CharacterMap+Base: Add man page for Character Map :^)

Base/usr/share/man/man1/CharacterMap.md

@@ -0,0 +1,32 @@
+## Name
+
+Character Map
+
+[Open](file:///bin/CharacterMap)
+
+## Synopsis
+
+```**sh
+$ CharacterMap
+$ CharacterMap --search "yak"
+```
+
+## Description
+
+Character Map is a GUI application for viewing, searching for, and copying Unicode characters. Alternatively, you can use it to search for characters by name, from the command line.
+
+## Examples
+
+To open Character Map:
+```sh
+$ CharacterMap
+```
+
+To view a list of all characters that have "yak" in their name:
+```sh
+$ CharacterMap --search "yak"
+```
+
+## See Also
+
+* [`FontEditor`(1)](help://man/1/FontEditor) To edit the fonts instead of just viewing them.

Userland/Applications/CharacterMap/CMakeLists.txt

@@ -16,5 +16,5 @@ set(SOURCES
 )
 
 serenity_app(CharacterMap ICON app-keyboard-settings)
-target_link_libraries(CharacterMap LibGUI LibMain)
+target_link_libraries(CharacterMap LibDesktop LibGUI LibMain)
 link_with_unicode_data(CharacterMap)

Userland/Applications/CharacterMap/CharacterMapWidget.cpp

@@ -9,6 +9,7 @@
 #include <AK/StringUtils.h>
 #include <Applications/CharacterMap/CharacterMapWindowGML.h>
 #include <LibConfig/Client.h>
+#include <LibDesktop/Launcher.h>
 #include <LibGUI/Action.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/Clipboard.h>
@@ -134,6 +135,9 @@ void CharacterMapWidget::initialize_menubar(GUI::Window& window)
     }));
 
     auto& help_menu = window.add_menu("&Help");
+    help_menu.add_action(GUI::CommonActions::make_help_action([&](auto&) {
+        Desktop::Launcher::open(URL::create_with_file_protocol("/usr/share/man/man1/CharacterMap.md"), "/bin/Help");
+    }));
     help_menu.add_action(GUI::CommonActions::make_about_action("Character Map", GUI::Icon::default_icon("app-keyboard-settings"), &window));
 }
 

Userland/Applications/CharacterMap/main.cpp

@@ -6,9 +6,11 @@
 
 #include "CharacterMapWidget.h"
 #include "SearchCharacters.h"
+#include <AK/URL.h>
 #include <LibConfig/Client.h>
 #include <LibCore/ArgsParser.h>
 #include <LibCore/System.h>
+#include <LibDesktop/Launcher.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/Icon.h>
 #include <LibGUI/Window.h>
@@ -43,6 +45,9 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     auto app = TRY(GUI::Application::try_create(arguments));
     Config::pledge_domains("CharacterMap");
 
+    TRY(Desktop::Launcher::add_allowed_handler_with_only_specific_urls("/bin/Help", { URL::create_with_file_protocol("/usr/share/man/man1/CharacterMap.md") }));
+    TRY(Desktop::Launcher::seal_allowlist());
+
     TRY(Core::System::pledge("stdio recvfd sendfd rpath"));
     TRY(Core::System::unveil("/res", "r"));
     TRY(Core::System::unveil(nullptr, nullptr));