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/**
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* we-cropper v1.2.0
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* (c) 2018 dlhandsome
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* @license MIT
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*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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typeof define === 'function' && define.amd ? define(factory) :
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(global.WeCropper = factory());
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}(this, (function () { 'use strict';
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var device = void 0;
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var TOUCH_STATE = ['touchstarted', 'touchmoved', 'touchended'];
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function isFunction (obj) {
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return typeof obj === 'function'
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}
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function firstLetterUpper (str) {
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return str.charAt(0).toUpperCase() + str.slice(1)
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}
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function setTouchState (instance) {
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var arg = [], len = arguments.length - 1;
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while ( len-- > 0 ) arg[ len ] = arguments[ len + 1 ];
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TOUCH_STATE.forEach(function (key, i) {
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if (arg[i] !== undefined) {
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instance[key] = arg[i];
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}
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});
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}
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function validator (instance, o) {
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Object.defineProperties(instance, o);
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}
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function getDevice () {
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if (!device) {
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device = wx.getSystemInfoSync();
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}
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return device
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}
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var tmp = {};
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var DEFAULT = {
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id: {
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default: 'cropper',
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get: function get () {
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return tmp.id
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},
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set: function set (value) {
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if (typeof (value) !== 'string') {
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console.error(("id：" + value + " is invalid"));
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}
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tmp.id = value;
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}
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},
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width: {
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default: 750,
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get: function get () {
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return tmp.width
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},
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set: function set (value) {
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if (typeof (value) !== 'number') {
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console.error(("width：" + value + " is invalid"));
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}
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tmp.width = value;
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}
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},
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height: {
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default: 750,
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get: function get () {
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return tmp.height
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},
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set: function set (value) {
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if (typeof (value) !== 'number') {
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console.error(("height：" + value + " is invalid"));
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}
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tmp.height = value;
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}
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},
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scale: {
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default: 2.5,
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get: function get () {
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return tmp.scale
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},
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set: function set (value) {
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if (typeof (value) !== 'number') {
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console.error(("scale：" + value + " is invalid"));
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}
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tmp.scale = value;
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}
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},
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zoom: {
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default: 5,
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get: function get () {
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return tmp.zoom
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},
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set: function set (value) {
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if (typeof (value) !== 'number') {
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console.error(("zoom：" + value + " is invalid"));
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} else if (value < 0 || value > 10) {
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console.error("zoom should be ranged in 0 ~ 10");
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}
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tmp.zoom = value;
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}
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},
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src: {
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default: 'cropper',
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get: function get () {
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return tmp.src
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},
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set: function set (value) {
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if (typeof (value) !== 'string') {
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console.error(("id：" + value + " is invalid"));
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}
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tmp.src = value;
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}
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},
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cut: {
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default: {},
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get: function get () {
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return tmp.cut
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},
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set: function set (value) {
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if (typeof (value) !== 'object') {
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console.error(("id：" + value + " is invalid"));
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}
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tmp.cut = value;
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}
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},
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onReady: {
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default: null,
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get: function get () {
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return tmp.ready
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},
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set: function set (value) {
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tmp.ready = value;
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}
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},
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onBeforeImageLoad: {
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default: null,
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get: function get () {
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return tmp.beforeImageLoad
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},
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set: function set (value) {
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tmp.beforeImageLoad = value;
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}
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},
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onImageLoad: {
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default: null,
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get: function get () {
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return tmp.imageLoad
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},
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set: function set (value) {
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tmp.imageLoad = value;
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}
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},
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onBeforeDraw: {
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default: null,
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get: function get () {
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return tmp.beforeDraw
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},
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set: function set (value) {
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tmp.beforeDraw = value;
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}
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}
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};
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function prepare () {
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var self = this;
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var ref = getDevice();
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var windowWidth = ref.windowWidth;
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self.attachPage = function () {
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var pages = getCurrentPages();
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// 获取到当前page上下文
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var pageContext = pages[pages.length - 1];
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// 把this依附在Page上下文的wecropper属性上，便于在page钩子函数中访问
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pageContext.wecropper = self;
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};
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self.createCtx = function () {
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var id = self.id;
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if (id) {
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self.ctx = wx.createCanvasContext(id);
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} else {
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console.error("constructor: create canvas context failed, 'id' must be valuable");
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}
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};
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self.deviceRadio = windowWidth / 750;
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}
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function observer () {
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var self = this;
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var EVENT_TYPE = ['ready', 'beforeImageLoad', 'beforeDraw', 'imageLoad'];
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self.on = function (event, fn) {
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if (EVENT_TYPE.indexOf(event) > -1) {
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if (typeof (fn) === 'function') {
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event === 'ready'
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? fn(self)
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: self[("on" + (firstLetterUpper(event)))] = fn;
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}
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} else {
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console.error(("event: " + event + " is invalid"));
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}
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return self
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};
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}
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var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
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function createCommonjsModule(fn, module) {
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return module = { exports: {} }, fn(module, module.exports), module.exports;
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}
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var base64 = createCommonjsModule(function (module, exports) {
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/*! http://mths.be/base64 v0.1.0 by @mathias | MIT license */
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(function(root) {
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// Detect free variables `exports`.
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var freeExports = 'object' == 'object' && exports;
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// Detect free variable `module`.
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var freeModule = 'object' == 'object' && module &&
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module.exports == freeExports && module;
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// Detect free variable `global`, from Node.js or Browserified code, and use
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// it as `root`.
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var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
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if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
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root = freeGlobal;
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}
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/*--------------------------------------------------------------------------*/
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var InvalidCharacterError = function(message) {
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this.message = message;
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};
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InvalidCharacterError.prototype = new Error;
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InvalidCharacterError.prototype.name = 'InvalidCharacterError';
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var error = function(message) {
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// Note: the error messages used throughout this file match those used by
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// the native `atob`/`btoa` implementation in Chromium.
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throw new InvalidCharacterError(message);
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};
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var TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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// http://whatwg.org/html/common-microsyntaxes.html#space-character
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var REGEX_SPACE_CHARACTERS = /[\t\n\f\r ]/g;
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// `decode` is designed to be fully compatible with `atob` as described in the
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// HTML Standard. http://whatwg.org/html/webappapis.html#dom-windowbase64-atob
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// The optimized base64-decoding algorithm used is based on @atk’s excellent
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// implementation. https://gist.github.com/atk/1020396
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var decode = function(input) {
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input = String(input)
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.replace(REGEX_SPACE_CHARACTERS, '');
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var length = input.length;
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if (length % 4 == 0) {
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input = input.replace(/==?$/, '');
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length = input.length;
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}
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if (
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length % 4 == 1 ||
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// http://whatwg.org/C#alphanumeric-ascii-characters
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/[^+a-zA-Z0-9/]/.test(input)
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) {
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error(
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'Invalid character: the string to be decoded is not correctly encoded.'
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);
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}
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var bitCounter = 0;
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var bitStorage;
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var buffer;
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var output = '';
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var position = -1;
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while (++position < length) {
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buffer = TABLE.indexOf(input.charAt(position));
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bitStorage = bitCounter % 4 ? bitStorage * 64 + buffer : buffer;
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// Unless this is the first of a group of 4 characters…
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if (bitCounter++ % 4) {
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// …convert the first 8 bits to a single ASCII character.
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output += String.fromCharCode(
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0xFF & bitStorage >> (-2 * bitCounter & 6)
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);
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}
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}
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return output;
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};
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// `encode` is designed to be fully compatible with `btoa` as described in the
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// HTML Standard: http://whatwg.org/html/webappapis.html#dom-windowbase64-btoa
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var encode = function(input) {
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input = String(input);
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if (/[^\0-\xFF]/.test(input)) {
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// Note: no need to special-case astral symbols here, as surrogates are
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// matched, and the input is supposed to only contain ASCII anyway.
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error(
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'The string to be encoded contains characters outside of the ' +
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'Latin1 range.'
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);
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}
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var padding = input.length % 3;
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var output = '';
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var position = -1;
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var a;
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var b;
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var c;
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var buffer;
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// Make sure any padding is handled outside of the loop.
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var length = input.length - padding;
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while (++position < length) {
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// Read three bytes, i.e. 24 bits.
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a = input.charCodeAt(position) << 16;
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b = input.charCodeAt(++position) << 8;
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c = input.charCodeAt(++position);
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buffer = a + b + c;
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// Turn the 24 bits into four chunks of 6 bits each, and append the
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// matching character for each of them to the output.
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output += (
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TABLE.charAt(buffer >> 18 & 0x3F) +
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TABLE.charAt(buffer >> 12 & 0x3F) +
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TABLE.charAt(buffer >> 6 & 0x3F) +
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TABLE.charAt(buffer & 0x3F)
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);
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}
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if (padding == 2) {
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a = input.charCodeAt(position) << 8;
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b = input.charCodeAt(++position);
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buffer = a + b;
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output += (
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TABLE.charAt(buffer >> 10) +
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TABLE.charAt((buffer >> 4) & 0x3F) +
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TABLE.charAt((buffer << 2) & 0x3F) +
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'='
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);
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} else if (padding == 1) {
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buffer = input.charCodeAt(position);
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output += (
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TABLE.charAt(buffer >> 2) +
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TABLE.charAt((buffer << 4) & 0x3F) +
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'=='
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);
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}
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return output;
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};
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|
|
var base64 = {
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|
|
'encode': encode,
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|
|
'decode': decode,
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|
|
'version': '0.1.0'
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};
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|
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|
|
// Some AMD build optimizers, like r.js, check for specific condition patterns
|
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|
|
// like the following:
|
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|
|
if (
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|
|
typeof undefined == 'function' &&
|
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|
|
typeof undefined.amd == 'object' &&
|
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|
|
undefined.amd
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|
|
) {
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|
|
undefined(function() {
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|
|
return base64;
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|
|
|
});
|
|
|
|
} else if (freeExports && !freeExports.nodeType) {
|
|
|
|
if (freeModule) { // in Node.js or RingoJS v0.8.0+
|
|
|
|
freeModule.exports = base64;
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|
|
|
} else { // in Narwhal or RingoJS v0.7.0-
|
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|
|
for (var key in base64) {
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|
|
|
base64.hasOwnProperty(key) && (freeExports[key] = base64[key]);
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|
|
|
}
|
|
|
|
}
|
|
|
|
} else { // in Rhino or a web browser
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|
|
root.base64 = base64;
|
|
|
|
}
|
|
|
|
|
|
|
|
}(commonjsGlobal));
|
|
|
|
});
|
|
|
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|
|
function makeURI (strData, type) {
|
|
|
|
return 'data:' + type + ';base64,' + strData
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|
|
}
|
|
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|
|
function fixType (type) {
|
|
|
|
type = type.toLowerCase().replace(/jpg/i, 'jpeg');
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|
|
|
var r = type.match(/png|jpeg|bmp|gif/)[0];
|
|
|
|
return 'image/' + r
|
|
|
|
}
|
|
|
|
|
|
|
|
function encodeData (data) {
|
|
|
|
var str = '';
|
|
|
|
if (typeof data === 'string') {
|
|
|
|
str = data;
|
|
|
|
} else {
|
|
|
|
for (var i = 0; i < data.length; i++) {
|
|
|
|
str += String.fromCharCode(data[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return base64.encode(str)
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 获取图像区域隐含的像素数据
|
|
|
|
* @param canvasId canvas标识
|
|
|
|
* @param x 将要被提取的图像数据矩形区域的左上角 x 坐标
|
|
|
|
* @param y 将要被提取的图像数据矩形区域的左上角 y 坐标
|
|
|
|
* @param width 将要被提取的图像数据矩形区域的宽度
|
|
|
|
* @param height 将要被提取的图像数据矩形区域的高度
|
|
|
|
* @param done 完成回调
|
|
|
|
*/
|
|
|
|
function getImageData (canvasId, x, y, width, height, done) {
|
|
|
|
wx.canvasGetImageData({
|
|
|
|
canvasId: canvasId,
|
|
|
|
x: x,
|
|
|
|
y: y,
|
|
|
|
width: width,
|
|
|
|
height: height,
|
|
|
|
success: function success (res) {
|
|
|
|
done(res);
|
|
|
|
},
|
|
|
|
fail: function fail (res) {
|
|
|
|
done(null);
|
|
|
|
console.error('canvasGetImageData error: ' + res);
|
|
|
|
}
|
|
|
|
});
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 生成bmp格式图片
|
|
|
|
* 按照规则生成图片响应头和响应体
|
|
|
|
* @param oData 用来描述 canvas 区域隐含的像素数据 { data, width, height } = oData
|
|
|
|
* @returns {*} base64字符串
|
|
|
|
*/
|
|
|
|
function genBitmapImage (oData) {
|
|
|
|
//
|
|
|
|
// BITMAPFILEHEADER: http://msdn.microsoft.com/en-us/library/windows/desktop/dd183374(v=vs.85).aspx
|
|
|
|
// BITMAPINFOHEADER: http://msdn.microsoft.com/en-us/library/dd183376.aspx
|
|
|
|
//
|
|
|
|
var biWidth = oData.width;
|
|
|
|
var biHeight = oData.height;
|
|
|
|
var biSizeImage = biWidth * biHeight * 3;
|
|
|
|
var bfSize = biSizeImage + 54; // total header size = 54 bytes
|
|
|
|
|
|
|
|
//
|
|
|
|
// typedef struct tagBITMAPFILEHEADER {
|
|
|
|
// WORD bfType;
|
|
|
|
// DWORD bfSize;
|
|
|
|
// WORD bfReserved1;
|
|
|
|
// WORD bfReserved2;
|
|
|
|
// DWORD bfOffBits;
|
|
|
|
// } BITMAPFILEHEADER;
|
|
|
|
//
|
|
|
|
var BITMAPFILEHEADER = [
|
|
|
|
// WORD bfType -- The file type signature; must be "BM"
|
|
|
|
0x42, 0x4D,
|
|
|
|
// DWORD bfSize -- The size, in bytes, of the bitmap file
|
|
|
|
bfSize & 0xff, bfSize >> 8 & 0xff, bfSize >> 16 & 0xff, bfSize >> 24 & 0xff,
|
|
|
|
// WORD bfReserved1 -- Reserved; must be zero
|
|
|
|
0, 0,
|
|
|
|
// WORD bfReserved2 -- Reserved; must be zero
|
|
|
|
0, 0,
|
|
|
|
// DWORD bfOffBits -- The offset, in bytes, from the beginning of the BITMAPFILEHEADER structure to the bitmap bits.
|
|
|
|
54, 0, 0, 0
|
|
|
|
];
|
|
|
|
|
|
|
|
//
|
|
|
|
// typedef struct tagBITMAPINFOHEADER {
|
|
|
|
// DWORD biSize;
|
|
|
|
// LONG biWidth;
|
|
|
|
// LONG biHeight;
|
|
|
|
// WORD biPlanes;
|
|
|
|
// WORD biBitCount;
|
|
|
|
// DWORD biCompression;
|
|
|
|
// DWORD biSizeImage;
|
|
|
|
// LONG biXPelsPerMeter;
|
|
|
|
// LONG biYPelsPerMeter;
|
|
|
|
// DWORD biClrUsed;
|
|
|
|
// DWORD biClrImportant;
|
|
|
|
// } BITMAPINFOHEADER, *PBITMAPINFOHEADER;
|
|
|
|
//
|
|
|
|
var BITMAPINFOHEADER = [
|
|
|
|
// DWORD biSize -- The number of bytes required by the structure
|
|
|
|
40, 0, 0, 0,
|
|
|
|
// LONG biWidth -- The width of the bitmap, in pixels
|
|
|
|
biWidth & 0xff, biWidth >> 8 & 0xff, biWidth >> 16 & 0xff, biWidth >> 24 & 0xff,
|
|
|
|
// LONG biHeight -- The height of the bitmap, in pixels
|
|
|
|
biHeight & 0xff, biHeight >> 8 & 0xff, biHeight >> 16 & 0xff, biHeight >> 24 & 0xff,
|
|
|
|
// WORD biPlanes -- The number of planes for the target device. This value must be set to 1
|
|
|
|
1, 0,
|
|
|
|
// WORD biBitCount -- The number of bits-per-pixel, 24 bits-per-pixel -- the bitmap
|
|
|
|
// has a maximum of 2^24 colors (16777216, Truecolor)
|
|
|
|
24, 0,
|
|
|
|
// DWORD biCompression -- The type of compression, BI_RGB (code 0) -- uncompressed
|
|
|
|
0, 0, 0, 0,
|
|
|
|
// DWORD biSizeImage -- The size, in bytes, of the image. This may be set to zero for BI_RGB bitmaps
|
|
|
|
biSizeImage & 0xff, biSizeImage >> 8 & 0xff, biSizeImage >> 16 & 0xff, biSizeImage >> 24 & 0xff,
|
|
|
|
// LONG biXPelsPerMeter, unused
|
|
|
|
0, 0, 0, 0,
|
|
|
|
// LONG biYPelsPerMeter, unused
|
|
|
|
0, 0, 0, 0,
|
|
|
|
// DWORD biClrUsed, the number of color indexes of palette, unused
|
|
|
|
0, 0, 0, 0,
|
|
|
|
// DWORD biClrImportant, unused
|
|
|
|
0, 0, 0, 0
|
|
|
|
];
|
|
|
|
|
|
|
|
var iPadding = (4 - ((biWidth * 3) % 4)) % 4;
|
|
|
|
|
|
|
|
var aImgData = oData.data;
|
|
|
|
|
|
|
|
var strPixelData = '';
|
|
|
|
var biWidth4 = biWidth << 2;
|
|
|
|
var y = biHeight;
|
|
|
|
var fromCharCode = String.fromCharCode;
|
|
|
|
|
|
|
|
do {
|
|
|
|
var iOffsetY = biWidth4 * (y - 1);
|
|
|
|
var strPixelRow = '';
|
|
|
|
for (var x = 0; x < biWidth; x++) {
|
|
|
|
var iOffsetX = x << 2;
|
|
|
|
strPixelRow += fromCharCode(aImgData[iOffsetY + iOffsetX + 2]) +
|
|
|
|
fromCharCode(aImgData[iOffsetY + iOffsetX + 1]) +
|
|
|
|
fromCharCode(aImgData[iOffsetY + iOffsetX]);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (var c = 0; c < iPadding; c++) {
|
|
|
|
strPixelRow += String.fromCharCode(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
strPixelData += strPixelRow;
|
|
|
|
} while (--y)
|
|
|
|
|
|
|
|
var strEncoded = encodeData(BITMAPFILEHEADER.concat(BITMAPINFOHEADER)) + encodeData(strPixelData);
|
|
|
|
|
|
|
|
return strEncoded
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 转换为图片base64
|
|
|
|
* @param canvasId canvas标识
|
|
|
|
* @param x 将要被提取的图像数据矩形区域的左上角 x 坐标
|
|
|
|
* @param y 将要被提取的图像数据矩形区域的左上角 y 坐标
|
|
|
|
* @param width 将要被提取的图像数据矩形区域的宽度
|
|
|
|
* @param height 将要被提取的图像数据矩形区域的高度
|
|
|
|
* @param type 转换图片类型
|
|
|
|
* @param done 完成回调
|
|
|
|
*/
|
|
|
|
function convertToImage (canvasId, x, y, width, height, type, done) {
|
|
|
|
if ( done === void 0 ) done = function () {};
|
|
|
|
|
|
|
|
if (type === undefined) { type = 'png'; }
|
|
|
|
type = fixType(type);
|
|
|
|
if (/bmp/.test(type)) {
|
|
|
|
getImageData(canvasId, x, y, width, height, function (data) {
|
|
|
|
var strData = genBitmapImage(data);
|
|
|
|
isFunction(done) && done(makeURI(strData, 'image/' + type));
|
|
|
|
});
|
|
|
|
} else {
|
|
|
|
console.error('暂不支持生成\'' + type + '\'类型的base64图片');
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
var CanvasToBase64 = {
|
|
|
|
convertToImage: convertToImage,
|
|
|
|
// convertToPNG: function (width, height, done) {
|
|
|
|
// return convertToImage(width, height, 'png', done)
|
|
|
|
// },
|
|
|
|
// convertToJPEG: function (width, height, done) {
|
|
|
|
// return convertToImage(width, height, 'jpeg', done)
|
|
|
|
// },
|
|
|
|
// convertToGIF: function (width, height, done) {
|
|
|
|
// return convertToImage(width, height, 'gif', done)
|
|
|
|
// },
|
|
|
|
convertToBMP: function (ref, done) {
|
|
|
|
if ( ref === void 0 ) ref = {};
|
|
|
|
var canvasId = ref.canvasId;
|
|
|
|
var x = ref.x;
|
|
|
|
var y = ref.y;
|
|
|
|
var width = ref.width;
|
|
|
|
var height = ref.height;
|
|
|
|
if ( done === void 0 ) done = function () {};
|
|
|
|
|
|
|
|
return convertToImage(canvasId, x, y, width, height, 'bmp', done)
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
function methods () {
|
|
|
|
var self = this;
|
|
|
|
|
|
|
|
var id = self.id;
|
|
|
|
var deviceRadio = self.deviceRadio;
|
|
|
|
var boundWidth = self.width; // 裁剪框默认宽度，即整个画布宽度
|
|
|
|
var boundHeight = self.height; // 裁剪框默认高度，即整个画布高度
|
|
|
|
var ref = self.cut;
|
|
|
|
var x = ref.x; if ( x === void 0 ) x = 0;
|
|
|
|
var y = ref.y; if ( y === void 0 ) y = 0;
|
|
|
|
var width = ref.width; if ( width === void 0 ) width = boundWidth;
|
|
|
|
var height = ref.height; if ( height === void 0 ) height = boundHeight;
|
|
|
|
|
|
|
|
self.updateCanvas = function () {
|
|
|
|
if (self.croperTarget) {
|
|
|
|
// 画布绘制图片
|
|
|
|
self.ctx.drawImage(self.croperTarget, self.imgLeft, self.imgTop, self.scaleWidth, self.scaleHeight);
|
|
|
|
}
|
|
|
|
isFunction(self.onBeforeDraw) && self.onBeforeDraw(self.ctx, self);
|
|
|
|
|
|
|
|
self.setBoundStyle(); // 设置边界样式
|
|
|
|
self.ctx.draw();
|
|
|
|
return self
|
|
|
|
};
|
|
|
|
|
|
|
|
self.pushOrign = function (src) {
|
|
|
|
self.src = src;
|
|
|
|
|
|
|
|
isFunction(self.onBeforeImageLoad) && self.onBeforeImageLoad(self.ctx, self);
|
|
|
|
|
|
|
|
wx.getImageInfo({
|
|
|
|
src: src,
|
|
|
|
success: function success (res) {
|
|
|
|
var innerAspectRadio = res.width / res.height;
|
|
|
|
|
|
|
|
self.croperTarget = res.path;
|
|
|
|
|
|
|
|
if (innerAspectRadio < width / height) {
|
|
|
|
self.rectX = x;
|
|
|
|
self.baseWidth = width;
|
|
|
|
self.baseHeight = width / innerAspectRadio;
|
|
|
|
self.rectY = y - Math.abs((height - self.baseHeight) / 2);
|
|
|
|
} else {
|
|
|
|
self.rectY = y;
|
|
|
|
self.baseWidth = height * innerAspectRadio;
|
|
|
|
self.baseHeight = height;
|
|
|
|
self.rectX = x - Math.abs((width - self.baseWidth) / 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
self.imgLeft = self.rectX;
|
|
|
|
self.imgTop = self.rectY;
|
|
|
|
self.scaleWidth = self.baseWidth;
|
|
|
|
self.scaleHeight = self.baseHeight;
|
|
|
|
|
|
|
|
self.updateCanvas();
|
|
|
|
|
|
|
|
isFunction(self.onImageLoad) && self.onImageLoad(self.ctx, self);
|
|
|
|
}
|
|
|
|
});
|
|
|
|
|
|
|
|
self.update();
|
|
|
|
return self
|
|
|
|
};
|
|
|
|
|
|
|
|
self.getCropperBase64 = function (done) {
|
|
|
|
if ( done === void 0 ) done = function () {};
|
|
|
|
|
|
|
|
CanvasToBase64.convertToBMP({
|
|
|
|
canvasId: id,
|
|
|
|
x: x,
|
|
|
|
y: y,
|
|
|
|
width: width,
|
|
|
|
height: height
|
|
|
|
}, done);
|
|
|
|
};
|
|
|
|
|
|
|
|
self.getCropperImage = function () {
|
|
|
|
var args = [], len = arguments.length;
|
|
|
|
while ( len-- ) args[ len ] = arguments[ len ];
|
|
|
|
|
|
|
|
var ARG_TYPE = toString.call(args[0]);
|
|
|
|
var fn = args[args.length - 1];
|
|
|
|
|
|
|
|
switch (ARG_TYPE) {
|
|
|
|
case '[object Object]':
|
|
|
|
var ref = args[0];
|
|
|
|
var quality = ref.quality; if ( quality === void 0 ) quality = 10;
|
|
|
|
|
|
|
|
if (typeof (quality) !== 'number') {
|
|
|
|
console.error(("quality：" + quality + " is invalid"));
|
|
|
|
} else if (quality < 0 || quality > 10) {
|
|
|
|
console.error("quality should be ranged in 0 ~ 10");
|
|
|
|
}
|
|
|
|
wx.canvasToTempFilePath({
|
|
|
|
canvasId: id,
|
|
|
|
x: x,
|
|
|
|
y: y,
|
|
|
|
width: width,
|
|
|
|
height: height,
|
|
|
|
destWidth: width * quality / (deviceRadio * 10),
|
|
|
|
destHeight: height * quality / (deviceRadio * 10),
|
|
|
|
success: function success (res) {
|
|
|
|
isFunction(fn) && fn.call(self, res.tempFilePath);
|
|
|
|
},
|
|
|
|
fail: function fail (res) {
|
|
|
|
isFunction(fn) && fn.call(self, null);
|
|
|
|
}
|
|
|
|
}); break
|
|
|
|
case '[object Function]':
|
|
|
|
wx.canvasToTempFilePath({
|
|
|
|
canvasId: id,
|
|
|
|
x: x,
|
|
|
|
y: y,
|
|
|
|
width: width,
|
|
|
|
height: height,
|
|
|
|
destWidth: width / deviceRadio,
|
|
|
|
destHeight: height / deviceRadio,
|
|
|
|
success: function success (res) {
|
|
|
|
isFunction(fn) && fn.call(self, res.tempFilePath);
|
|
|
|
},
|
|
|
|
fail: function fail (res) {
|
|
|
|
isFunction(fn) && fn.call(self, null);
|
|
|
|
}
|
|
|
|
}); break
|
|
|
|
}
|
|
|
|
|
|
|
|
return self
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 获取最新缩放值
|
|
|
|
* @param oldScale 上一次触摸结束后的缩放值
|
|
|
|
* @param oldDistance 上一次触摸结束后的双指距离
|
|
|
|
* @param zoom 缩放系数
|
|
|
|
* @param touch0 第一指touch对象
|
|
|
|
* @param touch1 第二指touch对象
|
|
|
|
* @returns {*}
|
|
|
|
*/
|
|
|
|
var getNewScale = function (oldScale, oldDistance, zoom, touch0, touch1) {
|
|
|
|
var xMove, yMove, newDistance;
|
|
|
|
// 计算二指最新距离
|
|
|
|
xMove = Math.round(touch1.x - touch0.x);
|
|
|
|
yMove = Math.round(touch1.y - touch0.y);
|
|
|
|
newDistance = Math.round(Math.sqrt(xMove * xMove + yMove * yMove));
|
|
|
|
|
|
|
|
return oldScale + 0.001 * zoom * (newDistance - oldDistance)
|
|
|
|
};
|
|
|
|
|
|
|
|
function update () {
|
|
|
|
var self = this;
|
|
|
|
|
|
|
|
if (!self.src) { return }
|
|
|
|
|
|
|
|
self.__oneTouchStart = function (touch) {
|
|
|
|
self.touchX0 = Math.round(touch.x);
|
|
|
|
self.touchY0 = Math.round(touch.y);
|
|
|
|
};
|
|
|
|
|
|
|
|
self.__oneTouchMove = function (touch) {
|
|
|
|
var xMove, yMove;
|
|
|
|
// 计算单指移动的距离
|
|
|
|
if (self.touchended) {
|
|
|
|
return self.updateCanvas()
|
|
|
|
}
|
|
|
|
xMove = Math.round(touch.x - self.touchX0);
|
|
|
|
yMove = Math.round(touch.y - self.touchY0);
|
|
|
|
|
|
|
|
var imgLeft = Math.round(self.rectX + xMove);
|
|
|
|
var imgTop = Math.round(self.rectY + yMove);
|
|
|
|
|
|
|
|
self.outsideBound(imgLeft, imgTop);
|
|
|
|
|
|
|
|
self.updateCanvas();
|
|
|
|
};
|
|
|
|
|
|
|
|
self.__twoTouchStart = function (touch0, touch1) {
|
|
|
|
var xMove, yMove, oldDistance;
|
|
|
|
|
|
|
|
self.touchX1 = Math.round(self.rectX + self.scaleWidth / 2);
|
|
|
|
self.touchY1 = Math.round(self.rectY + self.scaleHeight / 2);
|
|
|
|
|
|
|
|
// 计算两指距离
|
|
|
|
xMove = Math.round(touch1.x - touch0.x);
|
|
|
|
yMove = Math.round(touch1.y - touch0.y);
|
|
|
|
oldDistance = Math.round(Math.sqrt(xMove * xMove + yMove * yMove));
|
|
|
|
|
|
|
|
self.oldDistance = oldDistance;
|
|
|
|
};
|
|
|
|
|
|
|
|
self.__twoTouchMove = function (touch0, touch1) {
|
|
|
|
var oldScale = self.oldScale;
|
|
|
|
var oldDistance = self.oldDistance;
|
|
|
|
var scale = self.scale;
|
|
|
|
var zoom = self.zoom;
|
|
|
|
|
|
|
|
self.newScale = getNewScale(oldScale, oldDistance, zoom, touch0, touch1);
|
|
|
|
|
|
|
|
// 设定缩放范围
|
|
|
|
self.newScale <= 1 && (self.newScale = 1);
|
|
|
|
self.newScale >= scale && (self.newScale = scale);
|
|
|
|
|
|
|
|
self.scaleWidth = Math.round(self.newScale * self.baseWidth);
|
|
|
|
self.scaleHeight = Math.round(self.newScale * self.baseHeight);
|
|
|
|
var imgLeft = Math.round(self.touchX1 - self.scaleWidth / 2);
|
|
|
|
var imgTop = Math.round(self.touchY1 - self.scaleHeight / 2);
|
|
|
|
|
|
|
|
self.outsideBound(imgLeft, imgTop);
|
|
|
|
|
|
|
|
self.updateCanvas();
|
|
|
|
};
|
|
|
|
|
|
|
|
self.__xtouchEnd = function () {
|
|
|
|
self.oldScale = self.newScale;
|
|
|
|
self.rectX = self.imgLeft;
|
|
|
|
self.rectY = self.imgTop;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
var handle = {
|
|
|
|
// 图片手势初始监测
|
|
|
|
touchStart: function touchStart (e) {
|
|
|
|
var self = this;
|
|
|
|
var ref = e.touches;
|
|
|
|
var touch0 = ref[0];
|
|
|
|
var touch1 = ref[1];
|
|
|
|
|
|
|
|
setTouchState(self, true, null, null);
|
|
|
|
|
|
|
|
// 计算第一个触摸点的位置，并参照改点进行缩放
|
|
|
|
self.__oneTouchStart(touch0);
|
|
|
|
|
|
|
|
// 两指手势触发
|
|
|
|
if (e.touches.length >= 2) {
|
|
|
|
self.__twoTouchStart(touch0, touch1);
|
|
|
|
}
|
|
|
|
},
|
|
|
|
|
|
|
|
// 图片手势动态缩放
|
|
|
|
touchMove: function touchMove (e) {
|
|
|
|
var self = this;
|
|
|
|
var ref = e.touches;
|
|
|
|
var touch0 = ref[0];
|
|
|
|
var touch1 = ref[1];
|
|
|
|
|
|
|
|
setTouchState(self, null, true);
|
|
|
|
|
|
|
|
// 单指手势时触发
|
|
|
|
if (e.touches.length === 1) {
|
|
|
|
self.__oneTouchMove(touch0);
|
|
|
|
}
|
|
|
|
// 两指手势触发
|
|
|
|
if (e.touches.length >= 2) {
|
|
|
|
self.__twoTouchMove(touch0, touch1);
|
|
|
|
}
|
|
|
|
},
|
|
|
|
|
|
|
|
touchEnd: function touchEnd (e) {
|
|
|
|
var self = this;
|
|
|
|
|
|
|
|
setTouchState(self, false, false, true);
|
|
|
|
self.__xtouchEnd();
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
function cut () {
|
|
|
|
var self = this;
|
|
|
|
var boundWidth = self.width; // 裁剪框默认宽度，即整个画布宽度
|
|
|
|
var boundHeight = self.height;
|
|
|
|
// 裁剪框默认高度，即整个画布高度
|
|
|
|
var ref = self.cut;
|
|
|
|
var x = ref.x; if ( x === void 0 ) x = 0;
|
|
|
|
var y = ref.y; if ( y === void 0 ) y = 0;
|
|
|
|
var width = ref.width; if ( width === void 0 ) width = boundWidth;
|
|
|
|
var height = ref.height; if ( height === void 0 ) height = boundHeight;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 设置边界
|
|
|
|
* @param imgLeft 图片左上角横坐标值
|
|
|
|
* @param imgTop 图片左上角纵坐标值
|
|
|
|
*/
|
|
|
|
self.outsideBound = function (imgLeft, imgTop) {
|
|
|
|
self.imgLeft = imgLeft >= x
|
|
|
|
? x
|
|
|
|
: self.scaleWidth + imgLeft - x <= width
|
|
|
|
? x + width - self.scaleWidth
|
|
|
|
: imgLeft;
|
|
|
|
|
|
|
|
self.imgTop = imgTop >= y
|
|
|
|
? y
|
|
|
|
: self.scaleHeight + imgTop - y <= height
|
|
|
|
? y + height - self.scaleHeight
|
|
|
|
: imgTop;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 设置边界样式
|
|
|
|
* @param color 边界颜色
|
|
|
|
*/
|
|
|
|
self.setBoundStyle = function (ref) {
|
|
|
|
if ( ref === void 0 ) ref = {};
|
|
|
|
var color = ref.color; if ( color === void 0 ) color = '#04b00f';
|
|
|
|
var mask = ref.mask; if ( mask === void 0 ) mask = 'rgba(0, 0, 0, 0.3)';
|
|
|
|
var lineWidth = ref.lineWidth; if ( lineWidth === void 0 ) lineWidth = 1;
|
|
|
|
|
|
|
|
var boundOption = [
|
|
|
|
{
|
|
|
|
start: { x: x - lineWidth, y: y + 10 - lineWidth },
|
|
|
|
step1: { x: x - lineWidth, y: y - lineWidth },
|
|
|
|
step2: { x: x + 10 - lineWidth, y: y - lineWidth }
|
|
|
|
},
|
|
|
|
{
|
|
|
|
start: { x: x - lineWidth, y: y + height - 10 + lineWidth },
|
|
|
|
step1: { x: x - lineWidth, y: y + height + lineWidth },
|
|
|
|
step2: { x: x + 10 - lineWidth, y: y + height + lineWidth }
|
|
|
|
},
|
|
|
|
{
|
|
|
|
start: { x: x + width - 10 + lineWidth, y: y - lineWidth },
|
|
|
|
step1: { x: x + width + lineWidth, y: y - lineWidth },
|
|
|
|
step2: { x: x + width + lineWidth, y: y + 10 - lineWidth }
|
|
|
|
},
|
|
|
|
{
|
|
|
|
start: { x: x + width + lineWidth, y: y + height - 10 + lineWidth },
|
|
|
|
step1: { x: x + width + lineWidth, y: y + height + lineWidth },
|
|
|
|
step2: { x: x + width - 10 + lineWidth, y: y + height + lineWidth }
|
|
|
|
}
|
|
|
|
];
|
|
|
|
|
|
|
|
// 绘制半透明层
|
|
|
|
self.ctx.beginPath();
|
|
|
|
self.ctx.setFillStyle(mask);
|
|
|
|
self.ctx.fillRect(0, 0, x, boundHeight);
|
|
|
|
self.ctx.fillRect(x, 0, width, y);
|
|
|
|
self.ctx.fillRect(x, y + height, width, boundHeight - y - height);
|
|
|
|
self.ctx.fillRect(x + width, 0, boundWidth - x - width, boundHeight);
|
|
|
|
self.ctx.fill();
|
|
|
|
|
|
|
|
boundOption.forEach(function (op) {
|
|
|
|
self.ctx.beginPath();
|
|
|
|
self.ctx.setStrokeStyle(color);
|
|
|
|
self.ctx.setLineWidth(lineWidth);
|
|
|
|
self.ctx.moveTo(op.start.x, op.start.y);
|
|
|
|
self.ctx.lineTo(op.step1.x, op.step1.y);
|
|
|
|
self.ctx.lineTo(op.step2.x, op.step2.y);
|
|
|
|
self.ctx.stroke();
|
|
|
|
});
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
var version = "1.2.0";
|
|
|
|
|
|
|
|
var WeCropper = function WeCropper (params) {
|
|
|
|
var self = this;
|
|
|
|
var _default = {};
|
|
|
|
|
|
|
|
validator(self, DEFAULT);
|
|
|
|
|
|
|
|
Object.keys(DEFAULT).forEach(function (key) {
|
|
|
|
_default[key] = DEFAULT[key].default;
|
|
|
|
});
|
|
|
|
Object.assign(self, _default, params);
|
|
|
|
|
|
|
|
self.prepare();
|
|
|
|
self.attachPage();
|
|
|
|
self.createCtx();
|
|
|
|
self.observer();
|
|
|
|
self.cutt();
|
|
|
|
self.methods();
|
|
|
|
self.init();
|
|
|
|
self.update();
|
|
|
|
|
|
|
|
return self
|
|
|
|
};
|
|
|
|
|
|
|
|
WeCropper.prototype.init = function init () {
|
|
|
|
var self = this;
|
|
|
|
var src = self.src;
|
|
|
|
|
|
|
|
self.version = version;
|
|
|
|
|
|
|
|
typeof self.onReady === 'function' && self.onReady(self.ctx, self);
|
|
|
|
|
|
|
|
if (src) {
|
|
|
|
self.pushOrign(src);
|
|
|
|
}
|
|
|
|
setTouchState(self, false, false, false);
|
|
|
|
|
|
|
|
self.oldScale = 1;
|
|
|
|
self.newScale = 1;
|
|
|
|
|
|
|
|
return self
|
|
|
|
};
|
|
|
|
|
|
|
|
Object.assign(WeCropper.prototype, handle);
|
|
|
|
|
|
|
|
WeCropper.prototype.prepare = prepare;
|
|
|
|
WeCropper.prototype.observer = observer;
|
|
|
|
WeCropper.prototype.methods = methods;
|
|
|
|
WeCropper.prototype.cutt = cut;
|
|
|
|
WeCropper.prototype.update = update;
|
|
|
|
|
|
|
|
return WeCropper;
|
|
|
|
|
|
|
|
}))); |
...
|
...
|
|
