my-emacs-d/elpa/company-0.8.5/company-template.el

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2014-10-05 12:57:41 +00:00
;;; company-template.el
;; Copyright (C) 2009, 2010, 2013 Free Software Foundation, Inc.
;; 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/>.
;;; Code:
(require 'cl-lib)
(defface company-template-field
'((((background dark)) (:background "yellow" :foreground "black"))
(((background light)) (:background "orange" :foreground "black")))
"Face used for editable text in template fields."
:group 'company)
(defvar company-template-nav-map
(let ((keymap (make-sparse-keymap)))
(define-key keymap [tab] 'company-template-forward-field)
(define-key keymap (kbd "TAB") 'company-template-forward-field)
keymap))
(defvar-local company-template--buffer-templates nil)
;; interactive ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun company-template-templates-at (pos)
(let (os)
(dolist (o (overlays-at pos))
;; FIXME: Always return the whole list of templates?
;; We remove templates not at point after every command.
(when (memq o company-template--buffer-templates)
(push o os)))
os))
(defun company-template-move-to-first (templ)
(interactive)
(goto-char (overlay-start templ))
(company-template-forward-field))
(defun company-template-forward-field ()
(interactive)
(let* ((start (point))
(templates (company-template-templates-at (point)))
(minimum (apply 'max (mapcar 'overlay-end templates)))
(fields (cl-loop for templ in templates
append (overlay-get templ 'company-template-fields))))
(dolist (pos (mapcar 'overlay-start fields))
(and pos
(> pos (point))
(< pos minimum)
(setq minimum pos)))
(push-mark)
(goto-char minimum)
(company-template-remove-field (company-template-field-at start))))
(defun company-template-field-at (&optional point)
(cl-loop for ovl in (overlays-at (or point (point)))
when (overlay-get ovl 'company-template-parent)
return ovl))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun company-template-declare-template (beg end)
(let ((ov (make-overlay beg end)))
;; (overlay-put ov 'face 'highlight)
(overlay-put ov 'keymap company-template-nav-map)
(overlay-put ov 'priority 101)
(overlay-put ov 'evaporate t)
(push ov company-template--buffer-templates)
(add-hook 'post-command-hook 'company-template-post-command nil t)
ov))
(defun company-template-remove-template (templ)
(mapc 'company-template-remove-field
(overlay-get templ 'company-template-fields))
(setq company-template--buffer-templates
(delq templ company-template--buffer-templates))
(delete-overlay templ))
(defun company-template-add-field (templ pos text &optional display)
"Add new field to template TEMPL at POS, inserting TEXT.
When DISPLAY is non-nil, set the respective property on the overlay.
Leave point at the end of the field."
(cl-assert templ)
(goto-char pos)
(insert text)
(when (> (point) (overlay-end templ))
(move-overlay templ (overlay-start templ) (point)))
(let ((ov (make-overlay pos (+ pos (length text))))
(siblings (overlay-get templ 'company-template-fields)))
;; (overlay-put ov 'evaporate t)
(overlay-put ov 'intangible t)
(overlay-put ov 'face 'company-template-field)
(when display
(overlay-put ov 'display display))
(overlay-put ov 'company-template-parent templ)
(overlay-put ov 'insert-in-front-hooks '(company-template-insert-hook))
(push ov siblings)
(overlay-put templ 'company-template-fields siblings)))
(defun company-template-remove-field (ovl &optional clear)
(when (overlayp ovl)
(when (overlay-buffer ovl)
(when clear
(delete-region (overlay-start ovl) (overlay-end ovl)))
(delete-overlay ovl))
(let* ((templ (overlay-get ovl 'company-template-parent))
(siblings (overlay-get templ 'company-template-fields)))
(setq siblings (delq ovl siblings))
(overlay-put templ 'company-template-fields siblings))))
(defun company-template-clean-up (&optional pos)
"Clean up all templates that don't contain POS."
(let ((local-ovs (overlays-at (or pos (point)))))
(dolist (templ company-template--buffer-templates)
(unless (memq templ local-ovs)
(company-template-remove-template templ)))))
;; hooks ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun company-template-insert-hook (ovl after-p &rest _ignore)
"Called when a snippet input prompt is modified."
(unless after-p
(company-template-remove-field ovl t)))
(defun company-template-post-command ()
(company-template-clean-up)
(unless company-template--buffer-templates
(remove-hook 'post-command-hook 'company-template-post-command t)))
;; common ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun company-template-c-like-templatify (call)
(let* ((end (point-marker))
(beg (- (point) (length call)))
(cnt 0))
(when (re-search-backward ")" beg t)
(delete-region (match-end 0) end))
(goto-char beg)
(when (search-forward "(" end 'move)
(if (eq (char-after) ?\))
(forward-char 1)
(let ((templ (company-template-declare-template beg end)))
(while (re-search-forward (concat " *\\([^,)]*\\)[,)]") end t)
(let ((sig (match-string 1)))
(delete-region (match-beginning 1) (match-end 1))
(save-excursion
(company-template-add-field templ (match-beginning 1)
(format "arg%d" cnt) sig))
(cl-incf cnt)))
(company-template-move-to-first templ))))))
(provide 'company-template)
;;; company-template.el ends here