InlayHints: change presentation before emit event

GitOrigin-RevId: 2503e52e854d12f966468e2f450b0a401faf887f

platform/lang-impl/src/com/intellij/codeInsight/hints/InlayHintsSinkImpl.kt

@@ -117,10 +117,10 @@ class InlayHintsSinkImpl<T>(val key: SettingsKey<T>) : InlayHintsSink {
         val previousPresentation = renderer.presentation
         @Suppress("UNCHECKED_CAST")
         newPresentation.addListener(InlayListener(inlay as Inlay<PresentationRenderer>))
+        renderer.presentation = newPresentation
         if (newPresentation.updateState(previousPresentation)) {
           newPresentation.fireUpdateEvent(previousPresentation.dimension())
         }
-        renderer.presentation = newPresentation
         hints.remove(offset)
       }
     }

platform/lang-impl/testSources/com/intellij/codeInsight/hints/PresentationTest.kt

@@ -126,7 +126,7 @@ class HeavyPresentationTest : LightPlatformCodeInsightFixtureTestCase() {
   }
 
   fun testFoldedStateIsNotUpdatedAndStatelessComponentIsUpdated() {
-    val factory = PresentationFactory(myFixture.editor as EditorImpl)
+    val factory = getFactory()
 
     val old = unwrapFolding(factory.folding(factory.smallText("outerPlaceholder")) {
       unwrapFolding(factory.folding(factory.smallText("innerPlaceholder")) {factory.smallText("text")})
@@ -142,8 +142,7 @@ class HeavyPresentationTest : LightPlatformCodeInsightFixtureTestCase() {
   }
 
   fun testFoldedBiState() {
-    val factory = PresentationFactory(myFixture.editor as EditorImpl)
-    with(factory) {
+    with(getFactory()) {
       val inner = collapsible(
         prefix = smallText("("),
         collapsed = smallText("???"),
@@ -179,6 +178,18 @@ class HeavyPresentationTest : LightPlatformCodeInsightFixtureTestCase() {
     }
   }
 
+  fun testSeqSmallTextChangesWidth() {
+    with(getFactory()) {
+      val initial = roundWithBackground(seq(smallText(": "), smallText("number")))
+      val final = roundWithBackground(seq(smallText(": "), smallText("void")))
+      val requiresUpdate = final.updateState(initial)
+      assertTrue(requiresUpdate)
+      assertTrue(initial.width != final.width)
+    }
+  }
+
+  private fun getFactory() = PresentationFactory(myFixture.editor as EditorImpl)
+
   private fun unwrapFolding(presentation: InlayPresentation): InlayPresentation {
     presentation as ChangeOnClickPresentation
     presentation.state = ChangeOnClickPresentation.State(true)