Mercurial > cgi-bin > hgweb.cgi > ClipMan

annotate src/name/blackcap/clipman/Main.kt @ 16:88703ca72fc3

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Make an efficiency improvement: cache the scrollPane.
author David Barts <n5jrn@me.com>
date Tue, 21 Jan 2020 13:07:35 -0800
parents 732f92dc3bc6
children 9dd58db4d15a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * The entry point and most of the view logic is here.
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3 */
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4 package name.blackcap.clipman
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5
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6 import java.awt.BorderLayout
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7 import java.awt.Color
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8 import java.awt.Container
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9 import java.awt.Dimension
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10 import java.awt.Font
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11 import java.awt.Toolkit;
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12 import java.awt.datatransfer.*
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13 import java.awt.event.WindowEvent
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14 import java.awt.event.WindowListener
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15 import java.util.Date
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16 import java.util.concurrent.Semaphore
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17 import java.util.logging.Level
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18 import java.util.logging.Logger
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19 import javax.swing.*
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20 import javax.swing.border.*
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21 import javax.swing.text.JTextComponent
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22 import javax.swing.text.html.StyleSheet
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23 import javax.swing.text.html.HTMLEditorKit
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24 import kotlin.concurrent.thread
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25 import org.jsoup.Jsoup
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26 import org.jsoup.nodes.*
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27
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28 /* name we call ourselves */
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29 val MYNAME = "ClipMan"
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30
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31 /* default sizes */
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32 val CPWIDTH = 640
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33 val CPHEIGHT = 480
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34
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35 /* border widths */
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36 val PANEL_BORDER = 9
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37 val OUTER_BORDER_TOP = 3
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38 val OUTER_BORDER = 9
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39 val INNER_BORDER = 1
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40 val MARGIN_BORDER = 3
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41
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42 /* default font sizes in the text-display panes */
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43 val MONO_SIZE = 14
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44 val PROP_SIZE = 16
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45
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46 /* kills the updating thread (and does a system exit) when needed */
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47 class KillIt(val thr: Thread) : WindowListener {
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48 // events we don't care about
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49 override fun windowActivated(e: WindowEvent) {}
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50 override fun windowClosed(e: WindowEvent) {}
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51 override fun windowDeactivated(e: WindowEvent) {}
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52 override fun windowDeiconified(e: WindowEvent) {}
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53 override fun windowIconified(e: WindowEvent) {}
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54 override fun windowOpened(e: WindowEvent) {}
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55
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56 // and the one we do
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57 override fun windowClosing(e: WindowEvent) {
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58 thr.run { interrupt(); join() }
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59 LOGGER.log(Level.INFO, "execution complete")
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60 System.exit(0)
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61 }
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62 }
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63
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64 class ClipText: JTextPane() {
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65 override fun getMaximumSize(): Dimension {
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66 return Dimension(Int.MAX_VALUE, preferredSize.height)
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67 }
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68 }
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69
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70 /* the updating thread */
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71 class UpdateIt(val queue: PasteboardQueue, val interval: Int): Thread() {
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72 @Volatile var enabled = true
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73 private val outerBorder =
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74 MatteBorder(OUTER_BORDER_TOP, OUTER_BORDER, OUTER_BORDER, OUTER_BORDER,
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75 queue.parent.background)
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76 private val stdBorder =
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77 CompoundBorder(LineBorder(Color.GRAY, INNER_BORDER),
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78 EmptyBorder(MARGIN_BORDER, MARGIN_BORDER, MARGIN_BORDER, MARGIN_BORDER))
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79
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80 override fun run() {
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81 var oldContents = ""
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82 var newContents = ""
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83 while (true) {
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84 if (enabled) {
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85 var contents = PasteboardItem.read()
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86 if (contents != null) {
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87 newContents = when (contents) {
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88 is PasteboardItem.Plain -> contents.plain
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89 is PasteboardItem.HTML -> contents.html
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90 }
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91 if (oldContents != newContents) {
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92 var stdWidth: Int? = null
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93 inSynSwingThread {
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94 stdWidth = queue.parent.size.width - 2 * (PANEL_BORDER+OUTER_BORDER+INNER_BORDER+MARGIN_BORDER)
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95 }
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96 var widget = JPanel().apply {
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97 layout = BoxLayout(this, BoxLayout.Y_AXIS)
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98 background = queue.parent.background
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99 border = outerBorder
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100 }
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101 when (contents) {
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102 is PasteboardItem.Plain -> widget.run {
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103 add(stdLabel("Plain text"))
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104 add(ClipText().apply {
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105 contentType = "text/plain"
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106 text = contents.plain
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107 font = Font(Font.MONOSPACED, Font.PLAIN, MONO_SIZE)
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108 border = stdBorder
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109 autoSize(stdWidth!!)
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110 setEditable(false)
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111 alignmentX = JTextPane.LEFT_ALIGNMENT
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112 })
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113 }
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114 is PasteboardItem.HTML -> widget.run {
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115 add(stdLabel("Styled text"))
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116 val (html, style) = preproc(contents.html)
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117 val hek = HTMLEditorKit().apply {
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118 style.addStyleSheet(styleSheet)
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119 styleSheet = style
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120 }
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121 add(ClipText().apply {
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122 editorKit = hek
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123 text = html
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124 border = stdBorder
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125 autoSize(stdWidth!!)
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126 setEditable(false)
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127 alignmentX = JTextPane.LEFT_ALIGNMENT
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128 })
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129 }
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130 }
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131 queue.add(QueueItem(widget, contents))
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132 oldContents = newContents
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133 }
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134 }
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135 }
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136 if (Thread.interrupted()) {
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137 return
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138 }
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139 try {
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140 Thread.sleep(interval - System.currentTimeMillis() % interval)
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141 } catch (e: InterruptedException) {
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142 return
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143 }
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144 }
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145 }
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146
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147 private fun stdLabel(text: String) = JLabel(text).apply {
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148 horizontalAlignment = JLabel.LEFT
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149 alignmentX = JLabel.LEFT_ALIGNMENT
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150 }
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151
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152 private fun preproc(html: String): Pair<String, StyleSheet> {
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153 val sty = StyleSheet().apply {
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154 addRule("body { font-family: serif; font-size: %d; }".format(PROP_SIZE))
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155 addRule("code, kbd, pre, samp, tt { font-family: monospace; font-size: %d; }".format(MONO_SIZE))
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156 }
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157 val scrubbed = Jsoup.parse(html).run {
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158 select("style").forEach {
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159 it.dataNodes().forEach { sty.addRule(it.wholeData) }
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160 }
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161 select(":root>head>meta").remove()
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162 outputSettings()
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163 .charset(CHARSET_NAME)
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164 .syntax(Document.OutputSettings.Syntax.xml)
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165 outerHtml()
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166 }
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167 return Pair(scrubbed, sty)
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168 }
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169 }
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170
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171 fun main(args: Array<String>) {
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172 LOGGER.log(Level.INFO, "beginning execution")
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173 setLookFeel()
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174 val frame = JFrame(MYNAME)
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175 val con = JPanel().apply {
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176 layout = BoxLayout(this, BoxLayout.Y_AXIS)
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177 border = EmptyBorder(PANEL_BORDER, PANEL_BORDER, PANEL_BORDER, PANEL_BORDER)
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178 background = frame.background
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179 }
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180 inSynSwingThread {
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181 frame.apply {
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182 contentPane.add(
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183 JScrollPane(con).apply {
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184 verticalScrollBarPolicy = ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS
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185 horizontalScrollBarPolicy = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER
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186 preferredSize = Dimension(CPWIDTH, CPHEIGHT)
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187 background = frame.background
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188 }, BorderLayout.CENTER)
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189 pack()
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190 setVisible(true)
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191 }
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192 }
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193 val queue = PasteboardQueue(con, 10)
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194 val updater = UpdateIt(queue, 1000).apply { start() }
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195 inSwingThread { frame.addWindowListener(KillIt(updater)) }
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196 }
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197
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198 fun setLookFeel() {
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199 inSwingThread {
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200 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
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201 }
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202 }
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203
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204 fun inSwingThread(block: () -> Unit) {
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205 SwingUtilities.invokeLater(Runnable(block))
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206 }
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207
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208 fun inSynSwingThread(block: () -> Unit) {
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209 val ready = Semaphore(0)
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210 inSwingThread {
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211 block()
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212 ready.release()
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213 }
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214 ready.acquire()
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215 }
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216
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217 fun JTextComponent.autoSize(width: Int): Unit {
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218 val SLOP = 10
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219 val dim = Dimension(width, width)
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220 preferredSize = dim
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221 size = dim
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222 val r = modelToView(document.length)
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223 preferredSize = Dimension(width, r.y + r.height + SLOP)
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224 }