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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.text.source.projection.ProjectionRulerColumn;
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14
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15 import dwt.dwthelper.utils;
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16
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17
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18 import java.util.Iterator;
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19
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20 import dwt.DWT;
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21 import dwt.events.MouseEvent;
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22 import dwt.events.MouseMoveListener;
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23 import dwt.events.MouseTrackAdapter;
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24 import dwt.graphics.Color;
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25 import dwt.widgets.Composite;
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26 import dwt.widgets.Control;
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27 import dwt.widgets.Display;
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28 import dwtx.jface.text.BadLocationException;
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29 import dwtx.jface.text.IDocument;
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30 import dwtx.jface.text.Position;
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31 import dwtx.jface.text.source.AnnotationRulerColumn;
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32 import dwtx.jface.text.source.CompositeRuler;
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33 import dwtx.jface.text.source.IAnnotationAccess;
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34 import dwtx.jface.text.source.IAnnotationModel;
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35 import dwtx.jface.text.source.IAnnotationModelExtension;
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36
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37
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38 /**
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39 * A ruler column for controlling the behavior of a
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40 * {@link dwtx.jface.text.source.projection.ProjectionViewer}.
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41 *
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42 * @since 3.0
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43 */
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44 class ProjectionRulerColumn : AnnotationRulerColumn {
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45
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46 private ProjectionAnnotation fCurrentAnnotation;
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47
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48 /**
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49 * Creates a new projection ruler column.
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50 *
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51 * @param model the column's annotation model
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52 * @param width the width in pixels
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53 * @param annotationAccess the annotation access
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54 */
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55 public ProjectionRulerColumn(IAnnotationModel model, int width, IAnnotationAccess annotationAccess) {
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56 super(model, width, annotationAccess);
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57 }
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58
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59 /**
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60 * Creates a new projection ruler column.
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61 *
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62 * @param width the width in pixels
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63 * @param annotationAccess the annotation access
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64 */
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65 public ProjectionRulerColumn(int width, IAnnotationAccess annotationAccess) {
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66 super(width, annotationAccess);
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67 }
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68
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69 /*
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70 * @see dwtx.jface.text.source.AnnotationRulerColumn#mouseClicked(int)
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71 */
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72 protected void mouseClicked(int line) {
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73 clearCurrentAnnotation();
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74 ProjectionAnnotation annotation= findAnnotation(line, true);
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75 if (annotation !is null) {
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76 ProjectionAnnotationModel model= (ProjectionAnnotationModel) getModel();
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77 model.toggleExpansionState(annotation);
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78 }
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79 }
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80
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81 /**
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82 * Returns the projection annotation of the column's annotation
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83 * model that contains the given line.
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84 *
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85 * @param line the line
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86 * @param exact <code>true</code> if the annotation range must match exactly
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87 * @return the projection annotation containing the given line
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88 */
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89 private ProjectionAnnotation findAnnotation(int line, bool exact) {
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90
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91 ProjectionAnnotation previousAnnotation= null;
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92
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93 IAnnotationModel model= getModel();
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94 if (model !is null) {
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95 IDocument document= getCachedTextViewer().getDocument();
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96
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97 int previousDistance= Integer.MAX_VALUE;
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98
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99 Iterator e= model.getAnnotationIterator();
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100 while (e.hasNext()) {
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101 Object next= e.next();
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102 if (next instanceof ProjectionAnnotation) {
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103 ProjectionAnnotation annotation= (ProjectionAnnotation) next;
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104 Position p= model.getPosition(annotation);
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105 if (p is null)
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106 continue;
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107
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108 int distance= getDistance(annotation, p, document, line);
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109 if (distance is -1)
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110 continue;
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111
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112 if (!exact) {
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113 if (distance < previousDistance) {
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114 previousAnnotation= annotation;
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115 previousDistance= distance;
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116 }
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117 } else if (distance is 0) {
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118 previousAnnotation= annotation;
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119 }
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120 }
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121 }
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122 }
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123
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124 return previousAnnotation;
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125 }
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126
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127 /**
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128 * Returns the distance of the given line to the start line of the given position in the given document. The distance is
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129 * <code>-1</code> when the line is not included in the given position.
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130 *
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131 * @param annotation the annotation
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132 * @param position the position
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133 * @param document the document
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134 * @param line the line
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135 * @return <code>-1</code> if line is not contained, a position number otherwise
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136 */
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137 private int getDistance(ProjectionAnnotation annotation, Position position, IDocument document, int line) {
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138 if (position.getOffset() > -1 && position.getLength() > -1) {
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139 try {
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140 int startLine= document.getLineOfOffset(position.getOffset());
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141 int endLine= document.getLineOfOffset(position.getOffset() + position.getLength());
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142 if (startLine <= line && line < endLine) {
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143 if (annotation.isCollapsed()) {
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144 int captionOffset;
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145 if (position instanceof IProjectionPosition)
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146 captionOffset= ((IProjectionPosition) position).computeCaptionOffset(document);
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147 else
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148 captionOffset= 0;
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149
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150 int captionLine= document.getLineOfOffset(position.getOffset() + captionOffset);
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151 if (startLine <= captionLine && captionLine < endLine)
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152 return Math.abs(line - captionLine);
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153 }
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154 return line - startLine;
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155 }
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156 } catch (BadLocationException x) {
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157 }
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158 }
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159 return -1;
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160 }
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161
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162 private bool clearCurrentAnnotation() {
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163 if (fCurrentAnnotation !is null) {
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164 fCurrentAnnotation.setRangeIndication(false);
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165 fCurrentAnnotation= null;
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166 return true;
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167 }
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168 return false;
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169 }
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170
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171 /*
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172 * @see dwtx.jface.text.source.IVerticalRulerColumn#createControl(dwtx.jface.text.source.CompositeRuler, dwt.widgets.Composite)
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173 */
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174 public Control createControl(CompositeRuler parentRuler, Composite parentControl) {
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175 Control control= super.createControl(parentRuler, parentControl);
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176
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177 // set background
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178 Display display= parentControl.getDisplay();
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179 Color background= display.getSystemColor(DWT.COLOR_LIST_BACKGROUND);
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180 control.setBackground(background);
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181
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182 // install hover listener
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183 control.addMouseTrackListener(new MouseTrackAdapter() {
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184 public void mouseExit(MouseEvent e) {
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185 if (clearCurrentAnnotation())
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186 redraw();
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187 }
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188 });
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189
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190 // install mouse move listener
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191 control.addMouseMoveListener(new MouseMoveListener() {
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192 public void mouseMove(MouseEvent e) {
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193 bool redraw= false;
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194 ProjectionAnnotation annotation= findAnnotation(toDocumentLineNumber(e.y), false);
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195 if (annotation !is fCurrentAnnotation) {
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196 if (fCurrentAnnotation !is null) {
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197 fCurrentAnnotation.setRangeIndication(false);
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198 redraw= true;
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199 }
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200 fCurrentAnnotation= annotation;
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201 if (fCurrentAnnotation !is null && !fCurrentAnnotation.isCollapsed()) {
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202 fCurrentAnnotation.setRangeIndication(true);
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203 redraw= true;
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204 }
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205 }
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206 if (redraw)
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207 redraw();
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208 }
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209 });
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210 return control;
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211 }
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212
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213 /*
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214 * @see dwtx.jface.text.source.AnnotationRulerColumn#setModel(dwtx.jface.text.source.IAnnotationModel)
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215 */
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216 public void setModel(IAnnotationModel model) {
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217 if (model instanceof IAnnotationModelExtension) {
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218 IAnnotationModelExtension extension= (IAnnotationModelExtension) model;
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219 model= extension.getAnnotationModel(ProjectionSupport.PROJECTION);
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220 }
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221 super.setModel(model);
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222 }
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223
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224 /*
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225 * @see dwtx.jface.text.source.AnnotationRulerColumn#isPropagatingMouseListener()
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226 */
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227 protected bool isPropagatingMouseListener() {
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228 return false;
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229 }
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230
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231 /*
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232 * @see dwtx.jface.text.source.AnnotationRulerColumn#hasAnnotation(int)
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233 */
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234 protected bool hasAnnotation(int lineNumber) {
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235 return findAnnotation(lineNumber, true) !is null;
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236 }
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237 }
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