CMake: Add service, desktop, and icon files for Linux-like systems

These files are lifted from the ladybird-gtk4 repository and adapted
to work with the Qt UI port. They are installed by default on Linux, but
can be installed via a CMake option on other platforms.

Co-Authored-By: Sergey Bugaev <bugaevc@serenityos.org>
Co-Authored-By: Nicolas Ramz <nicolas.ramz@adevinta.com>
Co-Authored-By: Beckett Normington <beckett@b0ba.dev>
Co-Authored-By: Xexxa <93391300+Xexxa@users.noreply.github.com>

Author: 5 people

Meta/CMake/common_options.cmake

@@ -32,8 +32,15 @@ ladybird_option(ENABLE_NETWORK_DOWNLOADS ON CACHE BOOL "Allow downloads of requi
 ladybird_option(ENABLE_CLANG_PLUGINS OFF CACHE BOOL "Enable building with the Clang plugins")
 ladybird_option(ENABLE_CLANG_PLUGINS_INVALID_FUNCTION_MEMBERS OFF CACHE BOOL "Enable detecting invalid function types as members of GC-allocated objects")
 
+if (LINUX AND NOT ANDROID)
+    set(freedesktop_files_default ON)
+else()
+    set(freedesktop_files_default OFF)
+endif()
+
 ladybird_option(ENABLE_GUI_TARGETS ON CACHE BOOL "Enable building GUI targets")
 ladybird_option(ENABLE_INSTALL_HEADERS ON CACHE BOOL "Enable installing headers")
+ladybird_option(ENABLE_INSTALL_FREEDESKTOP_FILES ${freedesktop_files_default} CACHE BOOL "Enable installing .desktop and .service files")
 ladybird_option(ENABLE_SWIFT OFF CACHE BOOL "Enable building Swift files")
 ladybird_option(ENABLE_STD_STACKTRACE OFF CACHE BOOL "Force use of std::stacktrace instead of libbacktrace. If it is not supported the build will fail")
 ladybird_option(ENABLE_WINDOWS_CI OFF CACHE BOOL "Enable building targets supported on Windows for CI")

Meta/CMake/freedesktop/org.ladybird.Ladybird.desktop

@@ -0,0 +1,24 @@
+[Desktop Entry]
+Name=Ladybird
+GenericName=Web Browser
+GenericName[eo]=Retumilo
+GenericName[fr]=Navigateur Web
+GenericName[ru]=Веб-браузер
+GenericName[sv]=Webbläsare
+Exec=Ladybird --force-new-process %U
+Icon=org.ladybird.Ladybird
+DBusActivatable=false
+Type=Application
+Categories=Network;WebBrowser;Qt;KDE;
+StartupNotify=false
+MimeType=text/html;application/xhtml+xml;x-scheme-handler/http;x-scheme-handler/https;
+Actions=new-window;
+X-Purism-FormFactor=Workstation;
+
+[Desktop Action new-window]
+Name=New Window
+Name[eo]=Nova fenestro
+Name[fr]=Nouvelle Fenêtre
+Name[ru]=Новое окно
+Name[sv]=Nytt fönster
+Exec=Ladybird --new-window

Meta/CMake/freedesktop/org.ladybird.Ladybird.service

@@ -0,0 +1,3 @@
+[D-BUS Service]
+Name=org.ladybird.Ladybird
+Exec=Ladybird --force-new-process

Meta/CMake/freedesktop/org.ladybird.Ladybird.svg

@@ -109,3 +109,22 @@ if (NOT APPLE)
     # On macOS the resources are handled via the MACOSX_PACKAGE_LOCATION property on each resource file
     install_ladybird_resources("${CMAKE_INSTALL_DATADIR}/Lagom" ladybird_Runtime)
 endif()
+
+if (ENABLE_INSTALL_FREEDESKTOP_FILES)
+    set(FREEDESKTOP_RESOURCE_DIR "${LADYBIRD_SOURCE_DIR}/Meta/CMake/freedesktop")
+    install(FILES
+        "${FREEDESKTOP_RESOURCE_DIR}/org.ladybird.Ladybird.svg"
+        DESTINATION "${CMAKE_INSTALL_DATADIR}/icons/hicolor/scalable/apps"
+        COMPONENT ladybird_Runtime
+    )
+    install(FILES
+        "${FREEDESKTOP_RESOURCE_DIR}/org.ladybird.Ladybird.desktop"
+        DESTINATION "${CMAKE_INSTALL_DATADIR}/applications"
+        COMPONENT ladybird_Runtime
+    )
+    install(FILES
+        "${FREEDESKTOP_RESOURCE_DIR}/org.ladybird.Ladybird.service"
+        DESTINATION "${CMAKE_INSTALL_DATADIR}/dbus-1/services"
+        COMPONENT ladybird_Runtime
+    )
+endif()