Monaco 中有个展开选择的功能，默认如果我们选择 function，扩展选择就会选择到行尾，再扩展就会选中整个函数，效果如下：
Monaco 可以自定义选择范围，通过 registerSelectionRangeProvider 注册 selectionRangeProvider 处理函数
实现 provideSelectionRanges 并返回选择范围
返回位置信息 SelectRange
代码实现如下
export function selectionRangeProvider(editor: monacoEditor.editor.IStandaloneCodeEditor,monaco: typeof monacoEditor
) {return monaco.languages.registerSelectionRangeProvider("mySpecialLanguage", {provideSelectionRanges: function(model, positions, token) {const ranges = positions.map(position => {const word = model.getWordAtPosition(position);if (word) {const range = new monaco.Range(position.lineNumber,word.startColumn,position.lineNumber,word.endColumn)return [{range: range}];}return [{ range: new monaco.Range(position.lineNumber, position.column, position.lineNumber, position.column) },{ range: new monaco.Range(position.lineNumber, position.column, position.lineNumber, position.column) }];});return ranges;}
});}
