348 lines
11 KiB
Python
348 lines
11 KiB
Python
# vim:fileencoding=utf-8:noet
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from __future__ import (unicode_literals, division, absolute_import, print_function)
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import sys
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import json
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import logging
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from itertools import count
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try:
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import vim
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except ImportError:
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vim = object()
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from powerline.bindings.vim import vim_get_func, vim_getvar, get_vim_encoding, python_to_vim
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from powerline import Powerline, FailedUnicode, finish_common_config
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from powerline.lib.dict import mergedicts
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from powerline.lib.unicode import u
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def _override_from(config, override_varname, key=None):
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try:
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overrides = vim_getvar(override_varname)
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except KeyError:
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return config
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if key is not None:
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try:
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overrides = overrides[key]
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except KeyError:
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return config
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mergedicts(config, overrides)
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return config
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class VimVarHandler(logging.Handler, object):
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'''Vim-specific handler which emits messages to Vim global variables
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:param str varname:
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Variable where
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'''
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def __init__(self, varname):
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super(VimVarHandler, self).__init__()
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utf_varname = u(varname)
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self.vim_varname = utf_varname.encode('ascii')
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vim.command('unlet! g:' + utf_varname)
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vim.command('let g:' + utf_varname + ' = []')
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def emit(self, record):
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message = u(record.message)
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if record.exc_text:
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message += '\n' + u(record.exc_text)
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vim.eval(b'add(g:' + self.vim_varname + b', ' + python_to_vim(message) + b')')
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class VimPowerline(Powerline):
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def init(self, pyeval='PowerlinePyeval', **kwargs):
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super(VimPowerline, self).init('vim', **kwargs)
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self.last_window_id = 1
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self.pyeval = pyeval
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self.construct_window_statusline = self.create_window_statusline_constructor()
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if all((hasattr(vim.current.window, attr) for attr in ('options', 'vars', 'number'))):
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self.win_idx = self.new_win_idx
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else:
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self.win_idx = self.old_win_idx
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self._vim_getwinvar = vim_get_func('getwinvar', 'bytes')
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self._vim_setwinvar = vim_get_func('setwinvar')
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if sys.version_info < (3,):
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def create_window_statusline_constructor(self):
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window_statusline = b'%!' + str(self.pyeval) + b'(\'powerline.statusline({0})\')'
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return window_statusline.format
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else:
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def create_window_statusline_constructor(self):
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startstr = b'%!' + self.pyeval.encode('ascii') + b'(\'powerline.statusline('
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endstr = b')\')'
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return lambda idx: (
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startstr + str(idx).encode('ascii') + endstr
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)
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create_window_statusline_constructor.__doc__ = (
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'''Create function which returns &l:stl value being given window index
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Created function must return :py:class:`bytes` instance because this is
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what ``window.options['statusline']`` returns (``window`` is
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:py:class:`vim.Window` instance).
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:return:
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Function with type ``int → bytes``.
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'''
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)
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default_log_stream = sys.stdout
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def add_local_theme(self, key, config):
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'''Add local themes at runtime (during vim session).
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:param str key:
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Matcher name (in format ``{matcher_module}.{module_attribute}`` or
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``{module_attribute}`` if ``{matcher_module}`` is
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``powerline.matchers.vim``). Function pointed by
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``{module_attribute}`` should be hashable and accept a dictionary
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with information about current buffer and return boolean value
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indicating whether current window matched conditions. See also
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:ref:`local_themes key description <config-ext-local_themes>`.
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:param dict config:
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:ref:`Theme <config-themes>` dictionary.
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:return:
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``True`` if theme was added successfully and ``False`` if theme with
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the same matcher already exists.
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'''
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self.update_renderer()
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matcher = self.get_matcher(key)
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theme_config = {}
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for cfg_path in self.theme_levels:
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try:
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lvl_config = self.load_config(cfg_path, 'theme')
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except IOError:
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pass
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else:
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mergedicts(theme_config, lvl_config)
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mergedicts(theme_config, config)
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try:
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self.renderer.add_local_theme(matcher, {'config': theme_config})
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except KeyError:
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return False
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else:
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# Hack for local themes support: when reloading modules it is not
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# guaranteed that .add_local_theme will be called once again, so
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# this function arguments will be saved here for calling from
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# .do_setup().
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self.setup_kwargs.setdefault('_local_themes', []).append((key, config))
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return True
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get_encoding = staticmethod(get_vim_encoding)
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def load_main_config(self):
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main_config = _override_from(super(VimPowerline, self).load_main_config(), 'powerline_config_overrides')
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try:
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use_var_handler = bool(int(vim_getvar('powerline_use_var_handler')))
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except KeyError:
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use_var_handler = False
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if use_var_handler:
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main_config.setdefault('common', {})
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main_config['common'] = finish_common_config(self.get_encoding(), main_config['common'])
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main_config['common']['log_file'].append(['powerline.vim.VimVarHandler', [['powerline_log_messages']]])
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return main_config
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def load_theme_config(self, name):
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return _override_from(
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super(VimPowerline, self).load_theme_config(name),
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'powerline_theme_overrides',
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name
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)
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def get_local_themes(self, local_themes):
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if not local_themes:
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return {}
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return dict((
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(matcher, {'config': self.load_theme_config(val)})
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for matcher, key, val in (
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(
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(None if k == '__tabline__' else self.get_matcher(k)),
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k,
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v
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)
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for k, v in local_themes.items()
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) if (
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matcher or
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key == '__tabline__'
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)
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))
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def get_matcher(self, match_name):
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match_module, separator, match_function = match_name.rpartition('.')
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if not separator:
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match_module = 'powerline.matchers.{0}'.format(self.ext)
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match_function = match_name
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return self.get_module_attr(match_module, match_function, prefix='matcher_generator')
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def get_config_paths(self):
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try:
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return vim_getvar('powerline_config_paths')
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except KeyError:
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return super(VimPowerline, self).get_config_paths()
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def do_setup(self, pyeval=None, pycmd=None, can_replace_pyeval=True, _local_themes=()):
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import __main__
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if not pyeval:
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pyeval = 'pyeval' if sys.version_info < (3,) else 'py3eval'
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can_replace_pyeval = True
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if not pycmd:
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pycmd = get_default_pycmd()
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set_pycmd(pycmd)
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# pyeval() and vim.bindeval were both introduced in one patch
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if (not hasattr(vim, 'bindeval') and can_replace_pyeval) or pyeval == 'PowerlinePyeval':
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vim.command(('''
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function! PowerlinePyeval(e)
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{pycmd} powerline.do_pyeval()
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endfunction
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''').format(pycmd=pycmd))
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pyeval = 'PowerlinePyeval'
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self.pyeval = pyeval
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self.construct_window_statusline = self.create_window_statusline_constructor()
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self.update_renderer()
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__main__.powerline = self
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try:
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if (
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bool(int(vim.eval('has(\'gui_running\') && argc() == 0')))
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and not vim.current.buffer.name
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and len(vim.windows) == 1
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):
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# Hack to show startup screen. Problems in GUI:
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# - Defining local value of &statusline option while computing
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# global value purges startup screen.
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# - Defining highlight group while computing statusline purges
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# startup screen.
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# This hack removes the “while computing statusline” part: both
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# things are defined, but they are defined right now.
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#
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# The above condition disables this hack if no GUI is running,
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# Vim did not open any files and there is only one window.
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# Without GUI everything works, in other cases startup screen is
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# not shown.
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self.new_window()
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except UnicodeDecodeError:
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# vim.current.buffer.name may raise UnicodeDecodeError when using
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# Python-3*. Fortunately, this means that current buffer is not
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# empty buffer, so the above condition should be False.
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pass
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# Cannot have this in one line due to weird newline handling (in :execute
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# context newline is considered part of the command in just the same cases
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# when bar is considered part of the command (unless defining function
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# inside :execute)). vim.command is :execute equivalent regarding this case.
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vim.command('augroup Powerline')
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vim.command(' autocmd! ColorScheme * :{pycmd} powerline.reset_highlight()'.format(pycmd=pycmd))
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vim.command(' autocmd! VimLeavePre * :{pycmd} powerline.shutdown()'.format(pycmd=pycmd))
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vim.command('augroup END')
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# Hack for local themes support after reloading.
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for args in _local_themes:
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self.add_local_theme(*args)
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def reset_highlight(self):
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try:
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self.renderer.reset_highlight()
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except AttributeError:
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# Renderer object appears only after first `.render()` call. Thus if
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# ColorScheme event happens before statusline is drawn for the first
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# time AttributeError will be thrown for the self.renderer. It is
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# fine to ignore it: no renderer == no colors to reset == no need to
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# do anything.
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pass
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def new_win_idx(self, window_id):
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r = None
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for window in vim.windows:
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try:
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curwindow_id = window.vars['powerline_window_id']
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if r is not None and curwindow_id == window_id:
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raise KeyError
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except KeyError:
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curwindow_id = self.last_window_id
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self.last_window_id += 1
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window.vars['powerline_window_id'] = curwindow_id
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statusline = self.construct_window_statusline(curwindow_id)
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if window.options['statusline'] != statusline:
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window.options['statusline'] = statusline
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if curwindow_id == window_id if window_id else window is vim.current.window:
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r = (window, curwindow_id, window.number)
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return r
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def old_win_idx(self, window_id):
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r = None
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for winnr, window in zip(count(1), vim.windows):
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curwindow_id = self._vim_getwinvar(winnr, 'powerline_window_id')
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if curwindow_id and not (r is not None and curwindow_id == window_id):
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curwindow_id = int(curwindow_id)
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else:
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curwindow_id = self.last_window_id
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self.last_window_id += 1
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self._vim_setwinvar(winnr, 'powerline_window_id', curwindow_id)
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statusline = self.construct_window_statusline(curwindow_id)
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if self._vim_getwinvar(winnr, '&statusline') != statusline:
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self._vim_setwinvar(winnr, '&statusline', statusline)
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if curwindow_id == window_id if window_id else window is vim.current.window:
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r = (window, curwindow_id, winnr)
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return r
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def statusline(self, window_id):
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window, window_id, winnr = self.win_idx(window_id) or (None, None, None)
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if not window:
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return FailedUnicode('No window {0}'.format(window_id))
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return self.render(window, window_id, winnr)
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def tabline(self):
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return self.render(*self.win_idx(None), is_tabline=True)
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def new_window(self):
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return self.render(*self.win_idx(None))
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@staticmethod
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def do_pyeval():
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'''Evaluate python string passed to PowerlinePyeval
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Is here to reduce the number of requirements to __main__ globals to just
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one powerline object (previously it required as well vim and json).
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'''
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import __main__
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vim.command('return ' + json.dumps(eval(vim.eval('a:e'), __main__.__dict__)))
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def setup_components(self, components):
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if components is None:
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components = ('statusline', 'tabline')
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if 'statusline' in components:
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# Is immediately changed after new_window function is run. Good for
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# global value.
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vim.command('set statusline=%!{pyeval}(\'powerline.new_window()\')'.format(
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pyeval=self.pyeval))
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if 'tabline' in components:
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vim.command('set tabline=%!{pyeval}(\'powerline.tabline()\')'.format(
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pyeval=self.pyeval))
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pycmd = None
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def set_pycmd(new_pycmd):
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global pycmd
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pycmd = new_pycmd
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def get_default_pycmd():
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return 'python' if sys.version_info < (3,) else 'python3'
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def setup(*args, **kwargs):
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powerline = VimPowerline()
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return powerline.setup(*args, **kwargs)
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