[evolution] Bug 758945 - Disable inline display of TIFF images

[Milan Crha <mcrha src gnome org>]

commit f04d69ae41b8d7f8a6859d22a58b9f479c18b68d
Author: Milan Crha <mcrha redhat com>
Date:   Mon Sep 11 16:27:30 2017 +0200

    Bug 758945 - Disable inline display of TIFF images

 src/em-format/e-mail-formatter-image.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/src/em-format/e-mail-formatter-image.c b/src/em-format/e-mail-formatter-image.c
index 70ca898..9f837d8 100644
--- a/src/em-format/e-mail-formatter-image.c
+++ b/src/em-format/e-mail-formatter-image.c
@@ -67,6 +67,7 @@ emfe_image_format (EMailFormatterExtension *extension,
 {
        gchar *content;
        CamelMimePart *mime_part;
+       CamelContentType *content_type;
        CamelDataWrapper *dw;
        GBytes *bytes;
        GOutputStream *raw_content;
@@ -75,6 +76,15 @@ emfe_image_format (EMailFormatterExtension *extension,
                return FALSE;
 
        mime_part = e_mail_part_ref_mime_part (part);
+
+       content_type = camel_mime_part_get_content_type (mime_part);
+
+       /* Skip TIFF images, which cannot be shown inline */
+       if (content_type && (
+           camel_content_type_is (content_type, "image", "tiff") ||
+           camel_content_type_is (content_type, "image", "tif")))
+               return FALSE;
+
        dw = camel_medium_get_content (CAMEL_MEDIUM (mime_part));
        g_return_val_if_fail (dw, FALSE);