/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-03-11 22:33:40 (aed16176e68b5e8aa1433452b12805c0ad913836)
*/
/**
 * A base class for all menu items that require menu-related functionality such as click handling,
 * sub-menus, icons, etc.
 *
 *     @example
 *     Ext.create('Ext.menu.Menu', {
 *         width: 100,
 *         height: 100,
 *         floating: false,  // usually you want this set to True (default)
 *         renderTo: Ext.getBody(),  // usually rendered by it's containing component
 *         items: [{
 *             text: 'icon item',
 *             iconCls: 'add16'
 *         },{
 *             text: 'text item'
 *         },{
 *             text: 'plain item',
 *             plain: true
 *         }]
 *     });
 */
Ext.define('Ext.menu.Item', {
    extend: 'Ext.Component',
    alias: 'widget.menuitem',
    alternateClassName: 'Ext.menu.TextItem',

    /**
     * @property {Boolean} activated
     * Whether or not this item is currently activated
     */

    /**
     * @property {Ext.menu.Menu} parentMenu
     * The parent Menu of this item.
     */

    /**
     * @cfg {String} activeCls
     * The CSS class added to the menu item when the item is activated (focused/mouseover).
     */
    activeCls: Ext.baseCSSPrefix + 'menu-item-active',

    /**
     * @cfg {String} ariaRole
     * @private
     */
    ariaRole: 'menuitem',

    /**
     * @cfg {Boolean} canActivate
     * Whether or not this menu item can be activated when focused/mouseovered.
     */
    canActivate: true,

    /**
     * @cfg {Number} clickHideDelay
     * The delay in milliseconds to wait before hiding the menu after clicking the menu item.
     * This only has an effect when `hideOnClick: true`.
     */
    clickHideDelay: 1,

    /**
     * @cfg {Boolean} destroyMenu
     * Whether or not to destroy any associated sub-menu when this item is destroyed.
     */
    destroyMenu: true,

    /**
     * @cfg {String} disabledCls
     * The CSS class added to the menu item when the item is disabled.
     */
    disabledCls: Ext.baseCSSPrefix + 'menu-item-disabled',

    /**
     * @cfg {String} [href='#']
     * The href attribute to use for the underlying anchor link.
     */

    /**
     * @cfg {String} hrefTarget
     * The target attribute to use for the underlying anchor link.
     */

    /**
     * @cfg {Boolean} hideOnClick
     * Whether to not to hide the owning menu when this item is clicked.
     */
    hideOnClick: true,

    /**
     * @cfg {String} icon
     * The path to an icon to display in this item.
     *
     * Defaults to `Ext.BLANK_IMAGE_URL`.
     */

    /**
     * @cfg {String} iconCls
     * A CSS class that specifies a `background-image` to use as the icon for this item.
     */

    /**
     * @cfg {Number/String} glyph
     * A numeric unicode character code to use as the icon for this item. The default
     * font-family for glyphs can be set globally using
     * {@link Ext#setGlyphFontFamily Ext.setGlyphFontFamily()}. Alternatively, this
     * config option accepts a string with the charCode and font-family separated by the
     * `@` symbol. For example '65@My Font Family'.
     */

    isMenuItem: true,

    /**
     * @cfg {Ext.menu.Menu/Object} menu
     * Either an instance of {@link Ext.menu.Menu} or a config object for an {@link Ext.menu.Menu}
     * which will act as a sub-menu to this item.
     */

    /**
     * @property {Ext.menu.Menu} menu The sub-menu associated with this item, if one was configured.
     */

    /**
     * @cfg {String} menuAlign
     * The default {@link Ext.util.Positionable#getAlignToXY Ext.util.Positionable.getAlignToXY} anchor position value for this
     * item's sub-menu relative to this item's position.
     */
    menuAlign: 'tl-tr?',

    /**
     * @cfg {Number} menuExpandDelay
     * The delay in milliseconds before this item's sub-menu expands after this item is moused over.
     */
    menuExpandDelay: 200,

    /**
     * @cfg {Number} menuHideDelay
     * The delay in milliseconds before this item's sub-menu hides after this item is moused out.
     */
    menuHideDelay: 200,

    /**
     * @cfg {Boolean} plain
     * Whether or not this item is plain text/html with no icon or visual activation.
     */

    /**
     * @cfg {String/Object} tooltip
     * The tooltip for the button - can be a string to be used as innerHTML (html tags are accepted) or
     * QuickTips config object.
     */

    /**
     * @cfg {String} tooltipType
     * The type of tooltip to use. Either 'qtip' for QuickTips or 'title' for title attribute.
     */
    tooltipType: 'qtip',

    arrowCls: Ext.baseCSSPrefix + 'menu-item-arrow',

    childEls: [
        'itemEl', 'iconEl', 'textEl', 'arrowEl'
    ],

    renderTpl: [
        '<tpl if="plain">',
            '{text}',
        '<tpl else>',
            '<a id="{id}-itemEl"',
                ' class="' + Ext.baseCSSPrefix + 'menu-item-link{childElCls}"',
                ' href="{href}"',
                '<tpl if="hrefTarget"> target="{hrefTarget}"</tpl>',
                ' hidefocus="true"',
                // For most browsers the text is already unselectable but Opera needs an explicit unselectable="on".
                ' unselectable="on"',
                '<tpl if="tabIndex">',
                    ' tabIndex="{tabIndex}"',
                '</tpl>',
            '>',
                '<div role="img" id="{id}-iconEl" class="' + Ext.baseCSSPrefix + 'menu-item-icon {iconCls}',
                    '{childElCls} {glyphCls}" style="<tpl if="icon">background-image:url({icon});</tpl>',
                    '<tpl if="glyph && glyphFontFamily">font-family:{glyphFontFamily};</tpl>">',
                    '<tpl if="glyph">&#{glyph};</tpl>',
                '</div>',
                '<span id="{id}-textEl" class="' + Ext.baseCSSPrefix + 'menu-item-text" unselectable="on">{text}</span>',
                '<img id="{id}-arrowEl" src="{blank}" class="{arrowCls}',
                    '{childElCls}"/>',
            '</a>',
        '</tpl>'
    ],

    maskOnDisable: false,

    /**
     * @cfg {String} text
     * The text/html to display in this item.
     */

    /**
     * @cfg {Function} handler
     * A function called when the menu item is clicked (can be used instead of {@link #click} event).
     * @cfg {Ext.menu.Item} handler.item The item that was clicked
     * @cfg {Ext.EventObject} handler.e The underyling {@link Ext.EventObject}.
     */

    activate: function() {
        var me = this;

        if (!me.activated && me.canActivate && me.rendered && !me.isDisabled() && me.isVisible()) {
            me.el.addCls(me.activeCls);
            me.focus();
            me.activated = true;
            me.fireEvent('activate', me);
        }
    },

    getFocusEl: function() {
        return this.itemEl;
    },

    deactivate: function() {
        var me = this;

        if (me.activated) {
            me.el.removeCls(me.activeCls);
            me.blur();
            me.hideMenu();
            me.activated = false;
            me.fireEvent('deactivate', me);
        }
    },

    deferHideMenu: function() {
        if (this.menu.isVisible()) {
            this.menu.hide();
        }
    },
    
    cancelDeferHide: function(){
        clearTimeout(this.hideMenuTimer);
    },

    deferHideParentMenus: function() {
        var ancestor;
        Ext.menu.Manager.hideAll();

        if (!Ext.Element.getActiveElement()) {
            // If we have just hidden all Menus, and there is no currently focused element in the dom, transfer focus to the first visible ancestor if any.
            ancestor = this.up(':not([hidden])');
            if (ancestor) {
                ancestor.focus();
            }
        }
    },

    expandMenu: function(delay) {
        var me = this;

        if (me.menu) {
            me.cancelDeferHide();
            if (delay === 0) {
                me.doExpandMenu();
            } else {
                clearTimeout(me.expandMenuTimer);
                me.expandMenuTimer = Ext.defer(me.doExpandMenu, Ext.isNumber(delay) ? delay : me.menuExpandDelay, me);
            }
        }
    },

    doExpandMenu: function() {
        var me = this,
            menu = me.menu;

        if (me.activated && (!menu.rendered || !menu.isVisible())) {
            me.parentMenu.activeChild = menu;
            menu.parentItem = me;
            menu.parentMenu = me.parentMenu;
            menu.showBy(me, me.menuAlign);
        }
    },

    getRefItems: function(deep) {
        var menu = this.menu,
            items;

        if (menu) {
            items = menu.getRefItems(deep);
            items.unshift(menu);
        }
        return items || [];
    },

    hideMenu: function(delay) {
        var me = this;

        if (me.menu) {
            clearTimeout(me.expandMenuTimer);
            me.hideMenuTimer = Ext.defer(me.deferHideMenu, Ext.isNumber(delay) ? delay : me.menuHideDelay, me);
        }
    },

    initComponent: function() {
        var me = this,
            prefix = Ext.baseCSSPrefix,
            cls = [prefix + 'menu-item'],
            menu;

        me.addEvents(
            /**
             * @event activate
             * Fires when this item is activated
             * @param {Ext.menu.Item} item The activated item
             */
            'activate',

            /**
             * @event click
             * Fires when this item is clicked
             * @param {Ext.menu.Item} item The item that was clicked
             * @param {Ext.EventObject} e The underyling {@link Ext.EventObject}.
             */
            'click',

            /**
             * @event deactivate
             * Fires when this tiem is deactivated
             * @param {Ext.menu.Item} item The deactivated item
             */
            'deactivate',

            /**
             * @event textchange
             * Fired when the item's text is changed by the {@link #setText} method.
             * @param {Ext.menu.Item} this
             * @param {String} oldText
             * @param {String} newText
             */
            'textchange',

            /**
             * @event iconchange
             * Fired when the item's icon is changed by the {@link #setIcon} or {@link #setIconCls} methods.
             * @param {Ext.menu.Item} this
             * @param {String} oldIcon
             * @param {String} newIcon
             */
            'iconchange'
        );

        if (me.plain) {
            cls.push(prefix + 'menu-item-plain');
        }

        if (me.cls) {
            cls.push(me.cls);
        }

        me.cls = cls.join(' ');

        if (me.menu) {
            menu = me.menu;
            delete me.menu;
            me.setMenu(menu);
        }

        me.callParent(arguments);
    },

    onClick: function(e) {
        var me = this;

        if (!me.href) {
            e.stopEvent();
        }

        if (me.disabled) {
            return;
        }

        if (me.hideOnClick) {
            me.deferHideParentMenusTimer = Ext.defer(me.deferHideParentMenus, me.clickHideDelay, me);
        }

        Ext.callback(me.handler, me.scope || me, [me, e]);
        me.fireEvent('click', me, e);

        if (!me.hideOnClick) {
            me.focus();
        }
    },

    onRemoved: function() {
        var me = this;

        // Removing the active item, must deactivate it.
        if (me.activated && me.parentMenu.activeItem === me) {
            me.parentMenu.deactivateActiveItem();
        }
        me.callParent(arguments);
        me.parentMenu = me.ownerButton = null;
    },

    // @private
    beforeDestroy: function() {
        var me = this;
        if (me.rendered) {
            me.clearTip();
        }
        me.callParent();
    },

    onDestroy: function() {
        var me = this;

        clearTimeout(me.expandMenuTimer);
        me.cancelDeferHide();
        clearTimeout(me.deferHideParentMenusTimer);

        me.setMenu(null);
        me.callParent(arguments);
    },

    beforeRender: function() {
        var me = this,
            blank = Ext.BLANK_IMAGE_URL,
            glyph = me.glyph,
            glyphFontFamily = Ext._glyphFontFamily,
            glyphParts, iconCls, arrowCls;

        me.callParent();

        if (me.iconAlign === 'right') {
            iconCls = me.checkChangeDisabled ? me.disabledCls : '';
            arrowCls = Ext.baseCSSPrefix + 'menu-item-icon-right ' + me.iconCls;
        } else {
            iconCls = (me.iconCls || '') + (me.checkChangeDisabled ? ' ' + me.disabledCls : '');
            arrowCls = me.menu ? me.arrowCls : '';
        }

        if (typeof glyph === 'string') {
            glyphParts = glyph.split('@');
            glyph = glyphParts[0];
            glyphFontFamily = glyphParts[1];
        }

        Ext.applyIf(me.renderData, {
            href: me.href || '#',
            hrefTarget: me.hrefTarget,
            icon: me.icon,
            iconCls: iconCls,
            glyph: glyph,
            glyphCls: glyph ? Ext.baseCSSPrefix + 'menu-item-glyph' : undefined,
            glyphFontFamily: glyphFontFamily,
            hasIcon: !!(me.icon || me.iconCls || glyph),
            iconAlign: me.iconAlign,
            plain: me.plain,
            text: me.text,
            arrowCls: arrowCls,
            blank: blank,
            tabIndex: me.tabIndex
        });
    },

    onRender: function() {
        var me = this;

        me.callParent(arguments);

        if (me.tooltip) {
            me.setTooltip(me.tooltip, true);
        }
    },
    
    /**
     * Set a child menu for this item. See the {@link #cfg-menu} configuration.
     * @param {Ext.menu.Menu/Object} menu A menu, or menu configuration. null may be
     * passed to remove the menu.
     * @param {Boolean} [destroyMenu] True to destroy any existing menu. False to
     * prevent destruction. If not specified, the {@link #destroyMenu} configuration
     * will be used.
     */
    setMenu: function(menu, destroyMenu) {
        var me = this,
            oldMenu = me.menu,
            arrowEl = me.arrowEl;
            
        if (oldMenu) {
            delete oldMenu.parentItem;
            delete oldMenu.parentMenu;
            delete oldMenu.ownerItem;
            
            if (destroyMenu === true || (destroyMenu !== false && me.destroyMenu)) {
                Ext.destroy(oldMenu);
            }
        }
        if (menu) {
            me.menu = Ext.menu.Manager.get(menu);
            me.menu.ownerItem = me;
        } else {
            me.menu = null;
        }
        
        if (me.rendered && !me.destroying && arrowEl) {
            arrowEl[me.menu ? 'addCls' : 'removeCls'](me.arrowCls);
        }
    },

    /**
     * Sets the {@link #click} handler of this item
     * @param {Function} fn The handler function
     * @param {Object} [scope] The scope of the handler function
     */
    setHandler: function(fn, scope) {
        this.handler = fn || null;
        this.scope = scope;
    },

    /**
     * Sets the {@link #icon} on this item.
     * @param {String} icon The new icon 
     */
    setIcon: function(icon){
        var iconEl = this.iconEl,
            oldIcon = this.icon;
        if (iconEl) {
            iconEl.src = icon || Ext.BLANK_IMAGE_URL;
        }
        this.icon = icon;
        this.fireEvent('iconchange', this, oldIcon, icon);
    },

    /**
     * Sets the {@link #iconCls} of this item
     * @param {String} iconCls The CSS class to set to {@link #iconCls}
     */
    setIconCls: function(iconCls) {
        var me = this,
            iconEl = me.iconEl,
            oldCls = me.iconCls;

        if (iconEl) {
            if (me.iconCls) {
                iconEl.removeCls(me.iconCls);
            }

            if (iconCls) {
                iconEl.addCls(iconCls);
            }
        }

        me.iconCls = iconCls;
        me.fireEvent('iconchange', me, oldCls, iconCls);
    },

    /**
     * Sets the {@link #text} of this item
     * @param {String} text The {@link #text}
     */
    setText: function(text) {
        var me = this,
            el = me.textEl || me.el,
            oldText = me.text;

        me.text = text;

        if (me.rendered) {
            el.update(text || '');
            // cannot just call layout on the component due to stretchmax
            me.ownerCt.updateLayout();
        }
        me.fireEvent('textchange', me, oldText, text);
    },

    getTipAttr: function(){
        return this.tooltipType == 'qtip' ? 'data-qtip' : 'title';
    },

    //private
    clearTip: function() {
        if (Ext.quickTipsActive && Ext.isObject(this.tooltip)) {
            Ext.tip.QuickTipManager.unregister(this.itemEl);
        }
    },

    /**
     * Sets the tooltip for this menu item.
     *
     * @param {String/Object} tooltip This may be:
     *
     *   - **String** : A string to be used as innerHTML (html tags are accepted) to show in a tooltip
     *   - **Object** : A configuration object for {@link Ext.tip.QuickTipManager#register}.
     *
     * @return {Ext.menu.Item} this
     */
    setTooltip: function(tooltip, initial) {
        var me = this;

        if (me.rendered) {
            if (!initial) {
                me.clearTip();
            }

            if (Ext.quickTipsActive && Ext.isObject(tooltip)) {
                Ext.tip.QuickTipManager.register(Ext.apply({
                    target: me.itemEl.id
                },
                tooltip));
                me.tooltip = tooltip;
            } else {
                me.itemEl.dom.setAttribute(me.getTipAttr(), tooltip);
            }
        } else {
            me.tooltip = tooltip;
        }

        return me;
    }
});
