fix history indexing down

src/components/client/keys.ts

@@ -8,8 +8,8 @@ interface EnterArgs {
 	readonly closure: InputClosure
 }
 interface Keys {
-	enter:      (input: EnterArgs) => void,
-	up_arrow:   (ps1input: HTMLInputElement) => void,
+	enter: (input: EnterArgs) => void,
+	up_arrow: (ps1input: HTMLInputElement) => void,
 	down_arrow: (ps1input: HTMLInputElement) => void,
 }
 

src/components/client/shell/command/list.ts

@@ -1,4 +1,4 @@
-import history_cmd from "./builtin/history"
+import history from "./builtin/history"
 import clear from "./builtin/clear"
 import pwd from "./builtin/pwd"
 import cat from "./builtin/cat"
@@ -8,12 +8,13 @@ import ls from "./builtin/ls"
 type Term = HTMLElement
 type Args = string[]
 type Command = (term: Term, args: Args) => boolean
+
 interface CommandsList {
 	[index: string]: Command,
 }
 
 const commands: CommandsList = {
-	["history"]: history_cmd,
+	["history"]: history,
 	["clear"]: clear,
 	["pwd"]: pwd,
 	["cat"]: cat,

src/components/client/shell/history.ts

@@ -4,9 +4,9 @@ interface HistoryFile {
 	cursor_reset: () => void
 }
 interface History {
-	file:       HistoryFile
-	add:        (cmd: string) => void,
-	index_up:   (ps1input: HTMLInputElement) => void,
+	file: HistoryFile
+	add: (cmd: string) => void,
+	index_up: (ps1input: HTMLInputElement) => void,
 	index_down: (ps1input: HTMLInputElement) => void
 }
 
@@ -36,7 +36,7 @@ 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]
+			const item = this.file.inner[this.file.cursor-1]
 			if (item) { ps1input.value = item }
 		} else {
 			this.file.cursor_reset()