[metacity/wip/gtk-theme: 16/52] frames: Use title style to set up title layout

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 08a50706b57c9f44892c691ff81be5582e188c47
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Sep 25 06:44:45 2014 +0200

    frames: Use title style to set up title layout
    
    Sounds obvious, doesn't it?
    
    After this change when titlebar-uses-system-font is set, the "system
    font" used will not be a generic one, but match what GTK+ uses in
    client-side decorations.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741917
    
    NOTE: Updated for metacity in way it does not break existing themes.

 src/ui/frames.c |   23 +++++++++++++++--------
 src/ui/theme.c  |   26 ++++++++++++++++++++++++++
 src/ui/theme.h  |    8 ++++++++
 src/ui/ui.c     |   41 +++++++++++++++++++++++++++++------------
 4 files changed, 78 insertions(+), 20 deletions(-)
---
diff --git a/src/ui/frames.c b/src/ui/frames.c
index 9ea60a9..e38b583 100644
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -525,22 +525,29 @@ meta_frames_ensure_layout (MetaFrames  *frames,
     {
       gpointer key, value;
       PangoFontDescription *font_desc;
-      double scale;
       int size;
 
-      scale = meta_theme_get_title_scale (meta_theme_get_current (),
-                                          type,
-                                          flags);
-
       frame->layout = gtk_widget_create_pango_layout (widget, frame->title);
 
       pango_layout_set_ellipsize (frame->layout, PANGO_ELLIPSIZE_END);
       pango_layout_set_auto_dir (frame->layout, FALSE);
-
       pango_layout_set_single_paragraph_mode (frame->layout, TRUE);
 
-      font_desc = meta_gtk_widget_get_font_desc (widget, scale,
-                                                 meta_prefs_get_titlebar_font ());
+      if (g_getenv ("USE_METACITY_THEME") != NULL)
+        {
+          double scale;
+
+          scale = meta_theme_get_title_scale (meta_theme_get_current (),
+                                              type, flags);
+
+          font_desc = meta_gtk_widget_get_font_desc (widget, scale,
+                                                     meta_prefs_get_titlebar_font ());
+        }
+      else
+        {
+          font_desc = meta_style_info_create_font_desc (frame->style_info);
+          meta_frame_style_apply_scale (style, font_desc);
+        }
 
       size = pango_font_description_get_size (font_desc);
 
diff --git a/src/ui/theme.c b/src/ui/theme.c
index 9baee78..d8415ee 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -54,6 +54,7 @@
 #include "frames.h" /* for META_TYPE_FRAMES */
 #include "theme.h"
 #include "theme-parser.h"
+#include "prefs.h" /* for meta_prefs_get_titlebar_font */
 #include "util.h"
 #include "gradient.h"
 #include <gtk/gtk.h>
@@ -4519,6 +4520,15 @@ get_button (MetaFrameStyle *style,
   return op_list;
 }
 
+void
+meta_frame_style_apply_scale (const MetaFrameStyle *style,
+                              PangoFontDescription *font_desc)
+{
+  int size = pango_font_description_get_size (font_desc);
+  pango_font_description_set_size (font_desc,
+                                   MAX (size * style->layout->title_scale, 1));
+}
+
 gboolean
 meta_frame_style_validate (MetaFrameStyle    *style,
                            guint              current_theme_version,
@@ -5601,6 +5611,22 @@ meta_style_info_unref (MetaStyleInfo *style_info)
     }
 }
 
+PangoFontDescription*
+meta_style_info_create_font_desc (MetaStyleInfo *style_info)
+{
+  PangoFontDescription *font_desc;
+  const PangoFontDescription *override = meta_prefs_get_titlebar_font ();
+
+  gtk_style_context_get (style_info->styles[META_STYLE_ELEMENT_TITLE],
+                         GTK_STATE_FLAG_NORMAL,
+                         "font", &font_desc, NULL);
+
+  if (override)
+    pango_font_description_merge (font_desc, override, TRUE);
+
+  return font_desc;
+}
+
 void
 meta_theme_draw_frame (MetaTheme              *theme,
                        MetaStyleInfo          *style_info,
diff --git a/src/ui/theme.h b/src/ui/theme.h
index 57e8d10..df85576 100644
--- a/src/ui/theme.h
+++ b/src/ui/theme.h
@@ -1027,6 +1027,9 @@ MetaFrameStyle* meta_frame_style_new   (MetaFrameStyle *parent);
 void            meta_frame_style_ref   (MetaFrameStyle *style);
 void            meta_frame_style_unref (MetaFrameStyle *style);
 
+void            meta_frame_style_apply_scale (const MetaFrameStyle *style,
+                                              PangoFontDescription *font_desc);
+
 MetaShadowProperties* meta_frame_style_get_shadow_properties (MetaFrameStyle *style);
 MetaInvisibleGrabAreaProperties* meta_frame_style_get_invisible_grab_area_properties (MetaFrameStyle *style);
 
@@ -1067,6 +1070,11 @@ MetaStyleInfo* meta_theme_create_style_info (GdkScreen     *screen,
 MetaStyleInfo* meta_style_info_ref          (MetaStyleInfo *style);
 void           meta_style_info_unref        (MetaStyleInfo *style_info);
 
+PangoFontDescription* meta_style_info_create_font_desc (MetaStyleInfo *style_info);
+
+void meta_style_info_set_flags              (MetaStyleInfo  *style_info,
+                                             MetaFrameFlags  flags);
+
 void meta_theme_draw_frame (MetaTheme              *theme,
                             MetaStyleInfo          *style_info,
                             cairo_t                *cr,
diff --git a/src/ui/ui.c b/src/ui/ui.c
index 88fc883..ca06058 100644
--- a/src/ui/ui.c
+++ b/src/ui/ui.c
@@ -675,7 +675,6 @@ meta_ui_theme_get_frame_borders (MetaUI           *ui,
   int text_height;
   PangoContext *context;
   const PangoFontDescription *font_desc;
-  GtkStyleContext *style = NULL;
   PangoFontDescription *free_font_desc = NULL;
 
   if (meta_ui_have_a_theme ())
@@ -687,16 +686,37 @@ meta_ui_theme_get_frame_borders (MetaUI           *ui,
         {
           GdkDisplay *display = gdk_x11_lookup_xdisplay (ui->xdisplay);
           GdkScreen *screen = gdk_display_get_screen (display, XScreenNumberOfScreen (ui->xscreen));
-          GtkWidgetPath *widget_path;
 
-          style = gtk_style_context_new ();
-          gtk_style_context_set_screen (style, screen);
-          widget_path = gtk_widget_path_new ();
-          gtk_widget_path_append_type (widget_path, GTK_TYPE_WINDOW);
-          gtk_style_context_set_path (style, widget_path);
-          gtk_widget_path_free (widget_path);
+          if (g_getenv ("USE_METACITY_THEME") != NULL)
+            {
+              GtkStyleContext *style = NULL;
+              GtkWidgetPath *widget_path;
+
+              style = gtk_style_context_new ();
+              gtk_style_context_set_screen (style, screen);
+              widget_path = gtk_widget_path_new ();
+              gtk_widget_path_append_type (widget_path, GTK_TYPE_WINDOW);
+              gtk_style_context_set_path (style, widget_path);
+              gtk_widget_path_free (widget_path);
+
+              gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL,
+                                     "font", &free_font_desc,
+                                     NULL);
+
+              if (style != NULL)
+                g_object_unref (style);
+            }
+          else
+            {
+              MetaStyleInfo *style_info = NULL;
+
+              style_info = meta_theme_create_style_info (screen, NULL);
+              free_font_desc = meta_style_info_create_font_desc (style_info);
+
+              if (style_info != NULL)
+                meta_style_info_unref (style_info);
+            }
 
-          gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL, "font", &free_font_desc, NULL);
           font_desc = (const PangoFontDescription *) free_font_desc;
         }
 
@@ -713,9 +733,6 @@ meta_ui_theme_get_frame_borders (MetaUI           *ui,
     {
       meta_frame_borders_clear (borders);
     }
-
-  if (style != NULL)
-    g_object_unref (style);
 }
 
 void