Add the has_name() fn to EventRef, MessageRef and StructureRef

They are handy and they match the C api

gstreamer/src/event.rs

@@ -216,6 +216,11 @@ impl EventRef {
         unsafe { from_glib((*self.as_ptr()).type_) }
     }
 
+    #[doc(alias = "gst_event_has_name")]
+    pub fn has_name(&self, name: &str) -> bool {
+        self.structure().map_or(false, |s| s.has_name(name))
+    }
+
     pub fn view(&self) -> EventView<&EventRef> {
         let type_ = unsafe { (*self.as_ptr()).type_ };
 

gstreamer/src/message.rs

@@ -68,6 +68,11 @@ impl MessageRef {
         }
     }
 
+    #[doc(alias = "gst_message_has_name")]
+    pub fn has_name(&self, name: &str) -> bool {
+        self.structure().map_or(false, |s| s.has_name(name))
+    }
+
     pub fn view(&self) -> MessageView {
         let type_ = unsafe { (*self.as_ptr()).type_ };
 

gstreamer/src/structure.rs

@@ -495,6 +495,11 @@ impl StructureRef {
         unsafe { ffi::gst_structure_set_name(&mut self.0, name.to_glib_none().0) }
     }
 
+    #[doc(alias = "gst_structure_has_name")]
+    pub fn has_name(&self, name: &str) -> bool {
+        self.name() == name
+    }
+
     #[doc(alias = "gst_structure_has_field")]
     pub fn has_field(&self, field: &str) -> bool {
         unsafe {