| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| global.Proxy = new $Object(); |
| |
| var $Proxy = global.Proxy |
| |
| var fundamentalTraps = [ |
| "getOwnPropertyDescriptor", |
| "getPropertyDescriptor", |
| "getOwnPropertyNames", |
| "getPropertyNames", |
| "defineProperty", |
| "delete", |
| "fix", |
| ] |
| |
| var derivedTraps = [ |
| "has", |
| "hasOwn", |
| "get", |
| "set", |
| "enumerate", |
| "keys", |
| ] |
| |
| var functionTraps = [ |
| "callTrap", |
| "constructTrap", |
| ] |
| |
| $Proxy.createFunction = function(handler, callTrap, constructTrap) { |
| handler.callTrap = callTrap |
| handler.constructTrap = constructTrap |
| $Proxy.create(handler) |
| } |
| |
| $Proxy.create = function(handler, proto) { |
| if (!IS_SPEC_OBJECT(handler)) |
| throw MakeTypeError("handler_non_object", ["create"]) |
| if (!IS_SPEC_OBJECT(proto)) proto = null // Mozilla does this... |
| return %CreateJSProxy(handler, proto) |
| } |
| |
| |
| |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Builtins |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| function DerivedGetTrap(receiver, name) { |
| var desc = this.getPropertyDescriptor(name) |
| if (IS_UNDEFINED(desc)) { return desc } |
| if ('value' in desc) { |
| return desc.value |
| } else { |
| if (IS_UNDEFINED(desc.get)) { return desc.get } |
| // The proposal says: desc.get.call(receiver) |
| return %_CallFunction(receiver, desc.get) |
| } |
| } |
| |
| function DerivedSetTrap(receiver, name, val) { |
| var desc = this.getOwnPropertyDescriptor(name) |
| if (desc) { |
| if ('writable' in desc) { |
| if (desc.writable) { |
| desc.value = val |
| this.defineProperty(name, desc) |
| return true |
| } else { |
| return false |
| } |
| } else { // accessor |
| if (desc.set) { |
| // The proposal says: desc.set.call(receiver, val) |
| %_CallFunction(receiver, val, desc.set) |
| return true |
| } else { |
| return false |
| } |
| } |
| } |
| desc = this.getPropertyDescriptor(name) |
| if (desc) { |
| if ('writable' in desc) { |
| if (desc.writable) { |
| // fall through |
| } else { |
| return false |
| } |
| } else { // accessor |
| if (desc.set) { |
| // The proposal says: desc.set.call(receiver, val) |
| %_CallFunction(receiver, val, desc.set) |
| return true |
| } else { |
| return false |
| } |
| } |
| } |
| this.defineProperty(name, { |
| value: val, |
| writable: true, |
| enumerable: true, |
| configurable: true}); |
| return true; |
| } |
| |
| function DerivedHasTrap(name) { |
| return !!this.getPropertyDescriptor(name) |
| } |
| |
| function DerivedKeysTrap() { |
| var names = this.getOwnPropertyNames() |
| var enumerableNames = [] |
| for (var i = 0, count = 0; i < names.length; ++i) { |
| var name = names[i] |
| if (this.getOwnPropertyDescriptor(TO_STRING_INLINE(name)).enumerable) { |
| enumerableNames[count++] = names[i] |
| } |
| } |
| return enumerableNames |
| } |