Add tabbuflister and buflister listers

powerline/config_files/themes/vim/tabline.json

@@ -4,12 +4,13 @@
 		"left": [
 			{
 				"type": "segment_list",
-				"name": "tablister",
+				"name": "tabbuflister",
 				"segments": [
 					{
 						"name": "tabnr",
 						"after": " ",
 						"draw_soft_divider": false,
+						"exclude_modes": ["tab", "buf"],
 						"priority": 5
 					},
 					{

powerline/segments/vim.py

@@ -548,3 +548,50 @@ def tablister(pl, segment_info):
 		)
 		for tabpage in list_tabpages()
 	]
+
+
+def buffer_updated_segment_info(segment_info, buffer):
+	segment_info = segment_info.copy()
+	segment_info.update(
+		window=None,
+		winnr=None,
+		window_id=None,
+		buffer=buffer,
+		bufnr=buffer.number,
+	)
+	return segment_info
+
+
+@requires_segment_info
+def bufferlister(pl, segment_info):
+	'''List all buffers in segment_info format
+
+	Specifically generates a list of segment info dictionaries with ``buffer`` 
+	and ``bufnr`` keys set to buffer-specific ones, ``window``, ``winnr`` and 
+	``window_id`` keys unset.
+
+	Sets segment ``mode`` to either ``buf`` (for current buffer) or ``nc`` 
+	(for all other buffers).
+	'''
+	cur_buffer = vim.current.buffer
+	cur_bufnr = cur_buffer.number
+
+	def add_multiplier(buffer, dct):
+		dct['priority_multiplier'] = 1 + (0.001 * abs(buffer.number - cur_bufnr))
+		return dct
+
+	return [
+		(
+			buffer_updated_segment_info(segment_info, buffer),
+			add_multiplier(buffer, {'mode': ('tab' if buffer == cur_buffer else 'nc')})
+		)
+		for buffer in vim.buffers
+	]
+
+
+@requires_segment_info
+def tabbuflister(*args, **kwargs):
+	if len(list_tabpages()) == 1:
+		return bufferlister(*args, **kwargs)
+	else:
+		return tablister(*args, **kwargs)