Scroll caret into view after undo/redo

This is to ensure that 'scrolloff' is applied. Relates to VIM-3671

src/test/java/org/jetbrains/plugins/ideavim/action/change/UndoActionTest.kt

@@ -162,6 +162,16 @@ class UndoActionTest : VimTestCase() {
     configureByText("Lorem ${c}ipsum dolor sit amet")
   }
 
+  @Test
+  @TestFor(issues = ["VIM-3671"])
+  fun `test undo scrolls caret to reset scrolloff`() {
+    configureByLines(200, "lorem ipsum dolor sit amet")
+    enterCommand("set scrolloff=10")
+    typeText("50G", "dd", "G", "u")
+    assertPosition(49, 0)
+    assertVisibleArea(39, 73)
+  }
+
   private fun hasSelection(): Boolean {
     val editor = fixture.editor
     return editor.caretModel.primaryCaret.hasSelection()

src/test/java/org/jetbrains/plugins/ideavim/ex/implementation/commands/RedoCommandTest.kt

@@ -8,6 +8,7 @@
 
 package org.jetbrains.plugins.ideavim.ex.implementation.commands
 
+import com.intellij.idea.TestFor
 import com.maddyhome.idea.vim.api.injector
 import com.maddyhome.idea.vim.vimscript.model.commands.RedoCommand
 import org.jetbrains.plugins.ideavim.VimTestCase
@@ -20,4 +21,15 @@ class RedoCommandTest : VimTestCase() {
     val command = injector.vimscriptParser.parseCommand("redo")
     assertTrue(command is RedoCommand)
   }
-}
+
+  @Test
+  @TestFor(issues = ["VIM-3671"])
+  fun `test redo scrolls caret to reset scrolloff`() {
+    configureByLines(200, "lorem ipsum dolor sit amet")
+    enterCommand("set scrolloff=10")
+    typeText("50G", "dd", "u", "G")
+    enterCommand("redo")
+    assertPosition(49, 0)
+    assertVisibleArea(39, 73)
+  }
+}

src/test/java/org/jetbrains/plugins/ideavim/ex/implementation/commands/UndoCommandTest.kt

@@ -8,6 +8,7 @@
 
 package org.jetbrains.plugins.ideavim.ex.implementation.commands
 
+import com.intellij.idea.TestFor
 import com.maddyhome.idea.vim.api.injector
 import com.maddyhome.idea.vim.vimscript.model.commands.UndoCommand
 import org.jetbrains.plugins.ideavim.VimTestCase
@@ -20,4 +21,15 @@ class UndoCommandTest : VimTestCase() {
     val command = injector.vimscriptParser.parseCommand("undo")
     assertTrue(command is UndoCommand)
   }
-}
+
+  @Test
+  @TestFor(issues = ["VIM-3671"])
+  fun `test undo scrolls caret to reset scrolloff`() {
+    configureByLines(200, "lorem ipsum dolor sit amet")
+    enterCommand("set scrolloff=10")
+    typeText("50G", "dd", "G")
+    enterCommand("undo")
+    assertPosition(49, 0)
+    assertVisibleArea(39, 73)
+  }
+}

vim-engine/src/main/kotlin/com/maddyhome/idea/vim/action/change/RedoAction.kt

@@ -31,6 +31,7 @@ class RedoAction : VimActionHandler.SingleExecution() {
     while ((--count > 0) && result) {
       result = injector.undo.redo(editor, context)
     }
+    injector.scroll.scrollCaretIntoView(editor)
     return result
   }
 }

vim-engine/src/main/kotlin/com/maddyhome/idea/vim/action/change/UndoAction.kt

@@ -31,6 +31,7 @@ class UndoAction : VimActionHandler.SingleExecution() {
     while ((--count > 0) && result) {
       result = injector.undo.undo(editor, context)
     }
+    injector.scroll.scrollCaretIntoView(editor)
     return result
   }
 }

vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/commands/RedoCommand.kt

@@ -23,6 +23,9 @@ import com.maddyhome.idea.vim.vimscript.model.ExecutionResult
 data class RedoCommand(val range: Range, val argument: String) : Command.SingleExecution(range, argument) {
   override val argFlags: CommandHandlerFlags = flags(RangeFlag.RANGE_FORBIDDEN, ArgumentFlag.ARGUMENT_FORBIDDEN, Access.WRITABLE)
   override fun processCommand(editor: VimEditor, context: ExecutionContext, operatorArguments: OperatorArguments): ExecutionResult {
-    return if (injector.undo.redo(editor, context)) ExecutionResult.Success else ExecutionResult.Error
+    return if (injector.undo.redo(editor, context)) {
+      injector.scroll.scrollCaretIntoView(editor)
+      ExecutionResult.Success
+    } else ExecutionResult.Error
   }
 }

vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/commands/UndoCommand.kt

@@ -24,6 +24,9 @@ data class UndoCommand(val range: Range, val argument: String) : Command.SingleE
   override val argFlags: CommandHandlerFlags = flags(RangeFlag.RANGE_FORBIDDEN, ArgumentFlag.ARGUMENT_FORBIDDEN, Access.WRITABLE)
 
   override fun processCommand(editor: VimEditor, context: ExecutionContext, operatorArguments: OperatorArguments): ExecutionResult {
-    return if (injector.undo.undo(editor, context)) ExecutionResult.Success else ExecutionResult.Error
+    return if (injector.undo.undo(editor, context)) {
+      injector.scroll.scrollCaretIntoView(editor)
+      ExecutionResult.Success
+    } else ExecutionResult.Error
   }
 }