| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.custom; |
| |
| import org.eclipse.swt.*; |
| |
| /** |
| * Instances of this class represent bullets in the <code>StyledText</code>. |
| * <p> |
| * The hashCode() method in this class uses the values of the public |
| * fields to compute the hash value. When storing instances of the |
| * class in hashed collections, do not modify these fields after the |
| * object has been inserted. |
| * </p> |
| * <p> |
| * Application code does <em>not</em> need to explicitly release the |
| * resources managed by each instance when those instances are no longer |
| * required, and thus no <code>dispose()</code> method is provided. |
| * </p> |
| * |
| * @see StyledText#setLineBullet(int, int, Bullet) |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * |
| * @since 3.2 |
| */ |
| public class Bullet { |
| /** |
| * The bullet type. Possible values are: |
| * <ul> |
| * <li><code>ST.BULLET_DOT</code></li> |
| * <li><code>ST.BULLET_NUMBER</code></li> |
| * <li><code>ST.BULLET_LETTER_LOWER</code></li> |
| * <li><code>ST.BULLET_LETTER_UPPER</code></li> |
| * <li><code>ST.BULLET_TEXT</code></li> |
| * <li><code>ST.BULLET_CUSTOM</code></li> |
| * </ul> |
| */ |
| public int type; |
| |
| /** |
| * The bullet style. |
| */ |
| public StyleRange style; |
| |
| /** |
| * The bullet text. |
| */ |
| public String text; |
| |
| int[] linesIndices; |
| int count; |
| |
| /** |
| * Create a new bullet with the specified style, and type <code>ST.BULLET_DOT</code>. |
| * The style must have a glyph metrics set. |
| * |
| * @param style the style |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when the style or the glyph metrics are null</li> |
| * </ul> |
| */ |
| public Bullet(StyleRange style) { |
| this(ST.BULLET_DOT, style); |
| } |
| /** |
| * Create a new bullet the specified style and type. |
| * The style must have a glyph metrics set. |
| * |
| * @param type the bullet type |
| * @param style the style |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT when the style or the glyph metrics are null</li> |
| * </ul> |
| */ |
| public Bullet(int type, StyleRange style) { |
| if (style == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| if (style.metrics == null) SWT.error(SWT.ERROR_NULL_ARGUMENT); |
| this.type = type; |
| this.style = style; |
| } |
| void addIndices (int startLine, int lineCount) { |
| if (linesIndices == null) { |
| linesIndices = new int[lineCount]; |
| count = lineCount; |
| for (int i = 0; i < lineCount; i++) linesIndices[i] = startLine + i; |
| } else { |
| int modifyStart = 0; |
| while (modifyStart < count) { |
| if (startLine <= linesIndices[modifyStart]) break; |
| modifyStart++; |
| } |
| int modifyEnd = modifyStart; |
| while (modifyEnd < count) { |
| if (startLine + lineCount <= linesIndices[modifyEnd]) break; |
| modifyEnd++; |
| } |
| int newSize = modifyStart + lineCount + count - modifyEnd; |
| if (newSize > linesIndices.length) { |
| int[] newLinesIndices = new int[newSize]; |
| System.arraycopy(linesIndices, 0, newLinesIndices, 0, count); |
| linesIndices = newLinesIndices; |
| } |
| System.arraycopy(linesIndices, modifyEnd, linesIndices, modifyStart + lineCount, count - modifyEnd); |
| for (int i = 0; i < lineCount; i++) linesIndices[modifyStart + i] = startLine + i; |
| count = newSize; |
| } |
| } |
| int indexOf (int lineIndex) { |
| for (int i = 0; i < count; i++) { |
| if (linesIndices[i] == lineIndex) return i; |
| } |
| return -1; |
| } |
| @Override |
| public int hashCode() { |
| return style.hashCode() ^ type; |
| } |
| int[] removeIndices (int startLine, int replaceLineCount, int newLineCount, boolean update) { |
| if (count == 0) return null; |
| if (startLine > linesIndices[count - 1]) return null; |
| int endLine = startLine + replaceLineCount; |
| int delta = newLineCount - replaceLineCount; |
| for (int i = 0; i < count; i++) { |
| int index = linesIndices[i]; |
| if (startLine <= index) { |
| int j = i; |
| while (j < count) { |
| if (linesIndices[j] >= endLine) break; |
| j++; |
| } |
| if (update) { |
| for (int k = j; k < count; k++) linesIndices[k] += delta; |
| } |
| int[] redrawLines = new int[count - j]; |
| System.arraycopy(linesIndices, j, redrawLines, 0, count - j); |
| System.arraycopy(linesIndices, j, linesIndices, i, count - j); |
| count -= (j - i); |
| return redrawLines; |
| } |
| } |
| for (int i = 0; i < count; i++) linesIndices[i] += delta; |
| return null; |
| } |
| int size() { |
| return count; |
| } |
| } |