feat: buffer and workspace disconnect, lifetime system for listeners

src/main/java/com/codemp/intellij/actions/FastForwardAction.java

@@ -1,6 +1,7 @@
 package com.codemp.intellij.actions;
 
 import com.codemp.intellij.actions.buffer.BufferAttachAction;
+import com.codemp.intellij.actions.workspace.WorkspaceJoinAction;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import org.jetbrains.annotations.NotNull;
@@ -13,7 +14,7 @@ public class FastForwardAction extends AnAction {
 	public void actionPerformed(@NotNull AnActionEvent e) {
 		try {
 			ConnectAction.connect("http://alemi.dev:50052", true);
-			JoinAction.join(e, "default", true);
+			WorkspaceJoinAction.join(e, "default", true);
 			BufferAttachAction.attach(e, "test", true);
 		} catch(Exception ex) {
 			throw new RuntimeException(ex);

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

@@ -6,6 +6,7 @@ import com.codemp.intellij.jni.CodeMPHandler;
 import com.codemp.intellij.jni.TextChangeWrapper;
 import com.codemp.intellij.listeners.BufferEventListener;
 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;
@@ -32,12 +33,18 @@ public class BufferAttachAction extends AnAction {
 
 		Project project = ActionUtil.getCurrentProject(e);
 		Document document = ActionUtil.getCurrentEditor(e).getDocument();
-		document.addDocumentListener(listener);
+		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();

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

@@ -0,0 +1,40 @@
+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.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.ui.Messages;
+import org.jetbrains.annotations.NotNull;
+
+public class BufferDetachAction extends AnAction {
+	public static void detach(String buffer, boolean silent) throws Exception {
+		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));
+
+		if(!silent) Messages.showInfoMessage(String.format("Detached from buffer %s!", buffer),
+			"Detach from CodeMP Buffer" );
+		CodeMP.LOGGER.debug("Detached from buffer {}!", buffer);
+	}
+
+	@Override
+	public void actionPerformed(@NotNull AnActionEvent e) {
+		String buffer = Messages.showInputDialog(
+			"Buffer name:",
+			"Detach from CodeMP Buffer",
+			Messages.getQuestionIcon());
+
+		try {
+			detach(buffer, false);
+		} catch(Exception ex) {
+			Messages.showErrorDialog(String.format(
+				"Failed to detach from buffer with name %s: %s!",
+				buffer, ex.getMessage()), "Detach from CodeMP Buffer");
+		}
+	}
+}

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

@@ -1,4 +1,4 @@
-package com.codemp.intellij.actions;
+package com.codemp.intellij.actions.workspace;
 
 import com.codemp.intellij.CodeMP;
 import com.codemp.intellij.jni.CodeMPHandler;
@@ -7,7 +7,7 @@ import com.codemp.intellij.jni.CursorHandler;
 import com.codemp.intellij.listeners.CursorEventListener;
 import com.codemp.intellij.util.ActionUtil;
 import com.codemp.intellij.util.ColorUtil;
-import com.intellij.openapi.Disposable;
+import com.codemp.intellij.util.DisposableRegistry;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import com.intellij.openapi.application.ApplicationManager;
@@ -25,18 +25,18 @@ import com.intellij.openapi.ui.Messages;
 import org.jetbrains.annotations.NotNull;
 
 import java.awt.*;
-import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
-public class JoinAction extends AnAction {
+public class WorkspaceJoinAction extends AnAction {
 
-	private static final Map<String, RangeHighlighter> highlighterMap = new HashMap<>();
+	private static final Map<String, RangeHighlighter> highlighterMap = new ConcurrentHashMap<>();
 
-	public static void join(AnActionEvent e, String session, boolean silent) throws Exception {
-		CursorHandler cursorHandler = CodeMPHandler.join(session);
+	public static void join(AnActionEvent e, String workspace, boolean silent) throws Exception {
+		CursorHandler cursorHandler = CodeMPHandler.join(workspace);
 
-		if(!silent) Messages.showInfoMessage(String.format("Joined session %s!", session), "CodeMP");
-		else CodeMP.LOGGER.debug("Joined session {}!", session);
+		if(!silent) Messages.showInfoMessage(String.format("Joined workspace %s!", workspace), "CodeMP");
+		else CodeMP.LOGGER.debug("Joined workspace {}!", workspace);
 
 		Editor editor = ActionUtil.getCurrentEditor(e);
 
@@ -49,7 +49,8 @@ public class JoinAction extends AnAction {
 
 		EditorFactory.getInstance()
 			.getEventMulticaster()
-			.addCaretListener(new CursorEventListener(), task);
+			.addCaretListener(new CursorEventListener(),
+				DisposableRegistry.getOrCreate(String.format("codemp-cursor-%s", workspace)));
 
 		ProgressManager.getInstance().run(task);
 	}
@@ -74,7 +75,7 @@ public class JoinAction extends AnAction {
 
 	//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 implements Disposable {
+	private static class CursorEventAwaiter extends Task.Backgroundable {
 
 		private final CursorHandler handler;
 		private final Editor editor;
@@ -85,9 +86,6 @@ public class JoinAction extends AnAction {
 			this.editor = editor;
 		}
 
-		@Override
-		public void dispose() {}
-
 		@Override
 		@SuppressWarnings("InfiniteLoopStatement")
 		public void run(@NotNull ProgressIndicator indicator) {

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

@@ -0,0 +1,33 @@
+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;
+import org.jetbrains.annotations.NotNull;
+
+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!");
+	}
+
+	@Override
+	public void actionPerformed(@NotNull AnActionEvent e) {
+		try {
+			leave(false);
+		} catch(Exception ex) {
+			Messages.showErrorDialog(String.format(
+				"Failed to leave workspace: %s!",
+				ex.getMessage()), "Leave CodeMP Workspace");
+		}
+	}
+}

src/main/java/com/codemp/intellij/exceptions/ide/BufferDetachException.java

@@ -0,0 +1,13 @@
+package com.codemp.intellij.exceptions.ide;
+
+import com.codemp.intellij.exceptions.CodeMPException;
+
+/**
+ * Thrown upon failure to detach from a buffer.
+ */
+public class BufferDetachException extends CodeMPException {
+
+	public BufferDetachException(String name) {
+		super(String.format("Could not detach from buffer named \"%s\"!", name));
+	}
+}

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

@@ -0,0 +1,66 @@
+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/resources/META-INF/plugin.xml

@@ -27,16 +27,24 @@
             <add-to-group group-id="ToolsMenu" anchor="first"/>
             <action id="codemp.fast-forward" class="com.codemp.intellij.actions.FastForwardAction" text="Just Hurry"/>
             <action id="codemp.connect" class="com.codemp.intellij.actions.ConnectAction" text="Connect..."/>
-            <action id="codemp.join" class="com.codemp.intellij.actions.JoinAction" text="Join..."/>
-            <group id="codemp.buffer" text="Buffer" popup="true">
-                <action id="codemp.buffer.create" class="com.codemp.intellij.actions.buffer.BufferCreateAction"
-                        text="Create Buffer"/>
-                <action id="codemp.buffer.create-with-content"
-                        class="com.codemp.intellij.actions.buffer.BufferCreateWithContentAction"
-                        text="Create Buffer with Content"/>
-                <action id="codemp.buffer.attach" class="com.codemp.intellij.actions.buffer.BufferAttachAction"
-                        text="Attach to Buffer"/>
-            </group>
+
+			<group id="codemp.workspace" text="Workspace" popup="true">
+				<action id="codemp.workspace.join" class="com.codemp.intellij.actions.workspace.WorkspaceJoinAction"
+						text="Join Workspace"/>
+				<action id="codemp.workspace.leave" class="com.codemp.intellij.actions.workspace.WorkspaceLeaveAction"
+						text="Leave Workspace"/>
+			</group>
+			<group id="codemp.buffer" text="Buffer" popup="true">
+				<action id="codemp.buffer.create" class="com.codemp.intellij.actions.buffer.BufferCreateAction"
+						text="Create Buffer"/>
+				<action id="codemp.buffer.create-with-content"
+						class="com.codemp.intellij.actions.buffer.BufferCreateWithContentAction"
+						text="Create Buffer with Content"/>
+				<action id="codemp.buffer.attach" class="com.codemp.intellij.actions.buffer.BufferAttachAction"
+						text="Attach to Buffer"/>
+				<action id="codemp.buffer.detach" class="com.codemp.intellij.actions.buffer.BufferDetachAction"
+						text="Detach from Buffer"/>
+			</group>
         </group>
 	</actions>
 
@@ -44,4 +52,4 @@
         <!-- Extension points defined by the plugin.
         Read more: https://plugins.jetbrains.com/docs/intellij/plugin-extension-points.html -->
     </extensions>
-</idea-plugin>
+</idea-plugin>

src/main/rust/error.rs

@@ -1,3 +1,4 @@
+use codemp::Error;
 use codemp::prelude::CodempError;
 
 pub struct ErrorWrapper(CodempError);
@@ -15,6 +16,7 @@ impl ErrorWrapper {
                 format!("Error {}: {}", status, message),
             CodempError::InvalidState { msg } => msg.to_string(),
             CodempError::Filler { message } => message.to_string(),
+					Error::Deadlocked => { "Error: deadlocked! (safe to retry)".to_string() }
             CodempError::Channel { send } => {
                 if *send {
                     "Error while sending message on channel: the channel was closed!".to_string()
@@ -22,6 +24,6 @@ impl ErrorWrapper {
                     "Error while reading message from channel: the channel was closed!".to_string()
                 }
             }
-        }
+				}
     }
-}
+}

src/main/rust/lib.rs

@@ -43,6 +43,11 @@ impl CodeMPHandler {
 		convert_buffer(CODEMP_INSTANCE.attach(&path))
 	}
 
+	#[generate_interface]
+	fn detach(path: String) -> Result<bool, String> {
+		convert(CODEMP_INSTANCE.disconnect_buffer(&path))
+	}
+
 	#[generate_interface]
 	fn get_cursor() -> Result<CursorHandler, String> {
 		convert_cursor(CODEMP_INSTANCE.get_cursor())
@@ -154,8 +159,8 @@ impl CursorHandler {
 	fn send(&self, buffer: String, start_row: i32, start_col: i32, end_row: i32, end_col: i32) -> Result<(), String> {
 		self.cursor.send(CodempCursorPosition {
 			buffer,
-			start: Some(CodempRowCol { row: start_row, col: start_col }),
-			end: Some(CodempRowCol { row: end_row, col: end_col })
+			start: CodempRowCol::wrap(start_row, start_col),
+			end: CodempRowCol::wrap(end_row, end_col)
 		}).map_err(|err| ErrorWrapper::from(err).get_error_message())
 	}
 }
@@ -205,20 +210,17 @@ impl BufferHandler {
 	fn recv(&self) -> Result<TextChangeWrapper, String> {
 		match self.buffer.blocking_recv(CODEMP_INSTANCE.rt()) {
 			Err(err) => Err(ErrorWrapper::from(err).get_error_message()),
-			Ok(change) => {
-				println!("test {:?}", change);
-				Ok(TextChangeWrapper {
-					start: change.span.start,
-					end: change.span.end,
-					content: change.content.clone()
-				})
-			}
+			Ok(change) => Ok(TextChangeWrapper {
+				start: change.span.start,
+				end: change.span.end,
+				content: change.content.clone()
+			})
 		}
 	}
 
 	#[generate_interface]
 	fn send(&self, start_offset: usize, end_offset: usize, content: String) -> Result<(), String> {
-		self.buffer.send(CodempTextChange { span: start_offset..end_offset, content, after: "".to_string() })
+		self.buffer.send(CodempTextChange { span: start_offset..end_offset, content })
 			.map_err(|err| ErrorWrapper::from(err).get_error_message())
 	}
 }