code.delx.au - gnu-emacs-elpa/blob - company.el

   1 (eval-when-compile (require 'cl))
   2
   3 (defgroup company nil
   4   ""
   5   :group 'abbrev
   6   :group 'convenience
   7   :group 'maching)
   8
   9 (defface company-tooltip
  10   '((t :background "yellow"
  11        :foreground "black"))
  12   "*"
  13   :group 'company)
  14
  15 (defface company-tooltip-selection
  16   '((t :background "orange1"
  17        :foreground "black"))
  18   "*"
  19   :group 'company)
  20
  21 (defface company-tooltip-common
  22   '((t :inherit company-tooltip
  23        :foreground "red"))
  24   "*"
  25   :group 'company)
  26
  27 (defface company-tooltip-common-selection
  28   '((t :inherit company-tooltip-selection
  29        :foreground "red"))
  30   "*"
  31   :group 'company)
  32
  33 (defcustom company-tooltip-limit 10
  34   "*"
  35   :group 'company
  36   :type 'integer)
  37
  38 (defface company-preview
  39   '((t :background "blue4"
  40        :foreground "wheat"))
  41   "*"
  42   :group 'company)
  43
  44 (defface company-preview-common
  45   '((t :inherit company-preview
  46        :foreground "red"))
  47   "*"
  48   :group 'company)
  49
  50 (defface company-echo nil
  51   "*"
  52   :group 'company)
  53
  54 (defface company-echo-common
  55   '((((background dark)) (:foreground "firebrick1"))
  56     (((background light)) (:background "firebrick4")))
  57   "*"
  58   :group 'company)
  59
  60 (defcustom company-backends '(company-elisp-completion)
  61   "*"
  62   :group 'company
  63   :type '(repeat (function :tag "function" nil)))
  64
  65 (defcustom company-minimum-prefix-length 3
  66   "*"
  67   :group 'company
  68   :type '(integer :tag "prefix length"))
  69
  70 (defvar company-timer nil)
  71
  72 (defun company-timer-set (variable value)
  73   (set variable value)
  74   (when company-timer (cancel-timer company-timer))
  75   (when (numberp value)
  76     (setq company-timer (run-with-idle-timer value t 'company-idle-begin))))
  77
  78 (defcustom company-idle-delay .7
  79   "*"
  80   :set 'company-timer-set
  81   :group 'company
  82   :type '(choice (const :tag "never (nil)" nil)
  83                  (const :tag "immediate (t)" t)
  84                  (number :tag "seconds")))
  85
  86 ;;; mode ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  87
  88 (defvar company-mode-map
  89   (let ((keymap (make-sparse-keymap)))
  90     (define-key keymap (kbd "M-n") 'company-select-next)
  91     (define-key keymap (kbd "M-p") 'company-select-previous)
  92     (define-key keymap (kbd "M-<return>") 'company-complete-selection)
  93     (define-key keymap "\t" 'company-complete-common)
  94     keymap))
  95
  96 ;;;###autoload
  97 (define-minor-mode company-mode
  98   ""
  99   nil " comp" company-mode-map
 100   (if company-mode
 101       (progn
 102         (add-hook 'pre-command-hook 'company-pre-command nil t)
 103         (add-hook 'post-command-hook 'company-post-command nil t)
 104         (company-timer-set 'company-idle-delay
 105                            company-idle-delay))
 106     (remove-hook 'pre-command-hook 'company-pre-command t)
 107     (remove-hook 'post-command-hook 'company-post-command t)
 108     (company-cancel)))
 109
 110 ;;; backends ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 111
 112 (defun company-grab (regexp &optional expression)
 113   (when (looking-back regexp)
 114     (or (match-string-no-properties (or expression 0)) "")))
 115
 116 (defun company-in-string-or-comment (&optional point)
 117   (let ((pos (syntax-ppss)))
 118     (or (nth 3 pos) (nth 4 pos) (nth 7 pos))))
 119
 120 ;;; elisp
 121
 122 (defvar company-lisp-symbol-regexp
 123   "\\_<\\(\\sw\\|\\s_\\)+\\_>\\=")
 124
 125 (defun company-grab-lisp-symbol ()
 126   (let ((prefix (or (company-grab company-lisp-symbol-regexp) "")))
 127     (unless (and (company-in-string-or-comment (- (point) (length prefix)))
 128                  (/= (char-before (- (point) (length prefix))) ?`))
 129       prefix)))
 130
 131 (defun company-elisp-completion (command &optional arg &rest ignored)
 132   (case command
 133     ('prefix (and (eq major-mode 'emacs-lisp-mode)
 134                   (company-grab-lisp-symbol)))
 135     ('candidates (let ((completion-ignore-case nil))
 136                    (all-completions arg obarray
 137                                     (lambda (symbol) (or (boundp symbol)
 138                                                          (fboundp symbol))))))))
 139
 140 ;;; completion mechanism ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 141
 142 (defvar company-backend nil)
 143 (make-variable-buffer-local 'company-backend)
 144
 145 (defvar company-prefix nil)
 146 (make-variable-buffer-local 'company-prefix)
 147
 148 (defvar company-candidates nil)
 149 (make-variable-buffer-local 'company-candidates)
 150
 151 (defvar company-common nil)
 152 (make-variable-buffer-local 'company-common)
 153
 154 (defvar company-selection 0)
 155 (make-variable-buffer-local 'company-selection)
 156
 157 (defvar company-selection-changed nil)
 158 (make-variable-buffer-local 'company-selection-changed)
 159
 160 (defvar company-point nil)
 161 (make-variable-buffer-local 'company-point)
 162
 163 (defsubst company-strip-prefix (str)
 164   (substring str (length company-prefix)))
 165
 166 (defsubst company-offset (display-limit)
 167   (let ((offset (- company-selection display-limit -1)))
 168     (max offset 0)))
 169
 170 (defsubst company-should-complete (prefix)
 171   (and (eq company-idle-delay t)
 172        (>= (length prefix) company-minimum-prefix-length)))
 173
 174 (defun company-idle-begin ()
 175   (and company-mode
 176        (not company-candidates)
 177        (let ((company-idle-delay t))
 178          (company-begin)
 179          (company-post-command))))
 180
 181 (defun company-manual-begin ()
 182   (and company-mode
 183        (not company-candidates)
 184        (let ((company-idle-delay t)
 185              (company-minimum-prefix-length 0))
 186          (company-begin)))
 187   ;; Return non-nil if active.
 188   company-candidates)
 189
 190 (defun company-continue-or-cancel ()
 191   (when company-candidates
 192     (let ((old-point (- company-point (length company-prefix)))
 193           (company-idle-delay t)
 194           (company-minimum-prefix-length 0))
 195       ;; TODO: Make more efficient.
 196       (setq company-candidates nil)
 197       (company-begin)
 198       (unless (and company-candidates
 199                    (equal old-point (- company-point (length company-prefix))))
 200         (company-cancel))
 201       company-candidates)))
 202
 203 (defun company-begin ()
 204   (or (company-continue-or-cancel)
 205       (let ((completion-ignore-case nil) ;; TODO: make this optional
 206             prefix)
 207         (dolist (backend company-backends)
 208           (when (setq prefix (funcall backend 'prefix))
 209             (when (company-should-complete prefix)
 210               (setq company-backend backend
 211                     company-prefix prefix
 212                     company-candidates
 213                     (funcall company-backend 'candidates prefix)
 214                     company-common (try-completion prefix company-candidates)
 215                     company-selection 0
 216                     company-point (point)))
 217             (return prefix)))
 218         (unless (and company-candidates
 219                      (not (eq t company-common)))
 220           (company-cancel)))))
 221
 222 (defun company-cancel ()
 223   (setq company-backend nil
 224         company-prefix nil
 225         company-candidates nil
 226         company-common nil
 227         company-selection 0
 228         company-selection-changed nil
 229         company-point nil)
 230   (company-pseudo-tooltip-hide)
 231   (company-echo-hide))
 232
 233 (defun company-pre-command ()
 234   (company-preview-hide)
 235   (company-pseudo-tooltip-hide)
 236   (company-echo-refresh))
 237
 238 (defun company-post-command ()
 239   (unless (equal (point) company-point)
 240     (company-begin))
 241   (when company-candidates
 242     (company-echo-show company-candidates))
 243     (company-pseudo-tooltip-show-at-point (- (point) (length company-prefix))
 244                                           company-candidates
 245                                           company-selection)
 246     (company-preview-show-at-point (point) company-candidates
 247                                    company-selection))
 248
 249 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 250
 251 (defun company-select-next ()
 252   (interactive)
 253   (when (company-manual-begin)
 254     (setq company-selection (min (1- (length company-candidates))
 255                                  (1+ company-selection))
 256           company-selection-changed t)))
 257
 258 (defun company-select-previous ()
 259   (interactive)
 260   (when (company-manual-begin)
 261     (setq company-selection (max 0 (1- company-selection))
 262           company-selection-changed t)))
 263
 264 (defun company-complete-selection ()
 265   (interactive)
 266   (when (company-manual-begin)
 267     (insert (company-strip-prefix (nth company-selection company-candidates)))))
 268
 269 (defun company-complete-common ()
 270   (interactive)
 271   (when (company-manual-begin)
 272     (insert (company-strip-prefix company-common))))
 273
 274 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 275
 276 (defconst company-space-strings-limit 100)
 277
 278 (defconst company-space-strings
 279   (let (lst)
 280     (dotimes (i company-space-strings-limit)
 281       (push (make-string (- company-space-strings-limit 1 i) ?\  ) lst))
 282     (apply 'vector lst)))
 283
 284 (defsubst company-space-string (len)
 285   (if (< len company-space-strings-limit)
 286       (aref company-space-strings len)
 287     (make-string len ?\ )))
 288
 289 (defsubst company-safe-substring (str from &optional to)
 290   (let ((len (length str)))
 291     (if (> from len)
 292         ""
 293       (if (and to (> to len))
 294           (concat (substring str from)
 295                   (company-space-string (- to len)))
 296         (substring str from to)))))
 297
 298 ;;; pseudo-tooltip ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 299
 300 (defvar company-pseudo-tooltip-overlay nil)
 301 (make-variable-buffer-local 'company-pseudo-tooltip-overlay)
 302
 303 ;;; propertize
 304
 305 (defun company-fill-propertize (line width selected)
 306   (setq line (company-safe-substring line 0 width))
 307   (add-text-properties 0 width
 308                        (list 'face (if selected
 309                                        'company-tooltip-selection
 310                                      'company-tooltip)) line)
 311   (add-text-properties 0 (length company-common)
 312                        (list 'face (if selected
 313                                        'company-tooltip-common-selection
 314                                      'company-tooltip-common)) line)
 315   line)
 316
 317 (defun company-fill-propertize-lines (column lines selection)
 318   (let ((width 0)
 319         (lines-copy lines)
 320         (len (min company-tooltip-limit (length lines)))
 321         new)
 322     (dotimes (i len)
 323       (setq width (max (length (pop lines-copy)) width)))
 324     (setq width (min width (- (window-width) column)))
 325     (dotimes (i len)
 326       (push (company-fill-propertize (pop lines) width (equal i selection))
 327             new))
 328     (nreverse new)))
 329
 330 ;;; replace
 331
 332 (defun company-buffer-lines (beg end)
 333   (goto-char beg)
 334   (let ((row (cdr (posn-col-row (posn-at-point))))
 335         lines)
 336     (while (< (point) end)
 337       (move-to-window-line (incf row))
 338       (push (buffer-substring beg (min end (1- (point)))) lines)
 339       (setq beg (point)))
 340     (nreverse lines)))
 341
 342 (defun company-modify-line (old new offset)
 343   (concat (company-safe-substring old 0 offset)
 344           new
 345           (company-safe-substring old (+ offset (length new)))))
 346
 347 (defun company-modified-substring (beg end lines column)
 348   (let ((old (company-buffer-lines beg end))
 349         new)
 350     ;; Inject into old lines.
 351     (while old
 352       (push (company-modify-line (pop old) (pop lines) column) new))
 353     ;; Append whole new lines.
 354     (while lines
 355       (push (company-modify-line "" (pop lines) column) new))
 356     (concat (mapconcat 'identity (nreverse new) "\n")
 357             "\n")))
 358
 359 ;; show
 360
 361 (defun company-pseudo-tooltip-show (row column lines &optional selection)
 362   (company-pseudo-tooltip-hide)
 363   (unless lines (error "No text provided"))
 364   (save-excursion
 365
 366     ;; Scroll to offset.
 367     (let ((offset (company-offset company-tooltip-limit)))
 368       (setq lines (nthcdr offset lines))
 369       (decf selection offset))
 370
 371     (setq lines (company-fill-propertize-lines column lines selection))
 372
 373
 374     (move-to-column 0)
 375     (move-to-window-line row)
 376     (let ((beg (point))
 377           (end (save-excursion
 378                  (move-to-window-line (min (window-height)
 379                                            (+ row company-tooltip-limit)))
 380                  (point)))
 381           str)
 382
 383       (setq company-pseudo-tooltip-overlay (make-overlay beg end))
 384
 385       (overlay-put company-pseudo-tooltip-overlay 'before-string
 386                    (company-modified-substring beg end lines column))
 387       (overlay-put company-pseudo-tooltip-overlay 'invisible t)
 388       (overlay-put company-pseudo-tooltip-overlay 'window (selected-window)))))
 389
 390 (defun company-pseudo-tooltip-show-at-point (pos text &optional selection)
 391   (let ((col-row (posn-col-row (posn-at-point pos))))
 392     (company-pseudo-tooltip-show (1+ (cdr col-row))
 393                                  (car col-row) text selection)))
 394
 395 (defun company-pseudo-tooltip-hide ()
 396   (when company-pseudo-tooltip-overlay
 397     (delete-overlay company-pseudo-tooltip-overlay)
 398     (setq company-pseudo-tooltip-overlay nil)))
 399
 400 ;;; overlay ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 401
 402 (defvar company-preview-overlay nil)
 403 (make-variable-buffer-local 'company-preview-overlay)
 404
 405 (defun company-preview-show-at-point (pos text &optional selection)
 406   (company-preview-hide)
 407
 408   (setq company-preview-overlay (make-overlay pos pos))
 409
 410   (let ((completion (company-strip-prefix (nth company-selection
 411                                                company-candidates))))
 412     (and (equal pos (point))
 413          (not (equal completion ""))
 414          (add-text-properties 0 1 '(cursor t) completion))
 415
 416     (setq completion (propertize completion 'face 'company-preview))
 417     (add-text-properties 0 (- (length company-common) (length company-prefix))
 418                          '(face company-preview-common) completion)
 419
 420     (overlay-put company-preview-overlay 'after-string completion)
 421     (overlay-put company-preview-overlay 'window (selected-window))))
 422
 423 (defun company-preview-hide ()
 424   (when company-preview-overlay
 425     (delete-overlay company-preview-overlay)
 426     (setq company-preview-overlay nil)))
 427
 428 ;;; echo ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 429
 430 (defvar company-echo-last-msg nil)
 431 (make-variable-buffer-local 'company-echo-last-msg)
 432
 433 (defun company-echo-refresh ()
 434   (let ((message-log-max nil))
 435     (if company-echo-last-msg
 436         (message "%s" company-echo-last-msg)
 437       (message ""))))
 438
 439 (defun company-echo-show (candidates)
 440
 441   ;; Roll to selection.
 442   (setq candidates (nthcdr company-selection candidates))
 443
 444   (let ((limit (window-width (minibuffer-window)))
 445         (len 0)
 446         comp msg)
 447     (while candidates
 448       (setq comp (pop candidates)
 449             len (+ len 1 (length comp)))
 450       (if (>= len limit)
 451           (setq candidates nil)
 452         (setq comp (propertize comp 'face 'company-echo))
 453         (add-text-properties 0 (length company-common)
 454                              '(face company-echo-common) comp)
 455         (push comp msg)))
 456
 457     (setq company-echo-last-msg (mapconcat 'identity (nreverse msg) " "))
 458     (company-echo-refresh)))
 459
 460 (defun company-echo-hide ()
 461   (setq company-echo-last-msg nil))
 462
 463 (provide 'company)
 464 ;;; company.el ends here