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-;;; company-template.el --- utility library for template expansion
-
-;; Copyright (C) 2009-2010, 2013-2017, 2019 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 <https://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-faces)
-
-(defvar company-template-forward-field-item
- '(menu-item "" company-template-forward-field
- :filter company-template--keymap-filter))
-
-(defvar company-template-nav-map
- (let ((keymap (make-sparse-keymap)))
- (define-key keymap [tab] company-template-forward-field-item)
- (define-key keymap (kbd "TAB") company-template-forward-field-item)
- keymap))
-
-(defvar company-template-clear-field-item
- '(menu-item "" company-template-clear-field
- :filter company-template--keymap-filter))
-
-(defvar company-template-field-map
- (let ((keymap (make-sparse-keymap)))
- (set-keymap-parent keymap company-template-nav-map)
- (define-key keymap (kbd "C-d") company-template-clear-field-item)
- 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))
- (next-field-start (company-template-find-next-field)))
- (push-mark)
- (goto-char next-field-start)
- (company-template-remove-field (company-template-field-at start))))
-
-(defun company-template-clear-field ()
- "Clear the field at point."
- (interactive)
- (let ((ovl (company-template-field-at (point))))
- (when ovl
- (company-template-remove-field ovl t)
- (let ((after-clear-fn
- (overlay-get ovl 'company-template-after-clear)))
- (when (functionp after-clear-fn)
- (funcall after-clear-fn))))))
-
-(defun company-template--keymap-filter (cmd)
- (unless (run-hook-with-args-until-success 'yas-keymap-disable-hook)
- cmd))
-
-(defun company-template--after-clear-c-like-field ()
- "Function that can be called after deleting a field of a c-like template.
-For c-like templates it is set as `after-post-fn' property on fields in
-`company-template-add-field'. If there is a next field, delete everything
-from point to it. If there is no field after point, remove preceding comma
-if present."
- (let* ((pos (point))
- (next-field-start (company-template-find-next-field))
- (last-field-p (not (company-template-field-at next-field-start))))
- (cond ((and (not last-field-p)
- (< pos next-field-start)
- (string-match "^[ ]*,+[ ]*$" (buffer-substring-no-properties
- pos next-field-start)))
- (delete-region pos next-field-start))
- ((and last-field-p
- (looking-back ",+[ ]*" (line-beginning-position)))
- (delete-region (match-beginning 0) pos)))))
-
-(defun company-template-find-next-field ()
- (let* ((start (point))
- (templates (company-template-templates-at start))
- (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) minimum)
- (and pos
- (> pos start)
- (< pos minimum)
- (setq minimum pos)))))
-
-(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 beg end &optional display after-clear-fn)
- "Add new field to template TEMPL spanning from BEG to END.
-When DISPLAY is non-nil, set the respective property on the overlay.
-Leave point at the end of the field.
-AFTER-CLEAR-FN is a function that can be used to apply custom behavior
-after deleting a field in `company-template-remove-field'."
- (cl-assert templ)
- (when (> end (overlay-end templ))
- (move-overlay templ (overlay-start templ) end))
- (let ((ov (make-overlay beg end))
- (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))
- (when after-clear-fn
- (overlay-put ov 'company-template-after-clear after-clear-fn))
- (overlay-put ov 'keymap company-template-field-map)
- (overlay-put ov 'priority 101)
- (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)))
- (templ (company-template-declare-template beg end))
- paren-open paren-close)
- (with-syntax-table (make-syntax-table (syntax-table))
- (modify-syntax-entry ?< "(")
- (modify-syntax-entry ?> ")")
- (when (search-backward ")" beg t)
- (setq paren-close (point-marker))
- (forward-char 1)
- (delete-region (point) end)
- (backward-sexp)
- (forward-char 1)
- (setq paren-open (point-marker)))
- (when (search-backward ">" beg t)
- (let ((angle-close (point-marker)))
- (forward-char 1)
- (backward-sexp)
- (forward-char)
- (company-template--c-like-args templ angle-close)))
- (when (looking-back "\\((\\*)\\)(" (line-beginning-position))
- (delete-region (match-beginning 1) (match-end 1)))
- (when paren-open
- (goto-char paren-open)
- (company-template--c-like-args templ paren-close)))
- (if (overlay-get templ 'company-template-fields)
- (company-template-move-to-first templ)
- (company-template-remove-template templ)
- (goto-char end))))
-
-(defun company-template--c-like-args (templ end)
- (let ((last-pos (point)))
- (while (re-search-forward "\\([^,]+\\),?" end 'move)
- (when (zerop (car (parse-partial-sexp last-pos (point))))
- (company-template-add-field templ last-pos (match-end 1) nil
- #'company-template--after-clear-c-like-field)
- (skip-chars-forward " ")
- (setq last-pos (point))))))
-
-;; objc ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(defun company-template-objc-templatify (selector)
- (let* ((end (point-marker))
- (beg (- (point) (length selector) 1))
- (templ (company-template-declare-template beg end))
- (cnt 0))
- (save-excursion
- (goto-char beg)
- (catch 'stop
- (while (search-forward ":" end t)
- (if (looking-at "\\(([^)]*)\\) ?")
- (company-template-add-field templ (point) (match-end 1))
- ;; Not sure which conditions this case manifests under, but
- ;; apparently it did before, when I wrote the first test for this
- ;; function. FIXME: Revisit it.
- (company-template-add-field templ (point)
- (progn
- (insert (format "arg%d" cnt))
- (point)))
- (when (< (point) end)
- (insert " "))
- (cl-incf cnt))
- (when (>= (point) end)
- (throw 'stop t)))))
- (company-template-move-to-first templ)))
-
-(provide 'company-template)
-;;; company-template.el ends here
generated by cgit v1.2.1 (git 2.18.0) at 2024-09-20 06:42:02 +0000