/**
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* mixins 为 Page 增加 mixin 功能
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* 来源:https://segmentfault.com/a/1190000019527762
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*/
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const originPage = Page;
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const originProperties = ['data', 'properties', 'options'];
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const originMethods = ['onLoad', 'onReady', 'onShow', 'onHide', 'onUnload', 'onPullDownRefresh', 'onReachBottom', 'onShareAppMessage', 'onPageScroll', 'onTabItemTap'];
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function merge (mixins, options) {
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mixins.forEach((mixin) => {
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if (Object.prototype.toString.call(mixin) !== '[object Object]') {
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throw new Error('mixin 类型必须为对象!')
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}
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for (let [key, value] of Object.entries(mixin)) {
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if (originProperties.includes(key)) {
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options[key] = { ...value, ...options[key] }
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} else if (originMethods.includes(key)) {
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const originFunc = options[key];
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options[key] = function (...args) {
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value.call(this, ...args);
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return originFunc && originFunc.call(this, ...args)
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}
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} else {
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options = { ...mixin, ...options }
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}
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}
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});
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return options
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}
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Page = (options) => {
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const mixins = options.mixins;
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if (Array.isArray(mixins)) {
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delete options.mixins;
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options = merge(mixins, options)
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}
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originPage(options)
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};
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