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Library for e-mail forward highlighting

Enable user scripts to highlight forwarded e-mails

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.cn-greasyfork.org/scripts/40782/265774/Library%20for%20e-mail%20forward%20highlighting.js 

  1. function addStyles() {
  2.     if (document.getElementById("email-quotes")) {
  3.         console.log("Styles for e-mail quote highlighting already added, doing nothing");
  4.         return;
  5.     }
  6.     console.log("Adding styles for e-mail quote highlighting");
  7.     var styleNode = document.createElement('style');
  8.     styleNode.setAttribute("type", "text/css");
  9.     styleNode.id = "email-quotes";
  10.     styleNode.innerHTML =
  11.         'mark.quote1 { background: #eee }\n' +
  12.         'mark.quote2 { background: #eef }\n' +
  13.         'mark.quote3 { background: #efe }\n' +
  14.         'mark.quote4 { background: #fee }\n' +
  15.         'mark.quote5 { background: #ddd }\n' +
  16.         'mark.quote6 { background: #ddf }\n' +
  17.         'mark.quote7 { background: #dfd }\n' +
  18.         'mark.quote8 { background: #fdd }\n';
  19.     document.body.appendChild(styleNode);
  20. }
  21.  
  22. function highlightQuotes() {
  23.     addStyles();
  24.     if (
  25.         document.getElementsByClassName("quote1").length ||
  26.         document.getElementsByClassName("quote2").length ||
  27.         document.getElementsByClassName("quote3").length ||
  28.         document.getElementsByClassName("quote4").length ||
  29.         document.getElementsByClassName("quote5").length ||
  30.         document.getElementsByClassName("quote6").length ||
  31.         document.getElementsByClassName("quote7").length ||
  32.         document.getElementsByClassName("quote8").length
  33.     ) {
  34.         console.log("E-mail quotes already highlighted, doing nothing");
  35.         return;
  36.     }
  37.     console.log("Highlighting e-mail quotes");
  38.     var context = document.querySelector("pre,blockquote,.Wordsection1,.MsoPlainText,body");
  39.     var instance = new Mark(context);
  40.     instance.markRegExp(/^(> *){1}([^>\n].*|)$/gm, {"className" : "quote1" });
  41.     instance.markRegExp(/^(> *){2}([^>\n].*|)$/gm, {"className" : "quote2" });
  42.     instance.markRegExp(/^(> *){3}([^>\n].*|)$/gm, {"className" : "quote3" });
  43.     instance.markRegExp(/^(> *){4}([^>\n].*|)$/gm, {"className" : "quote4" });
  44.     instance.markRegExp(/^(> *){5}([^>\n].*|)$/gm, {"className" : "quote5" });
  45.     instance.markRegExp(/^(> *){6}([^>\n].*|)$/gm, {"className" : "quote6" });
  46.     instance.markRegExp(/^(> *){7}([^>\n].*|)$/gm, {"className" : "quote7" });
  47.     instance.markRegExp(/^(> *){8,}([^>\n].*|)$/gm, {"className" : "quote8" });
  48. }