435 lines
13 KiB
Vue
435 lines
13 KiB
Vue
<template>
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<view class="ec-wrap">
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<!-- 通过 props 把 option 喂给 renderjs -->
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<view
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class="ec-canvas"
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:prop="option"
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:change:prop="ec.setOption"
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:data-theme="theme"
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/>
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</view>
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</template>
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<script>
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export default {
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name: "EChartsView",
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props: {
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option: { type: Object, default: () => ({}) },
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theme: { type: String, default: "light" },
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},
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};
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</script>
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<script module="ec" lang="renderjs">
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import * as echarts from "echarts";
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// 使用 Map 存储多个图表实例（支持多个 EChartsView 组件）
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const charts = new Map();
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const resizeObservers = new Map();
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// 地图数据加载状态
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let chinaMapLoaded = false;
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let chinaMapLoading = false;
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// 加载并注册中国地图
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async function loadChinaMap() {
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if (chinaMapLoaded) {
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return Promise.resolve();
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}
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if (chinaMapLoading) {
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// 如果正在加载，等待加载完成
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return new Promise((resolve) => {
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const checkInterval = setInterval(() => {
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if (chinaMapLoaded) {
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clearInterval(checkInterval);
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resolve();
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}
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}, 100);
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// 最多等待 10 秒
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setTimeout(() => {
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clearInterval(checkInterval);
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resolve();
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}, 10000);
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});
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}
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chinaMapLoading = true;
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try {
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// 从在线 CDN 加载中国地图 GeoJSON 数据
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// 使用 ECharts 官方示例数据源
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const response = await fetch('https://geo.datav.aliyun.com/areas_v3/bound/100000_full.json');
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if (!response.ok) {
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// 如果第一个源失败，尝试备用源
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const backupResponse = await fetch('https://echarts.apache.org/examples/data/map/china.json');
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if (!backupResponse.ok) {
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throw new Error('Failed to load China map data');
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}
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const geoJson = await backupResponse.json();
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echarts.registerMap('china', geoJson);
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} else {
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const geoJson = await response.json();
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echarts.registerMap('china', geoJson);
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}
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chinaMapLoaded = true;
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console.log('[EChartsView] 中国地图数据已加载并注册');
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} catch (error) {
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console.error('[EChartsView] 加载中国地图数据失败:', error);
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// 即使加载失败，也标记为已尝试，避免重复请求
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chinaMapLoaded = false;
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} finally {
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chinaMapLoading = false;
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}
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}
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function getChartKey(el) {
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// 使用元素的唯一标识作为 key
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if (!el._echartsKey) {
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el._echartsKey = 'echarts_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9);
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}
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return el._echartsKey;
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}
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function ensureChart(el, retryCount = 0) {
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if (!el) return null;
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const key = getChartKey(el);
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let chart = charts.get(key);
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// 如果图表已存在且有效，直接返回
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if (chart && !chart.isDisposed()) {
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return chart;
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}
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// 如果图表已销毁，从 Map 中移除
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if (chart && chart.isDisposed()) {
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charts.delete(key);
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const ro = resizeObservers.get(key);
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if (ro) {
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ro.disconnect();
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resizeObservers.delete(key);
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}
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chart = null;
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}
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// 确保元素有尺寸
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const rect = el.getBoundingClientRect();
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const computedStyle = window.getComputedStyle(el);
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const width = parseFloat(computedStyle.width) || rect.width;
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const height = parseFloat(computedStyle.height) || rect.height;
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// 如果尺寸为 0，尝试延迟初始化（最多重试 10 次）
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if ((width === 0 || height === 0) && retryCount < 10) {
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if (retryCount === 0) {
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console.warn('[EChartsView] 容器尺寸为 0，延迟初始化', { width, height, rect });
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}
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// 使用指数退避策略，避免无限循环
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const delay = Math.min(100 * Math.pow(1.5, retryCount), 1000);
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setTimeout(() => {
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ensureChart(el, retryCount + 1);
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}, delay);
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return null;
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}
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// 如果重试次数过多，使用默认尺寸
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if (width === 0 || height === 0) {
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console.warn('[EChartsView] 容器尺寸仍为 0，使用默认尺寸', { width, height });
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// 使用父元素尺寸或默认值
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const parentRect = el.parentElement ? el.parentElement.getBoundingClientRect() : { width: 800, height: 400 };
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const finalWidth = width || parentRect.width || 800;
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const finalHeight = height || parentRect.height || 400;
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if (finalWidth > 0 && finalHeight > 0) {
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// 设置元素尺寸
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el.style.width = finalWidth + 'px';
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el.style.height = finalHeight + 'px';
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} else {
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console.error('[EChartsView] 无法确定容器尺寸，跳过初始化');
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return null;
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}
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}
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try {
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// 注意：地图数据加载在 setOption 中处理，这里不处理
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// 因为 ensureChart 是同步函数，不能使用 await
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chart = echarts.init(el, null, {
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renderer: "canvas",
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width: rect.width,
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height: rect.height
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});
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charts.set(key, chart);
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// 自适应：监听容器尺寸变化
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if (typeof ResizeObserver !== "undefined") {
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const ro = new ResizeObserver((entries) => {
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for (const entry of entries) {
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const { width, height } = entry.contentRect;
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const c = charts.get(key);
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if (c && !c.isDisposed() && width > 0 && height > 0) {
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try {
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c.resize({ width, height });
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} catch (e) {
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console.warn('[EChartsView] resize 失败', e);
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}
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}
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}
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});
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ro.observe(el);
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resizeObservers.set(key, ro);
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} else {
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// 兜底
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const resizeHandler = () => {
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const c = charts.get(key);
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if (c && !c.isDisposed()) {
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const rect = el.getBoundingClientRect();
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if (rect.width > 0 && rect.height > 0) {
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try {
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c.resize();
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} catch (e) {
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console.warn('[EChartsView] resize 失败', e);
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}
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}
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}
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};
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window.addEventListener("resize", resizeHandler);
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// 存储 handler 以便后续清理
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el._resizeHandler = resizeHandler;
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}
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return chart;
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} catch (e) {
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console.error('[EChartsView] 初始化失败', e);
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return null;
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}
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}
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function disposeChart(el) {
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if (!el) return;
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const key = getChartKey(el);
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const chart = charts.get(key);
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if (chart && !chart.isDisposed()) {
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try {
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chart.dispose();
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} catch (e) {
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console.warn('[EChartsView] dispose 失败', e);
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}
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}
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charts.delete(key);
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const ro = resizeObservers.get(key);
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if (ro) {
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ro.disconnect();
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resizeObservers.delete(key);
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}
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if (el._resizeHandler) {
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window.removeEventListener("resize", el._resizeHandler);
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delete el._resizeHandler;
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}
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}
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export default {
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mounted() {
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const el = this.$el.querySelector(".ec-canvas") || this.$el;
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if (!el) {
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console.error('[EChartsView] 找不到容器元素');
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return;
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}
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// 延迟初始化，确保 DOM 已渲染
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setTimeout(() => {
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ensureChart(el);
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}, 50);
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},
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beforeDestroy() {
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const el = this.$el.querySelector(".ec-canvas") || this.$el;
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if (el) {
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disposeChart(el);
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}
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},
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methods: {
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async setOption(option, oldOption) {
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const el = this.$el.querySelector(".ec-canvas") || this.$el;
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if (!el) {
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console.error('[EChartsView] setOption: 找不到容器元素');
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return;
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}
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// 检查 option 是否有效
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if (!option || typeof option !== 'object') {
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console.warn('[EChartsView] setOption: option 无效', option);
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return;
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}
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// 检查是否使用了地图，如果是，先加载地图数据
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const needsMap = option.geo || (option.series && Array.isArray(option.series) && option.series.some(s => s.type === 'map' && s.map === 'china'));
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if (needsMap) {
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await loadChinaMap();
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}
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// 保存 option 供 ensureChart 使用
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el._pendingOption = option;
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// 确保图表已初始化
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let c = ensureChart(el);
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if (!c) {
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// 如果容器尺寸为 0，使用 ResizeObserver 等待容器尺寸可用
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if (typeof ResizeObserver !== "undefined") {
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let roTimeout = null;
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const ro = new ResizeObserver(async (entries) => {
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for (const entry of entries) {
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const { width, height } = entry.contentRect;
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if (width > 0 && height > 0) {
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ro.disconnect();
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if (roTimeout) clearTimeout(roTimeout);
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c = ensureChart(el);
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if (c && !c.isDisposed()) {
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try {
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// 如果使用地图，确保地图已加载
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if (needsMap) {
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await loadChinaMap();
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}
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const plainOption = JSON.parse(JSON.stringify(option));
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c.setOption(plainOption, true);
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requestAnimationFrame(() => {
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const c2 = charts.get(getChartKey(el));
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if (c2 && !c2.isDisposed()) {
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try {
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c2.resize({ width, height });
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} catch (e) {
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// 忽略已销毁的错误
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}
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}
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});
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} catch (e) {
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console.error('[EChartsView] setOption 失败', e);
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}
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}
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break;
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}
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}
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});
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ro.observe(el);
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// 设置超时，避免无限等待（5秒后强制使用默认尺寸）
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roTimeout = setTimeout(() => {
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ro.disconnect();
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console.warn('[EChartsView] ResizeObserver 超时，尝试使用默认尺寸初始化');
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// 尝试使用父元素尺寸或默认值
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const parentRect = el.parentElement ? el.parentElement.getBoundingClientRect() : null;
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const defaultWidth = parentRect ? parentRect.width : 800;
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const defaultHeight = parentRect ? parentRect.height : 400;
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if (defaultWidth > 0 && defaultHeight > 0) {
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el.style.width = defaultWidth + 'px';
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el.style.height = defaultHeight + 'px';
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c = ensureChart(el);
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if (c && !c.isDisposed()) {
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try {
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const plainOption = JSON.parse(JSON.stringify(option));
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c.setOption(plainOption, true);
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} catch (e) {
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console.error('[EChartsView] setOption 失败', e);
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}
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}
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}
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}, 5000);
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} else {
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// 兜底：延迟重试（最多3次）
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let retryCount = 0;
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const maxRetries = 3;
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const retry = () => {
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if (retryCount >= maxRetries) {
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console.warn('[EChartsView] 重试次数过多，跳过初始化');
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return;
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}
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retryCount++;
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setTimeout(async () => {
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if (needsMap) {
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await loadChinaMap();
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}
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c = ensureChart(el);
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if (c && !c.isDisposed()) {
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try {
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const plainOption = JSON.parse(JSON.stringify(option));
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c.setOption(plainOption, true);
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} catch (e) {
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console.error('[EChartsView] setOption 失败', e);
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}
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} else if (retryCount < maxRetries) {
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retry();
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}
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}, 200 * retryCount);
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};
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retry();
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}
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return;
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}
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// 检查图表是否已销毁
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if (c.isDisposed()) {
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console.warn('[EChartsView] setOption: 图表已销毁，重新初始化');
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charts.delete(getChartKey(el));
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if (needsMap) {
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await loadChinaMap();
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}
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c = ensureChart(el);
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if (!c) return;
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}
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try {
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// 如果使用地图，确保地图已加载
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if (needsMap) {
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await loadChinaMap();
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}
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// 深拷贝 option 确保是纯 JS 对象
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const plainOption = JSON.parse(JSON.stringify(option));
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c.setOption(plainOption, true);
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// 使用 requestAnimationFrame 避免 resize 警告
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requestAnimationFrame(() => {
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const key = getChartKey(el);
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const c2 = charts.get(key);
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if (c2 && !c2.isDisposed()) {
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const rect = el.getBoundingClientRect();
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if (rect.width > 0 && rect.height > 0) {
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try {
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c2.resize({ width: rect.width, height: rect.height });
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} catch (e) {
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// 忽略已销毁的错误（可能组件已卸载）
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}
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}
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}
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});
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} catch (e) {
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console.error('[EChartsView] setOption 失败', e, option);
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}
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},
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},
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};
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</script>
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<style>
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.ec-wrap {
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position: relative !important;
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width: 100%;
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height: 100%;
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overflow: hidden; /* 防止 canvas 越界 */
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}
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.ec-canvas {
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position: absolute !important;
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left: 0;
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right: 0;
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top: 0;
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bottom: 0;
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width: 100% !important;
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height: 100% !important;
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display: block;
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}
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</style>
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