/*
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)
*/
/**
 * Layout class for {@link Ext.form.field.TextArea} fields. Handles sizing the textarea field.
 * @private
 */
Ext.define('Ext.layout.component.field.TextArea', {
    extend: 'Ext.layout.component.field.Text',
    alias: 'layout.textareafield',

    type: 'textareafield',
    
    canGrowWidth: false,
    
    naturalSizingProp: 'cols',
    
    beginLayout: function(ownerContext){
        this.callParent(arguments);
        ownerContext.target.inputEl.setStyle('height', '');
    },

    measureContentHeight: function (ownerContext) {
        var me = this,
            owner = me.owner,
            height = me.callParent(arguments),
            inputContext, inputEl, value, max, curWidth, calcHeight;

        if (owner.grow && !ownerContext.state.growHandled) {
            inputContext = ownerContext.inputContext;
            inputEl = owner.inputEl;
            curWidth = inputEl.getWidth(true); //subtract border/padding to get the available width for the text

            // Get and normalize the field value for measurement
            value = Ext.util.Format.htmlEncode(inputEl.dom.value) || '&#160;';
            value += owner.growAppend;
            
            // Translate newlines to <br> tags
            value = value.replace(/\n/g, '<br/>');

            // Find the height that contains the whole text value
            calcHeight = Ext.util.TextMetrics.measure(inputEl, value, curWidth).height +
                         inputContext.getBorderInfo().height + inputContext.getPaddingInfo().height;

            // Constrain
            calcHeight = Ext.Number.constrain(calcHeight, owner.growMin, owner.growMax);
            inputContext.setHeight(calcHeight);
            ownerContext.state.growHandled = true;
            
            // Now that we've set the inputContext, we need to recalculate the width
            inputContext.domBlock(me, 'height');
            height = NaN;
        }
        return height;
    }
});
