Mercurial > projects > dwt2
annotate org.eclipse.draw2d/src/org/eclipse/draw2d/text/BlockFlow.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2005 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 org.eclipse.draw2d.text.BlockFlow; |
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14 |
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15 import java.lang.all; |
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16 |
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17 import org.eclipse.swt.SWT; |
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18 import org.eclipse.draw2d.ColorConstants; |
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19 import org.eclipse.draw2d.Graphics; |
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20 import org.eclipse.draw2d.IFigure; |
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21 import org.eclipse.draw2d.PositionConstants; |
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22 import org.eclipse.draw2d.geometry.Insets; |
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23 import org.eclipse.draw2d.geometry.Rectangle; |
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24 import org.eclipse.draw2d.text.FlowFigure; |
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25 import org.eclipse.draw2d.text.BlockBox; |
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26 import org.eclipse.draw2d.text.BidiProcessor; |
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27 import org.eclipse.draw2d.text.FlowFigureLayout; |
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28 import org.eclipse.draw2d.text.BidiChars; |
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29 import org.eclipse.draw2d.text.BlockFlowLayout; |
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30 import org.eclipse.draw2d.text.FlowBorder; |
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31 |
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32 /** |
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33 * A <code>FlowFigure</code> represented by a single {@link BlockBox} containing one or |
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34 * more lines. A BlockFlow is a creator of LineBoxes, which its children require during |
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35 * layout. A BlockFlow can be thought of as a foundation for a paragraph. |
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36 * <P> |
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37 * BlockFlows must be parented by a <code>FlowFigure</code>. {@link FlowPage} can be |
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38 * used as a "root" block and can be parented by normal Figures. |
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39 * <P> |
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40 * Only {@link FlowFigure}s can be added to a BlockFlow. |
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41 * <P> |
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42 * WARNING: This class is not intended to be subclassed by clients. |
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43 * @author hudsonr |
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44 * @since 2.1 |
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45 */ |
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46 public class BlockFlow |
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47 : FlowFigure |
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48 { |
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49 |
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50 private const BlockBox blockBox; |
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51 private int alignment = PositionConstants.NONE; |
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52 private int orientation = SWT.NONE; |
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53 private bool bidiValid; |
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54 |
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55 /** |
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56 * Constructs a new BlockFlow. |
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57 */ |
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58 public this() { |
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59 blockBox = createBlockBox(); |
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60 } |
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61 |
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62 /** |
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63 * BlockFlows contribute a paragraph separator so as to keep the Bidi state of the text |
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64 * on either side of this block from affecting each other. Since each block is like a |
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65 * different paragraph, it does not contribute any actual text to its containing block. |
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66 * |
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67 * @see org.eclipse.draw2d.text.FlowFigure#contributeBidi(org.eclipse.draw2d.text.BidiProcessor) |
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68 */ |
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69 protected void contributeBidi(BidiProcessor proc) { |
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70 proc.addControlChar(BidiChars.P_SEP); |
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71 } |
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72 |
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73 BlockBox createBlockBox() { |
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74 return new BlockBox(this); |
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75 } |
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76 |
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77 /** |
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78 * @see org.eclipse.draw2d.text.FlowFigure#createDefaultFlowLayout() |
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79 */ |
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80 protected FlowFigureLayout createDefaultFlowLayout() { |
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81 return new BlockFlowLayout(this); |
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82 } |
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83 |
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84 /** |
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85 * Returns the BlockBox associated with this. |
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86 * @return This BlockFlow's BlockBox |
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87 */ |
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88 protected BlockBox getBlockBox() { |
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89 return blockBox; |
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90 } |
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91 package BlockBox getBlockBox_package() { |
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92 return getBlockBox(); |
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93 } |
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94 |
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95 int getBottomMargin() { |
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96 int margin = 0; |
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97 if (auto border = cast(FlowBorder)getBorder() ) { |
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98 return border.getBottomMargin(); |
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99 } |
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100 List children = getChildren(); |
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101 int childIndex = children.size() - 1; |
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102 if (childIndex >= 0 && null !is cast(BlockFlow)children.get(childIndex) ) { |
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103 margin = Math.max(margin, |
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104 (cast(BlockFlow)children.get(childIndex)).getBottomMargin()); |
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105 } |
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106 return margin; |
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107 } |
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108 |
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109 /** |
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110 * Returns the effective horizontal alignment. This method will never return {@link |
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111 * PositionConstants#NONE}. If the value is none, it will return the inherited alignment. |
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112 * If no alignment was inherited, it will return the default alignment ({@link |
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113 * PositionConstants#LEFT}). |
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114 * @return the effective alignment |
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115 */ |
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116 public int getHorizontalAligment() { |
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117 if (alignment !is PositionConstants.NONE) |
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118 return alignment; |
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119 IFigure parent = getParent(); |
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120 while (parent !is null && !( null !is cast(BlockFlow)parent )) |
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121 parent = parent.getParent(); |
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122 if (parent !is null) |
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123 return (cast(BlockFlow)parent).getHorizontalAligment(); |
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124 return PositionConstants.LEFT; |
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125 } |
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126 |
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127 int getLeftMargin() { |
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128 if ( auto b = cast(FlowBorder)getBorder() ) |
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129 return b.getLeftMargin(); |
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130 return 0; |
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131 } |
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132 |
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133 /** |
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134 * Returns the orientation set on this block. |
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135 * @return LTR, RTL or NONE |
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136 * @see #setOrientation(int) |
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137 * @since 3.1 |
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138 */ |
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139 public int getLocalOrientation() { |
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140 return orientation; |
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141 } |
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142 |
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143 /** |
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144 * Returns the horizontal alignment set on this block. |
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145 * @return LEFT, RIGHT, ALWAYS_LEFT, ALWAYS_RIGHT, NONE |
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146 * @see #setHorizontalAligment(int) |
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147 * @since 3.1 |
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148 */ |
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149 public int getLocalHorizontalAlignment() { |
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150 return alignment; |
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151 } |
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152 |
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153 /** |
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154 * Returns this block's Bidi orientation. If none was set on this block, it |
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155 * will inherit the one from its containing block. If there is no containing block, it |
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156 * will return the default orientation (SWT.RIGHT_TO_LEFT if mirrored; SWT.LEFT_TO_RIGHT |
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157 * otherwise). |
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158 * |
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159 * @return SWT.RIGHT_TO_LEFT or SWT.LEFT_TO_RIGHT |
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160 * @see #setOrientation(int) |
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161 * @since 3.1 |
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162 */ |
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163 public int getOrientation() { |
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164 if (orientation !is SWT.NONE) |
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165 return orientation; |
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166 IFigure parent = getParent(); |
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167 while (parent !is null && !(null !is cast(BlockFlow)parent )) |
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168 parent = parent.getParent(); |
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169 if (parent !is null) |
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170 return (cast(BlockFlow)parent).getOrientation(); |
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171 return isMirrored() ? SWT.RIGHT_TO_LEFT : SWT.LEFT_TO_RIGHT; |
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172 } |
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173 |
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174 int getRightMargin() { |
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175 if (auto b = cast(FlowBorder)getBorder() ) |
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176 return b.getRightMargin(); |
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177 return 0; |
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178 } |
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179 |
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180 int getTopMargin() { |
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181 int margin = 0; |
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182 if (auto border = cast(FlowBorder)getBorder() ) { |
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183 return border.getTopMargin(); |
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184 } |
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185 List children = getChildren(); |
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186 if (children.size() > 0 && null !is cast(BlockFlow)children.get(0) ) { |
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187 margin = Math.max(margin, |
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188 (cast(BlockFlow)children.get(0)).getTopMargin()); |
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189 } |
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190 return margin; |
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191 } |
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192 |
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193 /** |
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194 * @see org.eclipse.draw2d.Figure#paintBorder(org.eclipse.draw2d.Graphics) |
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195 */ |
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196 public void paintBorder(Graphics graphics) { |
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197 if ( auto b = cast(FlowBorder)getBorder() ) { |
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198 Rectangle where = getBlockBox().toRectangle(); |
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199 where.crop(new Insets(getTopMargin(), getLeftMargin(), |
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200 getBottomMargin(), getRightMargin())); |
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201 (cast(FlowBorder)getBorder()).paint(this, graphics, where, SWT.LEAD | SWT.TRAIL); |
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202 } else |
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203 super.paintBorder(graphics); |
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204 if (selectionStart !is -1) { |
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205 graphics.restoreState(); |
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206 graphics.setXORMode(true); |
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207 graphics.setBackgroundColor(ColorConstants.white); |
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208 graphics.fillRectangle(getBounds()); |
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209 } |
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210 } |
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211 |
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212 /** |
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213 * @see org.eclipse.draw2d.text.FlowFigure#postValidate() |
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214 */ |
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215 public void postValidate() { |
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216 Rectangle newBounds = getBlockBox().toRectangle(); |
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217 newBounds.crop(new Insets(getTopMargin(), getLeftMargin(), |
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218 getBottomMargin(), getRightMargin())); |
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219 setBounds(newBounds); |
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220 } |
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221 |
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222 /** |
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223 * @see FlowFigure#revalidate() |
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224 */ |
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225 public void revalidate() { |
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226 BlockFlowLayout layout = cast(BlockFlowLayout)getLayoutManager(); |
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227 layout.blockContentsChanged(); |
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228 super.revalidate(); |
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229 } |
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230 |
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231 /** |
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232 * A Block will invalidate the Bidi state of all its children, so that it is |
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233 * re-evaluated when this block is next validated. |
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234 * @see org.eclipse.draw2d.text.FlowFigure#revalidateBidi(org.eclipse.draw2d.IFigure) |
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235 */ |
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236 protected void revalidateBidi(IFigure origin) { |
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237 if (bidiValid) { |
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238 bidiValid = false; |
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239 revalidate(); |
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240 } |
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241 } |
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242 |
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243 /** |
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244 * Sets the horitontal aligment of the block. Valid values are: |
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245 * <UL> |
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246 * <LI>{@link PositionConstants#NONE NONE} - (default) Alignment is inherited from |
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247 * parent. If a parent is not found then LEFT is used.</LI> |
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248 * <LI>{@link PositionConstants#LEFT} - Alignment is with leading edge</LI> |
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249 * <LI>{@link PositionConstants#RIGHT} - Alignment is with trailing edge</LI> |
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250 * <LI>{@link PositionConstants#CENTER}</LI> |
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251 * <LI>{@link PositionConstants#ALWAYS_LEFT} - Left, irrespective of orientation</LI> |
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252 * <LI>{@link PositionConstants#ALWAYS_RIGHT} - Right, irrespective of orientation</LI> |
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253 * </UL> |
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254 * @param value the aligment |
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255 * @see #getHorizontalAligment() |
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256 */ |
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257 public void setHorizontalAligment(int value) { |
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258 value &= PositionConstants.LEFT | PositionConstants.CENTER | PositionConstants.RIGHT |
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259 | PositionConstants.ALWAYS_LEFT | PositionConstants.ALWAYS_RIGHT; |
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260 if (value is alignment) |
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261 return; |
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262 alignment = value; |
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263 revalidate(); |
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264 } |
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265 |
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266 /** |
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267 * Sets the orientation for this block. Orientation can be one of: |
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268 * <UL> |
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269 * <LI>{@link SWT#LEFT_TO_RIGHT} |
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270 * <LI>{@link SWT#RIGHT_TO_LEFT} |
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271 * <LI>{@link SWT#NONE} (default) |
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272 * </UL> |
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273 * <code>NONE</code> is used to indicate that orientation should be inherited from the |
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274 * encompassing block. |
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275 * |
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276 * @param orientation LTR, RTL or NONE |
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277 * @see #getOrientation() |
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278 * @since 3.1 |
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279 */ |
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280 public void setOrientation(int orientation) { |
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281 orientation &= SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT; |
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282 if (this.orientation is orientation) |
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283 return; |
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284 this.orientation = orientation; |
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285 revalidateBidi(this); |
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286 } |
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287 |
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288 /** |
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289 * @see org.eclipse.draw2d.Figure#useLocalCoordinates() |
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290 */ |
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291 protected bool useLocalCoordinates() { |
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292 return true; |
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293 } |
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294 |
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295 /** |
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296 * Re-evaluate the Bidi state of all the fragments if it has been |
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297 * invalidated. |
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298 * @see org.eclipse.draw2d.IFigure#validate() |
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299 */ |
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300 public void validate() { |
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301 if (!bidiValid) { |
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302 BidiProcessor.INSTANCE.setOrientation(getOrientation()); |
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303 if (getOrientation() is SWT.LEFT_TO_RIGHT && isMirrored()) |
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304 BidiProcessor.INSTANCE.addControlChar(BidiChars.LRE); |
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305 super.contributeBidi(BidiProcessor.INSTANCE); |
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306 BidiProcessor.INSTANCE.process(); |
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307 bidiValid = true; |
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308 } |
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309 super.validate(); |
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310 } |
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311 |
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312 } |