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Add Keyboard Shortcut for Generic Next/Previous Page

Add CTRL+ArrowLeft and CTRL+ArrowRight for generic next/previous page. It will click the last found link/button whose text contain ">"/"»", "<"/"«", "Next", "Prev"/"Previous", or "Back".

  1. // ==UserScript==
  2. // @name        Add Keyboard Shortcut for Generic Next/Previous Page
  3. // @namespace   AddKeyboardShortcutForGenericNextPreviousPage
  4. // @version     1.0.22
  5. // @license     GNU AGPLv3
  6. // @author      jcunews
  7. // @description Add CTRL+ArrowLeft and CTRL+ArrowRight for generic next/previous page. It will click the last found link/button whose text contain ">"/"»", "<"/"«", "Next", "Prev"/"Previous", or "Back".
  8. // @website     https://gf.qytechs.cn/en/users/85671-jcunews
  9. // @include     *://*/*
  10. // @include     *:*
  11. // @grant       none
  12. // ==/UserScript==
  13.  
  14. /*
  15. The link/button text more specifically, are those which contain (non case sesitive) "Next", "Prev", "Previous";
  16. or has ">"/"<" (and similar meaning characters); or "«"/"»". The ID and class names are also checked. "«"/"»" have lower priority over the rest conditions.
  17.  
  18. This script doesn't take into account of links whose contents is an image rather than text, or whose text is a CSS text contents.
  19.  
  20. If next/previous navigation link is specified in the HTML metadata, it will be used as a priority.
  21. */
  22.  
  23. (function(rxPrev, rxPrev2, rxNext, rxNext2, ts) {
  24.   rxPrev = /<|\u2039|(\b|_)(?:back|prev(ious)?)(\b|_)/i;
  25.   rxPrev2 = /\u00ab/i;
  26.   rxNext = />|\u203a|(\b|_)next(\b|_)/i;
  27.   rxNext2 = /\u00bb/i;
  28.   rxCarousel = /carousel/i;
  29.  
  30.   addEventListener("keydown", function(ev, e, a) {
  31.  
  32.     function clickLink(rx, e, i, l, r) {
  33.       e = document.querySelectorAll('a,button,input[type="button"],input[type="submit"]');
  34.       for (i = e.length - 1; i >= 0; i--) {
  35.         if (
  36.           (
  37.             ((e[i].tagName === "A") && rx.test(e[i].rel)) ||
  38.             ((e[i].tagName === "A") && Array.from(e[i].classList).some(cl => rx.test(cl))) ||
  39.             ((e[i].tagName === "INPUT") && rx.test(e[i].value)) ||
  40.             rx.test(e[i].textContent) ||
  41.             (e[i].id && rx.test(e[i].id)) ||
  42.             Array.from(e[i].classList).some(s => rx.test(s))
  43.           ) && (!rxCarousel.test(e[i].className))
  44.         ) {
  45.           ev.stopImmediatePropagation();
  46.           ev.stopPropagation();
  47.           ev.preventDefault();
  48.           e[i].click();
  49.           return true
  50.         }
  51.       }
  52.       return false
  53.     }
  54.  
  55.     if (ev.ctrlKey && !ev.altKey && !ev.shiftKey) {
  56.       a = document.activeElement;
  57.       while (a && a.shadowRoot?.activeElement) a = a.shadowRoot.activeElement;
  58.       if (a && ((/^(INPUT|TEXTAREA)$/).test(a.tagName) || a.isContentEditable)) return;
  59.       switch (ev.key) {
  60.         case "ArrowLeft": //previous
  61.           if (e = document.querySelector('link[rel="prev"][href]')) {
  62.             ev.stopImmediatePropagation();
  63.             ev.stopPropagation();
  64.             ev.preventDefault();
  65.             location.href = e.href;
  66.             return
  67.           }
  68.           clickLink(rxPrev) || clickLink(rxPrev2);
  69.           break;
  70.         case "ArrowRight": //next
  71.           if (e = document.querySelector('link[rel="next"][href]')) {
  72.             ev.stopImmediatePropagation();
  73.             ev.stopPropagation();
  74.             ev.preventDefault();
  75.             location.href = e.href;
  76.             return
  77.           }
  78.           clickLink(rxNext) || clickLink(rxNext2);
  79.           break
  80.       }
  81.     }
  82.   }, true)
  83. })()

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