Repl: refactoring, move common parts to utils

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/repl/replUtil.kt

@@ -17,9 +17,35 @@
 package org.jetbrains.kotlin.cli.common.repl
 
 import com.google.common.base.Throwables
+import com.intellij.openapi.util.text.StringUtil
+import com.intellij.util.LineSeparator
+import org.jetbrains.kotlin.utils.repl.ReplEscapeType
 import java.io.File
 import java.net.URLClassLoader
 
+// using '#' to avoid collisions with xml escaping
+private val SOURCE_CHARS: List<String> = listOf("\n", "#")
+private val XML_REPLACEMENTS: List<String> = listOf("#n", "#diez")
+
+private val END_LINE: String = LineSeparator.getSystemLineSeparator().separatorString
+private const val XML_PREAMBLE = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+
+fun String.replUnescapeLineBreaks() = StringUtil.replace(this, XML_REPLACEMENTS, SOURCE_CHARS)
+fun String.replEscapeLineBreaks() = StringUtil.replace(this, SOURCE_CHARS, XML_REPLACEMENTS)
+
+fun String.replOutputAsXml(escapeType: ReplEscapeType): String {
+    val escapedXml = StringUtil.escapeXml(replEscapeLineBreaks())
+    return "$XML_PREAMBLE<output type=\"$escapeType\">$escapedXml</output>"
+}
+
+fun String.replInputAsXml(): String {
+    val escapedXml = StringUtil.escapeXml(replEscapeLineBreaks())
+    return "$XML_PREAMBLE<input>$escapedXml</input>"
+}
+
+fun String.replAddLineBreak() = this + END_LINE
+fun String.replRemoveLineBreaksInTheEnd() = trimEnd(*END_LINE.toCharArray())
+
 fun makeScriptBaseName(codeLine: ReplCodeLine) =
         "Line_${codeLine.no}${if (codeLine.generation > REPL_CODE_LINE_FIRST_GEN) "_gen_${codeLine.generation}" else ""}"