| // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| // Javascript preamble, that lets the output of dart2js run on JSShell. |
| |
| (function(self) { |
| // Using strict mode to avoid accidentally defining global variables. |
| "use strict"; // Should be first statement of this function. |
| |
| // Location (Uri.base) |
| |
| var workingDirectory = os.getenv("PWD"); |
| |
| // Global properties. "self" refers to the global object, so adding a |
| // property to "self" defines a global variable. |
| self.self = self; |
| |
| self.location = { href: "file://" + workingDirectory + "/" }; |
| |
| function computeCurrentScript() { |
| try { |
| throw new Error(); |
| } catch(e) { |
| var stack = e.stack; |
| print(stack); |
| // The jsshell stack looks like: |
| // computeCurrentScript@...preambles/jsshell.js:23:13 |
| // self.document.currentScript@...preambles/jsshell.js:53:37 |
| // @/tmp/foo.js:308:1 |
| // @/tmp/foo.js:303:1 |
| // @/tmp/foo.js:5:1 |
| var re = new RegExp("^.*@(.*):[0-9]*:[0-9]*$", "mg"); |
| var lastMatch = null; |
| do { |
| var match = re.exec(stack); |
| if (match != null) lastMatch = match; |
| } while (match != null); |
| return lastMatch[1]; |
| } |
| } |
| |
| // Adding a 'document' is dangerous since it invalidates the 'typeof document' |
| // test to see if we are running in the browser. It means that the runtime |
| // needs to do more precise checks. |
| // Note that we can't run "currentScript" right away, since that would give |
| // us the location of the preamble file. Instead we wait for the first access |
| // which should happen just before invoking main. At this point we are in |
| // the main file and setting the currentScript property is correct. |
| // Note that we cannot use `thisFileName()`, since that would give us the |
| // preamble and not the script file. |
| var cachedCurrentScript = null; |
| self.document = { get currentScript() { |
| if (cachedCurrentScript == null) { |
| cachedCurrentScript = {src: computeCurrentScript()}; |
| } |
| return cachedCurrentScript; |
| } |
| }; |
| |
| // Support for deferred loading. |
| self.dartDeferredLibraryLoader = function(uri, successCallback, errorCallback) { |
| try { |
| load(uri); |
| successCallback(); |
| } catch (error) { |
| errorCallback(error); |
| } |
| }; |
| |
| // Mock cryptographically secure random by using plain random. |
| self.crypto = {getRandomValues: function(array) { |
| for (var i = 0; i < array.length; i++) { |
| array[i] = Math.random() * 256; |
| } |
| }}; |
| })(this) |
| |
| var getKeys = function(obj){ |
| var keys = []; |
| for(var key in obj){ |
| keys.push(key); |
| } |
| return keys; |
| } |