anotther compiler inference bug andlyng.io.console improvements
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@@ -36,6 +36,97 @@ import kotlin.time.Duration.Companion.milliseconds
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import kotlin.time.Duration.Companion.seconds
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import kotlin.time.TimeSource
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internal object JvmConsoleKeyDecoder {
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fun decode(firstCode: Int, nextCode: (Long) -> Int?): ConsoleEvent.KeyDown {
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if (firstCode == 27) {
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val next = nextCode(25L)
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if (next == null || next < 0) {
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return key("Escape")
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}
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if (next == '['.code || next == 'O'.code) {
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val sb = StringBuilder()
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sb.append(next.toChar())
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var i = 0
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while (i < 6) {
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val c = nextCode(25L) ?: break
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if (c < 0) break
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sb.append(c.toChar())
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if (c.toChar().isLetter() || c == '~'.code) break
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i += 1
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}
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return keyFromAnsiSequence(sb.toString()) ?: key("Escape")
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}
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val base = decodePlainKey(next)
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return ConsoleEvent.KeyDown(
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key = base.key,
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code = base.code,
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ctrl = base.ctrl,
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alt = true,
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shift = base.shift,
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meta = false,
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)
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}
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return decodePlainKey(firstCode)
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}
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private fun decodePlainKey(code: Int): ConsoleEvent.KeyDown = when (code) {
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3 -> key("c", ctrl = true)
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9 -> key("Tab")
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10, 13 -> key("Enter")
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127, 8 -> key("Backspace")
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32 -> key(" ")
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else -> {
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if (code in 1..26) {
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val ch = ('a'.code + code - 1).toChar().toString()
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key(ch, ctrl = true)
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} else {
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val ch = code.toChar().toString()
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key(ch, shift = ch.length == 1 && ch[0].isLetter() && ch[0].isUpperCase())
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}
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}
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}
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private fun keyFromAnsiSequence(seq: String): ConsoleEvent.KeyDown? {
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val shift = seq.contains(";2")
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val alt = seq.contains(";3")
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val ctrl = seq.contains(";5")
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val key = when {
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seq.endsWith("A") -> "ArrowUp"
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seq.endsWith("B") -> "ArrowDown"
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seq.endsWith("C") -> "ArrowRight"
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seq.endsWith("D") -> "ArrowLeft"
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seq.endsWith("H") -> "Home"
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seq.endsWith("F") -> "End"
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seq.endsWith("~") -> when (seq.substringAfter('[').substringBefore(';').substringBefore('~')) {
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"2" -> "Insert"
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"3" -> "Delete"
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"5" -> "PageUp"
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"6" -> "PageDown"
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else -> null
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}
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else -> null
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} ?: return null
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return key(key, ctrl = ctrl, alt = alt, shift = shift)
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}
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private fun key(
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value: String,
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ctrl: Boolean = false,
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alt: Boolean = false,
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shift: Boolean = false,
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): ConsoleEvent.KeyDown {
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require(value.isNotEmpty()) { "ConsoleEvent.KeyDown.key must never be empty" }
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return ConsoleEvent.KeyDown(
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key = value,
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code = null,
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ctrl = ctrl,
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alt = alt,
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shift = shift,
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meta = false,
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)
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}
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}
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/**
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* JVM console implementation:
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* - output/capabilities/input use a single JLine terminal instance
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@@ -508,40 +599,7 @@ object JvmLyngConsole : LyngConsole {
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val code = reader.read(120L)
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if (code == NonBlockingReader.READ_EXPIRED) return null
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if (code < 0) throw EOFException("non-blocking reader returned EOF")
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return decodeKey(code) { timeout -> readNextCode(reader, timeout) }
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}
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private fun decodeKey(code: Int, nextCode: (Long) -> Int?): ConsoleEvent.KeyDown {
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if (code == 27) {
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val next = nextCode(25L)
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if (next == null || next < 0) {
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return key("Escape")
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}
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if (next == '['.code || next == 'O'.code) {
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val sb = StringBuilder()
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sb.append(next.toChar())
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var i = 0
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while (i < 6) {
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val c = nextCode(25L) ?: break
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if (c < 0) break
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sb.append(c.toChar())
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if (c.toChar().isLetter() || c == '~'.code) break
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i += 1
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}
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return keyFromAnsiSequence(sb.toString()) ?: key("Escape")
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}
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// Alt+key
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val base = decodePlainKey(next)
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return ConsoleEvent.KeyDown(
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key = base.key,
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code = base.code,
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ctrl = base.ctrl,
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alt = true,
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shift = base.shift,
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meta = false
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)
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}
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return decodePlainKey(code)
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return JvmConsoleKeyDecoder.decode(code) { timeout -> readNextCode(reader, timeout) }
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}
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private fun readNextCode(reader: NonBlockingReader, timeoutMs: Long): Int? {
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@@ -550,53 +608,4 @@ object JvmLyngConsole : LyngConsole {
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if (c < 0) throw EOFException("non-blocking reader returned EOF while decoding key sequence")
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return c
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}
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private fun decodePlainKey(code: Int): ConsoleEvent.KeyDown = when (code) {
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3 -> key("c", ctrl = true)
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9 -> key("Tab")
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10, 13 -> key("Enter")
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127, 8 -> key("Backspace")
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32 -> key(" ")
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else -> {
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if (code in 1..26) {
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val ch = ('a'.code + code - 1).toChar().toString()
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key(ch, ctrl = true)
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} else {
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val ch = code.toChar().toString()
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key(ch, shift = ch.length == 1 && ch[0].isLetter() && ch[0].isUpperCase())
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}
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}
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}
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private fun keyFromAnsiSequence(seq: String): ConsoleEvent.KeyDown? = when (seq) {
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"[A", "OA" -> key("ArrowUp")
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"[B", "OB" -> key("ArrowDown")
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"[C", "OC" -> key("ArrowRight")
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"[D", "OD" -> key("ArrowLeft")
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"[H", "OH" -> key("Home")
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"[F", "OF" -> key("End")
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"[2~" -> key("Insert")
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"[3~" -> key("Delete")
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"[5~" -> key("PageUp")
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"[6~" -> key("PageDown")
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else -> null
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}
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private fun key(
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value: String,
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ctrl: Boolean = false,
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alt: Boolean = false,
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shift: Boolean = false,
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): ConsoleEvent.KeyDown {
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require(value.isNotEmpty()) { "ConsoleEvent.KeyDown.key must never be empty" }
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return ConsoleEvent.KeyDown(
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key = value,
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code = null,
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ctrl = ctrl,
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alt = alt,
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shift = shift,
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meta = false
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)
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}
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}
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