Better indent in multi-line strings (KT-17849)

Inspired by MultilineStringEnterHandler from https://github.com/JetBrains/intellij-scala
https://github.com/JetBrains/intellij-scala/blob/edb741f344afff063197b406ca0c7c266a26c436/src/org/jetbrains/plugins/scala/editor/enterHandler/MultilineStringEnterHandler.scala

 #KT-17849 Fixed

idea/testData/editor/enterHandler/multilineString/spaces/dontAddMarginCharWhenMultilineWithoutMargins.kt

@@ -0,0 +1,12 @@
+val a =
+   """bl<caret>ah blah blah
+       blah blah blah
+         blah blah blah
+   """.trimMargin()
+//-----
+val a =
+   """bl
+       <caret>ah blah blah
+       blah blah blah
+         blah blah blah
+   """.trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/dontAddMarginWhenItIsUnused.kt

@@ -0,0 +1,14 @@
+val a =
+    """
+blah blah blah
+ blah blah blah
+   blah blah blah<caret>
+    """.trimMargin()
+//-----
+val a =
+    """
+blah blah blah
+ blah blah blah
+   blah blah blah
+   <caret>
+    """.trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/dontAddMarginWhenItIsUnusedWithEmptyPrevious.kt

@@ -0,0 +1,16 @@
+val a =
+    """
+blah blah blah
+ blah blah blah
+   blah blah blah
+   <caret>
+    """.trimMargin()
+//-----
+val a =
+    """
+blah blah blah
+ blah blah blah
+   blah blah blah
+
+   <caret>
+    """.trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/dontAddTrimCallWhenAlreadyMultiline.kt

@@ -0,0 +1,14 @@
+val a =
+    """
+blah blah blah
+ blah blah blah
+   blah blah blah<caret>
+    """
+//-----
+val a =
+    """
+blah blah blah
+ blah blah blah
+   blah blah blah
+   <caret>
+    """

idea/testData/editor/enterHandler/multilineString/spaces/dontAddTrimCallWhenAlreadyMultilineFirstLine.kt

@@ -0,0 +1,12 @@
+val a =
+   """bl<caret>ah blah blah
+       blah blah blah
+         blah blah blah
+   """
+//-----
+val a =
+   """bl
+       <caret>ah blah blah
+       blah blah blah
+         blah blah blah
+   """

idea/testData/editor/enterHandler/multilineString/spaces/dontInsertTrimMargin1.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>""".trimMargin()
+//-----
+val a = """blah blah
+    |<caret>
+""".trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/dontInsertTrimMargin2.kt

@@ -0,0 +1,5 @@
+val a = """blah blah blah<caret>""".replace(" ", "")?.replace("b", "p").trimMargin().length
+//-----
+val a = """blah blah blah
+    |<caret>
+""".replace(" ", "")?.replace("b", "p").trimMargin().length

idea/testData/editor/enterHandler/multilineString/spaces/dontInsertTrimMargin3.kt

@@ -0,0 +1,17 @@
+val a =
+  ("""
+      |  blah blah
+      |  blah blah
+   """ + """<caret>""").trimMargin()
+
+// TODO: Concatenation is not supported
+//-----
+val a =
+  ("""
+      |  blah blah
+      |  blah blah
+   """ + """
+       <caret>
+   """.trimIndent()).trimMargin()
+
+// TODO: Concatenation is not supported

idea/testData/editor/enterHandler/multilineString/spaces/dontInsertTrimMargin4.kt

@@ -0,0 +1,5 @@
+val a = """blah blah blah<caret>""".replace(" ", "")?.replace("b", "p").trimIndent().length
+//-----
+val a = """blah blah blah
+    <caret>
+""".replace(" ", "")?.replace("b", "p").trimIndent().length

idea/testData/editor/enterHandler/multilineString/spaces/enterBeforeMarginChar.kt

@@ -0,0 +1,12 @@
+fun some() {
+    val b = """
+        |helle<caret>|asdf
+        """.trimMargin()
+}
+//-----
+fun some() {
+    val b = """
+        |helle
+        <caret>|asdf
+        """.trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterInInfixMargin.kt

@@ -0,0 +1,11 @@
+val a =
+  """blah blah
+     | blah blah
+     | blah blah""" + """blah blah<caret>"""
+//-----
+val a =
+  """blah blah
+     | blah blah
+     | blah blah""" + """blah blah
+         |<caret>
+     """.trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/enterInLineWithMarginOnNotMargedLine.kt

@@ -0,0 +1,12 @@
+fun main(args: Array<String>) {
+    println("""
+        <caret>
+        |  sdf""".trimMargin())
+}
+//-----
+fun main(args: Array<String>) {
+    println("""
+
+        |<caret>
+        |  sdf""".trimMargin())
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterInMethodCallMargin.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>""".replace("\r", "")
+//-----
+val a = """blah blah
+    |<caret>
+""".trimMargin().replace("\r", "")

idea/testData/editor/enterHandler/multilineString/spaces/enterInOneLineAfterSpaces.kt

@@ -0,0 +1,4 @@
+val a = """    <caret>blah blah"""
+//-----
+val a = """
+    <caret>blah blah""".trimIndent()

idea/testData/editor/enterHandler/multilineString/spaces/enterInTwoLinesNoMarginCall.kt

@@ -0,0 +1,10 @@
+fun some() {
+    val b = """<caret>
+    """
+}
+//-----
+fun some() {
+    val b = """
+        <caret>
+    """
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterInsideBraces.kt

@@ -0,0 +1,11 @@
+val a =
+  """
+     |  blah blah blah {<caret>}
+  """.trimMargin()
+//-----
+val a =
+  """
+     |  blah blah blah {
+     |  <caret>
+     |  }
+  """.trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/enterInsideBraces1.kt

@@ -0,0 +1,17 @@
+fun some() {
+    val b = """
+        class Test {
+            fun some() {<caret>}
+        }
+    """.trimIndent()
+}
+//-----
+fun some() {
+    val b = """
+        class Test {
+            fun some() {
+            <caret>
+            }
+        }
+    """.trimIndent()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterInsideBraces2.kt

@@ -0,0 +1,9 @@
+fun some() {
+    val b = """class Test {<caret>}"""
+}
+//-----
+fun some() {
+    val b = """class Test {
+        |<caret>
+        |}""".trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterInsideTextMargin.kt

@@ -0,0 +1,8 @@
+object A {
+  val a = """blah<caret> blah"""
+}
+//-----
+object A {
+  val a = """blah
+      | <caret>blah""".trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterMLSimpleMargin.kt

@@ -0,0 +1,14 @@
+val a =
+  """
+     | blah blah blah
+     |  blah blah blah
+     |    blah blah blah<caret>
+  """
+//-----
+val a =
+  """
+     | blah blah blah
+     |  blah blah blah
+     |    blah blah blah
+     |    <caret>
+  """

idea/testData/editor/enterHandler/multilineString/spaces/enterMLStartOnSameLineMargin.kt

@@ -0,0 +1,8 @@
+val a = """blah blah blah
+           |  blah blah<caret>
+        """
+//-----
+val a = """blah blah blah
+           |  blah blah
+           |  <caret>
+        """

idea/testData/editor/enterHandler/multilineString/spaces/enterOnFirstLineWithPresentTrimMargin.kt

@@ -0,0 +1,10 @@
+fun some() {
+    val b = """<caret>
+        """.trimMargin()
+}
+//-----
+fun some() {
+    val b = """
+        |<caret>
+        """.trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterOnFirstLineWithPresentTrimMarginAndLine.kt

@@ -0,0 +1,12 @@
+fun some() {
+    val b = """<caret>
+        |hello
+        """.trimMargin()
+}
+//-----
+fun some() {
+    val b = """
+        |<caret>
+        |hello
+        """.trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterOnFirstNonEmptyLineWithPresentTrimMargin.kt

@@ -0,0 +1,10 @@
+fun some() {
+    val b = """abc<caret>
+        """.trimMargin()
+}
+//-----
+fun some() {
+    val b = """abc
+        |<caret>
+        """.trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterOnNewLine.kt

@@ -0,0 +1,7 @@
+val a =
+  """<caret>"""
+//-----
+val a =
+  """
+      <caret>
+  """.trimIndent()

idea/testData/editor/enterHandler/multilineString/spaces/enterSimple.kt

@@ -0,0 +1,9 @@
+class A {
+  val a = """<caret>"""
+}
+//-----
+class A {
+  val a = """
+      <caret>
+  """.trimIndent()
+}

idea/testData/editor/enterHandler/multilineString/spaces/enterWithTextMargin.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>"""
+//-----
+val a = """blah blah
+    |<caret>
+""".trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/enterWithTextOnNewLineMargin.kt

@@ -0,0 +1,7 @@
+val a =
+  """blah blah<caret>"""
+//-----
+val a =
+  """blah blah
+      |<caret>
+  """.trimMargin()

idea/testData/editor/enterHandler/multilineString/spaces/insertCustomMargin.kt

@@ -0,0 +1,9 @@
+class A {
+  val a = """blah blah<caret>""".trimMargin("#")
+}
+//-----
+class A {
+  val a = """blah blah
+      #<caret>
+  """.trimMargin("#")
+}

idea/testData/editor/enterHandler/multilineString/spaces/insertCustomMarginInLineStart.kt

@@ -0,0 +1,8 @@
+class A {
+  val a = """<caret>blah blah""".trimMargin("#")
+}
+//-----
+class A {
+  val a = """
+      #<caret>blah blah""".trimMargin("#")
+}

idea/testData/editor/enterHandler/multilineString/spaces/insertDefaultMargin.kt

@@ -0,0 +1,11 @@
+class A {
+  val m = '#'
+  val a = """blah blah<caret>""".trimMargin(m)
+}
+//-----
+class A {
+  val m = '#'
+  val a = """blah blah
+      |<caret>
+  """.trimMargin(m)
+}

idea/testData/editor/enterHandler/multilineString/spaces/noTrimIndentInAnnotations.kt

@@ -0,0 +1,7 @@
+@Annotation("""<caret>""")
+fun some() {}
+//-----
+@Annotation("""
+    <caret>
+""")
+fun some() {}

idea/testData/editor/enterHandler/multilineString/spaces/restoreIndentFromEmptyLine.kt

@@ -0,0 +1,12 @@
+fun main(args: Array<String>) {
+    println("""
+<caret>
+        |  sdf""".trimMargin())
+}
+//-----
+fun main(args: Array<String>) {
+    println("""
+
+|<caret>
+        |  sdf""".trimMargin())
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/dontInsertTrimMarginCall.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>""".trimMargin()
+//-----
+val a = """blah blah
+	|<caret>
+""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterInMethodCallMargin.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>""".replace("\r", "")
+//-----
+val a = """blah blah
+	|<caret>
+""".trimMargin().replace("\r", "")

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterInTwoLinesNoMarginCall.kt

@@ -0,0 +1,10 @@
+fun some() {
+	val b = """<caret>
+	"""
+}
+//-----
+fun some() {
+	val b = """
+		<caret>
+	"""
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterInsideBraces.kt

@@ -0,0 +1,11 @@
+val a =
+	"""
+		|  blah blah {<caret>}
+	""".trimMargin()
+//-----
+val a =
+	"""
+		|  blah blah {
+		|  <caret>
+		|  }
+	""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterInsideText.kt

@@ -0,0 +1,8 @@
+object A {
+	val a = """blah<caret> blah"""
+}
+//-----
+object A {
+	val a = """blah
+		| <caret>blah""".trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterMLSimpleMargin.kt

@@ -0,0 +1,14 @@
+val a =
+	"""
+		| blah blah blah
+		|  blah blah blah
+		|    blah blah blah<caret>
+	"""
+//-----
+val a =
+	"""
+		| blah blah blah
+		|  blah blah blah
+		|    blah blah blah
+		|    <caret>
+	"""

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterMLStartOnSameLineMargin.kt

@@ -0,0 +1,8 @@
+val a = """blah blah blah
+					|  blah blah<caret>
+				"""
+//-----
+val a = """blah blah blah
+					|  blah blah
+					|  <caret>
+				"""

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterOnNewLineMargin.kt

@@ -0,0 +1,7 @@
+val a =
+	"""<caret>"""
+//-----
+val a =
+	"""
+		<caret>
+	""".trimIndent()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterSimpleMargin.kt

@@ -0,0 +1,9 @@
+class A {
+	val a = """<caret>"""
+}
+//-----
+class A {
+	val a = """
+		<caret>
+	""".trimIndent()
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterWithTextMargin.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>"""
+//-----
+val a = """blah blah
+	|<caret>
+""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/enterWithTextOnNewLineMargin.kt

@@ -0,0 +1,7 @@
+val a =
+	"""blah blah<caret>"""
+//-----
+val a =
+	"""blah blah
+		|<caret>
+	""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs2/settings.txt

@@ -0,0 +1,3 @@
+// SET_TRUE: USE_TAB_CHARACTER
+// SET_INT: TAB_SIZE=2
+// SET_INT: INDENT_SIZE=2

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/dontInsertTrimMarginCall.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>""".trimMargin()
+//-----
+val a = """blah blah
+	|<caret>
+""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterInMethodCallMargin.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>""".replace("\r", "")
+//-----
+val a = """blah blah
+	|<caret>
+""".trimMargin().replace("\r", "")

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterInsideBraces.kt

@@ -0,0 +1,11 @@
+val a =
+	"""
+	  |  blah blah {<caret>}
+	""".trimMargin()
+//-----
+val a =
+	"""
+	  |  blah blah {
+	  |  <caret>
+	  |  }
+	""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterInsideText.kt

@@ -0,0 +1,8 @@
+object A {
+	val a = """blah<caret> blah"""
+}
+//-----
+object A {
+	val a = """blah
+		| <caret>blah""".trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterMLSimpleMargin.kt

@@ -0,0 +1,14 @@
+val a =
+	"""
+	  | blah blah blah
+	  |  blah blah blah
+	  |    blah blah blah<caret>
+	"""
+//-----
+val a =
+	"""
+	  | blah blah blah
+	  |  blah blah blah
+	  |    blah blah blah
+	  |    <caret>
+	"""

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterMLStartOnSameLineMargin.kt

@@ -0,0 +1,8 @@
+val a = """blah blah blah
+		  |  blah blah<caret>
+		"""
+//-----
+val a = """blah blah blah
+		  |  blah blah
+		  |  <caret>
+		"""

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterOnNewLineMargin.kt

@@ -0,0 +1,7 @@
+val a =
+	"""<caret>"""
+//-----
+val a =
+	"""
+		<caret>
+	""".trimIndent()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterSimpleMargin.kt

@@ -0,0 +1,9 @@
+class A {
+	val a = """<caret>"""
+}
+//-----
+class A {
+	val a = """
+		<caret>
+	""".trimIndent()
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterWithTabsAfterMarginChar.kt

@@ -0,0 +1,16 @@
+fun some() {
+	val b = """
+		|class Test() {
+		|	fun test() {<caret>
+		|}
+		""".trimMargin()
+}
+//-----
+fun some() {
+	val b = """
+		|class Test() {
+		|	fun test() {
+		|	<caret>
+		|}
+		""".trimMargin()
+}

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterWithTextMargin.kt

@@ -0,0 +1,5 @@
+val a = """blah blah<caret>"""
+//-----
+val a = """blah blah
+	|<caret>
+""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/enterWithTextOnNewLineMargin.kt

@@ -0,0 +1,7 @@
+val a =
+	"""blah blah<caret>"""
+//-----
+val a =
+	"""blah blah
+		|<caret>
+	""".trimMargin()

idea/testData/editor/enterHandler/multilineString/withTabs/tabs4/settings.txt

@@ -0,0 +1,3 @@
+// SET_TRUE: USE_TAB_CHARACTER
+// SET_INT: TAB_SIZE=4
+// SET_INT: INDENT_SIZE=4