move components/client to rt (runtime) directory

src/rt/shell/history.ts

@@ -0,0 +1,48 @@
+interface HistoryFile {
+	inner: string[],
+	cursor: number,
+	cursor_reset: () => void
+}
+interface History {
+	file: HistoryFile
+	add: (cmd: string) => void,
+	index_up: (ps1input: HTMLInputElement) => void,
+	index_down: (ps1input: HTMLInputElement) => void
+}
+
+const history = {} as History
+history.file = {} as HistoryFile
+history.file.inner = []
+history.file.cursor = 0
+history.file.cursor_reset = function() {
+	this.cursor = 0
+}
+
+history.add = function(cmd: string) {
+	if (this.file.inner[this.file.inner.length-1] !== cmd) {
+		this.file.inner.push(cmd)
+	}
+}
+
+history.index_up = function(ps1input: HTMLInputElement) {
+	const item = this.file.inner[this.file.cursor]
+	if (item) {
+		this.file.cursor+=1
+		ps1input.value = item
+	}
+}
+
+history.index_down = function(ps1input: HTMLInputElement) {
+	if (this.file.cursor!==0) {
+		this.file.cursor-=1
+		if (this.file.cursor!==0) {
+			const item = this.file.inner[this.file.cursor-1]
+			if (item) { ps1input.value = item }
+		} else {
+			this.file.cursor_reset()
+			ps1input.value = ""
+		}
+	}
+}
+
+export default history