Add plugins for Rust support.

sources_non_forked/vim-racer/rplugin/python3/deoplete/sources/racer.py

@@ -0,0 +1,103 @@
+#=============================================================================
+# FILE: racer.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 re
+import os
+import subprocess
+from .base import Base
+
+class Source(Base):
+    def __init__(self, vim):
+        Base.__init__(self, vim)
+
+        self.name = 'racer'
+        self.mark = '[racer]'
+        self.filetypes = ['rust']
+        self.input_pattern = r'(\.|::)\w*'
+        self.__executable_racer = self.vim.funcs.executable(
+            self.vim.eval('g:racer_cmd'))
+        self.__racer = self.vim.eval('g:racer_cmd')
+        self.__encoding = self.vim.eval('&encoding')
+
+    def get_complete_position(self, context):
+        if not self.__executable_racer:
+            return -1
+
+        results = self.get_results('prefix', self.vim.funcs.col('.'))
+        if not results:
+            return -1
+        prefixline = results[0]
+        return int(prefixline[7:].split(',')[0])
+
+    def gather_candidates(self, context):
+        typeMap = {
+            'Struct': 's', 'Module': 'M', 'Function': 'f',
+            'Crate': 'C',  'Let': 'v',    'StructField': 'm',
+            'Impl': 'i',   'Enum': 'e',   'EnumVariant': 'E',
+            'Type': 't',   'FnArg': 'v',  'Trait': 'T'
+        }
+
+        candidates = []
+        insert_paren = int(self.vim.eval('g:racer_insert_paren'))
+        for line in [l[6:] for l
+                     in self.get_results('complete-with-snippet',
+                                         context['complete_position'] + 1)
+                     if l.startswith('MATCH')]:
+            completions = line.split(';', 6)
+            kind = typeMap[completions[5]]
+            completion = { 'kind': kind, 'word': completions[0], 'dup': 1 }
+            if kind == 'f': # function
+                completion['menu'] = completions[6].replace(
+                    'pub ', '').replace('fn ', '').rstrip('{')
+                if ' where ' in completion['menu'] or completion[
+                        'menu'].endswith(' where') :
+                    where = completion['menu'].rindex(' where')
+                    completion['menu'] = completion['menu'][: where]
+                if insert_paren:
+                    completion['abbr'] = completions[0]
+                    completion['word'] += '('
+            elif kind == 's' : # struct
+                completion['menu'] = completions[6].replace(
+                    'pub ', '').replace( 'struct ', '').rstrip('{')
+            candidates.append(completion)
+        return candidates
+
+    def get_results(self, command, col):
+        temp = self.vim.funcs.tempname()
+        with open(temp, 'w') as f:
+            for l in self.vim.current.buffer:
+                f.write(l + "\n")
+        try:
+            results = subprocess.check_output([
+                    self.__racer, command,
+                    str(self.vim.funcs.line('.')),
+                    str(col - 1),
+                    temp
+                ]).decode(self.__encoding).splitlines()
+        except subprocess.CalledProcessError:
+            return []
+        finally:
+            os.remove(temp)
+        return results