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6 lines
25 KiB
6 lines
25 KiB
4 years ago
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// Rivets.js + Sightglass.js
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// version: 0.9.3
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// author: Michael Richards
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// license: MIT
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(function(){function t(t,s,i,h){return new e(t,s,i,h)}function e(t,e,i,h){this.options=h||{},this.options.adapters=this.options.adapters||{},this.obj=t,this.keypath=e,this.callback=i,this.objectPath=[],this.update=this.update.bind(this),this.parse(),s(this.target=this.realize())&&this.set(!0,this.key,this.target,this.callback)}function s(t){return"object"==typeof t&&null!==t}function i(t){throw new Error("[sightglass] "+t)}t.adapters={},e.tokenize=function(t,e,s){var i,h,a=[],o={i:s,path:""};for(i=0;i<t.length;i++)h=t.charAt(i),~e.indexOf(h)?(a.push(o),o={i:h,path:""}):o.path+=h;return a.push(o),a},e.prototype.parse=function(){var s,h,a=this.interfaces();a.length||i("Must define at least one adapter interface."),~a.indexOf(this.keypath[0])?(s=this.keypath[0],h=this.keypath.substr(1)):("undefined"==typeof(s=this.options.root||t.root)&&i("Must define a default root adapter."),h=this.keypath),this.tokens=e.tokenize(h,a,s),this.key=this.tokens.pop()},e.prototype.realize=function(){var t,e=this.obj,i=!1;return this.tokens.forEach(function(h,a){s(e)?("undefined"!=typeof this.objectPath[a]?e!==(t=this.objectPath[a])&&(this.set(!1,h,t,this.update),this.set(!0,h,e,this.update),this.objectPath[a]=e):(this.set(!0,h,e,this.update),this.objectPath[a]=e),e=this.get(h,e)):(i===!1&&(i=a),(t=this.objectPath[a])&&this.set(!1,h,t,this.update))},this),i!==!1&&this.objectPath.splice(i),e},e.prototype.update=function(){var t,e;(t=this.realize())!==this.target&&(s(this.target)&&this.set(!1,this.key,this.target,this.callback),s(t)&&this.set(!0,this.key,t,this.callback),e=this.value(),this.target=t,(this.value()instanceof Function||this.value()!==e)&&this.callback())},e.prototype.value=function(){return s(this.target)?this.get(this.key,this.target):void 0},e.prototype.setValue=function(t){s(this.target)&&this.adapter(this.key).set(this.target,this.key.path,t)},e.prototype.get=function(t,e){return this.adapter(t).get(e,t.path)},e.prototype.set=function(t,e,s,i){var h=t?"observe":"unobserve";this.adapter(e)[h](s,e.path,i)},e.prototype.interfaces=function(){var e=Object.keys(this.options.adapters);return Object.keys(t.adapters).forEach(function(t){~e.indexOf(t)||e.push(t)}),e},e.prototype.adapter=function(e){return this.options.adapters[e.i]||t.adapters[e.i]},e.prototype.unobserve=function(){var t;this.tokens.forEach(function(e,s){(t=this.objectPath[s])&&this.set(!1,e,t,this.update)},this),s(this.target)&&this.set(!1,this.key,this.target,this.callback)},"undefined"!=typeof module&&module.exports?module.exports=t:"function"==typeof define&&define.amd?define([],function(){return this.sightglass=t}):this.sightglass=t}).call(this);
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