[gtksourceview] gtksourcestyle: unset styles if they don't exist

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 9ba6e86db7aa1d985580d7edf4f86528cb8aff10
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Thu Jun 23 21:30:00 2011 +0200

    gtksourcestyle: unset styles if they don't exist

 gtksourceview/gtksourcestyle.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/gtksourceview/gtksourcestyle.c b/gtksourceview/gtksourcestyle.c
index f76e02b..234863f 100644
--- a/gtksourceview/gtksourcestyle.c
+++ b/gtksourceview/gtksourcestyle.c
@@ -425,21 +425,38 @@ _gtk_source_style_apply (const GtkSourceStyle *style,
 
 		if (style->mask & GTK_SOURCE_STYLE_USE_BACKGROUND)
 			g_object_set (tag, "background", style->background, NULL);
+		else
+			g_object_set (tag, "background-set", FALSE, NULL);
 
 		if (style->mask & GTK_SOURCE_STYLE_USE_FOREGROUND)
 			g_object_set (tag, "foreground", style->foreground, NULL);
+		else
+			g_object_set (tag, "foreground-set", FALSE, NULL);
 
 		if (style->mask & GTK_SOURCE_STYLE_USE_LINE_BACKGROUND)
 			g_object_set (tag, "paragraph-background", style->line_background, NULL);
+		else
+			g_object_set (tag, "paragraph-background-set", FALSE, NULL);
 
 		if (style->mask & GTK_SOURCE_STYLE_USE_ITALIC)
 			g_object_set (tag, "style", style->italic ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL, NULL);
+		else
+			g_object_set (tag, "style-set", FALSE, NULL);
+
 		if (style->mask & GTK_SOURCE_STYLE_USE_BOLD)
 			g_object_set (tag, "weight", style->bold ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL, NULL);
+		else
+			g_object_set (tag, "weight-set", FALSE, NULL);
+
 		if (style->mask & GTK_SOURCE_STYLE_USE_UNDERLINE)
 			g_object_set (tag, "underline", style->underline ? PANGO_UNDERLINE_SINGLE : PANGO_UNDERLINE_NONE, NULL);
+		else
+			g_object_set (tag, "underline-set", FALSE, NULL);
+
 		if (style->mask & GTK_SOURCE_STYLE_USE_STRIKETHROUGH)
 			g_object_set (tag, "strikethrough", style->strikethrough != 0, NULL);
+		else
+			g_object_set (tag, "strikethrough-set", FALSE, NULL);
 
 		g_object_thaw_notify (G_OBJECT (tag));
 	}