-;;; lazy-lock.el --- Lazy demand-driven fontification for fast Font Lock mode.
+;;; lazy-lock.el --- lazy demand-driven fontification for fast Font Lock mode
-;; Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1994, 1995, 1996, 1997, 1998, 2001
+;; Free Software Foundation, Inc.
;; Author: Simon Marshall <simon@gnu.org>
+;; Maintainer: FSF
;; Keywords: faces files
;; Version: 2.11
-;;; This file is part of GNU Emacs.
+;; 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
;; See also the fast-lock package. (But don't use them at the same time!)
;; Installation:
-;;
+;;
;; Put in your ~/.emacs:
;;
;; (setq font-lock-support-mode 'lazy-lock-mode)
(require 'font-lock)
-;; Make sure lazy-lock.el is supported.
-(if (if (save-match-data (string-match "Lucid\\|XEmacs" (emacs-version)))
- t
- (and (= emacs-major-version 19) (< emacs-minor-version 30)))
- (error "`lazy-lock' was written for Emacs 19.30 or later"))
-
(eval-when-compile
- ;;
- ;; We don't do this at the top-level as idle timers are not necessarily used.
- (require 'timer)
- ;; We don't do this at the top-level as we only use non-autoloaded macros.
- (require 'cl)
- ;;
- ;; We use this to preserve or protect things when modifying text properties.
- (defmacro save-buffer-state (varlist &rest body)
- "Bind variables according to VARLIST and eval BODY restoring buffer state."
- (` (let* ((,@ (append varlist
- '((modified (buffer-modified-p)) (buffer-undo-list t)
- (inhibit-read-only t) (inhibit-point-motion-hooks t)
- before-change-functions after-change-functions
- deactivate-mark buffer-file-name buffer-file-truename))))
- (,@ body)
- (when (and (not modified) (buffer-modified-p))
- (set-buffer-modified-p nil)))))
- (put 'save-buffer-state 'lisp-indent-function 1)
- ;;
- ;; We use this for clarity and speed. Naughty but nice.
- (defmacro do-while (test &rest body)
- "(do-while TEST BODY...): eval BODY... and repeat if TEST yields non-nil.
+ ;; We don't do this at the top-level as we only use non-autoloaded macros.
+ (require 'cl)
+ ;;
+ ;; We use this to preserve or protect things when modifying text properties.
+ (defmacro save-buffer-state (varlist &rest body)
+ "Bind variables according to VARLIST and eval BODY restoring buffer state."
+ `(let* (,@(append varlist
+ '((modified (buffer-modified-p))
+ (buffer-undo-list t)
+ (inhibit-read-only t)
+ (inhibit-point-motion-hooks t)
+ (inhibit-modification-hooks t)
+ deactivate-mark
+ buffer-file-name
+ buffer-file-truename)))
+ ,@body
+ (when (and (not modified) (buffer-modified-p))
+ (restore-buffer-modified-p nil))))
+ (put 'save-buffer-state 'lisp-indent-function 1)
+ ;;
+ ;; We use this for clarity and speed. Naughty but nice.
+ (defmacro do-while (test &rest body)
+ "(do-while TEST BODY...): eval BODY... and repeat if TEST yields non-nil.
The order of execution is thus BODY, TEST, BODY, TEST and so on
until TEST returns nil."
- (` (while (progn (,@ body) (, test)))))
- (put 'do-while 'lisp-indent-function (get 'while 'lisp-indent-function))
- ;;
- ;; We use this for clarity and speed. Borrowed from a future Emacs.
- (or (fboundp 'with-current-buffer)
- (defmacro with-current-buffer (buffer &rest body)
- "Execute the forms in BODY with BUFFER as the current buffer.
-The value returned is the value of the last form in BODY."
- (` (save-excursion (set-buffer (, buffer)) (,@ body)))))
- (put 'with-current-buffer 'lisp-indent-function 1)
- ;;
- ;; We use this for compatibility with a future Emacs.
- (or (fboundp 'with-temp-message)
- (defmacro with-temp-message (message &rest body)
- (` (let ((temp-message (, message)) current-message)
- (unwind-protect
- (progn
- (when temp-message
- (setq current-message (current-message))
- (message temp-message))
- (,@ body))
- (when temp-message
- (message current-message)))))))
- ;;
- ;; We use this for compatibility with a future Emacs.
- (or (fboundp 'defcustom)
- (defmacro defcustom (symbol value doc &rest args)
- (` (defvar (, symbol) (, value) (, doc))))))
-
-;(defun lazy-lock-submit-bug-report ()
-; "Submit via mail a bug report on lazy-lock.el."
-; (interactive)
-; (let ((reporter-prompt-for-summary-p t))
-; (reporter-submit-bug-report "simon@gnu.ai.mit.edu" "lazy-lock 2.11"
-; '(lazy-lock-minimum-size lazy-lock-defer-on-the-fly
-; lazy-lock-defer-on-scrolling lazy-lock-defer-contextually
-; lazy-lock-defer-time lazy-lock-stealth-time
-; lazy-lock-stealth-load lazy-lock-stealth-nice lazy-lock-stealth-lines
-; lazy-lock-stealth-verbose)
-; nil nil
-; (concat "Hi Si.,
-;
-;I want to report a bug. I've read the `Bugs' section of `Info' on Emacs, so I
-;know how to make a clear and unambiguous report. To reproduce the bug:
-;
-;Start a fresh editor via `" invocation-name " -no-init-file -no-site-file'.
-;In the `*scratch*' buffer, evaluate:"))))
+ `(while (progn ,@body ,test)))
+ (put 'do-while 'lisp-indent-function (get 'while 'lisp-indent-function)))
(defvar lazy-lock-mode nil) ; Whether we are turned on.
(defvar lazy-lock-buffers nil) ; For deferral.
taking longer to fontify, you could increase the value of this variable.
See also `lazy-lock-stealth-load'."
:type '(choice (const :tag "never" nil)
- (number :tag "seconds"))
+ (number :tag "seconds"))
:group 'lazy-lock)
(defcustom lazy-lock-stealth-verbose
(setq font-lock-support-mode 'lazy-lock-mode)
+For a newer font-lock support mode with similar functionality, see
+`jit-lock-mode'. Eventually, Lazy Lock mode will be deprecated in
+JIT Lock's favor.
+
When Lazy Lock mode is enabled, fontification can be lazy in a number of ways:
- Demand-driven buffer fontification if `lazy-lock-minimum-size' is non-nil.
;;
;; Add hook if lazy-lock.el is fontifying on scrolling or is deferring.
(when (or fontifying defer-change defer-scroll defer-context)
- (make-local-hook 'window-scroll-functions)
(add-hook 'window-scroll-functions (if defer-scroll
'lazy-lock-defer-after-scroll
'lazy-lock-fontify-after-scroll)
;;
;; Add hook if lazy-lock.el is fontifying and is not deferring changes.
(when (and fontifying (not defer-change) (not defer-context))
- (make-local-hook 'before-change-functions)
(add-hook 'before-change-functions 'lazy-lock-arrange-before-change nil t))
;;
;; Replace Font Lock mode hook.
nil t)
;;
;; Add package-specific hook.
- (make-local-hook 'outline-view-change-hook)
(add-hook 'outline-view-change-hook 'lazy-lock-fontify-after-visage nil t)
- (make-local-hook 'hs-hide-hook)
(add-hook 'hs-hide-hook 'lazy-lock-fontify-after-visage nil t))
(defun lazy-lock-install-timers (dtime stime)
(lazy-lock-percent-fontified) (buffer-name))
(message "Fontifying stealthily...")
(setq message t)))
+ ;; Current buffer may have changed during `sit-for'.
+ (set-buffer (car buffers))
(lazy-lock-fontify-chunk)
(setq continue (sit-for (or lazy-lock-stealth-nice 0)))))))
(setq buffers (cdr buffers)))))))
;; should use this function. For an example, see ps-print.el.
(defun lazy-lock-fontify-region (beg end)
;; Fontify between BEG and END, where necessary, in the current buffer.
- (when (setq beg (text-property-any beg end 'lazy-lock nil))
- (save-excursion
- (save-match-data
- (save-buffer-state
- ;; Ensure syntactic fontification is always correct.
- (font-lock-beginning-of-syntax-function next)
- ;; Find successive unfontified regions between BEG and END.
- (condition-case data
- (do-while beg
- (setq next (or (text-property-any beg end 'lazy-lock t) end))
- ;; Make sure the region end points are at beginning of line.
- (goto-char beg)
- (unless (bolp)
- (beginning-of-line)
- (setq beg (point)))
- (goto-char next)
- (unless (bolp)
- (forward-line)
- (setq next (point)))
- ;; Fontify the region, then flag it as fontified.
- (font-lock-fontify-region beg next)
- (add-text-properties beg next '(lazy-lock t))
- (setq beg (text-property-any next end 'lazy-lock nil)))
- ((error quit) (message "Fontifying region...%s" data))))))))
+ (save-restriction
+ (widen)
+ (when (setq beg (text-property-any beg end 'lazy-lock nil))
+ (save-excursion
+ (save-match-data
+ (save-buffer-state
+ ;; Ensure syntactic fontification is always correct.
+ (font-lock-beginning-of-syntax-function next)
+ ;; Find successive unfontified regions between BEG and END.
+ (condition-case data
+ (do-while beg
+ (setq next (or (text-property-any beg end 'lazy-lock t) end))
+ ;; Make sure the region end points are at beginning of line.
+ (goto-char beg)
+ (unless (bolp)
+ (beginning-of-line)
+ (setq beg (point)))
+ (goto-char next)
+ (unless (bolp)
+ (forward-line)
+ (setq next (point)))
+ ;; Fontify the region, then flag it as fontified.
+ (font-lock-fontify-region beg next)
+ (add-text-properties beg next '(lazy-lock t))
+ (setq beg (text-property-any next end 'lazy-lock nil)))
+ ((error quit) (message "Fontifying region...%s" data)))))))))
(defun lazy-lock-fontify-chunk ()
;; Fontify the nearest chunk, for stealth, in the current buffer.
\f
;; Version dependent workarounds and fixes.
-(when (if (save-match-data (string-match "Lucid\\|XEmacs" (emacs-version)))
- nil
- (and (= emacs-major-version 19) (= emacs-minor-version 30)))
- ;;
- ;; We use `post-command-idle-hook' for deferral and stealth. Oh Lordy.
- (defun lazy-lock-install-timers (foo bar)
- (add-hook 'post-command-idle-hook 'lazy-lock-fontify-post-command t)
- (add-hook 'post-command-idle-hook 'lazy-lock-fontify-post-idle t)
- (add-to-list 'lazy-lock-install (current-buffer))
- (add-hook 'post-command-hook 'lazy-lock-fontify-after-install))
- (defun lazy-lock-fontify-post-command ()
- (and lazy-lock-buffers (not executing-kbd-macro)
- (progn
- (and deactivate-mark (deactivate-mark))
- (sit-for
- (or (cdr-safe lazy-lock-defer-time) lazy-lock-defer-time 0)))
- (lazy-lock-fontify-after-defer)))
- (defun lazy-lock-fontify-post-idle ()
- (and lazy-lock-stealth-time (not executing-kbd-macro)
- (not (window-minibuffer-p (selected-window)))
- (progn
- (and deactivate-mark (deactivate-mark))
- (sit-for lazy-lock-stealth-time))
- (lazy-lock-fontify-after-idle)))
- ;;
- ;; Simulate running of `window-scroll-functions' in `set-window-buffer'.
- (defvar lazy-lock-install nil)
- (defun lazy-lock-fontify-after-install ()
- (remove-hook 'post-command-hook 'lazy-lock-fontify-after-install)
- (while lazy-lock-install
- (mapcar 'lazy-lock-fontify-conservatively
- (get-buffer-window-list (pop lazy-lock-install) 'nomini t)))))
-
-(when (if (save-match-data (string-match "Lucid\\|XEmacs" (emacs-version)))
- nil
- (or (and (= emacs-major-version 20) (< emacs-minor-version 4))
- (= emacs-major-version 19)))
- ;;
- ;; We use `vertical-motion' rather than `window-end' UPDATE arg.
- (defun lazy-lock-fontify-after-scroll (window window-start)
- ;; Called from `window-scroll-functions'.
- ;; Fontify WINDOW from WINDOW-START following the scroll. We cannot use
- ;; `window-end' so we work out what it would be via `vertical-motion'.
- (let ((inhibit-point-motion-hooks t))
- (save-excursion
- (goto-char window-start)
- (vertical-motion (window-height window) window)
- (lazy-lock-fontify-region window-start (point))))
- (set-window-redisplay-end-trigger window nil))
- (defun lazy-lock-fontify-after-trigger (window trigger-point)
- ;; Called from `redisplay-end-trigger-functions'.
- ;; Fontify WINDOW from TRIGGER-POINT following the redisplay. We cannot
- ;; use `window-end' so we work out what it would be via `vertical-motion'.
- (let ((inhibit-point-motion-hooks t))
- (save-excursion
- (goto-char (window-start window))
- (vertical-motion (window-height window) window)
- (lazy-lock-fontify-region trigger-point (point))))))
-
(when (consp lazy-lock-defer-time)
;;
;; In 2.06.04 and below, `lazy-lock-defer-time' could specify modes and time.
(princ " or change your ~/.emacs now."))
(setq lazy-lock-defer-on-scrolling lazy-lock-defer-driven))
\f
-;; Possibly absent.
-
-(unless (boundp 'font-lock-inhibit-thing-lock)
- ;; Font Lock mode uses this to direct Lazy and Fast Lock modes to stay off.
- (defvar font-lock-inhibit-thing-lock nil
- "List of Font Lock mode related modes that should not be turned on."))
-
-(unless (fboundp 'font-lock-value-in-major-mode)
- (defun font-lock-value-in-major-mode (alist)
- ;; Return value in ALIST for `major-mode'.
- (if (consp alist)
- (cdr (or (assq major-mode alist) (assq t alist)))
- alist)))
-
-(unless (fboundp 'buffer-live-p)
- ;; We use this to check that a buffer we have to fontify still exists.
- (defun buffer-live-p (object)
- "Return non-nil if OBJECT is an editor buffer that has not been deleted."
- (and (bufferp object) (buffer-name object))))
-
-(unless (fboundp 'get-buffer-window-list)
- ;; We use this to get all windows showing a buffer we have to fontify.
- (defun get-buffer-window-list (buffer &optional minibuf frame)
- "Return windows currently displaying BUFFER, or nil if none."
- (let ((buffer (if (bufferp buffer) buffer (get-buffer buffer))) windows)
- (walk-windows (function (lambda (window)
- (when (eq (window-buffer window) buffer)
- (push window windows))))
- minibuf frame)
- windows)))
-
-(unless (fboundp 'current-message)
- (defun current-message ()
- ""))
-\f
;; Install ourselves:
(add-hook 'window-size-change-functions 'lazy-lock-fontify-after-resize)
(provide 'lazy-lock)
+;;; arch-tag: c1776846-f046-4a45-9684-54b951b12fc9
;;; lazy-lock.el ends here
HCoop / bpt / emacs.git / blobdiff