modules/TwoComplement.js

import CircuitElement from "../circuitElement";
import Node, { findNode } from "../node";
import simulationArea from "../simulationArea";
import { correctWidth, fillText, drawCircle2 } from "../canvasApi";
import { changeInputSize } from "../modules";
/**
 * @class
 * TwoComplement
 * @extends CircuitElement
 * @param {number} x - x coordinate of element.
 * @param {number} y - y coordinate of element.
 * @param {Scope=} scope - Cirucit on which element is drawn
 * @param {string=} dir - direction of element
 * @param {number=} bitWidth - bit width per node.
 * @category modules
 */
import { colors } from "../themer/themer";

export default class TwoComplement extends CircuitElement {
    constructor(x, y, scope = globalScope, dir = "RIGHT", bitWidth = 1) {
        super(x, y, scope, dir, bitWidth);
        /* this is done in this.baseSetup() now
        this.scope['TwoComplement'].push(this);
        */
        this.rectangleObject = false;
        this.setDimensions(15, 15);
        this.inp1 = new Node(-10, 0, 0, this, this.bitWidth, "input stream");
        this.output1 = new Node(
            20,
            0,
            1,
            this,
            this.bitWidth,
            "2's complement"
        );
    }

    /**
     * @memberof TwoComplement
     * fn to create save Json Data of object
     * @return {JSON}
     */
    customSave() {
        const data = {
            constructorParamaters: [this.direction, this.bitWidth],
            nodes: {
                output1: findNode(this.output1),
                inp1: findNode(this.inp1),
            },
        };
        return data;
    }

    /**
     * @memberof TwoComplement
     * resolve output values based on inputData
     */
    resolve() {
        if (this.isResolvable() === false) {
            return;
        }
        let output =
            ((~this.inp1.value >>> 0) << (32 - this.bitWidth)) >>>
            (32 - this.bitWidth);
        output += 1;
        this.output1.value =
            (output << (32 - this.bitWidth)) >>> (32 - this.bitWidth);
        simulationArea.simulationQueue.add(this.output1);

        this.setOutputsUpstream(true);
    }

    /**
     * @memberof TwoComplement
     * function to draw element
     */
    customDraw() {
        var ctx = simulationArea.context;
        ctx.strokeStyle = colors["stroke"];
        ctx.lineWidth = correctWidth(3);
        const xx = this.x;
        const yy = this.y;
        ctx.beginPath();
        ctx.fillStyle = "black";
        fillText(ctx, "2'", xx, yy, 10);
        if (
            (this.hover && !simulationArea.shiftDown) ||
            simulationArea.lastSelected === this ||
            simulationArea.multipleObjectSelections.contains(this)
        )
            ctx.fillStyle = colors["hover_select"];
        ctx.fill();
        ctx.beginPath();
        drawCircle2(ctx, 5, 0, 15, xx, yy, this.direction);
        ctx.stroke();
    }

    generateVerilog() {
        return `assign ${this.output1.verilogLabel} = ~${this.inp1.verilogLabel} + 1;`;
    }
}

/**
 * @memberof TwoComplement
 * Help Tip
 * @type {string}
 * @category modules
 */
TwoComplement.prototype.tooltipText =
    "Two's Complement Tooltip : Calculates the two's complement";
TwoComplement.prototype.objectType = "TwoComplement";