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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 dwtx.ui.internal.forms.widgets.Paragraph;
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14
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15 import dwtx.ui.internal.forms.widgets.ParagraphSegment;
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16 import dwtx.ui.internal.forms.widgets.Locator;
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17 import dwtx.ui.internal.forms.widgets.IHyperlinkSegment;
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18 import dwtx.ui.internal.forms.widgets.SelectionData;
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19
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20 import dwt.graphics.GC;
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21 import dwt.graphics.Rectangle;
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22 import dwtx.ui.forms.HyperlinkSettings;
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23
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24 import dwt.dwthelper.utils;
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25 import tango.util.collection.ArraySeq;
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26 import tango.util.collection.HashMap;
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27
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28 /**
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29 * @version 1.0
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30 * @author
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31 */
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32 public class Paragraph {
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33 public static const String HTTP = "http://"; //$NON-NLS-1$
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34
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35 alias ArraySeq!(ParagraphSegment) TArraySeqParagraphSegment;
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36 alias HashMap!(String,Object) Hashtable;
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37
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38 private TArraySeqParagraphSegment segments;
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39
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40 private bool addVerticalSpace = true;
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41
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42 public this(bool addVerticalSpace) {
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43 this.addVerticalSpace = addVerticalSpace;
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44 }
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45
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46 public int getIndent() {
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47 return 0;
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48 }
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49
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50 public bool getAddVerticalSpace() {
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51 return addVerticalSpace;
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52 }
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53
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54 /*
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55 * @see IParagraph#getSegments()
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56 */
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57 public ParagraphSegment[] getSegments() {
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58 if (segments is null)
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59 return new TArraySeqParagraphSegment;
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60 return segments
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61 .toArray();
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62 }
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63
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64 public void addSegment(ParagraphSegment segment) {
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65 if (segments is null)
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66 segments = new TArraySeqParagraphSegment;
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67 segments.append(segment);
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68 }
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69
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70 public void parseRegularText(String text, bool expandURLs, bool wrapAllowed,
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71 HyperlinkSettings settings, String fontId) {
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72 parseRegularText(text, expandURLs, wrapAllowed, settings, fontId, null);
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73 }
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74
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75 public void parseRegularText(String text, bool expandURLs, bool wrapAllowed,
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76 HyperlinkSettings settings, String fontId, String colorId) {
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77 if (text.length() is 0)
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78 return;
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79 if (expandURLs) {
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80 int loc = text.indexOf(HTTP);
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81
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82 if (loc is -1)
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83 addSegment(new TextSegment(text, fontId, colorId, wrapAllowed));
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84 else {
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85 int textLoc = 0;
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86 while (loc !is -1) {
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87 addSegment(new TextSegment(text.substring(textLoc, loc),
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88 fontId, colorId, wrapAllowed));
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89 bool added = false;
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90 for (textLoc = loc; textLoc < text.length(); textLoc++) {
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91 char c = text.charAt(textLoc);
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92 if (Character.isSpaceChar(c)) {
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93 addHyperlinkSegment(text.substring(loc, textLoc),
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94 settings, fontId);
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95 added = true;
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96 break;
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97 }
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98 }
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99 if (!added) {
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100 // there was no space - just end of text
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101 addHyperlinkSegment(text.substring(loc), settings,
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102 fontId);
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103 break;
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104 }
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105 loc = text.indexOf(HTTP, textLoc);
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106 }
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107 if (textLoc < text.length()) {
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108 addSegment(new TextSegment(text.substring(textLoc), fontId,
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109 colorId, wrapAllowed));
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110 }
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111 }
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112 } else {
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113 addSegment(new TextSegment(text, fontId, colorId, wrapAllowed));
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114 }
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115 }
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116
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117 private void addHyperlinkSegment(String text, HyperlinkSettings settings,
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118 String fontId) {
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119 TextHyperlinkSegment hs = new TextHyperlinkSegment(text, settings,
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120 fontId);
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121 hs.setWordWrapAllowed(false);
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122 hs.setHref(text);
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123 addSegment(hs);
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124 }
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125
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126 protected void computeRowHeights(GC gc, int width, Locator loc,
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127 int lineHeight, Hashtable resourceTable) {
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128 ParagraphSegment[] segments = getSegments();
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129 // compute heights
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130 Locator hloc = loc.create();
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131 ArrayList heights = new ArrayList();
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132 hloc.heights = heights;
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133 hloc.rowCounter = 0;
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134 int innerWidth = width - loc.marginWidth*2;
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135 for (int j = 0; j < segments.length; j++) {
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136 ParagraphSegment segment = segments[j];
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137 segment.advanceLocator(gc, innerWidth, hloc, resourceTable, true);
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138 }
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139 hloc.collectHeights();
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140 loc.heights = heights;
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141 loc.rowCounter = 0;
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142 }
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143
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144 public void layout(GC gc, int width, Locator loc, int lineHeight,
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145 Hashtable resourceTable, IHyperlinkSegment selectedLink) {
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146 ParagraphSegment[] segments = getSegments();
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147 //int height;
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148 if (segments.length > 0) {
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149 /*
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150 if (segments[0] instanceof TextSegment
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151 && ((TextSegment) segments[0]).isSelectable())
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152 loc.x += 1;
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153 */
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154 // compute heights
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155 if (loc.heights is null)
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156 computeRowHeights(gc, width, loc, lineHeight, resourceTable);
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157 for (int j = 0; j < segments.length; j++) {
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158 ParagraphSegment segment = segments[j];
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159 bool doSelect = false;
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160 if (selectedLink !is null && segment.equals(selectedLink))
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161 doSelect = true;
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162 segment.layout(gc, width, loc, resourceTable, doSelect);
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163 }
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164 loc.heights = null;
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165 loc.y += loc.rowHeight;
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166 } else {
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167 loc.y += lineHeight;
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168 }
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169 }
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170
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171 public void paint(GC gc, Rectangle repaintRegion,
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172 Hashtable resourceTable, IHyperlinkSegment selectedLink,
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173 SelectionData selData) {
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174 ParagraphSegment[] segments = getSegments();
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175
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176 for (int i = 0; i < segments.length; i++) {
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177 ParagraphSegment segment = segments[i];
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178 if (!segment.intersects(repaintRegion))
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179 continue;
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180 bool doSelect = false;
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181 if (selectedLink !is null && segment.equals(selectedLink))
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182 doSelect = true;
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183 segment.paint(gc, false, resourceTable, doSelect, selData, repaintRegion);
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184 }
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185 }
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186
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187 public void computeSelection(GC gc, Hashtable resourceTable, IHyperlinkSegment selectedLink,
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188 SelectionData selData) {
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189 ParagraphSegment[] segments = getSegments();
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190
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191 for (int i = 0; i < segments.length; i++) {
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192 ParagraphSegment segment = segments[i];
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193 //bool doSelect = false;
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194 //if (selectedLink !is null && segment.equals(selectedLink))
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195 //doSelect = true;
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196 segment.computeSelection(gc, resourceTable, selData);
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197 }
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198 }
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199
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200 public String getAccessibleText() {
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201 ParagraphSegment[] segments = getSegments();
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202 StringWriter swriter = new StringWriter();
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203 PrintWriter writer = new PrintWriter(swriter);
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204 for (int i = 0; i < segments.length; i++) {
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205 ParagraphSegment segment = segments[i];
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206 if ( auto ts = cast(TextSegment)segment ) {
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207 String text = ts.getText();
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208 writer.print(text);
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209 }
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210 }
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211 writer.println();
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212 swriter.flush();
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213 return swriter.toString();
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214 }
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215
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216 public ParagraphSegment findSegmentAt(int x, int y) {
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217 if (segments !is null) {
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218 for (int i = 0; i < segments.size(); i++) {
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219 ParagraphSegment segment = cast(ParagraphSegment) segments.get(i);
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220 if (segment.contains(x, y))
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221 return segment;
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222 }
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223 }
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224 return null;
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225 }
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226 public void clearCache(String fontId) {
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227 if (segments !is null) {
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228 for (int i = 0; i < segments.size(); i++) {
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229 ParagraphSegment segment = cast(ParagraphSegment) segments.get(i);
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230 segment.clearCache(fontId);
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231 }
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232 }
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233 }
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234 }
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