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

   1 (eval-when-compile (require 'cl))
   2
   3 (defface company-template-field
   4   '((((background dark)) (:background "yellow" :foreground "black"))
   5     (((background light)) (:background "orange" :foreground "black")))
   6   "*Face used for editable text in template fields."
   7   :group 'company)
   8
   9 (defvar company-template-nav-map
  10   (let ((keymap (make-sparse-keymap)))
  11     (define-key keymap [remap forward-word] 'company-template-forward-field)
  12     (define-key keymap [remap subword-forward] 'company-template-forward-field)
  13     ;; M-n
  14     keymap))
  15
  16 ;; interactive ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  17
  18 (defsubst company-template-templates-at (pos)
  19   (let (os)
  20     (dolist (o (overlays-at pos))
  21       (when (overlay-get o 'company-template-fields)
  22         (push o os)))
  23     os))
  24
  25 (defun company-template-move-to-first (templ)
  26   (interactive)
  27   (let ((fields (overlay-get templ 'company-template-fields)))
  28     (push-mark)
  29     (goto-char (apply 'min (mapcar 'overlay-start fields)))))
  30
  31 (defun company-template-forward-field ()
  32   (interactive)
  33   (let* ((templates (company-template-templates-at (point)))
  34          (minimum (apply 'max (mapcar 'overlay-end templates)))
  35          (fields (apply 'append
  36                         (mapcar (lambda (templ)
  37                                   (overlay-get templ 'company-template-fields))
  38                                 templates))))
  39     (dolist (pos (mapcar 'overlay-start fields))
  40       (and pos
  41            (> pos (point))
  42            (< pos minimum)
  43            (setq minimum pos)))
  44     (push-mark)
  45     (goto-char minimum)))
  46
  47 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  48
  49 (defvar company-template--buffer-templates nil)
  50 (make-variable-buffer-local 'company-template--buffer-templates)
  51
  52 (defun company-template-declare-template (beg end)
  53   (let ((ov (make-overlay beg end)))
  54     ;; (overlay-put ov 'face 'highlight)
  55     (overlay-put ov 'keymap company-template-nav-map)
  56     (overlay-put ov 'evaporate t)
  57     (push ov company-template--buffer-templates)
  58     (add-hook 'post-command-hook 'company-template-post-command nil t)
  59     ov))
  60
  61 (defun company-template-remove-template (templ)
  62   (mapc 'company-template-remove-field
  63         (overlay-get templ 'company-template-fields))
  64   (setq company-template--buffer-templates
  65         (delq templ company-template--buffer-templates))
  66   (delete-overlay templ))
  67
  68 (defun company-template-add-field (templ pos text)
  69   (assert templ)
  70   (save-excursion
  71     ;; (goto-char pos)
  72     (let ((ov (make-overlay pos pos))
  73           (siblings (overlay-get templ 'company-template-fields))
  74           (label (propertize text 'face 'company-template-field
  75                              'company-template-parent templ)))
  76       (overlay-put ov 'face 'highlight)
  77       (add-text-properties 0 1 '(cursor t) label)
  78       (overlay-put ov 'after-string label)
  79       ;; (overlay-put ov 'evaporate t)
  80       (overlay-put ov 'intangible t)
  81       (overlay-put ov 'company-template-parent templ)
  82       (overlay-put ov 'insert-in-front-hooks '(company-template-remove))
  83       (push ov siblings)
  84       (overlay-put templ 'company-template-fields siblings))))
  85
  86 (defun company-template-remove-field (field)
  87   (when (overlayp field)
  88     ;; (delete-region (overlay-start field) (overlay-end field))
  89     (delete-overlay field))
  90   ;; TODO: unlink
  91   )
  92
  93 (defun company-template-clean-up (&optional pos)
  94   "Clean up all templates that don't contain POS."
  95   (unless pos (setq pos (point)))
  96   (let ((local-ovs (overlays-in (- pos 2) pos)))
  97     (dolist (templ company-template--buffer-templates)
  98       (unless (memq templ local-ovs)
  99         (company-template-remove-template templ)))))
 100
 101 ;; hooks ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 102
 103 (defun company-template-remove (overlay after-p beg end &optional r)
 104   "Called when a snippet input prompt is modified."
 105   (when after-p
 106     (delete-overlay overlay)))
 107
 108 (defun company-template-post-command ()
 109   (company-template-clean-up)
 110   (unless company-template--buffer-templates
 111     (remove-hook 'post-command-hook 'company-template-post-command t)))
 112
 113 (provide 'company-template)
 114 ;;; company-template.el ends here