[mutter] screen-cast-session: Add API to get stream from object path

[Jonas Ådahl <jadahl src gnome org>]

commit f3203f0330767652d398efb289a4f6dfbb41ddda
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Jan 29 14:46:42 2018 +0800

    screen-cast-session: Add API to get stream from object path
    
    Will be needed by the remote desktop session to translate stream local
    input coordinates.

 src/backends/meta-screen-cast-session.c | 18 ++++++++++++++++++
 src/backends/meta-screen-cast-session.h |  5 +++++
 2 files changed, 23 insertions(+)
---
diff --git a/src/backends/meta-screen-cast-session.c b/src/backends/meta-screen-cast-session.c
index 674e1214e..b95ce514d 100644
--- a/src/backends/meta-screen-cast-session.c
+++ b/src/backends/meta-screen-cast-session.c
@@ -97,6 +97,24 @@ meta_screen_cast_session_close (MetaScreenCastSession *session)
   g_object_unref (session);
 }
 
+MetaScreenCastStream *
+meta_screen_cast_session_get_stream (MetaScreenCastSession *session,
+                                     const char            *path)
+{
+  GList *l;
+
+  for (l = session->streams; l; l = l->next)
+    {
+      MetaScreenCastStream *stream = l->data;
+
+      if (g_strcmp0 (meta_screen_cast_stream_get_object_path (stream),
+                     path) == 0)
+        return stream;
+    }
+
+  return NULL;
+}
+
 char *
 meta_screen_cast_session_get_object_path (MetaScreenCastSession *session)
 {
diff --git a/src/backends/meta-screen-cast-session.h b/src/backends/meta-screen-cast-session.h
index 20bbf84e7..c877912cf 100644
--- a/src/backends/meta-screen-cast-session.h
+++ b/src/backends/meta-screen-cast-session.h
@@ -25,6 +25,8 @@
 
 #include "backends/meta-screen-cast.h"
 
+#include "backends/meta-screen-cast-stream.h"
+
 typedef enum _MetaScreenCastSessionType
 {
   META_SCREEN_CAST_SESSION_TYPE_NORMAL,
@@ -48,4 +50,7 @@ gboolean meta_screen_cast_session_start (MetaScreenCastSession  *session,
 
 void meta_screen_cast_session_close (MetaScreenCastSession *session);
 
+MetaScreenCastStream * meta_screen_cast_session_get_stream (MetaScreenCastSession *session,
+                                                            const char            *path);
+
 #endif /* META_SCREEN_CAST_SESSION_H */