[gtk+] textlayout: respect preedit color attribute

[Daiki Ueno <dueno src gnome org>]

commit 7a9553cfb5d465df79161f61f7c01d872e90b983
Author: Daiki Ueno <ueno unixuser org>
Date:   Tue Jan 29 14:49:22 2013 +0900

    textlayout: respect preedit color attribute
    
    gtk_text_renderer_prepare_run now checks appearance.rgba, rather than
    appearance.{fg_color,bg_color}.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=692766

 gtk/gtktextlayout.c |   20 ++++++++++++++------
 1 files changed, 14 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtktextlayout.c b/gtk/gtktextlayout.c
index 825f722..73be6b4 100644
--- a/gtk/gtktextlayout.c
+++ b/gtk/gtktextlayout.c
@@ -1846,12 +1846,13 @@ allocate_child_widgets (GtkTextLayout      *text_layout,
 }
 
 static void
-convert_color (GdkColor       *result,
+convert_color (GdkRGBA        *result,
 	       PangoAttrColor *attr)
 {
-  result->red = attr->color.red;
-  result->blue = attr->color.blue;
-  result->green = attr->color.green;
+  result->red = attr->color.red / 65535.;
+  result->blue = attr->color.blue / 65535.;
+  result->green = attr->color.green / 65535.;
+  result->alpha = 1;
 }
 
 /* This function is used to convert the preedit string attributes, which are
@@ -1891,14 +1892,21 @@ add_preedit_attrs (GtkTextLayout     *layout,
       while (tmp_list)
 	{
 	  PangoAttribute *attr = tmp_list->data;
+	  GdkRGBA rgba;
 	  
 	  switch (attr->klass->type)
 	    {
 	    case PANGO_ATTR_FOREGROUND:
-	      convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
+	      convert_color (&rgba, (PangoAttrColor *)attr);
+	      if (appearance.rgba[1])
+		gdk_rgba_free (appearance.rgba[1]);
+	      appearance.rgba[1] = gdk_rgba_copy (&rgba);
 	      break;
 	    case PANGO_ATTR_BACKGROUND:
-	      convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
+	      convert_color (&rgba, (PangoAttrColor *)attr);
+	      if (appearance.rgba[0])
+		gdk_rgba_free (appearance.rgba[0]);
+	      appearance.rgba[0] = gdk_rgba_copy (&rgba);
 	      appearance.draw_bg = TRUE;
 	      break;
 	    case PANGO_ATTR_UNDERLINE: