xiaowen
3 years ago
parent
42af666487
commit
cf1690ce2a
File diff suppressed because it is too large
Load Diff
@ -1,50 +1,98 @@
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// word-cloud/index.js
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const {
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WordCloud
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} = require("./WordCloud.js")
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// components/word-cloud/index.js
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import WordCloud from './wordcloud'
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const options = {
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"list": [],
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"gridSize": 6, // size of the grid in pixels
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"weightFactor": 1.5, // number to multiply for size of each word in the list
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"fontWeight": 'normal', // 'normal', 'bold' or a callback
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"fontFamily": 'Times, serif', // font to use
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"color": 'red', // 'random-dark' or 'random-light'
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"backgroundColor": '#fff', // the color of canvas
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"rotateRatio": 0, // probability for the word to rotate. 1 means always
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"minFontSize": 12, //最小字号
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"maxFontSize": 60, //最大字号
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"fontSizeFactor": 5,
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"ellipticity": 1,
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"shuffle": false,
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"figPath": '../../images/carSide.png'
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}
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Component({
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/**
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* 组件的属性列表
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*/
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properties: {
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list: {
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type: Array,
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value: [],
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width: {
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type: Number,
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value: 375
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},
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height: {
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type: String,
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value: "200"
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type: Number,
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value: 450
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},
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width: {
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bgColor: {
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type: String,
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value: ""
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value: '#fff',
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},
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color: {
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type: String,
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value: "random-light"
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list: {
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type: Array,
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value: [],
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}
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},
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lifetimes: {
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attached: function() {
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// 在组件实例进入页面节点树时执行
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const query = this.createSelectorQuery()
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query.select('#myCanvas')
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.fields({ node: true, size: true })
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.exec((res) => {
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this.data.canvas = res[0].node
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})
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},
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},
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observers: {
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list(newVal) {
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if(!newVal || !Array.isArray(newVal) || newVal.length === 0) return
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let { width, height, list, wordData } = this.data
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list = newVal;
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if (!width || isNaN(Number(width))) {
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width = 375
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}
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if (!height || isNaN(Number(height))) {
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height = 450
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}
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const dpr = wx.getSystemInfoSync().pixelRatio
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options.height = height * dpr
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options.width = width * dpr
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options.list = list
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setTimeout(()=>{
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if (this.data.canvas) {
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const wordCloud = new WordCloud(this.data.canvas, options)
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wordData = wordCloud.start()
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this.setData({
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wordData,
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width,
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height,
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})
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}
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}, 500)
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}
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},
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/**
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* 组件的初始数据
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*/
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data: {
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spans: []
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wordData: [],
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canvas: null,
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},
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ready() {
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let that = this;
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this.ctx = wx.createCanvasContext('canvas', this);
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let query = this.createSelectorQuery();
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query.select("#canvas").boundingClientRect(function (res) {
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WordCloud(that.ctx, res, {
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minSize: 8,
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list: that.data.list,
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color: that.data.color
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}, that, function (val) {
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that.data.spans.push(val)
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// w.to_file("../../images/carSide.png")
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that.setData({
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spans: that.data.spans
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})
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})
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}).exec();
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/**
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* 组件的方法列表
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*/
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methods: {
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bindWord(event) {
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const { detail } = event.currentTarget.dataset
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this.triggerEvent('detail', detail);
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},
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}
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})
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})
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@ -1,8 +1,6 @@
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<view style="position:relative;width:100%;">
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<view style="position:absolute;width:100%;visibility:hidden;">
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<canvas style="width:100%;height: {{height}}px;" id="canvas" canvas-id="canvas"></canvas>
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</view>
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<view style="position:relative;">
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<view wx:for="{{spans}}" wx:key="{{index}}" style="position:absolute;left:{{((item.gx + item.info.gw / 2) * item.g + item.info.fillTextOffsetX)}}px;top:{{((item.gy + item.info.gh / 2) * item.g + item.info.fillTextOffsetY)}}px;width:{{item.info.fillTextWidth * 2}}px;height:{{item.info.fillTextHeight}}px;line-height:{{item.fontSize}}px;font-size:{{(item.fontSize * item.info.mu)}}px; transform:{{item.transformRule}};transformOrigin:50% 40%;color:{{item.color}}">{{item.word}}</view>
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</view>
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<canvas type="2d" id="myCanvas" class="wc-canvas"></canvas>
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<view class="wc-main" style="width: {{ width ? width + 'px' : '100%' }};height: {{ height }}px; background-color: {{bgColor || '#fff'}};">
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<block wx:for="{{wordData}}" wx:key="index">
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<text class="wc-item" style="top:{{item.top}}rpx;left:{{ item.left }}rpx; transform:{{item.transform}};lineHeight:{{item.fontSize}}rpx;font:{{item.font}};color:{{item.color}};" catchtap="bindWord" data-detail="{{item}}" >{{ item.word }} </text>
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</block>
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</view>
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@ -1 +1,16 @@
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/* word-cloud/index.wxss */
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/* components/word-cloud/index.wxss */
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.wc-canvas {
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display: none;
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position: absolute;
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z-index: -1;
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}
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.wc-main {
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position: relative;
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}
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.wc-item {
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white-space: nowrap;
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position: absolute;
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display: block;
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transform-origin: 50% 40%;
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}
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@ -0,0 +1,247 @@
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function WordCloud(wdata, laySize) {
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var cloudRadians = Math.PI / 180,
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cw = 1 << 11 >> 5,
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ch = 1 << 11;
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let data = wdata
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let words = wdata
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let canvas = cloudCanvas
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let random = Math.random
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let size = laySize
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let spiral = archimedeanSpiral
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step()
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console.log('===', words)
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function zeroArray(n) {
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var a = [],
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i = -1;
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while (++i < n) a[i] = 0;
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return a;
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}
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function step() {
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var contextAndRatio = getContext(canvas()),
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board = zeroArray((size[0] >> 5) * size[1]),
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bounds = null,
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n = words.length,
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i = 0,
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tags = []
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for (i; i < n; i++) {
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var d = data[i];
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d.x = (size[0] * (random() + .5)) >> 1;
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d.y = (size[1] * (random() + .5)) >> 1;
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cloudSprite(contextAndRatio, d, data, i);
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if (d.hasText && place(board, d, bounds)) {
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tags.push(d);
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if (bounds) cloudBounds(bounds, d);
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else bounds = [{ x: d.x + d.x0, y: d.y + d.y0 }, { x: d.x + d.x1, y: d.y + d.y1 }];
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// Temporary hack
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d.x -= size[0] >> 1;
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d.y -= size[1] >> 1;
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}
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}
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}
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function cloudCanvas() {
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return document.createElement("canvas");
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}
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function getContext(canvas) {
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canvas.width = canvas.height = 1;
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var ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2);
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canvas.width = (cw << 5) / ratio;
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canvas.height = ch / ratio;
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var context = canvas.getContext("2d");
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context.fillStyle = context.strokeStyle = "red";
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context.textAlign = "center";
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return { context: context, ratio: ratio };
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}
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function cloudSprite(contextAndRatio, d, data, di) {
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if (d.sprite) return;
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var c = contextAndRatio.context,
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ratio = contextAndRatio.ratio;
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c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
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var x = 0,
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y = 0,
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maxh = 0,
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n = data.length;
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--di;
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while (++di < n) {
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d = data[di];
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c.save();
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// c.font = ~~((d.size + 1) / ratio) + "px " + (d.font || "Arial");
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c.font = `${(((d.size) / ratio))}px ${(d.font || "Arial")}`
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var w = c.measureText(d.text + "m").width * ratio,
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h = d.size << 1;
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if (d.rotate) {
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var sr = Math.sin(d.rotate * cloudRadians),
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cr = Math.cos(d.rotate * cloudRadians),
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wcr = w * cr,
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wsr = w * sr,
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hcr = h * cr,
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hsr = h * sr;
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w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
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h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
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} else {
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w = (w + 0x1f) >> 5 << 5;
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}
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if (h > maxh) maxh = h;
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if (x + w >= (cw << 5)) {
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x = 0;
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y += maxh;
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maxh = 0;
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}
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if (y + h >= ch) break;
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c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
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if (d.rotate) c.rotate(d.rotate * cloudRadians);
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c.fillText(d.text, 0, 0);
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if (d.padding) c.lineWidth = 2 * d.padding, c.strokeText(d.text, 0, 0);
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c.restore();
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d.width = w;
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d.height = h;
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d.xoff = x;
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d.yoff = y;
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d.x1 = w >> 1;
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d.y1 = h >> 1;
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d.x0 = -d.x1;
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d.y0 = -d.y1;
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d.hasText = true;
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x += w;
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}
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var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data,
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sprite = [];
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while (--di >= 0) {
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d = data[di];
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if (!d.hasText) continue;
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var w = d.width,
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w32 = w >> 5,
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h = d.y1 - d.y0;
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// Zero the buffer
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for (var i = 0; i < h * w32; i++) sprite[i] = 0;
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x = d.xoff;
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if (x == null) return;
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y = d.yoff;
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var seen = 0,
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seenRow = -1;
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for (var j = 0; j < h; j++) {
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for (var i = 0; i < w; i++) {
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var k = w32 * j + (i >> 5),
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m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0;
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sprite[k] |= m;
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seen |= m;
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}
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if (seen) seenRow = j;
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else {
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d.y0++;
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h--;
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j--;
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y++;
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}
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}
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d.y1 = d.y0 + seenRow;
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d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
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}
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}
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function place(board, tag, bounds) {
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var perimeter = [{ x: 0, y: 0 }, { x: size[0], y: size[1] }],
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startX = tag.x,
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startY = tag.y,
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maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]),
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s = spiral(size),
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dt = random() < .5 ? 1 : -1,
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t = -dt,
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dxdy,
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dx,
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dy;
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while (dxdy = s(t += dt)) {
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dx = ~~dxdy[0];
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dy = ~~dxdy[1];
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if (Math.min(Math.abs(dx), Math.abs(dy)) >= maxDelta) break;
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tag.x = startX + dx;
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tag.y = startY + dy;
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if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 ||
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tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
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// TODO only check for collisions within current bounds.
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if (!bounds || !cloudCollide(tag, board, size[0])) {
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if (!bounds || collideRects(tag, bounds)) {
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var sprite = tag.sprite,
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w = tag.width >> 5,
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sw = size[0] >> 5,
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lx = tag.x - (w << 4),
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sx = lx & 0x7f,
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msx = 32 - sx,
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h = tag.y1 - tag.y0,
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x = (tag.y + tag.y0) * sw + (lx >> 5),
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last;
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for (var j = 0; j < h; j++) {
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last = 0;
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for (var i = 0; i <= w; i++) {
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board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
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}
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x += sw;
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}
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delete tag.sprite;
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return true;
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}
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}
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}
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return false;
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}
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function cloudCollide(tag, board, sw) {
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sw >>= 5;
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var sprite = tag.sprite,
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w = tag.width >> 5,
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lx = tag.x - (w << 4),
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sx = lx & 0x7f,
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msx = 32 - sx,
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h = tag.y1 - tag.y0,
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x = (tag.y + tag.y0) * sw + (lx >> 5),
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last;
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for (var j = 0; j < h; j++) {
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last = 0;
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for (var i = 0; i <= w; i++) {
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if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0))
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& board[x + i]) return true;
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}
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x += sw;
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}
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return false;
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}
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function collideRects(a, b) {
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return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
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}
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function cloudBounds(bounds, d) {
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var b0 = bounds[0],
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b1 = bounds[1];
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if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0;
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if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0;
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if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1;
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if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1;
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}
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function archimedeanSpiral(size) {
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var e = size[0] / size[1];
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return function (t) {
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return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
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};
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}
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}
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