diff options
Diffstat (limited to 'lisp/emulation/tpu-extras.el')
| -rw-r--r-- | lisp/emulation/tpu-extras.el | 70 |
1 files changed, 27 insertions, 43 deletions
diff --git a/lisp/emulation/tpu-extras.el b/lisp/emulation/tpu-extras.el index 019896c0eb2..609ce2e203b 100644 --- a/lisp/emulation/tpu-extras.el +++ b/lisp/emulation/tpu-extras.el @@ -141,13 +141,11 @@ the previous line when starting from a line beginning." (add-hook 'picture-mode-hook 'tpu-set-cursor-free) -(defun tpu-write-file-hook nil +(defun tpu-before-save-hook () "Eliminate whitespace at ends of lines, if the cursor is free." (if (and (buffer-modified-p) tpu-cursor-free) (tpu-trim-line-ends))) -(or (memq 'tpu-write-file-hook write-file-functions) - (setq write-file-functions - (cons 'tpu-write-file-hook write-file-functions))) +(add-hook 'before-save-hook 'tpu-before-save-hook) ;;; Utility routines for implementing scroll margins @@ -246,7 +244,7 @@ Accepts a prefix argument for the number of lines to move." (end-of-line (- 1 num)))) (tpu-top-check beg num))) -(defun tpu-current-end-of-line nil +(defun tpu-current-end-of-line () "Move point to end of current line." (interactive) (let ((beg (point))) @@ -392,41 +390,24 @@ A repeat count means scroll that many sections." -;;; Replace the newline, newline-and-indent, and do-auto-fill functions - -(or (fboundp 'tpu-old-newline) - (fset 'tpu-old-newline (symbol-function 'newline))) -(or (fboundp 'tpu-old-do-auto-fill) - (fset 'tpu-old-do-auto-fill (symbol-function 'do-auto-fill))) -(or (fboundp 'tpu-old-newline-and-indent) - (fset 'tpu-old-newline-and-indent (symbol-function 'newline-and-indent))) - -(defun newline (&optional num) - "Insert a newline. With arg, insert that many newlines. -In Auto Fill mode, can break the preceding line if no numeric arg. -This is the TPU-edt version that respects the bottom scroll margin." - (interactive "p") - (let ((beg (tpu-current-line))) - (or num (setq num 1)) - (tpu-old-newline num) +;; Advise the newline, newline-and-indent, and do-auto-fill functions. +(defadvice newline (around tpu-respect-bottom-scroll-margin activate disable) + "Respect `tpu-bottom-scroll-margin'." + (let ((beg (tpu-current-line)) + (num (prefix-numeric-value (ad-get-arg 0)))) + ad-do-it (tpu-bottom-check beg num))) -(defun newline-and-indent nil - "Insert a newline, then indent according to major mode. -Indentation is done using the current indent-line-function. -In programming language modes, this is the same as TAB. -In some text modes, where TAB inserts a tab, this indents -to the specified left-margin column. This is the TPU-edt -version that respects the bottom scroll margin." - (interactive) +(defadvice newline-and-indent (around tpu-respect-bottom-scroll-margin) + "Respect `tpu-bottom-scroll-margin'." (let ((beg (tpu-current-line))) - (tpu-old-newline-and-indent) + ad-do-it (tpu-bottom-check beg 1))) -(defun do-auto-fill nil - "TPU-edt version that respects the bottom scroll margin." +(defadvice do-auto-fill (around tpu-respect-bottom-scroll-margin) + "Respect `tpu-bottom-scroll-margin'." (let ((beg (tpu-current-line))) - (tpu-old-do-auto-fill) + ad-do-it (tpu-bottom-check beg 1))) @@ -440,18 +421,21 @@ version that respects the bottom scroll margin." \nsEnter bottom scroll margin (N lines or N%% or RETURN for current value): ") ;; set top scroll margin (or (string= top "") - (if (string= "%" (substring top -1)) - (setq tpu-top-scroll-margin (string-to-number top)) - (setq tpu-top-scroll-margin + (setq tpu-top-scroll-margin + (if (string= "%" (substring top -1)) + (string-to-number top) (/ (1- (+ (* (string-to-number top) 100) (window-height))) (window-height))))) ;; set bottom scroll margin (or (string= bottom "") - (if (string= "%" (substring bottom -1)) - (setq tpu-bottom-scroll-margin (string-to-number bottom)) - (setq tpu-bottom-scroll-margin + (setq tpu-bottom-scroll-margin + (if (string= "%" (substring bottom -1)) + (string-to-number bottom) (/ (1- (+ (* (string-to-number bottom) 100) (window-height))) (window-height))))) + (dolist (f '(newline newline-and-indent do-auto-fill)) + (ad-enable-advice f 'around 'tpu-respect-bottom-scroll-margin) + (ad-activate f)) ;; report scroll margin settings if running interactively (and (interactive-p) (message "Scroll margins set. Top = %s%%, Bottom = %s%%" @@ -461,7 +445,7 @@ version that respects the bottom scroll margin." ;;; Functions to set cursor bound or free ;;;###autoload -(defun tpu-set-cursor-free nil +(defun tpu-set-cursor-free () "Allow the cursor to move freely about the screen." (interactive) (setq tpu-cursor-free t) @@ -471,7 +455,7 @@ version that respects the bottom scroll margin." (message "The cursor will now move freely about the screen.")) ;;;###autoload -(defun tpu-set-cursor-bound nil +(defun tpu-set-cursor-bound () "Constrain the cursor to the flow of the text." (interactive) (tpu-trim-line-ends) @@ -481,5 +465,5 @@ version that respects the bottom scroll margin." GOLD-map) (message "The cursor is now bound to the flow of your text.")) -;;; arch-tag: 89676fa4-33ec-48cb-9135-6f3bf230ab1a +;; arch-tag: 89676fa4-33ec-48cb-9135-6f3bf230ab1a ;;; tpu-extras.el ends here |