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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/Badge.h>
28#include <AK/JsonObject.h>
29#include <LibGUI/Layout.h>
30#include <LibGUI/Widget.h>
31
32namespace GUI {
33
34Layout::Layout()
35{
36}
37
38Layout::~Layout()
39{
40}
41
42void Layout::notify_adopted(Badge<Widget>, Widget& widget)
43{
44 if (m_owner == &widget)
45 return;
46 m_owner = widget.make_weak_ptr();
47}
48
49void Layout::notify_disowned(Badge<Widget>, Widget& widget)
50{
51 ASSERT(m_owner == &widget);
52 m_owner.clear();
53}
54
55void Layout::add_entry(Entry&& entry)
56{
57 m_entries.append(move(entry));
58 if (m_owner)
59 m_owner->notify_layout_changed({});
60}
61
62void Layout::add_spacer()
63{
64 Entry entry;
65 entry.type = Entry::Type::Spacer;
66 add_entry(move(entry));
67}
68
69void Layout::add_layout(OwnPtr<Layout>&& layout)
70{
71 Entry entry;
72 entry.type = Entry::Type::Layout;
73 entry.layout = move(layout);
74 add_entry(move(entry));
75}
76
77void Layout::add_widget(Widget& widget)
78{
79 Entry entry;
80 entry.type = Entry::Type::Widget;
81 entry.widget = widget.make_weak_ptr();
82 add_entry(move(entry));
83}
84
85void Layout::insert_widget_before(Widget& widget, Widget& before_widget)
86{
87 Entry entry;
88 entry.type = Entry::Type::Widget;
89 entry.widget = widget.make_weak_ptr();
90 m_entries.insert_before_matching(move(entry), [&](auto& existing_entry) {
91 return existing_entry.type == Entry::Type::Widget && existing_entry.widget.ptr() == &before_widget;
92 });
93 if (m_owner)
94 m_owner->notify_layout_changed({});
95}
96
97void Layout::remove_widget(Widget& widget)
98{
99 m_entries.remove_first_matching([&](auto& entry) {
100 return entry.widget == &widget;
101 });
102 if (m_owner)
103 m_owner->notify_layout_changed({});
104}
105
106void Layout::set_spacing(int spacing)
107{
108 if (m_spacing == spacing)
109 return;
110 m_spacing = spacing;
111 if (m_owner)
112 m_owner->notify_layout_changed({});
113}
114
115void Layout::set_margins(const Margins& margins)
116{
117 if (m_margins == margins)
118 return;
119 m_margins = margins;
120 if (m_owner)
121 m_owner->notify_layout_changed({});
122}
123
124void Layout::save_to(JsonObject& json)
125{
126 Core::Object::save_to(json);
127 json.set("spacing", m_spacing);
128
129 JsonObject margins_object;
130 margins_object.set("left", m_margins.left());
131 margins_object.set("right", m_margins.right());
132 margins_object.set("top", m_margins.top());
133 margins_object.set("bottom", m_margins.bottom());
134 json.set("margins", move(margins_object));
135
136 JsonArray entries_array;
137 for (auto& entry : m_entries) {
138 JsonObject entry_object;
139 if (entry.type == Entry::Type::Widget) {
140 entry_object.set("type", "Widget");
141 entry_object.set("widget", (FlatPtr)entry.widget.ptr());
142 } else if (entry.type == Entry::Type::Spacer) {
143 entry_object.set("type", "Spacer");
144 } else {
145 ASSERT_NOT_REACHED();
146 }
147 entries_array.append(move(entry_object));
148 }
149 json.set("entries", move(entries_array));
150}
151
152}