jquery.cycle2.hash.js

/*! hash plugin for Cycle2;  version: 20130905 */
(function($) {
"use strict";

$(document).on( 'cycle-pre-initialize', function( e, opts ) {
    onHashChange( opts, true );

    opts._onHashChange = function() {
        onHashChange( opts, false );
    };

    $( window ).on( 'hashchange', opts._onHashChange);
});

$(document).on( 'cycle-update-view', function( e, opts, slideOpts ) {
    if ( slideOpts.hash && ( '#' + slideOpts.hash ) != window.location.hash ) {
        opts._hashFence = true;
        window.location.hash = slideOpts.hash;
    }
});

$(document).on( 'cycle-destroyed', function( e, opts) {
    if ( opts._onHashChange ) {
        $( window ).off( 'hashchange', opts._onHashChange );
    }
});

function onHashChange( opts, setStartingSlide ) {
    var hash;
    if ( opts._hashFence ) {
        opts._hashFence = false;
        return;
    }
    
    hash = window.location.hash.substring(1);

    opts.slides.each(function(i) {
        if ( $(this).data( 'cycle-hash' ) == hash ) {
            if ( setStartingSlide === true ) {
                opts.startingSlide = i;
            }
            else {
                var fwd = opts.currSlide < i;
                opts.nextSlide = i;
                opts.API.prepareTx( true, fwd );
            }
            return false;
        }
    });
}

})(jQuery);