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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwt.custom.Bullet;
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14
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15 import dwt.DWT;
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16 import dwt.custom.StyleRange;
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17 import dwt.custom.ST;
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18 import dwt.dwthelper.System;
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19
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20 /**
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21 * Instances of this class represent bullets in the <code>StyledText</code>.
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22 * <p>
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23 * The hashCode() method in this class uses the values of the public
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24 * fields to compute the hash value. When storing instances of the
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25 * class in hashed collections, do not modify these fields after the
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26 * object has been inserted.
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27 * </p>
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28 * <p>
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29 * Application code does <em>not</em> need to explicitly release the
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30 * resources managed by each instance when those instances are no longer
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31 * required, and thus no <code>dispose()</code> method is provided.
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32 * </p>
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33 *
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34 * @see StyledText#setLineBullet(int, int, Bullet)
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35 *
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36 * @since 3.2
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37 */
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38 public class Bullet {
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39 public int type;
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40 public StyleRange style;
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41 public char[] text;
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42 int[] linesIndices;
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43 int count;
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44
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45 /**
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46 * Create a new bullet the specified style, the type is set to ST.BULLET_DOT.
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47 * The style must have a glyph metrics set.
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48 *
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49 * @param style the style
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50 *
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51 * @exception IllegalArgumentException <ul>
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52 * <li>ERROR_NULL_ARGUMENT when the style or the glyph metrics are null</li>
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53 * </ul>
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54 */
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55 public this(StyleRange style) {
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56 this(ST.BULLET_DOT, style);
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57 }
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58 /**
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59 * Create a new bullet the specified style and type.
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60 * The style must have a glyph metrics set.
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61 *
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62 * @param style the style
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63 *
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64 * @exception IllegalArgumentException <ul>
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65 * <li>ERROR_NULL_ARGUMENT when the style or the glyph metrics are null</li>
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66 * </ul>
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67 */
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68 public this(int type, StyleRange style) {
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69 if (style is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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70 if (style.metrics is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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71 this.type = type;
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72 this.style = style;
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73 }
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74 void addIndices (int startLine, int lineCount) {
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75 if (linesIndices is null) {
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76 linesIndices = new int[lineCount];
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77 count = lineCount;
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78 for (int i = 0; i < lineCount; i++) linesIndices[i] = startLine + i;
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79 } else {
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80 int modifyStart = 0;
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81 while (modifyStart < count) {
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82 if (startLine <= linesIndices[modifyStart]) break;
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83 modifyStart++;
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84 }
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85 int modifyEnd = modifyStart;
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86 while (modifyEnd < count) {
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87 if (startLine + lineCount <= linesIndices[modifyEnd]) break;
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88 modifyEnd++;
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89 }
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90 int newSize = modifyStart + lineCount + count - modifyEnd;
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91 if (newSize > linesIndices.length) {
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92 int[] newLinesIndices = new int[newSize];
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93 System.arraycopy(linesIndices, 0, newLinesIndices, 0, count);
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94 linesIndices = newLinesIndices;
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95 }
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96 System.arraycopy(linesIndices, modifyEnd, linesIndices, modifyStart + lineCount, count - modifyEnd);
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97 for (int i = 0; i < lineCount; i++) linesIndices[modifyStart + i] = startLine + i;
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98 count = newSize;
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99 }
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100 }
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101 int indexOf (int lineIndex) {
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102 for (int i = 0; i < count; i++) {
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103 if (linesIndices[i] is lineIndex) return i;
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104 }
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105 return -1;
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106 }
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107 public override hash_t toHash() {
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108 return style.toHash() ^ type;
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109 }
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110 int[] removeIndices (int startLine, int replaceLineCount, int newLineCount, bool update) {
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111 if (count is 0) return null;
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112 if (startLine > linesIndices[count - 1]) return null;
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113 int endLine = startLine + replaceLineCount;
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114 int delta = newLineCount - replaceLineCount;
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115 for (int i = 0; i < count; i++) {
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116 int index = linesIndices[i];
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117 if (startLine <= index) {
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118 int j = i;
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119 while (j < count) {
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120 if (linesIndices[j] >= endLine) break;
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121 j++;
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122 }
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123 if (update) {
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124 for (int k = j; k < count; k++) linesIndices[k] += delta;
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125 }
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126 int[] redrawLines = new int[count - j];
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127 System.arraycopy(linesIndices, j, redrawLines, 0, count - j);
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128 System.arraycopy(linesIndices, j, linesIndices, i, count - j);
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129 count -= (j - i);
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130 return redrawLines;
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131 }
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132 }
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133 for (int i = 0; i < count; i++) linesIndices[i] += delta;
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134 return null;
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135 }
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136 int size() {
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137 return count;
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138 }
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139 }
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