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58 lines
1.6 KiB
58 lines
1.6 KiB
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Identity = void 0;
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const util_1 = require("@antv/util");
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const base_1 = require("./base");
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const wilkinson_extended_1 = require("../tick-methods/wilkinson-extended");
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const utils_1 = require("../utils");
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class Identity extends base_1.Base {
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/**
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* 返回需要覆盖的默认选项
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* @returns 需要覆盖的默认选项
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*/
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getDefaultOptions() {
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return {
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domain: [0, 1],
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range: [0, 1],
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tickCount: 5,
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unknown: undefined,
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tickMethod: wilkinson_extended_1.wilkinsonExtended,
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};
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}
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/**
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* 输入和输出满足：y = x
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* @param x 输入值
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* @returns 输出值
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*/
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map(x) {
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return (0, utils_1.isValid)(x) ? x : this.options.unknown;
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}
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/**
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* map 的逆运算：x = y，在这里和 map 是相同方法
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* @param x 输出值
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* @returns 输入值
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*/
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invert(x) {
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return this.map(x);
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}
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/**
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* 克隆 Identity Scale
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* @returns 拥有相同选项且独立的 Identity Scale
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*/
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clone() {
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return new Identity(this.options);
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}
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/**
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* 根据比例尺的配置去生成 ticks，该 ticks 主要用于生成坐标轴
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* @returns 返回一个 ticks 的数组
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*/
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getTicks() {
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const { domain, tickCount, tickMethod } = this.options;
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const [min, max] = domain;
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if (!(0, util_1.isNumber)(min) || !(0, util_1.isNumber)(max))
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return [];
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return tickMethod(min, max, tickCount);
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}
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}
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exports.Identity = Identity;
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//# sourceMappingURL=identity.js.map
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