/*
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: 2013-05-16 14:36:50 (f9be68accb407158ba2b1be2c226a6ce1f649314)
*/
/**
 * This class is used internally to provide a single interface when using
 * a locking grid. Internally, the locking grid creates two separate grids,
 * so this class is used to map calls appropriately.
 * @private
 */
Ext.define('Ext.grid.locking.View', {
    alternateClassName: 'Ext.grid.LockingView',

    mixins: {
        observable: 'Ext.util.Observable'
    },

    /**
     * @property {Boolean} isLockingView
     * `true` in this class to identify an object as an instantiated LockingView, or subclass thereof.
     */
    isLockingView: true,

    eventRelayRe: /^(beforeitem|beforecontainer|item|container|cell|refresh)/,

    constructor: function(config){
        var me = this,
            eventNames = [],
            eventRe = me.eventRelayRe,
            locked = config.locked.getView(),
            normal = config.normal.getView(),
            events,
            event;

        Ext.apply(me, {
            lockedView: locked,
            normalView: normal,
            lockedGrid: config.locked,
            normalGrid: config.normal,
            panel: config.panel
        });
        me.mixins.observable.constructor.call(me, config);

        // relay events
        events = locked.events;
        for (event in events) {
            if (events.hasOwnProperty(event) && eventRe.test(event)) {
                eventNames.push(event);
            }
        }
        me.relayEvents(locked, eventNames);
        me.relayEvents(normal, eventNames);

        normal.on({
            scope: me,
            itemmouseleave: me.onItemMouseLeave,
            itemmouseenter: me.onItemMouseEnter
        });

        locked.on({
            scope: me,
            itemmouseleave: me.onItemMouseLeave,
            itemmouseenter: me.onItemMouseEnter
        });
        
        me.panel.on({
            render: me.onPanelRender,
            scope: me
        });
    },

    onPanelRender: function() {
        var me = this,
            mask = me.loadMask,
            cfg = {
                target: me.panel,
                msg: me.loadingText,
                msgCls: me.loadingCls,
                useMsg: me.loadingUseMsg,
                store: me.panel.store
            };

        // Because this is used as a View, it should have an el. Use the owning Lockable's body.
        // It also has to fire a render event so that Editing plugins can attach listeners
        me.el = me.panel.body;
        me.fireEvent('render', me);

        if (mask) {
            // either a config object 
            if (Ext.isObject(mask)) {
                cfg = Ext.apply(cfg, mask);
            }
            // Attach the LoadMask to a *Component* so that it can be sensitive to resizing during long loads.
            // If this DataView is floating, then mask this DataView.
            // Otherwise, mask its owning Container (or this, if there *is* no owning Container).
            // LoadMask captures the element upon render.
            me.loadMask = new Ext.LoadMask(cfg);
        }
    },

    getGridColumns: function() {
        var cols = this.lockedGrid.headerCt.getVisibleGridColumns();
        return cols.concat(this.normalGrid.headerCt.getVisibleGridColumns());
    },

    getEl: function(column){
        return this.getViewForColumn(column).getEl();
    },

    getViewForColumn: function(column) {
        var view = this.lockedView,
            inLocked;

        view.headerCt.cascade(function(col){
            if (col === column) {
                inLocked = true;
                return false;
            }
        });

        return inLocked ? view : this.normalView;
    },

    onItemMouseEnter: function(view, record){
        var me = this,
            locked = me.lockedView,
            other = me.normalView,
            item;

        if (view.trackOver) {
            if (view !== locked) {
                other = locked;
            }
            item = other.getNode(record, false);
            other.highlightItem(item);
        }
    },

    onItemMouseLeave: function(view, record){
        var me = this,
            locked = me.lockedView,
            other = me.normalView;

        if (view.trackOver) {
            if (view !== locked) {
                other = locked;
            }
            other.clearHighlight();
        }
    },

    relayFn: function(name, args){
        args = args || [];

        var view = this.lockedView;
        view[name].apply(view, args);
        view = this.normalView;
        view[name].apply(view, args);
    },

    getSelectionModel: function(){
        return this.panel.getSelectionModel();
    },

    getStore: function(){
        return this.panel.store;
    },

    getNode: function(nodeInfo, dataRow) {
        // default to the normal view
        return this.normalView.getNode(nodeInfo, dataRow);
    },

    getCell: function(record, column) {
        var view = this.getViewForColumn(column),
            row = view.getNode(record, true);
            
        return Ext.fly(row).down(column.getCellSelector());
    },

    indexOf: function(record) {
        var result = this.lockedView.indexOf(record);
        if (!result) {
            result = this.normalView.indexOf(record);
        }
        return result;
    },

    focus: function() {
        var p = this.getSelectionModel().getCurrentPosition(),
            v = p ? p.view : this.normalView;

        v.focus();
    },
    
    focusRow: function(row) {
        this.normalView.focusRow(row);
    },

    focusCell: function(position) {
        position.view.focusCell(position);
    },

    isVisible: function(deep) {
        return this.panel.isVisible(deep);
    },

    getRecord: function(node) {
        var result = this.lockedView.getRecord(node);
        if (!result) {
            result = this.normalView.getRecord(node);
        }
        return result;
    },
    
    scrollBy: function(){
        var normal = this.normalView;
        normal.scrollBy.apply(normal, arguments);
    },

    addElListener: function(eventName, fn, scope){
        this.relayFn('addElListener', arguments);
    },

    refreshNode: function(){
        this.relayFn('refreshNode', arguments);
    },

    refresh: function(){
        this.relayFn('refresh', arguments);
    },

    bindStore: function(){
        this.relayFn('bindStore', arguments);
    },

    addRowCls: function(){
        this.relayFn('addRowCls', arguments);
    },

    removeRowCls: function(){
        this.relayFn('removeRowCls', arguments);
    },
    
    destroy: function(){
        var me = this,
            mask = me.loadMask;
            
        // Typically the mask unbinding is handled by the view, but
        // we aren't a normal view, so clear it out here
        me.clearListeners();
        if (mask && mask.bindStore) {
            mask.bindStore(null);
        }
    }

});