;; Author: Rob Riepel <riepel@networking.stanford.edu>
;; Maintainer: Rob Riepel <riepel@networking.stanford.edu>
;; Keywords: emulations
+;; Package: tpu-edt
;; This file is part of GNU Emacs.
;;; Movement by paragraph
+;; Cf edt-with-position.
+(defmacro tpu-with-position (&rest body)
+ "Execute BODY with some position-related variables bound."
+ `(let* ((left nil)
+ (beg (tpu-current-line))
+ (height (window-height))
+ (top-percent
+ (if (zerop tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
+ (bottom-percent
+ (if (zerop tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
+ (top-margin (/ (* height top-percent) 100))
+ (bottom-up-margin (1+ (/ (* height bottom-percent) 100)))
+ (bottom-margin (max beg (- height bottom-up-margin 1)))
+ (top (save-excursion (move-to-window-line top-margin) (point)))
+ (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
+ (far (save-excursion
+ (goto-char bottom)
+ (point-at-bol (1- height)))))
+ ,@body))
+
(defun tpu-paragraph (num)
"Move to the next paragraph in the current direction.
A repeat count means move that many paragraphs."
(interactive "p")
- (let* ((left nil)
- (beg (tpu-current-line))
- (height (window-height))
- (top-percent
- (if (= 0 tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
- (bottom-percent
- (if (= 0 tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
- (top-margin (/ (* height top-percent) 100))
- (bottom-up-margin (+ 1 (/ (* height bottom-percent) 100)))
- (bottom-margin (max beg (- height bottom-up-margin 1)))
- (top (save-excursion (move-to-window-line top-margin) (point)))
- (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
- (far (save-excursion
- (goto-char bottom) (forward-line (- height 2)) (point))))
- (cond (tpu-advance
- (tpu-next-paragraph num)
- (cond((> (point) far)
- (setq left (save-excursion (forward-line height)))
- (if (= 0 left) (recenter top-margin)
- (recenter (- left bottom-up-margin))))
- (t
- (and (> (point) bottom) (recenter bottom-margin)))))
- (t
- (tpu-previous-paragraph num)
- (and (< (point) top) (recenter (min beg top-margin)))))))
-
+ (tpu-with-position
+ (if tpu-advance
+ (progn
+ (tpu-next-paragraph num)
+ (if (> (point) far)
+ (if (zerop (setq left (save-excursion (forward-line height))))
+ (recenter top-margin)
+ (recenter (- left bottom-up-margin)))
+ (and (> (point) bottom) (recenter bottom-margin))))
+ (tpu-previous-paragraph num)
+ (and (< (point) top) (recenter (min beg top-margin))))))
;;; Movement by page
"Move to the next page in the current direction.
A repeat count means move that many pages."
(interactive "p")
- (let* ((left nil)
- (beg (tpu-current-line))
- (height (window-height))
- (top-percent
- (if (= 0 tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
- (bottom-percent
- (if (= 0 tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
- (top-margin (/ (* height top-percent) 100))
- (bottom-up-margin (+ 1 (/ (* height bottom-percent) 100)))
- (bottom-margin (max beg (- height bottom-up-margin 1)))
- (top (save-excursion (move-to-window-line top-margin) (point)))
- (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
- (far (save-excursion
- (goto-char bottom) (forward-line (- height 2)) (point))))
- (cond (tpu-advance
- (forward-page num)
- (cond((> (point) far)
- (setq left (save-excursion (forward-line height)))
- (if (= 0 left) (recenter top-margin)
- (recenter (- left bottom-up-margin))))
- (t
- (and (> (point) bottom) (recenter bottom-margin)))))
- (t
- (backward-page num)
- (and (< (point) top) (recenter (min beg top-margin)))))))
-
+ (tpu-with-position
+ (if tpu-advance
+ (progn
+ (forward-page num)
+ (if (> (point) far)
+ (if (zerop (setq left (save-excursion (forward-line height))))
+ (recenter top-margin)
+ (recenter (- left bottom-up-margin)))
+ (and (> (point) bottom) (recenter bottom-margin))))
+ (backward-page num)
+ (and (< (point) top) (recenter (min beg top-margin))))))
;;; Scrolling
(defun tpu-search-internal (pat &optional quiet)
"Search for a string or regular expression."
- (let* ((left nil)
- (beg (tpu-current-line))
- (height (window-height))
- (top-percent
- (if (= 0 tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
- (bottom-percent
- (if (= 0 tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
- (top-margin (/ (* height top-percent) 100))
- (bottom-up-margin (+ 1 (/ (* height bottom-percent) 100)))
- (bottom-margin (max beg (- height bottom-up-margin 1)))
- (top (save-excursion (move-to-window-line top-margin) (point)))
- (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
- (far (save-excursion
- (goto-char bottom) (forward-line (- height 2)) (point))))
- (tpu-search-internal-core pat quiet)
- (if tpu-searching-forward
- (cond((> (point) far)
- (setq left (save-excursion (forward-line height)))
- (if (= 0 left) (recenter top-margin)
- (recenter (- left bottom-up-margin))))
- (t
- (and (> (point) bottom) (recenter bottom-margin))))
- (and (< (point) top) (recenter (min beg top-margin))))))
-
-
+ (tpu-with-position
+ (tpu-search-internal-core pat quiet)
+ (if tpu-searching-forward
+ (progn
+ (if (> (point) far)
+ (if (zerop (setq left (save-excursion (forward-line height))))
+ (recenter top-margin)
+ (recenter (- left bottom-up-margin)))
+ (and (> (point) bottom) (recenter bottom-margin))))
+ (and (< (point) top) (recenter (min beg top-margin))))))
;; Advise the newline, newline-and-indent, and do-auto-fill functions.
(defadvice newline (around tpu-respect-bottom-scroll-margin activate disable)
;; generated-autoload-file: "tpu-edt.el"
;; End:
-;; arch-tag: 89676fa4-33ec-48cb-9135-6f3bf230ab1a
;;; tpu-extras.el ends here