[banshee] Support Amazon MP3 music previews/samples

[Aaron Bockover <abock src gnome org>]

commit c7c18facbd38811c1cb8423786db730f89bc00f1
Author: Aaron Bockover <abockover novell com>
Date:   Sat Jul 10 02:05:33 2010 -0400

    Support Amazon MP3 music previews/samples
    
    Add mimetype propagation on the download callbacks in Ossifer so we know
    what kind of content we are handling.
    
    Support audio/x-mpegurl playback directly in the Banshee Player Engine.
    
    Disable the default WebKit context menu, since it can invoke actions we
    don't really support.

 .../Banshee.WebBrowser/OssiferWebView.cs           |   23 ++++++-----
 .../libossifer/ossifer-web-view.c                  |   20 ++++++++-
 .../Banshee.AmazonMp3.Store/StoreView.cs           |   41 ++++++++++++++-----
 3 files changed, 60 insertions(+), 24 deletions(-)
---
diff --git a/src/Core/Banshee.WebBrowser/Banshee.WebBrowser/OssiferWebView.cs b/src/Core/Banshee.WebBrowser/Banshee.WebBrowser/OssiferWebView.cs
index b47b08f..5c35df9 100644
--- a/src/Core/Banshee.WebBrowser/Banshee.WebBrowser/OssiferWebView.cs
+++ b/src/Core/Banshee.WebBrowser/Banshee.WebBrowser/OssiferWebView.cs
@@ -32,9 +32,9 @@ namespace Banshee.WebBrowser
     public class OssiferWebView : Gtk.Widget
     {
         private delegate OssiferNavigationResponse MimeTypePolicyDecisionRequestedCallback (IntPtr ossifer, IntPtr mimetype);
-        private delegate IntPtr DownloadRequestedCallback (IntPtr ossifer, IntPtr uri, IntPtr suggested_filename);
+        private delegate IntPtr DownloadRequestedCallback (IntPtr ossifer, IntPtr mimetype, IntPtr uri, IntPtr suggested_filename);
         private delegate void DocumentLoadFinishedCallback (IntPtr ossifer, IntPtr uri);
-        private delegate void DownloadStatusChangedCallback (IntPtr ossifer, OssiferDownloadStatus status, IntPtr destnation_uri);
+        private delegate void DownloadStatusChangedCallback (IntPtr ossifer, OssiferDownloadStatus status, IntPtr mimetype, IntPtr destnation_uri);
 
         [StructLayout (LayoutKind.Sequential)]
         private struct Callbacks
@@ -71,15 +71,15 @@ namespace Banshee.WebBrowser
             Initialize ();
             CreateNativeObject (new string[0], new GLib.Value[0]);
 
-            ossifer_web_view_set_callbacks (Handle, callbacks = new Callbacks () {
+            callbacks = new Callbacks () {
                 MimeTypePolicyDecisionRequested =
                     new MimeTypePolicyDecisionRequestedCallback (HandleMimeTypePolicyDecisionRequested),
                 DownloadRequested = new DownloadRequestedCallback (HandleDownloadRequested),
                 DocumentLoadFinished = new DocumentLoadFinishedCallback (HandleDocumentLoadFinished),
                 DownloadStatusChanged = new DownloadStatusChangedCallback (HandleDownloadStatusChanged)
-            });
+            };
 
-            GC.KeepAlive (callbacks);
+            ossifer_web_view_set_callbacks (Handle, callbacks);
         }
 
 #region Callback Implementations
@@ -94,9 +94,10 @@ namespace Banshee.WebBrowser
             return OssiferNavigationResponse.Unhandled;
         }
 
-        private IntPtr HandleDownloadRequested (IntPtr ossifer, IntPtr uri, IntPtr suggested_filename)
+        private IntPtr HandleDownloadRequested (IntPtr ossifer, IntPtr mimetype, IntPtr uri, IntPtr suggested_filename)
         {
             var destination_uri = OnDownloadRequested (
+                GLib.Marshaller.Utf8PtrToString (mimetype),
                 GLib.Marshaller.Utf8PtrToString (uri),
                 GLib.Marshaller.Utf8PtrToString (suggested_filename));
             return destination_uri == null
@@ -104,7 +105,7 @@ namespace Banshee.WebBrowser
                 : GLib.Marshaller.StringToPtrGStrdup (destination_uri);
         }
 
-        protected virtual string OnDownloadRequested (string uri, string suggestedFilename)
+        protected virtual string OnDownloadRequested (string mimetype, string uri, string suggestedFilename)
         {
             return null;
         }
@@ -122,12 +123,14 @@ namespace Banshee.WebBrowser
             }
         }
 
-        private void HandleDownloadStatusChanged (IntPtr ossifer, OssiferDownloadStatus status, IntPtr destinationUri)
+        private void HandleDownloadStatusChanged (IntPtr ossifer, OssiferDownloadStatus status, IntPtr mimetype, IntPtr destinationUri)
         {
-            OnDownloadStatusChanged (status, GLib.Marshaller.Utf8PtrToString (destinationUri));
+            OnDownloadStatusChanged (status,
+                GLib.Marshaller.Utf8PtrToString (mimetype),
+                GLib.Marshaller.Utf8PtrToString (destinationUri));
         }
 
-        protected virtual void OnDownloadStatusChanged (OssiferDownloadStatus status, string destinationUri)
+        protected virtual void OnDownloadStatusChanged (OssiferDownloadStatus status, string mimetype, string destinationUri)
         {
         }
 
diff --git a/src/Core/Banshee.WebBrowser/libossifer/ossifer-web-view.c b/src/Core/Banshee.WebBrowser/libossifer/ossifer-web-view.c
index a9181b4..72237ca 100644
--- a/src/Core/Banshee.WebBrowser/libossifer/ossifer-web-view.c
+++ b/src/Core/Banshee.WebBrowser/libossifer/ossifer-web-view.c
@@ -37,13 +37,13 @@ typedef WebKitNavigationResponse (* OssiferWebViewMimeTypePolicyDecisionRequeste
     (OssiferWebView *ossifer, const gchar *mimetype);
 
 typedef gchar * (* OssiferWebViewDownloadRequestedCallback)
-    (OssiferWebView *ossifer, const gchar *uri, const gchar *suggested_filename);
+    (OssiferWebView *ossifer, const gchar *mimetype, const gchar *uri, const gchar *suggested_filename);
 
 typedef void (* OssiferWebViewDocumentLoadFinishedCallback)
     (OssiferWebView *ossifer, const gchar *uri);
 
 typedef void (* OssiferWebViewDownloadStatusChanged)
-    (OssiferWebView *ossifer, WebKitDownloadStatus status, const gchar *uri);
+    (OssiferWebView *ossifer, WebKitDownloadStatus status, const gchar *mimetype, const gchar *uri);
 
 typedef struct {
     OssiferWebViewMimeTypePolicyDecisionRequestedCallback mime_type_policy_decision_requested;
@@ -60,6 +60,15 @@ struct OssiferWebViewPrivate {
 // OssiferWebView Internal Implementation
 // ---------------------------------------------------------------------------
 
+static const gchar *
+ossifer_web_view_download_get_mimetype (WebKitDownload *download)
+{
+    return soup_message_headers_get_content_type (
+        webkit_network_response_get_message (
+            webkit_download_get_network_response (download)
+        )->response_headers, NULL);
+}
+
 static WebKitWebView *
 ossifer_web_view_create_web_view (WebKitWebView *web_view, WebKitWebFrame *web_frame)
 {
@@ -103,6 +112,7 @@ ossifer_web_view_download_notify_status (GObject* object, GParamSpec* pspec, gpo
     if (ossifer->priv->callbacks.download_status_changed != NULL) {
         ossifer->priv->callbacks.download_status_changed (ossifer,
             webkit_download_get_status (download),
+            ossifer_web_view_download_get_mimetype (download),
             webkit_download_get_destination_uri (download));
     }
 }
@@ -116,6 +126,7 @@ ossifer_web_view_download_requested (WebKitWebView *web_view, WebKitDownload *do
     if (ossifer->priv->callbacks.download_requested == NULL ||
         (destination_uri = ossifer->priv->callbacks.download_requested (
             ossifer,
+            ossifer_web_view_download_get_mimetype (download),
             webkit_download_get_uri (download),
             webkit_download_get_suggested_filename (download))) == NULL) {
         return FALSE;
@@ -172,7 +183,10 @@ ossifer_web_view_init (OssiferWebView *ossifer)
     ossifer->priv = G_TYPE_INSTANCE_GET_PRIVATE (ossifer, OSSIFER_TYPE_WEB_VIEW, OssiferWebViewPrivate);
 
     g_object_get (ossifer, "settings", &settings, NULL);
-    g_object_set (settings, "enable-plugins", FALSE, NULL);
+    g_object_set (settings,
+        "enable-plugins", FALSE,
+        "enable-default-context-menu", FALSE,
+        NULL);
 
     g_signal_connect (ossifer, "mime-type-policy-decision-requested",
         G_CALLBACK (ossifer_web_view_mime_type_policy_decision_requested), NULL);
diff --git a/src/Extensions/Banshee.AmazonMp3.Store/Banshee.AmazonMp3.Store/StoreView.cs b/src/Extensions/Banshee.AmazonMp3.Store/Banshee.AmazonMp3.Store/StoreView.cs
index eeb7a2b..7863bb2 100644
--- a/src/Extensions/Banshee.AmazonMp3.Store/Banshee.AmazonMp3.Store/StoreView.cs
+++ b/src/Extensions/Banshee.AmazonMp3.Store/Banshee.AmazonMp3.Store/StoreView.cs
@@ -55,25 +55,44 @@ namespace Banshee.AmazonMp3.Store
             // download audio/x-amzxml - everything else is ignored.
             switch (mimetype) {
                 case "text/html": return OssiferNavigationResponse.Accept;
+                case "audio/x-mpegurl":
                 case "audio/x-amzxml": return OssiferNavigationResponse.Download;
-                default: return OssiferNavigationResponse.Ignore;
+                default:
+                    Log.Debug ("OssiferWebView: ignoring mime type", mimetype);
+                    return OssiferNavigationResponse.Ignore;
             }
         }
 
-        protected override string OnDownloadRequested (string uri, string suggestedFilename)
+        protected override string OnDownloadRequested (string mimetype, string uri, string suggestedFilename)
         {
-            var dest_uri_base = "file://" + Paths.Combine (Paths.TempDir, suggestedFilename);
-            var dest_uri = new SafeUri (dest_uri_base);
-            for (int i = 1; File.Exists (dest_uri);
-                dest_uri = new SafeUri (String.Format ("{0} ({1})", dest_uri_base, ++i)));
-            return dest_uri.AbsoluteUri;
+            switch (mimetype) {
+                case "audio/x-amzurl":
+                    var dest_uri_base = "file://" + Paths.Combine (Paths.TempDir, suggestedFilename);
+                    var dest_uri = new SafeUri (dest_uri_base);
+                    for (int i = 1; File.Exists (dest_uri);
+                        dest_uri = new SafeUri (String.Format ("{0} ({1})", dest_uri_base, ++i)));
+                    return dest_uri.AbsoluteUri;
+                case "audio/x-mpegurl":
+                    Banshee.Streaming.RadioTrackInfo.OpenPlay (uri);
+                    return null;
+            }
+
+            return null;
         }
 
-        protected override void OnDownloadStatusChanged (OssiferDownloadStatus status, string destinationUri)
+        protected override void OnDownloadStatusChanged (OssiferDownloadStatus status, string mimetype, string destinationUri)
         {
-            if (status == OssiferDownloadStatus.Finished) {
-                Banshee.ServiceStack.ServiceManager.Get<AmazonMp3DownloaderService> ()
-                    .DownloadAmz (new SafeUri (destinationUri).LocalPath);
+            // FIXME: handle the error case
+            if (status != OssiferDownloadStatus.Finished) {
+                return;
+            }
+
+            switch (mimetype) {
+                case "audio/x-amzurl":
+                    Log.Debug ("OssiferWebView: downloaded purchase list", destinationUri);
+                    Banshee.ServiceStack.ServiceManager.Get<AmazonMp3DownloaderService> ()
+                        .DownloadAmz (new SafeUri (destinationUri).LocalPath);
+                    break;
             }
         }
     }