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-rw-r--r--toolkit/content/treeUtils.js78
1 files changed, 78 insertions, 0 deletions
diff --git a/toolkit/content/treeUtils.js b/toolkit/content/treeUtils.js
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+// -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+var gTreeUtils = {
+ deleteAll: function (aTree, aView, aItems, aDeletedItems)
+ {
+ for (var i = 0; i < aItems.length; ++i)
+ aDeletedItems.push(aItems[i]);
+ aItems.splice(0, aItems.length);
+ var oldCount = aView.rowCount;
+ aView._rowCount = 0;
+ aTree.treeBoxObject.rowCountChanged(0, -oldCount);
+ },
+
+ deleteSelectedItems: function (aTree, aView, aItems, aDeletedItems)
+ {
+ var selection = aTree.view.selection;
+ selection.selectEventsSuppressed = true;
+
+ var rc = selection.getRangeCount();
+ for (var i = 0; i < rc; ++i) {
+ var min = { }; var max = { };
+ selection.getRangeAt(i, min, max);
+ for (let j = min.value; j <= max.value; ++j) {
+ aDeletedItems.push(aItems[j]);
+ aItems[j] = null;
+ }
+ }
+
+ var nextSelection = 0;
+ for (i = 0; i < aItems.length; ++i) {
+ if (!aItems[i]) {
+ let j = i;
+ while (j < aItems.length && !aItems[j])
+ ++j;
+ aItems.splice(i, j - i);
+ nextSelection = j < aView.rowCount ? j - 1 : j - 2;
+ aView._rowCount -= j - i;
+ aTree.treeBoxObject.rowCountChanged(i, i - j);
+ }
+ }
+
+ if (aItems.length) {
+ selection.select(nextSelection);
+ aTree.treeBoxObject.ensureRowIsVisible(nextSelection);
+ aTree.focus();
+ }
+ selection.selectEventsSuppressed = false;
+ },
+
+ sort: function (aTree, aView, aDataSet, aColumn, aComparator,
+ aLastSortColumn, aLastSortAscending)
+ {
+ var ascending = (aColumn == aLastSortColumn) ? !aLastSortAscending : true;
+ if (aDataSet.length == 0)
+ return ascending;
+
+ var numericSort = !isNaN(aDataSet[0][aColumn]);
+ var sortFunction = null;
+ if (aComparator) {
+ sortFunction = function (a, b) { return aComparator(a[aColumn], b[aColumn]); };
+ }
+ aDataSet.sort(sortFunction);
+ if (!ascending)
+ aDataSet.reverse();
+
+ aTree.view.selection.clearSelection();
+ aTree.view.selection.select(0);
+ aTree.treeBoxObject.invalidate();
+ aTree.treeBoxObject.ensureRowIsVisible(0);
+
+ return ascending;
+ }
+};
+