<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>ACE Code Lens demo</title>
  <style type="text/css" media="screen">
    body {
        overflow: hidden;
    }
    #editor {
        margin: 0;
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
    }
  </style>
</head>
<body>
<pre id="editor"></pre>
<!-- load ace -->
<script src="../src/ace.js"></script>
<!-- load ace code_lens extension -->
<script src="../src/ext-code_lens.js"></script>
<script>
    var editor = ace.edit("editor");
    editor.session.setMode("ace/mode/html");
    var commandId = "describeCodeLens";
    editor.commands.addCommand({
        name: commandId,
        exec: function(editor, args) {
            // services available in `ctx`
            alert('CodeLens command called with arguments ' + args);
        }
    });
    editor.commands.addCommand({
        name: "clearCodeLenses",
        exec: function(editor, args) {
            editor.setOption("enableCodeLens", false);
            codeLens.clear(editor.session);
        }
    });
    editor.setOption("enableCodeLens", true);
    codeLens.registerCodeLensProvider(editor, {
        provideCodeLenses: function(session, callback) {
            var p = [{
                start: {row: 0},
 
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