X-Git-Url: https://code.delx.au/gnu-emacs-elpa/blobdiff_plain/3f14abc2a5d72bdc9836b34ddb5e0ab2475a0bd4..e52579348d8529b0cff08a1f0a676cb0cc6f61c3:/company-capf.el

diff --git a/company-capf.el b/company-capf.el
index e27ae7a46..9eeb2482a 100644
--- a/company-capf.el
+++ b/company-capf.el
@@ -1,6 +1,6 @@
-;;; company-capf.el --- company-mode completion-at-point-functions back-end -*- lexical-binding: t -*-
+;;; company-capf.el --- company-mode completion-at-point-functions backend -*- lexical-binding: t -*-
 
-;; Copyright (C) 2013-2014  Free Software Foundation, Inc.
+;; Copyright (C) 2013-2016  Free Software Foundation, Inc.
 
 ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
 
@@ -28,29 +28,56 @@
 (require 'company)
 (require 'cl-lib)
 
+(defvar company--capf-cache nil)
+
 (defun company--capf-data ()
+  (let ((cache company--capf-cache))
+    (if (and (equal (current-buffer) (car cache))
+             (equal (point) (car (setq cache (cdr cache))))
+             (equal (buffer-chars-modified-tick) (car (setq cache (cdr cache)))))
+        (cadr cache)
+      (let ((data (company--capf-data-real)))
+        (setq company--capf-cache
+              (list (current-buffer) (point) (buffer-chars-modified-tick) data))
+        data))))
+
+(defun company--capf-data-real ()
   (cl-letf* (((default-value 'completion-at-point-functions)
               ;; Ignore tags-completion-at-point-function because it subverts
               ;; company-etags in the default value of company-backends, where
               ;; the latter comes later.
               (remove 'tags-completion-at-point-function
                       (default-value 'completion-at-point-functions)))
+             (completion-at-point-functions (company--capf-workaround))
              (data (run-hook-wrapped 'completion-at-point-functions
                                      ;; Ignore misbehaving functions.
                                      #'completion--capf-wrapper 'optimist)))
-    (when (and (consp (cdr data)) (numberp (nth 1 data))) data)))
+    (when (and (consp (cdr data)) (integer-or-marker-p (nth 1 data))) data)))
+
+(declare-function python-shell-get-process "python")
+
+(defun company--capf-workaround ()
+  ;; For http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18067
+  (if (or (not (listp completion-at-point-functions))
+          (not (memq 'python-completion-complete-at-point completion-at-point-functions))
+          (python-shell-get-process))
+      completion-at-point-functions
+    (remq 'python-completion-complete-at-point completion-at-point-functions)))
 
 (defun company-capf (command &optional arg &rest _args)
-  "`company-mode' back-end using `completion-at-point-functions'."
+  "`company-mode' backend using `completion-at-point-functions'."
   (interactive (list 'interactive))
   (pcase command
     (`interactive (company-begin-backend 'company-capf))
     (`prefix
      (let ((res (company--capf-data)))
        (when res
-         (if (> (nth 2 res) (point))
-             'stop
-           (buffer-substring-no-properties (nth 1 res) (point))))))
+         (let ((length (plist-get (nthcdr 4 res) :company-prefix-length))
+               (prefix (buffer-substring-no-properties (nth 1 res) (point))))
+           (cond
+            ((> (nth 2 res) (point)) 'stop)
+            (length (cons prefix length))
+            (t prefix))))))
     (`candidates
      (let ((res (company--capf-data)))
        (when res
@@ -125,9 +152,14 @@
     (`init nil)      ;Don't bother: plenty of other ways to initialize the code.
     (`post-completion
      (let* ((res (company--capf-data))
-            (exit-function (plist-get (nthcdr 4 res) :exit-function)))
+            (exit-function (plist-get (nthcdr 4 res) :exit-function))
+            (table (nth 3 res))
+            (pred (plist-get (nthcdr 4 res) :predicate)))
        (if exit-function
-           (funcall exit-function arg 'finished))))
+           ;; Follow the example of `completion--done'.
+           (funcall exit-function arg
+                    (if (eq (try-completion arg table pred) t)
+                        'finished 'sole)))))
     ))
 
 (provide 'company-capf)