__init__.py

# ============================================================================
# FILE: __init__.py
# AUTHOR: Shougo Matsushita <Shougo.Matsu at gmail.com>
# License: MIT license  {{{
#     Permission is hereby granted, free of charge, to any person obtaining
#     a copy of this software and associated documentation files (the
#     "Software"), to deal in the Software without restriction, including
#     without limitation the rights to use, copy, modify, merge, publish,
#     distribute, sublicense, and/or sell copies of the Software, and to
#     permit persons to whom the Software is furnished to do so, subject to
#     the following conditions:
#
#     The above copyright notice and this permission notice shall be included
#     in all copies or substantial portions of the Software.
#
#     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
#     OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
#     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
#     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
#     CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
#     TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
#     SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# }}}
# ============================================================================

import neovim
import traceback

from deoplete.deoplete import Deoplete
from deoplete.util import error


@neovim.plugin
class DeopleteHandlers(object):

    def __init__(self, vim):
        self.vim = vim

    @neovim.command('DeopleteInitializePython', sync=True, nargs=0)
    def init_python(self):
        self.deoplete = Deoplete(self.vim)
        self.vim.vars['deoplete#_channel_id'] = self.vim.channel_id

    @neovim.rpc_export('completion_begin')
    def completion_begin(self, context):
        pos = self.vim.current.window.cursor
        try:
            complete_position, candidates = self.deoplete.gather_candidates(
                context)
        except Exception:
            for line in traceback.format_exc().splitlines():
                error(self.vim, line)
            error(self.vim,
                  'An error has occurred. Please execute :messages command.')
            candidates = []

        if not candidates or self.vim.funcs.mode() != 'i' \
                or pos != self.vim.current.window.cursor:
            self.vim.vars['deoplete#_context'] = {}
            return

        var_context = {}
        var_context['complete_position'] = complete_position
        var_context['changedtick'] = context['changedtick']
        var_context['candidates'] = candidates
        self.vim.vars['deoplete#_context'] = var_context

        # Set (and store) current &completeopt setting.  This cannot be done
        # (currently) from the deoplete_start_complete mapping's function.
        self.vim.command(
            'call deoplete#mappings#_set_completeopt()')
        # Note: cannot use vim.feedkeys()
        self.vim.command(
            'call feedkeys("\<Plug>(deoplete_start_complete)")')