feat: general refactor, buffer-aware cursors, various fixes

src/main/java/com/codemp/intellij/CodeMP.java

@@ -1,15 +1,21 @@
 package com.codemp.intellij;
 
+import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.util.SystemInfo;
 import cz.adamh.utils.NativeUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 public class CodeMP {
 	public static Logger LOGGER = LoggerFactory.getLogger(CodeMP.class);
 
+	public static Map<String, Editor> ACTIVE_BUFFERS = new ConcurrentHashMap<>();
+	public static Map<Editor, String> ACTIVE_BUFFERS_REVERSE = new ConcurrentHashMap<>(); //TODO jank
+
 	private static boolean loadedLibrary = false;
 	public static void loadLibrary() {
 		if(!loadedLibrary) {

src/main/java/com/codemp/intellij/actions/buffer/BufferAttachAction.java

@@ -3,72 +3,27 @@ package com.codemp.intellij.actions.buffer;
 import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.jni.BufferHandler;
 import com.codemp.intellij.jni.CodeMPHandler;
-import com.codemp.intellij.jni.TextChangeWrapper;
-import com.codemp.intellij.listeners.BufferEventListener;
+import com.codemp.intellij.task.TaskManager;
 import com.codemp.intellij.util.ActionUtil;
-import com.codemp.intellij.util.DisposableRegistry;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.application.ApplicationManager;
-import com.intellij.openapi.command.CommandProcessor;
-import com.intellij.openapi.editor.Document;
-import com.intellij.openapi.progress.ProgressIndicator;
-import com.intellij.openapi.progress.ProgressManager;
-import com.intellij.openapi.progress.Task;
-import com.intellij.openapi.project.Project;
+import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.ui.Messages;
 import org.jetbrains.annotations.NotNull;
 
 public class BufferAttachAction extends AnAction {
-
 	public static void attach(AnActionEvent e, String buffer, boolean silent) throws Exception {
 		BufferHandler bufferHandler = CodeMPHandler.attach(buffer);
 		if(!silent) Messages.showInfoMessage(String.format("Attached to buffer to %s!", buffer),
 			"CodeMP Buffer Attach");
 		CodeMP.LOGGER.debug("Attached to buffer to {}!", buffer);
 
-		//register buffer change listener
-		//TODO "get" the Document corresponding to buffer, for now use the current one
-		BufferEventListener listener = new BufferEventListener(buffer);
+		//TODO "get" the Editor corresponding to buffer, for now use the current one
+		Editor editor = ActionUtil.getCurrentEditor(e);
 
-		Project project = ActionUtil.getCurrentProject(e);
-		Document document = ActionUtil.getCurrentEditor(e).getDocument();
-		document.addDocumentListener(listener, DisposableRegistry.getOrCreate(String.format("codemp-buffer-%s", buffer)));
-
-		ProgressManager.getInstance().run(new Task.Backgroundable(e.getProject(), "Awaiting CodeMP buffer events") {
-			@Override
-			@SuppressWarnings({"InfiniteLoopStatement", "UnstableApiUsage"})
-			public void run(@NotNull ProgressIndicator indicator) {
-				try {
-					Thread.sleep(100); //tonioware
-				} catch(InterruptedException ex) {
-					throw new RuntimeException(ex);
-				}
-
-				while(true) {
-					try {
-						TextChangeWrapper event = bufferHandler.recv();
-
-						CodeMP.LOGGER.debug("Received text change {} from offset {} to {}!",
-							event.getContent(), event.getStart(), event.getEnd());
-
-						ApplicationManager.getApplication().invokeLaterOnWriteThread(() -> {
-							ApplicationManager.getApplication().runWriteAction(() -> {
-								CommandProcessor.getInstance().executeCommand(
-									project,
-									() -> document.replaceString(
-										(int) event.getStart(), (int) event.getEnd(), event.getContent()),
-									"CodeMPBufferReceive",
-									"codemp-buffer-receive", //TODO: mark this with the name
-									document);
-							});
-						});
-					} catch(Exception ex) {
-						throw new RuntimeException(ex);
-					}
-				}
-			}
-		});
+		TaskManager
+			.getOrCreateBufferTask(ActionUtil.getCurrentProject(e))
+			.registerListener(bufferHandler, editor);
 	}
 
 	@Override

src/main/java/com/codemp/intellij/actions/buffer/BufferDetachAction.java

@@ -3,7 +3,8 @@ package com.codemp.intellij.actions.buffer;
 import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.exceptions.ide.BufferDetachException;
 import com.codemp.intellij.jni.CodeMPHandler;
-import com.codemp.intellij.util.DisposableRegistry;
+import com.codemp.intellij.task.BufferEventAwaiterTask;
+import com.codemp.intellij.task.TaskManager;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import com.intellij.openapi.ui.Messages;
@@ -14,12 +15,19 @@ public class BufferDetachAction extends AnAction {
 		boolean res = CodeMPHandler.detach(buffer);
 		if(!res) throw new BufferDetachException(buffer);
 
-		//dispose of listener's associated disposable
-		DisposableRegistry.disposeOf(String.format("codemp-buffer-%s", buffer));
-
+		CodeMP.ACTIVE_BUFFERS.remove(buffer);
+		BufferEventAwaiterTask task = TaskManager.getBufferTask();
+		if(task != null) {
+			task.unregisterListener(buffer);
 			if(!silent) Messages.showInfoMessage(String.format("Detached from buffer %s!", buffer),
 				"Detach from CodeMP Buffer");
 			CodeMP.LOGGER.debug("Detached from buffer {}!", buffer);
+		} else {
+			if(!silent) Messages.showErrorDialog(
+				String.format("Failed to detach from %s: buffer event task was dead!", buffer),
+				"Detach from CodeMP Buffer");
+			CodeMP.LOGGER.debug("Failed to detach from {}: buffer event task was dead!", buffer);
+		}
 	}
 
 	@Override

src/main/java/com/codemp/intellij/actions/workspace/WorkspaceJoinAction.java

@@ -2,57 +2,32 @@ package com.codemp.intellij.actions.workspace;
 
 import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.jni.CodeMPHandler;
-import com.codemp.intellij.jni.CursorEventWrapper;
 import com.codemp.intellij.jni.CursorHandler;
 import com.codemp.intellij.listeners.CursorEventListener;
+import com.codemp.intellij.task.CursorEventAwaiterTask;
+import com.codemp.intellij.task.TaskManager;
 import com.codemp.intellij.util.ActionUtil;
-import com.codemp.intellij.util.ColorUtil;
-import com.codemp.intellij.util.DisposableRegistry;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
-import com.intellij.openapi.application.ApplicationManager;
-import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.EditorFactory;
-import com.intellij.openapi.editor.markup.HighlighterLayer;
-import com.intellij.openapi.editor.markup.HighlighterTargetArea;
-import com.intellij.openapi.editor.markup.RangeHighlighter;
-import com.intellij.openapi.editor.markup.TextAttributes;
-import com.intellij.openapi.progress.ProgressIndicator;
 import com.intellij.openapi.progress.ProgressManager;
-import com.intellij.openapi.progress.Task;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.Messages;
 import org.jetbrains.annotations.NotNull;
 
-import java.awt.*;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
 public class WorkspaceJoinAction extends AnAction {
-
-	private static final Map<String, RangeHighlighter> highlighterMap = new ConcurrentHashMap<>();
-
 	public static void join(AnActionEvent e, String workspace, boolean silent) throws Exception {
 		CursorHandler cursorHandler = CodeMPHandler.join(workspace);
 
 		if(!silent) Messages.showInfoMessage(String.format("Joined workspace %s!", workspace), "CodeMP");
 		else CodeMP.LOGGER.debug("Joined workspace {}!", workspace);
 
-		Editor editor = ActionUtil.getCurrentEditor(e);
-
-		CursorEventAwaiter task = new CursorEventAwaiter(
-			e.getProject(),
-			"Awaiting CodeMP cursor events",
-			cursorHandler,
-			editor
-		);
+		CursorEventAwaiterTask task = TaskManager
+			.getOrCreateCursorTask(ActionUtil.getCurrentProject(e), cursorHandler);
 
 		EditorFactory.getInstance()
 			.getEventMulticaster()
-			.addCaretListener(new CursorEventListener(),
-				DisposableRegistry.getOrCreate(String.format("codemp-cursor-%s", workspace)));
-
-		ProgressManager.getInstance().run(task);
+			.addCaretListener(new CursorEventListener(cursorHandler), task);
 	}
 
 	@Override
@@ -72,68 +47,4 @@ public class WorkspaceJoinAction extends AnAction {
 				"CodeMP Join");
 		}
 	}
-
-	//TODO this is janky as it shows a progress bar it doesn't use tbh
-	//implements disposable so i can use it as lifetime ig
-	private static class CursorEventAwaiter extends Task.Backgroundable {
-
-		private final CursorHandler handler;
-		private final Editor editor;
-
-		public CursorEventAwaiter(Project project, String title, CursorHandler handler, Editor editor) {
-			super(project, title);
-			this.handler = handler;
-			this.editor = editor;
-		}
-
-		@Override
-		@SuppressWarnings("InfiniteLoopStatement")
-		public void run(@NotNull ProgressIndicator indicator) {
-			while(true) {
-				try {
-					CursorEventWrapper event = handler.recv();
-					int startOffset = this.editor.getDocument().getLineStartOffset(event.getStartRow()) + event.getStartCol();
-					int endOffset = this.editor.getDocument().getLineStartOffset(event.getEndRow()) + event.getEndCol();
-
-					ApplicationManager.getApplication().invokeLater(() -> {
-						try {
-							RangeHighlighter highlighter = highlighterMap.get(event.getUser());
-							if(highlighter != null)
-								highlighter.dispose();
-
-							CodeMP.LOGGER.debug(
-								"Cursor moved by user {}! Start pos: {}x {}y; end pos: {}x {}y with buffer {}!",
-								event.getUser(),
-								event.getStartCol(), event.getStartCol(),
-								event.getEndRow(), event.getEndCol(),
-								event.getBuffer());
-
-							highlighterMap.put(event.getUser(), this.editor
-								.getMarkupModel()
-								.addRangeHighlighter(
-									startOffset,
-									endOffset,
-									HighlighterLayer.SELECTION,
-									new TextAttributes(
-										null,
-										ColorUtil.colorFromUsername(event.getUser()),
-										null,
-										null,
-										Font.PLAIN
-									), HighlighterTargetArea.EXACT_RANGE
-								));
-						} catch(IllegalArgumentException ex) {
-							//suppress if the cursor only exceeds length by one, it's probably just him adding something at EOF
-							if(endOffset - this.editor.getDocument().getTextLength() != 1)
-								throw ex;
-						} catch(Exception ex) {
-							throw new RuntimeException(ex);
-						}
-					});
-				} catch(Exception ex) {
-					throw new RuntimeException(ex);
-				}
-			}
-		}
-	}
 }

src/main/java/com/codemp/intellij/actions/workspace/WorkspaceLeaveAction.java

@@ -2,7 +2,6 @@ package com.codemp.intellij.actions.workspace;
 
 import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.jni.CodeMPHandler;
-import com.codemp.intellij.util.DisposableRegistry;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import com.intellij.openapi.ui.Messages;
@@ -12,9 +11,6 @@ public class WorkspaceLeaveAction extends AnAction {
 	public static void leave(boolean silent) throws Exception {
 		CodeMPHandler.leaveWorkspace();
 
-		//dispose of listener's associated disposable
-		DisposableRegistry.disposeOf("codemp-cursor");
-
 		if(!silent) Messages.showInfoMessage("Left workspace!",
 			"Detach from CodeMP Buffer" );
 		CodeMP.LOGGER.debug("Left workspace!");

src/main/java/com/codemp/intellij/listeners/BufferEventListener.java

@@ -1,5 +1,6 @@
 package com.codemp.intellij.listeners;
 
+import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.jni.BufferHandler;
 import com.codemp.intellij.jni.CodeMPHandler;
 import com.intellij.openapi.command.CommandProcessor;
@@ -9,14 +10,17 @@ import org.jetbrains.annotations.NotNull;
 
 public class BufferEventListener implements DocumentListener {
 
-	private final String bufferName;
+	private final BufferHandler bufferHandler;
 
-	public BufferEventListener(String bufferName) {
-		this.bufferName = bufferName;
+	public BufferEventListener(BufferHandler bufferHandler) {
+		this.bufferHandler = bufferHandler;
 	}
 
 	@Override
 	public void documentChanged(@NotNull DocumentEvent event) {
+		CodeMP.LOGGER.debug("Changed {} to {} at offset {}",
+			event.getOldFragment(), event.getNewFragment(), event.getOffset());
+
 		Object group = CommandProcessor.getInstance().getCurrentCommandGroupId();
 		if(group instanceof String groupString && groupString.startsWith("codemp-buffer-receive"))
 			return;
@@ -24,8 +28,7 @@ public class BufferEventListener implements DocumentListener {
 		try { //TODO move actions break
 			int changeOffset = event.getOffset();
 			CharSequence newFragment = event.getNewFragment();
-			BufferHandler bufferHandler = CodeMPHandler.getBuffer(this.bufferName);
-			bufferHandler.send(changeOffset,
+			this.bufferHandler.send(changeOffset,
 				changeOffset + event.getOldFragment().length(),
 				newFragment.toString());
 		} catch(Exception e) {

src/main/java/com/codemp/intellij/listeners/CursorEventListener.java

@@ -2,6 +2,7 @@ package com.codemp.intellij.listeners;
 
 import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.jni.CodeMPHandler;
+import com.codemp.intellij.jni.CursorHandler;
 import com.intellij.openapi.editor.Caret;
 import com.intellij.openapi.editor.VisualPosition;
 import com.intellij.openapi.editor.event.CaretEvent;
@@ -9,6 +10,13 @@ import com.intellij.openapi.editor.event.CaretListener;
 import org.jetbrains.annotations.NotNull;
 
 public class CursorEventListener implements CaretListener {
+
+	private final CursorHandler cursorHandler;
+
+	public CursorEventListener(CursorHandler cursorHandler) {
+		this.cursorHandler = cursorHandler;
+	}
+
 	@Override
 	public void caretPositionChanged(@NotNull CaretEvent event) {
 		Caret caret = event.getCaret();
@@ -20,8 +28,10 @@ public class CursorEventListener implements CaretListener {
 			VisualPosition endPos = caret.getSelectionEndPosition();
 			CodeMP.LOGGER.debug("Caret moved from {}x {}y to {}x {}y",
 				startPos.line, startPos.column, endPos.line, endPos.column);
-			CodeMPHandler.getCursor().send(
-				"", startPos.line, startPos.column, endPos.line, endPos.column
+			this.cursorHandler.send(
+				CodeMP.ACTIVE_BUFFERS_REVERSE.get(event.getEditor()),
+				startPos.line, startPos.column,
+				endPos.line, endPos.column
 			);
 		} catch(Exception ex) {
 			throw new RuntimeException(ex);

src/main/java/com/codemp/intellij/task/BufferEventAwaiterTask.java

@@ -0,0 +1,107 @@
+package com.codemp.intellij.task;
+
+import com.codemp.intellij.CodeMP;
+import com.codemp.intellij.jni.BufferHandler;
+import com.codemp.intellij.jni.CodeMPHandler;
+import com.codemp.intellij.jni.TextChangeWrapper;
+import com.codemp.intellij.listeners.BufferEventListener;
+import com.intellij.openapi.Disposable;
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.command.CommandProcessor;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.progress.ProgressIndicator;
+import com.intellij.openapi.progress.Task;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Disposer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class BufferEventAwaiterTask extends Task.Backgroundable implements Disposable {
+	private final Map<String, Disposable> bufferListeners = new ConcurrentHashMap<>();
+
+	public BufferEventAwaiterTask(@NotNull Project project) {
+		super(project, "Awaiting CodeMP buffer events", false);
+	}
+
+	public void registerListener(BufferHandler handler, Editor editor) {
+		CodeMP.ACTIVE_BUFFERS.put(handler.getName(), editor); //mark as active
+		CodeMP.ACTIVE_BUFFERS_REVERSE.put(editor, handler.getName());
+
+		Disposable disposable = Disposer
+			.newDisposable(this, String.format("codemp-buffer-%s", handler.getName()));
+
+		editor.getDocument()
+			.addDocumentListener(new BufferEventListener(handler), disposable);
+
+		bufferListeners.put(handler.getName(), disposable);
+	}
+
+	public void unregisterListener(String name) {
+		Disposable listener = this.bufferListeners.remove(name);
+		if(listener != null)
+			listener.dispose();
+	}
+
+	@Override
+	public void dispose() {}
+
+	@Override
+	@SuppressWarnings({"InfiniteLoopStatement", "UnstableApiUsage"})
+	public void run(@NotNull ProgressIndicator indicator) {
+		try {
+			Thread.sleep(1000); //tonioware
+		} catch(InterruptedException ex) {
+			throw new RuntimeException(ex);
+		}
+
+		try {
+			while(true) {
+				try {
+					String buffer = CodeMPHandler.selectBuffer();
+					BufferHandler handler = CodeMPHandler.getBuffer(buffer);
+
+					List<TextChangeWrapper> changeList = new ArrayList<>();
+					while(true) {
+						Optional<TextChangeWrapper> changeOptional;
+						try {
+							 changeOptional = handler.tryRecv();
+						} catch(Exception e) {
+							CodeMP.LOGGER.error(e.getMessage());
+							if(e.getMessage().equals("Error: deadlocked! (safe to retry)"))
+								continue;
+							else throw e;
+						}
+						if(changeOptional.isEmpty())
+							break;
+						TextChangeWrapper change = changeOptional.get();
+						CodeMP.LOGGER.debug("Received text change {} from offset {} to {}!",
+							change.getContent(), change.getStart(), change.getEnd());
+						changeList.add(change);
+					}
+
+					Editor bufferEditor = CodeMP.ACTIVE_BUFFERS.get(buffer);
+
+					ApplicationManager.getApplication().invokeLaterOnWriteThread(() ->
+						ApplicationManager.getApplication().runWriteAction(() ->
+							CommandProcessor.getInstance().executeCommand(
+								this.myProject,
+								() -> changeList.forEach((change) ->
+									bufferEditor.getDocument().replaceString(
+										(int) change.getStart(), (int) change.getEnd(), change.getContent())
+								),
+								"CodeMPBufferReceive",
+								"codemp-buffer-receive", //TODO: mark this with the name
+								bufferEditor.getDocument()
+						)));
+				} catch(Exception ex) {
+					throw new RuntimeException(ex);
+				}
+			}
+		} catch(Exception ex) {
+			TaskManager.nullBufferTask();
+			Disposer.dispose(this); //stopped
+		}
+	}
+}

src/main/java/com/codemp/intellij/task/CursorEventAwaiterTask.java

@@ -0,0 +1,100 @@
+package com.codemp.intellij.task;
+
+import com.codemp.intellij.CodeMP;
+import com.codemp.intellij.jni.CursorEventWrapper;
+import com.codemp.intellij.jni.CursorHandler;
+import com.codemp.intellij.util.ColorUtil;
+import com.intellij.openapi.Disposable;
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.openapi.editor.markup.HighlighterLayer;
+import com.intellij.openapi.editor.markup.HighlighterTargetArea;
+import com.intellij.openapi.editor.markup.RangeHighlighter;
+import com.intellij.openapi.editor.markup.TextAttributes;
+import com.intellij.openapi.progress.ProgressIndicator;
+import com.intellij.openapi.progress.Task;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Disposer;
+import org.jetbrains.annotations.NotNull;
+
+import java.awt.*;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+//TODO this is janky as it shows a progress bar it doesn't use tbh
+//implements disposable so i can use it as lifetime ig
+public class CursorEventAwaiterTask extends Task.Backgroundable implements Disposable {
+	private final CursorHandler handler;
+	private final Map<String, RangeHighlighter> highlighterMap = new ConcurrentHashMap<>();
+
+	public CursorEventAwaiterTask(@NotNull Project project, @NotNull CursorHandler handler) {
+		super(project, "Awaiting CodeMP cursor events", false);
+		this.handler = handler;
+	}
+
+	@Override
+	public void dispose() {}
+
+	@Override
+	@SuppressWarnings("InfiniteLoopStatement")
+	public void run(@NotNull ProgressIndicator indicator) {
+		assert myProject != null; //will never fail
+		try {
+			while(true) {
+				try {
+					CursorEventWrapper event = handler.recv();
+
+					Editor editor = CodeMP.ACTIVE_BUFFERS.get(event.getBuffer());
+					if(editor == null)
+						continue;
+
+					CodeMP.LOGGER.debug(
+						"Cursor moved by user {}! Start pos: {}x {}y; end pos: {}x {}y in buffer {}!",
+						event.getUser(),
+						event.getStartCol(), event.getStartCol(),
+						event.getEndRow(), event.getEndCol(),
+						event.getBuffer());
+
+					int startOffset = editor.getDocument().getLineStartOffset(event.getStartRow()) + event.getStartCol();
+					int endOffset = editor.getDocument().getLineStartOffset(event.getEndRow()) + event.getEndCol();
+
+					ApplicationManager.getApplication().invokeLater(() -> {
+						try {
+							RangeHighlighter highlighter = this.highlighterMap.get(event.getUser());
+							if(highlighter != null)
+								highlighter.dispose();
+
+							this.highlighterMap.put(event.getUser(), editor
+								.getMarkupModel()
+								.addRangeHighlighter(
+									startOffset,
+									endOffset,
+									HighlighterLayer.SELECTION,
+									new TextAttributes(
+										null,
+										ColorUtil.colorFromUsername(event.getUser()),
+										null,
+										null,
+										Font.PLAIN
+									), HighlighterTargetArea.EXACT_RANGE
+								));
+						} catch(IllegalArgumentException ex) {
+							//suppress if the cursor only exceeds length by one, it's probably just him adding something at EOF
+							if(endOffset - editor.getDocument().getTextLength() != 1)
+								throw ex;
+						} catch(Exception ex) {
+							throw new RuntimeException(ex);
+						}
+					});
+				} catch(Exception ex) {
+					throw new RuntimeException(ex);
+				}
+			}
+		} catch(Exception ex) { //exited
+			this.highlighterMap.forEach((s, r) -> r.dispose());
+			TaskManager.nullCursorTask();
+			Disposer.dispose(this);
+		}
+	}
+}

src/main/java/com/codemp/intellij/task/TaskManager.java

@@ -0,0 +1,40 @@
+package com.codemp.intellij.task;
+
+import com.codemp.intellij.jni.CursorHandler;
+import com.intellij.openapi.progress.ProgressManager;
+import com.intellij.openapi.project.Project;
+
+public class TaskManager {
+	private static CursorEventAwaiterTask cursorTask = null;
+
+	//TODO in the future joining a workspace will give you a project matching remote
+	public static CursorEventAwaiterTask getOrCreateCursorTask(Project project, CursorHandler handler) {
+		if(cursorTask != null)
+			return cursorTask;
+		cursorTask = new CursorEventAwaiterTask(project, handler);
+		ProgressManager.getInstance().run(cursorTask);
+		return cursorTask;
+	}
+
+	public static void nullCursorTask() {
+		cursorTask = null;
+	}
+
+	private static BufferEventAwaiterTask bufferTask = null;
+
+	public static BufferEventAwaiterTask getBufferTask() {
+		return bufferTask;
+	}
+
+	public static BufferEventAwaiterTask getOrCreateBufferTask(Project project) {
+		if(bufferTask != null)
+			return bufferTask;
+		bufferTask = new BufferEventAwaiterTask(project);
+		ProgressManager.getInstance().run(bufferTask);
+		return bufferTask;
+	}
+
+	public static void nullBufferTask() {
+		bufferTask = null;
+	}
+}

src/main/java/com/codemp/intellij/util/DisposableRegistry.java

@@ -1,66 +0,0 @@
-package com.codemp.intellij.util;
-
-import com.intellij.openapi.Disposable;
-import com.intellij.openapi.util.Disposer;
-
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-/**
- * A registry holding {@link Disposable Disposables} used within the plugin,
- * since there's no other way to keep track of them across different sections.
- * Only parentless {@link Disposable Disposables} are handled here, since
- * those with a parent will be disposed automatically.
- */
-public class DisposableRegistry {
-	private static final Map<String, Disposable> DISPOSABLE_MAP = new ConcurrentHashMap<>();
-
-	public static boolean exists(String name) {
-		return DISPOSABLE_MAP.containsKey(name);
-	}
-
-	public static Disposable get(String name) {
-		return DISPOSABLE_MAP.get(name);
-	}
-
-	public static Disposable create(String name) {
-		disposeOf(name); //get rid of existing ones, if there is one, to prevent memory leaks
-		Disposable res = Disposer.newDisposable(name);
-		DISPOSABLE_MAP.put(name, res);
-		return res;
-	}
-
-	public static Disposable getOrCreate(String name) {
-		Disposable disposable = DISPOSABLE_MAP.get(name);
-		if(disposable == null)
-			disposable = create(name);
-		return disposable;
-	}
-
-	public static boolean track(String name, Disposable disposable) {
-		boolean replaced = exists(name);
-		if(replaced)
-			disposeOf(name);
-		DISPOSABLE_MAP.put(name, disposable);
-		return replaced;
-	}
-
-	public static boolean disposeOf(String name) {
-		if(exists(name)) {
-			Disposable disposable = DISPOSABLE_MAP.remove(name);
-			Disposer.dispose(disposable);
-			return true;
-		} else return false;
-	}
-
-	public static boolean disposeOf(Disposable disposable) {
-		if(DISPOSABLE_MAP.containsValue(disposable)) {
-			return DISPOSABLE_MAP.entrySet().removeIf(entry -> {
-				if(entry.getValue().equals(disposable)) {
-					Disposer.dispose(disposable, false);
-					return true;
-				} else return false;
-			});
-		} else return false;
-	}
-}

src/main/rust/lib.rs

@@ -67,6 +67,11 @@ impl CodeMPHandler {
 	fn disconnect_buffer(path: String) -> Result<bool, String> {
 		convert(CODEMP_INSTANCE.disconnect_buffer(&path))
 	}
+
+	#[generate_interface]
+	fn select_buffer() -> Result<String, String> {
+		convert(CODEMP_INSTANCE.select_buffer())
+	}
 }
 
 fn convert_buffer(result: Result<Arc<CodempBufferController>, CodempError>) -> Result<BufferHandler, String> {
@@ -206,6 +211,24 @@ impl BufferHandler {
 		panic!("Default constructor for BufferHandler should never be called!")
 	}
 
+	#[generate_interface]
+	fn get_name(&self) -> String {
+		self.buffer.name.clone()
+	}
+
+	#[generate_interface]
+	fn try_recv(&self) -> Result<Option<TextChangeWrapper>, String> {
+		match self.buffer.try_recv() {
+			Err(err) => Err(ErrorWrapper::from(err).get_error_message()),
+			Ok(None) => Ok(None),
+			Ok(Some(change)) => Ok(Some(TextChangeWrapper {
+				start: change.span.start,
+				end: change.span.end,
+				content: change.content.clone()
+			}))
+		}
+	}
+
 	#[generate_interface]
 	fn recv(&self) -> Result<TextChangeWrapper, String> {
 		match self.buffer.blocking_recv(CODEMP_INSTANCE.rt()) {