jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
3 * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
4 *
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8#include "AppletManager.h"
9#include <AK/QuickSort.h>
10#include <LibCore/EventLoop.h>
11#include <LibGfx/Painter.h>
12#include <WindowServer/MenuManager.h>
13
14namespace WindowServer {
15
16static AppletManager* s_the;
17Vector<DeprecatedString> order_vector;
18
19AppletManager::AppletManager()
20{
21 s_the = this;
22
23 auto order = g_config->read_entry("Applet", "Order");
24 order_vector = order.split(',');
25}
26
27AppletManager& AppletManager::the()
28{
29 VERIFY(s_the);
30 return *s_the;
31}
32
33void AppletManager::set_position(Gfx::IntPoint position)
34{
35 m_window->move_to(position);
36 m_window->set_visible(true);
37}
38
39void AppletManager::set_hovered_applet(Window* applet)
40{
41 if (m_hovered_applet == applet)
42 return;
43
44 if (m_hovered_applet)
45 Core::EventLoop::current().post_event(*m_hovered_applet, make<Event>(Event::WindowLeft));
46
47 m_hovered_applet = applet;
48
49 if (m_hovered_applet)
50 Core::EventLoop::current().post_event(*m_hovered_applet, make<Event>(Event::WindowEntered));
51}
52
53void AppletManager::event(Core::Event& event)
54{
55 if (event.type() == Event::WindowLeft && m_hovered_applet) {
56 set_hovered_applet(nullptr);
57 return;
58 }
59
60 if (!is<MouseEvent>(event))
61 return;
62 auto& mouse_event = static_cast<MouseEvent&>(event);
63
64 for (auto& applet : m_applets) {
65 if (!applet)
66 continue;
67 if (!applet->rect_in_applet_area().contains(mouse_event.position()))
68 continue;
69 auto local_event = mouse_event.translated(-applet->rect_in_applet_area().location());
70 set_hovered_applet(applet);
71 Core::EventLoop::current().post_event(*applet, make<MouseEvent>(local_event));
72 return;
73 }
74}
75
76void AppletManager::add_applet(Window& applet)
77{
78 m_applets.append(applet);
79
80 // Prune any dead weak pointers from the applet list.
81 m_applets.remove_all_matching([](auto& entry) {
82 return entry.is_null();
83 });
84
85 quick_sort(m_applets, [](auto& a, auto& b) {
86 auto index_a = order_vector.find_first_index(a->title());
87 auto index_b = order_vector.find_first_index(b->title());
88 return index_a.value_or(0) > index_b.value_or(0);
89 });
90
91 relayout();
92}
93
94void AppletManager::relayout()
95{
96 constexpr int applet_spacing = 4;
97 constexpr int applet_window_height = 19;
98 int total_width = 0;
99 for (auto& existing_applet : m_applets) {
100 total_width += max(0, existing_applet->size().width()) + applet_spacing;
101 }
102
103 if (total_width > 0)
104 total_width -= applet_spacing;
105
106 auto right_edge_x = total_width;
107
108 for (auto& existing_applet : m_applets) {
109 auto applet_size = existing_applet->size();
110 Gfx::IntRect new_applet_rect(right_edge_x - applet_size.width(), 0, applet_size.width(), applet_size.height());
111
112 Gfx::IntRect dummy_container_rect(0, 0, 0, applet_window_height);
113 new_applet_rect.center_vertically_within(dummy_container_rect);
114
115 existing_applet->set_rect_in_applet_area(new_applet_rect);
116 right_edge_x = existing_applet->rect_in_applet_area().x() - applet_spacing;
117 }
118
119 if (!m_window) {
120 m_window = Window::construct(*this, WindowType::AppletArea);
121 m_window->set_visible(false);
122 }
123
124 Gfx::IntRect rect { m_window->position(), Gfx::IntSize { total_width, applet_window_height } };
125 if (m_window->rect() == rect)
126 return;
127 m_window->set_rect(rect);
128
129 repaint();
130
131 WindowManager::the().tell_wms_applet_area_size_changed(rect.size());
132}
133
134void AppletManager::repaint()
135{
136 if (!m_window) {
137 return;
138 }
139
140 auto rect = Gfx::IntRect { { 0, 0 }, m_window->size() };
141
142 if (!rect.is_empty()) {
143 Gfx::Painter painter(*m_window->backing_store());
144 painter.fill_rect(rect, WindowManager::the().palette().button());
145 }
146}
147
148void AppletManager::did_change_theme()
149{
150 repaint();
151}
152
153void AppletManager::remove_applet(Window& applet)
154{
155 m_applets.remove_first_matching([&](auto& entry) {
156 return &applet == entry.ptr();
157 });
158
159 relayout();
160}
161
162void AppletManager::draw()
163{
164 for (auto& applet : m_applets) {
165 if (!applet)
166 continue;
167 draw_applet(*applet);
168 }
169}
170
171void AppletManager::draw_applet(Window const& applet)
172{
173 if (!applet.backing_store())
174 return;
175
176 Gfx::Painter painter(*m_window->backing_store());
177 Gfx::PainterStateSaver saver(painter);
178 painter.add_clip_rect(applet.rect_in_applet_area());
179 painter.fill_rect(applet.rect_in_applet_area(), WindowManager::the().palette().button());
180 painter.blit(applet.rect_in_applet_area().location(), *applet.backing_store(), applet.backing_store()->rect());
181}
182
183void AppletManager::invalidate_applet(Window const& applet, Gfx::IntRect const&)
184{
185 draw_applet(applet);
186 draw();
187 // FIXME: Invalidate only the exact rect we've been given.
188 if (m_window)
189 m_window->invalidate();
190}
191
192}