Initial GResource migration

Embedding UI data files as GResource makes several things easier.
The compiled resources need to be linked directly with the binary
as they won't be available if linked with the embedded libeom.

Starting with eom.css and eom-ui.xml

inspired from:
https://gitlab.gnome.org/GNOME/eog/commit/94004b4

configure.ac

@@ -37,6 +37,7 @@ AC_PROG_LIBTOOL
 
 AC_PROG_CC
 AM_PROG_CC_C_O
+AC_PATH_PROG([GLIB_COMPILE_RESOURCES], [glib-compile-resources])
 AC_PATH_PROG([GLIB_GENMARSHAL], [glib-genmarshal])
 AC_PATH_PROG([GLIB_MKENUMS],[glib-mkenums])
 

data/Makefile.am

@@ -25,21 +25,17 @@ ui_DATA = \
 	eom-image-properties-dialog.ui \
 	eom-multiple-save-as-dialog.ui \
 	eom-preferences-dialog.ui \
-	eom-ui.xml \
 	eom-toolbar.xml
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = eom.pc
 
-themedir = $(pkgdatadir)
-theme_DATA = \
-        eom.css
-
 EXTRA_DIST = \
-        $(theme_DATA) \
-        $(ui_DATA) \
-        $(DESKTOP_IN_FILES) \
-        $(appdata_in_files)
+	$(ui_DATA) \
+	eom.css			\
+	eom-ui.xml		\
+	$(DESKTOP_IN_FILES) \
+	$(appdata_in_files)
 
 CLEANFILES = \
         $(appdata_DATA)

src/Makefile.am

@@ -157,7 +157,9 @@ libeom_la_LIBADD += \
 	$(X11_LIBS)
 endif
 
-eom_SOURCES = main.c
+eom_SOURCES = \
+	main.c \
+	eom-resources.c
 
 eom_CFLAGS = 							\
 	-I$(top_srcdir)/cut-n-paste/toolbar-editor		\
@@ -177,8 +179,13 @@ eom_LDADD = 				\
 BUILT_SOURCES = 			\
 	eom-enum-types.c		\
 	eom-enum-types.h		\
+	eom-resources.c			\
 	$(MARSHAL_OUTPUT)
 
+eom-resources.c: eom.gresource.xml $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(top_srcdir)/data --generate-dependencies eom.gresource.xml)
+	$(AM_V_GEN) $(GLIB_COMPILE_RESOURCES) "$<" --target=$@ \
+         --sourcedir=$(top_srcdir)/data --c-name _eom --generate-source
+
 eom-enum-types.h: eom-enum-types.h.template $(INST_H_FILES) $(GLIB_MKENUMS)
 	$(AM_V_GEN)(cd $(srcdir) && $(GLIB_MKENUMS) --template eom-enum-types.h.template $(INST_H_FILES)) > $@
 
@@ -192,6 +199,7 @@ eom-marshal.c: eom-marshal.list $(GLIB_GENMARSHAL)
 	$(AM_V_GEN)$(GLIB_GENMARSHAL) $< --body --header --prefix=eom_marshal > $@
 
 EXTRA_DIST = 				\
+	eom.gresource.xml		\
 	eom-enum-types.h.template	\
 	eom-enum-types.c.template	\
 	eom-marshal.list

src/eom-window.c

@@ -4380,9 +4380,9 @@ eom_window_construct_ui (EomWindow *window)
 
 	gtk_ui_manager_insert_action_group (priv->ui_mgr, priv->actions_collection, 0);
 
-	if (!gtk_ui_manager_add_ui_from_file (priv->ui_mgr,
-					      EOM_DATA_DIR"/eom-ui.xml",
-					      &error)) {
+	if (!gtk_ui_manager_add_ui_from_resource (priv->ui_mgr,
+	                                          "/org/mate/eom/ui/eom-ui.xml",
+	                                          &error)) {
 		g_warning ("building menus failed: %s", error->message);
 		g_error_free (error);
 	}

src/eom.gresource.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/org/mate/eom/ui">
+    <file>eom.css</file>
+    <file compressed="true" preprocess="xml-stripblanks">eom-ui.xml</file>
+  </gresource>
+</gresources>
+
+
+

src/main.c

@@ -96,6 +96,7 @@ main (int argc, char **argv)
 {
 	GError *error = NULL;
 	GOptionContext *ctx;
+	GFile *css_file;
 	GtkCssProvider *provider;
 
 	bindtextdomain (GETTEXT_PACKAGE, EOM_LOCALE_DIR);
@@ -140,10 +141,11 @@ main (int argc, char **argv)
 	eom_thumbnail_init ();
 
 	/* Load special style properties for EomThumbView's scrollbar */
+	css_file = g_file_new_for_uri ("resource:///org/mate/eom/ui/eom.css");
 	provider = gtk_css_provider_new ();
-	if (G_UNLIKELY (!gtk_css_provider_load_from_path(provider,
-							 EOM_CSS_FILE_PATH,
-							 &error)))
+	if (G_UNLIKELY (!gtk_css_provider_load_from_file(provider,
+	                                                 css_file,
+	                                                 &error)))
 	{
 		g_critical ("Could not load CSS data: %s", error->message);
 		g_clear_error (&error);