More precise filters in textinputpanel

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

@@ -27,8 +27,11 @@ import ru.dbotthepony.mc.otm.client.screen.panels.DockProperty
 import ru.dbotthepony.mc.otm.client.screen.panels.EditablePanel
 import ru.dbotthepony.mc.otm.core.TextComponent
 import ru.dbotthepony.mc.otm.core.addAll
+import ru.dbotthepony.mc.otm.core.collect.mapToInt
+import ru.dbotthepony.mc.otm.core.collect.reduce
 import ru.dbotthepony.mc.otm.core.math.RGBAColor
 import ru.dbotthepony.mc.otm.milliTime
+import java.util.function.Predicate
 import kotlin.math.roundToInt
 
 open class TextInputPanel<out S : Screen>(
@@ -179,7 +182,7 @@ open class TextInputPanel<out S : Screen>(
 			textCache = null
 			val old = oldText.joinToString("\n")
 			oldText = ArrayList(lines)
-			onTextChanged(old, textCache())
+			onTextChanged(textCache(), old)
 		}
 	}
 
@@ -650,8 +653,10 @@ open class TextInputPanel<out S : Screen>(
 		return true
 	}
 
-	open fun onEnter() {
+	var onEnter: Runnable? = null
 
+	open fun onEnter() {
+		onEnter?.run()
 	}
 
 	override fun keyPressedInternal(key: Int, scancode: Int, mods: Int): Boolean {
@@ -899,7 +904,8 @@ open class TextInputPanel<out S : Screen>(
 			pushbackSnapshot()
 
 			if (multiLine) {
-				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").filter { acceptsCharacter(it) }.split(NEWLINES).toMutableList()
+				var index = cursorRow + (0 until cursorLine).iterator().mapToInt { this[it]?.length ?: 0 }.reduce(0, Int::plus)
+				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").filter { acceptsCharacter(it, 0, index++) }.split(NEWLINES).toMutableList()
 				val actualLastSize = insert.lastOrNull()?.length ?: 0
 				val line = this[cursorLine]
 
@@ -938,7 +944,8 @@ open class TextInputPanel<out S : Screen>(
 					cursorRow = actualLastSize
 				}
 			} else {
-				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").replace(NEWLINES, "").filter { acceptsCharacter(it) }
+				var index = cursorRow + (0 until cursorLine).iterator().mapToInt { this[it]?.length ?: 0 }.reduce(0, Int::plus)
+				val insert = minecraft.keyboardHandler.clipboard.replace("\t", "    ").replace(NEWLINES, "").filter { acceptsCharacter(it, 0, index++) }
 				val line = this[cursorLine]
 
 				if (line == null) {
@@ -1017,8 +1024,38 @@ open class TextInputPanel<out S : Screen>(
 		return true
 	}
 
-	open fun acceptsCharacter(codepoint: Char, mods: Int = 0): Boolean {
+	fun interface CharacterFilter : Predicate<Char> {
-		return true
+		fun acceptsCharacter(codepoint: Char, mods: Int, index: Int): Boolean
+
+		override fun test(t: Char): Boolean {
+			return acceptsCharacter(t, 0, 0)
+		}
+	}
+
+	var characterFilter: CharacterFilter? = null
+
+	fun allowEverything() {
+		characterFilter = null
+	}
+
+	fun allowNumbersAndSign() {
+		characterFilter = CharacterFilter { it, _, i -> if (i == 0) it in SIGNS || it in NUMBERS else it in NUMBERS }
+	}
+
+	fun allowNumbers() {
+		characterFilter = CharacterFilter { it, _, _ -> it in NUMBERS }
+	}
+
+	fun allowHexNumbersAndSign() {
+		characterFilter = CharacterFilter { it, _, i -> if (i == 0) it in SIGNS || it in HEX else it in HEX }
+	}
+
+	fun allowHexNumbers() {
+		characterFilter = CharacterFilter { it, _, _ -> it in HEX }
+	}
+
+	open fun acceptsCharacter(codepoint: Char, mods: Int = 0, index: Int): Boolean {
+		return characterFilter?.acceptsCharacter(codepoint, mods, index) ?: true
 	}
 
 	override fun charTypedInternal(codepoint: Char, mods: Int): Boolean {
@@ -1027,11 +1064,6 @@ open class TextInputPanel<out S : Screen>(
 			return true
 		}
 
-		if (!acceptsCharacter(codepoint, mods)) {
-			playGuiClickSound()
-			return true
-		}
-
 		wipeSelection()
 
 		if (!multiLine)
@@ -1045,6 +1077,15 @@ open class TextInputPanel<out S : Screen>(
 			cursorRow = 0
 		}
 
+		var index = 0
+		for (i in 0 until cursorLine) index += this[i]?.length ?: 0
+		index += cursorRow
+
+		if (!acceptsCharacter(codepoint, mods, index)) {
+			playGuiClickSound()
+			return true
+		}
+
 		if (cursorRow >= line.length)
 			line += codepoint
 		else
@@ -1349,13 +1390,13 @@ open class TextInputPanel<out S : Screen>(
 		return true
 	}
 
-	protected open fun onTextChanged(old: String, new: String) {
+	protected open fun onTextChanged(new: String, old: String) {
-		changeCallback?.invoke(old, new)
+		changeCallback?.invoke(new, old)
 	}
 
-	protected var changeCallback: ((old: String, new: String) -> Unit)? = null
+	protected var changeCallback: ((new: String, old: String) -> Unit)? = null
 
-	fun onTextChange(callback: (old: String, new: String) -> Unit) {
+	fun onTextChange(callback: (new: String, old: String) -> Unit) {
 		changeCallback = callback
 	}
 
@@ -1420,6 +1461,21 @@ open class TextInputPanel<out S : Screen>(
 				it.add(char)
 		}
 
+		private val NUMBERS = CharOpenHashSet().also {
+			for (char in "0123456789-+")
+				it.add(char)
+		}
+
+		private val SIGNS = CharOpenHashSet().also {
+			for (char in "-+")
+				it.add(char)
+		}
+
+		private val HEX = CharOpenHashSet().also {
+			for (char in "0123456789ABCDEFabcdef")
+				it.add(char)
+		}
+
 		private fun greedyAdvanceLeft(input: String, position: Int): Int {
 			if (position <= 1)
 				return -1