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authornea <romangraef@gmail.com>2021-08-20 15:33:32 +0200
committernea <romangraef@gmail.com>2021-08-20 15:33:58 +0200
commit5042498c8fe12751c1b6560ae1fde07e7cd78259 (patch)
tree688aa93978ffffd0b15c639768fdad6f17609bdd /src/jsMain/kotlin/WebOS.kt
parent65a6ffeb6761994d4d69011c87f23fe074f7a1f7 (diff)
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-rw-r--r--src/jsMain/kotlin/WebOS.kt345
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diff --git a/src/jsMain/kotlin/WebOS.kt b/src/jsMain/kotlin/WebOS.kt
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--- a/src/jsMain/kotlin/WebOS.kt
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@@ -1,345 +0,0 @@
-import io.FileService
-import io.Path
-import io.PrimitiveFileService
-import io.PrimitiveINode
-import kotlinx.browser.document
-import kotlinx.browser.window
-import org.w3c.dom.Element
-import org.w3c.dom.Node
-import org.w3c.dom.asList
-import org.w3c.dom.events.Event
-import org.w3c.dom.events.KeyboardEvent
-import kotlin.properties.Delegates
-
-fun main() {
- console.log("Hello from Kotlin")
- val webos = WebOS()
- document.body?.addEventListener("load", {
- document.body?.querySelectorAll(".webosconsole")?.asList()?.forEach {
- if (it !is Element) return@forEach
- webos.registerConsole(it)
- }
- })
-}
-
-data class CharacterRun(val text: String, val color: String)
-
-abstract class Activity(val console: Console) {
-
- open fun handleKeyPress(key: Key) {}
- open fun update() {}
- abstract fun render(columns: Int, rows: Int): List<List<CharacterRun>>
-}
-
-class ShellRunner(console: Console) : Activity(console) {
-
- val history = mutableListOf<String>()
-
- val shellProgramStack = ArrayDeque<ShellProgram>()
-
- var lastLine = ""
-
- fun newLine() {
- history.add(lastLine)
- lastLine = ""
- console.invalidateRender()
- }
-
- fun println(it: String = "") {
- print(it)
- newLine()
- }
-
- fun print(it: String) {
- lastLine += it
- console.invalidateRender()
- }
-
- override fun update() {
- shellProgramStack.lastOrNull()?.update()
- }
-
- fun getInput(): String? {
- if (inputBuffer.contains("\n")) {
- val r = inputBuffer.substringBefore("\n")
- inputBuffer = inputBuffer.substringAfter("\n")
- return r
- }
- return null
- }
-
- override fun render(columns: Int, rows: Int): List<List<CharacterRun>> =
- history.map { listOf(CharacterRun(it.take(columns), "white")) }.takeLast(rows - 1) + listOf(
- listOf(
- CharacterRun(
- lastLine + inputBuffer,
- "white"
- )
- )
- )
-
- var inputBuffer = ""
-
- override fun handleKeyPress(key: Key) = when (key) {
- is Key.Printable -> {
- inputBuffer += key.char
- }
- is Key.Enter -> {
- inputBuffer += "\n"
- }
- else -> Unit
- }
-
- fun <T : ShellProgram> openShellProgram(program: (ShellRunner) -> T): ShellRunner = openShellProgram(program(this))
-
- fun <T : ShellProgram> openShellProgram(program: T): ShellRunner {
- shellProgramStack.addLast(program)
- return this
- }
-
-}
-
-abstract class ShellProgram(val shellRunner: ShellRunner) {
-
- abstract fun update(): Unit
-}
-
-sealed class Key {
- object Alt : Key()
- object AltGraph : Key()
- object CapsLock : Key()
- object Control : Key()
- object Function : Key()
- object FunctionLock : Key()
- object Hyper : Key()
- object Meta : Key()
- object NumLock : Key()
- object Shift : Key()
- object Super : Key()
- object Symbol : Key()
- object SymbolLock : Key()
- object Enter : Key()
- object Tab : Key()
- sealed class Arrow : Key() {
- object Down : Key()
- object Left : Key()
- object Right : Key()
- object Up : Key()
- }
-
- object End : Key()
- object Home : Key()
- object PageUp : Key()
- object PageDown : Key()
- object Backspace : Key()
- object Clear : Key()
- object Copy : Key()
- object CrSel : Key()
- object Cut : Key()
- object Delete : Key()
- object EraseEof : Key()
- object ExSel : Key()
- object Insert : Key()
- object Paste : Key()
- object Redo : Key()
- object Undo : Key()
- object Accept : Key()
- object Again : Key()
- object Attn : Key()
- object Cancel : Key()
- object ContextMenu : Key()
- object Escape : Key()
- object Execute : Key()
- object Find : Key()
- object Finish : Key()
- object Help : Key()
- class Printable(val char: Char) : Key()
- class FunctionN(val n: Int) : Key()
- companion object {
-
- fun from(string: String) = when (string) {
- "Alt" -> Alt
- "AltGraph" -> AltGraph
- "CapsLock" -> CapsLock
- "Control" -> Control
- "Fn" -> Function
- "FnLock" -> FunctionLock
- "Hyper" -> Hyper
- "Meta" -> Meta
- "NumLock" -> NumLock
- "Shift" -> Shift
- "Super" -> Super
- "Symbol" -> Symbol
- "SymbolLock" -> SymbolLock
- "Enter" -> Enter
- "Tab" -> Tab
- "Down" -> Arrow.Down
- "Left" -> Arrow.Left
- "Right" -> Arrow.Right
- "Up" -> Arrow.Up
- "End" -> End
- "Home" -> Home
- "PageUp" -> PageUp
- "PageDown" -> PageDown
- "Backspace" -> Backspace
- "Clear" -> Clear
- "Copy" -> Copy
- "CrSel" -> CrSel
- "Cut" -> Cut
- "Delete" -> Delete
- "EraseEof" -> EraseEof
- "ExSel" -> ExSel
- "Insert" -> Insert
- "Paste" -> Paste
- "Redo" -> Redo
- "Undo" -> Undo
- "Accept" -> Accept
- "Again" -> Again
- "Attn" -> Attn
- "Cancel" -> Cancel
- "ContextMenu" -> ContextMenu
- "Escape" -> Escape
- "Execute" -> Execute
- "Find" -> Find
- "Finish" -> Finish
- "Help" -> Help
- else -> if (string.length == 1)
- Printable(string.first())
- else if (string.first() == 'F')
- FunctionN(string.substring(1).toInt())
- else throw TODO()
- }
- }
-}
-
-class Login(shellRunner: ShellRunner) : ShellProgram(shellRunner) {
-
- override fun update() {
- while (true)
- when (state) {
- 0 -> {
- shellRunner.print("Username: ")
- state = 1
- }
- 1 -> {
- val inp = shellRunner.getInput() ?: return
- shellRunner.println(inp)
- shellRunner.print("Password: ")
- username = inp
- state = 2
- }
- 2 -> {
- val inp = shellRunner.getInput() ?: return
- shellRunner.println(inp)
- shellRunner.println("Login complete)")
- password = inp
- // TODO: check password and set user
- state = 3
- }
- 3 -> {
- TODO()
- }
- }
-
- }
-
- var state = 0
- var username = ""
- var password = ""
-
-}
-
-class Console(val os: WebOS, val renderElement: Element?) {
-
- val isVirtual get() = renderElement == null
- val activityStack = ArrayDeque<Activity>()
-
- var columns: Int = 80
- var rows: Int = 46
-
- var shouldRerender = true
-
- var currentUser: User? = null
-
- private var _workingDirectory: Path.Absolute? = null
-
- var workingDirectory: Path.Absolute
- get() = _workingDirectory ?: currentUser?.homeDirectory ?: Path.root
- set(value) {
- _workingDirectory = value
- }
-
- init {
- renderElement?.addEventListener("keydown", ::computeKeypressEvent)
- }
-
- fun computeKeypressEvent(event: Event) {
- if (!isInFocus()) return
- if (event !is KeyboardEvent) return
- activityStack.lastOrNull()?.handleKeyPress(Key.from(event.key))
- }
-
- private fun isInFocus(): Boolean = renderElement.containsOrIs(document.activeElement)
-
- private fun Node?.containsOrIs(node: Node?) = this == node || this?.contains(node) ?: false
-
- fun <T : Activity> openActivity(activity: (Console) -> T): Console = openActivity(activity(this))
-
- fun <T : Activity> openActivity(activity: T): Console {
- activityStack.addLast(activity)
- invalidateRender()
- return this
- }
-
- fun render() {
- if (renderElement == null) return
- if (!shouldRerender) return
- shouldRerender = false
- val x = activityStack.lastOrNull()?.render(columns, rows)
- console.log(x)
- }
-
- fun invalidateRender() {
- shouldRerender = true
- window.requestAnimationFrame { render() }
- }
-
- fun resize(newColumns: Int, newRows: Int) {
- invalidateRender()
- }
-
- // TODO: Handle resizes of the renderElement
-
- fun update(): Unit {
- activityStack.lastOrNull()?.update()
- }
-
- var updateInterval by Delegates.notNull<Int>()
-
- fun start(): Console {
- updateInterval = window.setInterval(::update, 10)
- return openActivity(ShellRunner(this).also { it.openShellProgram(Login(it)) })
- }
-
- fun destroy() {
- window.clearInterval(updateInterval)
- }
-
-}
-
-class WebOS {
-
- val hostname: String = "host"
- private val _consoles = mutableListOf<Console>()
- val consoles get() = _consoles.toList()
- val files: FileService<PrimitiveINode> = PrimitiveFileService()
- fun registerConsole(element: Element) {
- _consoles.add(Console(this, element))
- }
-}
-
-data class User(
- val name: String,
- val homeDirectory: Path.Absolute,
- val isRoot: Boolean = false,
-)