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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
WI.TreeOutlineGroup = class TreeOutlineGroup extends WI.Collection
{
constructor()
{
super((object) => object instanceof WI.TreeOutline);
}
// Static
static groupForTreeOutline(treeOutline)
{
return treeOutline[WI.TreeOutlineGroup.GroupForTreeOutlineSymbol] || null;
}
// Public
get selectedTreeElement()
{
for (let treeOutline of this.items) {
if (treeOutline.selectedTreeElement)
return treeOutline.selectedTreeElement;
}
return null;
}
// Protected
itemAdded(treeOutline)
{
console.assert(!treeOutline[WI.TreeOutlineGroup.GroupForTreeOutlineSymbol]);
treeOutline[WI.TreeOutlineGroup.GroupForTreeOutlineSymbol] = this;
if (treeOutline.selectedTreeElement)
this._removeConflictingTreeSelections(treeOutline.selectedTreeElement);
}
itemRemoved(treeOutline)
{
console.assert(treeOutline[WI.TreeOutlineGroup.GroupForTreeOutlineSymbol] === this);
treeOutline[WI.TreeOutlineGroup.GroupForTreeOutlineSymbol] = null;
}
didSelectTreeElement(treeElement)
{
// Called by TreeOutline.
if (!treeElement)
return;
this._removeConflictingTreeSelections(treeElement);
}
// Private
_removeConflictingTreeSelections(treeElement)
{
let selectedTreeOutline = treeElement.treeOutline;
console.assert(selectedTreeOutline, "Should have a parent tree outline.");
for (let treeOutline of this.items) {
if (selectedTreeOutline === treeOutline)
continue;
if (treeOutline.selectedTreeElement)
treeOutline.selectedTreeElement.deselect();
}
}
};
WI.TreeOutlineGroup.GroupForTreeOutlineSymbol = Symbol("group-for-tree-outline");
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