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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
[ChromeOnly,
Exposed=Window]
interface TreeColumns {
/**
* The tree widget for these columns.
*/
readonly attribute XULTreeElement? tree;
/**
* The number of columns.
*/
readonly attribute unsigned long count;
/**
* An alias for count (for the benefit of scripts which treat this as an
* array).
*/
readonly attribute unsigned long length;
/**
* Get the first/last column.
*/
TreeColumn? getFirstColumn();
TreeColumn? getLastColumn();
/**
* Attribute based column getters.
*/
TreeColumn? getPrimaryColumn();
TreeColumn? getSortedColumn();
TreeColumn? getKeyColumn();
/**
* Get the column for the given element.
*/
TreeColumn? getColumnFor(Element? element);
/**
* Parametric column getters.
*/
getter TreeColumn? getNamedColumn(DOMString name);
getter TreeColumn? getColumnAt(unsigned long index);
/**
* This method is called whenever a treecol is added or removed and
* the column cache needs to be rebuilt.
*/
undefined invalidateColumns();
};