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annotate org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineChangeHover.d @ 16:dbfb303e8fb0

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first complete successful compile (win-only)
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 08:56:47 +0100
parents bc29606a740c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
12
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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 org.eclipse.jface.text.source.LineChangeHover;
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14
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15 import org.eclipse.jface.text.source.ISharedTextColors; // packageimport
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16 import org.eclipse.jface.text.source.ILineRange; // packageimport
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17 import org.eclipse.jface.text.source.IAnnotationPresentation; // packageimport
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18 import org.eclipse.jface.text.source.IVerticalRulerInfoExtension; // packageimport
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19 import org.eclipse.jface.text.source.ICharacterPairMatcher; // packageimport
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20 import org.eclipse.jface.text.source.TextInvocationContext; // packageimport
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21 import org.eclipse.jface.text.source.IChangeRulerColumn; // packageimport
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22 import org.eclipse.jface.text.source.IAnnotationMap; // packageimport
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23 import org.eclipse.jface.text.source.IAnnotationModelListenerExtension; // packageimport
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24 import org.eclipse.jface.text.source.ISourceViewerExtension2; // packageimport
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25 import org.eclipse.jface.text.source.IAnnotationHover; // packageimport
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26 import org.eclipse.jface.text.source.ContentAssistantFacade; // packageimport
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27 import org.eclipse.jface.text.source.IAnnotationAccess; // packageimport
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28 import org.eclipse.jface.text.source.IVerticalRulerExtension; // packageimport
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29 import org.eclipse.jface.text.source.IVerticalRulerColumn; // packageimport
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30 import org.eclipse.jface.text.source.LineNumberRulerColumn; // packageimport
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31 import org.eclipse.jface.text.source.MatchingCharacterPainter; // packageimport
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32 import org.eclipse.jface.text.source.IAnnotationModelExtension; // packageimport
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33 import org.eclipse.jface.text.source.ILineDifferExtension; // packageimport
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34 import org.eclipse.jface.text.source.DefaultCharacterPairMatcher; // packageimport
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35 import org.eclipse.jface.text.source.LineNumberChangeRulerColumn; // packageimport
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36 import org.eclipse.jface.text.source.IAnnotationAccessExtension; // packageimport
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37 import org.eclipse.jface.text.source.ISourceViewer; // packageimport
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38 import org.eclipse.jface.text.source.AnnotationModel; // packageimport
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39 import org.eclipse.jface.text.source.ILineDifferExtension2; // packageimport
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40 import org.eclipse.jface.text.source.IAnnotationModelListener; // packageimport
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41 import org.eclipse.jface.text.source.IVerticalRuler; // packageimport
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42 import org.eclipse.jface.text.source.DefaultAnnotationHover; // packageimport
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43 import org.eclipse.jface.text.source.SourceViewer; // packageimport
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44 import org.eclipse.jface.text.source.SourceViewerConfiguration; // packageimport
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45 import org.eclipse.jface.text.source.AnnotationBarHoverManager; // packageimport
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46 import org.eclipse.jface.text.source.CompositeRuler; // packageimport
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47 import org.eclipse.jface.text.source.ImageUtilities; // packageimport
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48 import org.eclipse.jface.text.source.VisualAnnotationModel; // packageimport
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49 import org.eclipse.jface.text.source.IAnnotationModel; // packageimport
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50 import org.eclipse.jface.text.source.ISourceViewerExtension3; // packageimport
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51 import org.eclipse.jface.text.source.ILineDiffInfo; // packageimport
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52 import org.eclipse.jface.text.source.VerticalRulerEvent; // packageimport
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53 import org.eclipse.jface.text.source.ChangeRulerColumn; // packageimport
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54 import org.eclipse.jface.text.source.ILineDiffer; // packageimport
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55 import org.eclipse.jface.text.source.AnnotationModelEvent; // packageimport
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56 import org.eclipse.jface.text.source.AnnotationColumn; // packageimport
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57 import org.eclipse.jface.text.source.AnnotationRulerColumn; // packageimport
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58 import org.eclipse.jface.text.source.IAnnotationHoverExtension; // packageimport
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59 import org.eclipse.jface.text.source.AbstractRulerColumn; // packageimport
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60 import org.eclipse.jface.text.source.ISourceViewerExtension; // packageimport
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61 import org.eclipse.jface.text.source.AnnotationMap; // packageimport
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62 import org.eclipse.jface.text.source.IVerticalRulerInfo; // packageimport
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63 import org.eclipse.jface.text.source.IAnnotationModelExtension2; // packageimport
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64 import org.eclipse.jface.text.source.LineRange; // packageimport
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65 import org.eclipse.jface.text.source.IAnnotationAccessExtension2; // packageimport
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66 import org.eclipse.jface.text.source.VerticalRuler; // packageimport
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67 import org.eclipse.jface.text.source.JFaceTextMessages; // packageimport
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68 import org.eclipse.jface.text.source.IOverviewRuler; // packageimport
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69 import org.eclipse.jface.text.source.Annotation; // packageimport
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70 import org.eclipse.jface.text.source.IVerticalRulerListener; // packageimport
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71 import org.eclipse.jface.text.source.ISourceViewerExtension4; // packageimport
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72 import org.eclipse.jface.text.source.AnnotationPainter; // packageimport
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73 import org.eclipse.jface.text.source.IAnnotationHoverExtension2; // packageimport
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74 import org.eclipse.jface.text.source.OverviewRuler; // packageimport
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75 import org.eclipse.jface.text.source.OverviewRulerHoverManager; // packageimport
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76
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77
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78 import java.lang.all;
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79 import java.util.List;
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80 import java.util.LinkedList;
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81 import java.util.Iterator;
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82
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83
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84
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85
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86 import org.eclipse.swt.graphics.Point;
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87 import org.eclipse.swt.widgets.Shell;
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88 import org.eclipse.jface.action.ToolBarManager;
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89 import org.eclipse.jface.text.DefaultInformationControl;
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90 import org.eclipse.jface.text.IDocument;
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91 import org.eclipse.jface.text.IInformationControl;
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92 import org.eclipse.jface.text.IInformationControlCreator;
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93 import org.eclipse.jface.text.information.IInformationProviderExtension2;
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94
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95
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96 /**
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97 * A hover for line oriented diffs. It determines the text to show as hover for a certain line in the
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98 * document.
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99 *
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100 * @since 3.0
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101 */
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102 public class LineChangeHover : IAnnotationHover, IAnnotationHoverExtension, IInformationProviderExtension2 {
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103
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104 /*
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105 * @see org.eclipse.jface.text.source.IAnnotationHover#getHoverInfo(org.eclipse.jface.text.source.ISourceViewer, int)
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106 */
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107 public String getHoverInfo(ISourceViewer sourceViewer, int lineNumber) {
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108 return null;
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109 }
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110
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111 /**
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112 * Formats the source w/ syntax coloring etc. This implementation replaces tabs with spaces.
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113 * May be overridden by subclasses.
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114 *
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115 * @param content the hover content
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116 * @return <code>content</code> reformatted
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117 */
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118 protected String formatSource(String content) {
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119 if (content !is null) {
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120 StringBuffer sb= new StringBuffer(content);
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121 final String tabReplacement= getTabReplacement();
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122 for (int pos= 0; pos < sb.length(); pos++) {
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123 if (sb.charAt(pos) is '\t')
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124 sb.replace(pos, pos + 1, tabReplacement);
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125 }
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126 return sb.toString();
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127 }
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128 return content;
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129 }
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130
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131 /**
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132 * Returns a replacement for the tab character. The default implementation
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133 * returns a tabulator character, but subclasses may override to specify a
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134 * number of spaces.
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135 *
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136 * @return a whitespace String that will be substituted for the tabulator
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137 * character
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138 */
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139 protected String getTabReplacement() {
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140 return "\t"; //$NON-NLS-1$
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141 }
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142
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143 /**
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144 * Computes the content of the hover for the document contained in <code>viewer</code> on
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145 * line <code>line</code>.
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146 *
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147 * @param viewer the connected viewer
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148 * @param first the first line in <code>viewer</code>'s document to consider
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149 * @param last the last line in <code>viewer</code>'s document to consider
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150 * @param maxLines the max number of lines
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151 * @return The hover content corresponding to the parameters
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152 * @see #getHoverInfo(ISourceViewer, int)
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153 * @see #getHoverInfo(ISourceViewer, ILineRange, int)
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154 */
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155 private String computeContent(ISourceViewer viewer, int first, int last, int maxLines) {
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156 ILineDiffer differ= getDiffer(viewer);
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157 if (differ is null)
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158 return null;
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159
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160 final List lines= new LinkedList();
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161 for (int l= first; l <= last; l++) {
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162 ILineDiffInfo info= differ.getLineInfo(l);
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163 if (info !is null)
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164 lines.add(cast(Object)info);
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165 }
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166
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167 return decorateText(lines, maxLines);
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168 }
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169
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170 /**
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171 * Takes a list of <code>ILineDiffInfo</code>s and computes a hover of at most <code>maxLines</code>.
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172 * Added lines are prefixed with a <code>'+'</code>, changed lines with <code>'>'</code> and
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173 * deleted lines with <code>'-'</code>.
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174 * <p>Deleted and added lines can even each other out, so that a number of deleted lines get
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175 * displayed where - in the current document - the added lines are.
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176 *
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177 * @param diffInfos a <code>List</code> of <code>ILineDiffInfo</code>
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178 * @param maxLines the maximum number of lines. Note that adding up all annotations might give
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179 * more than that due to deleted lines.
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180 * @return a <code>String</code> suitable for hover display
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181 */
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182 protected String decorateText(List diffInfos, int maxLines) {
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183 /* maxLines controls the size of the hover (not more than what fits into the display are of
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184 * the viewer).
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185 * added controls how many lines are added - added lines are
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186 */
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187 String text= ""; //$NON-NLS-1$
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188 int added= 0;
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189 for (Iterator it= diffInfos.iterator(); it.hasNext();) {
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190 ILineDiffInfo info= cast(ILineDiffInfo)it.next();
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191 String[] original= info.getOriginalText();
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192 int type= info.getChangeType();
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193 int i= 0;
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194 if (type is ILineDiffInfo.ADDED)
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195 added++;
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196 else if (type is ILineDiffInfo.CHANGED) {
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197 text ~= "> " ~ (original.length > 0 ? original[i++] : ""); //$NON-NLS-1$ //$NON-NLS-2$
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198 maxLines--;
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199 } else if (type is ILineDiffInfo.UNCHANGED) {
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200 maxLines++;
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201 }
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202 if (maxLines is 0)
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203 return trimTrailing(text);
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204 for (; i < original.length; i++) {
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205 text ~= "- " ~ original[i]; //$NON-NLS-1$
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206 added--;
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207 if (--maxLines is 0)
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208 return trimTrailing(text);
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209 }
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210 }
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211 text= text.trim();
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212 if (text.length() is 0 && added-- > 0 && maxLines-- > 0)
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213 text ~= "+ "; //$NON-NLS-1$
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214 while (added-- > 0 && maxLines-- > 0)
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215 text ~= "\n+ "; //$NON-NLS-1$
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216 return text;
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217 }
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218
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219 /**
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220 * Trims trailing spaces
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221 *
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222 * @param text a <code>String</code>
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223 * @return a copy of <code>text</code> with trailing spaces removed
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224 */
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225 private String trimTrailing(String text) {
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226 int pos= text.length() - 1;
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227 while (pos >= 0 && Character.isWhitespace(text.charAt(pos))) {
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228 pos--;
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229 }
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230 return text.substring(0, pos + 1);
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231 }
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232
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233 /**
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234 * Extracts the line differ - if any - from the viewer's document's annotation model.
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235 * @param viewer the viewer
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236 * @return a line differ for the document displayed in viewer, or <code>null</code>.
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237 */
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238 private ILineDiffer getDiffer(ISourceViewer viewer) {
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239 IAnnotationModel model= viewer.getAnnotationModel();
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240
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241 if (model is null)
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242 return null;
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243
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244 if ( cast(IAnnotationModelExtension)model ) {
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245 IAnnotationModel diffModel= (cast(IAnnotationModelExtension)model).getAnnotationModel(stringcast(IChangeRulerColumn.QUICK_DIFF_MODEL_ID));
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246 if (diffModel !is null)
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247 model= diffModel;
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248 }
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249 if ( cast(ILineDiffer)model ) {
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250 if (cast(ILineDifferExtension2)model && (cast(ILineDifferExtension2)model).isSuspended())
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251 return null;
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252 return cast(ILineDiffer)model;
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253 }
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254 return null;
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255 }
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256
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257 /**
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258 * Computes the block of lines which form a contiguous block of changes covering <code>line</code>.
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259 *
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260 * @param viewer the source viewer showing
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261 * @param line the line which a hover is displayed for
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262 * @param min the first line in <code>viewer</code>'s document to consider
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263 * @param max the last line in <code>viewer</code>'s document to consider
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264 * @return the selection in the document displayed in <code>viewer</code> containing <code>line</code>
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265 * that is covered by the hover information returned by the receiver.
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266 */
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267 protected Point computeLineRange(ISourceViewer viewer, int line, int min, int max) {
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268 /* Algorithm:
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269 * All lines that have changes to themselves (added, changed) are taken that form a
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270 * contiguous block of lines that includes <code>line</code>.
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271 *
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272 * If <code>line</code> is itself unchanged, if there is a deleted line either above or
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273 * below, or both, the lines +/- 1 from <code>line</code> are included in the search as well,
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274 * without applying this last rule to them, though. (I.e., if <code>line</code> is unchanged,
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275 * but has a deleted line above, this one is taken in. If the line above has changes, the block
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276 * is extended from there. If the line has no changes itself, the search stops).
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277 *
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278 * The block never extends the visible line range of the viewer.
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279 */
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280
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281 ILineDiffer differ= getDiffer(viewer);
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282 if (differ is null)
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283 return new Point(-1, -1);
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284
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285 // backward search
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286
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287 int l= line;
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288 ILineDiffInfo info= differ.getLineInfo(l);
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289 // search backwards until a line has no changes to itself
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290 while (l >= min && info !is null && (info.getChangeType() is ILineDiffInfo.CHANGED || info.getChangeType() is ILineDiffInfo.ADDED)) {
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291 info= differ.getLineInfo(--l);
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292 }
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293
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294 int first= Math.min(l + 1, line);
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295
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296 // forward search
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297
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298 l= line;
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299 info= differ.getLineInfo(l);
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300 // search forward until a line has no changes to itself
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301 while (l <= max && info !is null && (info.getChangeType() is ILineDiffInfo.CHANGED || info.getChangeType() is ILineDiffInfo.ADDED)) {
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302 info= differ.getLineInfo(++l);
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303 }
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304
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305 int last= Math.max(l - 1, line);
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306
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307 return new Point(first, last);
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308 }
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309
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310 /*
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311 * @see org.eclipse.jface.text.source.IAnnotationHoverExtension#getHoverInfo(org.eclipse.jface.text.source.ISourceViewer, org.eclipse.jface.text.source.ILineRange, int)
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312 */
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313 public Object getHoverInfo(ISourceViewer sourceViewer, ILineRange lineRange, int visibleLines) {
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314 int first= adaptFirstLine(sourceViewer, lineRange.getStartLine());
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315 int last= adaptLastLine(sourceViewer, lineRange.getStartLine() + lineRange.getNumberOfLines() - 1);
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316 String content= computeContent(sourceViewer, first, last, visibleLines);
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317 return stringcast(formatSource(content));
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318 }
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319
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320 /**
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321 * Adapts the start line to the implementation of <code>ILineDiffInfo</code>.
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322 *
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323 * @param viewer the source viewer
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324 * @param startLine the line to adapt
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325 * @return <code>startLine - 1</code> if that line exists and is an
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326 * unchanged line followed by deletions, <code>startLine</code>
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327 * otherwise
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328 */
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329 private int adaptFirstLine(ISourceViewer viewer, int startLine) {
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330 ILineDiffer differ= getDiffer(viewer);
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331 if (differ !is null && startLine > 0) {
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332 int l= startLine - 1;
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333 ILineDiffInfo info= differ.getLineInfo(l);
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334 if (info !is null && info.getChangeType() is ILineDiffInfo.UNCHANGED && info.getRemovedLinesBelow() > 0)
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335 return l;
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336 }
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337 return startLine;
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338 }
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339
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340 /**
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341 * Adapts the last line to the implementation of <code>ILineDiffInfo</code>.
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342 *
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343 * @param viewer the source viewer
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344 * @param lastLine the line to adapt
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345 * @return <code>lastLine - 1</code> if that line exists and is an
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346 * unchanged line followed by deletions, <code>startLine</code>
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347 * otherwise
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348 */
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349 private int adaptLastLine(ISourceViewer viewer, int lastLine) {
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350 ILineDiffer differ= getDiffer(viewer);
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351 if (differ !is null && lastLine > 0) {
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352 ILineDiffInfo info= differ.getLineInfo(lastLine);
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353 if (info !is null && info.getChangeType() is ILineDiffInfo.UNCHANGED)
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354 return lastLine - 1;
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355 }
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356 return lastLine;
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357 }
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358
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359 /*
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360 * @see org.eclipse.jface.text.source.IAnnotationHoverExtension#getHoverLineRange(org.eclipse.jface.text.source.ISourceViewer, int)
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361 */
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362 public ILineRange getHoverLineRange(ISourceViewer viewer, int lineNumber) {
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363 IDocument document= viewer.getDocument();
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364 if (document !is null) {
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365 Point range= computeLineRange(viewer, lineNumber, 0, Math.max(0, document.getNumberOfLines() - 1));
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366 if (range.x !is -1 && range.y !is -1)
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367 return new LineRange(range.x, range.y - range.x + 1);
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368 }
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369 return null;
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370 }
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371
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372 /*
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373 * @see org.eclipse.jface.text.source.IAnnotationHoverExtension#canHandleMouseCursor()
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374 */
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375 public bool canHandleMouseCursor() {
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376 return false;
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377 }
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378
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379 /*
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380 * @see org.eclipse.jface.text.source.IAnnotationHoverExtension#getHoverControlCreator()
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381 */
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382 public IInformationControlCreator getHoverControlCreator() {
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383 return null;
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384 }
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diff changeset
385
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diff changeset
386 /*
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diff changeset
387 * @see org.eclipse.jface.text.information.IInformationProviderExtension2#getInformationPresenterControlCreator()
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diff changeset
388 * @since 3.2
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389 */
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diff changeset
390 public IInformationControlCreator getInformationPresenterControlCreator() {
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parents:
diff changeset
391 return new class() IInformationControlCreator {
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diff changeset
392 public IInformationControl createInformationControl(Shell parent) {
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393 return new DefaultInformationControl(parent, cast(ToolBarManager)null, null);
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394 }
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diff changeset
395 };
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396 }
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397 }