[gtksourceview/wip/chergert/snippets: 89/119] stylescheme: port to GTK 4 CSS API

[Christian Hergert <chergert src gnome org>]

commit 1e911e3cab5bf4dda46a4f99824854cdf034dfc8
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 15 14:44:17 2020 -0800

    stylescheme: port to GTK 4 CSS API
    
     - Adjust gtk_css_provider_load_from_data()
     - Remove state flags usage

 gtksourceview/gtksourcestylescheme.c | 22 +++-------------------
 1 file changed, 3 insertions(+), 19 deletions(-)
---
diff --git a/gtksourceview/gtksourcestylescheme.c b/gtksourceview/gtksourcestylescheme.c
index 668585e6..fcc03dd7 100644
--- a/gtksourceview/gtksourcestylescheme.c
+++ b/gtksourceview/gtksourcestylescheme.c
@@ -740,7 +740,6 @@ get_cursors_css_style (GtkSourceStyleScheme *scheme,
                gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
 
                gtk_style_context_get (context,
-                                      gtk_style_context_get_state (context),
                                       "background-color", &background_color,
                                       NULL);
 
@@ -790,7 +789,7 @@ get_css_provider_cursors (GtkSourceStyleScheme *scheme,
 
        provider = gtk_css_provider_new ();
 
-       gtk_css_provider_load_from_data (provider, css, -1, &error);
+       gtk_css_provider_load_from_data (provider, css, -1);
        g_free (css);
 
        if (error != NULL)
@@ -826,11 +825,6 @@ _gtk_source_style_scheme_apply (GtkSourceStyleScheme *scheme,
                                        GTK_STYLE_PROVIDER (scheme->css_provider),
                                        GTK_SOURCE_STYLE_PROVIDER_PRIORITY);
 
-       G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
-       /* See https://bugzilla.gnome.org/show_bug.cgi?id=708583 */
-       gtk_style_context_invalidate (context);
-       G_GNUC_END_IGNORE_DEPRECATIONS;
-
        /* The CssProvider for the cursors needs that the first provider is
         * applied, to get the background color.
         */
@@ -845,10 +839,6 @@ _gtk_source_style_scheme_apply (GtkSourceStyleScheme *scheme,
                gtk_style_context_add_provider (context,
                                                GTK_STYLE_PROVIDER (scheme->css_provider_cursors),
                                                GTK_SOURCE_STYLE_PROVIDER_PRIORITY);
-
-               G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
-               gtk_style_context_invalidate (context);
-               G_GNUC_END_IGNORE_DEPRECATIONS;
        }
 }
 
@@ -879,11 +869,6 @@ _gtk_source_style_scheme_unapply (GtkSourceStyleScheme *scheme,
                gtk_style_context_remove_provider (context,
                                                   GTK_STYLE_PROVIDER (scheme->css_provider_cursors));
        }
-
-       G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
-       /* See https://bugzilla.gnome.org/show_bug.cgi?id=708583 */
-       gtk_style_context_invalidate (context);
-       G_GNUC_END_IGNORE_DEPRECATIONS;
 }
 
 /* --- PARSER ---------------------------------------------------------------- */
@@ -1001,9 +986,8 @@ generate_css_style (GtkSourceStyleScheme *scheme)
                GError *error = NULL;
 
                gtk_css_provider_load_from_data (scheme->css_provider,
-                                                final_style->str,
-                                                final_style->len,
-                                                &error);
+                                                final_style->str,
+                                                final_style->len);
 
                if (error != NULL)
                {