my-emacs-d/elpa/company-20160626.1903/company-eclim.el

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;;; company-eclim.el --- company-mode completion backend for Eclim
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;; Copyright (C) 2009, 2011, 2013, 2015 Free Software Foundation, Inc.
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;; Author: Nikolaj Schumacher
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
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;; Using `emacs-eclim' together with (or instead of) this backend is
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;; recommended, as it allows you to use other Eclim features.
;;
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;; The alternative backend provided by `emacs-eclim' uses `yasnippet'
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;; instead of `company-template' to expand function calls, and it supports
;; some languages other than Java.
;;; Code:
(require 'company)
(require 'company-template)
(require 'cl-lib)
(defgroup company-eclim nil
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"Completion backend for Eclim."
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:group 'company)
(defun company-eclim-executable-find ()
(let (file)
(cl-dolist (eclipse-root '("/Applications/eclipse" "/usr/lib/eclipse"
"/usr/local/lib/eclipse"))
(and (file-exists-p (setq file (expand-file-name "plugins" eclipse-root)))
(setq file (car (last (directory-files file t "^org.eclim_"))))
(file-exists-p (setq file (expand-file-name "bin/eclim" file)))
(cl-return file)))))
(defcustom company-eclim-executable
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(or (bound-and-true-p eclim-executable)
(executable-find "eclim")
(company-eclim-executable-find))
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"Location of eclim executable."
:type 'file)
(defcustom company-eclim-auto-save t
"Determines whether to save the buffer when retrieving completions.
eclim can only complete correctly when the buffer has been saved."
:type '(choice (const :tag "Off" nil)
(const :tag "On" t)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar-local company-eclim--project-dir 'unknown)
(defvar-local company-eclim--project-name nil)
(declare-function json-read "json")
(defvar json-array-type)
(defun company-eclim--call-process (&rest args)
(let ((coding-system-for-read 'utf-8)
res)
(require 'json)
(with-temp-buffer
(if (= 0 (setq res (apply 'call-process company-eclim-executable nil t nil
"-command" args)))
(let ((json-array-type 'list))
(goto-char (point-min))
(unless (eobp)
(json-read)))
(message "Company-eclim command failed with error %d:\n%s" res
(buffer-substring (point-min) (point-max)))
nil))))
(defun company-eclim--project-list ()
(company-eclim--call-process "project_list"))
(defun company-eclim--project-dir ()
(if (eq company-eclim--project-dir 'unknown)
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(let ((dir (locate-dominating-file buffer-file-name ".project")))
(when dir
(setq company-eclim--project-dir
(directory-file-name
(expand-file-name dir)))))
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company-eclim--project-dir))
(defun company-eclim--project-name ()
(or company-eclim--project-name
(let ((dir (company-eclim--project-dir)))
(when dir
(setq company-eclim--project-name
(cl-loop for project in (company-eclim--project-list)
when (equal (cdr (assoc 'path project)) dir)
return (cdr (assoc 'name project))))))))
(defun company-eclim--candidates (prefix)
(interactive "d")
(let ((project-file (file-relative-name buffer-file-name
(company-eclim--project-dir)))
completions)
(when company-eclim-auto-save
(when (buffer-modified-p)
(basic-save-buffer))
;; FIXME: Sometimes this isn't finished when we complete.
(company-eclim--call-process "java_src_update"
"-p" (company-eclim--project-name)
"-f" project-file))
(dolist (item (cdr (assoc 'completions
(company-eclim--call-process
"java_complete" "-p" (company-eclim--project-name)
"-f" project-file
"-o" (number-to-string
(company-eclim--search-point prefix))
"-e" "utf-8"
"-l" "standard"))))
(let* ((meta (cdr (assoc 'info item)))
(completion meta))
(when (string-match " ?[(:-]" completion)
(setq completion (substring completion 0 (match-beginning 0))))
(put-text-property 0 1 'meta meta completion)
(push completion completions)))
(let ((completion-ignore-case nil))
(all-completions prefix completions))))
(defun company-eclim--search-point (prefix)
(if (or (cl-plusp (length prefix)) (eq (char-before) ?.))
(1- (point))
(point)))
(defun company-eclim--meta (candidate)
(get-text-property 0 'meta candidate))
(defun company-eclim--annotation (candidate)
(let ((meta (company-eclim--meta candidate)))
(when (string-match "\\(([^-]*\\) -" meta)
(substring meta (match-beginning 1) (match-end 1)))))
(defun company-eclim--prefix ()
(let ((prefix (company-grab-symbol)))
(when prefix
;; Completion candidates for annotations don't include '@'.
(when (eq ?@ (string-to-char prefix))
(setq prefix (substring prefix 1)))
prefix)))
(defun company-eclim (command &optional arg &rest ignored)
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"`company-mode' completion backend for Eclim.
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Eclim provides access to Eclipse Java IDE features for other editors.
Eclim version 1.7.13 or newer (?) is required.
Completions only work correctly when the buffer has been saved.
`company-eclim-auto-save' determines whether to do this automatically."
(interactive (list 'interactive))
(cl-case command
(interactive (company-begin-backend 'company-eclim))
(prefix (and (derived-mode-p 'java-mode 'jde-mode)
buffer-file-name
company-eclim-executable
(company-eclim--project-name)
(not (company-in-string-or-comment))
(or (company-eclim--prefix) 'stop)))
(candidates (company-eclim--candidates arg))
(meta (company-eclim--meta arg))
;; because "" doesn't return everything
(no-cache (equal arg ""))
(annotation (company-eclim--annotation arg))
(post-completion (let ((anno (company-eclim--annotation arg)))
(when anno
(insert anno)
(company-template-c-like-templatify anno))))))
(provide 'company-eclim)
;;; company-eclim.el ends here