1/*
2 * Copyright (C) 2013 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26WebInspector.ScopeBar = function(identifier, items, defaultItem) {
27    WebInspector.NavigationItem.call(this, identifier);
28
29    this._element.classList.add(WebInspector.ScopeBar.StyleClassName);
30
31    this._items = items;
32    this._defaultItem = defaultItem;
33
34    this._itemsById = [];
35    this._populate();
36};
37
38WebInspector.ScopeBar.StyleClassName = "scope-bar";
39WebInspector.ScopeBar.Event = {
40    SelectionChanged: "scopebar-selection-did-change"
41};
42
43WebInspector.ScopeBar.prototype = {
44    constructor: WebInspector.ScopeBar,
45
46    // Public
47
48    get defaultItem()
49    {
50        return this._defaultItem;
51    },
52
53    item: function(id)
54    {
55        return this._itemsById[id];
56    },
57
58    get selectedItems()
59    {
60        return this._items.filter(function(item) {
61            return item.selected;
62        });
63    },
64
65    updateLayout: function(expandOnly)
66    {
67        if (expandOnly)
68            return;
69
70        for (var i = 0; i < this._items.length; ++i) {
71            var item = this._items[i];
72            var isSelected = item.selected;
73
74            if (!isSelected)
75                item.element.classList.add(WebInspector.ScopeBarItem.SelectedStyleClassName);
76
77            var selectedWidth = item.element.offsetWidth;
78            if (selectedWidth)
79                item.element.style.minWidth = selectedWidth + "px";
80
81            if (!isSelected)
82                item.element.classList.remove(WebInspector.ScopeBarItem.SelectedStyleClassName);
83        }
84    },
85
86    // Private
87
88    _populate: function()
89    {
90        var item;
91        for (var i = 0; i < this._items.length; ++i) {
92            item = this._items[i];
93            this._itemsById[item.id] = item;
94            this._element.appendChild(item.element);
95
96            item.addEventListener(WebInspector.ScopeBarItem.Event.SelectionChanged, this._itemSelectionDidChange, this);
97        }
98
99        if (!this.selectedItems.length && this._defaultItem)
100            this._defaultItem.selected = true;
101    },
102
103    _itemSelectionDidChange: function(event)
104    {
105        var sender = event.target;
106        var item;
107
108        // An exclusive item was selected, unselect everything else.
109        if (sender.isExclusive && sender.selected) {
110            for (var i = 0; i < this._items.length; ++i) {
111                item = this._items[i];
112                if (item !== sender)
113                    item.selected = false;
114            }
115        } else {
116            var replacesCurrentSelection = !event.data.withModifier;
117            for (var i = 0; i < this._items.length; ++i) {
118                item = this._items[i];
119                if (item.isExclusive && item !== sender && sender.selected)
120                    item.selected = false;
121                else if (sender.selected && replacesCurrentSelection && sender !== item)
122                    item.selected = false;
123            }
124        }
125
126        // If nothing is selected anymore, select the default item.
127        if (!this.selectedItems.length && this._defaultItem)
128            this._defaultItem.selected = true;
129
130        this.dispatchEventToListeners(WebInspector.ScopeBar.Event.SelectionChanged);
131    }
132};
133
134WebInspector.ScopeBar.prototype.__proto__ = WebInspector.NavigationItem.prototype;
135