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34 lines
1.6 KiB
JavaScript
34 lines
1.6 KiB
JavaScript
/*
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* Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
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* http://paperjs.org/
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*
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* Copyright (c) 2011 - 2019, Juerg Lehni & Jonathan Puckey
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* http://scratchdisk.com/ & https://puckey.studio/
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*
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* Distributed under the MIT license. See LICENSE file for details.
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*
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* All rights reserved.
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*/
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// Here we only make sure that there's a window and document object in the node
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// environment. We can't do this directly in src/paper.js, due to the nature of
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// how Prepro.js loads the include() files in the various scenarios. E.g. on
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// Node.js,only the files included in such a way see each other's variables in
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// their shared scope.
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// Set up a local `window` variable valid across the full the paper.js scope,
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// pointing to the native window in browsers and the one provided by JSDom in
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// Node.js
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// In workers and on Node.js, the global `window` variable is null. In workers,
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// `self` is defined as a `WorkerGlobalScope` object, while in Node.js, `self`
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// is null.
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// When `self` is null (Node.js only). './node/self.js' is required to provide
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// a window object through JSDom and assigned it to `self`.
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// When `self.window` and therefore the local `window` is still null after that,
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// we know that we are in a worker-like context. This check is used all across
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// the library, see for example `View.create()`.
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// NOTE: We're not modifying the global `self` here. We receive its value passed
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// to the paper.js function scope, and this is the one that is modified here.
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self = self || require('./node/self.js');
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var window = self.window,
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document = self.document;
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