[evolution/wip/webkit2] Return empty image for contact-photo when no photo found

[Milan Crha <mcrha src gnome org>]

commit 1447745150ec93106f1c331eb191f14aff8472ef
Author: Milan Crha <mcrha redhat com>
Date:   Tue Mar 29 18:57:53 2016 +0200

    Return empty image for contact-photo when no photo found
    
    That will not show "broken image" icon in the view.

 mail/e-mail-request.c |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)
---
diff --git a/mail/e-mail-request.c b/mail/e-mail-request.c
index a75710d..399bbef 100644
--- a/mail/e-mail-request.c
+++ b/mail/e-mail-request.c
@@ -284,7 +284,25 @@ mail_request_process_contact_photo_sync (EContentRequest *request,
                }
        }
 
-       return success;
+       if (!success) {
+               GdkPixbuf *pixbuf;
+               gchar *buffer;
+               gsize length;
+
+               g_clear_error (error);
+
+               /* Construct empty image stream, to not show "broken image" icon when no contact photo is 
found */
+               pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
+               gdk_pixbuf_fill (pixbuf, 0x00000000); /* transparent black */
+               gdk_pixbuf_save_to_buffer (pixbuf, &buffer, &length, "png", NULL, NULL);
+               g_object_unref (pixbuf);
+
+               *out_stream = g_memory_input_stream_new_from_data (buffer, length, g_free);
+               *out_stream_length = length;
+               *out_mime_type = g_strdup ("image/png");
+       }
+
+       return TRUE;
 }
 
 typedef struct _MailIdleData