1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | 1× 1× 1× 1× 1× 1× | // proxy-observe // // Copyright (c) 2015 Simon Y. Blackwell, AnyWhichWay // MIT License - http://opensource.org/licenses/mit-license.php (function() { "use strict"; function Observer(target,callback,acceptlist) { var me = this; function deliver() { if(me.changeset.length>0) { console.log(acceptlist,me.changeset); var changes = me.changeset.filter(function(change) { return !acceptlist || acceptlist.indexOf(change.type)>=0; }); if(changes.length>0) { callback(changes); } me.changeset = []; } setTimeout(deliver,0); } me.target = target; me.changeset = []; if(!target.__observerCallbacks__) { Object.defineProperty(target,"__observerCallbacks__",{enumerable:false,configurable:true,writable:false,value:[]}); Object.defineProperty(target,"__observers__",{enumerable:false,configurable:true,writable:false,value:[]}); } target.__observerCallbacks__.push(callback); target.__observers__.push(this); var proxy = new Proxy(target,me); deliver(); return proxy; } Iif(!Object.observe && typeof(Proxy)==="function") { Observer.prototype.get = function(target, property) { if(property==="__observer__") { return this; } return target[property]; } Observer.prototype.set = function(target, property, value) { // , receiver var oldvalue = target[property]; var type = (oldvalue===undefined ? "add" : "update"); target[property] = value; if(!this.acceptlist || this.acceptlist.indexOf(type)>=0) { var change = {object:this.proxy,name:property,type:type}; if(type==="update") { change.oldValue = oldvalue; } this.changeset.push(change); } return true; }; Observer.prototype.deleteProperty = function(target, property) { var oldvalue = target[property]; delete target[property]; if(!this.acceptlist || this.acceptlist.indexOf("delete")>=0) { var change = {object:this.proxy,name:property,type:"delete",oldValue:oldvalue}; this.changeset.push(change); } return true; }; Observer.prototype.defineProperty = function(target, property, descriptor) { Object.defineProperty(target, property, descriptor); if(!this.acceptlist || this.acceptlist.indexOf("reconfigure")>=0) { var change = {object:this.proxy,name:property,type:"reconfigure"}; this.changeset.push(change); } return true; }; Observer.prototype.setProtoypeOf = function(target, prototype) { var oldvalue = Object.getPrototypeOf(target); Object.setPrototypeOf(target, prototype); if(!this.acceptlist || this.acceptlist.indexOf("setProtoype")>=0) { var change = {object:this.proxy,name:"__proto__",type:"setProtoype",oldValue:oldvalue}; this.changeset.push(change); } return true; }; Observer.prototype.preventExtensions = function(target) { //var oldvalue = Object.getPrototypeOf(target); Object.preventExtensions(target); if(!this.acceptlist || this.acceptlist.indexOf("preventExtensions")>=0) { var change = {object:this.proxy,type:"preventExtensions"}; this.changeset.push(change); } return true; }; Object.observe = function(object,callback,acceptlist) { return new Observer(object,callback,acceptlist); }; Object.unobserve = function(object,callback) { if(object.__observerCallbacks__) { object.__observerCallbacks__.forEach(function(observercallback,i) { if(callback===observercallback) { object.__observerCallbacks__.splice(i,1); delete object.__observers__[i].callback; object.__observers__.splice(i,1); } }); } }; Array.observe = function(object,callback,acceptlist) { var proxy = Object.observe(object,function(changeset) { var changes = changeset.filter(function(change) { return change.name!=="length" && change.name!=="add" && (!acceptlist || acceptlist.indexOf(change.type)>=0); }); if(changes.length>0) { callback(changes); } },acceptlist); var oldsplice = object.splice; proxy.splice = function(start,end) { var removed = this.slice(start,end); var addedCount = arguments.length - 1; var change = {object:proxy,type:"splice",index:start,removed:removed,addedCount:addedCount}; oldsplice.apply(this,arguments); if(acceptlist.indexOf("splice")>=0) { proxy.__observer__.changeset.push(change); } }; object.splice.oldsplice = oldsplice; var oldpush = object.push; proxy.push = function(item) { return this.splice(this.length-1,0,item); }; object.push.oldpush = oldpush; var oldpop = object.pop; proxy.pop = function() { return this.splice(this.length-1,1); }; object.pop.oldpop = oldpop; var oldunshift = object.unshift; proxy.unshift = function(item) { return this.splice(0,0,item); }; object.unshift.oldunshift = oldunshift; var oldshift = object.shift; proxy.shift = function() { return this.splice(0,1); }; object.shift.oldshift = oldshift; return proxy; }; //Array.unobserve(object,callback) { // // } } Object.deepObserve = function(object,callback,parts) { parts = (parts ? parts : []); var keys = Object.keys(object); object = Object.observe(object,function(changeset) { var changes = []; function recurse(name,rootObject,oldObject,newObject,path) { if(newObject instanceof Object) { var newkeys = Object.keys(newObject); newkeys.forEach(function(key) { if(!oldObject || (oldObject[key]!==newObject[key])) { var oldvalue = (oldObject && oldObject[key]!==undefined ? oldObject[key] : undefined); var change = (oldvalue===undefined ? "add" : "update"); var keypath = path + "." + key; changes.push({name:name,object:rootObject,type:change,oldValue:oldvalue,newValue:newObject[key],keypath:keypath}); recurse(name,rootObject,oldvalue,newObject[key],keypath); } }); } else if(oldObject instanceof Object) { var oldkeys = Object.keys(oldObject); oldkeys.forEach(function(key) { var change = (newObject===null ? "update" : "delete"); var keypath = path + "." + key; changes.push({name:name,object:rootObject,type:change,oldValue:oldObject[key],newValue:newObject,keypath:keypath}); recurse(name,rootObject,oldObject[key],undefined,keypath); }); } } changeset.forEach(function(change) { var keypath = (parts.length>0 ? parts.join(".") + "." : "") + change.name; changes.push({name:change.name,object:change.object,type:change.type,oldValue:change.oldValue,newValue:change.object[change.name],keypath:keypath}); recurse(change.name,change.object,change.oldValue,change.object[change.name],keypath); }); callback(changes); }); keys.forEach(function(key) { if(object[key] instanceof Object) { var newparts = parts.slice(0); newparts.push(key); Object.deepObserve(object[key],callback,newparts); } }); return object; }; })(); |