[gtksourceview] styleschemechooserwidget: use block font

[Christian Hergert <chergert src gnome org>]

commit 7322628974721a0321630ba34def458c3b27663d
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 11 11:50:52 2021 -0700

    styleschemechooserwidget: use block font
    
    This removes the C-isms in this widget which could be offputting and
    confusing to users. Instead we use our BuilderBlocks font inherited from
    Builder and use the label to describe the scheme name.

 gtksourceview/gtksourcestyleschemechooserwidget.c | 83 +++++++++++++++++++++--
 1 file changed, 79 insertions(+), 4 deletions(-)
---
diff --git a/gtksourceview/gtksourcestyleschemechooserwidget.c 
b/gtksourceview/gtksourcestyleschemechooserwidget.c
index 5cc418cb..0f837898 100644
--- a/gtksourceview/gtksourcestyleschemechooserwidget.c
+++ b/gtksourceview/gtksourcestyleschemechooserwidget.c
@@ -20,6 +20,12 @@
 
 #include "config.h"
 
+#if ENABLE_FONT_CONFIG
+# include <fontconfig/fontconfig.h>
+# include <pango/pangocairo.h>
+# include <pango/pangofc-fontmap.h>
+#endif
+
 #include "gtksourcestyleschemechooserwidget.h"
 #include "gtksourcestyleschemechooser.h"
 #include "gtksourcestylescheme-private.h"
@@ -68,6 +74,50 @@ enum
        PROP_STYLE_SCHEME
 };
 
+#if ENABLE_FONT_CONFIG
+static FcConfig *map_font_config;
+static GtkCssProvider *css_provider;
+
+static void
+load_override_font (GtkWidget *widget)
+{
+       PangoFontDescription *font_desc;
+       PangoFontMap *font_map;
+
+       if (g_once_init_enter (&map_font_config))
+       {
+               const gchar *font_path = PACKAGE_DATADIR"/fonts/BuilderBlocks.ttf";
+               FcConfig *config = FcInitLoadConfigAndFonts ();
+
+               if (!g_file_test (font_path, G_FILE_TEST_IS_REGULAR))
+                       g_debug ("\"%s\" is missing or inaccessible", font_path);
+
+               FcConfigAppFontAddFile (config, (const FcChar8 *)font_path);
+
+               css_provider = gtk_css_provider_new ();
+               gtk_css_provider_load_from_data (css_provider, "textview, textview text { font-family: 
BuilderBlocks; font-size: 10pt; }", -1);
+
+               g_once_init_leave (&map_font_config, config);
+       }
+
+       font_map = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT);
+       pango_fc_font_map_set_config (PANGO_FC_FONT_MAP (font_map), map_font_config);
+       gtk_widget_set_font_map (widget, font_map);
+       font_desc = pango_font_description_from_string ("BuilderBlocks 8");
+
+       g_assert (map_font_config != NULL);
+       g_assert (font_map != NULL);
+       g_assert (font_desc != NULL);
+
+       gtk_style_context_add_provider (gtk_widget_get_style_context (widget),
+                                       GTK_STYLE_PROVIDER (css_provider),
+                                       GTK_STYLE_PROVIDER_PRIORITY_APPLICATION-1);
+
+       pango_font_description_free (font_desc);
+       g_object_unref (font_map);
+}
+#endif
+
 static void
 gtk_source_style_scheme_chooser_widget_dispose (GObject *object)
 {
@@ -138,14 +188,20 @@ static GtkWidget *
 make_row (GtkSourceStyleScheme *scheme,
           GtkSourceLanguage    *language)
 {
+       PangoAttrList *attrs;
        GtkWidget *row;
        GtkSourceBuffer *buffer;
        GtkWidget *view;
        GtkWidget *overlay;
        GtkWidget *label;
        gchar *text;
+       const char *name;
+       GdkRGBA fg;
+       gboolean has_fg;
 
        row = gtk_list_box_row_new ();
+       name = gtk_source_style_scheme_get_name (scheme);
+       has_fg = _gtk_source_style_scheme_get_text_color (scheme, &fg);
 
        g_object_set_data (G_OBJECT (row), "scheme", scheme);
 
@@ -163,28 +219,47 @@ make_row (GtkSourceStyleScheme *scheme,
 
        view = g_object_new (GTK_SOURCE_TYPE_VIEW,
                             "buffer", buffer,
+                            "focusable", FALSE,
                             "can-focus", FALSE,
                             "cursor-visible", FALSE,
                             "editable", FALSE,
                             "visible", TRUE,
                             "right-margin-position", 30,
                             "show-right-margin", TRUE,
-                            "margin-top", 2,
-                            "margin-bottom", 2,
-                            "margin-start", 2,
-                            "margin-end", 2,
+                            "top-margin", 6,
+                            "bottom-margin", 6,
+                            "left-margin", 6,
+                            "right-margin", 6,
+                            "height-request", 38,
                             NULL);
+       load_override_font (view);
        gtk_overlay_set_child (GTK_OVERLAY (overlay), view);
 
+       if (!has_fg)
+               gtk_style_context_get_color (gtk_widget_get_style_context (view), &fg);
+
+       attrs = pango_attr_list_new ();
+       pango_attr_list_insert (attrs, pango_attr_foreground_new (fg.red * 65535, fg.green * 65535, fg.blue * 
65535));
+       pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
+       pango_attr_list_insert (attrs, pango_attr_scale_new (0.9));
+
        label = g_object_new (GTK_TYPE_LABEL,
+                             "attributes", attrs,
+                             "focusable", FALSE,
                              "can-focus", FALSE,
                              "hexpand", TRUE,
                              "vexpand", TRUE,
+                             "yalign", 0.0f,
+                             "xalign", 1.0f,
+                             "label", name,
                              "selectable", FALSE,
+                             "margin-top", 3,
+                             "margin-end", 6,
                              NULL);
        gtk_overlay_add_overlay (GTK_OVERLAY (overlay), label);
 
        gtk_widget_show (row);
+       pango_attr_list_unref (attrs);
 
        return row;
 }