Merge pull request #120 from pbogut/feature/deoplete-source

Add deoplete source

rplugin/python3/deoplete/sources/deoplete_elm.py

@@ -0,0 +1,91 @@
+# =============================================================================
+# FILE: deoplete_elm.py
+# AUTHOR: Pawel Bogut
+# =============================================================================
+
+from .base import Base
+from os import path
+import re
+import subprocess
+import json
+
+
+class Source(Base):
+
+    def __init__(self, vim):
+        Base.__init__(self, vim)
+
+        self.name = 'elm'
+        self.mark = '[elm]'
+        self.filetypes = ['elm']
+        self.rank = 1000
+        self.input_pattern = r'[^\s\'"]*'
+        self.current = vim.current
+        self.vim = vim
+
+    def on_init(self, context):
+        self.oracle_cmd = 'elm-oracle'
+
+    def get_complete_position(self, context):
+        m = re.search(r'[^\s\'"]*$', context['input'])
+        if m:
+            return m.start()
+
+    def get_complete_query(self, context):
+        m = re.search(r'[^\s\'"]*$', context['input'])
+        if m:
+            return m.group()
+        return None
+
+    def gather_candidates(self, context):
+        file_path = self.current.buffer.name
+        current_path = self.get_project_root(file_path)
+        query = self.get_complete_query(context)
+        cmd = 'cd {} && {} {} "{}"'.format(current_path, self.oracle_cmd,
+                                           file_path, query)
+        if not query or query == '':
+            return []
+
+        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
+        output = proc.stdout.read()
+
+        jsonData = str(output.decode('utf-8'))
+
+        if not jsonData or jsonData == '':
+            return []
+
+        result = json.loads(jsonData)
+
+        if not result:
+            return []
+
+        candidates = []
+
+        for item in result:
+            word = self.get_word(item, query)
+            candidate = {'word': word,
+                         'abbr': word,
+                         'kind': item['signature'],
+                         'info': item['comment'],
+                         'dup': 0}
+            candidates.append(candidate)
+
+        return candidates
+
+    def get_word(self, item, query):
+        if item['name'].find(query) == 0:
+            return item['name']
+        else:
+            return item['fullName']
+
+    def get_project_root(self, file_path):
+        current_path = path.dirname(file_path)
+        while current_path != '/' and not path.exists(
+            path.join(current_path, 'elm-package.json')
+        ):
+            current_path = path.dirname(current_path)
+
+        if current_path == '/':
+            current_path = path.dirname(file_path)
+
+        return current_path