/**
 * mctabs.js
 *
 * Copyright 2009, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://tinymce.moxiecode.com/license
 * Contributing: http://tinymce.moxiecode.com/contributing
 */

function MCTabs() {
    this.settings = [];
    this.onChange = tinyMCEPopup.editor.windowManager.createInstance('tinymce.util.Dispatcher');
};

MCTabs.prototype.init = function(settings) {
    this.settings = settings;
};

MCTabs.prototype.getParam = function(name, default_value) {
    var value = null;

    value = (typeof(this.settings[name]) == "undefined") ? default_value : this.settings[name];

    // Fix bool values
    if (value == "true" || value == "false")
        return (value == "true");

    return value;
};

MCTabs.prototype.showTab =function(tab){
    tab.className = 'current';
    tab.setAttribute("aria-selected", true);
    tab.setAttribute("aria-expanded", true);
    tab.tabIndex = 0;
};

MCTabs.prototype.hideTab =function(tab){
    var t=this;

    tab.className = '';
    tab.setAttribute("aria-selected", false);
    tab.setAttribute("aria-expanded", false);
    tab.tabIndex = -1;
};

MCTabs.prototype.showPanel = function(panel) {
    panel.className = 'current'; 
    panel.setAttribute("aria-hidden", false);
};

MCTabs.prototype.hidePanel = function(panel) {
    panel.className = 'panel';
    panel.setAttribute("aria-hidden", true);
}; 

MCTabs.prototype.getPanelForTab = function(tabElm) {
    return tinyMCEPopup.dom.getAttrib(tabElm, "aria-controls");
};

MCTabs.prototype.displayTab = function(tab_id, panel_id, avoid_focus) {
    var panelElm, panelContainerElm, tabElm, tabContainerElm, selectionClass, nodes, i, t = this;

    tabElm = document.getElementById(tab_id);

    if (panel_id === undefined) {
        panel_id = t.getPanelForTab(tabElm);
    }

    panelElm= document.getElementById(panel_id);
    panelContainerElm = panelElm ? panelElm.parentNode : null;
    tabContainerElm = tabElm ? tabElm.parentNode : null;
    selectionClass = t.getParam('selection_class', 'current');

    if (tabElm && tabContainerElm) {
        nodes = tabContainerElm.childNodes;

        // Hide all other tabs
        for (i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeName == "LI") {
                t.hideTab(nodes[i]);
            }
        }

        // Show selected tab
        t.showTab(tabElm);
    }

    if (panelElm && panelContainerElm) {
        nodes = panelContainerElm.childNodes;

        // Hide all other panels
        for (i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeName == "DIV")
                t.hidePanel(nodes[i]);
        }

        if (!avoid_focus) { 
            tabElm.focus();
        }

        // Show selected panel
        t.showPanel(panelElm);
    }
};

MCTabs.prototype.getAnchor = function() {
    var pos, url = document.location.href;

    if ((pos = url.lastIndexOf('#')) != -1)
        return url.substring(pos + 1);

    return "";
};


//Global instance
var mcTabs = new MCTabs();

tinyMCEPopup.onInit.add(function() {
    var tinymce = tinyMCEPopup.getWin().tinymce, dom = tinyMCEPopup.dom, each = tinymce.each;

    each(dom.select('div.tabs'), function(tabContainerElm) {
        var keyNav;

        dom.setAttrib(tabContainerElm, "role", "tablist"); 

        var items = tinyMCEPopup.dom.select('li', tabContainerElm);
        var action = function(id) {
            mcTabs.displayTab(id, mcTabs.getPanelForTab(id));
            mcTabs.onChange.dispatch(id);
        };

        each(items, function(item) {
            dom.setAttrib(item, 'role', 'tab');
            dom.bind(item, 'click', function(evt) {
                action(item.id);
            });
        });

        dom.bind(dom.getRoot(), 'keydown', function(evt) {
            if (evt.keyCode === 9 && evt.ctrlKey && !evt.altKey) { // Tab
                keyNav.moveFocus(evt.shiftKey ? -1 : 1);
                tinymce.dom.Event.cancel(evt);
            }
        });

        each(dom.select('a', tabContainerElm), function(a) {
            dom.setAttrib(a, 'tabindex', '-1');
        });

        keyNav = tinyMCEPopup.editor.windowManager.createInstance('tinymce.ui.KeyboardNavigation', {
            root: tabContainerElm,
            items: items,
            onAction: action,
            actOnFocus: true,
            enableLeftRight: true,
            enableUpDown: true
        }, tinyMCEPopup.dom);
    });
});