如何自动完成摩纳哥自定义函数中的参数？

Question

我目前想将 monaco 编辑器与 PHP 一起使用，我想通过常规 PHP 函数和自定义函数的自动完成来扩展它。

虽然函数的自动完成功能在我的早期原型上运行良好，但自动完成参数不起作用。有关示例，请参见 fiddle： https://jsfiddle.net/95aq6497/2/

目前，只有函数 substr 被提供为自动完成并且正在运行。但是，由 registerSignatureHelpProvider 定义的参数助手不起作用：

 monaco.languages.registerSignatureHelpProvider('php', {
provideSignatureHelp: (model, position, token) => {
  console.log('Signature Help');
  return {
    activeParameter: 0,
    activeSignature: 0,
    signatures: [{
      label: 'string substr(string $string, int $start [, int $length])',
      parameters: [
        {
          label: 'string $string',
          documentation: 'The input string. Must be one character or longer.'
        },
        {
          label: 'int $start',
          documentation: "If $start is non-negative, the returned string will start at the $start'th position in string, counting from zero. For instance, in the string 'abcdef', the character at position 0 is 'a', the character at position 2 is 'c', and so forth.\r\nIf $start is negative, the returned string will start at the $start'th character from the end of string. If $string is less than $start characters long, FALSE will be returned."
        },
        {
          label: 'int $length',
          documentation: 'If $length is given and is positive, the string returned will contain at most $length characters beginning from $start (depending on the length of $string) If $length is given and is negative, then that many characters will be omitted from the end of $string (after the start position has been calculated when a start is negative). If $start denotes the position of this truncation or beyond, FALSE will be returned. If $length is given and is 0, FALSE or NULL, an empty string will be returned. If $length is omitted, the substring starting from $start until the end of the string will be returned.'
        }
      ]
    }]
  };
}

});

函数甚至没有执行，因为 console.log 根本没有触发。我错过了什么？通过函数类似地扩展 javascript 工作得很好，但它不适用于 PHP，所以这里有什么不同？

Answer 1

您似乎没有提供 signatureHelpTriggerCharacters 选项：

monaco.languages.registerSignatureHelpProvider('php', {
  signatureHelpTriggerCharacters: ['(', ','],  <==================== this one
  provideSignatureHelp: (model, position, token) => {

https://jsfiddle.net/hec12da1/

要实现provideSignatureHelp功能我建议你看一下typescript版本

https://github.com/Microsoft/monaco-typescript/blob/7027f0b4ba56fc0df136fb41791aa27e8c25ef54/src/languageFeatures.ts#L262

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