/*
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)
*/
/**
 * @class Ext.layout.component.Draw
 * @private
 *
 */

Ext.define('Ext.layout.component.Draw', {

    /* Begin Definitions */

    alias: 'layout.draw',

    extend: 'Ext.layout.component.Auto',

    setHeightInDom: true,

    setWidthInDom: true,

    /* End Definitions */

    type: 'draw',
    
    measureContentWidth : function (ownerContext) {
        var target = ownerContext.target,
            paddingInfo = ownerContext.getPaddingInfo(),
            bbox = this.getBBox(ownerContext);
            
        if (!target.viewBox) {
            if (target.autoSize) {
                return bbox.width + paddingInfo.width;
            } else {
                return bbox.x + bbox.width + paddingInfo.width;
            }
        } else {
            if (ownerContext.heightModel.shrinkWrap) {
                return paddingInfo.width;
            } else {
                return bbox.width / bbox.height * (ownerContext.getProp('contentHeight') - paddingInfo.height) + paddingInfo.width;
            }
        }
    },
    
    measureContentHeight : function (ownerContext) {
        var target = ownerContext.target,
            paddingInfo = ownerContext.getPaddingInfo(),
            bbox = this.getBBox(ownerContext);
            
        if (!ownerContext.target.viewBox) {
            if (target.autoSize) {
                return bbox.height + paddingInfo.height;
            } else {
                return bbox.y + bbox.height + paddingInfo.height;
            }
        } else {
            if (ownerContext.widthModel.shrinkWrap) {
                return paddingInfo.height;
            } else {
                return bbox.height / bbox.width * (ownerContext.getProp('contentWidth') - paddingInfo.width) + paddingInfo.height;
            }
        }
    },
    
    getBBox: function(ownerContext) {
        var bbox = ownerContext.surfaceBBox;
        if (!bbox) {
            bbox = ownerContext.target.surface.items.getBBox();
            // If the surface is empty, we'll get these values, normalize them
            if (bbox.width === -Infinity && bbox.height === -Infinity) {
                bbox.width = bbox.height = bbox.x = bbox.y = 0;
            }
            ownerContext.surfaceBBox = bbox;
        }
        return bbox;
    },

    publishInnerWidth: function (ownerContext, width) {
        ownerContext.setContentWidth(width - ownerContext.getFrameInfo().width, true);
    },
    
    publishInnerHeight: function (ownerContext, height) {
        ownerContext.setContentHeight(height - ownerContext.getFrameInfo().height, true);
    },
    
    finishedLayout: function (ownerContext) {
        // TODO: Is there a better way doing this?
        var props = ownerContext.props,
            paddingInfo = ownerContext.getPaddingInfo();

        // We don't want the cost of getProps, so we just use the props data... this is ok
        // because all the props have been calculated by this time
        this.owner.setSurfaceSize(props.contentWidth - paddingInfo.width, props.contentHeight - paddingInfo.height);
        
        // calls afterComponentLayout, so we want the surface to be sized before that:
        this.callParent(arguments);
    }
});
