| /* |
| * Copyright (c) 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM - Initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| */ |
| package org.eclipse.wst.html.ui.internal.autoedit; |
| |
| import org.eclipse.core.runtime.Preferences; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.DocumentCommand; |
| import org.eclipse.jface.text.IAutoEditStrategy; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.wst.html.core.internal.HTMLCorePlugin; |
| import org.eclipse.wst.html.core.internal.preferences.HTMLCorePreferenceNames; |
| import org.eclipse.wst.html.ui.internal.Logger; |
| |
| /** |
| * AutoEditStrategy to handle characters inserted when Tab key is pressed |
| */ |
| public class AutoEditStrategyForTabs implements IAutoEditStrategy { |
| |
| public void customizeDocumentCommand(IDocument document, DocumentCommand command) { |
| // spaces for tab character |
| if (command.text != null && command.text.length() > 0 && command.text.charAt(0) == '\t') |
| smartInsertForTab(command, document); |
| } |
| |
| /** |
| * Insert spaces for tabs |
| * |
| * @param command |
| */ |
| private void smartInsertForTab(DocumentCommand command, IDocument document) { |
| // tab key was pressed. now check preferences to see if need to insert |
| // spaces instead of tab |
| Preferences preferences = HTMLCorePlugin.getDefault().getPluginPreferences(); |
| if (HTMLCorePreferenceNames.SPACE.equals(preferences.getString(HTMLCorePreferenceNames.INDENTATION_CHAR))) { |
| int indentationWidth = preferences.getInt(HTMLCorePreferenceNames.INDENTATION_SIZE); |
| |
| StringBuffer indent = new StringBuffer(); |
| if (indentationWidth != 0) { |
| int indentSize = indentationWidth; |
| try { |
| IRegion firstLine = document.getLineInformationOfOffset(command.offset); |
| int offsetInLine = command.offset - firstLine.getOffset(); |
| int remainder = offsetInLine % indentationWidth; |
| |
| indentSize = indentationWidth - remainder; |
| } catch (BadLocationException e) { |
| Logger.log(Logger.WARNING_DEBUG, e.getMessage(), e); |
| } |
| |
| for (int i = 0; i < indentSize; i++) |
| indent.append(' '); |
| } |
| |
| // replace \t characters with spaces |
| command.text = indent.toString(); |
| } |
| } |
| } |