// SpryTabbedPanels.js - version 0.7 - Spry Pre-Release 1.6.1

//

// Copyright (c) 2006. Adobe Systems Incorporated.

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//

//   * Redistributions of source code must retain the above copyright notice,

//     this list of conditions and the following disclaimer.

//   * Redistributions in binary form must reproduce the above copyright notice,

//     this list of conditions and the following disclaimer in the documentation

//     and/or other materials provided with the distribution.

//   * Neither the name of Adobe Systems Incorporated nor the names of its

//     contributors may be used to endorse or promote products derived from this

//     software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.



(function () { // BeginSpryComponent



    if (typeof Spry == "undefined") window.Spry = {}; if (!Spry.Widget) Spry.Widget = {};



    Spry.Widget.TabbedPanels = function (element, opts) {

        this.element = this.getElement(element);

        this.defaultTab = 0; // Show the first panel by default.

        this.tabSelectedClass = "TabbedPanelsTabSelected";

        this.tabHoverClass = "TabbedPanelsTabHover";

        this.tabFocusedClass = "TabbedPanelsTabFocused";

        this.panelVisibleClass = "TabbedPanelsContentVisible";

        this.focusElement = null;

        this.hasFocus = false;

        this.currentTabIndex = 0;

        this.enableKeyboardNavigation = true;

        this.nextPanelKeyCode = Spry.Widget.TabbedPanels.KEY_RIGHT;

        this.previousPanelKeyCode = Spry.Widget.TabbedPanels.KEY_LEFT;



        Spry.Widget.TabbedPanels.setOptions(this, opts);



        // If the defaultTab is expressed as a number/index, convert

        // it to an element.



        if (typeof (this.defaultTab) == "number") {

            if (this.defaultTab < 0)

                this.defaultTab = 0;

            else {

                var count = this.getTabbedPanelCount();

                if (this.defaultTab >= count)

                    this.defaultTab = (count > 1) ? (count - 1) : 0;

            }



            this.defaultTab = this.getTabs()[this.defaultTab];

        }



        // The defaultTab property is supposed to be the tab element for the tab content

        // to show by default. The caller is allowed to pass in the element itself or the

        // element's id, so we need to convert the current value to an element if necessary.



        if (this.defaultTab)

            this.defaultTab = this.getElement(this.defaultTab);



        this.attachBehaviors();

    };



    Spry.Widget.TabbedPanels.prototype.getElement = function (ele) {

        if (ele && typeof ele == "string")

            return document.getElementById(ele);

        return ele;

    };



    Spry.Widget.TabbedPanels.prototype.getElementChildren = function (element) {

        var children = [];

        var child = element.firstChild;

        while (child) {

            if (child.nodeType == 1 /* Node.ELEMENT_NODE */)

                children.push(child);

            child = child.nextSibling;

        }

        return children;

    };



    Spry.Widget.TabbedPanels.prototype.addClassName = function (ele, className) {

        if (!ele || !className || (ele.className && ele.className.search(new RegExp("\\b" + className + "\\b")) != -1))

            return;

        ele.className += (ele.className ? " " : "") + className;

    };



    Spry.Widget.TabbedPanels.prototype.removeClassName = function (ele, className) {

        if (!ele || !className || (ele.className && ele.className.search(new RegExp("\\b" + className + "\\b")) == -1))

            return;

        ele.className = ele.className.replace(new RegExp("\\s*\\b" + className + "\\b", "g"), "");

    };



    Spry.Widget.TabbedPanels.setOptions = function (obj, optionsObj, ignoreUndefinedProps) {

        if (!optionsObj)

            return;

        for (var optionName in optionsObj) {

            if (ignoreUndefinedProps && optionsObj[optionName] == undefined)

                continue;

            obj[optionName] = optionsObj[optionName];

        }

    };



    Spry.Widget.TabbedPanels.prototype.getTabGroup = function () {

        if (this.element) {

            var children = this.getElementChildren(this.element);

            if (children.length)

                return children[0];

        }

        return null;

    };



    Spry.Widget.TabbedPanels.prototype.getTabs = function () {

        var tabs = [];

        var tg = this.getTabGroup();

        if (tg)

            tabs = this.getElementChildren(tg);

        return tabs;

    };



    Spry.Widget.TabbedPanels.prototype.getContentPanelGroup = function () {

        if (this.element) {

            var children = this.getElementChildren(this.element);

            if (children.length > 1)

                return children[1];

        }

        return null;

    };



    Spry.Widget.TabbedPanels.prototype.getContentPanels = function () {

        var panels = [];

        var pg = this.getContentPanelGroup();

        if (pg)

            panels = this.getElementChildren(pg);

        return panels;

    };



    Spry.Widget.TabbedPanels.prototype.getIndex = function (ele, arr) {

        ele = this.getElement(ele);

        if (ele && arr && arr.length) {

            for (var i = 0; i < arr.length; i++) {

                if (ele == arr[i])

                    return i;

            }

        }

        return -1;

    };



    Spry.Widget.TabbedPanels.prototype.getTabIndex = function (ele) {

        var i = this.getIndex(ele, this.getTabs());

        if (i < 0)

            i = this.getIndex(ele, this.getContentPanels());

        return i;

    };



    Spry.Widget.TabbedPanels.prototype.getCurrentTabIndex = function () {

        return this.currentTabIndex;

    };



    Spry.Widget.TabbedPanels.prototype.getTabbedPanelCount = function (ele) {

        return Math.min(this.getTabs().length, this.getContentPanels().length);

    };



    Spry.Widget.TabbedPanels.addEventListener = function (element, eventType, handler, capture) {

        try {

            if (element.addEventListener)

                element.addEventListener(eventType, handler, capture);

            else if (element.attachEvent)

                element.attachEvent("on" + eventType, handler);

        }

        catch (e) { }

    };



    Spry.Widget.TabbedPanels.prototype.cancelEvent = function (e) {

        if (e.preventDefault) e.preventDefault();

        else e.returnValue = false;

        if (e.stopPropagation) e.stopPropagation();

        else e.cancelBubble = true;



        return false;

    };



    Spry.Widget.TabbedPanels.prototype.onTabClick = function (e, tab) {

        hideTab();

        this.showPanel(tab);

        return this.cancelEvent(e);

    };



    Spry.Widget.TabbedPanels.prototype.onTabMouseOver = function (e, tab) {

        this.addClassName(tab, this.tabHoverClass);

        return false;

    };



    Spry.Widget.TabbedPanels.prototype.onTabMouseOut = function (e, tab) {

        this.removeClassName(tab, this.tabHoverClass);

        return false;

    };



    Spry.Widget.TabbedPanels.prototype.onTabFocus = function (e, tab) {

        this.hasFocus = true;

        this.addClassName(tab, this.tabFocusedClass);

        return false;

    };



    Spry.Widget.TabbedPanels.prototype.onTabBlur = function (e, tab) {

        this.hasFocus = false;

        this.removeClassName(tab, this.tabFocusedClass);

        return false;

    };



    Spry.Widget.TabbedPanels.KEY_UP = 38;

    Spry.Widget.TabbedPanels.KEY_DOWN = 40;

    Spry.Widget.TabbedPanels.KEY_LEFT = 37;

    Spry.Widget.TabbedPanels.KEY_RIGHT = 39;







    Spry.Widget.TabbedPanels.prototype.onTabKeyDown = function (e, tab) {

        var key = e.keyCode;

        if (!this.hasFocus || (key != this.previousPanelKeyCode && key != this.nextPanelKeyCode))

            return true;



        var tabs = this.getTabs();

        for (var i = 0; i < tabs.length; i++)

            if (tabs[i] == tab) {

                var el = false;

                if (key == this.previousPanelKeyCode && i > 0)

                    el = tabs[i - 1];

                else if (key == this.nextPanelKeyCode && i < tabs.length - 1)

                    el = tabs[i + 1];



                if (el) {

                    this.showPanel(el);

                    el.focus();

                    break;

                }

            }



        return this.cancelEvent(e);

    };



    Spry.Widget.TabbedPanels.prototype.preorderTraversal = function (root, func) {

        var stopTraversal = false;

        if (root) {

            stopTraversal = func(root);

            if (root.hasChildNodes()) {

                var child = root.firstChild;

                while (!stopTraversal && child) {

                    stopTraversal = this.preorderTraversal(child, func);

                    try { child = child.nextSibling; } catch (e) { child = null; }

                }

            }

        }

        return stopTraversal;

    };



    Spry.Widget.TabbedPanels.prototype.addPanelEventListeners = function (tab, panel) {

        var self = this;

        Spry.Widget.TabbedPanels.addEventListener(tab, "click", function (e) { return self.onTabClick(e, tab); }, false);

        Spry.Widget.TabbedPanels.addEventListener(tab, "mouseover", function (e) { return self.onTabMouseOver(e, tab); }, false);

        Spry.Widget.TabbedPanels.addEventListener(tab, "mouseout", function (e) { return self.onTabMouseOut(e, tab); }, false);



        if (this.enableKeyboardNavigation) {

            // XXX: IE doesn't allow the setting of tabindex dynamically. This means we can't

            // rely on adding the tabindex attribute if it is missing to enable keyboard navigation

            // by default.



            // Find the first element within the tab container that has a tabindex or the first

            // anchor tag.



            var tabIndexEle = null;

            var tabAnchorEle = null;



            this.preorderTraversal(tab, function (node) {

                if (node.nodeType == 1 /* NODE.ELEMENT_NODE */) {

                    var tabIndexAttr = tab.attributes.getNamedItem("tabindex");

                    if (tabIndexAttr) {

                        tabIndexEle = node;

                        return true;

                    }

                    if (!tabAnchorEle && node.nodeName.toLowerCase() == "a")

                        tabAnchorEle = node;

                }

                return false;

            });



            if (tabIndexEle)

                this.focusElement = tabIndexEle;

            else if (tabAnchorEle)

                this.focusElement = tabAnchorEle;



            if (this.focusElement) {

                Spry.Widget.TabbedPanels.addEventListener(this.focusElement, "focus", function (e) { return self.onTabFocus(e, tab); }, false);

                Spry.Widget.TabbedPanels.addEventListener(this.focusElement, "blur", function (e) { return self.onTabBlur(e, tab); }, false);

                Spry.Widget.TabbedPanels.addEventListener(this.focusElement, "keydown", function (e) { return self.onTabKeyDown(e, tab); }, false);

            }

        }

    };



    Spry.Widget.TabbedPanels.prototype.showPanel = function (elementOrIndex) {

        var tpIndex = -1;



        if (typeof elementOrIndex == "number")

            tpIndex = elementOrIndex;

        else // Must be the element for the tab or content panel.

            tpIndex = this.getTabIndex(elementOrIndex);



        if (!tpIndex < 0 || tpIndex >= this.getTabbedPanelCount())

            return;



        var tabs = this.getTabs();

        var panels = this.getContentPanels();



        var numTabbedPanels = Math.max(tabs.length, panels.length);



        for (var i = 0; i < numTabbedPanels; i++) {

            if (i != tpIndex) {

                if (tabs[i])

                    this.removeClassName(tabs[i], this.tabSelectedClass);

                if (panels[i]) {

                    this.removeClassName(panels[i], this.panelVisibleClass);

                    panels[i].style.display = "none";

                }

            }

        }



        this.addClassName(tabs[tpIndex], this.tabSelectedClass);

        this.addClassName(panels[tpIndex], this.panelVisibleClass);

        panels[tpIndex].style.display = "block";



        this.currentTabIndex = tpIndex;

    };



    Spry.Widget.TabbedPanels.prototype.attachBehaviors = function (element) {

        var tabs = this.getTabs();

        var panels = this.getContentPanels();

        var panelCount = this.getTabbedPanelCount();



        for (var i = 0; i < panelCount; i++)

            this.addPanelEventListeners(tabs[i], panels[i]);



        this.showPanel(this.defaultTab);

    };



})();  // EndSpryComponent