[evolution/gnome-3-22] Bug 772233 - White flash on mail area of email reader

[Tomas Popela <tpopela src gnome org>]

commit 81babbc22004c2297714142c6c4c1d1d11d91ccd
Author: Tomas Popela <tpopela redhat com>
Date:   Thu Oct 6 16:45:00 2016 +0200

    Bug 772233 - White flash on mail area of email reader
    
    Set the WebKitWebView background color with
    webkit_web_view_set_background_color() as this color will be used before
    the actual content will be rendered (and before we will have a chance to
    inject the right background color through CSS) and it will avoid white
    flash when using a black theme.

 e-util/e-web-view.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/e-util/e-web-view.c b/e-util/e-web-view.c
index 5294320..42ccad8 100644
--- a/e-util/e-web-view.c
+++ b/e-util/e-web-view.c
@@ -662,11 +662,20 @@ style_updated_cb (EWebView *web_view)
 
        if (gtk_style_context_lookup_color (style_context, "theme_base_color", &color))
                color_value = g_strdup_printf ("#%06x", e_rgba_to_value (&color));
-       else
+       else {
                color_value = g_strdup (E_UTILS_DEFAULT_THEME_BASE_COLOR);
+               if (!gdk_rgba_parse (&color, color_value)) {
+                       color.red = 1.0;
+                       color.green = 1.0;
+                       color.blue = 1.0;
+                       color.alpha = 1.0;
+               }
+       }
 
        style = g_strconcat ("background-color: ", color_value, ";", NULL);
 
+       webkit_web_view_set_background_color (WEBKIT_WEB_VIEW (web_view), &color);
+
        e_web_view_add_css_rule_into_style_sheet (
                web_view,
                "-e-web-view-style-sheet",