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/*
* Copyright (C) 2013, 2015 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.ScopeBar = class ScopeBar extends WI.NavigationItem
{
constructor(identifier, items, defaultItem, shouldGroupNonExclusiveItems)
{
super(identifier);
this._element.classList.add("scope-bar");
this._items = items;
this._defaultItem = defaultItem;
this._shouldGroupNonExclusiveItems = shouldGroupNonExclusiveItems || false;
for (let item of this._items)
item.scopeBar = this;
this._minimumWidth = 0;
this._populate();
this._element.addEventListener("keydown", this._handleKeyDown.bind(this));
}
// Public
get minimumWidth()
{
if (!this._minimumWidth) {
// If a "display: flex;" element is too small for its contents and
// has "flex-wrap: wrap;" set as well, this will cause the contents
// to wrap (potentially overflowing), thus preventing a proper
// measurement of the width of the element. Removing the "flex-wrap"
// property will ensure that the contents are rendered on one line.
this.element.style.flexWrap = "initial !important";
if (this._multipleItem)
this._multipleItem.displayWidestItem();
this._minimumWidth = this.element.realOffsetWidth;
this.element.style.flexWrap = null;
if (this._multipleItem)
this._multipleItem.displaySelectedItem();
}
return this._minimumWidth;
}
get defaultItem()
{
return this._defaultItem;
}
get items()
{
return this._items;
}
item(id)
{
return this._itemsById.get(id);
}
get selectedItems()
{
return this._items.filter((item) => item.selected);
}
hasNonDefaultItemSelected()
{
return this._items.some((item) => item.selected && item !== this._defaultItem);
}
resetToDefault()
{
let selectedItems = this.selectedItems;
if (selectedItems.length === 1 && selectedItems[0] === this._defaultItem)
return;
for (let item of this._items)
item.selected = false;
this._defaultItem.selected = true;
this.dispatchEventToListeners(WI.ScopeBar.Event.SelectionChanged);
}
// Private
_populate()
{
this._itemsById = new Map;
if (this._shouldGroupNonExclusiveItems) {
var nonExclusiveItems = [];
for (var item of this._items) {
this._itemsById.set(item.id, item);
if (!item.exclusive) {
nonExclusiveItems.push(item);
continue;
}
this._element.appendChild(item.element);
item.addEventListener(WI.ScopeBarItem.Event.SelectionChanged, this._itemSelectionDidChange, this);
}
this._multipleItem = new WI.MultipleScopeBarItem(nonExclusiveItems);
this._multipleItem.addEventListener(WI.ScopeBarItem.Event.SelectionChanged, this._itemSelectionDidChange, this);
this._element.appendChild(this._multipleItem.element);
} else {
for (var item of this._items) {
this._itemsById.set(item.id, item);
this._element.appendChild(item.element);
item.addEventListener(WI.ScopeBarItem.Event.SelectionChanged, this._itemSelectionDidChange, this);
}
}
if (this._defaultItem) {
if (!this.selectedItems.length)
this._defaultItem.selected = true;
this._element.classList.toggle("default-item-selected", this._defaultItem.selected);
}
}
_itemSelectionDidChange(event)
{
if (this._ignoreItemSelectedEvent)
return;
this._ignoreItemSelectedEvent = true;
let target = event.target;
if (target.selected) {
for (let item of this._items) {
if (item === target)
continue;
if (target === this._multipleItem && !item.exclusive)
continue;
if (event.data.extendSelection && !target.exclusive && !item.exclusive)
continue;
item.selected = false;
}
}
if (this._defaultItem) {
if (!this.selectedItems.length)
this._defaultItem.selected = true;
this._element.classList.toggle("default-item-selected", this._defaultItem.selected);
}
this.dispatchEventToListeners(WI.ScopeBar.Event.SelectionChanged);
this._ignoreItemSelectedEvent = false;
}
_handleKeyDown(event)
{
if (event.code === "ArrowLeft" || event.code === "ArrowRight") {
event.stop();
let focusedIndex = -1;
for (let i = 0; i < this._items.length; ++i) {
let element = this._items[i].element;
if (element === document.activeElement) {
focusedIndex = i;
break;
}
}
if (focusedIndex === -1)
return;
let delta = (event.code === "ArrowLeft") ? -1 : 1;
if (WI.resolveLayoutDirectionForElement(this._element) === WI.LayoutDirection.RTL)
delta *= -1;
focusedIndex += delta;
focusedIndex = (focusedIndex + this._items.length) % this._items.length;
this._items[focusedIndex].element.focus();
}
}
};
WI.ScopeBar.Event = {
SelectionChanged: "scopebar-selection-did-change"
};
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