/**
* @license
* jQuery Tools @VERSION / Scrollable Navigator
*
* NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE.
*
* http://flowplayer.org/tools/scrollable/navigator.html
*
* Since: September 2009
* Date: @DATE
*/
(function($) {

var t = $.tools.scrollable;

t.navigator = {

conf: {
navi: '.navi',
naviItem: null,
activeClass: 'active',
indexed: false,
idPrefix: null,

// 1.2
history: false
}
};

function find(root, query) {
var el = $(query);
return el.length < 2 ? el : root.parent().find(query);
}

// jQuery plugin implementation
$.fn.navigator = function(conf) {

// configuration
if (typeof conf == 'string') { conf = {navi: conf}; }
conf = $.extend({}, t.navigator.conf, conf);

var ret;

this.each(function() {

var api = $(this).data("scrollable"),
navi = conf.navi.jquery ? conf.navi : find(api.getRoot(), conf.navi),
buttons = api.getNaviButtons(),
cls = conf.activeClass,
history = conf.history && $.fn.history;

// @deprecated stuff
if (api) { ret = api; }

api.getNaviButtons = function() {
return buttons.add(navi);
};


function doClick(el, i, e) {
api.seekTo(i);
if (history) {
if (location.hash) {
location.hash = el.attr("href").replace("#", "");
}
} else {
return e.preventDefault();
}
}

function els() {
return navi.find(conf.naviItem || '> *');
}

function addItem(i) {

var item = $("<" + (conf.naviItem || 'a') + "/>").click(function(e) {
doClick($(this), i, e);

}).attr("href", "#" + i);

// index number / id attribute
if (i === 0) { item.addClass(cls); }
if (conf.indexed) { item.text(i + 1); }
if (conf.idPrefix) { item.attr("id", conf.idPrefix + i); }

return item.appendTo(navi);
}


// generate navigator
if (els().length) {
els().each(function(i) {
$(this).click(function(e) {
doClick($(this), i, e);
});
});

} else {
$.each(api.getItems(), function(i) {
addItem(i);
});
}

// activate correct entry
api.onBeforeSeek(function(e, index) {
setTimeout(function() {
if (!e.isDefaultPrevented()) {
var el = els().eq(index);
if (!e.isDefaultPrevented() && el.length) {
els().removeClass(cls).eq(index).addClass(cls);
}
}
}, 1);
});

function doHistory(evt, hash) {
var el = els().eq(hash.replace("#", ""));
if (!el.length) {
el = els().filter("[href=" + hash + "]");
}
el.click();
}

// new item being added
api.onAddItem(function(e, item) {
item = addItem(api.getItems().index(item));
if (history) { item.history(doHistory); }
});

if (history) { els().history(doHistory); }

});

return conf.api ? ret : this;

};

})(jQuery);