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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.jface.text.source.VerticalRuler;
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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.custom.StyledText;
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22 import dwt.events.DisposeEvent;
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23 import dwt.events.DisposeListener;
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24 import dwt.events.MouseEvent;
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25 import dwt.events.MouseListener;
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26 import dwt.events.PaintEvent;
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27 import dwt.events.PaintListener;
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28 import dwt.graphics.Font;
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29 import dwt.graphics.GC;
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30 import dwt.graphics.Image;
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31 import dwt.graphics.Point;
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32 import dwt.graphics.Rectangle;
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33 import dwt.widgets.Canvas;
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34 import dwt.widgets.Composite;
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35 import dwt.widgets.Control;
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36 import dwt.widgets.Display;
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37 import dwtx.jface.text.BadLocationException;
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38 import dwtx.jface.text.IDocument;
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39 import dwtx.jface.text.IRegion;
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40 import dwtx.jface.text.ITextListener;
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41 import dwtx.jface.text.ITextViewer;
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42 import dwtx.jface.text.ITextViewerExtension5;
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43 import dwtx.jface.text.IViewportListener;
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44 import dwtx.jface.text.JFaceTextUtil;
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45 import dwtx.jface.text.Position;
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46 import dwtx.jface.text.Region;
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47 import dwtx.jface.text.TextEvent;
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48
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49
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50 /**
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51 * A vertical ruler which is connected to a text viewer. Single column standard
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52 * implementation of {@link dwtx.jface.text.source.IVerticalRuler}.
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53 * <p>
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54 * The same can be achieved by using <code>CompositeRuler</code> configured
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55 * with an <code>AnnotationRulerColumn</code>. Clients may use this class as
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56 * is.
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57 *
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58 * @see dwtx.jface.text.ITextViewer
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59 */
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60 public final class VerticalRuler : IVerticalRuler, IVerticalRulerExtension {
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61
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62 /**
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63 * Internal listener class.
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64 */
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65 class InternalListener : IViewportListener, IAnnotationModelListener, ITextListener {
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66
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67 /*
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68 * @see IViewportListener#viewportChanged(int)
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69 */
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70 public void viewportChanged(int verticalPosition) {
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71 if (verticalPosition !is fScrollPos)
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72 redraw();
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73 }
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74
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75 /*
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76 * @see IAnnotationModelListener#modelChanged(IAnnotationModel)
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77 */
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78 public void modelChanged(IAnnotationModel model) {
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79 update();
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80 }
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81
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82 /*
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83 * @see ITextListener#textChanged(TextEvent)
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84 */
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85 public void textChanged(TextEvent e) {
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86 if (fTextViewer !is null && e.getViewerRedrawState())
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87 redraw();
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88 }
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89 }
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90
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91 /** The vertical ruler's text viewer */
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92 private ITextViewer fTextViewer;
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93 /** The ruler's canvas */
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94 private Canvas fCanvas;
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95 /** The vertical ruler's model */
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96 private IAnnotationModel fModel;
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97 /** Cache for the actual scroll position in pixels */
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98 private int fScrollPos;
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99 /** The buffer for double buffering */
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100 private Image fBuffer;
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101 /** The line of the last mouse button activity */
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102 private int fLastMouseButtonActivityLine= -1;
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103 /** The internal listener */
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104 private InternalListener fInternalListener= new InternalListener();
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105 /** The width of this vertical ruler */
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106 private int fWidth;
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107 /**
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108 * The annotation access of this vertical ruler
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109 * @since 3.0
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110 */
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111 private IAnnotationAccess fAnnotationAccess;
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112
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113 /**
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114 * Constructs a vertical ruler with the given width.
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115 *
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116 * @param width the width of the vertical ruler
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117 */
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118 public VerticalRuler(int width) {
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119 this(width, null);
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120 }
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121
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122 /**
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123 * Constructs a vertical ruler with the given width and the given annotation
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124 * access.
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125 *
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126 * @param width the width of the vertical ruler
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127 * @param annotationAcccess the annotation access
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128 * @since 3.0
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129 */
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130 public VerticalRuler(int width, IAnnotationAccess annotationAcccess) {
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131 fWidth= width;
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132 fAnnotationAccess= annotationAcccess;
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133 }
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134
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135 /*
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136 * @see IVerticalRuler#getControl()
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137 */
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138 public Control getControl() {
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139 return fCanvas;
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140 }
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141
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142 /*
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143 * @see IVerticalRuler#createControl(Composite, ITextViewer)
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144 */
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145 public Control createControl(Composite parent, ITextViewer textViewer) {
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146
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147 fTextViewer= textViewer;
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148
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149 fCanvas= new Canvas(parent, DWT.NO_BACKGROUND);
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150
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151 fCanvas.addPaintListener(new PaintListener() {
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152 public void paintControl(PaintEvent event) {
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153 if (fTextViewer !is null)
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154 doubleBufferPaint(event.gc);
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155 }
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156 });
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157
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158 fCanvas.addDisposeListener(new DisposeListener() {
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159 public void widgetDisposed(DisposeEvent e) {
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160 handleDispose();
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161 fTextViewer= null;
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162 }
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163 });
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164
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165 fCanvas.addMouseListener(new MouseListener() {
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166 public void mouseUp(MouseEvent event) {
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167 }
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168
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169 public void mouseDown(MouseEvent event) {
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170 fLastMouseButtonActivityLine= toDocumentLineNumber(event.y);
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171 }
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172
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173 public void mouseDoubleClick(MouseEvent event) {
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174 fLastMouseButtonActivityLine= toDocumentLineNumber(event.y);
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175 }
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176 });
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177
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178 if (fTextViewer !is null) {
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179 fTextViewer.addViewportListener(fInternalListener);
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180 fTextViewer.addTextListener(fInternalListener);
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181 }
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182
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183 return fCanvas;
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184 }
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185
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186 /**
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187 * Disposes the ruler's resources.
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188 */
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189 private void handleDispose() {
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190
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191 if (fTextViewer !is null) {
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192 fTextViewer.removeViewportListener(fInternalListener);
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193 fTextViewer.removeTextListener(fInternalListener);
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194 fTextViewer= null;
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195 }
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196
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197 if (fModel !is null)
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198 fModel.removeAnnotationModelListener(fInternalListener);
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199
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200 if (fBuffer !is null) {
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201 fBuffer.dispose();
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202 fBuffer= null;
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203 }
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204 }
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205
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206
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207 /**
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208 * Double buffer drawing.
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209 *
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210 * @param dest the GC to draw into
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211 */
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212 private void doubleBufferPaint(GC dest) {
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213
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214 Point size= fCanvas.getSize();
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215
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216 if (size.x <= 0 || size.y <= 0)
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217 return;
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218
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219 if (fBuffer !is null) {
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220 Rectangle r= fBuffer.getBounds();
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221 if (r.width !is size.x || r.height !is size.y) {
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222 fBuffer.dispose();
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223 fBuffer= null;
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224 }
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225 }
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226 if (fBuffer is null)
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227 fBuffer= new Image(fCanvas.getDisplay(), size.x, size.y);
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228
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229 GC gc= new GC(fBuffer);
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230 gc.setFont(fTextViewer.getTextWidget().getFont());
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231 try {
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232 gc.setBackground(fCanvas.getBackground());
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233 gc.fillRectangle(0, 0, size.x, size.y);
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234
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235 if (fTextViewer instanceof ITextViewerExtension5)
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236 doPaint1(gc);
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237 else
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238 doPaint(gc);
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239
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240 } finally {
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241 gc.dispose();
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242 }
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243
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244 dest.drawImage(fBuffer, 0, 0);
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245 }
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246
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247 /**
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248 * Returns the document offset of the upper left corner of the
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249 * widgets view port, possibly including partially visible lines.
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250 *
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251 * @return the document offset of the upper left corner including partially visible lines
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252 * @since 2.0
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253 */
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254 private int getInclusiveTopIndexStartOffset() {
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255
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256 StyledText textWidget= fTextViewer.getTextWidget();
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257 if (textWidget !is null && !textWidget.isDisposed()) {
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258 int top= JFaceTextUtil.getPartialTopIndex(fTextViewer);
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259 try {
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260 IDocument document= fTextViewer.getDocument();
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261 return document.getLineOffset(top);
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262 } catch (BadLocationException x) {
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263 }
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264 }
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265
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266 return -1;
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267 }
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268
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269
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270
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271 /**
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272 * Draws the vertical ruler w/o drawing the Canvas background.
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273 *
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274 * @param gc the GC to draw into
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275 */
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276 protected void doPaint(GC gc) {
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277
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278 if (fModel is null || fTextViewer is null)
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279 return;
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280
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281 IAnnotationAccessExtension annotationAccessExtension= null;
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282 if (fAnnotationAccess instanceof IAnnotationAccessExtension)
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283 annotationAccessExtension= (IAnnotationAccessExtension) fAnnotationAccess;
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284
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285 StyledText styledText= fTextViewer.getTextWidget();
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286 IDocument doc= fTextViewer.getDocument();
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287
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288 int topLeft= getInclusiveTopIndexStartOffset();
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289 int bottomRight= fTextViewer.getBottomIndexEndOffset();
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290 int viewPort= bottomRight - topLeft;
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291
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292 Point d= fCanvas.getSize();
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293 fScrollPos= styledText.getTopPixel();
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294
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295 int topLine= -1, bottomLine= -1;
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296 try {
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297 IRegion region= fTextViewer.getVisibleRegion();
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298 topLine= doc.getLineOfOffset(region.getOffset());
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299 bottomLine= doc.getLineOfOffset(region.getOffset() + region.getLength());
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300 } catch (BadLocationException x) {
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301 return;
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302 }
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303
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304 // draw Annotations
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305 Rectangle r= new Rectangle(0, 0, 0, 0);
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306 int maxLayer= 1; // loop at least once though layers.
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307
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308 for (int layer= 0; layer < maxLayer; layer++) {
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309 Iterator iter= fModel.getAnnotationIterator();
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310 while (iter.hasNext()) {
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311 IAnnotationPresentation annotationPresentation= null;
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312 Annotation annotation= (Annotation) iter.next();
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313
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314 int lay= IAnnotationAccessExtension.DEFAULT_LAYER;
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315 if (annotationAccessExtension !is null)
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316 lay= annotationAccessExtension.getLayer(annotation);
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317 else if (annotation instanceof IAnnotationPresentation) {
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318 annotationPresentation= (IAnnotationPresentation)annotation;
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319 lay= annotationPresentation.getLayer();
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320 }
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321 maxLayer= Math.max(maxLayer, lay+1); // dynamically update layer maximum
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322 if (lay !is layer) // wrong layer: skip annotation
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323 continue;
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324
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325 Position position= fModel.getPosition(annotation);
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326 if (position is null)
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327 continue;
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328
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329 if (!position.overlapsWith(topLeft, viewPort))
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330 continue;
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331
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332 try {
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333
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334 int offset= position.getOffset();
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335 int length= position.getLength();
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336
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337 int startLine= doc.getLineOfOffset(offset);
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338 if (startLine < topLine)
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339 startLine= topLine;
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340
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341 int endLine= startLine;
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342 if (length > 0)
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343 endLine= doc.getLineOfOffset(offset + length - 1);
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344 if (endLine > bottomLine)
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345 endLine= bottomLine;
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346
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347 startLine -= topLine;
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348 endLine -= topLine;
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349
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350 r.x= 0;
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351 r.y= JFaceTextUtil.computeLineHeight(styledText, 0, startLine, startLine) - fScrollPos;
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352
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353 r.width= d.x;
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354 int lines= endLine - startLine;
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355
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356 r.height= JFaceTextUtil.computeLineHeight(styledText, startLine, endLine + 1, (lines+1));
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357
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358 if (r.y < d.y && annotationAccessExtension !is null) // annotation within visible area
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359 annotationAccessExtension.paint(annotation, gc, fCanvas, r);
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360 else if (annotationPresentation !is null)
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361 annotationPresentation.paint(gc, fCanvas, r);
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362
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363 } catch (BadLocationException e) {
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364 }
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365 }
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366 }
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367 }
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368
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369 /**
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370 * Draws the vertical ruler w/o drawing the Canvas background. Uses
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371 * <code>ITextViewerExtension5</code> for its implementation. Will replace
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372 * <code>doPaint(GC)</code>.
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373 *
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374 * @param gc the GC to draw into
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375 */
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376 protected void doPaint1(GC gc) {
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377
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378 if (fModel is null || fTextViewer is null)
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379 return;
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380
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381 IAnnotationAccessExtension annotationAccessExtension= null;
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382 if (fAnnotationAccess instanceof IAnnotationAccessExtension)
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383 annotationAccessExtension= (IAnnotationAccessExtension) fAnnotationAccess;
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384
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385 ITextViewerExtension5 extension= (ITextViewerExtension5) fTextViewer;
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386 StyledText textWidget= fTextViewer.getTextWidget();
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387
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388 fScrollPos= textWidget.getTopPixel();
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389 Point dimension= fCanvas.getSize();
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390
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391 // draw Annotations
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392 Rectangle r= new Rectangle(0, 0, 0, 0);
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393 int maxLayer= 1; // loop at least once through layers.
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394
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395 for (int layer= 0; layer < maxLayer; layer++) {
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396 Iterator iter= fModel.getAnnotationIterator();
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397 while (iter.hasNext()) {
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398 IAnnotationPresentation annotationPresentation= null;
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399 Annotation annotation= (Annotation) iter.next();
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400
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401 int lay= IAnnotationAccessExtension.DEFAULT_LAYER;
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402 if (annotationAccessExtension !is null)
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403 lay= annotationAccessExtension.getLayer(annotation);
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404 else if (annotation instanceof IAnnotationPresentation) {
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405 annotationPresentation= (IAnnotationPresentation)annotation;
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406 lay= annotationPresentation.getLayer();
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407 }
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408 maxLayer= Math.max(maxLayer, lay+1); // dynamically update layer maximum
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409 if (lay !is layer) // wrong layer: skip annotation
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410 continue;
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411
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412 Position position= fModel.getPosition(annotation);
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413 if (position is null)
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414 continue;
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415
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416 IRegion widgetRegion= extension.modelRange2WidgetRange(new Region(position.getOffset(), position.getLength()));
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417 if (widgetRegion is null)
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418 continue;
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419
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420 int startLine= extension.widgetLineOfWidgetOffset(widgetRegion.getOffset());
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421 if (startLine is -1)
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422 continue;
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423
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424 int endLine= extension.widgetLineOfWidgetOffset(widgetRegion.getOffset() + Math.max(widgetRegion.getLength() -1, 0));
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425 if (endLine is -1)
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426 continue;
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427
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428 r.x= 0;
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429 r.y= JFaceTextUtil.computeLineHeight(textWidget, 0, startLine, startLine) - fScrollPos;
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430
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431 r.width= dimension.x;
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432 int lines= endLine - startLine;
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433
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434 r.height= JFaceTextUtil.computeLineHeight(textWidget, startLine, endLine + 1, lines+1);
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435
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436 if (r.y < dimension.y && annotationAccessExtension !is null) // annotation within visible area
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437 annotationAccessExtension.paint(annotation, gc, fCanvas, r);
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438 else if (annotationPresentation !is null)
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439 annotationPresentation.paint(gc, fCanvas, r);
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440 }
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441 }
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442 }
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443
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444 /**
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445 * Thread-safe implementation.
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446 * Can be called from any thread.
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447 */
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448 /*
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449 * @see IVerticalRuler#update()
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450 */
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451 public void update() {
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452 if (fCanvas !is null && !fCanvas.isDisposed()) {
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453 Display d= fCanvas.getDisplay();
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454 if (d !is null) {
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455 d.asyncExec(new Runnable() {
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456 public void run() {
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457 redraw();
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458 }
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459 });
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460 }
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461 }
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462 }
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463
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464 /**
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465 * Redraws the vertical ruler.
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466 */
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467 private void redraw() {
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468 if (fCanvas !is null && !fCanvas.isDisposed()) {
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469 GC gc= new GC(fCanvas);
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470 doubleBufferPaint(gc);
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471 gc.dispose();
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472 }
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473 }
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474
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475 /*
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476 * @see IVerticalRuler#setModel(IAnnotationModel)
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477 */
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478 public void setModel(IAnnotationModel model) {
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479 if (model !is fModel) {
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480
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481 if (fModel !is null)
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482 fModel.removeAnnotationModelListener(fInternalListener);
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483
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484 fModel= model;
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485
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486 if (fModel !is null)
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487 fModel.addAnnotationModelListener(fInternalListener);
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488
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489 update();
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|
490 }
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491 }
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492
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|
493 /*
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|
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494 * @see IVerticalRuler#getModel()
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|
|
495 */
|
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496 public IAnnotationModel getModel() {
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497 return fModel;
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498 }
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499
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500 /*
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|
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501 * @see IVerticalRulerInfo#getWidth()
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|
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502 */
|
|
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503 public int getWidth() {
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504 return fWidth;
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505 }
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|
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506
|
|
|
507 /*
|
|
|
508 * @see IVerticalRulerInfo#getLineOfLastMouseButtonActivity()
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|
|
509 */
|
|
|
510 public int getLineOfLastMouseButtonActivity() {
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|
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511 IDocument doc= fTextViewer.getDocument();
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|
|
512 if (doc is null || fLastMouseButtonActivityLine >= fTextViewer.getDocument().getNumberOfLines())
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|
|
513 fLastMouseButtonActivityLine= -1;
|
|
|
514 return fLastMouseButtonActivityLine;
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|
|
515 }
|
|
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516
|
|
|
517 /*
|
|
|
518 * @see IVerticalRulerInfo#toDocumentLineNumber(int)
|
|
|
519 */
|
|
|
520 public int toDocumentLineNumber(int y_coordinate) {
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|
|
521 if (fTextViewer is null || y_coordinate is -1)
|
|
|
522 return -1;
|
|
|
523
|
|
|
524 StyledText text= fTextViewer.getTextWidget();
|
|
|
525 int line= text.getLineIndex(y_coordinate);
|
|
|
526
|
|
|
527 if (line is text.getLineCount() - 1) {
|
|
|
528 // check whether y_coordinate exceeds last line
|
|
|
529 if (y_coordinate > text.getLinePixel(line + 1))
|
|
|
530 return -1;
|
|
|
531 }
|
|
|
532
|
|
|
533 return widgetLine2ModelLine(fTextViewer, line);
|
|
|
534 }
|
|
|
535
|
|
|
536 /**
|
|
|
537 * Returns the line of the viewer's document that corresponds to the given widget line.
|
|
|
538 *
|
|
|
539 * @param viewer the viewer
|
|
|
540 * @param widgetLine the widget line
|
|
|
541 * @return the corresponding line of the viewer's document
|
|
|
542 * @since 2.1
|
|
|
543 */
|
|
|
544 protected final static int widgetLine2ModelLine(ITextViewer viewer, int widgetLine) {
|
|
|
545
|
|
|
546 if (viewer instanceof ITextViewerExtension5) {
|
|
|
547 ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
|
|
|
548 return extension.widgetLine2ModelLine(widgetLine);
|
|
|
549 }
|
|
|
550
|
|
|
551 try {
|
|
|
552 IRegion r= viewer.getVisibleRegion();
|
|
|
553 IDocument d= viewer.getDocument();
|
|
|
554 return widgetLine += d.getLineOfOffset(r.getOffset());
|
|
|
555 } catch (BadLocationException x) {
|
|
|
556 }
|
|
|
557 return widgetLine;
|
|
|
558 }
|
|
|
559
|
|
|
560 /*
|
|
|
561 * @see IVerticalRulerExtension#setFont(Font)
|
|
|
562 * @since 2.0
|
|
|
563 */
|
|
|
564 public void setFont(Font font) {
|
|
|
565 }
|
|
|
566
|
|
|
567 /*
|
|
|
568 * @see IVerticalRulerExtension#setLocationOfLastMouseButtonActivity(int, int)
|
|
|
569 * @since 2.0
|
|
|
570 */
|
|
|
571 public void setLocationOfLastMouseButtonActivity(int x, int y) {
|
|
|
572 fLastMouseButtonActivityLine= toDocumentLineNumber(y);
|
|
|
573 }
|
|
|
574
|
|
|
575 /**
|
|
|
576 * Adds the given mouse listener.
|
|
|
577 *
|
|
|
578 * @param listener the listener to be added
|
|
|
579 * @deprecated will be removed
|
|
|
580 * @since 2.0
|
|
|
581 */
|
|
|
582 public void addMouseListener(MouseListener listener) {
|
|
|
583 if (fCanvas !is null && !fCanvas.isDisposed())
|
|
|
584 fCanvas.addMouseListener(listener);
|
|
|
585 }
|
|
|
586
|
|
|
587 /**
|
|
|
588 * Removes the given mouse listener.
|
|
|
589 *
|
|
|
590 * @param listener the listener to be removed
|
|
|
591 * @deprecated will be removed
|
|
|
592 * @since 2.0
|
|
|
593 */
|
|
|
594 public void removeMouseListener(MouseListener listener) {
|
|
|
595 if (fCanvas !is null && !fCanvas.isDisposed())
|
|
|
596 fCanvas.removeMouseListener(listener);
|
|
|
597 }
|
|
|
598 }
|
