l-echart.uvue

<template>
	<!-- #ifdef APP -->
	<web-view class="lime-echart" ref="chartRef" @load="loaded" :style="[customStyle]" :webview-styles="[webviewStyles]"
		src="/uni_modules/lime-echart/static/uvue.html?v=10112">
	</web-view>
	<!-- #endif -->
	<!-- #ifdef H5 -->
	<div class="lime-echart" ref="chartRef"></div>
	<!-- #endif -->
	<!-- #ifndef H5 || APP-->
	<view  class="lime-echart">
		<canvas style="width:100%; height:100%" v-if="canvasid" :id="canvasid" @touchstart="touchstart" @touchmove="touchmove" @touchend="touchend"></canvas>
	</view>
	<!-- #endif -->
</template>

<script lang="uts" setup>
	// @ts-nocheck
	import { getCurrentInstance, nextTick } from "vue";
	import { Echarts } from './uvue';
	// #ifdef WEB
	import { dispatch } from './canvas';
	// #endif
	// #ifndef APP || WEB
	import { Canvas, setCanvasCreator, dispatch } from './canvas';
	import { wrapTouch, convertTouchesToArray, devicePixelRatio, sleep, canIUseCanvas2d, getRect } from './utils';
	// #endif
	type EchartsResolve = (value : Echarts) => void
	defineOptions({
		name: 'l-echart'
	})
	const emits = defineEmits(['finished'])
	const props = defineProps({
		// #ifdef APP
		webviewStyles: {
			type: Object
		},
		customStyle: {
			type: Object
		},
		// #endif
		// #ifndef APP
		webviewStyles: {
			type: Object
		},
		customStyle: {
			type: [String, Object]
		},
		// #endif
		isDisableScroll: {
			type: Boolean,
			default: false
		},
		isClickable: {
			type: Boolean,
			default: true
		},
		enableHover: {
			type: Boolean,
			default: false
		},
		beforeDelay: {
			type: Number,
			default: 30
		}
	})
	const instance = getCurrentInstance()!;
	const canvasid = `lime-echart-${instance.uid}`
	const finished = ref(false)
	const map = [] as EchartsResolve[]
	const callbackMap = [] as EchartsResolve[]
	// let context = null as UniWebViewElement | null
	let chart = null as Echarts | null
	let chartRef = ref<UniWebViewElement | null>(null)

	const trigger = () => {
		// #ifdef APP
		if (finished.value) {
			if (chart == null) {
				chart = new Echarts(chartRef.value!)
			}
			while (map.length > 0) {
				const resolve = map.pop() as EchartsResolve
				resolve(chart!)
			}
		}
		// #endif
		// #ifndef APP
		while (map.length > 0) {
			if (chart != null) {
				const resolve = map.pop() as EchartsResolve
				resolve(chart!)
			}
		}
		// #endif

		if (chart != null) {
			while (callbackMap.length > 0) {
				const callback = callbackMap.pop() as EchartsResolve
				callback(chart!)
			}
		}
	}

	// #ifdef APP
	const loaded = (event : UniWebViewLoadEvent) => {
		event.stopPropagation()
		event.preventDefault()
		finished.value = true
		trigger()
		emits('finished')
	}
	// #endif


	const _next = () : boolean => {
		if (chart == null) {
			console.warn(`组件还未初始化，请先使用 init`)
			return true
		}
		return false
	}
	const setOption = (option : UTSJSONObject) => {
		if (_next()) return
		chart!.setOption(option);
	}
	const showLoading = () => {
		if (_next()) return
		chart!.showLoading();
	}
	const hideLoading = () => {
		if (_next()) return
		chart!.hideLoading();
	}
	const clear = () => {
		if (_next()) return
		chart!.clear();
	}
	const dispose = () => {
		if (_next()) return
		chart!.dispose();
	}
	const resize = (size : UTSJSONObject) => {
		if (_next()) return
		chart!.resize(size);
	}
	const canvasToTempFilePath = (opt : UTSJSONObject) => {
		if (_next()) return
		chart!.canvasToTempFilePath(opt);
	}

	// #ifdef APP
	function init(callback : ((chart : Echarts) => void) | null) : Promise<Echarts> {

		if (callback != null) {
			callbackMap.push(callback)
		}
		return new Promise<Echarts>((resolve) => {
			map.push(resolve)
			trigger()
		})
	}
	// #endif
	// #ifndef APP 
	// #ifndef WEB 
	let use2dCanvas = canIUseCanvas2d()
	const getContext = async () => {
		return new Promise((resolve, reject)=>{
			uni.createCanvasContextAsync({
				id: canvasid,
				component: instance.proxy!,
				success: (context : CanvasContext) => {
					const canvasContext = context.getContext('2d')!;
					const canvas = canvasContext.canvas;
					let uniCanvas;
					const width = canvas.offsetWidth
					const height = canvas.offsetHeight
					// 处理高清屏逻辑
					const dpr = uni.getDeviceInfo().devicePixelRatio ?? 1;
					canvas.width = canvas.offsetWidth * dpr;
					canvas.height = canvas.offsetHeight * dpr;
					canvasContext.scale(dpr, dpr); // 仅需调用一次，当调用 reset 方法后需要再次 scale
					if(use2dCanvas) {
						uniCanvas = new Canvas(canvasContext, instance.proxy, true, context);
					} else {
						uniCanvas =  new Canvas(canvasContext, instance.proxy, false);
					}
					resolve({ canvas: uniCanvas, width, height, devicePixelRatio: 1, node: context});
				},
				fail(err) {
					reject(err)
					console.log('err', err)
				}
			})
		})
		

		// return getRect(`#${canvasid}`, {context: instance.proxy!, type: use2dCanvas ? 'fields': 'boundingClientRect'}).then(res => {
		// 	if(res) {
		// 		let dpr = uni.getWindowInfo().pixelRatio
		// 		let {width, height, node} = res
		// 		let canvas;
		// 		if(node) {
		// 			const ctx = node.getContext('2d');
		// 			canvas = new Canvas(ctx, instance.proxy, true, node);
		// 		} else {
		// 			const ctx = uni.createCanvasContext(canvasid, instance.proxy);
		// 			canvas =  new Canvas(ctx, instance.proxy, false);
		// 		}

		// 		return { canvas, width, height, devicePixelRatio: dpr, node };
		// 	} else {
		// 		return {}
		// 	}
		// })
	}
	// #endif
	const getTouch = (e) => {
		const touches = e.touches[0]
		// #ifdef WEB
		const rect = chart!.getZr().dom.getBoundingClientRect();
		const touch = {
			x: touches.clientX - rect.left,
			y: touches.clientY - rect.top
		}
		// #endif
		// #ifndef WEB
		const touch = {
			x: touches.x,
			y: touches.y
		}
		// #endif
		return touch
	}
	const touchstart = (e) => {
		if (chart == null) return
		const handler = chart.getZr().handler;
		const touch = getTouch(e)
		dispatch.call(handler, 'mousedown', touch)
		dispatch.call(handler, 'click', touch)
	}
	const touchmove = (e) => {
		if (chart == null) return
		const handler = chart.getZr().handler;
		const touch = getTouch(e)
		dispatch.call(handler, 'mousemove', touch)
		// const rect = chart.getZr().dom.getBoundingClientRect()
		// handler.dispatch('mousemove', {
		// 	zrX: e.touches[0].clientX - rect.left,
		// 	zrY: e.touches[0].clientY - rect.top
		// })
	}
	const touchend = (e) => {
		if (chart == null) return
		const handler = chart.getZr().handler;

		const touch = {
			x: 999999999,
			y: 999999999
		}

		dispatch.call(handler, 'mousemove', touch)
		dispatch.call(handler, 'touchend', touch)

	}
	async function init(echarts : any, ...args : any[]) : Promise<Echarts> {
		if (echarts == null) {
			console.error('请确保已经引入了 ECharts 库');
			return Promise.reject('请确保已经引入了 ECharts 库');
		}
		let theme : string | null = null
		let opts = {}
		let callback : Function | null = null;

		args.forEach(item => {
			if (typeof item === 'function') {
				callback = item
			} else if (['string'].includes(typeof item)) {
				theme = item
			} else if (typeof item === 'object') {
				opts = item
			}
		})

		// #ifdef WEB
		echarts.env.domSupported = true
		echarts.env.hasGlobalWindow = true
		echarts.env.node = false
		echarts.env.pointerEventsSupported = false
		echarts.env.svgSupported = true
		echarts.env.touchEventsSupported = true
		echarts.env.transform3dSupported = true
		echarts.env.transformSupported = true
		echarts.env.worker = false
		echarts.env.wxa = false
		chart = echarts.init(chartRef.value, theme, opts)
		// window.addEventListener('touchstart', touchstart)
		// window.addEventListener('touchmove', touchmove)
		// window.addEventListener('touchend', touchend)
		// #endif

		// #ifndef WEB
		let config = await getContext();
		setCanvasCreator(echarts, config)
		chart = echarts.init(config.canvas, theme, Object.assign({}, config, opts))
		// #endif
		if (callback != null && typeof callback == 'function') {
			callbackMap.push(callback)
		}
		return new Promise<Echarts>((resolve) => {
			map.push(resolve)
			trigger()
		})
	}
	onMounted(() => {
		nextTick(() => {
			finished.value = true
			trigger()
			emits('finished')
		})
	})
	onUnmounted(() => {
		// #ifdef WEB
		// window.removeEventListener('touchstart', touchstart)
		// window.removeEventListener('touchmove', touchmove)
		// window.removeEventListener('touchend', touchend)
		// #endif
	})
	// #endif

	defineExpose({
		init,
		setOption,
		showLoading,
		hideLoading,
		clear,
		dispose,
		resize,
		canvasToTempFilePath
	})
</script>
<style lang="scss">
	.lime-echart {
		flex: 1;
		width: 100%;
	}
</style>