Differential D11 Diff 14538 binaries/data/mods/public/gui/common/campaigns/utils.js

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				/**
				* Wrap object in a proxy, that calls callback
				* anytime a property is set, passing the property name as parameter.
				* Note that this doesn't modify any variable that pointer towards object,
				* so this is _not_ equivalent to replacing the target object with a proxy.
				*/
				function _watch(object, callback)
				{
				return new Proxy(object, {
				"get": (obj, key) => {
				return obj[key];
				},
				"set": (obj, key, value) => {
				obj[key] = value;
				callback(key);
				return true;
				}
				});
				}

				/**
				* Inherit from AutoWatcher to make 'this' a proxy object that
				* watches for its own property changes and calls the method given
				* (takes a string because 'this' is unavailable when calling 'super').
				* This can be used to e.g. automatically call a rendering function
				* if a property is changed.
				* Using inheritance is necessary because 'this' is immutable,
				* and isn't defined in the class constructor _unless_ super() is called.
				* (thus you can't do something like this = new Proxy(this) at the end).
				*/
				class AutoWatcher
				{
				constructor(method_name)
				{
				this._ready = false;
				return _watch(this, () => this._ready && this[method_name]());
				}
				}