对文档进行修改前，首先要拿到文档关联的编辑器，获取编辑器的方式有2种：

    1 . 通过hx.window.getActiveTextEditor()

    代码如下：

    1.     let editorPromise = hx.window.getActiveTextEditor();
    2.     editorPromise.then((editor)=>{
    3.         let document = editor.document;
    4.         let selection = editor.selection;
    5.         // Get the word within the selection
    6.         let word = document.getText(selection);
    7.         let reversed = word.split('').reverse().join('');
    8.         editor.edit(editBuilder => {
    9.             editBuilder.replace(selection, reversed);
    10.         });
    11.     });

    2 . 通过编辑器命令,hx.commands.registerTextEditorCommand(‘id’,(editor)=>{});

    代码如下：

    1. hx.commands.registerTextEditorCommand('extension.reverseSelectWord',(editor)=>{
    2.     let document = editor.document;
    3.     let selection = editor.selection;
    4.     // Get the word within the selection
    5.     let word = document.getText(selection);
    6.     let reversed = word.split('').reverse().join('');
    7.     editor.edit(editBuilder => {
    8.         editBuilder.replace(selection, reversed);
    9.     });
    10. });

    完整的代码示例可以在这里找到文档编辑