curioustorvald/tsvm
1
0
Fork 0
mirror of https://github.com/curioustorvald/tsvm.git synced 2026-03-08 12:11:51 +09:00
Code Issues Packages Projects Releases Wiki Activity

command history navigation sorta works

Browse Source
This commit is contained in:
minjaesong
2020-05-19 11:54:13 +09:00
parent 619257ecf2
commit a1e053c53e
1 changed files with 53 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
assets/jscon.js
View File

@@ -1,8 +1,14 @@
function readConsoleInput() {
println("JS Console");
var cmdHistory = []; // zeroth element is the oldest
var cmdHistoryScroll = 0; // 0 for outside-of-buffer, 1 for most recent
while (true) {
print("JS> ");
var cmdbuf = "";
var key = -1;
while (key != 10 && key != 13) {
key = vm.readKey();
while (true) {
var key = vm.readKey();
// printable chars
if (key >= 32 && key <= 126) {
var s = String.fromCharCode(key);
@@ -10,35 +16,54 @@ function readConsoleInput() {
print(s);
}
// backspace
else if (key == 8 && cmdbuf.length > 0) {
else if (key === 8 && cmdbuf.length > 0) {
cmdbuf = cmdbuf.substring(0, cmdbuf.length - 1);
print(String.fromCharCode(key));
}
// up down key
else if (key >= 19 && key <= 20) {
return key;
}
// left right key
else if (key >= 19 && key <= 20) {
//
}
}
return cmdbuf;
}
// enter
else if (key === 10 || key === 13) {
println();
try {
println(eval(cmdbuf));
}
catch (e) {
println(e);
}
finally {
if (cmdbuf.trim().length > 0)
cmdHistory.push(cmdbuf);
println("JS Console");
while (true) {
print("JS> ");
var cmdbuf = readConsoleInput();
if (typeof cmdbuf == "string") {
println();
try {
println(eval(cmdbuf));
cmdHistoryScroll = 0;
break;
}
}
catch (e) {
println(e);
// up arrow
else if (key === 19 && cmdHistory.length > 0 && cmdHistoryScroll < cmdHistory.length) {
cmdHistoryScroll += 1;
// back the cursor in order to type new cmd
for (xx = 0; xx < cmdbuf.length; xx++) print(String.fromCharCode(8));
cmdbuf = cmdHistory[cmdHistory.length - cmdHistoryScroll];
// re-type the new command
print(cmdbuf);
}
// down arrow
else if (key === 20) {
if (cmdHistoryScroll > 0) {
// back the cursor in order to type new cmd
for (xx = 0; xx < cmdbuf.length; xx++) print(String.fromCharCode(8));
cmdbuf = cmdHistory[cmdHistory.length - cmdHistoryScroll];
// re-type the new command
print(cmdbuf);
cmdHistoryScroll -= 1;
}
else {
// back the cursor in order to type new cmd
for (xx = 0; xx < cmdbuf.length; xx++) print(String.fromCharCode(8));
cmdbuf = "";
}
}
}
}