-;;; perl-mode.el --- Perl code editing commands for GNU Emacs
+;;; perl-mode.el --- Perl code editing commands for GNU Emacs -*- coding: utf-8 -*-
;; Copyright (C) 1990, 1994, 2001-2013 Free Software Foundation, Inc.
;;; Code:
-
-(defvar font-lock-comment-face)
-(defvar font-lock-doc-face)
-(defvar font-lock-string-face)
-
(defgroup perl nil
"Major mode for editing Perl code."
:link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
(defvar perl-mode-map
(let ((map (make-sparse-keymap)))
- (define-key map "{" 'perl-electric-terminator)
- (define-key map "}" 'perl-electric-terminator)
- (define-key map ";" 'perl-electric-terminator)
- (define-key map ":" 'perl-electric-terminator)
(define-key map "\e\C-a" 'perl-beginning-of-function)
(define-key map "\e\C-e" 'perl-end-of-function)
(define-key map "\e\C-h" 'perl-mark-function)
(define-key map "\e\C-q" 'perl-indent-exp)
(define-key map "\177" 'backward-delete-char-untabify)
- (define-key map "\t" 'perl-indent-command)
map)
"Keymap used in Perl mode.")
(defvar perl-imenu-generic-expression
'(;; Functions
- (nil "^sub\\s-+\\([-A-Za-z0-9+_:]+\\)" 1)
+ (nil "^[ \t]*sub\\s-+\\([-A-Za-z0-9+_:]+\\)" 1)
;;Variables
("Variables" "^\\(?:my\\|our\\)\\s-+\\([$@%][-A-Za-z0-9+_:]+\\)\\s-*=" 1)
- ("Packages" "^package\\s-+\\([-A-Za-z0-9+_:]+\\);" 1)
+ ("Packages" "^[ \t]*package\\s-+\\([-A-Za-z0-9+_:]+\\);" 1)
("Doc sections" "^=head[0-9][ \t]+\\(.*\\)" 1))
"Imenu generic expression for Perl mode. See `imenu-generic-expression'.")
;; Regexps updated with help from Tom Tromey <tromey@cambric.colorado.edu> and
;; Jim Campbell <jec@murzim.ca.boeing.com>.
+(defcustom perl-prettify-symbols t
+ "If non-nil, some symbols will be displayed using Unicode chars."
+ :type 'boolean)
+
+(defconst perl--prettify-symbols-alist
+ '(;;("andalso" . ?∧) ("orelse" . ?∨) ("as" . ?≡)("not" . ?¬)
+ ;;("div" . ?÷) ("*" . ?×) ("o" . ?○)
+ ("->" . ?→)
+ ("=>" . ?⇒)
+ ;;("<-" . ?←) ("<>" . ?≠) (">=" . ?≥) ("<=" . ?≤) ("..." . ?⋯)
+ ("::" . ?∷)
+ ))
+
+(defun perl--font-lock-compose-symbol ()
+ "Compose a sequence of ascii chars into a symbol.
+Regexp match data 0 points to the chars."
+ ;; Check that the chars should really be composed into a symbol.
+ (let* ((start (match-beginning 0))
+ (end (match-end 0))
+ (syntaxes (if (eq (char-syntax (char-after start)) ?w)
+ '(?w) '(?. ?\\))))
+ (if (or (memq (char-syntax (or (char-before start) ?\ )) syntaxes)
+ (memq (char-syntax (or (char-after end) ?\ )) syntaxes)
+ (nth 8 (syntax-ppss)))
+ ;; No composition for you. Let's actually remove any composition
+ ;; we may have added earlier and which is now incorrect.
+ (remove-text-properties start end '(composition))
+ ;; That's a symbol alright, so add the composition.
+ (compose-region start end (cdr (assoc (match-string 0)
+ perl--prettify-symbols-alist)))))
+ ;; Return nil because we're not adding any face property.
+ nil)
+
+(defun perl--font-lock-symbols-keywords ()
+ (when perl-prettify-symbols
+ `((,(regexp-opt (mapcar 'car perl--prettify-symbols-alist) t)
+ (0 (perl--font-lock-compose-symbol))))))
+
(defconst perl-font-lock-keywords-1
'(;; What is this for?
;;("\\(--- .* ---\\|=== .* ===\\)" . font-lock-string-face)
"Subdued level highlighting for Perl mode.")
(defconst perl-font-lock-keywords-2
- (append perl-font-lock-keywords-1
- (list
- ;;
- ;; Fontify keywords, except those fontified otherwise.
- (concat "\\<"
- (regexp-opt '("if" "until" "while" "elsif" "else" "unless"
- "do" "dump" "for" "foreach" "exit" "die"
- "BEGIN" "END" "return" "exec" "eval") t)
- "\\>")
- ;;
- ;; Fontify local and my keywords as types.
- '("\\<\\(local\\|my\\)\\>" . font-lock-type-face)
- ;;
- ;; Fontify function, variable and file name references.
- '("&\\(\\sw+\\(::\\sw+\\)*\\)" 1 font-lock-function-name-face)
- ;; Additionally underline non-scalar variables. Maybe this is a bad idea.
- ;;'("[$@%*][#{]?\\(\\sw+\\)" 1 font-lock-variable-name-face)
- '("[$*]{?\\(\\sw+\\(::\\sw+\\)*\\)" 1 font-lock-variable-name-face)
- '("\\([@%]\\|\\$#\\)\\(\\sw+\\(::\\sw+\\)*\\)"
+ (append
+ perl-font-lock-keywords-1
+ `( ;; Fontify keywords, except those fontified otherwise.
+ ,(concat "\\<"
+ (regexp-opt '("if" "until" "while" "elsif" "else" "unless"
+ "do" "dump" "for" "foreach" "exit" "die"
+ "BEGIN" "END" "return" "exec" "eval") t)
+ "\\>")
+ ;;
+ ;; Fontify local and my keywords as types.
+ ("\\<\\(local\\|my\\)\\>" . font-lock-type-face)
+ ;;
+ ;; Fontify function, variable and file name references.
+ ("&\\(\\sw+\\(::\\sw+\\)*\\)" 1 font-lock-function-name-face)
+ ;; Additionally underline non-scalar variables. Maybe this is a bad idea.
+ ;;'("[$@%*][#{]?\\(\\sw+\\)" 1 font-lock-variable-name-face)
+ ("[$*]{?\\(\\sw+\\(::\\sw+\\)*\\)" 1 font-lock-variable-name-face)
+ ("\\([@%]\\|\\$#\\)\\(\\sw+\\(::\\sw+\\)*\\)"
(2 (cons font-lock-variable-name-face '(underline))))
- '("<\\(\\sw+\\)>" 1 font-lock-constant-face)
- ;;
- ;; Fontify keywords with/and labels as we do in `c++-font-lock-keywords'.
- '("\\<\\(continue\\|goto\\|last\\|next\\|redo\\)\\>[ \t]*\\(\\sw+\\)?"
+ ("<\\(\\sw+\\)>" 1 font-lock-constant-face)
+ ;;
+ ;; Fontify keywords with/and labels as we do in `c++-font-lock-keywords'.
+ ("\\<\\(continue\\|goto\\|last\\|next\\|redo\\)\\>[ \t]*\\(\\sw+\\)?"
(1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
- '("^[ \t]*\\(\\sw+\\)[ \t]*:[^:]" 1 font-lock-constant-face)))
+ ("^[ \t]*\\(\\sw+\\)[ \t]*:[^:]" 1 font-lock-constant-face)
+ ,@(perl--font-lock-symbols-keywords)))
"Gaudy level highlighting for Perl mode.")
(defvar perl-font-lock-keywords perl-font-lock-keywords-1
(defun perl-outline-level ()
(cond
- ((looking-at "package\\s-") 0)
- ((looking-at "sub\\s-") 1)
+ ((looking-at "[ \t]*\\(package\\)\\s-")
+ (- (match-beginning 1) (match-beginning 0)))
+ ((looking-at "[ \t]*s\\(ub\\)\\s-")
+ (- (match-beginning 1) (match-beginning 0)))
((looking-at "=head[0-9]") (- (char-before (match-end 0)) ?0))
((looking-at "=cut") 1)
(t 3)))
+
+(defun perl-current-defun-name ()
+ "The `add-log-current-defun' function in Perl mode."
+ (save-excursion
+ (if (re-search-backward "^sub[ \t]+\\([^({ \t\n]+\\)" nil t)
+ (match-string-no-properties 1))))
+
\f
(defvar perl-mode-hook nil
"Normal hook to run when entering Perl mode.")
Turning on Perl mode runs the normal hook `perl-mode-hook'."
:abbrev-table perl-mode-abbrev-table
- (set (make-local-variable 'paragraph-start) (concat "$\\|" page-delimiter))
- (set (make-local-variable 'paragraph-separate) paragraph-start)
- (set (make-local-variable 'paragraph-ignore-fill-prefix) t)
- (set (make-local-variable 'indent-line-function) #'perl-indent-line)
- (set (make-local-variable 'comment-start) "# ")
- (set (make-local-variable 'comment-end) "")
- (set (make-local-variable 'comment-start-skip) "\\(^\\|\\s-\\);?#+ *")
- (set (make-local-variable 'comment-indent-function) #'perl-comment-indent)
- (set (make-local-variable 'parse-sexp-ignore-comments) t)
+ (setq-local paragraph-start (concat "$\\|" page-delimiter))
+ (setq-local paragraph-separate paragraph-start)
+ (setq-local paragraph-ignore-fill-prefix t)
+ (setq-local indent-line-function #'perl-indent-line)
+ (setq-local comment-start "# ")
+ (setq-local comment-end "")
+ (setq-local comment-start-skip "\\(^\\|\\s-\\);?#+ *")
+ (setq-local comment-indent-function #'perl-comment-indent)
+ (setq-local parse-sexp-ignore-comments t)
;; Tell font-lock.el how to handle Perl.
(setq font-lock-defaults '((perl-font-lock-keywords
perl-font-lock-keywords-1
nil nil ((?\_ . "w")) nil
(font-lock-syntactic-face-function
. perl-font-lock-syntactic-face-function)))
- (set (make-local-variable 'syntax-propertize-function)
- #'perl-syntax-propertize-function)
+ (setq-local syntax-propertize-function #'perl-syntax-propertize-function)
(add-hook 'syntax-propertize-extend-region-functions
#'syntax-propertize-multiline 'append 'local)
+ ;; Electricity.
+ ;; FIXME: setup electric-layout-rules.
+ (setq-local electric-indent-chars
+ (append '(?\{ ?\} ?\; ?\:) electric-indent-chars))
+ (add-hook 'electric-indent-functions #'perl-electric-noindent-p nil t)
;; Tell imenu how to handle Perl.
- (set (make-local-variable 'imenu-generic-expression)
- perl-imenu-generic-expression)
+ (setq-local imenu-generic-expression perl-imenu-generic-expression)
(setq imenu-case-fold-search nil)
;; Setup outline-minor-mode.
- (set (make-local-variable 'outline-regexp) perl-outline-regexp)
- (set (make-local-variable 'outline-level) 'perl-outline-level))
+ (setq-local outline-regexp perl-outline-regexp)
+ (setq-local outline-level 'perl-outline-level)
+ (setq-local add-log-current-defun-function #'perl-current-defun-name))
\f
;; This is used by indent-for-comment
;; to decide how much to indent a comment in Perl code
0 ;Existing comment at bol stays there.
comment-column))
-(defalias 'electric-perl-terminator 'perl-electric-terminator)
+(define-obsolete-function-alias 'electric-perl-terminator
+ 'perl-electric-terminator "22.1")
+(defun perl-electric-noindent-p (char)
+ (unless (eolp) 'no-indent))
+
(defun perl-electric-terminator (arg)
"Insert character and maybe adjust indentation.
If at end-of-line, and not in a comment or a quote, correct the indentation."
(perl-indent-line)
(delete-char -1))))
(self-insert-command (prefix-numeric-value arg)))
+(make-obsolete 'perl-electric-terminator 'electric-indent-mode "24.4")
;; not used anymore, but may be useful someday:
;;(defun perl-inside-parens-p ()
(t
(message "Use backslash to quote # characters.")
(ding t)))))))))
+(make-obsolete 'perl-indent-command 'indent-according-to-mode "24.4")
(defun perl-indent-line (&optional nochange parse-start)
"Indent current line as Perl code.