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import kotlinx.browser.document
import kotlinx.browser.window
import org.w3c.dom.Element
import org.w3c.dom.asList
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) {
abstract fun render(columns: Int, rows: Int): List<List<CharacterRun>>
}
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
fun openActivity(activity: Activity) {
activityStack.addLast(activity)
invalidateRender()
}
fun render() {
if (renderElement == null) return
if (!shouldRerender) return
shouldRerender = false
activityStack.last()
}
fun invalidateRender() {
shouldRerender = true
window.requestAnimationFrame { render() }
}
fun resize(newColumns: Int, newRows: Int) {
invalidateRender()
}
// TODO: Handle resizes of the renderElement
}
class WebOS {
private val _consoles = mutableListOf<Console>()
val consoles get() = _consoles.toList()
fun registerConsole(element: Element) {
_consoles.add(Console(this, element))
}
}
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