[cli-repl] More accurate line breaks handling

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/repl/messages/ReplSystemInWrapper.kt

@@ -54,11 +54,11 @@ public class ReplSystemInWrapper(
 
             byteBuilder.write(stdin.read())
 
-            if (byteBuilder.toString().endsWith(END_LINE)) {
+            if (byteBuilder.toString().endsWith('\n')) {
                 isXmlIncomplete = false
                 isLastByteProcessed = false
 
-                inputByteArray = unescapedInput().toByteArray()
+                inputByteArray = parseInput().toByteArray()
             }
         }
 
@@ -67,16 +67,9 @@ public class ReplSystemInWrapper(
         return nextByte
     }
 
-    private fun unescapedInput(): String {
+    private fun parseInput(): String {
         val xmlInput = byteBuilder.toString()
-        val unescapedXml = parseXml(xmlInput)
-
-        val inputMessage = if (isReplScriptExecuting)
-            IdeLinebreaksUnescaper.unescapeFromDiez(unescapedXml)
-        else
-            "$unescapedXml$END_LINE"
-
-        return inputMessage
+        return "${parseXml(xmlInput)}$END_LINE"
     }
 
     private fun resetBufferIfNeeded() {

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/repl/messages/ReplSystemOutWrapper.kt

@@ -17,11 +17,11 @@
 package org.jetbrains.kotlin.cli.jvm.repl.messages
 
 import com.intellij.openapi.util.text.StringUtil
+import com.intellij.util.LineSeparator
 import java.io.PrintStream
 
-public val END_LINE: String = "\n"
-
-private val XML_PREAMBLE = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+val END_LINE: String = LineSeparator.getSystemLineSeparator().separatorString
+val XML_PREAMBLE = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
 
 public class ReplSystemOutWrapper(private val ideMode: Boolean, standardOut: PrintStream) : PrintStream(standardOut, true) {
     private enum class EscapeType {
@@ -46,7 +46,7 @@ public class ReplSystemOutWrapper(private val ideMode: Boolean, standardOut: Pri
     override fun print(x: String) = printWithEscaping(x)
     override fun print(x: Any?) = printWithEscaping(x.toString())
 
-    private fun printlnWithEscaping(text: String, escapeType: EscapeType = EscapeType.USER_OUTPUT) = printWithEscaping("$text$END_LINE", escapeType)
+    private fun printlnWithEscaping(text: String, escapeType: EscapeType = EscapeType.USER_OUTPUT) = printWithEscaping("$text\n", escapeType)
 
     private fun printWithEscaping(text: String, escapeType: EscapeType = EscapeType.USER_OUTPUT) {
         if (ideMode)

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/repl/messages/UnescapeUtils.kt

@@ -34,9 +34,5 @@ fun parseXml(inputMessage: String): String {
     val input = docBuilder.parse(strToSource(inputMessage))
 
     val root = input.firstChild as Element
-    return root.textContent
-}
-
-public object IdeLinebreaksUnescaper {
-    @JvmStatic fun unescapeFromDiez(inputMessage: String) = StringUtil.replace(inputMessage, XML_REPLACEMENTS, SOURCE_CHARS)
+    return StringUtil.replace(root.textContent, XML_REPLACEMENTS, SOURCE_CHARS)
 }

idea/idea-repl/src/org/jetbrains/kotlin/console/KotlinConsoleExecutor.kt

@@ -50,7 +50,7 @@ public class KotlinConsoleExecutor(
         val xmlRes = "$XML_PREAMBLE" +
                      "<input>" +
                      "${StringUtil.escapeXml(
-                             StringUtil.replace("$command\n", SOURCE_CHARS, XML_REPLACEMENTS)
+                             StringUtil.replace(command, SOURCE_CHARS, XML_REPLACEMENTS)
                      )}" +
                      "</input>"