462 lines
12 KiB
Vue
462 lines
12 KiB
Vue
<template>
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<view class="lime-painter" ref="limepainter">
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<view v-if="canvasId && size" :style="styles">
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<!-- #ifndef APP-NVUE -->
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<canvas class="lime-painter__canvas" v-if="use2dCanvas" :id="canvasId" type="2d" :style="size"></canvas>
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<canvas class="lime-painter__canvas" v-else :id="canvasId" :canvas-id="canvasId" :style="size"
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:width="boardWidth * dpr" :height="boardHeight * dpr" :hidpi="hidpi"></canvas>
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<!-- #endif -->
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<!-- #ifdef APP-NVUE -->
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<web-view :style="size" ref="webview"
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src="/uni_modules/lime-painter/hybrid/html/index.html"
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class="lime-painter__canvas" @pagefinish="onPageFinish" @error="onError" @onPostMessage="onMessage">
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</web-view>
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<!-- #endif -->
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</view>
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<slot />
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</view>
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</template>
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<script>
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import { parent } from '../common/relation'
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import props from './props'
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import {toPx, base64ToPath, pathToBase64, isBase64, sleep, getImageInfo }from './utils';
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// #ifndef APP-NVUE
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import { canIUseCanvas2d, isPC} from './utils';
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import Painter from './painter';
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// import Painter from '@painter'
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const nvue = {}
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// #endif
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// #ifdef APP-NVUE
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import nvue from './nvue'
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// #endif
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export default {
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name: 'lime-painter',
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mixins: [props, parent('painter'), nvue],
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data() {
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return {
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use2dCanvas: false,
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canvasHeight: 150,
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canvasWidth: null,
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parentWidth: 0,
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inited: false,
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progress: 0,
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firstRender: 0,
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done: false,
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tasks: []
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};
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},
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computed: {
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styles() {
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return `${this.size}${this.customStyle||''};` + (this.hidden && 'position: fixed; left: 1500rpx;')
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},
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canvasId() {
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return `l-painter${this._ && this._.uid || this._uid}`
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},
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size() {
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if (this.boardWidth && this.boardHeight) {
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return `width:${this.boardWidth}px; height: ${this.boardHeight}px;`;
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}
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},
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dpr() {
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return this.pixelRatio || uni.getSystemInfoSync().pixelRatio;
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},
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boardWidth() {
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const {width = 0} = (this.elements && this.elements.css) || this.elements || this
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const w = toPx(width||this.width)
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return w || Math.max(w, toPx(this.canvasWidth));
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},
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boardHeight() {
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const {height = 0} = (this.elements && this.elements.css) || this.elements || this
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const h = toPx(height||this.height)
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return h || Math.max(h, toPx(this.canvasHeight));
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},
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hasBoard() {
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return this.board && Object.keys(this.board).length
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},
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elements() {
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return this.hasBoard ? this.board : JSON.parse(JSON.stringify(this.el))
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}
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},
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created() {
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this.use2dCanvas = this.type === '2d' && canIUseCanvas2d() && !isPC
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},
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async mounted() {
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await sleep(30)
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await this.getParentWeith()
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this.$nextTick(() => {
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setTimeout(() => {
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this.$watch('elements', this.watchRender, {
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deep: true,
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immediate: true
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});
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}, 30)
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})
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},
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// #ifdef VUE3
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unmounted() {
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this.done = false
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this.inited = false
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this.firstRender = 0
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this.progress = 0
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this.painter = null
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clearTimeout(this.rendertimer)
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},
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// #endif
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// #ifdef VUE2
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destroyed() {
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this.done = false
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this.inited = false
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this.firstRender = 0
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this.progress = 0
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this.painter = null
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clearTimeout(this.rendertimer)
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},
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// #endif
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methods: {
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async watchRender(val, old) {
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if (!val || !val.views || (!this.firstRender ? !val.views.length : !this.firstRender) || !Object.keys(val).length || JSON.stringify(val) == JSON.stringify(old)) return;
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this.firstRender = 1
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this.progress = 0
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this.done = false
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clearTimeout(this.rendertimer)
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this.rendertimer = setTimeout(() => {
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this.render(val);
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}, this.beforeDelay)
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},
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async setFilePath(path, param) {
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let filePath = path
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const {pathType = this.pathType} = param || this
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if (pathType == 'base64' && !isBase64(path)) {
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filePath = await pathToBase64(path)
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} else if (pathType == 'url' && isBase64(path)) {
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filePath = await base64ToPath(path)
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}
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if (param && param.isEmit) {
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this.$emit('success', filePath);
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}
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return filePath
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},
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async getSize(args) {
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const {width} = args.css || args
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const {height} = args.css || args
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if (!this.size) {
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if (width || height) {
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this.canvasWidth = width || this.canvasWidth
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this.canvasHeight = height || this.canvasHeight
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await sleep(30);
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} else {
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await this.getParentWeith()
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}
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}
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},
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canvasToTempFilePathSync(args) {
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// this.stopWatch && this.stopWatch()
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// this.stopWatch = this.$watch('done', (v) => {
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// if (v) {
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// this.canvasToTempFilePath(args)
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// this.stopWatch && this.stopWatch()
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// }
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// }, {
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// immediate: true
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// })
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this.tasks.push(args)
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if(this.done){
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this.runTask()
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}
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},
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runTask(){
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while(this.tasks.length){
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const task = this.tasks.shift()
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this.canvasToTempFilePath(task)
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}
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},
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// #ifndef APP-NVUE
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getParentWeith() {
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return new Promise(resolve => {
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uni.createSelectorQuery()
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.in(this)
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.select(`.lime-painter`)
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.boundingClientRect()
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.exec(res => {
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const {width, height} = res[0]||{}
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this.parentWidth = Math.ceil(width||0)
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this.canvasWidth = this.parentWidth || 300
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this.canvasHeight = height || this.canvasHeight||150
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resolve(res[0])
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})
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})
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},
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async render(args = {}) {
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if(!Object.keys(args).length) {
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return console.error('空对象')
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}
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this.progress = 0
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this.done = false
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// #ifdef APP-NVUE
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this.tempFilePath.length = 0
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// #endif
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await this.getSize(args)
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const ctx = await this.getContext();
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let {
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use2dCanvas,
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boardWidth,
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boardHeight,
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canvas,
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afterDelay
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} = this;
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if (use2dCanvas && !canvas) {
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return Promise.reject(new Error('canvas 没创建'));
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}
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this.boundary = {
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top: 0,
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left: 0,
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width: boardWidth,
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height: boardHeight
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};
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this.painter = null
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if (!this.painter) {
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const {width} = args.css || args
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const {height} = args.css || args
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if(!width && this.parentWidth) {
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Object.assign(args, {width: this.parentWidth})
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}
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const param = {
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context: ctx,
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canvas,
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width: boardWidth,
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height: boardHeight,
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pixelRatio: this.dpr,
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useCORS: this.useCORS,
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createImage: getImageInfo.bind(this),
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performance: this.performance,
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listen: {
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onProgress: (v) => {
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this.progress = v
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this.$emit('progress', v)
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},
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onEffectFail: (err) => {
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this.$emit('faill', err)
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}
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}
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}
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this.painter = new Painter(param)
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}
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try{
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// vue3 赋值给data会引起图片无法绘制
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const { width, height } = await this.painter.source(JSON.parse(JSON.stringify(args)))
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this.boundary.height = this.canvasHeight = height
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this.boundary.width = this.canvasWidth = width
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await sleep(this.sleep);
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await this.painter.render()
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await new Promise(resolve => this.$nextTick(resolve));
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if (!use2dCanvas) {
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await this.canvasDraw();
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}
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if (afterDelay && use2dCanvas) {
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await sleep(afterDelay);
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}
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this.$emit('done');
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this.done = true
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if (this.isCanvasToTempFilePath) {
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this.canvasToTempFilePath()
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.then(res => {
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this.$emit('success', res.tempFilePath)
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})
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.catch(err => {
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this.$emit('fail', new Error(JSON.stringify(err)));
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});
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}
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this.runTask()
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return Promise.resolve({
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ctx,
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draw: this.painter,
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node: this.node
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});
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}catch(e){
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//TODO handle the exception
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}
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},
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canvasDraw(flag = false) {
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return new Promise((resolve, reject) => this.ctx.draw(flag, () => setTimeout(() => resolve(), this
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.afterDelay)));
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},
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async getContext() {
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if (!this.canvasWidth) {
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this.$emit('fail', 'painter no size')
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console.error('[lime-painter]: 给画板或父级设置尺寸')
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return Promise.reject();
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}
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if (this.ctx && this.inited) {
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return Promise.resolve(this.ctx);
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}
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const { type, use2dCanvas, dpr, boardWidth, boardHeight } = this;
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const _getContext = () => {
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return new Promise(resolve => {
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uni.createSelectorQuery()
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.in(this)
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.select(`#${this.canvasId}`)
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.boundingClientRect()
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.exec(res => {
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if (res) {
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const ctx = uni.createCanvasContext(this.canvasId, this);
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if (!this.inited) {
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this.inited = true;
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this.use2dCanvas = false;
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this.canvas = res;
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}
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// 钉钉小程序框架不支持 measureText 方法，用此方法 mock
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if (!ctx.measureText) {
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function strLen(str) {
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let len = 0;
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for (let i = 0; i < str.length; i++) {
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if (str.charCodeAt(i) > 0 && str.charCodeAt(i) < 128) {
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len++;
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} else {
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len += 2;
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}
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}
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return len;
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}
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ctx.measureText = text => {
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let fontSize = ctx.state && ctx.state.fontSize || 12;
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const font = ctx.__font
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if (font && fontSize == 12) {
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fontSize = parseInt(font.split(' ')[3], 10);
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}
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fontSize /= 2;
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return {
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width: strLen(text) * fontSize
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};
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}
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}
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// #ifdef MP-ALIPAY
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ctx.scale(dpr, dpr);
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// #endif
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this.ctx = ctx
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resolve(this.ctx);
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} else {
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console.error('[lime-painter] no node')
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}
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});
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});
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};
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if (!use2dCanvas) {
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return _getContext();
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}
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return new Promise(resolve => {
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uni.createSelectorQuery()
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.in(this)
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.select(`#${this.canvasId}`)
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.node()
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.exec(res => {
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let {node: canvas} = res && res[0]||{};
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if(canvas) {
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const ctx = canvas.getContext(type);
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if (!this.inited) {
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this.inited = true;
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this.use2dCanvas = true;
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this.canvas = canvas;
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}
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this.ctx = ctx
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resolve(this.ctx);
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} else {
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console.error('[lime-painter]: no size')
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}
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});
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});
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},
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canvasToTempFilePath(args = {}) {
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return new Promise(async (resolve, reject) => {
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const { use2dCanvas, canvasId, dpr, fileType, quality } = this;
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const success = async (res) => {
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try {
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const tempFilePath = await this.setFilePath(res.tempFilePath || res, args)
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const result = Object.assign(res, {tempFilePath})
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args.success && args.success(result)
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resolve(result)
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} catch (e) {
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this.$emit('fail', e)
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}
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}
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let { top: y = 0, left: x = 0, width, height } = this.boundary || this;
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// let destWidth = width * dpr;
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// let destHeight = height * dpr;
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// #ifdef MP-ALIPAY
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// width = destWidth;
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// height = destHeight;
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// #endif
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const copyArgs = Object.assign({
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// x,
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// y,
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// width,
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// height,
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// destWidth,
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// destHeight,
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canvasId,
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id: canvasId,
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fileType,
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quality,
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}, args, {success});
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// if(this.isPC || use2dCanvas) {
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// copyArgs.canvas = this.canvas
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// }
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if (use2dCanvas) {
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copyArgs.canvas = this.canvas
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try{
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// #ifndef MP-ALIPAY
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const oFilePath = this.canvas.toDataURL(`image/${args.fileType||fileType}`.replace(/pg/, 'peg'), args.quality||quality)
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if(/data:,/.test(oFilePath)) {
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uni.canvasToTempFilePath(copyArgs, this);
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} else {
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const tempFilePath = await this.setFilePath(oFilePath, args)
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args.success && args.success({tempFilePath})
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resolve({tempFilePath})
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}
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// #endif
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// #ifdef MP-ALIPAY
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this.canvas.toTempFilePath(copyArgs)
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// #endif
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}catch(e){
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args.fail && args.fail(e)
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reject(e)
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}
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} else {
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// #ifdef MP-ALIPAY
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if(this.ctx.toTempFilePath) {
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// 钉钉
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const ctx = uni.createCanvasContext(canvasId);
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ctx.toTempFilePath(copyArgs);
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} else {
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my.canvasToTempFilePath(copyArgs);
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}
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// #endif
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// #ifndef MP-ALIPAY
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uni.canvasToTempFilePath(copyArgs, this);
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// #endif
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}
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})
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}
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// #endif
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}
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};
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</script>
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<style>
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.lime-painter,
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.lime-painter__canvas {
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// #ifndef APP-NVUE
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width: 100%;
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// #endif
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// #ifdef APP-NVUE
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flex: 1;
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// #endif
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}
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</style>
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