Groovy script to auto open an browser based on folder change (same as the last example on https://gist.github.com/DinisCruz-Dev/9214909/ but on a separate gist so that it embeds ok in a blog post)

1. Groovy script to auto open an browser based on folder change.groovy

import java.nio.file.*;
import com.sun.nio.file.*
import java.nio.file.attribute.*;

def editorTitle  = "index.html"

def refreshBrowser = { path ->
				eclipse.log("Opening browser with: " + path);
				def view = eclipse.views.create("Synced WebBrowser");
				if (view.controls().size() == 0)
					view.add.browser();
				view.controls().first().open(path);
	   	     };

def startWatch    =  { file ->
				def filePath = file.toString();
				def folder   =  file.getParent();
				def path_Root = Paths.get(folder);
				
				refreshBrowser(filePath);

				def watchService =FileSystems.getDefault().newWatchService();

				path_Root.register(watchService,  (WatchEvent.Kind[] )[StandardWatchEventKinds.ENTRY_MODIFY], SensitivityWatchEventModifier.HIGH);

				Files.walkFileTree(path_Root, new SimpleFileVisitor<Path>() 
					{
    						public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException
            					{
           						dir.register(watchService,  (WatchEvent.Kind[] )[StandardWatchEventKinds.ENTRY_MODIFY], SensitivityWatchEventModifier.HIGH);
            						return FileVisitResult.CONTINUE;
            					}
            				});

				while(true)
				{
					eclipse.log("About to start watching folder: " + folder);
					def key = watchService.take();
					eclipse.log("After .take()");
					for (def event : key.pollEvents())
					{
						eclipse.log("   event: " + event.kind());	
					}
					refreshBrowser(filePath);
					key.reset()
				}
				return key;
		     }

def editor  = eclipse.editors.get(editorTitle).getEditor(true);

def file    = editor.getEditorInput().getPath().toFile();

startWatch(file);
						
//Config:UIThread_False