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|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Zencoding minor mode
(defgroup zencoding nil
"Customization group for zencoding-mode."
:group 'convenience)
(defun zencoding-expr-on-line ()
"Extract a zencoding expression and the corresponding bounds
for the current line."
(let* ((start (line-beginning-position))
(end (line-end-position))
(line (buffer-substring-no-properties start end))
(expr (zencoding-regex "\\([ \t]*\\)\\([^\n]+\\)" line 2)))
(if (first expr)
(list (first expr) start end))))
(defcustom zencoding-indentation 4
"Number of spaces used for indentation."
:type '(number :tag "Spaces")
:group 'zencoding)
(defun zencoding-prettify (markup indent)
(let ((first-col (format (format "%%%ds" indent) ""))
(tab (format (format "%%%ds" zencoding-indentation) "")))
(concat first-col
(replace-regexp-in-string "\n" (concat "\n" first-col)
(replace-regexp-in-string " " tab markup)))))
(defun zencoding-transform (input)
(if (eql major-mode 'css-mode)
(zencoding-css-transform input)
(zencoding-html-transform input)))
;;;###autoload
(defun zencoding-expand-line (arg)
"Replace the current line's zencode expression with the corresponding expansion.
If prefix ARG is given or region is visible call `zencoding-preview' to start an
interactive preview.
Otherwise expand line directly.
For more information see `zencoding-mode'."
(interactive "P")
(let* ((here (point))
(preview (if zencoding-preview-default (not arg) arg))
(beg (if preview
(progn
(beginning-of-line)
(skip-chars-forward " \t")
(point))
(when mark-active (region-beginning))))
(end (if preview
(progn
(end-of-line)
(skip-chars-backward " \t")
(point))
(when mark-active (region-end)))))
(if beg
(progn
(goto-char here)
(zencoding-preview beg end))
(let ((expr (zencoding-expr-on-line)))
(if expr
(let ((markup (zencoding-transform (first expr))))
(when markup
(let ((pretty (zencoding-prettify markup (current-indentation))))
(save-excursion
(delete-region (second expr) (third expr))
(zencoding-insert-and-flash pretty))))))))))
(defvar zencoding-mode-keymap nil
"Keymap for zencode minor mode.")
(if zencoding-mode-keymap
nil
(progn
(setq zencoding-mode-keymap (make-sparse-keymap))
(define-key zencoding-mode-keymap (kbd "C-j") 'zencoding-expand-line)
(define-key zencoding-mode-keymap (kbd "<C-return>") 'zencoding-expand-line)))
;;;###autoload
(define-minor-mode zencoding-mode
"Minor mode for writing HTML and CSS markup.
With zen coding for HTML and CSS you can write a line like
ul#name>li.item*2
and have it expanded to
<ul id=\"name\">
<li class=\"item\"></li>
<li class=\"item\"></li>
</ul>
This minor mode defines keys for quick access:
\\{zencoding-mode-keymap}
Home page URL `http://www.emacswiki.org/emacs/ZenCoding'.
See also `zencoding-expand-line'."
:lighter " Zen"
:keymap zencoding-mode-keymap)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Zencoding yasnippet integration
(defun zencoding-transform-yas (input)
(let* ((leaf-count 0)
(zencoding-leaf-function
(lambda ()
(format "$%d" (incf leaf-count)))))
(zencoding-transform input)))
;;;###autoload
(defun zencoding-expand-yas ()
(interactive)
(let ((expr (zencoding-expr-on-line)))
(if expr
(let* ((markup (zencoding-transform-yas (first expr)))
(filled (replace-regexp-in-string "><" ">\n<" markup)))
(delete-region (second expr) (third expr))
(insert filled)
(indent-region (second expr) (point))
(yas/expand-snippet
(buffer-substring (second expr) (point))
(second expr) (point))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Real-time preview
;;
;;;;;;;;;;
;; Lennart's version
(defvar zencoding-preview-input nil)
(make-local-variable 'zencoding-preview-input)
(defvar zencoding-preview-output nil)
(make-local-variable 'zencoding-preview-output)
(defvar zencoding-old-show-paren nil)
(make-local-variable 'zencoding-old-show-paren)
(defface zencoding-preview-input
'((default :box t :inherit secondary-selection))
"Face for preview input field."
:group 'zencoding)
(defface zencoding-preview-output
'((default :inherit highlight))
"Face for preview output field."
:group 'zencoding)
(defvar zencoding-preview-keymap
(let ((map (make-sparse-keymap)))
(define-key map (kbd "RET") 'zencoding-preview-accept)
(define-key map (kbd "<return>") 'zencoding-preview-accept)
(define-key map [(control ?g)] 'zencoding-preview-abort)
map))
(defun zencoding-preview-accept ()
(interactive)
(let ((ovli zencoding-preview-input))
(if (not (and (overlayp ovli)
(bufferp (overlay-buffer ovli))))
(message "Preview is not active")
(let* ((indent (current-indentation))
(markup (zencoding-preview-transformed indent)))
(when markup
(delete-region (line-beginning-position) (overlay-end ovli))
(zencoding-insert-and-flash markup)))))
(zencoding-preview-abort))
(defvar zencoding-flash-ovl nil)
(make-variable-buffer-local 'zencoding-flash-ovl)
(defun zencoding-remove-flash-ovl (buf)
(with-current-buffer buf
(when (overlayp zencoding-flash-ovl)
(delete-overlay zencoding-flash-ovl))
(setq zencoding-flash-ovl nil)))
(defcustom zencoding-preview-default t
"If non-nil then preview is the default action.
This determines how `zencoding-expand-line' works by default."
:type 'boolean
:group 'zencoding)
(defcustom zencoding-insert-flash-time 0.5
"Time to flash insertion.
Set this to a negative number if you do not want flashing the
expansion after insertion."
:type '(number :tag "Seconds")
:group 'zencoding)
(defun zencoding-insert-and-flash (markup)
(zencoding-remove-flash-ovl (current-buffer))
(let ((here (point)))
(insert markup)
(setq zencoding-flash-ovl (make-overlay here (point)))
(overlay-put zencoding-flash-ovl 'face 'zencoding-preview-output)
(when (< 0 zencoding-insert-flash-time)
(run-with-idle-timer zencoding-insert-flash-time
nil 'zencoding-remove-flash-ovl (current-buffer)))))
;;;###autoload
(defun zencoding-preview (beg end)
"Expand zencode between BEG and END interactively.
This will show a preview of the expanded zen code and you can
accept it or skip it."
(interactive (if mark-active
(list (region-beginning) (region-end))
(list nil nil)))
(zencoding-preview-abort)
(if (not beg)
(message "Region not active")
(setq zencoding-old-show-paren show-paren-mode)
(show-paren-mode -1)
(let ((here (point)))
(goto-char beg)
(forward-line 1)
(unless (= 0 (current-column))
(insert "\n"))
(let* ((opos (point))
(ovli (make-overlay beg end nil nil t))
(ovlo (make-overlay opos opos))
(info (propertize " Zen preview. Choose with RET. Cancel by stepping out. \n"
'face 'tooltip)))
(overlay-put ovli 'face 'zencoding-preview-input)
(overlay-put ovli 'keymap zencoding-preview-keymap)
(overlay-put ovlo 'face 'zencoding-preview-output)
(overlay-put ovlo 'before-string info)
(setq zencoding-preview-input ovli)
(setq zencoding-preview-output ovlo)
(add-hook 'before-change-functions 'zencoding-preview-before-change t t)
(goto-char here)
(add-hook 'post-command-hook 'zencoding-preview-post-command t t)))))
(defvar zencoding-preview-pending-abort nil)
(make-variable-buffer-local 'zencoding-preview-pending-abort)
(defun zencoding-preview-before-change (beg end)
(when
(or (> beg (overlay-end zencoding-preview-input))
(< beg (overlay-start zencoding-preview-input))
(> end (overlay-end zencoding-preview-input))
(< end (overlay-start zencoding-preview-input)))
(setq zencoding-preview-pending-abort t)))
(defun zencoding-preview-abort ()
"Abort zen code preview."
(interactive)
(setq zencoding-preview-pending-abort nil)
(remove-hook 'before-change-functions 'zencoding-preview-before-change t)
(when (overlayp zencoding-preview-input)
(delete-overlay zencoding-preview-input))
(setq zencoding-preview-input nil)
(when (overlayp zencoding-preview-output)
(delete-overlay zencoding-preview-output))
(setq zencoding-preview-output nil)
(remove-hook 'post-command-hook 'zencoding-preview-post-command t)
(when zencoding-old-show-paren (show-paren-mode 1)))
(defun zencoding-preview-post-command ()
(condition-case err
(zencoding-preview-post-command-1)
(error (message "zencoding-preview-post: %s" err))))
(defun zencoding-preview-post-command-1 ()
(if (and (not zencoding-preview-pending-abort)
(<= (point) (overlay-end zencoding-preview-input))
(>= (point) (overlay-start zencoding-preview-input)))
(zencoding-update-preview (current-indentation))
(zencoding-preview-abort)))
(defun zencoding-preview-transformed (indent)
(let* ((string (buffer-substring-no-properties
(overlay-start zencoding-preview-input)
(overlay-end zencoding-preview-input))))
(let ((output (zencoding-transform string)))
(when output
(zencoding-prettify output indent)))))
(defun zencoding-update-preview (indent)
(let* ((pretty (zencoding-preview-transformed indent))
(show (when pretty
(propertize pretty 'face 'highlight))))
(when show
(overlay-put zencoding-preview-output 'after-string
(concat show "\n")))))
(provide 'zencoding-mode)
;;; zencoding-mode.el ends here
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