Use GResources for the UI file and the LICENSE

- The About dialog now displays the licence.
 - The main UI file is now integrated into the binary.

The project needed some of its ugly CMake code back.

CMakeLists.txt

@@ -143,6 +143,7 @@ set (logdiag_TESTS
 	diagram)
 
 set (logdiag_SOURCES
+	${PROJECT_BINARY_DIR}/gresource.c
 	src/ld-window-main.c
 	src/logdiag.c)
 set (logdiag_HEADERS
@@ -175,6 +176,48 @@ endfunction ()
 
 glib_genmarshal (${PROJECT_SOURCE_DIR}/liblogdiag/ld-marshal.list ld_marshal)
 
+# Generate resources
+function (glib_compile_resources xml target)
+	find_program (GLIB_COMPILE_RESOURCES_EXECUTABLE glib-compile-resources)
+	if (NOT GLIB_COMPILE_RESOURCES_EXECUTABLE)
+		message (FATAL_ERROR "glib-compile-resources not found")
+	endif ()
+
+	# glib-compile-resources reads paths relative to its working directory
+	get_filename_component (_xml_path "${xml}" PATH)
+
+	# On Windows, the final Makefile may contain:
+	#   cd e:\abc && ...
+	# That won't actually change the directory. We have to do:
+	#   cd e:\abc && e: && ...
+	set (_prefix)
+	if (WIN32 AND "${_xml_path}" MATCHES "^.:[/\\\\]")
+		string (SUBSTRING "${_xml_path}" 0 2 _xml_drive)
+		set (_prefix ${_xml_drive} &&)
+	endif ()
+
+	# VERBATIM would cause problems, so it is not used here
+	add_custom_command (OUTPUT ${target}
+		COMMAND ${_prefix} ${GLIB_COMPILE_RESOURCES_EXECUTABLE}
+		--generate-source --target ${target} "${xml}" DEPENDS "${xml}"
+		WORKING_DIRECTORY "${_xml_path}" COMMENT "Compiling resources")
+
+	# This refuses to accept drive changes, but it also needn't succeed
+	execute_process (COMMAND ${GLIB_COMPILE_RESOURCES_EXECUTABLE}
+		--generate-dependencies "${xml}"
+		WORKING_DIRECTORY "${_xml_path}" OUTPUT_VARIABLE _deps)
+	string (REPLACE "\n" ";" _deps "${_deps}")
+	foreach (_dep ${_deps})
+		set_property (SOURCE "${target}"
+			APPEND PROPERTY OBJECT_DEPENDS "${_xml_path}/${_dep}")
+	endforeach ()
+
+	configure_file ("${xml}" glib-compile-resources.stamp COPYONLY)
+endfunction ()
+
+glib_compile_resources (${PROJECT_SOURCE_DIR}/share/logdiag.gresource.xml
+	${PROJECT_BINARY_DIR}/gresource.c)
+
 # Generate a configure file
 add_definitions (-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_36)
 add_definitions (-DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_36)
@@ -349,7 +392,7 @@ else ()
 endif ()
 
 install (DIRECTORY docs/user-guide DESTINATION share/doc/${PROJECT_NAME})
-install (DIRECTORY share/gui share/library DESTINATION share/${PROJECT_NAME})
+install (DIRECTORY share/library DESTINATION share/${PROJECT_NAME})
 install (FILES ${GSETTINGS_SCHEMAS} DESTINATION share/glib-2.0/schemas)
 install (CODE " # DESTDIR is not in use on Windows (WIN32 is only native here!)
 	if (WIN32 OR \"\$ENV{DESTDIR}\" STREQUAL \"\")

share/logdiag.gresource.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+	<gresource prefix="/logdiag">
+		<file>logdiag.ui</file>
+		<file alias="LICENSE">../LICENSE</file>
+	</gresource>
+</gresources>

src/ld-window-main.c

@@ -274,8 +274,8 @@ ld_window_main_init (LdWindowMain *self)
 		priv->action_group, 0);
 
 	error = NULL;
-	gtk_ui_manager_add_ui_from_file
-		(priv->ui_manager, PROJECT_SHARE_DIR "gui/window-main.ui", &error);
+	gtk_ui_manager_add_ui_from_resource
+		(priv->ui_manager, "/logdiag/logdiag.ui", &error);
 	if (error)
 	{
 		g_message ("building UI failed: %s", error->message);
@@ -1153,6 +1153,10 @@ static void
 on_action_about (GtkAction *action, LdWindowMain *self)
 {
 	GtkWidget *about_dialog;
+	GBytes *license;
+
+	license = g_resources_lookup_data ("/logdiag/LICENSE",
+		G_RESOURCE_LOOKUP_FLAGS_NONE, NULL);
 
 	about_dialog = g_object_new (GTK_TYPE_ABOUT_DIALOG,
 		"program-name", PROJECT_NAME,
@@ -1160,9 +1164,11 @@ on_action_about (GtkAction *action, LdWindowMain *self)
 		"version", PROJECT_VERSION,
 		"translator-credits", _("translator-credits"),
 		"copyright", "Copyright 2010 - 2021 Přemysl Eric Janouch",
+		"license", g_bytes_get_data (license, NULL),
 		"website", PROJECT_URL,
 		NULL);
 
+	g_bytes_unref (license);
 	g_signal_connect (about_dialog, "activate-link",
 		G_CALLBACK (on_action_about_activate_link), self);