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markdown helper

在中文输入法中，将·自动替换成`，》替换成>，！替换成'* '(减少按键距离)

  1. // ==UserScript==
  2. // @name         markdown helper
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.6.1
  5. // @description  在中文输入法中，将·自动替换成`，》替换成>，！替换成'* '(减少按键距离)
  6. // @author       鹿之城
  7. // @match        https://www.nowcoder.com/creation/write/*
  8. // @match        https://maxiang.io/
  9. // @grant        none
  10. // @license MIT
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.     'use strict';
  15.  
  16.     console.log('md专用转换脚本已加载');
  17.  
  18.     function getCaretPosition(element) {
  19.         let caretOffset = 0;
  20.         let doc = element.ownerDocument || element.document;
  21.         let win = doc.defaultView || doc.parentWindow;
  22.         let sel = win.getSelection();
  23.         if (sel.rangeCount > 0) {
  24.             let range = sel.getRangeAt(0);
  25.             let preCaretRange = range.cloneRange();
  26.             preCaretRange.selectNodeContents(element);
  27.             preCaretRange.setEnd(range.endContainer, range.endOffset);
  28.             caretOffset = preCaretRange.toString().length;
  29.         }
  30.         return caretOffset;
  31.     }
  32.  
  33.     function setCaretPosition(element, offset) {
  34.         let charIndex = 0, range = document.createRange();
  35.         range.setStart(element, 0);
  36.         range.collapse(true);
  37.         let nodeStack = [element], node, foundStart = false, stop = false;
  38.  
  39.         while (!stop && (node = nodeStack.pop())) {
  40.             if (node.nodeType == 3) {
  41.                 let nextCharIndex = charIndex + node.length;
  42.                 if (!foundStart && offset >= charIndex && offset <= nextCharIndex) {
  43.                     range.setStart(node, offset - charIndex);
  44.                     range.setEnd(node, offset - charIndex);
  45.                     stop = true;
  46.                 }
  47.                 charIndex = nextCharIndex;
  48.             } else {
  49.                 let i = node.childNodes.length;
  50.                 while (i--) {
  51.                     nodeStack.push(node.childNodes[i]);
  52.                 }
  53.             }
  54.         }
  55.  
  56.         let sel = window.getSelection();
  57.         sel.removeAllRanges();
  58.         sel.addRange(range);
  59.     }
  60.  
  61.     document.addEventListener('compositionend', function(e) {
  62.         let target = e.target;
  63.         if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA' || target.isContentEditable) {
  64.             let start = getCaretPosition(target);
  65.             console.log('替换前 - 光标位置:', start);
  66.  
  67.             let value = target.value || target.innerHTML;
  68.             let lengthChange = 0;
  69.  
  70.             if (value.includes('》')) {
  71.                 console.log('检测到"》"，将其替换为">"');
  72.                 value = value.replace(/》/g, '> ');
  73.                 lengthChange = '> '.length - '》'.length;
  74.             } else if (value.includes('·')) {
  75.                 console.log('检测到"·"，将其替换为"`"');
  76.                 value = value.replace(/·/g, '`');
  77.                 lengthChange = '` '.length - '·'.length;
  78.             }
  79.             //else if (value.includes('~')) {
  80.               //  console.log('检测到"~"，将其替换为"* "');
  81.                // value = value.replace(/~/g, '*  ');
  82.                 //lengthChange = '*  '.length - '~'.length;
  83.         //    }
  84.             else if (value.includes('！')) {
  85.                 console.log('检测到"！"，将其替换为"* "');
  86.                 value = value.replace(/！/g, '*  ');
  87.                 lengthChange = '*  '.length - '~'.length;
  88.             }
  89.  
  90.  
  91.             if (lengthChange !== 0) {
  92.                 start += lengthChange;
  93.             }
  94.  
  95.             if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA') {
  96.                 target.value = value;
  97.                 target.setSelectionRange(start, start);
  98.                 console.log('替换后 - 光标位置:', start);
  99.             } else {
  100.                 target.innerHTML = value;
  101.                 setCaretPosition(target, start);
  102.                 console.log('替换后 - 光标位置:', start);
  103.             }
  104.         }
  105.     });
  106.  
  107. })();

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