add simple history

react/resume/src/emulator/commands/cat.js

@@ -1,5 +1,29 @@
-const fs = require('fs');
+import { Terminal } from 'xterm';
+const fs = require('../fs');
 
+/**
+ * 
+ * @param { string[] } argv 
+ * @param { Terminal } terminal 
+ */
 module.exports = (argv, terminal) => {
-    terminal.writeln('hi')
+    if (argv.indexOf('--help') != -1) {
+        terminal.writeln('Usage: cat [file] [-n]');
+        terminal.writeln('  -n --number: show lines numbers');
+        terminal.writeln('     --help:   show this help');
+        return;
+    }
+    const numbers = (argv.indexOf('-n') != -1) || (argv.indexOf('--number') != -1);
+    
+    let files = argv.filter(x => { return !x.startsWith('-') });
+    files.shift();
+    files.forEach(file => {
+        const lines = fs.readFileSync(file).toString().split('\n');
+        let i = 1;
+        lines.forEach(line => {
+            if (numbers) terminal.write('\033[35m' + i + ' |\033[0m ');
+            terminal.writeln(line);
+            i++;
+        })
+    })
 }

react/resume/src/emulator/zsh.js

@@ -18,6 +18,7 @@ let dom;
 
 const prompt = '\033[1;32muser@blek.codes \033[36m~ $ \033[0m';
 let cmd = '';
+let lastcmd = '';
 
 function text_prompt() {
     return prompt.replace(/[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g, '');
@@ -48,28 +49,30 @@ function exec_file(f) {
 
 function exec_cmd() {
     let c = cmd;
+    const command = c.split(' ')[0];
     reset_cmd(c);
+    lastcmd = c;
 
-    if (c == '') {
+    if (command == '') {
         print_prompt();
         return;
     }
 
     // if path
-    if (c.match(/^((\.|\.\.)\/|\/).+$/gm)) {
+    if (command.match(/^((\.|\.\.)\/|\/).+$/gm)) {
-        exec_file(c);
+        exec_file(command);
         terminal.writeln('');
         print_prompt();
         return;
     }
 
-    if (cmds[c] != undefined) {
+    if (cmds[command] != undefined) {
-        cmds[c](c.split(' '), terminal);
+        cmds[command](c.split(' '), terminal);
         print_prompt();
         return;
     }
     
-    terminal.writeln('zsh: command not found: ' + c);
+    terminal.writeln('zsh: command not found: ' + command);
     print_prompt();
 }
 
@@ -108,6 +111,13 @@ function control_char(id, dom) {
             exec_cmd();
             break;
         
+        case 38:
+            if (lastcmd == '') break;
+            cmd = lastcmd;
+            reprint_prompt();
+            terminal.write(lastcmd);
+            break;
+        
         // Ctrl+c
         case 67:
             if (dom.ctrlKey) {
@@ -135,7 +145,7 @@ function control_char(id, dom) {
 function key(e) {
     /** @type {KeyboardEvent} */
     const dom = e.domEvent;
-    if (dom.key.length == 1 && !(dom.ctrlKey || dom.altKey || dom.shiftKey)) {
+    if (dom.key.length == 1 && !(dom.ctrlKey || dom.altKey)) {
         pr_char(e.domEvent.key);
     } else {
         control_char(e.domEvent.keyCode, dom)