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reading keys using con.getch

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This commit is contained in:
minjaesong
2021-04-07 21:14:04 +09:00
parent 907cb9c376
commit 922e24c6fd
1 changed files with 29 additions and 19 deletions
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48
assets/disk0/tvdos/bin/edit.js
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@@ -1,5 +1,6 @@
let scroll = 0;
let textbuffer = ["The quick brown fox","jumps over a lazy dog 12345678901234567890", "Pack my box with", "five dozen liquor jugs", "The quick brown fox","jumps over a lazy dog 12345678901234567890", "Pack my box with", "five dozen liquor jugs"];
//let textbuffer = ["The quick brown fox","jumps over a lazy dog 12345678901234567890", "Pack my box with", "five dozen liquor jugs", "The quick brown fox","jumps over a lazy dog 12345678901234567890", "Pack my box with", "five dozen liquor jugs"];
let textbuffer = [""];
let cursorRow = 0;
let cursorCol = 0;
let exit = false;
@@ -138,6 +139,7 @@ function drawTextbuffer() {
}
function displayBulletin(text) {
bulletinShown = true;
let txt = text.substring(0, windowWidth - 10);
con.move(windowHeight - 1, (windowWidth - txt.length) / 2);
con.color_pair(COL_BACK, COL_TEXT);
@@ -146,6 +148,7 @@ function displayBulletin(text) {
gotoText();
}
function dismissBulletin() {
bulletinShown = false;
drawTextLine(paintHeight - 1);
gotoText();
}
@@ -155,42 +158,49 @@ function gotoText() {
}
function hitCtrlS() {
sys.poke(-40, 1);
return (sys.peek(-41) == 47 && (sys.peek(-42) == 129 || sys.peek(-42) == 130));
}
function hitCtrlX() {
sys.poke(-40, 1);
return (sys.peek(-41) == 52 && (sys.peek(-42) == 129 || sys.peek(-42) == 130));
}
function hitAny() {
sys.poke(-40, 1);
return sys.peek(-41) != 0;
}
function appendText(code) {
if (textbuffer[cursorRow] === undefined)
textbuffer[cursorRow] = String.fromCharCode(code);
else
textbuffer[cursorRow] += String.fromCharCode(code);
cursorCol += 1;
drawTextLine(cursorRow - scroll);
gotoText();
}
reset_status();
drawMain();
drawTextbuffer();
let keyDown = false;
let bulletinShown = false;
while (!exit) {
// capture keys down
sys.poke(-40, 1);
let key = con.getch();
if (!keyDown) {
if (hitAny()) keyDown = true;
serial.println(key);
if (hitCtrlX()) {
exit = true;
}
else if (hitCtrlS()) {
displayBulletin("Wrote NaN lines");
}
else if (hitAny()) {
if (key == 24) // Ctrl-X
exit = true;
else if (key == 19 && !bulletinShown) {
displayBulletin(`Wrote ${100 + ((Math.random() * 900)|0)} lines`);
}
else if (key >= 32) { // printables (excludes \n)
if (bulletinShown) {
dismissBulletin();
}
}
sys.poke(-40, 1);
if (keyDown && !hitAny()) {
keyDown = false;
appendText(key);
}
serial.println("keydown = "+keyDown);
}