tsparticles/dist/browser/Utils/EventListeners.js

Easily create highly customizable particle animations and use them as animated backgrounds for your website. Ready to use components available also for React, Vue.js (2.x and 3.x), Angular, Svelte, jQuery, Preact, Riot.js, Inferno.

import { ClickMode, InteractivityDetect } from "../Enums";
import { Constants } from "./Constants";
function manageListener(element, event, handler, add, options) {
    if (add) {
        let addOptions = { passive: true };
        if (typeof options === "boolean") {
            addOptions.capture = options;
        }
        else if (options !== undefined) {
            addOptions = options;
        }
        element.addEventListener(event, handler, addOptions);
    }
    else {
        const removeOptions = options;
        element.removeEventListener(event, handler, removeOptions);
    }
}
export class EventListeners {
    constructor(container) {
        this.container = container;
        this.canPush = true;
        this.mouseMoveHandler = (e) => this.mouseTouchMove(e);
        this.touchStartHandler = (e) => this.mouseTouchMove(e);
        this.touchMoveHandler = (e) => this.mouseTouchMove(e);
        this.touchEndHandler = () => this.mouseTouchFinish();
        this.mouseLeaveHandler = () => this.mouseTouchFinish();
        this.touchCancelHandler = () => this.mouseTouchFinish();
        this.touchEndClickHandler = (e) => this.mouseTouchClick(e);
        this.mouseUpHandler = (e) => this.mouseTouchClick(e);
        this.mouseDownHandler = () => this.mouseDown();
        this.visibilityChangeHandler = () => this.handleVisibilityChange();
        this.resizeHandler = () => this.handleWindowResize();
    }
    addListeners() {
        this.manageListeners(true);
    }
    removeListeners() {
        this.manageListeners(false);
    }
    manageListeners(add) {
        var _a;
        const container = this.container;
        const options = container.actualOptions;
        const detectType = options.interactivity.detectsOn;
        let mouseLeaveEvent = Constants.mouseLeaveEvent;
        if (detectType === InteractivityDetect.window) {
            container.interactivity.element = window;
            mouseLeaveEvent = Constants.mouseOutEvent;
        }
        else if (detectType === InteractivityDetect.parent && container.canvas.element) {
            const canvasEl = container.canvas.element;
            container.interactivity.element = (_a = canvasEl.parentElement) !== null && _a !== void 0 ? _a : canvasEl.parentNode;
        }
        else {
            container.interactivity.element = container.canvas.element;
        }
        const interactivityEl = container.interactivity.element;
        if (!interactivityEl) {
            return;
        }
        const html = interactivityEl;
        if (options.interactivity.events.onHover.enable || options.interactivity.events.onClick.enable) {
            manageListener(interactivityEl, Constants.mouseMoveEvent, this.mouseMoveHandler, add);
            manageListener(interactivityEl, Constants.touchStartEvent, this.touchStartHandler, add);
            manageListener(interactivityEl, Constants.touchMoveEvent, this.touchMoveHandler, add);
            if (!options.interactivity.events.onClick.enable) {
                manageListener(interactivityEl, Constants.touchEndEvent, this.touchEndHandler, add);
            }
            else {
                manageListener(interactivityEl, Constants.touchEndEvent, this.touchEndClickHandler, add);
                manageListener(interactivityEl, Constants.mouseUpEvent, this.mouseUpHandler, add);
                manageListener(interactivityEl, Constants.mouseDownEvent, this.mouseDownHandler, add);
            }
            manageListener(interactivityEl, mouseLeaveEvent, this.mouseLeaveHandler, add);
            manageListener(interactivityEl, Constants.touchCancelEvent, this.touchCancelHandler, add);
        }
        if (container.canvas.element) {
            container.canvas.element.style.pointerEvents = html === container.canvas.element ? "initial" : "none";
        }
        if (options.interactivity.events.resize) {
            manageListener(window, Constants.resizeEvent, this.resizeHandler, add);
        }
        if (document) {
            manageListener(document, Constants.visibilityChangeEvent, this.visibilityChangeHandler, add, false);
        }
    }
    handleWindowResize() {
        var _a;
        (_a = this.container.canvas) === null || _a === void 0 ? void 0 : _a.windowResize();
    }
    handleVisibilityChange() {
        const container = this.container;
        const options = container.actualOptions;
        this.mouseTouchFinish();
        if (!options.pauseOnBlur) {
            return;
        }
        if (document === null || document === void 0 ? void 0 : document.hidden) {
            container.pageHidden = true;
            container.pause();
        }
        else {
            container.pageHidden = false;
            if (container.getAnimationStatus()) {
                container.play(true);
            }
            else {
                container.draw();
            }
        }
    }
    mouseDown() {
        const interactivity = this.container.interactivity;
        if (interactivity) {
            const mouse = interactivity.mouse;
            mouse.clicking = true;
            mouse.downPosition = mouse.position;
        }
    }
    mouseTouchMove(e) {
        var _a, _b, _c, _d, _e, _f, _g;
        const container = this.container;
        const options = container.actualOptions;
        if (((_a = container.interactivity) === null || _a === void 0 ? void 0 : _a.element) === undefined) {
            return;
        }
        container.interactivity.mouse.inside = true;
        let pos;
        const canvas = container.canvas.element;
        if (e.type.startsWith("mouse")) {
            this.canPush = true;
            const mouseEvent = e;
            if (container.interactivity.element === window) {
                if (canvas) {
                    const clientRect = canvas.getBoundingClientRect();
                    pos = {
                        x: mouseEvent.clientX - clientRect.left,
                        y: mouseEvent.clientY - clientRect.top,
                    };
                }
            }
            else if (options.interactivity.detectsOn === InteractivityDetect.parent) {
                const source = mouseEvent.target;
                const target = mouseEvent.currentTarget;
                const canvasEl = container.canvas.element;
                if (source && target && canvasEl) {
                    const sourceRect = source.getBoundingClientRect();
                    const targetRect = target.getBoundingClientRect();
                    const canvasRect = canvasEl.getBoundingClientRect();
                    pos = {
                        x: mouseEvent.offsetX + 2 * sourceRect.left - (targetRect.left + canvasRect.left),
                        y: mouseEvent.offsetY + 2 * sourceRect.top - (targetRect.top + canvasRect.top),
                    };
                }
                else {
                    pos = {
                        x: (_b = mouseEvent.offsetX) !== null && _b !== void 0 ? _b : mouseEvent.clientX,
                        y: (_c = mouseEvent.offsetY) !== null && _c !== void 0 ? _c : mouseEvent.clientY,
                    };
                }
            }
            else {
                if (mouseEvent.target === container.canvas.element) {
                    pos = {
                        x: (_d = mouseEvent.offsetX) !== null && _d !== void 0 ? _d : mouseEvent.clientX,
                        y: (_e = mouseEvent.offsetY) !== null && _e !== void 0 ? _e : mouseEvent.clientY,
                    };
                }
            }
        }
        else {
            this.canPush = e.type !== "touchmove";
            const touchEvent = e;
            const lastTouch = touchEvent.touches[touchEvent.touches.length - 1];
            const canvasRect = canvas === null || canvas === void 0 ? void 0 : canvas.getBoundingClientRect();
            pos = {
                x: lastTouch.clientX - ((_f = canvasRect === null || canvasRect === void 0 ? void 0 : canvasRect.left) !== null && _f !== void 0 ? _f : 0),
                y: lastTouch.clientY - ((_g = canvasRect === null || canvasRect === void 0 ? void 0 : canvasRect.top) !== null && _g !== void 0 ? _g : 0),
            };
        }
        const pxRatio = container.retina.pixelRatio;
        if (pos) {
            pos.x *= pxRatio;
            pos.y *= pxRatio;
        }
        container.interactivity.mouse.position = pos;
        container.interactivity.status = Constants.mouseMoveEvent;
    }
    mouseTouchFinish() {
        const interactivity = this.container.interactivity;
        if (interactivity === undefined) {
            return;
        }
        const mouse = interactivity.mouse;
        delete mouse.position;
        delete mouse.clickPosition;
        delete mouse.downPosition;
        interactivity.status = Constants.mouseLeaveEvent;
        mouse.inside = false;
        mouse.clicking = false;
    }
    mouseTouchClick(e) {
        const container = this.container;
        const options = container.actualOptions;
        const mouse = container.interactivity.mouse;
        mouse.inside = true;
        let handled = false;
        const mousePosition = mouse.position;
        if (mousePosition === undefined || !options.interactivity.events.onClick.enable) {
            return;
        }
        for (const [, plugin] of container.plugins) {
            if (plugin.clickPositionValid !== undefined) {
                handled = plugin.clickPositionValid(mousePosition);
                if (handled) {
                    break;
                }
            }
        }
        if (!handled) {
            this.doMouseTouchClick(e);
        }
        mouse.clicking = false;
    }
    doMouseTouchClick(e) {
        const container = this.container;
        const options = container.actualOptions;
        if (this.canPush) {
            const mousePos = container.interactivity.mouse.position;
            if (mousePos) {
                container.interactivity.mouse.clickPosition = {
                    x: mousePos.x,
                    y: mousePos.y,
                };
            }
            else {
                return;
            }
            container.interactivity.mouse.clickTime = new Date().getTime();
            const onClick = options.interactivity.events.onClick;
            if (onClick.mode instanceof Array) {
                for (const mode of onClick.mode) {
                    this.handleClickMode(mode);
                }
            }
            else {
                this.handleClickMode(onClick.mode);
            }
        }
        if (e.type === "touchend") {
            setTimeout(() => this.mouseTouchFinish(), 500);
        }
    }
    handleClickMode(mode) {
        const container = this.container;
        const options = container.actualOptions;
        const pushNb = options.interactivity.modes.push.quantity;
        const removeNb = options.interactivity.modes.remove.quantity;
        switch (mode) {
            case ClickMode.push: {
                if (pushNb > 0) {
                    container.particles.push(pushNb, container.interactivity.mouse);
                }
                break;
            }
            case ClickMode.remove:
                container.particles.removeQuantity(removeNb);
                break;
            case ClickMode.bubble:
                container.bubble.clicking = true;
                break;
            case ClickMode.repulse:
                container.repulse.clicking = true;
                container.repulse.count = 0;
                for (const particle of container.repulse.particles) {
                    particle.velocity.setTo(particle.initialVelocity);
                }
                container.repulse.particles = [];
                container.repulse.finish = false;
                setTimeout(() => {
                    if (!container.destroyed) {
                        container.repulse.clicking = false;
                    }
                }, options.interactivity.modes.repulse.duration * 1000);
                break;
            case ClickMode.attract:
                container.attract.clicking = true;
                container.attract.count = 0;
                for (const particle of container.attract.particles) {
                    particle.velocity.setTo(particle.initialVelocity);
                }
                container.attract.particles = [];
                container.attract.finish = false;
                setTimeout(() => {
                    if (!container.destroyed) {
                        container.attract.clicking = false;
                    }
                }, options.interactivity.modes.attract.duration * 1000);
                break;
            case ClickMode.pause:
                if (container.getAnimationStatus()) {
                    container.pause();
                }
                else {
                    container.play();
                }
                break;
        }
        for (const [, plugin] of container.plugins) {
            if (plugin.handleClickMode) {
                plugin.handleClickMode(mode);
            }
        }
    }
}