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annotate dwtx/draw2d/text/InlineFlow.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 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.draw2d.text.InlineFlow;
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14
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15 import dwt.dwthelper.utils;
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16 import dwtx.dwtxhelper.Collection;
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17
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18 import dwt.DWT;
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19 import dwtx.draw2d.Border;
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20 import dwtx.draw2d.ColorConstants;
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21 import dwtx.draw2d.Graphics;
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22 import dwtx.draw2d.geometry.Rectangle;
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23 import dwtx.draw2d.text.FlowFigure;
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24 import dwtx.draw2d.text.FlowFigureLayout;
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25 import dwtx.draw2d.text.FlowBox;
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26 import dwtx.draw2d.text.InlineFlowLayout;
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27 import dwtx.draw2d.text.FlowBorder;
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28
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29 /**
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30 * A <code>FlowFigure</code> represented by multiple <code>LineBox</code> fragments. An
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31 * <code>InlineFlow</code>'s parent must be either a {@link BlockFlow} or another
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32 * InlineFlow.
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33 *
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34 * <P>An InlineFlow may contain other InlineFlow figures.
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35 *
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36 * <P>WARNING: This class is not intended to be subclassed by clients.
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37 * @author Randy Hudson
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38 * @since 2.0
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39 */
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40 public class InlineFlow : FlowFigure {
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41
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42 List fragments;
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43
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44 public this(){
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45 fragments = new ArrayList(1);
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46 }
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47
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48 /**
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49 * Iterates over the children to find the width before a line-break is encountered.
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50 * @see dwtx.draw2d.text.FlowFigure#addLeadingWordRequirements(int[])
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51 */
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52 public bool addLeadingWordRequirements(int[] width) {
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53 Iterator iter = getChildren().iterator();
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54 while (iter.hasNext()) {
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55 if ((cast(FlowFigure)iter.next()).addLeadingWordRequirements(width))
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56 return true;
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57 }
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58 return false;
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59 }
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60
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61 /**
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62 * Extended to return false if the point is not also contained by at least one fragment.
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63 * @return <code>true</code> if a fragment contains the given point
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64 * @param x the relative x coordinate
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65 * @param y the relative y coordinate
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66 */
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67 public bool containsPoint(int x, int y) {
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68 if (super.containsPoint(x, y)) {
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69 List frags = getFragments();
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70 for (int i = 0; i < frags.size(); i++)
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71 if ((cast(FlowBox)frags.get(i)).containsPoint(x, y))
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72 return true;
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73 }
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74
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75 return false;
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76 }
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77
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78 /**
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79 * @see FlowFigure#createDefaultFlowLayout()
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80 */
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81 protected FlowFigureLayout createDefaultFlowLayout() {
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82 return new InlineFlowLayout(this);
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83 }
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84
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85 /**
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86 * Returns the <code>FlowBox</code> fragments contained in this InlineFlow. The returned
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87 * list should not be modified.
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88 * @return The fragments
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89 */
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90 public List getFragments() {
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91 return fragments;
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92 }
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93
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94 /**
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95 * Overridden to paint a {@link FlowBorder} if present, and draw selection. The border is
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96 * painted first, followed by selection which is generally done in XOR, which still allows
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97 * the border to be seen.
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98 * @param graphics the graphics
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99 */
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100 protected void paintBorder(Graphics graphics) {
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101 if (getBorder() !is null) {
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102 FlowBorder fb = cast(FlowBorder)getBorder();
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103 List frags = getFragments();
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104 Rectangle where = new Rectangle();
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105 int sides;
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106 for (int i = 0; i < frags.size(); i++) {
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107 FlowBox box = cast(FlowBox)frags.get(i);
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108
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109 where.x = box.getX();
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110 where.width = box.getWidth();
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111 where.y = -box.getAscentWithBorder();
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112 where.height = box.getDescentWithBorder() - where.y;
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113 where.y += box.getBaseline();
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114 sides = 0;
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115 if (i is 0)
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116 sides = DWT.LEAD;
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117 if (i is frags.size() - 1)
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118 sides |= DWT.TRAIL;
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119 fb.paint(this, graphics, where, sides);
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120 }
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121 graphics.restoreState();
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122 }
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123 if (selectionStart !is -1)
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124 paintSelection(graphics);
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125 }
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126
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127 /**
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128 * Renders the XOR selection rectangles to the graphics.
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129 * @param graphics the graphics to paint on
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130 * @since 3.1
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131 */
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132 protected void paintSelection(Graphics graphics) {
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133 graphics.restoreState();
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134 graphics.setXORMode(true);
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135 graphics.setBackgroundColor(ColorConstants.white);
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136 List list = getFragments();
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137 FlowBox box;
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138 for (int i = 0; i < list.size(); i++) {
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139 box = cast(FlowBox)list.get(i);
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140 int top = box.getLineRoot().getVisibleTop();
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141 int bottom = box.getLineRoot().getVisibleBottom();
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142 graphics.fillRectangle(box.getX(), top, box.getWidth(), bottom - top);
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143 }
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144 }
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145
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146 /**
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147 * @see FlowFigure#postValidate()
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148 */
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149 public void postValidate() {
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150 List list = getFragments();
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151 FlowBox box;
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152 int left = Integer.MAX_VALUE, top = left;
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153 int right = Integer.MIN_VALUE, bottom = right;
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154
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155 for (int i = 0; i < list.size(); i++) {
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156 box = cast(FlowBox)list.get(i);
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157 left = Math.min(left, box.getX());
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158 right = Math.max(right, box.getX() + box.getWidth());
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159 top = Math.min(top, box.getLineRoot().getVisibleTop());
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160 bottom = Math.max(bottom, box.getLineRoot().getVisibleBottom());
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161 }
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162
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163 setBounds(new Rectangle(left, top, right - left, bottom - top));
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164 repaint();
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165 list = getChildren();
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166 for (int i = 0; i < list.size(); i++)
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167 (cast(FlowFigure)list.get(i)).postValidate();
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168 }
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169
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170 /**
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171 * Overridden to assert that only {@link FlowBorder} is used. <code>null</code> is still a
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172 * valid value as well.
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173 * @param border <code>null</code> or a FlowBorder
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174 */
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175 public void setBorder(Border border) {
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176 if (border is null || null !is cast(FlowBorder)border )
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177 super.setBorder(border);
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178 else
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179 throw new RuntimeException("Border must be an instance of FlowBorder"); //$NON-NLS-1$
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180 }
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181
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182 }