pie-lib/packages/plot/src/utils.js at develop · pie-framework/pie-lib · GitHub

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import invariant from 'invariant';

import { head, isEqual, range, tail } from 'lodash-es';

import Point from '@mapbox/point-geometry';

export const xy = (x, y) => ({ x, y });

export const buildSizeArray = (size, padding) => {

padding = Number.isFinite(padding) ? Math.max(padding, 0) : 0;

invariant(padding < size, 'padding must be less than size');

const half = Math.round(padding * 0.5);

return [half, size - half];

};

export const tickCount = (min, max, step) => {

invariant(min < max, 'min must be less than max');

const size = Math.abs(min - max);

return Math.round(size / step);

};

export function getInterval(domain, ticks) {

const { min, max } = domain;

const { major, minor } = ticks;

if (min >= max) {

throw new Error(`min is > max: ${min} > ${max}`);

}

const distance = max - min;

const minorTicks = minor > 0 ? minor + 1 : 1;

const normalizedMajor = major - 1;

if (isNaN(normalizedMajor)) {

throw new Error('Tick Frequency must be 2 or higher');

}

if (normalizedMajor <= 0) {

throw new Error('Tick Frequency must be 2 or higher');

}

const divider = normalizedMajor * minorTicks;

const raw = distance / divider;

return parseFloat(Number(raw).toFixed(4));

}

const mkRange = (min, max, interval) => {

const raw = range(min, max, interval);

/* Fix the last step due to rounding errors */

raw.splice(raw.length, 1, max);

return raw;

};

export function snapTo(min, max, interval, value) {

if (value >= max) {

return max;

}

if (value <= min) {

return min;

}

let rng = mkRange(min, max, interval);

rng = rng.filter((v) => {

return Math.abs(value - v) <= interval;

});

return (

rng.length &&

rng.reduce((prev, curr) => {

const currentDistance = Math.abs(curr - value);

const previousDistance = Math.abs(prev - value);

return currentDistance <= previousDistance ? curr : prev;

})

);

}

export function buildTickModel(domain, ticks, interval, scaleFn) {

const rng = mkRange(domain.min, domain.max, interval);

return rng.map((r, index) => {

const isMajor = index % (ticks.minor + 1) === 0;

return {

value: r,

major: isMajor,

x: scaleFn(r),

};

});

}

export const polygonToArea = (points) => {

const h = head(points);

const area = {

left: h.x,

top: h.y,

bottom: h.y,

right: h.x,

};

return tail(points).reduce((a, p) => {

a.left = Math.min(a.left, p.x);

a.top = Math.max(a.top, p.y);

a.bottom = Math.min(a.bottom, p.y);

a.right = Math.max(a.right, p.x);

return a;

}, area);

};

export const lineToArea = (from, to) => {

const left = Math.min(from.x, to.x);

const top = Math.max(from.y, to.y);

const bottom = Math.min(from.y, to.y);

const right = Math.max(from.x, to.x);

return { left, top, bottom, right };

};

export const bounds = (area, domain, range) => {

return {

left: domain.min - area.left,

right: Math.abs(area.right - domain.max),

top: Math.abs(area.top - range.max),

bottom: range.min - area.bottom,

};

export const point = (o) => new Point(o.x, o.y);

export const getDelta = (from, to) => {

return point(to).sub(point(from));

};

export const bandKey = (d, index) => `${index}-${d.label || '-'}`;

export const isDomainRangeEqual = (graphProps, nextGraphProps) => {

return isEqual(graphProps.domain, nextGraphProps.domain) && isEqual(graphProps.range, nextGraphProps.range);

};

// findLongestWord is also used in graphing

export const findLongestWord = (label) => {

let longestWord = (label || '')

.replace(/<[^>]+>/g, '')

.split(' ')

.sort((a, b) => b.length - a.length);

return longestWord[0].length;

};

// amountToIncreaseWidth is also used in graphing

export const amountToIncreaseWidth = (longestWord) => {

if (!longestWord) {

return 0;

}

return longestWord * 20;

};

export const extractTextFromHTML = (htmlString) => {

const parser = new DOMParser();

const doc = parser?.parseFromString(htmlString, 'text/html');

return doc?.body?.textContent || '';

};

export const isEmptyObject = (obj) => {

return obj && Object.keys(obj).length === 0 && obj.constructor === Object;

};

export const isEmptyString = (str) => {

return typeof str === 'string' && str.trim() === '';

};

pie-lib/packages/plot/src/utils.js at develop · pie-framework/pie-lib · GitHub

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