[metacity] libmetacity: do not reload CSS changing composited status

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 518e7f2c426b7c13ba1062b43c284d7c45a5fde8
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Mar 4 15:27:54 2017 +0200

    libmetacity: do not reload CSS changing composited status

 libmetacity/meta-style-info-private.h |   20 ++++++++++++--------
 libmetacity/meta-style-info.c         |   30 ++++++++++++++++++++++++++++++
 libmetacity/meta-theme.c              |   19 ++++++++++++++++++-
 3 files changed, 60 insertions(+), 9 deletions(-)
---
diff --git a/libmetacity/meta-style-info-private.h b/libmetacity/meta-style-info-private.h
index 9b76472..70d61fa 100644
--- a/libmetacity/meta-style-info-private.h
+++ b/libmetacity/meta-style-info-private.h
@@ -38,18 +38,22 @@ G_GNUC_INTERNAL
 G_DECLARE_FINAL_TYPE (MetaStyleInfo, meta_style_info, META, STYLE_INFO, GObject)
 
 G_GNUC_INTERNAL
-MetaStyleInfo   *meta_style_info_new       (const gchar      *gtk_theme_name,
-                                            const gchar      *gtk_theme_variant,
-                                            gboolean          composited,
-                                            gint              window_scale);
+MetaStyleInfo   *meta_style_info_new            (const gchar      *gtk_theme_name,
+                                                 const gchar      *gtk_theme_variant,
+                                                 gboolean          composited,
+                                                 gint              window_scale);
 
 G_GNUC_INTERNAL
-GtkStyleContext *meta_style_info_get_style (MetaStyleInfo    *style_info,
-                                            MetaStyleElement  element);
+GtkStyleContext *meta_style_info_get_style      (MetaStyleInfo    *style_info,
+                                                 MetaStyleElement  element);
 
 G_GNUC_INTERNAL
-void             meta_style_info_set_flags (MetaStyleInfo    *style_info,
-                                            MetaFrameFlags    flags);
+void             meta_style_info_set_composited (MetaStyleInfo    *style_info,
+                                                 gboolean          composited);
+
+G_GNUC_INTERNAL
+void             meta_style_info_set_flags      (MetaStyleInfo    *style_info,
+                                                 MetaFrameFlags    flags);
 
 G_END_DECLS
 
diff --git a/libmetacity/meta-style-info.c b/libmetacity/meta-style-info.c
index f155890..a6d9099 100644
--- a/libmetacity/meta-style-info.c
+++ b/libmetacity/meta-style-info.c
@@ -341,6 +341,36 @@ meta_style_info_get_style (MetaStyleInfo    *style_info,
 }
 
 void
+meta_style_info_set_composited (MetaStyleInfo *style_info,
+                                gboolean       composited)
+{
+  gint i;
+
+  if (style_info->composited == composited)
+    return;
+
+  style_info->composited = composited;
+
+  for (i = 0; i < META_STYLE_ELEMENT_LAST; i++)
+    {
+      GtkStyleContext *style;
+
+      style = style_info->styles[i];
+
+      if (composited)
+        {
+          remove_toplevel_class (style, "solid-csd");
+          add_toplevel_class (style, "csd");
+        }
+      else
+        {
+          remove_toplevel_class (style, "csd");
+          add_toplevel_class (style, "solid-csd");
+        }
+    }
+}
+
+void
 meta_style_info_set_flags (MetaStyleInfo  *style_info,
                            MetaFrameFlags  flags)
 {
diff --git a/libmetacity/meta-theme.c b/libmetacity/meta-theme.c
index 5a6fded..2428f3f 100644
--- a/libmetacity/meta-theme.c
+++ b/libmetacity/meta-theme.c
@@ -64,6 +64,20 @@ static GParamSpec *properties[LAST_PROP] = { NULL };
 
 G_DEFINE_TYPE (MetaTheme, meta_theme, G_TYPE_OBJECT)
 
+static void
+update_composited_func (gpointer key,
+                        gpointer value,
+                        gpointer user_data)
+{
+  MetaTheme *theme;
+  MetaStyleInfo *style_info;
+
+  theme = META_THEME (user_data);
+  style_info = META_STYLE_INFO (value);
+
+  meta_style_info_set_composited (style_info, theme->composited);
+}
+
 static MetaStyleInfo *
 get_style_info (MetaTheme   *theme,
                 const gchar *variant)
@@ -693,7 +707,10 @@ meta_theme_set_composited (MetaTheme *theme,
   theme->composited = composited;
 
   meta_theme_impl_set_composited (theme->impl, composited);
-  meta_theme_invalidate (theme);
+  g_hash_table_foreach (theme->variants, update_composited_func, theme);
+
+  g_hash_table_remove_all (theme->font_descs);
+  g_hash_table_remove_all (theme->title_heights);
 }
 
 void