[gnumeric] SheetObjects: get font from GSetting under ssconvert.

[Morten Welinder <mortenw src gnome org>]

commit d9ced8fc9fa74df1e65f6d980683cf8a15e3f13a
Author: Morten Welinder <terra gnome org>
Date:   Sat Jan 30 12:55:51 2016 -0500

    SheetObjects: get font from GSetting under ssconvert.
    
    *Another* GTK+ ABI change.

 ChangeLog                 |    3 +++
 NEWS                      |    1 +
 src/sheet-object-widget.c |   30 +++++++++++++++++-------------
 3 files changed, 21 insertions(+), 13 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index f6b2ccc..77b8f19 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2016-01-30  Morten Welinder  <terra gnome org>
 
+       * src/sheet-object-widget.c (get_font): Under ssconvert, don't try
+       GtkStyleContext.  Another ABI changes causes that to crash.
+
        * src/value.c (find_column_of_field): Insist that the database be
        a cell range, not an array.
 
diff --git a/NEWS b/NEWS
index b484c3e..cc13cde 100644
--- a/NEWS
+++ b/NEWS
@@ -25,6 +25,7 @@ Morten:
        * Improve BESSELJ and BESSELY.
        * Improve BETA accuracy.
        * Fix problem with database functions.  [#761305]
+       * Fix font problem for ssconvert to pdf.  [#761296]
 
 --------------------------------------------------------------------------
 Gnumeric 1.12.26
diff --git a/src/sheet-object-widget.c b/src/sheet-object-widget.c
index 8cf12a9..5f09ca6 100644
--- a/src/sheet-object-widget.c
+++ b/src/sheet-object-widget.c
@@ -589,24 +589,28 @@ sheet_widget_frame_user_config (SheetObject *so, SheetControl *sc)
 static PangoFontDescription *
 get_font (void)
 {
-       /* Note: Under gnumeric, we appear to get a proper font using */
-       /*       GtkStyleContext. Under ssconvert, some seem to get a */
-       /*       proper font using GtkStyleContext, some don't. Those */
-       /*       get one using the Gsettings. The 'sans 10' is just   */
-       /*       insurance */
-       PangoFontDescription *desc;
+       // Note: Under gnumeric, we get a proper font using GtkStyleContext.
+       // Under ssconvert, we try GSettings.
+       // The 'sans 10' is just insurance
 
-       GtkStyleContext *style = gtk_style_context_new ();
-       GtkWidgetPath *path = gtk_widget_path_new ();
+       PangoFontDescription *desc;
        PangoFontMask mask;
        int size = 0;
 
-       gtk_style_context_set_path (style, path);
-       gtk_widget_path_unref (path);
+       if (gdk_screen_get_default ()) {
+               // Without a default screen, the following will crash
+               // with newer gtk+.
+               GtkStyleContext *style = gtk_style_context_new ();
+               GtkWidgetPath *path = gtk_widget_path_new ();
 
-       gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL,
-                              GTK_STYLE_PROPERTY_FONT, &desc, NULL);
-       g_object_unref (style);
+               gtk_style_context_set_path (style, path);
+               gtk_widget_path_unref (path);
+
+               gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL,
+                                      GTK_STYLE_PROPERTY_FONT, &desc, NULL);
+               g_object_unref (style);
+       } else
+               desc = pango_font_description_new ();
 
        mask = pango_font_description_get_set_fields (desc);
        if ((mask & PANGO_FONT_MASK_SIZE) != 0)