Push Down: Support moving members from Java to Kotlin class

#KT-9485 Fixed

idea/testData/refactoring/pushDown/j2k/fromClass.1.kt

@@ -0,0 +1 @@
+class K : A()

idea/testData/refactoring/pushDown/j2k/fromClass.1.kt.after

@@ -0,0 +1,28 @@
+abstract class K : A() {
+    // INFO: {"checked": "true"}
+    var x = 2 * 3
+
+    // INFO: {"checked": "true"}
+    internal inner class X
+
+    // INFO: {"checked": "true"}
+    internal class Y
+
+    // INFO: {"checked": "true"}
+    fun foo(n: Int): Boolean {
+        return n > 0
+    }
+
+    // INFO: {"checked": "true"}
+    internal abstract fun bar(s: String): Int
+
+    companion object {
+        // INFO: {"checked": "true"}
+        var X = "1" + "2"
+
+        // INFO: {"checked": "true"}
+        fun foo2(n: Int): String {
+            return "_" + n + "_"
+        }
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromClass.java

@@ -0,0 +1,29 @@
+abstract class <caret>A {
+    // INFO: {"checked": "true"}
+    int x = 2 * 3;
+    // INFO: {"checked": "true"}
+    static String X = "1" + "2";
+
+    // INFO: {"checked": "true"}
+    boolean foo(int n) {
+        return n > 0;
+    }
+
+    // INFO: {"checked": "true"}
+    static String foo2(int n) {
+        return "_" + n + "_";
+    }
+
+    // INFO: {"checked": "true"}
+    abstract int bar(String s);
+
+    // INFO: {"checked": "true"}
+    class X {
+
+    }
+
+    // INFO: {"checked": "true"}
+    static class Y {
+
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromClass.java.after

@@ -0,0 +1,3 @@
+abstract class A {
+
+}

idea/testData/refactoring/pushDown/j2k/fromClassAndMakeAbstract.1.kt

@@ -0,0 +1 @@
+class K : A()

idea/testData/refactoring/pushDown/j2k/fromClassAndMakeAbstract.1.kt.after

@@ -0,0 +1,28 @@
+abstract class K : A() {
+    // INFO: {"checked": "true"}
+    var x = 2 * 3
+
+    // INFO: {"checked": "true"}
+    internal inner class X
+
+    // INFO: {"checked": "true"}
+    internal class Y
+
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    override fun foo(n: Int): Boolean {
+        return n > 0
+    }
+
+    // INFO: {"checked": "true"}
+    internal abstract fun bar(s: String): Int
+
+    companion object {
+        // INFO: {"checked": "true"}
+        var X = "1" + "2"
+
+        // INFO: {"checked": "true"}
+        fun foo2(n: Int): String {
+            return "_" + n + "_"
+        }
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromClassAndMakeAbstract.java

@@ -0,0 +1,29 @@
+abstract class <caret>A {
+    // INFO: {"checked": "true"}
+    int x = 2 * 3;
+    // INFO: {"checked": "true"}
+    static String X = "1" + "2";
+
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    boolean foo(int n) {
+        return n > 0;
+    }
+
+    // INFO: {"checked": "true"}
+    static String foo2(int n) {
+        return "_" + n + "_";
+    }
+
+    // INFO: {"checked": "true"}
+    abstract int bar(String s);
+
+    // INFO: {"checked": "true"}
+    class X {
+
+    }
+
+    // INFO: {"checked": "true"}
+    static class Y {
+
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromClassAndMakeAbstract.java.after

@@ -0,0 +1,6 @@
+abstract class A {
+
+    // INFO: {"checked": "true", "toAbstract": "true"}
+    abstract boolean foo(int n);
+
+}

idea/testData/refactoring/pushDown/j2k/fromClassUsageConflicts.1.kt

@@ -0,0 +1,10 @@
+class K : A()
+
+fun test(a: A) {
+    val t1 = a.x
+    a.x = t1 + 1
+    val t2 = A.X
+    a.foo(1)
+    A.foo2(2)
+    A.Y()
+}

idea/testData/refactoring/pushDown/j2k/fromClassUsageConflicts.java

@@ -0,0 +1,29 @@
+abstract class <caret>A {
+    // INFO: {"checked": "true"}
+    int x = 2 * 3;
+    // INFO: {"checked": "true"}
+    static String X = "1" + "2";
+
+    // INFO: {"checked": "true"}
+    boolean foo(int n) {
+        return n > 0;
+    }
+
+    // INFO: {"checked": "true"}
+    static String foo2(int n) {
+        return "_" + n + "_";
+    }
+
+    // INFO: {"checked": "true"}
+    abstract int bar(String s);
+
+    // INFO: {"checked": "true"}
+    class X {
+
+    }
+
+    // INFO: {"checked": "true"}
+    static class Y {
+
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromClassUsageConflicts.java.messages

@@ -0,0 +1,3 @@
+Pushed member won't be available in 'foo(1)'
+Pushed member won't be available in 'x'
+Pushed member won't be available in 'x'

idea/testData/refactoring/pushDown/j2k/fromInterface.1.kt

@@ -0,0 +1,3 @@
+class K : I
+
+interface IK: I

idea/testData/refactoring/pushDown/j2k/fromInterface.1.kt.after

@@ -0,0 +1,25 @@
+abstract class K : I {
+    // INFO: {"checked": "true"}
+    class X
+
+    // INFO: {"checked": "true"}
+    abstract fun bar(s: String): Int
+
+    companion object {
+        // INFO: {"checked": "true"}
+        val x = 2 * 3
+    }
+}
+
+interface IK: I {
+    // INFO: {"checked": "true"}
+    class X
+
+    // INFO: {"checked": "true"}
+    fun bar(s: String): Int
+
+    companion object {
+        // INFO: {"checked": "true"}
+        val x = 2 * 3
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromInterface.java

@@ -0,0 +1,12 @@
+interface <caret>I {
+    // INFO: {"checked": "true"}
+    int x = 2 * 3;
+
+    // INFO: {"checked": "true"}
+    int bar(String s);
+
+    // INFO: {"checked": "true"}
+    class X {
+
+    }
+}

idea/testData/refactoring/pushDown/j2k/fromInterface.java.after

@@ -0,0 +1,3 @@
+interface I {
+
+}