/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/indent/WhitespaceRule.java
Java | 80 lines | 32 code | 8 blank | 40 comment | 6 complexity | 5cbd1ed845372e5bd12f5f615f83fee9 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
- /*
- * WhitespaceRule.java
- * :tabSize=8:indentSize=8:noTabs=false:
- * :folding=explicit:collapseFolds=1:
- *
- * Copyright (C) 2007 Marcelo Vanzin
- *
- * This program is 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.gjt.sp.jedit.indent;
- import java.util.List;
- import org.gjt.sp.jedit.buffer.JEditBuffer;
- /**
- * Whitespace rule. This rule cancels all indent actions in the
- * following case:
- *
- * <ul>
- * <li>The previous line is all whitespace</li>
- * <li>The current line is not empty</li>
- * </ul>
- *
- * <p>The result is that this rule won't allow the indentation to be
- * increased, only decreased (by rules triggered by unindentThisLine).
- * If the requirements above do not apply, this rule does nothing.</p>
- *
- * @author Marcelo Vanzin
- * @version $Id: WhitespaceRule.java 15614 2009-06-30 07:21:56Z voituk $
- * @since jEdit 4.3pre10
- */
- public class WhitespaceRule implements IndentRule
- {
- public void apply(JEditBuffer buffer, int thisLineIndex,
- int prevLineIndex, int prevPrevLineIndex,
- List<IndentAction> indentActions)
- {
- /* Don't apply this rule if the current line is empty. */
- CharSequence current = buffer.getLineSegment(thisLineIndex);
- boolean found = false;
- for (int i = 0; i < current.length(); i++)
- {
- if (!Character.isWhitespace(current.charAt(i)))
- {
- found = true;
- break;
- }
- }
- if (!found)
- return;
- /* Check if the previous line is empty. */
- if (prevLineIndex >= 0) {
- CharSequence previous = buffer.getLineSegment(prevLineIndex);
- for (int i = 0; i < previous.length(); i++)
- {
- if (!Character.isWhitespace(previous.charAt(i)))
- return;
- }
- }
- indentActions.add(new IndentAction.NoIncrease());
- }
- }