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Scroll mode for touchpad/mouse without/missing scroll/middle button

Enable scroll mode for touchpad/mouse without/missing scroll/middle button when Ctrl + Space or Ctrl + Shift and touchpad/left touchpad button/left mouse button are pressed. Text selection is enabled for Ctrl + Shift.

当前为 2024-07-26 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Scroll mode for touchpad/mouse without/missing scroll/middle button
  3. // @author       NWP
  4. // @description  Enable scroll mode for touchpad/mouse without/missing scroll/middle button when Ctrl + Space or Ctrl + Shift and touchpad/left touchpad button/left mouse button are pressed. Text selection is enabled for Ctrl + Shift.
  5. // @namespace    https://greasyfork.org/users/877912
  6. // @version      0.1
  7. // @license      MIT
  8. // @match        *://*/*
  9. // @grant        none
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.     'use strict';
  14.  
  15.     // Sensitivity factor determines the scroll speed relative to mouse movement.
  16.     // A higher value results in faster scrolling, while a lower value makes the scrolling slower.
  17.     // Example:
  18.     // - If sensitivity = 1.0, moving the mouse 100 pixels will scroll 100 pixels.
  19.     // - If sensitivity = 0.5, moving the mouse 100 pixels will scroll 50 pixels.
  20.     const sensitivity = 0.5;
  21.  
  22.  
  23.     let scrollModeEnabled = false;
  24.     let selectModeEnabled = false;
  25.     let initialMouseY = 0;
  26.     let scrollSpeed = 0;
  27.     let scrollInterval = null;
  28.  
  29.     document.addEventListener('keydown', function(event) {
  30.         if (event.ctrlKey && event.code === 'Space' && !scrollModeEnabled) {
  31.             scrollModeEnabled = true;
  32.             document.body.style.cursor = 'ns-resize'; // Indicate scroll mode is active
  33.             disableTextSelection();
  34.         }
  35.         if (event.ctrlKey && event.shiftKey && !selectModeEnabled) {
  36.             selectModeEnabled = true;
  37.             document.body.style.cursor = 'ns-resize'; // Indicate select mode is active
  38.             enableTextSelection();
  39.         }
  40.     });
  41.  
  42.     document.addEventListener('keyup', function(event) {
  43.         // Check specific keyup events to exit scroll mode
  44.         if (event.code === 'Space' || event.code === 'ControlLeft' || event.code === 'ControlRight') {
  45.             exitScrollMode();
  46.         }
  47.         // Check specific keyup events to exit select mode
  48.         if (event.code === 'ShiftLeft' || event.code === 'ShiftRight' || event.code === 'ControlLeft' || event.code === 'ControlRight') {
  49.             exitSelectMode();
  50.         }
  51.     });
  52.  
  53.     document.addEventListener('mousedown', function(event) {
  54.         if (scrollModeEnabled && event.button === 0) {
  55.             initialMouseY = event.clientY; // Set initial position for scroll calculation
  56.             startAutoScroll();
  57.         }
  58.         if (selectModeEnabled && event.button === 0) {
  59.             initialMouseY = event.clientY; // Set initial position for scroll calculation
  60.             startAutoScroll();
  61.         }
  62.     });
  63.  
  64.     document.addEventListener('mouseup', function(event) {
  65.         if (event.button === 0) {
  66.             exitScrollMode();
  67.             exitSelectMode();
  68.         }
  69.     });
  70.  
  71.     document.addEventListener('mousemove', function(event) {
  72.         if ((scrollModeEnabled || selectModeEnabled) && scrollInterval) {
  73.             let currentMouseY = event.clientY;
  74.             scrollSpeed = (currentMouseY - initialMouseY) * sensitivity;
  75.         }
  76.     });
  77.  
  78.     function startAutoScroll() {
  79.         if (!scrollInterval) {
  80.             scrollInterval = setInterval(function() {
  81.                 window.scrollBy(0, scrollSpeed); // Scroll based on current calculated speed
  82.             }, 50);
  83.         }
  84.     }
  85.  
  86.     function stopAutoScroll() {
  87.         if (scrollInterval) {
  88.             clearInterval(scrollInterval);
  89.             scrollInterval = null;
  90.         }
  91.     }
  92.  
  93.     function exitScrollMode() {
  94.         if (scrollModeEnabled) {
  95.             scrollModeEnabled = false;
  96.             scrollSpeed = 0;
  97.             document.body.style.cursor = 'default';
  98.             enableTextSelection(); // Ensure text selection is enabled again
  99.             stopAutoScroll();
  100.         }
  101.     }
  102.  
  103.     function exitSelectMode() {
  104.         if (selectModeEnabled) {
  105.             selectModeEnabled = false;
  106.             scrollSpeed = 0;
  107.             document.body.style.cursor = 'default';
  108.             stopAutoScroll();
  109.         }
  110.     }
  111.  
  112.     function disableTextSelection() {
  113.         document.body.style.userSelect = 'none';
  114.         document.body.style.webkitUserSelect = 'none';
  115.         document.body.style.msUserSelect = 'none';
  116.         document.body.style.mozUserSelect = 'none';
  117.     }
  118.  
  119.     function enableTextSelection() {
  120.         document.body.style.userSelect = '';
  121.         document.body.style.webkitUserSelect = '';
  122.         document.body.style.msUserSelect = '';
  123.         document.body.style.mozUserSelect = '';
  124.     }
  125. })();