1 /* Title: Tools/jEdit/src/text_area_painter.scala |
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2 Author: Makarius |
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3 |
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4 Painter setup for main jEdit text area, depending on common snapshot. |
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5 */ |
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6 |
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7 package isabelle.jedit |
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8 |
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9 |
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10 import isabelle._ |
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11 |
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12 import java.awt.{Graphics2D, Shape, Window, Color} |
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13 import java.awt.event.{MouseMotionAdapter, MouseAdapter, MouseEvent, |
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14 FocusAdapter, FocusEvent, WindowEvent, WindowAdapter} |
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15 import java.awt.font.TextAttribute |
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16 import java.text.AttributedString |
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17 import java.util.ArrayList |
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18 |
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19 import org.gjt.sp.util.Log |
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20 import org.gjt.sp.jedit.{OperatingSystem, Debug, View} |
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21 import org.gjt.sp.jedit.syntax.{DisplayTokenHandler, Chunk} |
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22 import org.gjt.sp.jedit.textarea.{TextAreaExtension, TextAreaPainter, TextArea} |
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23 |
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24 |
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25 class Text_Area_Painter(view: View, text_area: TextArea, get_rendering: () => Isabelle_Rendering) |
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26 { |
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27 private val buffer = text_area.getBuffer |
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28 |
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29 |
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30 /* robust extension body */ |
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31 |
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32 def robust_body[A](default: A)(body: => A): A = |
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33 { |
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34 try { |
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35 Swing_Thread.require() |
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36 if (buffer == text_area.getBuffer) body |
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37 else { |
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38 Log.log(Log.ERROR, this, ERROR("Implicit change of text area buffer")) |
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39 default |
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40 } |
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41 } |
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42 catch { case t: Throwable => Log.log(Log.ERROR, this, t); default } |
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43 } |
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44 |
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45 |
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46 /* original painters */ |
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47 |
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48 private def pick_extension(name: String): TextAreaExtension = |
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49 { |
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50 text_area.getPainter.getExtensions.iterator.filter(x => x.getClass.getName == name).toList |
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51 match { |
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52 case List(x) => x |
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53 case _ => error("Expected exactly one " + name) |
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54 } |
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55 } |
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56 |
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57 private val orig_text_painter = |
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58 pick_extension("org.gjt.sp.jedit.textarea.TextAreaPainter$PaintText") |
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59 |
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60 |
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61 /* common painter state */ |
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62 |
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63 @volatile private var painter_rendering: Isabelle_Rendering = null |
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64 @volatile private var painter_clip: Shape = null |
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65 |
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66 private val set_state = new TextAreaExtension |
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67 { |
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68 override def paintScreenLineRange(gfx: Graphics2D, |
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69 first_line: Int, last_line: Int, physical_lines: Array[Int], |
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70 start: Array[Int], end: Array[Int], y: Int, line_height: Int) |
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71 { |
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72 painter_rendering = get_rendering() |
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73 painter_clip = gfx.getClip |
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74 } |
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75 } |
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76 |
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77 private val reset_state = new TextAreaExtension |
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78 { |
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79 override def paintScreenLineRange(gfx: Graphics2D, |
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80 first_line: Int, last_line: Int, physical_lines: Array[Int], |
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81 start: Array[Int], end: Array[Int], y: Int, line_height: Int) |
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82 { |
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83 painter_rendering = null |
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84 painter_clip = null |
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85 } |
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86 } |
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87 |
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88 private def robust_rendering(body: Isabelle_Rendering => Unit) |
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89 { |
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90 robust_body(()) { body(painter_rendering) } |
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91 } |
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92 |
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93 |
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94 /* active areas within the text */ |
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95 |
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96 private class Active_Area[A]( |
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97 rendering: Isabelle_Rendering => Text.Range => Option[Text.Info[A]]) |
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98 { |
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99 private var the_info: Option[Text.Info[A]] = None |
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100 |
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101 def info: Option[Text.Info[A]] = the_info |
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102 |
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103 def update(new_info: Option[Text.Info[A]]) |
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104 { |
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105 val old_info = the_info |
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106 if (new_info != old_info) { |
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107 for { opt <- List(old_info, new_info); Text.Info(range, _) <- opt } |
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108 JEdit_Lib.invalidate_range(text_area, range) |
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109 the_info = new_info |
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110 } |
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111 } |
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112 |
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113 def update_rendering(r: Isabelle_Rendering, range: Text.Range) |
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114 { update(rendering(r)(range)) } |
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115 |
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116 def reset { update(None) } |
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117 } |
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118 |
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119 // owned by Swing thread |
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120 |
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121 private var control: Boolean = false |
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122 |
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123 private val highlight_area = new Active_Area[Color]((r: Isabelle_Rendering) => r.highlight _) |
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124 private val hyperlink_area = new Active_Area[Hyperlink]((r: Isabelle_Rendering) => r.hyperlink _) |
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125 private val active_areas = List(highlight_area, hyperlink_area) |
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126 private def active_reset(): Unit = active_areas.foreach(_.reset) |
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127 |
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128 private val focus_listener = new FocusAdapter { |
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129 override def focusLost(e: FocusEvent) { active_reset() } |
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130 } |
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131 |
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132 private val window_listener = new WindowAdapter { |
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133 override def windowIconified(e: WindowEvent) { active_reset() } |
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134 override def windowDeactivated(e: WindowEvent) { active_reset() } |
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135 } |
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136 |
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137 private val mouse_listener = new MouseAdapter { |
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138 override def mouseClicked(e: MouseEvent) { |
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139 hyperlink_area.info match { |
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140 case Some(Text.Info(range, link)) => link.follow(view) |
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141 case None => |
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142 } |
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143 } |
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144 } |
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145 |
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146 private val mouse_motion_listener = new MouseMotionAdapter { |
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147 override def mouseMoved(e: MouseEvent) { |
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148 control = if (OperatingSystem.isMacOS()) e.isMetaDown else e.isControlDown |
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149 if (control && !buffer.isLoading) { |
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150 JEdit_Lib.buffer_lock(buffer) { |
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151 val rendering = get_rendering() |
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152 val mouse_offset = text_area.xyToOffset(e.getX(), e.getY()) |
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153 val mouse_range = JEdit_Lib.point_range(buffer, mouse_offset) |
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154 active_areas.foreach(_.update_rendering(rendering, mouse_range)) |
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155 } |
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156 } |
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157 else active_reset() |
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158 } |
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159 } |
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160 |
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161 |
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162 /* tooltips */ |
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163 |
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164 private val tooltip_painter = new TextAreaExtension |
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165 { |
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166 override def getToolTipText(x: Int, y: Int): String = |
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167 { |
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168 robust_body(null: String) { |
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169 val rendering = get_rendering() |
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170 val offset = text_area.xyToOffset(x, y) |
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171 val range = Text.Range(offset, offset + 1) |
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172 val tip = |
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173 if (control) rendering.tooltip(range) |
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174 else rendering.tooltip_message(range) |
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175 tip.map(Isabelle.tooltip(_)) getOrElse null |
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176 } |
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177 } |
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178 } |
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179 |
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180 |
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181 /* text background */ |
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182 |
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183 private val background_painter = new TextAreaExtension |
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184 { |
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185 override def paintScreenLineRange(gfx: Graphics2D, |
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186 first_line: Int, last_line: Int, physical_lines: Array[Int], |
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187 start: Array[Int], end: Array[Int], y: Int, line_height: Int) |
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188 { |
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189 robust_rendering { rendering => |
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190 val ascent = text_area.getPainter.getFontMetrics.getAscent |
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191 |
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192 for (i <- 0 until physical_lines.length) { |
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193 if (physical_lines(i) != -1) { |
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194 val line_range = JEdit_Lib.proper_line_range(buffer, start(i), end(i)) |
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195 |
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196 // background color (1) |
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197 for { |
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198 Text.Info(range, color) <- rendering.background1(line_range) |
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199 r <- JEdit_Lib.gfx_range(text_area, range) |
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200 } { |
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201 gfx.setColor(color) |
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202 gfx.fillRect(r.x, y + i * line_height, r.length, line_height) |
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203 } |
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204 |
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205 // background color (2) |
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206 for { |
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207 Text.Info(range, color) <- rendering.background2(line_range) |
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208 r <- JEdit_Lib.gfx_range(text_area, range) |
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209 } { |
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210 gfx.setColor(color) |
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211 gfx.fillRect(r.x + 2, y + i * line_height + 2, r.length - 4, line_height - 4) |
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212 } |
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213 |
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214 // squiggly underline |
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215 for { |
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216 Text.Info(range, color) <- rendering.squiggly_underline(line_range) |
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217 r <- JEdit_Lib.gfx_range(text_area, range) |
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218 } { |
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219 gfx.setColor(color) |
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220 val x0 = (r.x / 2) * 2 |
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221 val y0 = r.y + ascent + 1 |
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222 for (x1 <- Range(x0, x0 + r.length, 2)) { |
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223 val y1 = if (x1 % 4 < 2) y0 else y0 + 1 |
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224 gfx.drawLine(x1, y1, x1 + 1, y1) |
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225 } |
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226 } |
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227 } |
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228 } |
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229 } |
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230 } |
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231 } |
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232 |
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233 |
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234 /* text */ |
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235 |
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236 private def paint_chunk_list(rendering: Isabelle_Rendering, |
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237 gfx: Graphics2D, line_start: Text.Offset, head: Chunk, x: Float, y: Float): Float = |
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238 { |
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239 val clip_rect = gfx.getClipBounds |
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240 val painter = text_area.getPainter |
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241 val font_context = painter.getFontRenderContext |
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242 |
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243 var w = 0.0f |
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244 var chunk = head |
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245 while (chunk != null) { |
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246 val chunk_offset = line_start + chunk.offset |
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247 if (x + w + chunk.width > clip_rect.x && |
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248 x + w < clip_rect.x + clip_rect.width && chunk.accessable) |
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249 { |
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250 val chunk_range = Text.Range(chunk_offset, chunk_offset + chunk.length) |
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251 val chunk_str = if (chunk.str == null) " " * chunk.length else chunk.str |
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252 val chunk_font = chunk.style.getFont |
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253 val chunk_color = chunk.style.getForegroundColor |
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254 |
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255 def string_width(s: String): Float = |
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256 if (s.isEmpty) 0.0f |
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257 else chunk_font.getStringBounds(s, font_context).getWidth.toFloat |
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258 |
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259 val caret_range = |
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260 if (text_area.isCaretVisible) |
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261 JEdit_Lib.point_range(buffer, text_area.getCaretPosition) |
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262 else Text.Range(-1) |
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263 |
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264 val markup = |
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265 for { |
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266 r1 <- rendering.text_color(chunk_range, chunk_color) |
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267 r2 <- r1.try_restrict(chunk_range) |
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268 } yield r2 |
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269 |
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270 val padded_markup = |
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271 if (markup.isEmpty) |
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272 Iterator(Text.Info(chunk_range, chunk_color)) |
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273 else |
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274 Iterator( |
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275 Text.Info(Text.Range(chunk_range.start, markup.head.range.start), chunk_color)) ++ |
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276 markup.iterator ++ |
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277 Iterator(Text.Info(Text.Range(markup.last.range.stop, chunk_range.stop), chunk_color)) |
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278 |
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279 var x1 = x + w |
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280 gfx.setFont(chunk_font) |
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281 for (Text.Info(range, color) <- padded_markup if !range.is_singularity) { |
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282 val str = chunk_str.substring(range.start - chunk_offset, range.stop - chunk_offset) |
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283 gfx.setColor(color) |
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284 |
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285 range.try_restrict(caret_range) match { |
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286 case Some(r) if !r.is_singularity => |
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287 val i = r.start - range.start |
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288 val j = r.stop - range.start |
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289 val s1 = str.substring(0, i) |
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290 val s2 = str.substring(i, j) |
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291 val s3 = str.substring(j) |
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292 |
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293 if (!s1.isEmpty) gfx.drawString(s1, x1, y) |
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294 |
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295 val astr = new AttributedString(s2) |
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296 astr.addAttribute(TextAttribute.FONT, chunk_font) |
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297 astr.addAttribute(TextAttribute.FOREGROUND, painter.getCaretColor) |
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298 astr.addAttribute(TextAttribute.SWAP_COLORS, TextAttribute.SWAP_COLORS_ON) |
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299 gfx.drawString(astr.getIterator, x1 + string_width(s1), y) |
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300 |
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301 if (!s3.isEmpty) |
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302 gfx.drawString(s3, x1 + string_width(str.substring(0, j)), y) |
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303 |
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304 case _ => |
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305 gfx.drawString(str, x1, y) |
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306 } |
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307 x1 += string_width(str) |
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308 } |
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309 } |
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310 w += chunk.width |
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311 chunk = chunk.next.asInstanceOf[Chunk] |
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312 } |
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313 w |
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314 } |
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315 |
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316 private val text_painter = new TextAreaExtension |
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317 { |
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318 override def paintScreenLineRange(gfx: Graphics2D, |
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319 first_line: Int, last_line: Int, physical_lines: Array[Int], |
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320 start: Array[Int], end: Array[Int], y: Int, line_height: Int) |
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321 { |
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322 robust_rendering { rendering => |
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323 val clip = gfx.getClip |
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324 val x0 = text_area.getHorizontalOffset |
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325 val fm = text_area.getPainter.getFontMetrics |
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326 var y0 = y + fm.getHeight - (fm.getLeading + 1) - fm.getDescent |
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327 |
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328 for (i <- 0 until physical_lines.length) { |
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329 val line = physical_lines(i) |
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330 if (line != -1) { |
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331 val screen_line = first_line + i |
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332 val chunks = text_area.getChunksOfScreenLine(screen_line) |
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333 if (chunks != null) { |
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334 val line_start = buffer.getLineStartOffset(line) |
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335 gfx.clipRect(x0, y + line_height * i, Integer.MAX_VALUE, line_height) |
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336 val w = paint_chunk_list(rendering, gfx, line_start, chunks, x0, y0).toInt |
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337 gfx.clipRect(x0 + w.toInt, 0, Integer.MAX_VALUE, Integer.MAX_VALUE) |
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338 orig_text_painter.paintValidLine(gfx, |
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339 screen_line, line, start(i), end(i), y + line_height * i) |
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340 gfx.setClip(clip) |
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341 } |
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342 } |
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343 y0 += line_height |
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344 } |
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345 } |
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346 } |
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347 } |
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348 |
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349 |
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350 /* foreground */ |
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351 |
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352 private val foreground_painter = new TextAreaExtension |
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353 { |
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354 override def paintScreenLineRange(gfx: Graphics2D, |
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355 first_line: Int, last_line: Int, physical_lines: Array[Int], |
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356 start: Array[Int], end: Array[Int], y: Int, line_height: Int) |
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357 { |
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358 robust_rendering { rendering => |
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359 for (i <- 0 until physical_lines.length) { |
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360 if (physical_lines(i) != -1) { |
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361 val line_range = JEdit_Lib.proper_line_range(buffer, start(i), end(i)) |
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362 |
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363 // foreground color |
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364 for { |
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365 Text.Info(range, color) <- rendering.foreground(line_range) |
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366 r <- JEdit_Lib.gfx_range(text_area, range) |
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367 } { |
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368 gfx.setColor(color) |
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369 gfx.fillRect(r.x, y + i * line_height, r.length, line_height) |
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370 } |
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371 |
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372 // highlight range -- potentially from other snapshot |
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373 for { |
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374 info <- highlight_area.info |
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375 Text.Info(range, color) <- info.try_restrict(line_range) |
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376 r <- JEdit_Lib.gfx_range(text_area, range) |
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377 } { |
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378 gfx.setColor(color) |
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379 gfx.fillRect(r.x, y + i * line_height, r.length, line_height) |
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380 } |
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381 |
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382 // hyperlink range -- potentially from other snapshot |
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383 for { |
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384 info <- hyperlink_area.info |
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385 Text.Info(range, _) <- info.try_restrict(line_range) |
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386 r <- JEdit_Lib.gfx_range(text_area, range) |
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387 } { |
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388 gfx.setColor(rendering.hyperlink_color) |
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389 gfx.drawRect(r.x, y + i * line_height, r.length - 1, line_height - 1) |
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390 } |
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391 } |
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392 } |
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393 } |
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394 } |
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395 } |
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396 |
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397 |
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398 /* caret -- outside of text range */ |
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399 |
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400 private class Caret_Painter(before: Boolean) extends TextAreaExtension |
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401 { |
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402 override def paintValidLine(gfx: Graphics2D, |
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403 screen_line: Int, physical_line: Int, start: Int, end: Int, y: Int) |
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404 { |
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405 robust_rendering { _ => |
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406 if (before) gfx.clipRect(0, 0, 0, 0) |
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407 else gfx.setClip(painter_clip) |
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408 } |
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409 } |
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410 } |
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411 |
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412 private val before_caret_painter1 = new Caret_Painter(true) |
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413 private val after_caret_painter1 = new Caret_Painter(false) |
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414 private val before_caret_painter2 = new Caret_Painter(true) |
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415 private val after_caret_painter2 = new Caret_Painter(false) |
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416 |
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417 private val caret_painter = new TextAreaExtension |
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418 { |
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419 override def paintValidLine(gfx: Graphics2D, |
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420 screen_line: Int, physical_line: Int, start: Int, end: Int, y: Int) |
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421 { |
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422 robust_rendering { _ => |
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423 if (text_area.isCaretVisible) { |
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424 val caret = text_area.getCaretPosition |
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425 if (start <= caret && caret == end - 1) { |
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426 val painter = text_area.getPainter |
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427 val fm = painter.getFontMetrics |
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428 |
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429 val offset = caret - text_area.getLineStartOffset(physical_line) |
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430 val x = text_area.offsetToXY(physical_line, offset).x |
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431 gfx.setColor(painter.getCaretColor) |
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432 gfx.drawRect(x, y, JEdit_Lib.char_width(text_area) - 1, fm.getHeight - 1) |
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433 } |
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434 } |
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435 } |
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436 } |
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437 } |
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438 |
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439 |
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440 /* activation */ |
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441 |
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442 def activate() |
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443 { |
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444 val painter = text_area.getPainter |
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445 painter.addExtension(TextAreaPainter.LOWEST_LAYER, set_state) |
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446 painter.addExtension(TextAreaPainter.LINE_BACKGROUND_LAYER + 1, tooltip_painter) |
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447 painter.addExtension(TextAreaPainter.LINE_BACKGROUND_LAYER + 1, background_painter) |
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448 painter.addExtension(TextAreaPainter.TEXT_LAYER, text_painter) |
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449 painter.addExtension(TextAreaPainter.CARET_LAYER - 1, before_caret_painter1) |
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450 painter.addExtension(TextAreaPainter.CARET_LAYER + 1, after_caret_painter1) |
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451 painter.addExtension(TextAreaPainter.BLOCK_CARET_LAYER - 1, before_caret_painter2) |
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452 painter.addExtension(TextAreaPainter.BLOCK_CARET_LAYER + 1, after_caret_painter2) |
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453 painter.addExtension(TextAreaPainter.BLOCK_CARET_LAYER + 2, caret_painter) |
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454 painter.addExtension(500, foreground_painter) |
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455 painter.addExtension(TextAreaPainter.HIGHEST_LAYER, reset_state) |
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456 painter.removeExtension(orig_text_painter) |
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457 painter.addMouseListener(mouse_listener) |
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458 painter.addMouseMotionListener(mouse_motion_listener) |
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459 text_area.addFocusListener(focus_listener) |
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460 view.addWindowListener(window_listener) |
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461 } |
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462 |
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463 def deactivate() |
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464 { |
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465 val painter = text_area.getPainter |
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466 view.removeWindowListener(window_listener) |
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467 text_area.removeFocusListener(focus_listener) |
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468 painter.removeMouseMotionListener(mouse_motion_listener) |
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469 painter.removeMouseListener(mouse_listener) |
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470 painter.addExtension(TextAreaPainter.TEXT_LAYER, orig_text_painter) |
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471 painter.removeExtension(reset_state) |
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472 painter.removeExtension(foreground_painter) |
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473 painter.removeExtension(caret_painter) |
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474 painter.removeExtension(after_caret_painter2) |
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475 painter.removeExtension(before_caret_painter2) |
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476 painter.removeExtension(after_caret_painter1) |
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477 painter.removeExtension(before_caret_painter1) |
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478 painter.removeExtension(text_painter) |
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479 painter.removeExtension(background_painter) |
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480 painter.removeExtension(tooltip_painter) |
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481 painter.removeExtension(set_state) |
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482 } |
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483 } |
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484 |
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