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"use strict";
/*
* Copyright (c) 2013-2025 Vanessa Freudenberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Create Squeak VM namespace
if (!self.Squeak) self.Squeak = {};
// Setup a storage for settings
if (!Squeak.Settings) {
// Try (a working) localStorage and fall back to regular dictionary otherwise
var settings;
try {
// fails in restricted iframe
settings = self.localStorage;
settings["squeak-foo:"] = "bar";
if (settings["squeak-foo:"] !== "bar") throw Error();
delete settings["squeak-foo:"];
} catch(e) {
settings = {};
}
Squeak.Settings = settings;
}
if (!Object.extend) {
// Extend object by adding specified properties
Object.extend = function(obj /* + more args */ ) {
// skip arg 0, copy properties of other args to obj
for (var i = 1; i < arguments.length; i++)
if (typeof arguments[i] == 'object')
for (var name in arguments[i])
obj[name] = arguments[i][name];
};
}
// This mimics the Lively Kernel's subclassing scheme.
// When running there, Lively's subclasses and modules are used.
// Modules serve as namespaces in Lively. SqueakJS uses a flat namespace
// named "Squeak", but the code below still supports hierarchical names.
if (!Function.prototype.subclass) {
// Create subclass using specified class path and given properties
Function.prototype.subclass = function(classPath /* + more args */ ) {
// create subclass
var subclass = function() {
if (this.initialize) {
var result = this.initialize.apply(this, arguments);
if (result !== undefined) return result;
}
return this;
};
// set up prototype
var protoclass = function() { };
protoclass.prototype = this.prototype;
subclass.prototype = new protoclass();
// skip arg 0, copy properties of other args to prototype
for (var i = 1; i < arguments.length; i++)
Object.extend(subclass.prototype, arguments[i]);
// add class to namespace
var path = classPath.split("."),
className = path.pop(),
// Walk path starting at the global namespace (self)
// creating intermediate namespaces if necessary
namespace = path.reduce(function(namespace, path) {
if (!namespace[path]) namespace[path] = {};
return namespace[path];
}, self);
namespace[className] = subclass;
return subclass;
};
}
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