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124 lines
3.8 KiB
124 lines
3.8 KiB
// @flow
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import assert from 'assert';
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import Color from '../util/color.js';
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import Collator from './types/collator.js';
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import Formatted from './types/formatted.js';
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import ResolvedImage from './types/resolved_image.js';
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import {NullType, NumberType, StringType, BooleanType, ColorType, ObjectType, ValueType, CollatorType, FormattedType, ResolvedImageType, array} from './types.js';
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import type {Type} from './types.js';
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export function validateRGBA(r: mixed, g: mixed, b: mixed, a?: mixed): string | null {
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if (!(
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typeof r === 'number' && r >= 0 && r <= 255 &&
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typeof g === 'number' && g >= 0 && g <= 255 &&
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typeof b === 'number' && b >= 0 && b <= 255
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)) {
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const value = typeof a === 'number' ? [r, g, b, a] : [r, g, b];
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return `Invalid rgba value [${value.join(', ')}]: 'r', 'g', and 'b' must be between 0 and 255.`;
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}
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if (!(
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typeof a === 'undefined' || (typeof a === 'number' && a >= 0 && a <= 1)
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)) {
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return `Invalid rgba value [${[r, g, b, a].join(', ')}]: 'a' must be between 0 and 1.`;
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}
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return null;
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}
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export type Value = null | string | boolean | number | Color | Collator | Formatted | ResolvedImage | $ReadOnlyArray<Value> | { +[string]: Value }
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export function isValue(mixed: mixed): boolean {
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if (mixed === null) {
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return true;
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} else if (typeof mixed === 'string') {
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return true;
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} else if (typeof mixed === 'boolean') {
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return true;
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} else if (typeof mixed === 'number') {
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return true;
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} else if (mixed instanceof Color) {
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return true;
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} else if (mixed instanceof Collator) {
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return true;
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} else if (mixed instanceof Formatted) {
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return true;
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} else if (mixed instanceof ResolvedImage) {
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return true;
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} else if (Array.isArray(mixed)) {
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for (const item of mixed) {
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if (!isValue(item)) {
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return false;
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}
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}
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return true;
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} else if (typeof mixed === 'object') {
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for (const key in mixed) {
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if (!isValue(mixed[key])) {
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return false;
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}
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}
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return true;
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} else {
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return false;
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}
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}
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export function typeOf(value: Value): Type {
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if (value === null) {
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return NullType;
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} else if (typeof value === 'string') {
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return StringType;
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} else if (typeof value === 'boolean') {
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return BooleanType;
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} else if (typeof value === 'number') {
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return NumberType;
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} else if (value instanceof Color) {
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return ColorType;
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} else if (value instanceof Collator) {
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return CollatorType;
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} else if (value instanceof Formatted) {
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return FormattedType;
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} else if (value instanceof ResolvedImage) {
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return ResolvedImageType;
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} else if (Array.isArray(value)) {
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const length = value.length;
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let itemType: Type | typeof undefined;
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for (const item of value) {
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const t = typeOf(item);
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if (!itemType) {
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itemType = t;
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} else if (itemType === t) {
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continue;
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} else {
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itemType = ValueType;
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break;
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}
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}
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return array(itemType || ValueType, length);
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} else {
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assert(typeof value === 'object');
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return ObjectType;
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}
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}
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export function toString(value: Value): string {
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const type = typeof value;
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if (value === null) {
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return '';
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} else if (type === 'string' || type === 'number' || type === 'boolean') {
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return String(value);
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} else if (value instanceof Color || value instanceof Formatted || value instanceof ResolvedImage) {
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return value.toString();
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} else {
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return JSON.stringify(value);
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}
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}
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export {Color, Collator};
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