/**
 * This is a layout that inherits the anchoring of {@link Ext.layout.container.Anchor} and adds the
 * ability for x/y positioning using the standard x and y component config options.
 *
 * This class is intended to be extended or created via the
 * {@link Ext.container.Container#layout layout} configuration property.
 * See {@link Ext.container.Container#layout} for additional details.
 *
 *     @example
 *     Ext.create('Ext.form.Panel', {
 *         title: 'Absolute Layout',
 *         width: 300,
 *         height: 275,
 *         layout: {
 *             type: 'absolute'
 *             // layout-specific configs go here
 *             //itemCls: 'x-abs-layout-item',
 *         },
 *         url:'save-form.php',
 *         defaultType: 'textfield',
 *         items: [{
 *             x: 10,
 *             y: 10,
 *             xtype:'label',
 *             text: 'Send To:'
 *         },{
 *             x: 80,
 *             y: 10,
 *             name: 'to',
 *             anchor:'90%'  // anchor width by percentage
 *         },{
 *             x: 10,
 *             y: 40,
 *             xtype:'label',
 *             text: 'Subject:'
 *         },{
 *             x: 80,
 *             y: 40,
 *             name: 'subject',
 *             anchor: '90%'  // anchor width by percentage
 *         },{
 *             x:0,
 *             y: 80,
 *             xtype: 'textareafield',
 *             name: 'msg',
 *             anchor: '100% 100%'  // anchor width and height
 *         }],
 *         renderTo: Ext.getBody()
 *     });
 */
Ext.define('Ext.layout.container.Absolute', {

    /* Begin Definitions */

    alias: 'layout.absolute',
    extend: 'Ext.layout.container.Anchor',
    alternateClassName: 'Ext.layout.AbsoluteLayout',

    /* End Definitions */

    targetCls: Ext.baseCSSPrefix + 'abs-layout-ct',
    itemCls: Ext.baseCSSPrefix + 'abs-layout-item',

    type: 'absolute',

    /**
     * @private
     */
    adjustWidthAnchor: function(width, childContext) {
        var padding = this.targetPadding,
            x = childContext.getStyle('left');

        return width - x + padding.left;
    },

    /**
     * @private
     */
    adjustHeightAnchor: function(height, childContext) {
        var padding = this.targetPadding,
            y = childContext.getStyle('top');

        return height - y + padding.top;
    },

    isItemShrinkWrap: function(item) {
        return true;
    },

    onContentChange: function(comp, context) {
        var ret = false;

        // In a vast majority of cases we don't need to run the layout
        // when the content changes.
        if (comp.anchor && context && context.show) {
            ret = this.callParent([comp, context]);
        }

        return ret;
    },

    beginLayout: function(ownerContext) {
        var me = this,
            target = me.getTarget();

        me.callParent([ownerContext]);

        // Do not set position: relative; when the absolute layout target is the body
        if (target.dom !== document.body) {
            target.position();
        }

        me.targetPadding = ownerContext.targetContext.getPaddingInfo();
    },

    isItemBoxParent: function(itemContext) {
        return true;
    },

    calculateContentSize: function(ownerContext, dimensions) {
        var me = this,
            containerDimensions = (dimensions || 0) |
                   ((ownerContext.widthModel.shrinkWrap ? 1 : 0) |
                    (ownerContext.heightModel.shrinkWrap ? 2 : 0)),
            calcWidth = (containerDimensions & 1) || undefined,
            calcHeight = (containerDimensions & 2) || undefined,
            childItems = ownerContext.childItems,
            length = childItems.length,
            contentHeight = 0,
            contentWidth = 0,
            needed = 0,
            props = ownerContext.props,
            targetPadding, child, childContext, height, i, margins, width;

        if (calcWidth) {
            if (isNaN(props.contentWidth)) {
                ++needed;
            }
            else {
                calcWidth = undefined;
            }
        }

        if (calcHeight) {
            if (isNaN(props.contentHeight)) {
                ++needed;
            }
            else {
                calcHeight = undefined;
            }
        }

        if (needed) {
            for (i = 0; i < length; ++i) {
                childContext = childItems[i];
                child = childContext.target;
                height = calcHeight && childContext.getProp('height');
                width = calcWidth && childContext.getProp('width');
                margins = childContext.getMarginInfo();

                height += margins.bottom;
                width += margins.right;

                contentHeight = Math.max(contentHeight, (child.y || 0) + height);
                contentWidth = Math.max(contentWidth, (child.x || 0) + width);

                if (isNaN(contentHeight) && isNaN(contentWidth)) {
                    me.done = false;

                    return;
                }
            }

            if (calcWidth || calcHeight) {
                targetPadding = ownerContext.targetContext.getPaddingInfo();
            }

            if (calcWidth && !ownerContext.setContentWidth(contentWidth + targetPadding.width)) {
                me.done = false;
            }

            // eslint-disable-next-line max-len
            if (calcHeight && !ownerContext.setContentHeight(contentHeight + targetPadding.height)) {
                me.done = false;
            }
        }
    }
});