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

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

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;
};

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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);
}
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panelElm= document.getElementById(panel_id);
panelContainerElm = panelElm ? panelElm.parentNode : null;
tabContainerElm = tabElm ? tabElm.parentNode : null;
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selectionClass = t.getParam('selection_class', 'current');
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if (tabElm && tabContainerElm) {
nodes = tabContainerElm.childNodes;

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

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

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

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

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

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

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

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

return "";
};

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