[f-spot] Create an ImageLoader factory.

[Ruben Vermeersch <rubenv src gnome org>]

commit d82e3981f677fa442a9da4d36df79783aba8c0da
Author: Ruben Vermeersch <ruben savanne be>
Date:   Wed Jul 8 15:14:23 2009 +0100

    Create an ImageLoader factory.

 src/Loaders/ImageLoader.cs |   73 ++++++++++++++++++++++++++++++++++++++++++++
 src/Makefile.am            |    1 +
 src/PhotoImageView.cs      |    2 +-
 3 files changed, 75 insertions(+), 1 deletions(-)
---
diff --git a/src/Loaders/ImageLoader.cs b/src/Loaders/ImageLoader.cs
new file mode 100644
index 0000000..762e66c
--- /dev/null
+++ b/src/Loaders/ImageLoader.cs
@@ -0,0 +1,73 @@
+//
+// Fspot.Loaders.ImageLoader.cs
+//
+// Copyright (c) 2009 Novell, Inc.
+//
+// Author(s)
+//	Stephane Delcroix  <sdelcroix novell com>
+//	Ruben Vermeersch  <ruben savanne be>
+//
+// This is free software. See COPYING for details
+//
+
+using FSpot.Utils;
+using System;
+using System.Collections.Generic;
+using Gdk;
+
+namespace FSpot.Loaders {
+	public static class ImageLoader {
+		static Dictionary<string, System.Type> name_table;
+
+		static ImageLoader ()
+		{
+			name_table = new Dictionary<string, System.Type> ();
+			name_table [".svg"] = typeof (GdkImageLoader);
+			name_table [".gif"] = typeof (GdkImageLoader);
+			name_table [".bmp"] = typeof (GdkImageLoader);
+			name_table [".jpeg"] = typeof (GdkImageLoader);
+			name_table [".jpg"] = typeof (GdkImageLoader);
+			name_table [".png"] = typeof (GdkImageLoader);
+			name_table [".cr2"] = typeof (GdkImageLoader);
+			name_table [".nef"] = typeof (GdkImageLoader);
+			name_table [".pef"] = typeof (GdkImageLoader);
+			name_table [".raw"] = typeof (GdkImageLoader);
+			name_table [".kdc"] = typeof (GdkImageLoader);
+			name_table [".arw"] = typeof (GdkImageLoader);
+			name_table [".tiff"] = typeof (GdkImageLoader);
+			name_table [".tif"] = typeof (GdkImageLoader);
+			name_table [".orf"] =  typeof (GdkImageLoader);
+			name_table [".srf"] = typeof (GdkImageLoader);
+			name_table [".dng"] = typeof (GdkImageLoader);
+			name_table [".crw"] = typeof (GdkImageLoader);
+			name_table [".ppm"] = typeof (GdkImageLoader);
+			name_table [".mrw"] = typeof (GdkImageLoader);
+			name_table [".raf"] = typeof (GdkImageLoader);
+			name_table [".x3f"] = typeof (GdkImageLoader);
+
+			//as xcf pixbufloader is not part of gdk-pixbuf, check if it's there,
+			//and enable it if needed.
+			foreach (Gdk.PixbufFormat format in Gdk.Pixbuf.Formats)
+				if (format.Name == "xcf") {
+					if (format.IsDisabled)
+						format.SetDisabled (false);
+					name_table [".xcf"] = typeof (GdkImageLoader);
+				}
+		}
+
+		public static IImageLoader Create (Uri uri)
+		{
+			string path = uri.AbsolutePath;
+			string extension = System.IO.Path.GetExtension (path).ToLower ();
+			System.Type t;
+			IImageLoader loader;
+
+			if (!name_table.TryGetValue (extension, out t))
+				throw new Exception ("Loader requested for unknown file type: "+extension);
+
+			loader = (IImageLoader) System.Activator.CreateInstance (t);
+
+			return loader;
+		}
+	}
+}
diff --git a/src/Makefile.am b/src/Makefile.am
index fa72e3b..95bcab5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -176,6 +176,7 @@ F_SPOT_CSDISTFILES =				\
 	$(srcdir)/Histogram.cs			\
 	$(srcdir)/Loaders/AreaPreparedEventArgs.cs		\
 	$(srcdir)/Loaders/AreaUpdatedEventArgs.cs		\
+	$(srcdir)/Loaders/ImageLoader.cs		\
 	$(srcdir)/Loaders/IImageLoader.cs		\
 	$(srcdir)/Loaders/GdkImageLoader.cs		\
 	$(srcdir)/ImageLoaderThread.cs		\
diff --git a/src/PhotoImageView.cs b/src/PhotoImageView.cs
index 688e9ae..a2bd364 100644
--- a/src/PhotoImageView.cs
+++ b/src/PhotoImageView.cs
@@ -203,7 +203,7 @@ namespace FSpot.Widgets {
 			if (loader != null)
 				loader.Dispose ();
 
-			loader = new GdkImageLoader ();
+			loader = ImageLoader.Create (uri);
 			loader.AreaPrepared += HandlePixbufPrepared;
 			loader.AreaUpdated += HandlePixbufAreaUpdated;
 			loader.Completed += HandleDone;