Question

我正在开发IntelliJ Idea 13的插件。我在beforeDocumentSaving进行了一些更改，并使用了document.setText：

public class AppendAction implements ApplicationComponent
{
    @Override public void initComponent()
    {
        MessageBus bus = ApplicationManager.getApplication().getMessageBus();
        MessageBusConnection connection = bus.connect();

        connection.subscribe(AppTopics.FILE_DOCUMENT_SYNC, new FileDocumentManagerAdapter()
            {
                @Override public void beforeDocumentSaving(Document document)
                {
                    document.setText(appendSomething(document.getText()));                        
                }
            });
    }
}

这很好用，我唯一的问题是当这个插件运行时，我想撤消更改时，我会看到以下错误消息：

Cannot Undo
Following files have changes that cannot be undone:

任何Idea？： - ）

Answer 1

答案是将document.setText包裹到ApplicationManager.getApplication().runWriteAction和CommandProcessor.getInstance().runUndoTransparentAction中。

我在githib上的intellij-community源代码中找到了一个示例TrailingSpacesStripper： https://github.com/JetBrains/intellij-community/blob/master/platform/platform-impl/src/com/intellij/openapi/editor/impl/TrailingSpacesStripper.java

public class AppendAction implements ApplicationComponent
{
    @Override public void initComponent()
    {
        MessageBus bus = ApplicationManager.getApplication().getMessageBus();
        MessageBusConnection connection = bus.connect();

        connection.subscribe(AppTopics.FILE_DOCUMENT_SYNC, new FileDocumentManagerAdapter()
            {
                @Override public void beforeDocumentSaving(final Document document)
                {
                    ApplicationManager.getApplication().runWriteAction(new DocumentRunnable(document, null)
                        {
                            @Override public void run()
                            {
                                CommandProcessor.getInstance().runUndoTransparentAction(new Runnable()
                                    {
                                        @Override public void run()
                                        {
                                            document.setText(appendSomething(document.getText()));
                                        }
                                    });
                            }
                        });
                }
            });
    }
}

Answer 2

您应该通过CommandProcessor API包装更改。

来自IntelliJ IDEA Architectural Overview：

任何修改文档内容的操作都必须包含在命令(CommandProcessor.getInstance().executeCommand())中。 executeCommand（）调用可以嵌套，最外面的executeCommand调用添加到撤消堆栈。如果在命令中修改了多个文档，则撤消此命令将默认向用户显示确认对话框。

IntelliJ Idea插件无法撤消document.setText

2 个答案: