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alchemist-complete.el
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;;; alchemist-complete.el --- Complete functionality for Elixir source code -*- lexical-binding: t -*-
;; Copyright © 2014-2015 Samuel Tonini
;; Author: Samuel Tonini <[email protected]
;; This file is not part of GNU Emacs.
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Complete functionality for Elixir and Erlang source code.
;;; Code:
(require 'cl-lib)
(require 'dash)
(require 'company-dabbrev-code)
(require 'alchemist-utils)
(defgroup alchemist-complete nil
"Complete functionality for Elixir source code."
:prefix "alchemist-complete-"
:group 'alchemist)
(defvar alchemist-company-last-completion nil)
(defun alchemist-complete--concat-prefix-with-functions (prefix functions &optional add-prefix)
(let* ((prefix (mapconcat 'concat (butlast (split-string prefix "\\.") 1) "."))
(candidates (-map (lambda (c) (concat prefix "." c)) (cdr functions))))
(if add-prefix
(push prefix candidates)
candidates)))
(defun alchemist-complete--add-prefix-to-function (prefix function)
(let* ((prefix (mapconcat 'concat (butlast (split-string prefix "\\.") 1) "."))
(candidate (concat prefix "." function)))
candidate))
(defun alchemist-complete--build-candidates (a-list)
(let* ((search-term (car a-list))
(candidates a-list)
(candidates (-map (lambda (f)
(let* ((candidate f)
(meta (if (string-match-p "^.+/" f)
(replace-regexp-in-string "^.+/" "/" f)
"")))
(cond
((and (string-match-p "^:" search-term)
(not (string-match-p "\\." search-term)))
(unless (string= search-term candidate)
(propertize (concat ":" candidate))
))
((string-match-p "\\." search-term)
(unless (string= search-term candidate)
(propertize (alchemist-complete--add-prefix-to-function (concat (alchemist-scope-extract-module search-term) ".")
(replace-regexp-in-string "/[0-9]$" "" candidate)) 'meta meta)))
(t (propertize (replace-regexp-in-string "/[0-9]$" "" candidate) 'meta meta)))))
candidates))
(candidates (-remove 'null candidates)))
(cond
((and (string-match-p "\\.$" search-term)
(not (string-match-p "\\.$" alchemist-company-last-completion)))
(push (alchemist-utils--remove-dot-at-the-end search-term) candidates))
(t candidates))))
(defun alchemist-complete--build-help-candidates (a-list)
(let* ((search-term (car a-list))
(candidates (cond ((> (alchemist-utils--count-char-in-str "\\." search-term) 1)
(let ((search (if (string-match-p "\\.[a-z0-9_\?!]+$" search-term)
(list (replace-regexp-in-string "\\.[a-z0-9_\?!]+$" "" search-term))
(list (alchemist-utils--remove-dot-at-the-end search-term))))
(candidates (-map (lambda (c)
(if (string-match-p "\\.[a-z0-9_\?!]+$" search-term)
(concat (replace-regexp-in-string "\\.[a-z0-9_\?!]+$" "." search-term) c)
(concat search-term c)))
(cdr a-list))))
(append search candidates)))
((string-match-p "\\.$" search-term)
(alchemist-complete--concat-prefix-with-functions search-term a-list t))
((string-match-p "\\.[a-z0-9_\?!]+$" search-term)
(alchemist-complete--concat-prefix-with-functions search-term a-list))
(t
a-list))))
(-distinct candidates)))
(defun alchemist-complete--output-to-list (output)
(let* ((output (replace-regexp-in-string "^cmp:" "" output))
(output (split-string output)))
(-remove 'null output)))
(defun alchemist-complete--clear-buffer (buffer)
"Clears the BUFFER from not used lines."
(with-current-buffer buffer
(delete-non-matching-lines "^cmp:" (point-min) (point-max))))
(defun alchemist-complete--build-candidates-from-process-output (output)
(let* ((output (alchemist-server-prepare-filter-output output))
(candidates (if (not (alchemist-utils--empty-string-p output))
(alchemist-complete--output-to-list
(alchemist--utils-clear-ansi-sequences output))
'()))
(candidates (if candidates
(alchemist-complete--build-candidates candidates)
'())))
candidates))
(defun alchemist-complete--completing-prompt (initial completing-collection)
(let* ((completing-collection (alchemist-complete--build-help-candidates completing-collection)))
(cond ((equal (length completing-collection) 1)
(car completing-collection))
(completing-collection
(completing-read
"Elixir help: "
completing-collection
nil
nil
(replace-regexp-in-string "\\.$" "" initial)))
(t initial))))
(defun alchemsit-complete--dabbrev-code-candidates ()
"This function uses a piece of functionality of company-dabbrev-code backend.
Please have a look at the company-dabbrev-code function for more
detailed information."
(let ((case-fold-search company-dabbrev-code-ignore-case)
(candidates (company-dabbrev--search
(company-dabbrev-code--make-regexp alchemist-company-last-completion)
company-dabbrev-code-time-limit
(pcase company-dabbrev-code-other-buffers
(`t (list major-mode))
(`code company-dabbrev-code-modes)
(`all `all))
t)))
(-distinct candidates)))
(provide 'alchemist-complete)
;;; alchemist-complete.el ends here