Codemirror自动完成-建议来源

Codemirror autocomplete - suggestions sources

本文关键字：Codemirror 更新时间：2023-09-26

我正在使用codemirror自动完成演示。它显示了一些javascript关键字，如应用程序缓存、defaultStatus和framenet，以及更多的建议。我希望它显示我的关键字作为建议。但是我找不到这些javascript关键字的来源。请帮我做这件事。。

Javascript模式很难理解。所以我采用了python模式，更改python-hint.js非常容易，我得到了我想要的输出。谢谢Eliran。。

查看javascript-hint.js，它包含一些关键字，可以在源代码中看到。例如javascript关键字（第96行）：

var javascriptKeywords = 
    ("break case catch continue debugger default delete do else false finally for function " +
     "if in instanceof new null return switch throw true try typeof var void while with")
    .split(" ");

这应该会让您开始编写自己的*-hint.js文件。

当我遇到这个问题时，在问自己的问题之前，我实际上是在浏览旧的CodeMirror自动完成问题。

Javascript完成来自多个源代码的组合，正如Eliran所指出的那样，您可以在源代码中看到这一点

这是此时的相关功能：

    function getCompletions(token, context, keywords, options) {
    var found = [], start = token.string, global = options && options.globalScope || window;
    function maybeAdd(str) {
      if (str.lastIndexOf(start, 0) == 0 && !arrayContains(found, str)) found.push(str);
    }
    function gatherCompletions(obj) {
      if (typeof obj == "string") forEach(stringProps, maybeAdd);
      else if (obj instanceof Array) forEach(arrayProps, maybeAdd);
      else if (obj instanceof Function) forEach(funcProps, maybeAdd);
      for (var name in obj) maybeAdd(name);
    }
    if (context && context.length) {
      // If this is a property, see if it belongs to some object we can
      // find in the current environment.
      var obj = context.pop(), base;
      if (obj.type && obj.type.indexOf("variable") === 0) {
        if (options && options.additionalContext)
          base = options.additionalContext[obj.string];
        if (!options || options.useGlobalScope !== false)
          base = base || global[obj.string];
      } else if (obj.type == "string") {
        base = "";
      } else if (obj.type == "atom") {
        base = 1;
      } else if (obj.type == "function") {
        if (global.jQuery != null && (obj.string == '$' || obj.string == 'jQuery') &&
            (typeof global.jQuery == 'function'))
          base = global.jQuery();
        else if (global._ != null && (obj.string == '_') && (typeof global._ == 'function'))
          base = global._();
      }
      while (base != null && context.length)
        base = base[context.pop().string];
      if (base != null) gatherCompletions(base);
    } else {
      // If not, just look in the global object and any local scope
      // (reading into JS mode internals to get at the local and global variables)
      for (var v = token.state.localVars; v; v = v.next) maybeAdd(v.name);
      for (var v = token.state.globalVars; v; v = v.next) maybeAdd(v.name);
      if (!options || options.useGlobalScope !== false)
        gatherCompletions(global);
      forEach(keywords, maybeAdd);
    }
    return found;
  }

在这里你可以看到一些来源keywords是由调用函数（未显示）提供的参数，在本例中，它是Eliran提到的拆分字符串：

 var javascriptKeywords = ("break case catch continue debugger default delete do else false finally for function " +
              "if in instanceof new null return switch throw true try typeof var void while with").split(" ");

这里的逻辑中有一个分支：if (context && context.length) {

在真实情况下，它使用调用方传递的上下文对象（在本例中为属性链）。它可以使用可选的additionalContext对象，或者如果选项中没有明确禁用useGlobalScope，它可以使用全局作为开始查找的基础（字符串、原子和函数类型具有特殊的处理逻辑）。然后，它使用while循环来解析上下文链并调用gatherCompletions。根据传递给gatherCompletions的对象类型，它可以尝试添加拆分字符串提供的其他硬编码列表：

  var stringProps = ("charAt charCodeAt indexOf lastIndexOf substring substr slice trim trimLeft trimRight " +
                     "toUpperCase toLowerCase split concat match replace search").split(" ");
  var arrayProps = ("length concat join splice push pop shift unshift slice reverse sort indexOf " +
                    "lastIndexOf every some filter forEach map reduce reduceRight ").split(" ");
  var funcProps = "prototype apply call bind".split(" ");

或者通过迭代javascript对象本身的属性。

最后，在其他情况下为token.state.localVars、token.state.globalVars，如果未明确禁用，则全局对象将用作gatherCompletions函数的对象。在这里，您还将注意到上面提到的关键字。请注意，global要么在options.globalScope中提供，要么采用window的值。

摘要

只是在这里快速显示所有来源：

javascript关键字
funcProps
阵列道具
字符串道具
全局对象
options.additionalContext
token.state.localVars
token.state.globalVars
上下文属性链

这真的很管用：

<!doctype html>
<html>
  <head>
<title>CodeMirror</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0" charset="UTF-8">
<link rel=stylesheet href="https://CodeMirror.net/doc/docs.css">
<script src="https://CodeMirror.net/addon/hint/anyword-hint.js" id="anyword"></script>
<link rel="stylesheet" href="https://CodeMirror.net/lib/codemirror.css">
<link rel="stylesheet" href="https://CodeMirror.net/addon/hint/show-hint.css">
<link rel="stylesheet" href="https://CodeMirror.net/addon/dialog/dialog.css">
<link rel="stylesheet" href="https://CodeMirror.net/addon/search/matchesonscrollbar.css">
<script src="https://CodeMirror.net/lib/codemirror.js"></script>
<script src="https://CodeMirror.net/addon/edit/closetag.js"></script>
<script src="https://CodeMirror.net/addon/hint/show-hint.js"></script>
<script src="https://CodeMirror.net/addon/hint/sql-hint.js"></script>
 <script src="https://CodeMirror.net/addon/mode/loadmode.js"></script>
<script src="https://CodeMirror.net/mode/meta.js"></script>
<script src="https://CodeMirror.net/addon/hint/xml-hint.js"></script>
<script src="https://CodeMirror.net/addon/hint/html-hint.js"></script>
<script src="https://CodeMirror.net/addon/search/jump-to-line.js"></script>
<script src="https://CodeMirror.net/addon/hint/javascript-hint.js"></script>
<script src="https://CodeMirror.net/mode/xml/xml.js"></script>
<script src="https://CodeMirror.net/mode/javascript/javascript.js"></script>
<script src="https://CodeMirror.net/mode/css/css.js"></script>
<script src="https://CodeMirror.net/mode/htmlmixed/htmlmixed.js"></script>
<script src="https://CodeMirror.net/addon/dialog/dialog.js"></script> 
<script src="https://CodeMirror.net/addon/search/searchcursor.js"></script>
<script src="https://CodeMirror.net/addon/search/jump-to-line.js"></script> 
<script src="https://CodeMirror.net/addon/search/search.js"></script> 
<script src="https://CodeMirror.net/addon/scroll/annotatescrollbar.js"></script> 
<script src="https://CodeMirror.net/addon/search/matchesonscrollbar.js"></script>
</head>
<body>
<div id="editor" onclick="autocomplete()"></div>
<script>
    function autocomplete() {
        
        myCodeMirror.execCommand("autocomplete");
    }
</script>
<script>
   var myCodeMirror = CodeMirror(
   document.getElementById('editor'), {
      lineNumbers: true,
   });
</script>
</body>
</html>