慣性スクロールっぽい何か for #xyzzy
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;;; -*- mode:lisp; package:smooth -*- | |
;;; 慣性スクロールっぽい何か for xyzzy | |
;;; 設定 | |
;; (require "smooth") | |
;; (global-set-key #\C-\, 'smooth:scroll-forward) | |
;; (global-set-key #\C-. 'smooth:scroll-backward) | |
(provide "smooth") | |
(defpackage :smooth | |
(:use :lisp :editor)) | |
(in-package :smooth) | |
(export '(*counter-max* *counter-dec* *max-speed* | |
scroll-forward scroll-backward | |
auto-scroll-forward auto-scroll-backward | |
)) | |
(defparameter *counter-max* 50) | |
(defparameter *counter-dec* 2) | |
(defparameter *max-speed* 2) | |
(defvar *counter* 0) | |
(defun start-scrolling (win dir) | |
(let ((com *this-command*) | |
(buf (window-buffer win)) | |
(row (get-window-line)) | |
(dec *counter-dec*)) | |
(labels ((scroll () | |
(when (and (eq *last-command* com) | |
(eq (selected-window) win) | |
(not (deleted-buffer-p buf)) | |
(eq buf (selected-buffer))) | |
(let ((d (min (ceiling *counter* 10) *max-speed*))) | |
(unless (next-line (* dir d)) | |
(setq *counter* 0))) | |
(recenter row) | |
(refresh-screen) | |
(if (> (decf *counter* dec) 2) | |
(start-timer (/ 1.0 *counter*) #'scroll t) | |
(setq *counter* 0))))) | |
(stop-timer #'scroll) | |
(setq *counter* *counter-max* | |
*last-command* com) | |
(scroll)))) | |
(defun scroll-forward () | |
(interactive) | |
(start-scrolling (selected-window) 1)) | |
(defun scroll-backward () | |
(interactive) | |
(start-scrolling (selected-window) -1)) | |
(defun auto-scroll-forward (&optional (speed 3)) | |
(interactive "p") | |
(setq speed (min (max speed 1) 5)) | |
(let ((*counter-max* (* speed 10)) | |
(*counter-dec* 0) | |
(*max-speed* speed)) | |
(start-scrolling (selected-window) 1))) | |
(defun auto-scroll-backward (&optional (speed 3)) | |
(interactive "p") | |
(setq speed (min (max speed 1) 5)) | |
(let ((*counter-max* (* speed 10)) | |
(*counter-dec* 0) | |
(*max-speed* speed)) | |
(start-scrolling (selected-window) -1))) |
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