Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/18715/119137/Hooks.js
// ==UserScript==
// @name Hooks
// @namespace [email protected]
// @description A JavaScript hook/proxy/reflect ultility
// @author xymopen
// @version 1.1.0
// @grant none
// @license BSD 2-Clause
// @homepageURL https://github.com/xymopen/JS_Utilities/blob/master/Hooks.js
// @updateURL https://raw.githubusercontent.com/xymopen/JS_Utilities/master/Hooks.js
// ==/UserScript==
// TODO: JsDoc
var Hooks = ( function() {
"use strict";
var Hooks = {
"apply": function apply( target, onApply ) {
return function() {
return onApply.call( this, target, this, arguments );
};
},
"property": function get( target, propertyName, onGet, onSet ) {
var descriptor, oldValue;
if ( Object.prototype.hasOwnProperty.call( target, propertyName ) ) {
descriptor = Object.getOwnPropertyDescriptor( target, propertyName );
if ( Object.prototype.hasOwnProperty.call( descriptor, "value" ) ) {
oldValue = descriptor.value;
delete descriptor.value;
delete descriptor.writable;
} else if ( Object.prototype.hasOwnProperty.call( descriptor, "get" ) ) {
oldValue = descriptor.get.call( target );
} else {
oldValue = undefined;
}
descriptor.get = function get() {
return onGet.call( this, target, propertyName, oldValue );
};
descriptor.set = function set( newValue ) {
oldValue = onSet.call( this, target, propertyName, oldValue, newValue );
return oldValue;
};
Object.defineProperty( target, propertyName, descriptor );
} else {
throw new Error( "ERR_PROPERTY_NOT_DEFINED" );
}
},
"get": function get( target, propertyName, onGet ) {
return Hooks.property( target, propertyName, onGet, function( target, propertyName, oldValue, newValue ) {
return newValue;
} );
},
"set": function set( target, propertyName, onSet ) {
return Hooks.property( target, propertyName, function( target, propertyName, oldValue ) {
return oldValue;
}, onSet );
},
"getter": function getter( target, propertyName, onGetter ) {
var descriptor, getter;
if ( Object.prototype.hasOwnProperty.call( target, propertyName ) ) {
descriptor = Object.getOwnPropertyDescriptor( target, propertyName );
getter = descriptor.get;
if ( Object.prototype.hasOwnProperty.call( descriptor, "get" ) &&
"function" === typeof getter ) {
descriptor.get = Hooks.apply( getter, function( getter, thisArg, argv ) {
return onGetter.call( this, target, propertyName, getter, thisArg, argv );
} );
} else {
throw new Error( "ERR_NOT_A_GETTER" );
}
Object.defineProperty( target, propertyName, descriptor );
} else {
throw new Error( "ERR_PROPERTY_NOT_DEFINED" );
}
},
"setter": function setter( target, propertyName, onSetter ) {
var descriptor, setter; // variable setter refers to setter( target, propertyName, onSetter ) itself
if ( Object.prototype.hasOwnProperty.call( target, propertyName ) ) {
descriptor = Object.getOwnPropertyDescriptor( target, propertyName );
setter = descriptor.set;
if ( Object.prototype.hasOwnProperty.call( descriptor, "set" ) &&
"function" === typeof setter ) {
descriptor.set = Hooks.apply( setter, function( setter, thisArg, argv ) {
return onSetter.call( this, target, propertyName, setter, thisArg, argv );
} );
} else {
throw new Error( "ERR_NOT_A_SETTER" );
}
Object.defineProperty( target, propertyName, descriptor );
} else {
throw new Error( "ERR_PROPERTY_NOT_DEFINED" );
}
},
"method": function method( target, methodName, onApply ) {
var method;
if ( Object.prototype.hasOwnProperty.call( target, methodName ) ) {
method = target[ methodName ];
if ( "function" === typeof method ) {
target[ methodName ] = Hooks.apply( method, function( method, thisArg, argv ) {
return onApply.call( this, target, methodName, method, thisArg, argv );
} );
} else {
throw new Error( "ERR_NOT_A_METHOD" );
}
} else {
throw new Error( "ERR_PROPERTY_NOT_DEFINED" );
}
}
};
return Hooks;
} )();
