1 files changed, 114 insertions, 0 deletions
diff --git a/rplugin/python3/deoplete/sources/beancount.py b/rplugin/python3/deoplete/sources/beancount.py
new file mode 100644
index 0000000..0194da3
--- /dev/null
+++ b/rplugin/python3/deoplete/sources/beancount.py
@@ -0,0 +1,114 @@
+import collections
+import re
+
+from deoplete.source.base import Base
+
+try:
+    from beancount.loader import load_file
+    from beancount.core import data
+    HAS_BEANCOUNT = True
+except ImportError:
+    HAS_BEANCOUNT = False
+
+DIRECTIVES = [
+    'open', 'close', 'commodity', 'txn', 'balance', 'pad', 'note', 'document',
+    'price', 'event', 'query', 'custom'
+]
+
+
+class Source(Base):
+    def __init__(self, vim):
+        super().__init__(vim)
+        self.vim = vim
+
+        self.name = 'beancount'
+        self.mark = '[bc]'
+        self.filetypes = ['beancount']
+        self.rank = 500
+        self.min_pattern_length = 0
+        self.attributes = collections.defaultdict(list)
+
+    def on_init(self, context):
+        if not HAS_BEANCOUNT:
+            self.error('Importing beancount failed.')
+
+    def on_event(self, context):
+        self.__make_cache(context)
+
+    def get_complete_position(self, context):
+        m = re.search(r'\S*$', context['input'])
+        return m.start() if m else -1
+
+    def gather_candidates(self, context):
+        attrs = self.attributes
+        if re.match(r'^\d{4}[/-]\d\d[/-]\d\d \w*$', context['input']):
+            return [{'word': x, 'kind': 'directive'} for x in DIRECTIVES]
+        # line that starts with whitespace (-> accounts)
+        if re.match(r'^(\s)+[\w:]+$', context['input']):
+            return [{'word': x, 'kind': 'account'} for x in attrs['accounts']]
+        # directive followed by account
+        if re.search(
+                r'(balance|document|note|open|close|pad(\s[\w:]+)?)'
+                r'\s[\w:]+$',
+                context['input']):
+            return [{'word': x, 'kind': 'account'} for x in attrs['accounts']]
+        # events
+        if re.search(r'event "[^"]*$', context['input']):
+            return [{
+                'word': '"{}"'.format(x),
+                'kind': 'event'
+            } for x in attrs['events']]
+        # commodity after number
+        if re.search(r'\s([0-9]+|[0-9][0-9,]+[0-9])(\.[0-9]*)?\s\w+$',
+                     context['input']):
+            return [{
+                'word': x,
+                'kind': 'commodity'
+            } for x in attrs['commodities']]
+        if not context['complete_str']:
+            return []
+        first = context['complete_str'][0]
+        if first == '#':
+            return [{'word': '#' + w, 'kind': 'tag'} for w in attrs['tags']]
+        elif first == '^':
+            return [{'word': '^' + w, 'kind': 'link'} for w in attrs['links']]
+        elif first == '"':
+            return [{
+                'word': '"{}"'.format(w),
+                'kind': 'payee'
+            } for w in attrs['payees']]
+        return []
+
+    def __make_cache(self, context):
+        if not HAS_BEANCOUNT:
+            return
+
+        entries, _, options = load_file(self.vim.eval("beancount#get_root()"))
+
+        accounts = set()
+        events = set()
+        links = set()
+        payees = set()
+        tags = set()
+
+        for entry in entries:
+            if isinstance(entry, data.Open):
+                accounts.add(entry.account)
+            elif isinstance(entry, data.Transaction):
+                if entry.payee:
+                    payees.add(entry.payee)
+            if hasattr(entry, 'links') and entry.links:
+                links.update(entry.links)
+            if hasattr(entry, 'tags') and entry.tags:
+                tags.update(entry.tags)
+            if isinstance(entry, data.Event):
+                events.add(entry.type)
+
+        self.attributes = {
+            'accounts': sorted(accounts),
+            'events': sorted(events),
+            'commodities': options['commodities'],
+            'links': sorted(links),
+            'payees': sorted(payees),
+            'tags': sorted(tags),
+        }