/**
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* @author clmtulip(车丽美, clmtulip@gmail.com) liyong(liyong1239@163.com)
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*/
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// Modified from d3-cloud
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/*
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Copyright (c) 2013, Jason Davies.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* The name Jason Davies may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL JASON DAVIES BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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define(function (require) {
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var ZeroArray = require('../layout/WordCloudRectZero');
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var zrUtil = require('zrender/tool/util');
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function CloudLayout(option) {
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this._init(option);
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}
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CloudLayout.prototype = {
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/**
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* 启动计算过程
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*/
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start: function () {
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var board = null;
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var maxWit = 0;
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var maxHit = 0;
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var maxArea = 0;
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var i = -1;
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var tags = [];
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var maxBounds = null; /*图片的最大可用边框*/
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// 根据配置 初始化 字符云数组
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var data = this.wordsdata;
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var dfop = this.defaultOption;
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var wordletype = dfop.wordletype;
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var size = dfop.size;
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var that = this;
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//得到 ZeroArray 传递过来的 初始值 和面积 最大宽度等值
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var zeroArrayObj = new ZeroArray({
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type: wordletype.type,
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width: size[0],
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height: size[1]
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});
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zeroArrayObj.calculate(function (options) {
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board = options.initarr;
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maxWit = options.maxWit;
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maxHit = options.maxHit;
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maxArea = options.area;
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maxBounds = options.imgboard;
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startStep();
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}, this);
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return this;
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function startStep() {
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that.totalArea = maxArea;
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//字体大小的确定，可配置，根据开关 确定是否要根据面积来定。。
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if (wordletype.autoSizeCal.enable) {
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that._autoCalTextSize(data, maxArea, maxWit, maxHit, wordletype.autoSizeCal.minSize);
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}
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if (dfop.timer) {
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clearInterval(dfop.timer);
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}
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dfop.timer = setInterval(step, 0);
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step();
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}
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function step() {
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var start = +new Date;
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var n = data.length;
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var d;
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while (+new Date - start < dfop.timeInterval && ++i < n && dfop.timer) {
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d = data[i];
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// x y 的初始值
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d.x = size[0] >> 1;
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d.y = size[1] >> 1;
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//得到每个 标签所占用的具体的像素点 用 0 1 标记， 每32位作为一个数字
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that._cloudSprite(d, data, i);
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//place 放置每个字符， 成功后 以 event 事件通知
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if (d.hasText && that._place(board, d, maxBounds)) {
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tags.push(d);
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// event.word(d);
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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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//全部放置完成 停止cloud，并触发 'end'事件
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if (i >= n) {
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that.stop();
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that._fixTagPosition(tags);
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dfop.endcallback(tags);
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}
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}
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},
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_fixTagPosition: function (tags) {
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var center = this.defaultOption.center;
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for (var i = 0, len = tags.length; i < len; i++) {
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tags[i].x += center[0];
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tags[i].y += center[1];
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}
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},
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/**
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* 停止计算过程
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*/
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stop: function () {
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if (this.defaultOption.timer) {
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clearInterval(this.defaultOption.timer);
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this.defaultOption.timer = null;
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}
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return this;
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},
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/**
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* 计算结束后 执行V
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* @param v
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*/
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end: function (v) {
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if (v) {
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this.defaultOption.endcallback = v;
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}
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return this;
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},
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/**
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* 初始化
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* @param option
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* @private
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*/
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_init: function (option) {
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this.defaultOption = {};
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/*初始化属性*/
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this._initProperty(option);
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/*初始化方法*/
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this._initMethod(option);
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/*初始化 canvas 画板*/
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this._initCanvas();
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/*初始化数据*/
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this._initData(option.data);
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},
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_initData: function (datas) {
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var that = this;
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var thatop = that.defaultOption;
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this.wordsdata = datas.map(function (d, i) {
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d.text = thatop.text.call(that, d, i);
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d.font = thatop.font.call(that, d, i);
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d.style = thatop.fontStyle.call(that, d, i);
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d.weight = thatop.fontWeight.call(that, d, i);
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// 字体的旋转角度
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d.rotate = thatop.rotate.call(that, d, i);
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// 字体的大小 单位px
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d.size = ~~thatop.fontSize.call(that, d, i);
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// 字体间的间距
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d.padding = thatop.padding.call(that, d, i);
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return d;
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}).sort(function (a, b) {
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return b.value - a.value;
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});
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},
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/**
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* 默认函数的定义 及初始化过程
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* @private
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*/
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_initMethod: function (option) {
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/*数据初始化中要用到的函数*/
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var dfop = this.defaultOption;
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dfop.text = (option.text) ? functor(option.text) : cloudText;
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dfop.font = (option.font) ? functor(option.font) : cloudFont;
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dfop.fontSize = (option.fontSize) ? functor(option.fontSize) : cloudFontSize;
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dfop.fontStyle = (option.fontStyle) ? functor(option.fontStyle) : cloudFontNormal;
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dfop.fontWeight = (option.fontWeight) ? functor(option.fontWeight) : cloudFontNormal;
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dfop.rotate = (option.rotate) ? newCloudRotate(option.rotate) : cloudRotate;
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dfop.padding = (option.padding) ? functor(option.padding) : cloudPadding;
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dfop.center = option.center;
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/*其它函数*/
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dfop.spiral = archimedeanSpiral;
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dfop.endcallback = function () {
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};
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dfop.rectangularSpiral = rectangularSpiral;
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dfop.archimedeanSpiral = archimedeanSpiral;
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function cloudText(d) {
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return d.name;
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}
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function cloudFont() {
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return "sans-serif";
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}
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function cloudFontNormal() {
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return "normal";
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}
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function cloudFontSize(d) {
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return d.value;
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}
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function cloudRotate() {
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return 0;
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}
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function newCloudRotate(rotate) {
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return function () {
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return rotate[Math.round(Math.random() * (rotate.length - 1))]
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}
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}
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function cloudPadding() {
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return 0;
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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 [
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e * (t *= .1) * Math.cos(t),
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t * Math.sin(t)
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];
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};
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}
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function rectangularSpiral(size) {
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var dy = 4;
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var dx = dy * size[0] / size[1];
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var x = 0;
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var y = 0;
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return function (t) {
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var sign = t < 0 ? -1 : 1;
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// See triangular numbers: T_n = n * (n + 1) / 2.
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switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) {
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case 0:
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x += dx;
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break;
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case 1:
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y += dy;
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break;
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case 2:
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x -= dx;
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break;
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default:
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y -= dy;
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break;
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}
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return [
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x,
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y
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];
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};
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}
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function functor(v) {
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return typeof v === "function" ? v : function () {
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return v;
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};
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}
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},
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_initProperty: function (option) {
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var dfop = this.defaultOption;
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//默认值
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dfop.size = option.size || [
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256,
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256
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];
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dfop.wordletype = option.wordletype;
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dfop.words = option.words || [];
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dfop.timeInterval = Infinity;
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dfop.timer = null;
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dfop.spirals = {
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archimedean: dfop.archimedeanSpiral,
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rectangular: dfop.rectangularSpiral
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};
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zrUtil.merge(dfop, {
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size: [
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256,
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256
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],
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wordletype: {
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type: 'RECT',
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areaPresent: .058,
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autoSizeCal: {
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enable: true,
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minSize: 12
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}
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}
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});
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},
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_initCanvas: function () {
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var cloudRadians = Math.PI / 180;
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var cw = 1 << 11 >> 5;
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var ch = 1 << 11;
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var canvas;
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var ratio = 1;
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if (typeof document !== "undefined") {
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canvas = document.createElement("canvas");
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canvas.width = 1;
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canvas.height = 1;
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ratio = Math.sqrt(
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canvas.getContext("2d")
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.getImageData(0, 0, 1, 1)
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.data.length >> 2
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);
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canvas.width = (cw << 5) / ratio;
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canvas.height = ch / ratio;
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}
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else {
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// Attempt to use node-canvas.
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canvas = new Canvas(cw << 5, ch);
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}
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var c = canvas.getContext("2d");
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c.fillStyle = c.strokeStyle = "red";
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c.textAlign = "center";
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this.defaultOption.c = c;
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this.defaultOption.cw = cw;
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this.defaultOption.ch = ch;
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this.defaultOption.ratio = ratio;
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this.defaultOption.cloudRadians = cloudRadians;
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},
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_cloudSprite: function (d, data, di) {
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if (d.sprite) {
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return;
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}
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var cw = this.defaultOption.cw;
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var ch = this.defaultOption.ch;
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var c = this.defaultOption.c;
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var ratio = this.defaultOption.ratio;
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var cloudRadians = this.defaultOption.cloudRadians;
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c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
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var x = 0;
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var y = 0;
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var maxh = 0;
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var 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.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
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//得到 字体 实际的 宽和高
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var w = c.measureText(d.text + "m").width * ratio;
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var h = d.size << 1;
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//得到 d 所占用的具体的宽度 和高度 并取整
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if (d.rotate) {
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var sr = Math.sin(d.rotate * cloudRadians);
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var cr = Math.cos(d.rotate * cloudRadians);
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var wcr = w * cr;
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var wsr = w * sr;
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var hcr = h * cr;
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var 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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}
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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) {
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maxh = h;
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}
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//如果 字体 超出了 宽度 换更远的一行。。。
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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) {
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break;
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}
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c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
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if (d.rotate) {
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c.rotate(d.rotate * cloudRadians);
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}
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c.fillText(d.text, 0, 0);
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if (d.padding) {
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c.lineWidth = 2 * d.padding;
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c.strokeText(d.text, 0, 0);
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}
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c.restore();
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d.width = w;
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d.height = h;
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// xoff yoff 为 d在画板中的坐标位置
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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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//得到 所在 区域的 像素值。。进而 确定 其 y的位置。。。
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var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data;
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var sprite = [];
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while (--di >= 0) {
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d = data[di];
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if (!d.hasText) {
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continue;
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}
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var w = d.width;
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var w32 = w >> 5;
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var h = d.y1 - d.y0;
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// Zero the buffer
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for (var i = 0; i < h * w32; i++) {
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sprite[i] = 0;
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}
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x = d.xoff;
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if (x == null) {
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return;
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}
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y = d.yoff;
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var seen = 0;
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var 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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var 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) {
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seenRow = j;
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}
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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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_place: function (board, tag, maxBounds) {
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/*判断目前面积总值 是否超过了阈值*/
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/*判断目前该值是否能够放的下*/
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var size = this.defaultOption.size;
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var perimeter = [
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{x: 0, y: 0},
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{x: size[0], y: size[1]}
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];
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var startX = tag.x;
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var startY = tag.y;
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var maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]);
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var s = this.defaultOption.spiral(size);
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var dt = Math.random() < .5 ? 1 : -1;
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var t = -dt;
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var dxdy;
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var dx;
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var 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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//当dx dy 都大于 maxDelta 即超出了 画板范围， 停止 放置。。 该值舍弃
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if (Math.min(dx, dy) > maxDelta) {
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break;
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}
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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]) {
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continue;
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}
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// TODO only check for collisions within current bounds.
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if (!cloudCollide(tag, board, size[0])) {
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if (collideRects(tag, maxBounds)) {
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var sprite = tag.sprite;
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var w = tag.width >> 5;
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var sw = size[0] >> 5;
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var lx = tag.x - (w << 4);
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var sx = lx & 0x7f;
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var msx = 32 - sx;
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var h = tag.y1 - tag.y0;
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var x = (tag.y + tag.y0) * sw + (lx >> 5);// 计算其在画板的 横坐标的位置
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var last;
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//当 该 字能够被正确放置时， 根据该字体的范围 更改标志位范围
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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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function cloudCollide(tag, board, sw) {
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sw >>= 5;
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var sprite = tag.sprite;
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var w = tag.width >> 5;
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var lx = tag.x - (w << 4);
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var sx = lx & 0x7f;
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var msx = 32 - sx;
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var h = tag.y1 - tag.y0;
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var x = (tag.y + tag.y0) * sw + (lx >> 5);
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var 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]) {
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return true;
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}
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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, maxBounds) {
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return maxBounds.row[a.y] && maxBounds.cloumn[a.x]
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&& a.x >= maxBounds.row[a.y].start
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&& a.x <= maxBounds.row[a.y].end
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&& a.y >= maxBounds.cloumn[a.x].start
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&& a.y <= maxBounds.cloumn[a.x].end;
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}
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},
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_autoCalTextSize: function (data, shapeArea, maxwidth, maxheight, minSize) {
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//循环
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//面积 归一化
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//计算 每个字体的面积
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var sizesum = sum(data, function (k) {
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return k.size;
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});
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var i = data.length;
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var maxareapre = .25; /*面积归一化后， 字体占总面积的最大百分比*/
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var minTextSize = minSize; /*字体所能缩放的最小大小。。如果字体面积 依旧无法满足上述约束， 字体将不会再缩小*/
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var cw = this.defaultOption.cw;
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var ch = this.defaultOption.ch;
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var c = this.defaultOption.c;
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var ratio = this.defaultOption.ratio;
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var cloudRadians = this.defaultOption.cloudRadians;
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var d;
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var dpre;
|
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while (i--) {
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d = data[i];
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dpre = d.size / sizesum;
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if (maxareapre) {
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d.areapre = (dpre < maxareapre) ? dpre : maxareapre;
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}
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else {
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d.areapre = dpre;
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}
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d.area = shapeArea * d.areapre;
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d.totalarea = shapeArea;
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measureTextWitHitByarea(d);
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}
|
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//根据面积 计算字体的 size
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//根据 最大宽度 和最大高度 重新检测 字体的size， 不符合条件 重新计算，若字体大小已经是 最小size，则 取消计算。。。
|
function measureTextWitHitByarea(d) {
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c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
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c.save();
|
c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
|
|
//得到 字体 实际的 宽和高
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var w = c.measureText(d.text + "m").width * ratio,
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h = d.size << 1;
|
|
//得到 d 所占用的具体的宽度 和高度 并取整
|
w = (w + 0x1f) >> 5 << 5; //给定了一个最小值 1 即不会存在 宽度为0的情况
|
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c.restore();
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d.aw = w;
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d.ah = h;
|
|
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var k, rw, rh;
|
|
//如果 有旋转 测试 旋转后的 宽和高 是否 超过了 最大的大小
|
if (d.rotate) {
|
var sr = Math.sin(d.rotate * cloudRadians);
|
var cr = Math.cos(d.rotate * cloudRadians);
|
var wcr = w * cr;
|
var wsr = w * sr;
|
var hcr = h * cr;
|
var hsr = h * sr;
|
|
rw = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
|
rh = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
|
}
|
|
|
//满足条件 不用继续调整的
|
// size 为 最小， 或者面积在允许范围内 且 宽和高也在允许范围内
|
if ((d.size <= minTextSize)
|
|| (d.rotate && w * h <= d.area && rw <= maxwidth && rh <= maxheight)
|
|| (w * h <= d.area && w <= maxwidth && h <= maxheight)) {
|
d.area = w * h;
|
return;
|
}
|
|
//如果 超过了 最大宽度 或最大高度。。 继续计算
|
if (d.rotate && rw > maxwidth && rh > maxheight) {// 有旋转时，超过了 最大宽度和最大高度
|
k = Math.min(maxwidth / rw, maxheight / rh);
|
}
|
else if (w > maxwidth || h > maxheight) {// 无旋转时，超过了 最大宽度和最大高度
|
k = Math.min(maxwidth / w, maxheight / h);
|
}
|
else { // 当前 面积 大于 规定的面积时
|
k = Math.sqrt(d.area / (d.aw * d.ah));
|
}
|
|
d.size = ~~(k * d.size);
|
|
if (d.size < minSize) {
|
d.size = minSize;
|
return;
|
}
|
|
return measureTextWitHitByarea(d);
|
}
|
|
function sum(dts, callback) {
|
var j = dts.length;
|
var ressum = 0;
|
while (j--) {
|
ressum += callback(dts[j]);
|
}
|
|
return ressum;
|
}
|
}
|
|
};
|
|
|
return CloudLayout;
|
});
|
