获取Eclipse编辑器的当前源代码？

Question

I am working with Eclipse IDE. I want to develop a plug-in first of all, this plug-in allows me to get the whole source code as a simple string.

I made a simple "hello the world" plug-in using the template "hello world command". Now I am searching to get the source code from the editor of Eclipse and display it with System.out.println(); statement instead of showing HELLO THE WORLD.

I tried this but it shows me only the hierarchical sequence of my project, packageName/src/nameOfClass.

System.out.println(
    Workbench.getInstance().getActiveWorkbenchWindow().getActivePage().getActiveEditor().getEditorInput() 
);

My goal is to get the source code of the class itself (public class nameOfClass{ *** }).

Answer 1

First do not use Workbench this is an internal class and must not be used. Use PlatformUI to get the workbench.

IEditorPart editor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();

if (editor instanceof ITextEditor)
 {
   ITextEditor textEditor = (ITextEditor)editor;

   IDocumentProvider provider = textEditor.getDocumentProvider();

   IEditorInput input = editor.getEditorInput();

   IDocument document = provider.getDocument(input);

   String text = document.get();

   ...
 }

Note: Not all editors are text editors so this needs to be checked (the ITextEditor instance check above).