Added track index to TrackDescriptor

to indicate a track's import order.

ptulsconv/docparser/doc_entity.py

@@ -124,6 +124,7 @@ class HeaderDescriptor:
 
 
 class TrackDescriptor:
+    index: int
     name: str
     comments: str
     user_delay_samples: int
@@ -132,6 +133,7 @@ class TrackDescriptor:
     clips: List["TrackClipDescriptor"]
 
     def __init__(self, **kwargs):
+        self.index = kwargs['index']
         self.name = kwargs['name']
         self.comments = kwargs['comments']
         self.user_delay_samples = kwargs['user_delay_samples']

ptulsconv/docparser/pt_doc_parser.py

@@ -166,8 +166,8 @@ class DocParserVisitor(NodeVisitor):
                                          count_instances=child[10]),
                         visited_children[2]))
 
-    @staticmethod
-    def visit_track_block(_, visited_children):
+    # @staticmethod
+    def visit_track_block(self, _, visited_children):
         track_header, track_clip_list = visited_children
         clips = []
         for clip in track_clip_list:
@@ -179,7 +179,11 @@ class DocParserVisitor(NodeVisitor):
             for plugin in plugin_opt[1]:
                 plugins.append(plugin[1])
         
+        this_index = self.track_index
+        self.track_index += 1
+
         return TrackDescriptor(
+            index=this_index,
             name=track_header[2],
             comments=track_header[6],
             user_delay_samples=track_header[10],
@@ -192,8 +196,8 @@ class DocParserVisitor(NodeVisitor):
     def visit_frame_rate(node, _):
         return node.text
 
-    @staticmethod
-    def visit_track_listing(_, visited_children):
+    def visit_track_listing(self, _, visited_children):
+        self.track_index = 0
         return visited_children[1]
 
     @staticmethod