swing.text.BadLocationException; public class TabsToSpaces extends MenuAction implements EditAction { public TabsToSpaces() { super("tabs_to_spaces"); } public void actionPerformed(ActionEvent evt) { JextTextArea textArea = getTextArea(evt); textArea.beginCompoundEdit(); Document doc = textArea.getDocument(); try { Element map = doc.getDefaultRootElement(); int count = map.getElementCount(); for (int i = 0; i < count; i++) { Element lineElement = map.getElement(i); int start = lineElement.getStartOffset(); int end = lineElement.getEndOffset() - 1; end -= start; int tabSize = textArea.getTabSize(); String text = doTabsToSpaces(textArea.getText(start, end), tabSize); doc.remove(start, end); doc.insertString(start, text, null); } } catch (BadLocationException ble) { } textArea.endCompoundEdit(); } private String doTabsToSpaces(String in, int tabSize) { StringBuffer buf = new StringBuffer(); int width = 0; for (int i = 0; i < in.length(); i++) { switch (in.charAt(i)) { case '\t': int count = tabSize - (width % tabSize); width += count; while(--count >= 0) buf.append(' '); break; case '\n': width = 0; buf.append(in.charAt(i)); break; default: width++; buf.append(in.charAt(i)); break; } } return buf.toString(); } } // End of TabsToSpaces.java |
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