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enigma_ts.js
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enigma_ts.js
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"use strict";
class Layer {
constructor(x, y, w, h) {
this.x = x;
this.y = y;
this.w = w;
this.h = h;
this.color = "#FFFFFF";
}
setTextColor(color) {
this.color = color || this.color;
}
setText(text) {
this.text = text;
}
}
(() => {
const frame = document.createElement("canvas"), requestAnimationFrame = window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.msRequestAnimationFrame, numbers = [[], [], [], []], offsets = [[], [], [], []], order = [[], [], [], []], textLayer = [], scrollTo = [], digits = [
[1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1],
[1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
[1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1],
[1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1],
[1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1],
[1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 1],
[1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1],
[1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1],
[1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1],
[1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1]
], pixel = {
width: 5,
height: 5
}, colors = {
LightGray: "#AAAAAA",
Black: "#000000",
JazzberryJam: "#AA0055",
White: "#FFFFFF"
};
let ctx, colWidth, center, lineHeight, halfLineHeight;
const fillOrder = (i) => {
for (let j = 0; j < 10; ++j) {
order[i][j] = j;
}
for (let n = 0; n < 10; ++n) {
const k = Math.floor((Math.random() * 10));
if (n !== k) {
const tmp = order[i][k];
order[i][k] = order[i][n];
order[i][n] = tmp;
}
}
};
const fillOffsets = (i) => {
for (let n = 0; n < 10; ++n) {
offsets[i][n] = order[i][n] + 2;
}
};
const fillNumbers = (i) => {
for (let n = 0; n < 10; ++n) {
let p = (order[i][n]) + 2;
numbers[i][p] = n;
if (p < 4) {
p += 10;
numbers[i][p] = n;
}
else if (p >= 10) {
p -= 10;
numbers[i][p] = n;
}
}
};
const drawDigit = (num, x, y, color) => {
const paddingX = x + (colWidth - pixel.width * 3) / 2 >> 0, from = center - halfLineHeight, to = center + halfLineHeight;
x = paddingX;
y = y + ((lineHeight - pixel.height * 5) / 2 >> 0) - pixel.height;
for (let i = 0; i < 15; ++i) {
if (i % 3 === 0) {
x = paddingX;
y += pixel.height;
}
if (digits[num][i] === 1) {
if (!(x > frame.width || y > frame.height || x + pixel.width < 0 || y + pixel.height < 0)) {
if ((y > from) && (y < to)) {
ctx.globalCompositeOperation = "xor";
ctx.fillStyle = colors.White;
ctx.fillRect(x, y, pixel.width, pixel.height);
ctx.globalCompositeOperation = "source-atop";
ctx.fillStyle = colors.White;
ctx.fillRect(x, y, pixel.width, pixel.height);
ctx.globalCompositeOperation = "destination-over";
}
else {
ctx.globalCompositeOperation = "source-over";
}
ctx.fillStyle = color;
ctx.fillRect(x, y, pixel.width, pixel.height);
}
}
x += pixel.width;
}
};
const drawLayer = (layer) => {
let y = layer.y;
ctx.globalCompositeOperation = "source-over";
ctx.fillStyle = colors.Black;
ctx.fillRect(layer.x, layer.y, layer.w, layer.h);
ctx.globalCompositeOperation = "destination-out";
ctx.fillStyle = layer.color;
ctx.fillRect(layer.x, center - halfLineHeight, layer.w, lineHeight);
for (let i = 0; i < layer.text.length; ++i) {
drawDigit(layer.text[i], layer.x, y, layer.color);
y += lineHeight;
}
ctx.globalCompositeOperation = "destination-over";
ctx.fillStyle = colors.JazzberryJam;
ctx.fillRect(layer.x, center - halfLineHeight, layer.w, lineHeight);
};
const animateLayer = (i, duration) => {
const start = new Date().getTime(), end = start + duration, layer = textLayer[i], current = layer.y, distance = scrollTo[i] - current, step = () => {
const timestamp = new Date().getTime(), progress = Math.min((duration - (end - timestamp)) / duration, 1);
layer.y = current + (distance * progress);
drawLayer(layer);
if (progress < 1) {
requestAnimationFrame(step);
}
};
return step();
};
const setDigit = (i, num) => {
const prev = scrollTo[i];
scrollTo[i] = (offsets[i][num] * -lineHeight) + center - halfLineHeight;
if (prev !== scrollTo[i]) {
animateLayer(i, 1000);
}
};
const displayTime = (date) => {
const h = date.getHours(), m = date.getMinutes();
setDigit(0, h / 10 >> 0);
setDigit(1, h % 10);
setDigit(2, m / 10 >> 0);
setDigit(3, m % 10);
};
const checkTime = () => {
let m = null;
return () => {
const d = new Date(), n = d.getMinutes();
if (m !== n) {
displayTime(d);
}
m = n;
};
};
const init = () => {
frame.width = 144;
frame.height = 168;
document.body.appendChild(frame);
ctx = frame.getContext("2d");
colWidth = frame.width / 4;
center = frame.height / 2;
lineHeight = frame.height / 4;
halfLineHeight = frame.height / 8;
for (let i = 0; i < 4; ++i) {
fillOrder(i);
fillOffsets(i);
fillNumbers(i);
textLayer[i] = new Layer(i * colWidth, 0, colWidth, 800);
textLayer[i].setTextColor(colors.LightGray);
textLayer[i].setText(numbers[i]);
}
displayTime(new Date());
window.setInterval(checkTime(), 1000);
};
init();
})();