fix(KT-52339): add newlines to SourceMap to calculate multiline comments in a right way.

js/js.ast/src/org/jetbrains/kotlin/js/backend/JsToStringGenerationVisitor.java

@@ -4,6 +4,8 @@
 
 package org.jetbrains.kotlin.js.backend;
 
+import com.intellij.openapi.util.text.StringUtil;
+import kotlin.text.StringsKt;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.js.backend.ast.*;
 import org.jetbrains.kotlin.js.backend.ast.JsDoubleLiteral;
@@ -1140,8 +1142,16 @@ public class JsToStringGenerationVisitor extends JsVisitor {
 
     @Override
     public void visitMultiLineComment(@NotNull JsMultiLineComment comment) {
+        List<String> lines = StringsKt.lines(comment.getText());
+
         p.print("/*");
-        p.print(comment.getText());
+        p.print(lines.get(0).trim());
+
+        for (int i = 1; i < lines.size(); i++) {
+            newline();
+            p.print(lines.get(i).trim());
+        }
+
         p.print("*/");
         needSemi = false;
         newline();

js/js.parser/src/com/google/gwt/dev/js/rhino/Parser.java

@@ -702,7 +702,10 @@ public class Parser {
                 break;
             }
         }
-        ts.matchToken(TokenStream.SEMI);
+
+        if (pn.type != TokenStream.SINGLE_LINE_COMMENT && pn.type != TokenStream.MULTI_LINE_COMMENT) {
+            ts.matchToken(TokenStream.SEMI);
+        }
 
         return pn;
     }

js/js.tests/test/org/jetbrains/kotlin/js/testOld/utils/DirectiveTestUtils.java

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.js.testOld.utils;
 
 import com.intellij.openapi.util.text.StringUtil;
+import kotlin.text.StringsKt;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.js.backend.ast.*;
@@ -308,14 +309,14 @@ public class DirectiveTestUtils {
             return isMultiLine ? new RecursiveJsVisitor() {
                 @Override
                 public void visitMultiLineComment(@NotNull JsMultiLineComment comment) {
-                    if (comment.getText().trim().equals(text)) {
+                    if (isTheSameText(comment.getText(), text)) {
                         setElementExists(true);
                     }
                 }
             } : new RecursiveJsVisitor() {
                 @Override
                 public void visitSingleLineComment(@NotNull JsSingleLineComment comment) {
-                    if (comment.getText().trim().equals(text)) {
+                    if (isTheSameText(comment.getText(), text)) {
                         setElementExists(true);
                     }
                 }
@@ -324,9 +325,22 @@ public class DirectiveTestUtils {
 
         @Override
         protected void loadArguments(@NotNull ArgumentsHelper arguments) {
-            this.text = arguments.findNamedArgument("text");
+            this.text = arguments.findNamedArgument("text").replace("\\n", System.lineSeparator());
             this.isMultiLine = Boolean.parseBoolean(arguments.findNamedArgument("multiline"));
         }
+
+        private boolean isTheSameText(String str1, String str2) {
+            List<String> lines1 = StringsKt.lines(str1);
+            List<String> lines2 = StringsKt.lines(str2);
+
+            if (lines1.size() != lines2.size()) return false;
+
+            for (int i = 0; i < lines1.size(); i++) {
+                if (!lines1.get(i).trim().equals(lines2.get(i).trim())) return false;
+            }
+            
+            return true;
+        }
     };
 
     private static final DirectiveHandler CHECK_COMMENT_DOESNT_EXIST = new NodeExistenceDirective("CHECK_COMMENT_DOESNT_EXIST", false) {
@@ -531,10 +545,6 @@ public class DirectiveTestUtils {
         return node;
     }
 
-    public static void checkCommentExists(JsNode node, String content, boolean isMultiline) {
-
-    }
-
     public static void checkPropertyNotUsed(JsNode node, String propertyName, String scope, boolean isGetAllowed, boolean isSetAllowed)
             throws Exception {
         PropertyReferenceCollector counter = PropertyReferenceCollector.Companion.collect(findScope(node, scope));

js/js.translator/testData/box/jsCode/comments.kt

@@ -1,18 +1,28 @@
 // EXPECTED_REACHABLE_NODES: 1282
 // CHECK_COMMENT_EXISTS: text="Single line comment" multiline=false
+// CHECK_COMMENT_EXISTS: text="Second single line comment" multiline=false
+// CHECK_COMMENT_EXISTS: text="Third single line comment" multiline=false
+// CHECK_COMMENT_EXISTS: text="Forth single line comment" multiline=false
 // CHECK_COMMENT_EXISTS: text="Multi line comment" multiline=true
 // CHECK_COMMENT_EXISTS: text="Single line comment inside function" multiline=false
 // CHECK_COMMENT_EXISTS: text="Multi line comment inside function" multiline=true
 // CHECK_COMMENT_EXISTS: text="After call single line comment" multiline=false
 // CHECK_COMMENT_EXISTS: text="After call multi line comment" multiline=true
+// CHECK_COMMENT_EXISTS: text="The header multiline\ncomment" multiline=true
 // CHECK_COMMENT_DOESNT_EXIST: text="random position comment 1" multiline=true
 // CHECK_COMMENT_DOESNT_EXIST: text="random position comment 2" multiline=true
 // CHECK_COMMENT_DOESNT_EXIST: text="random position comment 3" multiline=true
+// CHECK_COMMENT_EXISTS: text="1Multi line comment\n" multiline=true
+// CHECK_COMMENT_EXISTS: text="2Multi line comment\n\n\n" multiline=true
+// CHECK_COMMENT_EXISTS: text="3Multi line\n\n\n\n\ncomment\n" multiline=true
+// CHECK_COMMENT_EXISTS: text="" multiline=true
 
 package foo
 
 fun box(): String {
     js("""
+        /* The header multiline
+        comment */
         function foo() {
             // Single line comment inside function
             Object;
@@ -20,7 +30,10 @@ fun box(): String {
         }
         
         // Single line comment
+        // Second single line comment
         foo();
+        // Third single line comment
+        // Forth single line comment
         
         /* Multi line comment */
         foo();
@@ -30,6 +43,26 @@ fun box(): String {
         foo(); /* After call multi line comment */
         
         var /*random position comment 1*/ c /*random position comment 2*/ = /*random position comment 3*/ "Random position";
+        
+        /* 1Multi line comment 
+        */
+        foo();
+        /* 2Multi line comment 
+
+
+        */
+        foo();
+        /* 3Multi line
+
+
+        
+        
+        comment 
+        */
+        foo();
+        
+        /**/
+        foo();
     """)
     return "OK"
 }