forked from mirrors/gecko-dev
c11ddf3017
These methods do not appear to be used. When JSM global sharing is enabled, these methods contaminate the global Function.prototype, which breaks Marionette object serialization. MozReview-Commit-ID: CAfJ2FCkhlK --HG-- extra : rebase_source : 38acb4616ee14283d0f67e1b2144972c7d139f84
50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
# This Source Code Form is subject to the terms of the Mozilla Public
|
|
# License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
|
|
/**
|
|
* lang.js - Some missing JavaScript language features
|
|
*/
|
|
|
|
/**
|
|
* Partially applies a function to a particular "this object" and zero or
|
|
* more arguments. The result is a new function with some arguments of the first
|
|
* function pre-filled and the value of |this| "pre-specified".
|
|
*
|
|
* Remaining arguments specified at call-time are appended to the pre-
|
|
* specified ones.
|
|
*
|
|
* Usage:
|
|
* var barMethBound = BindToObject(myFunction, myObj, "arg1", "arg2");
|
|
* barMethBound("arg3", "arg4");
|
|
*
|
|
* @param fn {string} Reference to the function to be bound
|
|
*
|
|
* @param self {object} Specifies the object which |this| should point to
|
|
* when the function is run. If the value is null or undefined, it will default
|
|
* to the global object.
|
|
*
|
|
* @returns {function} A partially-applied form of the speficied function.
|
|
*/
|
|
this.BindToObject = function BindToObject(fn, self, opt_args) {
|
|
var boundargs = fn.boundArgs_ || [];
|
|
boundargs = boundargs.concat(Array.slice(arguments, 2, arguments.length));
|
|
|
|
if (fn.boundSelf_)
|
|
self = fn.boundSelf_;
|
|
if (fn.boundFn_)
|
|
fn = fn.boundFn_;
|
|
|
|
var newfn = function() {
|
|
// Combine the static args and the new args into one big array
|
|
var args = boundargs.concat(Array.slice(arguments));
|
|
return fn.apply(self, args);
|
|
}
|
|
|
|
newfn.boundArgs_ = boundargs;
|
|
newfn.boundSelf_ = self;
|
|
newfn.boundFn_ = fn;
|
|
|
|
return newfn;
|
|
}
|