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+
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MozTreeView;
+
+dictionary TreeCellInfo {
+ long row = 0;
+ TreeColumn? col = null;
+ DOMString childElt = "";
+};
+
+[ChromeOnly,
+ Exposed=Window]
+interface XULTreeElement : XULElement
+{
+ [HTMLConstructor] constructor();
+
+ /**
+ * Obtain the columns.
+ */
+ readonly attribute TreeColumns? columns;
+
+ /**
+ * The view that backs the tree and that supplies it with its data.
+ * It is dynamically settable, either using a view attribute on the
+ * tree tag or by setting this attribute to a new value.
+ */
+ [SetterThrows, NeedsCallerType]
+ attribute MozTreeView? view;
+
+ /**
+ * Whether or not we are currently focused.
+ */
+ attribute boolean focused;
+
+ /**
+ * Obtain the treebody content node
+ */
+ readonly attribute Element? treeBody;
+
+ /**
+ * Obtain the height of a row.
+ */
+ readonly attribute long rowHeight;
+
+ /**
+ * Obtain the width of a row.
+ */
+ readonly attribute long rowWidth;
+
+ /**
+ * Get the pixel position of the horizontal scrollbar.
+ */
+ readonly attribute long horizontalPosition;
+
+ /**
+ * Get the index of the first visible row.
+ */
+ long getFirstVisibleRow();
+
+ /**
+ * Get the index of the last visible row.
+ */
+ long getLastVisibleRow();
+
+ /**
+ * Gets the number of possible visible rows.
+ */
+ long getPageLength();
+
+ /**
+ * Ensures that a row at a given index is visible.
+ */
+ undefined ensureRowIsVisible(long index);
+
+ /**
+ * Ensures that a given cell in the tree is visible.
+ */
+ [Throws]
+ undefined ensureCellIsVisible(long row, TreeColumn? col);
+
+ /**
+ * Scrolls such that the row at index is at the top of the visible view.
+ */
+ undefined scrollToRow(long index);
+
+ /**
+ * Scroll the tree up or down by numLines lines. Positive
+ * values move down in the tree. Prevents scrolling off the
+ * end of the tree.
+ */
+ undefined scrollByLines(long numLines);
+
+ /**
+ * Scroll the tree up or down by numPages pages. A page
+ * is considered to be the amount displayed by the tree.
+ * Positive values move down in the tree. Prevents scrolling
+ * off the end of the tree.
+ */
+ undefined scrollByPages(long numPages);
+
+ /**
+ * Invalidation methods for fine-grained painting control.
+ */
+ undefined invalidate();
+ undefined invalidateColumn(TreeColumn? col);
+ undefined invalidateRow(long index);
+ undefined invalidateCell(long row, TreeColumn? col);
+ undefined invalidateRange(long startIndex, long endIndex);
+
+ /**
+ * A hit test that can tell you what row the mouse is over.
+ * returns -1 for invalid mouse coordinates.
+ *
+ * The coordinate system is the client coordinate system for the
+ * document this tree lives in, and the units are CSS pixels.
+ */
+ long getRowAt(long x, long y);
+
+ /**
+ * A hit test that can tell you what cell the mouse is over.
+ * TreeCellInfo.row is the row index hit, returns -1 for invalid mouse
+ * coordinates. TreeCellInfo.col is the column hit.
+ * TreeCellInfo.childElt is the pseudoelement hit: this can have values of
+ * "cell", "twisty", "image", and "text".
+ *
+ * The coordinate system is the client coordinate system for the
+ * document this tree lives in, and the units are CSS pixels.
+ */
+ [Throws]
+ TreeCellInfo getCellAt(long x, long y);
+
+ /**
+ * Find the coordinates of an element within a specific cell.
+ */
+ [Throws]
+ DOMRect? getCoordsForCellItem(long row, TreeColumn col, DOMString element);
+
+ /**
+ * Determine if the text of a cell is being cropped or not.
+ */
+ [Throws]
+ boolean isCellCropped(long row, TreeColumn? col);
+
+ /**
+ * The view is responsible for calling these notification methods when
+ * rows are added or removed. Index is the position at which the new
+ * rows were added or at which rows were removed. For
+ * non-contiguous additions/removals, this method should be called multiple times.
+ */
+ undefined rowCountChanged(long index, long count);
+
+ /**
+ * Notify the tree that the view is about to perform a batch
+ * update, that is, add, remove or invalidate several rows at once.
+ * This must be followed by calling endUpdateBatch(), otherwise the tree
+ * will get out of sync.
+ */
+ undefined beginUpdateBatch();
+
+ /**
+ * Notify the tree that the view has completed a batch update.
+ */
+ undefined endUpdateBatch();
+
+ /**
+ * Called on a theme switch to flush out the tree's style and image caches.
+ */
+ undefined clearStyleAndImageCaches();
+
+ /**
+ * Remove an image source from the image cache to allow its invalidation.
+ */
+ [Throws]
+ undefined removeImageCacheEntry(long row, TreeColumn col);
+};