javascript - codemirror:无需对话即可搜索并突出显示多个单词

Question

目标:我正在使用 codemirror作为编辑。我要

1. 搜索并突出显示多个字符串
2. 我希望能够迭代找到的每个匹配项并打印其行号。
3. 我想以编程方式进行，不想像示例中那样使用对话框 https://codemirror.net/demo/search.html

问题:

1. 在 while 循环中只选择最后一场比赛，之前的比赛被清除，但我也希望它像 https://codemirror.net/demo/search.html 一样突出显示为黄色

JSFIDDLE: https://jsfiddle.net/bababalcksheep/p7xg1utn/30/

代码:

$(document).ready(function() {
  //
  var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
    mode: "text/html",
    lineNumbers: true,
  });
  //
  function search(val) {
    var cursor = editor.getSearchCursor(val);
    while (cursor.findNext()) {
      editor.setSelection(cursor.from(), cursor.to());
        console.log('found at line ', cursor.pos.from.line + 1);
    }
  }
  //
  $('#search').click(function(event) {
    event.preventDefault();
    search(/^alpha|^beta/);
  });

  //
});

Answer 1

调用setSelection一次只能高亮一个连续的子串。相反，您可以使用 markText方法，传入 cursor.from() 和 cursor.to() 以获取要突出显示的位置:

$(document).ready(function() {
  var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
    mode: "text/html",
    lineNumbers: true,
  });
  function search(val) {
    var cursor = editor.getSearchCursor(val);
    while (cursor.findNext()) {
        editor.markText(
          cursor.from(),
          cursor.to(),
          { className: 'highlight' }
        );
    }
  }
  //
  $('#search').click(function(event) {
    event.preventDefault();
    search(/^alpha|^beta/);
  });
});

.CodeMirror {
  border-top: 1px solid black;
  border-bottom: 1px solid black;
  height: 200px;
}
.highlight {
  color: orange;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.44.0/codemirror.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.44.0/addon/search/searchcursor.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.44.0/codemirror.min.css">

<div class="container">
  <p><strong>Objective:</strong></p>
  <p>Find/search and highlight both words <strong>alpha</strong> and <strong>beta</strong> in codemirror editor</p>
  <button id="search" type="button" class="btn btn-primary">Search and highlight</button>
  <br><br>
  <textarea id="code" name="code" rows="8">Text line
alpha 1
Text line
Text line
alpha 2
Text line
Text line
beta 1
Text line</textarea>