Platform header IDE annotation: do not report suppressed error #KT-15601 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/highlighter/PlatformHeaderAnnotator.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.idea.highlighter
 import com.intellij.lang.annotation.AnnotationHolder
 import com.intellij.lang.annotation.Annotator
 import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.caches.resolve.KotlinCacheService
 import org.jetbrains.kotlin.descriptors.MemberDescriptor
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.PlatformKind
@@ -67,6 +68,10 @@ class PlatformHeaderAnnotator : Annotator {
             checker.checkHeaderDeclarationHasImplementation(declaration, descriptor, diagnosticSink, checkImpl = false)
         }
 
-        return if (diagnosticList.isNotEmpty()) SimpleDiagnostics(diagnosticList) else Diagnostics.EMPTY
+        val suppressionCache = KotlinCacheService.getInstance(declaration.project).getSuppressionCache()
+        val filteredList = diagnosticList.filter {
+            !suppressionCache.isSuppressed(declaration, it.factory.name, it.severity)
+        }
+        return if (filteredList.isNotEmpty()) SimpleDiagnostics(filteredList) else Diagnostics.EMPTY
     }
 }

idea/testData/multiModuleHighlighting/platformSuppress/header/header.kt

@@ -0,0 +1,7 @@
+// See KT-15601
+
+@Suppress("HEADER_WITHOUT_IMPLEMENTATION")
+header interface Event
+
+@Suppress("SOMETHING_WRONG")
+header class <error descr="[HEADER_WITHOUT_IMPLEMENTATION] Header declaration 'Wrong' has no implementation in module for JVM">Wrong</error>

idea/tests/org/jetbrains/kotlin/idea/caches/resolve/MultiModuleHighlightingTest.kt

@@ -124,4 +124,16 @@ class MultiModuleHighlightingTest : AbstractMultiModuleHighlightingTest() {
 
         checkHighlightingInAllFiles()
     }
+
+    fun testPlatformSuppress() {
+        val header = module("header")
+        header.setPlatformKind(TargetPlatformKind.Common)
+
+        val jvm = module("jvm")
+        jvm.setPlatformKind(TargetPlatformKind.Jvm.JVM_1_6)
+        jvm.enableMultiPlatform()
+        jvm.addDependency(header)
+
+        checkHighlightingInAllFiles()
+    }
 }