Abstract class icon added (KT-7810)

#KT-7810 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/KotlinDescriptorIconProvider.java

@@ -99,7 +99,8 @@ public final class KotlinDescriptorIconProvider {
             }
         }
         if (descriptor instanceof ClassDescriptor) {
-            switch (((ClassDescriptor) descriptor).getKind()) {
+            ClassDescriptor classDescriptor = (ClassDescriptor) descriptor;
+            switch (classDescriptor.getKind()) {
                 case INTERFACE:
                     return KotlinIcons.INTERFACE;
                 case ENUM_CLASS:
@@ -111,7 +112,9 @@ public final class KotlinDescriptorIconProvider {
                 case OBJECT:
                     return KotlinIcons.OBJECT;
                 case CLASS:
-                    return KotlinIcons.CLASS;
+                    return Modality.ABSTRACT == classDescriptor.getModality() ?
+                           KotlinIcons.ABSTRACT_CLASS :
+                           KotlinIcons.CLASS;
                 default:
                     LOG.warn("No icon for descriptor: " + descriptor);
                     return null;

idea/idea-analysis/src/org/jetbrains/kotlin/idea/KotlinIconProvider.kt

@@ -29,6 +29,7 @@ import org.jetbrains.kotlin.idea.caches.resolve.lightClasses.KtLightClassForDeco
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
+import org.jetbrains.kotlin.psi.psiUtil.isAbstract
 import javax.swing.Icon
 
 class KotlinIconProvider : IconProvider(), DumbAware {
@@ -104,7 +105,7 @@ class KotlinIconProvider : IconProvider(), DumbAware {
                 isEnum() -> KotlinIcons.ENUM
                 isAnnotation() -> KotlinIcons.ANNOTATION
                 this is KtEnumEntry && getPrimaryConstructorParameterList() == null -> KotlinIcons.ENUM
-                else -> KotlinIcons.CLASS
+                else -> if (isAbstract()) KotlinIcons.ABSTRACT_CLASS else KotlinIcons.CLASS
             }
             is KtObjectDeclaration -> KotlinIcons.OBJECT
             is KtParameter -> {

idea/idea-analysis/src/org/jetbrains/kotlin/idea/KotlinIcons.java

@@ -28,6 +28,7 @@ public interface KotlinIcons {
     Icon SMALL_LOGO_13 = IconLoader.getIcon("/org/jetbrains/kotlin/idea/icons/kotlin13.png");
 
     Icon CLASS = IconLoader.getIcon("/org/jetbrains/kotlin/idea/icons/classKotlin.png");
+    Icon ABSTRACT_CLASS = IconLoader.getIcon("/org/jetbrains/kotlin/idea/icons/abstractClassKotlin.png");
     Icon ENUM = IconLoader.getIcon("/org/jetbrains/kotlin/idea/icons/enumKotlin.png");
     Icon FILE = IconLoader.getIcon("/org/jetbrains/kotlin/idea/icons/kotlin_file.png");
     Icon ACTIVITY = IconLoader.getIcon("/org/jetbrains/kotlin/idea/icons/kotlin_activity.png");