package doglet.text;

import nova.Machine;
import nova.Store;
import nova.runtime;
import nova.special;

/**
 * Warranty & Liability
 * To the extent permitted by applicable law and unless explicitly
 * otherwise agreed upon, XLOG Technologies AG makes no warranties
 * regarding the provided information. XLOG Technologies AG assumes
 * no liability that any problems might be solved with the information
 * provided by XLOG Technologies AG.
 *
 * Rights & License
 * All industrial property rights regarding the information - copyright
 * and patent rights in particular - are the sole property of XLOG
 * Technologies AG. If the company was not the originator of some
 * excerpts, XLOG Technologies AG has at least obtained the right to
 * reproduce, change and translate the information.
 *
 * Reproduction is restricted to the whole unaltered document. Reproduction
 * of the information is only allowed for non-commercial uses. Selling,
 * giving away or letting of the execution of the library is prohibited.
 * The library can be distributed as part of your applications and libraries
 * for execution provided this comment remains unchanged.
 *
 * Restrictions
 * Only to be distributed with programs that add significant and primary
 * functionality to the library. Not to be distributed with additional
 * software intended to replace any components of the library.
 *
 * Trademarks
 * Jekejeke is a registered trademark of XLOG Technologies AG.
 */
public final class domlib {

    /*****************************************************************/
    /* Sink API                                                      */
    /*****************************************************************/

    /**
     * ir_is_sink(O):
     * The predicate succeeds if O is a sink.
     */
    private static boolean test_ir_is_sink(Object[] args) {
        Object obj = Machine.exec_build(args[0]);
        return (obj instanceof runtime.Sink);
    }

    /*****************************************************************/
    /* DOM Machine                                                   */
    /*****************************************************************/

    /**
     * ir_is_element(O):
     * The predicate succeeds if O is a DOM element.
     */
    private static boolean test_ir_is_element(Object[] args) {
        return false;
    }

    /*****************************************************************/
    /* Markup Streams                                                */
    /*****************************************************************/

    /**
     * dom_output_new(S, W):
     * The predicate succeeds in W with a new markup writer to the stream S.
     */
    private static boolean test_dom_output_new(Object[] args) {
        Object obj = Machine.exec_build(args[0]);
        runtime.check_sink(obj);
        runtime.Sink dst = new runtime.Sink();
        dst.data = obj;
        dst.send = domlib::xml_send;
        dst.notify = runtime::flush;
        dst.release = runtime::close;
        dst.buf = null;
        return Machine.exec_unify(args[1], dst);
    }

    private static Object xml_send(Object data, String buf) {
        String text = auxlib.xml_escape(buf);
        runtime.put_atom((runtime.Sink) data, text);
        return data;
    }

    /******************************************************************/
    /* Dom Lib Init                                                   */
    /******************************************************************/

    public static void main() {
        Store.add("ir_is_sink", 1, special.make_check(domlib::test_ir_is_sink));
        Store.add("ir_is_element", 1, special.make_check(domlib::test_ir_is_element));
        Store.add("dom_output_new", 2, special.make_check(domlib::test_dom_output_new));
    }

}
