this.window = this;

// wrapper around Python objects, this exists both to allow changing or
// reducing functionality and APIs compared to the Python counterpart (DOM)
// and to allow creating references to the functions/methods (which is not
// possible with objects exposed by python-spidermonkey)
function _importobject(pyobj, properties) {
    /* 'import' a python object

        this wraps the python object in a JavaScript layer, exposing only
        the methods named in methods

        methods is a mapping from name to the method to call
    */
    var ret = {};
    for (var i=0; i < properties.length; i++) {
        var prop = properties[i];
        if (typeof pyobj[prop] == 'function') {
            ret[prop] = function() {
                var retval = pyobj[prop].apply(pyobj, arguments);
                if (retval instanceof JSPyError) {
                    throw(new JSPyError(retval.name, retval.message,
                                        retval.exception));
                };
                return retval;
            };
        } else {
            ret[prop] = pyobj[prop];
        };
    };
    return ret;
};

this.document = _importobject(__document, [
    'getElementsByTagName',
    'getElementById',
    'getElementByClassName',
    'documentElement',
    'addEventListener',
]);

this.window = _importobject(__window, [
    'navigator',
    'title',
    'printline',
]);

function print() {
    window.printline.apply(window, arguments);
};