@tsparticles/shape-text/tsparticles.shape.text.js

tsParticles text shape

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/* Shape v4.1.0 */
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@tsparticles/engine'), require('@tsparticles/canvas-utils')) :
    typeof define === 'function' && define.amd ? define(['exports', '@tsparticles/engine', '@tsparticles/canvas-utils'], factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory((global.__tsParticlesInternals = global.__tsParticlesInternals || {}, global.__tsParticlesInternals.shapes = global.__tsParticlesInternals.shapes || {}, global.__tsParticlesInternals.shapes.text = global.__tsParticlesInternals.shapes.text || {}), global.__tsParticlesInternals.engine, global.__tsParticlesInternals.canvas.utils));
})(this, (function (exports, engine, canvasUtils) { 'use strict';

    const validTypes = ["text", "character", "char", "multiline-text"];
    const firstIndex$1 = 0, minLength$1 = 0;
    function drawText(data) {
        const { context, particle, fill, stroke, radius, opacity } = data, character = particle.shapeData;
        if (!character) {
            return;
        }
        const textData = character.value;
        particle.textLines ??= engine.itemFromSingleOrMultiple(textData, particle.randomIndexData)?.split("\n") ?? [];
        particle.maxTextLength ??= particle.textLines.length
            ? Math.max(...particle.textLines.map(t => t.length))
            : (particle.textLines[firstIndex$1]?.length ?? minLength$1);
        if (!particle.textLines.length || !particle.maxTextLength) {
            return;
        }
        const lines = particle.textLines, style = character.style ?? "", weight = character.weight ?? "400", font = character.font ?? "Verdana", size = (Math.round(radius) * engine.double) / (lines.length * particle.maxTextLength);
        context.font = `${style} ${weight} ${size.toString()}px "${font}"`;
        const originalGlobalAlpha = context.globalAlpha;
        context.globalAlpha = opacity;
        for (let i = 0; i < lines.length; i++) {
            const currentLine = lines[i];
            if (!currentLine) {
                continue;
            }
            drawTextLine(context, currentLine, size, i, fill, stroke);
        }
        context.globalAlpha = originalGlobalAlpha;
    }
    function drawTextLine(context, line, size, index, fill, stroke) {
        const pos = {
            x: -(line.length * size * engine.half),
            y: size * engine.half + index * size,
        };
        if (fill) {
            context.fillText(line, pos.x, pos.y);
        }
        if (stroke) {
            context.strokeText(line, pos.x, pos.y);
        }
    }

    const firstIndex = 0, minLength = 0;
    class TextDrawer {
        draw(data) {
            drawText(data);
        }
        async init(container) {
            const options = container.actualOptions;
            if (validTypes.find(t => engine.isInArray(t, options.particles.shape.type))) {
                const shapeOptions = validTypes
                    .map(t => options.particles.shape.options[t])
                    .find(t => !!t), promises = [];
                engine.executeOnSingleOrMultiple(shapeOptions, shape => {
                    promises.push(canvasUtils.loadFont(shape.font, shape.weight));
                });
                await Promise.all(promises);
            }
        }
        particleInit(_container, particle) {
            if (!particle.shape || !validTypes.includes(particle.shape)) {
                return;
            }
            const character = particle.shapeData;
            if (character === undefined) {
                return;
            }
            const textData = character.value;
            if (!textData) {
                return;
            }
            particle.textLines = engine.itemFromSingleOrMultiple(textData, particle.randomIndexData)?.split("\n") ?? [];
            particle.maxTextLength = particle.textLines.length
                ? Math.max(...particle.textLines.map(t => t.length))
                : (particle.textLines[firstIndex]?.length ?? minLength);
        }
    }

    async function loadTextShape(engine) {
        engine.checkVersion("4.1.0");
        await engine.pluginManager.register(e => {
            e.pluginManager.addShape(validTypes, () => Promise.resolve(new TextDrawer()));
        });
    }

    const globalObject = globalThis;
    globalObject.__tsParticlesInternals = globalObject.__tsParticlesInternals ?? {};
    globalObject.loadTextShape = loadTextShape;

    exports.loadTextShape = loadTextShape;

}));
Object.assign(globalThis.window || globalThis, { loadTextShape: (globalThis.__tsParticlesInternals.shapes.text || {}).loadTextShape });
delete (globalThis.window || globalThis).tsparticlesInternalExports;