| /****************************************************************************** |
| * Copyright (c) 2007 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| ****************************************************************************/ |
| |
| package org.eclipse.gmf.runtime.draw2d.ui.text; |
| |
| import java.util.List; |
| |
| import org.eclipse.draw2d.text.TextFlow; |
| import org.eclipse.draw2d.text.TextFragmentBox; |
| import org.eclipse.swt.graphics.Font; |
| |
| /** |
| * A single-line text layout (i.e. no word wrapping), that truncates the text if |
| * it does not all fit in the width available. |
| * |
| * @author satif, crevells |
| * @since 2.1 |
| * |
| */ |
| public class TruncatedSingleLineTextLayout |
| extends org.eclipse.draw2d.text.TextLayout { |
| |
| private String truncationString; |
| |
| /** |
| * Creates a new SimpleTextLayout with the given TextFlow |
| * |
| * @param flow |
| * the TextFlow |
| * @param truncationString |
| * the string to be used to show truncation (normally "...") |
| */ |
| public TruncatedSingleLineTextLayout(TextFlowEx flow, |
| String truncationString) { |
| super(flow); |
| this.truncationString = truncationString; |
| } |
| |
| /** |
| * Gets the string to be used to show truncation (normally "..."). |
| * |
| * @return the truncation string |
| */ |
| protected String getTruncationString() { |
| return truncationString; |
| } |
| |
| private FlowUtilitiesEx getFlowUtilities() { |
| return ((TextFlowEx) getFlowFigure()).getFlowUtilities(); |
| } |
| |
| private TextUtilitiesEx getTextUtilities() { |
| return ((TextFlowEx) getFlowFigure()).getTextUtilities(); |
| } |
| |
| protected void layout() { |
| TextFlow textFlow = (TextFlow) getFlowFigure(); |
| String text = textFlow.getText(); |
| List fragments = textFlow.getFragments(); |
| Font font = textFlow.getFont(); |
| |
| int ellipsisWidth = getTextUtilities().getTextExtents(truncationString, |
| font).width; |
| |
| TextFragmentBox fragment = getFragment(0, fragments); |
| fragment.length = text.length(); |
| fragment.offset = 0; |
| fragment.setWidth(-1); |
| fragment.setTruncated(false); |
| getFlowUtilities().setupFragmentEx(fragment, font, text); |
| |
| int remainingLineWidth = getContext().getRemainingLineWidth(); |
| |
| // if the text should be truncated... |
| if (remainingLineWidth > 0 && remainingLineWidth < fragment.getWidth()) { |
| |
| remainingLineWidth -= ellipsisWidth; |
| if (remainingLineWidth > 0) { |
| int subStringLength = getTextUtilities() |
| .getLargestSubstringConfinedTo(text, font, |
| remainingLineWidth); |
| fragment.length = subStringLength; |
| } else { |
| fragment.length = 0; |
| } |
| fragment.setTruncated(true); |
| fragment.setWidth(-1); |
| getFlowUtilities().setupFragmentEx(fragment, font, text); |
| } else { |
| fragment.setTruncated(false); |
| } |
| |
| getContext().addToCurrentLine(fragment); |
| getContext().endLine(); |
| |
| // Remove the remaining unused fragments. |
| int i = 1; |
| while (i < fragments.size()) |
| fragments.remove(i++); |
| } |
| |
| } |