Mercurial > projects > dwt-mac
view dwt/custom/BidiSegmentEvent.d @ 13:f565d3a95c0a
Ported dwt.internal
author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Fri, 22 Aug 2008 16:46:34 +0200 |
parents | 380af2bdd8e5 |
children | 6337764516f1 |
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/******************************************************************************* * Copyright (c) 2000, 2005 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 * * Port to the D programming language: * Jacob Carlborg <jacob.carlborg@gmail.com> *******************************************************************************/ module dwt.custom.BidiSegmentEvent; import dwt.custom.StyledTextEvent; import dwt.events.TypedEvent; import dwt.dwthelper.string; /** * This event is sent to BidiSegmentListeners when a line is to * be measured or rendered in a bidi locale. The segments field is * used to specify text ranges in the line that should be treated as * separate segments for bidi reordering. Each segment will be reordered * and rendered separately. * <p> * The elements in the segments field specify the start offset of * a segment relative to the start of the line. They must follow * the following rules: * <ul> * <li>first element must be 0 * <li>elements must be in ascending order and must not have duplicates * <li>elements must not exceed the line length * </ul> * In addition, the last element may be set to the end of the line * but this is not required. * * The segments field may be left null if the entire line should * be reordered as is. * </p> * A BidiSegmentListener may be used when adjacent segments of * right-to-left text should not be reordered relative to each other. * For example, within a Java editor, you may wish multiple * right-to-left String literals to be reordered differently than the * bidi algorithm specifies. * * Example: * <pre> * stored line = "R1R2R3" + "R4R5R6" * R1 to R6 are right-to-left characters. The quotation marks * are part of the line text. The line is 13 characters long. * * segments = null: * entire line will be reordered and thus the two R2L segments * swapped (as per the bidi algorithm). * visual line (rendered on screen) = "R6R5R4" + "R3R2R1" * * segments = [0, 5, 8] * "R1R2R3" will be reordered, followed by [blank]+[blank] and * "R4R5R6". * visual line = "R3R2R1" + "R6R5R4" * </pre> */ public class BidiSegmentEvent : TypedEvent { /** * line start offset */ public int lineOffset; /** * line text */ public String lineText; /** * bidi segments, see above */ public int[] segments; static final long serialVersionUID = 3257846571587547957L; this (StyledTextEvent e) { super(e); lineOffset = e.detail; lineText = e.text; } }