| /******************************************************************************* |
| * Copyright (c) 2004, 2008 John Krasnay and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * John Krasnay - initial API and implementation |
| * Igor Jacy Lino Campista - Java 5 warnings fixed (bug 311325) |
| *******************************************************************************/ |
| package org.eclipse.vex.ui.internal.handlers; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.vex.core.internal.VEXCorePlugin; |
| import org.eclipse.vex.core.internal.css.CSS; |
| import org.eclipse.vex.core.internal.css.Styles; |
| import org.eclipse.vex.core.internal.dom.Document; |
| import org.eclipse.vex.core.internal.dom.DocumentFragment; |
| import org.eclipse.vex.core.internal.dom.Element; |
| import org.eclipse.vex.core.internal.dom.RootElement; |
| import org.eclipse.vex.core.internal.widget.IVexWidget; |
| import org.eclipse.vex.ui.internal.swt.VexWidget; |
| |
| /** |
| * Splits the current block element, for instance to create new block/paragraph or table cell (usually by hitting the |
| * {@code Return} key). |
| * |
| * @see SplitItemHandler |
| */ |
| public class SplitBlockElementHandler extends AbstractVexWidgetHandler { |
| |
| @Override |
| public void execute(final VexWidget widget) throws ExecutionException { |
| Element element = widget.getCurrentElement(); |
| Styles styles = widget.getStyleSheet().getStyles(element); |
| while (!styles.isBlock()) { |
| element = element.getParentElement(); |
| if (element == null || element instanceof RootElement) { |
| return; // we reached the root element which cannot be split |
| } |
| styles = widget.getStyleSheet().getStyles(element); |
| } |
| splitElement(widget, element); |
| } |
| |
| /** |
| * Splits the given element. |
| * |
| * @param vexWidget |
| * IVexWidget containing the document. |
| * @param element |
| * Element to be split. |
| */ |
| protected void splitElement(final IVexWidget vexWidget, final Element element) { |
| |
| vexWidget.doWork(new Runnable() { |
| public void run() { |
| |
| long start = 0; |
| if (VEXCorePlugin.getInstance().isDebugging()) { |
| start = System.currentTimeMillis(); |
| } |
| |
| final Styles styles = vexWidget.getStyleSheet().getStyles(element); |
| |
| if (styles.getWhiteSpace().equals(CSS.PRE)) { |
| // can't call vexWidget.insertText() or we'll get an |
| // infinite loop |
| final Document doc = vexWidget.getDocument(); |
| final int offset = vexWidget.getCaretOffset(); |
| doc.insertText(offset, "\n"); |
| vexWidget.moveTo(offset + 1); |
| } else { |
| |
| // There may be a number of child elements below the given |
| // element. We cut out the tails of each of these elements |
| // and put them in a list of fragments to be reconstructed |
| // when |
| // we clone the element. |
| final List<Element> children = new ArrayList<Element>(); |
| final List<DocumentFragment> frags = new ArrayList<DocumentFragment>(); |
| Element child = vexWidget.getCurrentElement(); |
| while (true) { |
| children.add(child); |
| vexWidget.moveTo(child.getEndOffset(), true); |
| frags.add(vexWidget.getSelectedFragment()); |
| vexWidget.deleteSelection(); |
| vexWidget.moveTo(child.getEndOffset() + 1); |
| if (child == element) { |
| break; |
| } |
| child = child.getParentElement(); |
| } |
| |
| for (int i = children.size() - 1; i >= 0; i--) { |
| child = children.get(i); |
| final DocumentFragment frag = frags.get(i); |
| vexWidget.insertElement(child.clone()); |
| final int offset = vexWidget.getCaretOffset(); |
| if (frag != null) { |
| vexWidget.insertFragment(frag); |
| } |
| vexWidget.moveTo(offset); |
| } |
| } |
| |
| if (VEXCorePlugin.getInstance().isDebugging()) { |
| final long end = System.currentTimeMillis(); |
| System.out.println("split() took " + (end - start) + "ms"); |
| } |
| } |
| }); |
| } |
| } |