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# vim:fileencoding=utf-8:noet
from __future__ import (unicode_literals, division, absolute_import, print_function)
try:
import vim
except ImportError:
vim = object()
from powerline.bindings.vim import vim_command_exists, vim_get_autoload_func
from powerline.theme import requires_segment_info
currenttag = None
tag_cache = {}
@requires_segment_info
def current_tag(segment_info, pl, flags='s'):
'''Return tag that is near the cursor.
:param str flags:
Specifies additional properties of the displayed tag. Supported values:
* s - display complete signature
* f - display the full hierarchy of the tag
* p - display the raw prototype
More info in the `official documentation`_ (search for
“tagbar#currenttag”).
.. _`official documentation`: https://github.com/majutsushi/tagbar/blob/master/doc/tagbar.txt
'''
global currenttag
global tag_cache
window_id = segment_info['window_id']
if segment_info['mode'] == 'nc':
return tag_cache.get(window_id, (None,))[-1]
if not currenttag:
if vim_command_exists('Tagbar'):
currenttag = vim_get_autoload_func('tagbar#currenttag')
if not currenttag:
return None
else:
return None
prev_key, r = tag_cache.get(window_id, (None, None))
key = (int(vim.eval('b:changedtick')), segment_info['window'].cursor[0])
if prev_key and key == prev_key:
return r
r = currenttag('%s', '', flags)
tag_cache[window_id] = (key, r)
return r
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