/**
 * @class Ext.resizer.Splitter
 * @extends Ext.Component
 * 
This class functions between siblings of a {@link Ext.layout.container.VBox VBox} or {@link Ext.layout.container.HBox HBox}
 * layout to resize both immediate siblings.
 * 
By default it will set the size of both siblings. One of the siblings may be configured with
 * {@link Ext.component.Component#maintainFlex maintainFlex}: true which will cause it not to receive a new size explicitly, but to be resized
 * by the layout.
 * 
A Splitter may be configured to show a centered mini-collapse tool orientated to collapse the {@link #collapseTarget}.
 * The Splitter will then call that sibling Panel's {@link Ext.panel.Panel#collapse collapse} or {@link Ext.panel.Panel#expand expand} method
 * to perform the appropriate operation (depending on the sibling collapse state). To create the mini-collapse tool but take care
 * of collapsing yourself, configure the splitter with {@link #performCollapse} false.
 *
 */
Ext.define('Ext.resizer.Splitter', {
    extend: 'Ext.Component',
    requires: ['Ext.XTemplate'],
    uses: ['Ext.panel.Panel', 'Ext.resizer.SplitterTracker'],
    alias: 'widget.splitter',
    baseCls: Ext.baseCSSPrefix + 'splitter',
    collapsedCls: Ext.baseCSSPrefix + 'splitter-collapsed',

    
/**
     * @cfg {Boolean} collapsible
     * true to show a mini-collapse tool in the Splitter to toggle expand and collapse on the {@link #collapseTarget} Panel.
     * Defaults to the {@link Ext.panel.Panel#collapsible collapsible} setting of the Panel.
     */
    collapsible: false,

    
/**
     * @cfg {Boolean} performCollapse
     * 
Set to false to prevent this Splitter's mini-collapse tool from managing the collapse
     * state of the {@link #collapseTarget}.
     */

    
/**
     * @cfg {Boolean} collapseOnDblClick
     * true to enable dblclick to toggle expand and collapse on the {@link #collapseTarget} Panel.
     */
    collapseOnDblClick: true,

    
/**
     * @cfg {Number} defaultSplitMin
     * Provides a default minimum width or height for the two components
     * that the splitter is between.
     */
    defaultSplitMin: 40,

    
/**
     * @cfg {Number} defaultSplitMax
     * Provides a default maximum width or height for the two components
     * that the splitter is between.
     */
    defaultSplitMax: 1000,

    width: 6,
    height: 6,

    
/**
     * @cfg {Mixed} collapseTarget
     * 
A string describing the relative position of the immediate sibling Panel to collapse. May be 'prev' or 'next' (Defaults to 'next')
     * 
Or the immediate sibling Panel to collapse.
     * 
The orientation of the mini-collapse tool will be inferred from this setting.
     * 
Note that only Panels may be collapsed.
     */
    collapseTarget: 'next',

    
/**
     * @property orientation
     * @type String
     * Orientation of this Splitter. 'vertical' when used in an hbox layout, 'horizontal'
     * when used in a vbox layout.
     */

    onRender: function() {
        var me = this,
            target = me.getCollapseTarget(),
            collapseDir = me.getCollapseDirection();

        Ext.applyIf(me.renderData, {
            collapseDir: collapseDir,
            collapsible: me.collapsible || target.collapsible
        });
        Ext.applyIf(me.renderSelectors, {
            collapseEl: '.' + Ext.baseCSSPrefix + 'collapse-el'
        });

        Ext.resizer.Splitter.superclass.onRender.apply(me, arguments);

        // Add listeners on the mini-collapse tool unless performCollapse is set to false
        if (me.performCollapse !== false) {
            if (me.renderData.collapsible) {
                me.mon(me.collapseEl, 'click', me.toggleTargetCmp, me);
            }
            if (me.collapseOnDblClick) {
                me.mon(me.el, 'dblclick', me.toggleTargetCmp, me);
            }
        }

        // Ensure the mini collapse icon is set to the correct direction when the target is collapsed/expanded by any means
        me.mon(target, 'collapse', me.onTargetCollapse, me);
        me.mon(target, 'expand', me.onTargetExpand, me);

        me.el.addCls(me.baseCls + '-' + me.orientation);
        me.el.unselectable();

        me.tracker = Ext.create('Ext.resizer.SplitterTracker', {
            el: me.el
        });
    },

    getCollapseDirection: function() {
        var me = this,
            idx,
            type = me.ownerCt.layout.type;

        // Avoid duplication of string tests.
        // Create a two bit truth table of the configuration of the Splitter:
        // Collapse Target | orientation
        //        0              0             = next, horizontal
        //        0              1             = next, vertical
        //        1              0             = prev, horizontal
        //        1              1             = prev, vertical
        if (me.collapseTarget.isComponent) {
            idx = Number(me.ownerCt.items.indexOf(me.collapseTarget) == me.ownerCt.items.indexOf(me) - 1) << 1 | Number(type == 'hbox');
        } else {
            idx = Number(me.collapseTarget == 'prev') << 1 | Number(type == 'hbox');
        }

        // Read the data out the truth table
        me.orientation = ['horizontal', 'vertical'][idx & 1];
        return ['down', 'right', 'up', 'left'][idx];
    },

    getCollapseTarget: function() {
        return this.collapseTarget.isComponent ? this.collapseTarget : this.collapseTarget == 'prev' ? this.previousSibling() : this.nextSibling();
    },

    onTargetCollapse: function(target) {
        this.el.addCls(this.collapsedCls);
    },

    onTargetExpand: function(target) {
        this.el.removeCls(this.collapsedCls);
    },

    toggleTargetCmp: function(e, t) {
        var cmp = this.getCollapseTarget();

        if (cmp.isVisible()) {
            // restore
            if (cmp.collapsed) {
                cmp.expand(cmp.animCollapse);
            // collapse
            } else {
                cmp.collapse(null, cmp.animCollapse);
            }
        }
    }
}, function() {
    this.prototype.renderTpl = new Ext.XTemplate(
        '
 '
    );
});