From 279d1afbc242ec5b4cb733fb08b851966259dfba Mon Sep 17 00:00:00 2001
From: Lisa Milne <lisamilne618@gmail.com>
Date: Sat, 25 Nov 2023 11:46:06 +1000
Subject: [PATCH] preparing for tty reading

---
 clite/commands.js | 16 ++++++++++
 clite/core.js     | 75 +++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 86 insertions(+), 5 deletions(-)

diff --git a/clite/commands.js b/clite/commands.js
index c07417f..a489c4d 100644
--- a/clite/commands.js
+++ b/clite/commands.js
@@ -639,5 +639,21 @@ Options:
 	return 0;
 });
 
+if (window.location.protocol == 'file:')
+clite.commands.load('test',function(args,env,io) {
+	var stdio = io.include('stdio');
+	var fd = stdio.open('/dev/tty');
+	stdio.write(fd,'Hello world');
+	function rcb(data) {
+		stdio.write(fd,data);
+		stdio.close(fd);
+		io.exit(0);
+	}
+
+	stdio.read(fd,rcb);
+
+	return null;
+});
+
 // insert commands above this line
 }
diff --git a/clite/core.js b/clite/core.js
index 418363c..4a9dc50 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -183,6 +183,43 @@ var clite = {
 				};
 				n.perms = 'crw-rw-rw-';
 				n.data.isdev = true;
+				// /dev/tty - the main tty device, writing to it prints to the terminal, reading from it reads keyboard input
+				vfsapi.mkFile('/dev/tty');
+				n = vfsapi.getNode('/dev/tty');
+				if (!n) {
+					clite.log.write('tty failure');
+					return false;
+				}
+				n.data.content = {
+					receive:{
+						callback:null,
+						buffer:[],
+						input:function(str) {
+							if (n.data.content.receive.callback != null) {
+								clite.core.execSafeAsync(function() {
+									n.data.content.receive.callback(str);
+								});
+								n.data.content.receive.callback = null;
+								return;
+							}
+							n.data.content.receive.buffer.push(str);
+						}
+					},
+					read:function(cb) {
+						if (n.data.content.receive.buffer.length > 0) {
+							var str = n.data.content.receive.buffer.shift();
+							cb(str);
+							return true;
+						}
+						n.data.content.receive.callback = cb;
+						return true;
+					},
+					write:clite.term.writeLine
+				};
+				clite.term.data.handler = n.data.content.receive.input;
+				n.perms = 'crw-rw-rw-';
+				n.data.isdev = true;
+				n.data.istty = true;
 				return true;
 			}
 
@@ -664,10 +701,18 @@ clite.io = {
 				delete fd;
 			} catch(err) {}
 		}
-		clite.io.read = function(fd) {
+		clite.io.read = function(fd,cb) {
 			if (fd.node.data.content == null)
 				return null;
-			if (fd.node.data.isdev) {
+			if (fd.node.data.istty) {
+				try{
+					if (typeof cb === 'function') {
+						fd.node.data.content.read(cb);
+						return true;
+					}
+				} catch(err) {}
+				return false;
+			}else if (fd.node.data.isdev) {
 				if (typeof fd.node.data.content !== 'string') {
 					try{
 						return fd.node.data.content.read();
@@ -684,10 +729,18 @@ clite.io = {
 			}
 			return fd.node.data.content[fd.pos++];
 		}
-		clite.io.readLine = function(fd) {
+		clite.io.readLine = function(fd,cb) {
 			if (fd.node.data.content == null)
 				return null;
-			if (fd.node.data.isdev) {
+			if (fd.node.data.istty) {
+				try{
+					if (typeof cb === 'function') {
+						fd.node.data.content.read(cb);
+						return true;
+					}
+				} catch(err) {}
+				return false;
+			}else if (fd.node.data.isdev) {
 				if (typeof fd.node.data.content !== 'string') {
 					try{
 						return fd.node.data.content.read();
@@ -712,6 +765,8 @@ clite.io = {
 			return l;
 		}
 		clite.io.readAll = function(fd) {
+			if (fd.node.data.istty)
+				return false;
 			if (fd.node.data.isdev) {
 				if (typeof fd.node.data.content !== 'string') {
 					try{
@@ -921,6 +976,7 @@ clite.vfs = {
 					isdir:false,
 					islink:false,
 					isdev:false,
+					istty:false,
 					parent:null,
 					content:null
 				}
@@ -1117,7 +1173,8 @@ clite.term = {
 	data:{
 		type:'text',
 		form:null,
-		field:null
+		field:null,
+		handler:null
 	},
 	events:{
 		keydown:function(e) {
@@ -1132,6 +1189,13 @@ clite.term = {
 			return true;
 		},
 		keyup:function(e) {
+			//if (e.key.length > 1 && e.key != 'Spacebar' && clite.term.data.handler != null) {
+				//if (e.key == 'Enter') {
+					//clite.term.data.handler(e.target.value);
+				//}else{
+					//clite.term.data.handler(e.key);
+				//}
+			//}
 			try {
 				if (e.key == 'Down' || e.key == 'ArrowDown') {
 					clite.shell.history.down();
@@ -1184,6 +1248,7 @@ clite.term = {
 			clite.term.genForm();
 	},
 	preventInput:function() {
+		return;
 		var f = document.getElementById('form');
 		if (!f)
 			return;