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Serenity Operating System
1/*
2 * Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@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 "History.h"
28#include "ManualModel.h"
29#include <AK/ByteBuffer.h>
30#include <LibCore/File.h>
31#include <LibGUI/AboutDialog.h>
32#include <LibGUI/Action.h>
33#include <LibGUI/Application.h>
34#include <LibGUI/BoxLayout.h>
35#include <LibGUI/Menu.h>
36#include <LibGUI/MenuBar.h>
37#include <LibGUI/MessageBox.h>
38#include <LibGUI/Splitter.h>
39#include <LibGUI/TextEditor.h>
40#include <LibGUI/ToolBar.h>
41#include <LibGUI/TreeView.h>
42#include <LibGUI/Window.h>
43#include <LibMarkdown/MDDocument.h>
44#include <LibWeb/HtmlView.h>
45#include <LibWeb/Layout/LayoutNode.h>
46#include <LibWeb/Parser/CSSParser.h>
47#include <LibWeb/Parser/HTMLParser.h>
48#include <libgen.h>
49#include <stdio.h>
50#include <string.h>
51
52int main(int argc, char* argv[])
53{
54#ifdef __serenity__
55 if (pledge("stdio shared_buffer accept rpath unix cpath fattr", nullptr) < 0) {
56 perror("pledge");
57 return 1;
58 }
59#endif
60
61 GUI::Application app(argc, argv);
62
63#ifdef __serenity__
64 if (pledge("stdio shared_buffer accept rpath", nullptr) < 0) {
65 perror("pledge");
66 return 1;
67 }
68#endif
69
70 if (unveil("/res", "r") < 0) {
71 perror("unveil");
72 return 1;
73 }
74
75 if (unveil("/usr/share/man", "r") < 0) {
76 perror("unveil");
77 return 1;
78 }
79
80 unveil(nullptr, nullptr);
81
82 auto window = GUI::Window::construct();
83 window->set_title("Help");
84 window->set_rect(300, 200, 570, 500);
85
86 auto& widget = window->set_main_widget<GUI::Widget>();
87 widget.set_layout<GUI::VerticalBoxLayout>();
88 widget.layout()->set_spacing(0);
89
90 auto& toolbar = widget.add<GUI::ToolBar>();
91
92 auto& splitter = widget.add<GUI::HorizontalSplitter>();
93
94 auto model = ManualModel::create();
95
96 auto& tree_view = splitter.add<GUI::TreeView>();
97 tree_view.set_model(model);
98 tree_view.set_size_policy(GUI::SizePolicy::Fixed, GUI::SizePolicy::Fill);
99 tree_view.set_preferred_size(200, 500);
100
101 auto& html_view = splitter.add<Web::HtmlView>();
102
103 History history;
104
105 RefPtr<GUI::Action> go_back_action;
106 RefPtr<GUI::Action> go_forward_action;
107
108 auto update_actions = [&]() {
109 go_back_action->set_enabled(history.can_go_back());
110 go_forward_action->set_enabled(history.can_go_forward());
111 };
112
113 auto open_page = [&](const String& path) {
114 if (path.is_null()) {
115 html_view.set_document(nullptr);
116 return;
117 }
118
119 dbg() << "Opening page at " << path;
120
121 auto file = Core::File::construct();
122 file->set_filename(path);
123
124 if (!file->open(Core::IODevice::OpenMode::ReadOnly)) {
125 int saved_errno = errno;
126 GUI::MessageBox::show(strerror(saved_errno), "Failed to open man page", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window);
127 return;
128 }
129 auto buffer = file->read_all();
130 StringView source { (const char*)buffer.data(), buffer.size() };
131
132 MDDocument md_document;
133 bool success = md_document.parse(source);
134 ASSERT(success);
135
136 String html = md_document.render_to_html();
137 auto html_document = Web::parse_html_document(html);
138 html_view.set_document(html_document);
139
140 String page_and_section = model->page_and_section(tree_view.selection().first());
141 window->set_title(String::format("%s - Help", page_and_section.characters()));
142 };
143
144 tree_view.on_selection_change = [&] {
145 String path = model->page_path(tree_view.selection().first());
146 if (path.is_null()) {
147 html_view.set_document(nullptr);
148 return;
149 }
150 history.push(path);
151 update_actions();
152 open_page(path);
153 };
154
155 html_view.on_link_click = [&](const String& href) {
156 char* current_path = strdup(history.current().characters());
157 char* dir_path = dirname(current_path);
158 char* path = realpath(String::format("%s/%s", dir_path, href.characters()).characters(), nullptr);
159 free(current_path);
160 history.push(path);
161 update_actions();
162 open_page(path);
163 free(path);
164 };
165
166 go_back_action = GUI::CommonActions::make_go_back_action([&](auto&) {
167 history.go_back();
168 update_actions();
169 open_page(history.current());
170 });
171
172 go_forward_action = GUI::CommonActions::make_go_forward_action([&](auto&) {
173 history.go_forward();
174 update_actions();
175 open_page(history.current());
176 });
177
178 go_back_action->set_enabled(false);
179 go_forward_action->set_enabled(false);
180
181 toolbar.add_action(*go_back_action);
182 toolbar.add_action(*go_forward_action);
183
184 auto menubar = make<GUI::MenuBar>();
185
186 auto& app_menu = menubar->add_menu("Help");
187 app_menu.add_action(GUI::Action::create("About", [&](const GUI::Action&) {
188 GUI::AboutDialog::show("Help", Gfx::Bitmap::load_from_file("/res/icons/16x16/book.png"), window);
189 }));
190 app_menu.add_separator();
191 app_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
192 GUI::Application::the().quit(0);
193 }));
194
195 auto& go_menu = menubar->add_menu("Go");
196 go_menu.add_action(*go_back_action);
197 go_menu.add_action(*go_forward_action);
198
199 app.set_menubar(move(menubar));
200
201 window->set_focused_widget(&tree_view);
202 window->show();
203
204 window->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/book.png"));
205
206 return app.exec();
207}