gistfile1.txt

commit 3f09ac8e6c921586b4dc8949b25ce4759f064776
Author: Olafur Pall Geirsson <lgeirsson@twitter.com>
Date:   Thu Oct 10 12:44:44 2019 +0200

    Experiment with debugging breakpoints

diff --git a/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProtocol.scala b/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProtocol.scala
index 4736d6e..04f9e28 100644
--- a/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProtocol.scala
+++ b/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProtocol.scala
@@ -6,10 +6,24 @@ import org.eclipse.lsp4j.jsonrpc.messages.NotificationMessage
 import org.eclipse.lsp4j.jsonrpc.messages.RequestMessage
 
 import scala.util.Success
+import org.eclipse.lsp4j.debug.SetBreakpointsArguments
 
 private[debug] object DebugProtocol {
   import scala.meta.internal.metals.JsonParser._
 
+  object SetBreakpoints {
+    def unapply(request: RequestMessage): Option[SetBreakpointsArguments] = {
+      if (request.getMethod != "setBreakpoints") None
+      else {
+        request.getParams match {
+          case json: JsonElement =>
+            json.as[SetBreakpointsArguments].toOption
+          case _ => None
+        }
+      }
+    }
+  }
+
   object RestartRequest {
     def unapply(request: RequestMessage): Option[RequestMessage] = {
       if (request.getMethod != "disconnect") None
diff --git a/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProxy.scala b/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProxy.scala
index e0e29a0..47bd260 100644
--- a/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProxy.scala
+++ b/metals/src/main/scala/scala/meta/internal/metals/debug/DebugProxy.scala
@@ -6,10 +6,14 @@ import org.eclipse.lsp4j.jsonrpc.MessageConsumer
 import scala.concurrent.Promise
 import scala.concurrent.ExecutionContext
 import scala.concurrent.Future
+import scala.meta.internal.tvp.EnclosingClasses
 import scala.meta.internal.metals.Cancelable
 import scala.meta.internal.metals.debug.DebugProtocol.OutputNotification
 import scala.meta.internal.metals.debug.DebugProtocol.RestartRequest
 import scala.meta.internal.metals.debug.DebugProxy._
+import scala.meta.internal.metals.debug.DebugProtocol.SetBreakpoints
+import scala.meta.internal.metals.MetalsEnrichments._
+import java.util.concurrent.CompletableFuture
 
 private[debug] final class DebugProxy(
     sessionName: String,
@@ -38,6 +42,18 @@ private[debug] final class DebugProxy(
 
   private val handleClientMessage: MessageConsumer = {
     case _ if cancelled.get() =>
+    case params @ SetBreakpoints(message) =>
+      for {
+        source <- message.getSource().getSources()
+        // _ = source.
+        input = source.getPath().toAbsolutePath.toInput
+        // pos = source.get
+        // occ <- EnclosingClasses.closestClass(input)
+      } {
+        // source.setAdapterData(occ.symbol)
+      }
+      // message.setSource()
+      server.consume(params)
     // ignore
     case RestartRequest(message) =>
       // set the status first, since the server can kill the connection
diff --git a/metals/src/main/scala/scala/meta/internal/tvp/EnclosingClasses.scala b/metals/src/main/scala/scala/meta/internal/tvp/EnclosingClasses.scala
new file mode 100644
index 0000000..18e94a9
--- /dev/null
+++ b/metals/src/main/scala/scala/meta/internal/tvp/EnclosingClasses.scala
@@ -0,0 +1,27 @@
+package scala.meta.internal.tvp
+
+import scala.meta.internal.semanticdb.SymbolOccurrence
+import scala.meta.inputs.Input
+import scala.meta.internal.mtags.Mtags
+import scala.meta.internal.semanticdb.Scala._
+import org.eclipse.lsp4j.Position
+
+object EnclosingClasses {
+  def closestClass(
+      input: Input.VirtualFile,
+      pos: Position
+  ): Option[SymbolOccurrence] = {
+    val occurrences =
+      Mtags.allToplevels(input).occurrences.filterNot(_.symbol.isPackage)
+    if (occurrences.isEmpty) None
+    else {
+      val closestSymbol = occurrences.minBy { occ =>
+        val startLine = occ.range.fold(Int.MaxValue)(_.startLine)
+        val distance = math.abs(pos.getLine - startLine)
+        val isLeading = pos.getLine() > startLine
+        (!isLeading, distance)
+      }
+      Some(closestSymbol)
+    }
+  }
+}
diff --git a/metals/src/main/scala/scala/meta/internal/tvp/MetalsTreeViewProvider.scala b/metals/src/main/scala/scala/meta/internal/tvp/MetalsTreeViewProvider.scala
index 4d04482..fccdb7d 100644
--- a/metals/src/main/scala/scala/meta/internal/tvp/MetalsTreeViewProvider.scala
+++ b/metals/src/main/scala/scala/meta/internal/tvp/MetalsTreeViewProvider.scala
@@ -254,14 +254,7 @@ class MetalsTreeViewProvider(
     val input = path.toInput
     val occurrences =
       Mtags.allToplevels(input).occurrences.filterNot(_.symbol.isPackage)
-    if (occurrences.isEmpty) None
-    else {
-      val closestSymbol = occurrences.minBy { occ =>
-        val startLine = occ.range.fold(Int.MaxValue)(_.startLine)
-        val distance = math.abs(pos.getLine - startLine)
-        val isLeading = pos.getLine() > startLine
-        (!isLeading, distance)
-      }
+    EnclosingClasses.closestClass(input, pos).flatMap { closestSymbol =>
       val result =
         if (path.isDependencySource(workspace())) {
           buildTargets
@@ -294,12 +287,11 @@ class MetalsTreeViewProvider(
     for {
       compilation <- compilations().get(id)
       info <- buildTargets.info(id)
-    } yield
-      TreeViewNode(
-        Compile,
-        id.getUri,
-        s"${info.getDisplayName()} - ${compilation.timer.toStringSeconds} (${compilation.progressPercentage}%)"
-      )
+    } yield TreeViewNode(
+      Compile,
+      id.getUri,
+      s"${info.getDisplayName()} - ${compilation.timer.toStringSeconds} (${compilation.progressPercentage}%)"
+    )
   }
 
   private def ongoingCompilationNode: TreeViewNode = {