/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

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

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

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

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/
/**
 * 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);
    },
    
    getCellByPosition: function(pos, returnDom) {
        var col = pos.column,
            lockedSize = this.lockedGrid.getColumnManager().getColumns().length;
            
        // Normalize view
        if (col >= lockedSize) {
            // Make a copy so we don't mutate the passed object
            pos = Ext.apply({}, pos);
            pos.column -= lockedSize;
            return this.normalView.getCellByPosition(pos, returnDom);
        } else {
            return this.lockedView.getCellByPosition(pos, returnDom);
        }
    },

    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);
        }
    }

});