Fixed a multiline text field's cursor not returning to the default position when the last character is removed

CHANGELOG.md

@@ -12,9 +12,15 @@ Jump to version:
 
 ## 6.2.0 (In Development)
 
+### MLEM
+Fixes
+- Fixed control characters being included in TextInput
+
 ### MLEM.Ui
 Fixes
 - Fixed images not updating their hidden state properly when the displayed texture changes
+- Fixed control characters being included in TextField
+- Fixed a multiline text field's cursor not returning to the default position when the last character is removed
 
 ## 6.1.0
 

MLEM/Input/TextInput.cs

@@ -415,16 +415,20 @@ namespace MLEM.Input {
         }
 
         private bool FilterText(ref string text, bool removeMismatching) {
-            if (removeMismatching) {
             var result = new StringBuilder();
             foreach (var codePoint in new CodePointSource(text)) {
                 var character = char.ConvertFromUtf32(codePoint);
-                    if (this.InputRule(this, character))
+                // don't include control characters
+                if (character.Length == 1 && char.IsControl(character, 0))
+                    continue;
+                if (this.InputRule(this, character)) {
                     result.Append(character);
+                } else if (!removeMismatching) {
+                    // if we don't remove mismatching characters, we just fail
+                    return false;
+                }
             }
             text = result.ToString();
-            } else if (!this.InputRule(this, text))
-                return false;
             return true;
         }
 
@@ -508,6 +512,14 @@ namespace MLEM.Input {
 
         private void UpdateCaretData() {
             if (this.splitText != null) {
+                // the code below will never execute if our text is empty, so reset our caret position fully
+                if (this.splitText.Length <= 0) {
+                    this.caretLine = 0;
+                    this.caretPosInLine = 0;
+                    this.caretDrawOffset = 0;
+                    return;
+                }
+
                 var line = 0;
                 var index = 0;
                 for (var d = 0; d < this.splitText.Length; d++) {