[smuxi: 1/2] Frontend-STFL: Handle image message parts (closes #1035).

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit 37d8d28982e28ce0a9f3a62bcc48ffcf6c9084e2
Author: Ondřej Hošek <ondra hosek gmail com>
Date:   Mon Mar 16 00:16:58 2015 +0100

    Frontend-STFL: Handle image message parts (closes #1035).
    
    Whenever an ImageMessagePartModel is encountered, output the
    AlternativeText.

 src/Frontend-STFL/Views/ChatView.cs |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/Frontend-STFL/Views/ChatView.cs b/src/Frontend-STFL/Views/ChatView.cs
index 950aa76..1cca5e6 100644
--- a/src/Frontend-STFL/Views/ChatView.cs
+++ b/src/Frontend-STFL/Views/ChatView.cs
@@ -314,6 +314,11 @@ namespace Smuxi.Frontend.Stfl
                         line.Append(escapedText);
                     }
                     msgLength += txtPart.Text.Length;
+                } else if (msgPart is ImageMessagePartModel) {
+                    var imgPart = (ImageMessagePartModel)msgPart;
+                    string escapedAltText = StflApi.EscapeRichText(imgPart.AlternativeText);
+                    line.Append(escapedAltText);
+                    msgLength += escapedAltText.Length;
                 }
             }