[gnome-subtitles] When the application is run with a subtitle file as first arg, validate that arg appropriately and c

[Pedro Daniel da Rocha Melo e Castro <pcastro src gnome org>]

commit 104d49f5d19f2bc05e874bff90b606e97bda1b9b
Author: Pedro Castro <pedro gnomesubtitles org>
Date:   Sun Jun 16 22:19:42 2013 +0100

    When the application is run with a subtitle file as first arg, validate that arg appropriately and 
convert it to absolute path if necessary (fixes #702413).

 src/GnomeSubtitles/Ui/MainUi.cs |   33 ++++++++++++++++++++++++++++-----
 1 files changed, 28 insertions(+), 5 deletions(-)
---
diff --git a/src/GnomeSubtitles/Ui/MainUi.cs b/src/GnomeSubtitles/Ui/MainUi.cs
index b288dfc..c96067d 100644
--- a/src/GnomeSubtitles/Ui/MainUi.cs
+++ b/src/GnomeSubtitles/Ui/MainUi.cs
@@ -98,12 +98,11 @@ public class MainUi {
     /// <summary>Starts the GUI</summary>
     /// <remarks>A file is opened if it was specified as argument. If it wasn't, a blank start is 
performed.</summary>
     public void Start () {
-       string[] args = Base.ExecutionContext.Args;
-       if (args.Length > 0) {
-               string subtitleFile = args[0];
-               Uri videoUri = Base.Config.PrefsVideoAutoChooseFile ? 
VideoFiles.FindMatchingVideo(subtitleFile) : null;
+               string subtitleFilePath = GetSubtitleFileArg(Base.ExecutionContext.Args);
+               if (subtitleFilePath != null) {
+                       Uri videoUri = Base.Config.PrefsVideoAutoChooseFile ? 
VideoFiles.FindMatchingVideo(subtitleFilePath) : null;
                        int codePage = GetFileOpenCodePageFromConfig();
-                       Open(subtitleFile, codePage, videoUri);
+                       Open(subtitleFilePath, codePage, videoUri);
                }
     }
 
@@ -456,6 +455,30 @@ public class MainUi {
                }
        }
 
+       private string GetSubtitleFileArg (string[] args) {
+               if (args.Length == 0) {
+                       return null;
+               }
+
+               string file = args[0];
+               if (file == null) {
+                       return null;
+               }
+
+               if (!Path.IsPathRooted(file)) {
+                       try {
+                               file = Path.GetFullPath(file);
+                       }
+                       catch (Exception e) {
+                               System.Console.Error.WriteLine("Unable to read subtitle file path from 
argument 0");
+                               System.Console.Error.WriteLine(e);
+                               return null;
+                       }
+               }
+
+               return file;
+       }
+
 
        /* Event members */