annotate src/name/blackcap/clipman/Misc.kt @ 34:376643a09b52

Finally fixed the alignment. Wotta PITA...
author David Barts <n5jrn@me.com>
date Thu, 30 Jan 2020 19:38:59 -0800
parents 0c6c18a733b7
children 33fbe3a78d84
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1 /*
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2 * Miscellaneous utility stuff.
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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.Dimension
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7 import java.awt.Toolkit
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8 import javax.swing.*
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9 import javax.swing.text.JTextComponent
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10
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11 /**
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12 * Name of the character set (encoding) we preferentially use for many
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13 * things.
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14 */
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15 val CHARSET_NAME = "UTF-8"
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16
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17 /**
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18 * Allows a val to have lateinit functionality. It is an error to attempt
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19 * to retrieve this object's value unless it has been set, and it is an
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20 * error to attempt to set the value of an already-set object.
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21 * @param &lt;T&gt; type of the associated value
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22 */
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23 class LateInit<T> {
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24 private var _v: T? = null
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25
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26 /**
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27 * The value associated with this object. The name of this property is
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28 * deliberately short.
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29 */
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30 var v: T
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31 get() {
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32 if (_v == null) {
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33 throw IllegalStateException("cannot retrieve un-initialized value")
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34 } else {
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35 return _v!!
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36 }
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37 }
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38 @Synchronized set(value) {
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39 if (_v != null) {
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40 throw IllegalStateException("cannot set already-initialized value")
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41 }
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42 _v = value
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43 }
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44 }
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45
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46 /**
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47 * Run something in the Swing thread, asynchronously.
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48 * @param block lambda containing code to run
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49 */
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50 fun inSwingThread(block: () -> Unit) {
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51 SwingUtilities.invokeLater(Runnable(block))
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52 }
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53
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54 /**
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55 * Run something in the Swing thread, synchronously.
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56 * @param block lambda containing code to run
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57 */
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58 fun inSynSwingThread(block: () -> Unit) {
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59 SwingUtilities.invokeAndWait(Runnable(block))
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60 }
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61
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62 /**
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63 * Autosize a JTextComponent to a given width.
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64 * @param width the width
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65 */
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66 fun JTextComponent.autoSize(width: Int): Unit {
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67 val SLOP = 10
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68 val dim = Dimension(width, width)
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69 preferredSize = dim
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70 size = dim
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71 val r = modelToView(document.length)
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72 preferredSize = Dimension(width, r.y + r.height + SLOP)
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73 }
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74
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75 /**
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76 * Make a shortcut for a menu item, using the standard combining key
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77 * (control, command, etc.) for the system we're on.
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78 * @param key KeyEvent constant describing the key
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79 */
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80 fun JMenuItem.makeShortcut(key: Int): Unit {
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81 val SC_KEY_MASK = Toolkit.getDefaultToolkit().menuShortcutKeyMask
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82 setAccelerator(KeyStroke.getKeyStroke(key, SC_KEY_MASK))
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83 }
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84
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85 /**
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86 * Given a MenuElement object, get the item whose text matches the
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87 * specified text.
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88 * @param text to match
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89 * @return first matched element, null if no match found
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90 */
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91 fun MenuElement.getItem(name: String) : JMenuItem? {
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92 subElements.forEach {
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93 val jMenuItem = it.component as? JMenuItem
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94 if (jMenuItem?.text == name) {
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95 return jMenuItem
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96 }
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97 }
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98 return null
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99 }
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100