pxt-calliope/sim/visuals/neopixel.ts

/// <reference path="../../node_modules/pxt-core/built/pxtsim.d.ts"/>
/// <reference path="../../libs/core/dal.d.ts"/>
/// <reference path="../../libs/core/enums.d.ts"/>

namespace pxsim.visuals {
    const PIXEL_SPACING = PIN_DIST * 3;
    const PIXEL_RADIUS = PIN_DIST;
    const CANVAS_WIDTH = 1.2 * PIN_DIST;
    const CANVAS_HEIGHT = 12 * PIN_DIST;
    const CANVAS_VIEW_WIDTH = CANVAS_WIDTH;
    const CANVAS_VIEW_HEIGHT = CANVAS_HEIGHT;
    const CANVAS_VIEW_PADDING = PIN_DIST * 4;
    const CANVAS_LEFT = 1.4 * PIN_DIST;
    const CANVAS_TOP = PIN_DIST;

    // For the instructions parts list
    export function mkNeoPixelPart(xy: Coord = [0, 0]): SVGElAndSize {
        const NP_PART_XOFF = -13.5;
        const NP_PART_YOFF = -11;
        const NP_PART_WIDTH = 87.5;
        const NP_PART_HEIGHT = 190;
        const NEOPIXEL_PART_IMG = `<svg viewBox="-5 -1 53 112" xmlns="http://www.w3.org/2000/svg" xmlns:bx="https://boxy-svg.com">
  <rect x="2.5" width="38" height="100" style="fill: rgb(68, 68, 68);"/>
  <rect x="11.748" y="3.2" width="1.391" height="2.553" style="fill: none; stroke-linejoin: round; stroke-width: 3; stroke: rgb(165, 103, 52);"/>
  <rect x="20.75" y="3.2" width="1.391" height="2.553" style="fill: none; stroke-linejoin: round; stroke-width: 3; stroke: rgb(165, 103, 52);"/>
  <rect x="29.75" y="3.2" width="1.391" height="2.553" style="fill: none; stroke-linejoin: round; stroke-width: 3; stroke: rgb(165, 103, 52);"/>
  <g>
    <rect x="9" y="16.562" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="9" y="22.562" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="9" y="28.563" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="11.607" y="14.833" width="19.787" height="18.697" style="fill: rgb(0, 0, 0);"/>
    <ellipse style="fill: rgb(216, 216, 216);" cx="21.5" cy="24.181" rx="7" ry="7"/>
  </g>
  <path d="M -7.25 -103.2 L -2.5 -100.003 L -12 -100.003 L -7.25 -103.2 Z" style="fill: rgb(68, 68, 68);" transform="matrix(-1, 0, 0, -1, 0, 0)" bx:shape="triangle -12 -103.2 9.5 3.197 0.5 0 1@ad6f5cac"/>
  <path d="M -16.75 -103.197 L -12 -100 L -21.5 -100 L -16.75 -103.197 Z" style="fill: rgb(68, 68, 68);" transform="matrix(-1, 0, 0, -1, 0, 0)" bx:shape="triangle -21.5 -103.197 9.5 3.197 0.5 0 1@07d73149"/>
  <path d="M -26.25 -103.2 L -21.5 -100.003 L -31 -100.003 L -26.25 -103.2 Z" style="fill: rgb(68, 68, 68);" transform="matrix(-1, 0, 0, -1, 0, 0)" bx:shape="triangle -31 -103.2 9.5 3.197 0.5 0 1@54403e2d"/>
  <path d="M -35.75 -103.197 L -31 -100 L -40.5 -100 L -35.75 -103.197 Z" style="fill: rgb(68, 68, 68);" transform="matrix(-1, 0, 0, -1, 0, 0)" bx:shape="triangle -40.5 -103.197 9.5 3.197 0.5 0 1@21c9b772"/>
  <g transform="matrix(1, 0, 0, 1, 0.000002, 29.999994)">
    <rect x="9" y="16.562" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="9" y="22.562" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="9" y="28.563" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="11.607" y="14.833" width="19.787" height="18.697" style="fill: rgb(0, 0, 0);"/>
    <ellipse style="fill: rgb(216, 216, 216);" cx="21.5" cy="24.181" rx="7" ry="7"/>
  </g>
  <g transform="matrix(1, 0, 0, 1, 0.000005, 59.999992)">
    <rect x="9" y="16.562" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="9" y="22.562" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="9" y="28.563" width="25" height="3.238" style="fill: rgb(216, 216, 216);"/>
    <rect x="11.607" y="14.833" width="19.787" height="18.697" style="fill: rgb(0, 0, 0);"/>
    <ellipse style="fill: rgb(216, 216, 216);" cx="21.5" cy="24.181" rx="7" ry="7"/>
  </g>
</svg>`;
        let [x, y] = xy;
        let l = x + NP_PART_XOFF;
        let t = y + NP_PART_YOFF;
        let w = NP_PART_WIDTH;
        let h = NP_PART_HEIGHT;
        let img = <SVGImageElement>svg.elt("image");
        svg.hydrate(img, {
            class: "sim-neopixel-strip", x: l, y: t, width: w, height: h,
            href: svg.toDataUri(NEOPIXEL_PART_IMG)
        });
        return { el: img, x: l, y: t, w: w, h: h };
    }
    export class NeoPixel {
        public el: SVGElement;
        public cy: number;

        constructor(xy: Coord = [0, 0]) {
            let el = <SVGElement>svg.elt("rect");
            let r = PIXEL_RADIUS;
            let [cx, cy] = xy;
            let y = cy - r;
            svg.hydrate(el, { x: "-50%", y: y, width: "100%", height: r * 2, class: "sim-neopixel" });
            this.el = el;
            this.cy = cy;
        }

        public setRgb(rgb: [number, number, number]) {
            let hsl = visuals.rgbToHsl(rgb);
            let [h, s, l] = hsl;
            // at least 70% luminosity
            l = Math.max(l, 60);
            let fill = `hsl(${h}, ${s}%, ${l}%)`;
            this.el.setAttribute("fill", fill);
        }
    }

    export class NeoPixelCanvas {
        public canvas: SVGSVGElement;
        public pin: number;
        public pixels: NeoPixel[];
        private viewBox: [number, number, number, number];
        private background: SVGRectElement;

        constructor(pin: number) {
            this.pixels = [];
            this.pin = pin;
            let el = <SVGSVGElement>svg.elt("svg");
            svg.hydrate(el, {
                "class": `sim-neopixel-canvas`,
                "x": "0px",
                "y": "0px",
                "width": `${CANVAS_WIDTH}px`,
                "height": `${CANVAS_HEIGHT}px`,
            });
            this.canvas = el;
            this.background = <SVGRectElement>svg.child(el, "rect", { class: "sim-neopixel-background hidden" });
            this.updateViewBox(-CANVAS_VIEW_WIDTH / 2, 0, CANVAS_VIEW_WIDTH, CANVAS_VIEW_HEIGHT);
        }

        private updateViewBox(x: number, y: number, w: number, h: number) {
            this.viewBox = [x, y, w, h];
            svg.hydrate(this.canvas, { "viewBox": `${x} ${y} ${w} ${h}` });
            svg.hydrate(this.background, { "x": x, "y": y, "width": w, "height": h });
        }

        public update(colors: RGBW[]) {
            if (!colors || colors.length <= 0)
                return;

            for (let i = 0; i < colors.length; i++) {
                let pixel = this.pixels[i];
                if (!pixel) {
                    let cxy: Coord = [0, CANVAS_VIEW_PADDING + i * PIXEL_SPACING];
                    pixel = this.pixels[i] = new NeoPixel(cxy);
                    svg.hydrate(pixel.el, { title: `offset: ${i}` });
                    this.canvas.appendChild(pixel.el);
                }
                let color = colors[i];
                pixel.setRgb(color);
            }

            //show the canvas if it's hidden
            U.removeClass(this.background, "hidden");

            //resize if necessary
            let [first, last] = [this.pixels[0], this.pixels[this.pixels.length - 1]]
            let yDiff = last.cy - first.cy;
            let newH = yDiff + CANVAS_VIEW_PADDING * 2;
            let [oldX, oldY, oldW, oldH] = this.viewBox;
            if (oldH < newH) {
                let scalar = newH / oldH;
                let newW = oldW * scalar;
                this.updateViewBox(-newW / 2, oldY, newW, newH);
            }
        }

        public setLoc(xy: Coord) {
            let [x, y] = xy;
            svg.hydrate(this.canvas, { x: x, y: y });
        }
    };

    function digitalPinToPinNumber(gpioPin: string): number {
        const MICROBIT_ID_IO_P0 = 7; //TODO: don't hardcode this, import enums.d.ts
        if (gpioPin == "*") {
            return MICROBIT_ID_IO_P0;
        }
        let pinSplit = gpioPin.split("DigitalPin.P");
        U.assert(pinSplit.length === 2, "Unknown format for pin (for NeoPixel): " + gpioPin);
        let pinNumStr = pinSplit[1];
        let pinNum = Number(pinNumStr) + MICROBIT_ID_IO_P0;
        return pinNum
    }
    function parseNeoPixelMode(modeStr: string): NeoPixelMode {
        const modeMap: Map<NeoPixelMode> = {
            "NeoPixelMode.RGB": NeoPixelMode.RGB,
            "NeoPixelMode.RGBW": NeoPixelMode.RGBW
        };
        return modeMap[modeStr] || NeoPixelMode.RGB;
    }

    export class NeoPixelView implements IBoardPart<NeoPixelState> {
        public style: string = `
            .sim-neopixel-canvas {
            }
            .sim-neopixel-canvas-parent:hover {
                transform-origin: center;
                transform: scale(4) translateY(-60px);
                -moz-transform: scale(4) translateY(-220px);
            }
            .sim-neopixel-canvas .hidden {
                visibility:hidden;
            }
            .sim-neopixel-background {
                fill: rgba(255,255,255,0.9);
            }
            .sim-neopixel-strip {
            }
        `;
        public element: SVGElement;
        public overElement: SVGElement;
        public defs: SVGElement[];
        private state: NeoPixelState;
        private canvas: NeoPixelCanvas;
        private part: SVGElAndSize;
        private stripGroup: SVGGElement;
        private lastLocation: Coord;
        private pin: number;
        private mode: NeoPixelMode;

        public init(bus: EventBus, state: NeoPixelState, svgEl: SVGSVGElement, otherParams: Map<string>): void {
            U.assert(!!otherParams["mode"], "NeoPixels assumes a RGB vs RGBW mode is passed to it");
            U.assert(!!otherParams["pin"], "NeoPixels assumes a pin is passed to it");
            let modeStr = otherParams["mode"];
            this.mode = parseNeoPixelMode(modeStr);
            this.state = state;
            this.stripGroup = <SVGGElement>svg.elt("g");
            this.element = this.stripGroup;
            let pinStr = otherParams["pin"];
            this.pin = digitalPinToPinNumber(pinStr);
            this.lastLocation = [0, 0];
            let part = mkNeoPixelPart();
            this.part = part;
            this.stripGroup.appendChild(part.el);
            let canvas = new NeoPixelCanvas(this.pin);
            this.canvas = canvas;
            let canvasG = svg.elt("g", { class: "sim-neopixel-canvas-parent" });
            this.overElement = canvasG;
            canvasG.appendChild(canvas.canvas);
            this.updateStripLoc();
        }
        public moveToCoord(xy: Coord): void {
            let [x, y] = xy;
            let loc: Coord = [x, y];
            this.lastLocation = loc;
            this.updateStripLoc();
        }
        private updateStripLoc() {
            let [x, y] = this.lastLocation;
            U.assert(typeof x === "number" && typeof y === "number", "invalid x,y for NeoPixel strip");
            this.canvas.setLoc([x + CANVAS_LEFT, y + CANVAS_TOP]);
            svg.hydrate(this.part.el, { transform: `translate(${x} ${y})` }); //TODO: update part's l,h, etc.
        }
        public updateState(): void {
            let colors = this.state.getColors(this.pin, this.mode);
            this.canvas.update(colors);
        }
        public updateTheme(): void { }
    }
}