improvement: Better labels for workspace methods completions

Author: kasiaMarek

Diff for: presentation-compiler/src/main/dotty/tools/pc/completions/CompletionValue.scala

@@ -6,6 +6,7 @@ import scala.meta.internal.pc.CompletionItemData
 import dotty.tools.dotc.core.Contexts.Context
 import dotty.tools.dotc.core.Denotations.Denotation
 import dotty.tools.dotc.core.Flags.*
+import dotty.tools.dotc.core.StdNames.nme
 import dotty.tools.dotc.core.Symbols.Symbol
 import dotty.tools.dotc.core.Types.Type
 import dotty.tools.pc.printer.ShortenedTypePrinter
@@ -108,7 +109,7 @@ object CompletionValue:
         s"${label}${description(printer)}"
       else s"$label: ${description(printer)}"
 
-    private def labelWithSuffix(printer: ShortenedTypePrinter)(using Context): String =
+    protected def labelWithSuffix(printer: ShortenedTypePrinter)(using Context): String =
       if snippetSuffix.addLabelSnippet
       then
         val printedParams = symbol.info.typeParams.map(p =>
@@ -145,6 +146,11 @@ object CompletionValue:
     override def isFromWorkspace: Boolean = true
     override def completionItemDataKind: Integer = CompletionSource.WorkspaceKind.ordinal
 
+    override def labelWithDescription(printer: ShortenedTypePrinter)(using Context): String =
+      if symbol.is(Method) && symbol.name != nme.apply then
+        s"${labelWithSuffix(printer)} - ${printer.fullNameString(symbol.effectiveOwner)}"
+      else super.labelWithDescription(printer)
+
   /**
    * CompletionValue for old implicit classes methods via SymbolSearch
    */

Diff for: presentation-compiler/test/dotty/tools/pc/tests/completion/CompletionWorkspaceSuite.scala

@@ -768,8 +768,29 @@ class CompletionWorkspaceSuite extends BaseCompletionSuite:
          |  def main: Unit = incre@@
          |""".stripMargin,
       """|increment3: Int
-         |increment: Int
-         |increment2: Int
+         |increment - a: Int
+         |increment2 - a.c: Int
+         |""".stripMargin
+    )
+
+  @Test def `indent-method` =
+    check(
+      """|package a:
+         |  val y = 123
+         |  given intGiven: Int = 123
+         |  type Alpha = String
+         |  class Foo(x: Int)
+         |  object X:
+         |    val x = 123
+         |  def fooBar(x: Int) = x + 1
+         |  package b:
+         |    def fooBar(x: String) = x.length
+         |
+         |package c:
+         |  def main() = foo@@
+         |""".stripMargin,
+      """|fooBar - a(x: Int): Int
+         |fooBar - a.b(x: String): Int
          |""".stripMargin
     )
 
@@ -848,5 +869,21 @@ class CompletionWorkspaceSuite extends BaseCompletionSuite:
          |  }
          |}
          |""".stripMargin,
-      filter = _.contains("mmmm(x: Int)")
+      filter = _.contains("mmmm - demo.O")
+    )
+
+  @Test def `method-label` =
+    check(
+      """|package demo
+         |
+         |object O {
+         | def method(i: Int): Int = i + 1
+         |}
+         |
+         |object Main {
+         |  val x = meth@@
+         |}
+         |""".stripMargin,
+      """|method - demo.O(i: Int): Int
+         |""".stripMargin
     )