Polishing fixes to TextInputPanel

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/input/TextInputPanel.kt

@@ -881,6 +881,11 @@ open class TextInputPanel<out S : Screen>(
 				selections[i] = TextSelection(0, line.length + 1)
 			}
 
+			if (lines.isNotEmpty()) {
+				cursorLine = lines.size - 1
+				cursorRow = lines[lines.size - 1].length
+			}
+
 			return true
 		}
 
@@ -889,30 +894,43 @@ open class TextInputPanel<out S : Screen>(
 			pushbackSnapshot()
 
 			if (multiLine) {
-				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").split(NEWLINES)
+				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").split(NEWLINES).toMutableList()
-
+				val actualLastSize = insert.lastOrNull()?.length ?: 0
 				val line = this[cursorLine]
 
 				if (line == null) {
 					insertLine(cursorLine, insert[0])
+					cursorRow = insert[0].length
 				} else if (line.isEmpty()) {
 					this[cursorLine] = insert[0]
+					cursorRow = insert[0].length
 				} else {
+					if (insert.size == 1) {
 						this[cursorLine] = line.substring(0, cursorRow.coerceAtMost(line.length - 1)) + insert[0] + line.substring(cursorRow.coerceAtMost(line.length))
+					} else {
+						this[cursorLine] = line.substring(0, cursorRow.coerceAtMost(line.length - 1)) + insert[0]
+						insert[insert.size - 1] += line.substring(cursorRow.coerceAtMost(line.length))
+					}
+
+					cursorRow += insert[0].length
 				}
 
 				for (i in 1 until insert.size - 1) {
 					insertLine(++cursorLine, insert[i])
+					cursorRow = insert[i].length
 				}
 
-				if (insert.size >= 3) {
+				if (insert.size >= 2) {
 					val line2 = this[++cursorLine]
+					val last = insert.last()
 
 					if (line2 == null) {
-						insertLine(cursorLine, insert.last())
+						insertLine(cursorLine, last)
 					} else {
-						this[cursorLine] = insert.last() + line2
+						this[cursorLine] = last + line2
 					}
+
+					cursorRow = actualLastSize
 				}
 			} else {
 				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").replace(NEWLINES, "")
@@ -920,10 +938,13 @@ open class TextInputPanel<out S : Screen>(
 
 				if (line == null) {
 					insertLine(cursorLine, insert)
+					cursorRow = insert.length
 				} else if (line.isEmpty()) {
 					this[cursorLine] = insert
+					cursorRow = insert.length
 				} else {
 					this[cursorLine] = line.substring(0, cursorRow.coerceAtMost(line.length - 1)) + insert + line.substring(cursorRow.coerceAtMost(line.length))
+					cursorRow += insert.length
 				}
 			}
 
@@ -1082,6 +1103,8 @@ open class TextInputPanel<out S : Screen>(
 			} else if (w >= width - dockPadding.right) {
 				scrollPixels += 30f
 			}
+		} else {
+			scrollPixels = 0f
 		}
 
 		stack.pushPose()