X-Git-Url: https://code.delx.au/gnu-emacs-elpa/blobdiff_plain/1331b718431597d4dcf2bf432ec642b456fe408b..b001e91a8c3bacb24b329c04f5feba419630b387:/company-capf.el diff --git a/company-capf.el b/company-capf.el index 455e9923f..0b88e2ba4 100644 --- a/company-capf.el +++ b/company-capf.el @@ -1,8 +1,8 @@ -;;; 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 Free Software Foundation, Inc. +;; Copyright (C) 2013-2015 Free Software Foundation, Inc. -;; Author: Stefan Monnier +;; Author: Stefan Monnier ;; This file is part of GNU Emacs. @@ -25,54 +25,127 @@ ;;; Code: +(require 'company) +(require 'cl-lib) + +(defvar company--capf-cache nil) + (defun company--capf-data () - (let ((data (run-hook-wrapped 'completion-at-point-functions - ;; Ignore misbehaving functions. - #'completion--capf-wrapper 'optimist))) - (when (consp data) 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))) + (data (run-hook-wrapped 'completion-at-point-functions + ;; Ignore misbehaving functions. + #'completion--capf-wrapper 'optimist))) + (when (and (consp (cdr data)) (integer-or-marker-p (nth 1 data))) data))) (defun company-capf (command &optional arg &rest _args) - "`company-mode' back-end using `completion-at-point-functions'. -Requires Emacs 24.1 or newer." + "`company-mode' backend using `completion-at-point-functions'." (interactive (list 'interactive)) - (case command - (interactive (company-begin-backend 'company-capf)) - (prefix + (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)))))) - (candidates + (`candidates (let ((res (company--capf-data))) (when res (let* ((table (nth 3 res)) (pred (plist-get (nthcdr 4 res) :predicate)) (meta (completion-metadata - (buffer-substring (nth 1 res) (nth 2 res)) - table pred)) + (buffer-substring (nth 1 res) (nth 2 res)) + table pred)) (sortfun (cdr (assq 'display-sort-function meta))) - (candidates (all-completions arg table pred))) - (if sortfun (funcall sortfun candidates) candidates))))) - (sorted + (candidates (completion-all-completions arg table pred (length arg))) + (last (last candidates)) + (base-size (and (numberp (cdr last)) (cdr last)))) + (when base-size + (setcdr last nil)) + (when sortfun + (setq candidates (funcall sortfun candidates))) + (if (not (zerop (or base-size 0))) + (let ((before (substring arg 0 base-size))) + (mapcar (lambda (candidate) + (concat before candidate)) + candidates)) + candidates))))) + (`sorted (let ((res (company--capf-data))) (when res (let ((meta (completion-metadata (buffer-substring (nth 1 res) (nth 2 res)) (nth 3 res) (plist-get (nthcdr 4 res) :predicate)))) (cdr (assq 'display-sort-function meta)))))) - (duplicates nil) ;Don't bother. - (no-cache t) ;FIXME: Improve! - (meta nil) ;FIXME: Return one-line docstring for `arg'. - (doc-buffer nil) ;FIXME: Return help buffer for `arg'. - (location nil) ;FIXME: Return (BUF . POS) or (FILE . LINENB) of `arg'. - (require-match nil) ;This should be a property of the front-end! - (init nil) ;Don't bother: plenty of other ways to initialize the code. - (post-completion + (`match + ;; Can't just use 0 when base-size (see above) is non-zero. + (let ((start (if (get-text-property 0 'font-lock-face arg) + 0 + (next-single-property-change 0 'font-lock-face arg)))) + (when start + ;; completions-common-part comes first, but we can't just look for this + ;; value because it can be in a list. + (or + (let ((value (get-text-property start 'font-lock-face arg))) + (text-property-not-all start (length arg) + 'font-lock-face value arg)) + (length arg))))) + (`duplicates t) + (`no-cache t) ;Not much can be done here, as long as we handle + ;non-prefix matches. + (`meta + (let ((f (plist-get (nthcdr 4 (company--capf-data)) :company-docsig))) + (when f (funcall f arg)))) + (`doc-buffer + (let ((f (plist-get (nthcdr 4 (company--capf-data)) :company-doc-buffer))) + (when f (funcall f arg)))) + (`location + (let ((f (plist-get (nthcdr 4 (company--capf-data)) :company-location))) + (when f (funcall f arg)))) + (`annotation + (save-excursion + ;; FIXME: `company-begin' sets `company-point' after calling + ;; `company--begin-new'. We shouldn't rely on `company-point' here, + ;; better to cache the capf-data value instead. However: we can't just + ;; save the last capf-data value in `prefix', because that command can + ;; get called more often than `candidates', and at any point in the + ;; buffer (https://github.com/company-mode/company-mode/issues/153). + ;; We could try propertizing the returned prefix string, but it's not + ;; passed to `annotation', and `company-prefix' is set only after + ;; `company--strip-duplicates' is called. + (when company-point + (goto-char company-point)) + (let ((f (plist-get (nthcdr 4 (company--capf-data)) :annotation-function))) + (when f (funcall f arg))))) + (`require-match + (plist-get (nthcdr 4 (company--capf-data)) :company-require-match)) + (`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)