[gnome-software/wip/hughsie/editor: 15/16] trivial: Perform the @datadir@ substitution when parsing CSS

[Richard Hughes <rhughes src gnome org>]

commit 8e7e39e9105ca77d062d43333e006e2fdaf191c6
Author: Richard Hughes <richard hughsie com>
Date:   Thu Jul 18 12:44:39 2019 +0100

    trivial: Perform the @datadir@ substitution when parsing CSS
    
    Normally this will have been done using the plugin loader, but the editor wants
    to render the CSS directly without changing the GsApp metadata.

 src/gs-css.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/src/gs-css.c b/src/gs-css.c
index 740d2b77..b794bbd0 100644
--- a/src/gs-css.c
+++ b/src/gs-css.c
@@ -15,6 +15,7 @@
 #include "config.h"
 
 #include <gtk/gtk.h>
+#include <appstream-glib.h>
 
 #include "gs-css.h"
 
@@ -54,14 +55,19 @@ gboolean
 gs_css_parse (GsCss *self, const gchar *markup, GError **error)
 {
        g_auto(GStrv) parts = NULL;
+       g_autoptr(GString) markup_str = NULL;
 
        /* no data */
        if (markup == NULL || markup[0] == '\0')
                return TRUE;
 
        /* old style, no IDs */
-       if (!g_str_has_prefix (markup, "#")) {
-               g_hash_table_insert (self->ids, g_strdup ("tile"), g_strdup (markup));
+       markup_str = g_string_new (markup);
+       as_utils_string_replace (markup_str, "@datadir@", DATADIR);
+       if (!g_str_has_prefix (markup_str->str, "#")) {
+               g_hash_table_insert (self->ids,
+                                    g_strdup ("tile"),
+                                    g_string_free (g_steal_pointer (&markup_str), FALSE));
                return TRUE;
        }
 
@@ -70,7 +76,7 @@ gs_css_parse (GsCss *self, const gchar *markup, GError **error)
         *    #tile {border-radius: 0;}
         *    #name {color: white;}
         */
-       parts = g_strsplit (markup + 1, "\n#", -1);
+       parts = g_strsplit (markup_str->str + 1, "\n#", -1);
        for (guint i = 0; parts[i] != NULL; i++) {
                g_autoptr(GString) current_css = NULL;
                g_autoptr(GString) current_key = NULL;