feat(CustomSingleLineTextField, CustomMultiLineTextArea): add word navigation, page up/down, word delete and tab keys

src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomMultiLineTextArea.java

@@ -183,7 +183,7 @@ public class CustomMultiLineTextArea extends Component {
 					deleteSelection();
 					insertChar('\n');
 				}
-				else if (ch == '\b') {
+				else if (ch == '\b' && !e.isControlDown()) {
 					backspace();
 				}
 			}
@@ -196,10 +196,19 @@ public class CustomMultiLineTextArea extends Component {
 				
 				final boolean shiftPressed = e.isShiftDown();
 				final boolean ctrlPressed = e.isControlDown();
+				final boolean altPressed = e.isAltDown();
 				
 				switch (e.getKeyCode()) {
 					case KeyEvent.VK_LEFT:
+						if (ctrlPressed || altPressed) {
 						if (CustomMultiLineTextArea.this.caretPosition > 0) {
+							moveCaretToPreviousWordStart();
+							if (!shiftPressed) {
+								CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
+							}
+						}
+					}
+					else if (CustomMultiLineTextArea.this.caretPosition > 0) {
 						CustomMultiLineTextArea.this.caretPosition--;
 						if (!shiftPressed) {
 							CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
@@ -209,7 +218,15 @@ public class CustomMultiLineTextArea extends Component {
 					}
 					break;
 				case KeyEvent.VK_RIGHT:
+					if (ctrlPressed || altPressed) {
 						if (CustomMultiLineTextArea.this.caretPosition < CustomMultiLineTextArea.this.text.length()) {
+							moveCaretToNextWordEnd();
+							if (!shiftPressed) {
+								CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
+							}
+						}
+					}
+					else if (CustomMultiLineTextArea.this.caretPosition < CustomMultiLineTextArea.this.text.length()) {
 						CustomMultiLineTextArea.this.caretPosition++;
 						if (!shiftPressed) {
 							CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
@@ -230,20 +247,50 @@ public class CustomMultiLineTextArea extends Component {
 						CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
 					}
 					break;
+				case KeyEvent.VK_PAGE_UP:
+					moveCaretByPage(true);
+					if (!shiftPressed) {
+						CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
+					}
+					break;
+				case KeyEvent.VK_PAGE_DOWN:
+					moveCaretByPage(false);
+					if (!shiftPressed) {
+						CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
+					}
+					break;
 				case KeyEvent.VK_HOME:
+					if (ctrlPressed) {
+						CustomMultiLineTextArea.this.caretPosition = 0;
+						ensureCaretVisible();
+						CustomMultiLineTextArea.this.dirty = true;
+					}
+					else {
 						moveCaretToLineStart();
+					}
 					if (!shiftPressed) {
 						CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
 					}
 					break;
 				case KeyEvent.VK_END:
+					if (ctrlPressed) {
+						CustomMultiLineTextArea.this.caretPosition = CustomMultiLineTextArea.this.text.length();
+						ensureCaretVisible();
+						CustomMultiLineTextArea.this.dirty = true;
+					}
+					else {
 						moveCaretToLineEnd();
+					}
 					if (!shiftPressed) {
 						CustomMultiLineTextArea.this.selectionAnchor = CustomMultiLineTextArea.this.caretPosition;
 					}
 					break;
 				case KeyEvent.VK_DELETE:
-						if (!CustomMultiLineTextArea.this.readonly) {
+					if (ctrlPressed && !CustomMultiLineTextArea.this.readonly) {
+						deleteWordForward();
+						e.consume();
+					}
+					else if (!CustomMultiLineTextArea.this.readonly) {
 						if (hasSelection()) {
 							if (e.isShiftDown()) {
 								cut();
@@ -261,6 +308,18 @@ public class CustomMultiLineTextArea extends Component {
 						}
 					}
 					break;
+				case KeyEvent.VK_BACK_SPACE:
+					if (ctrlPressed && !CustomMultiLineTextArea.this.readonly) {
+						deleteWordBackward();
+						e.consume();
+					}
+					break;
+				case KeyEvent.VK_TAB:
+					if (!CustomMultiLineTextArea.this.readonly) {
+						insertChar('\t');
+						e.consume();
+					}
+					break;
 					case KeyEvent.VK_C:
 						if (ctrlPressed) {
 							copy();
@@ -447,6 +506,69 @@ public class CustomMultiLineTextArea extends Component {
 		}
 	}
 	
+	private void deleteWordBackward() {
+		if (hasSelection()) {
+			deleteSelection();
+			return;
+		}
+		
+		if (this.caretPosition == 0) {
+			return;
+		}
+		
+		int position = this.caretPosition;
+		
+		if (isWordCharacter(this.text.charAt(position - 1))) {
+			while (position > 0 && isWordCharacter(this.text.charAt(position - 1))) {
+				position--;
+			}
+		}
+		else {
+			while (position > 0 && !isWordCharacter(this.text.charAt(position - 1))) {
+				position--;
+			}
+		}
+		
+		this.text = this.text.substring(0, position) + this.text.substring(this.caretPosition);
+		this.caretPosition = position;
+		this.selectionAnchor = position;
+		this.cachedWrappedLines = null;
+		ensureCaretVisible();
+		notifyTextChanged();
+		this.dirty = true;
+	}
+	
+	private void deleteWordForward() {
+		if (hasSelection()) {
+			deleteSelection();
+			return;
+		}
+		
+		final int length = this.text.length();
+		if (this.caretPosition >= length) {
+			return;
+		}
+		
+		int position = this.caretPosition;
+		
+		if (isWordCharacter(this.text.charAt(position))) {
+			while (position < length && isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+		else {
+			while (position < length && !isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+		
+		this.text = this.text.substring(0, this.caretPosition) + this.text.substring(position);
+		this.cachedWrappedLines = null;
+		ensureCaretVisible();
+		notifyTextChanged();
+		this.dirty = true;
+	}
+	
 	private void notifyTextChanged() {
 		this.recalculateScrollOffset();
 		if (this.onTextChanged != null) {
@@ -491,6 +613,62 @@ public class CustomMultiLineTextArea extends Component {
 		}
 	}
 	
+	private void moveCaretByPage(final boolean up) {
+		final List<String> wrappedLines = getWrappedLines();
+		final int lineHeight = getLineHeight();
+		final int linesPerPage = Math.max(1, getVisibleHeight() / lineHeight);
+		
+		final int currentWrappedLine = getWrappedLineIndexAtCaret();
+		final int lineStart = getCharOffsetAtWrappedLineStart(currentWrappedLine);
+		final int offsetInLine = this.caretPosition - lineStart;
+		
+		final int targetWrappedLine = Math.max(0, Math.min(wrappedLines.size() - 1, currentWrappedLine + (up ? -linesPerPage : linesPerPage)));
+		
+		if (targetWrappedLine != currentWrappedLine) {
+			final int targetLineStart = getCharOffsetAtWrappedLineStart(targetWrappedLine);
+			final int targetLineLength = wrappedLines.get(targetWrappedLine).length();
+			this.caretPosition = targetLineStart + Math.min(offsetInLine, targetLineLength);
+			ensureCaretVisible();
+			this.dirty = true;
+		}
+	}
+	
+	private void moveCaretToPreviousWordStart() {
+		int position = this.caretPosition;
+		
+		while (position > 0 && !isWordCharacter(this.text.charAt(position - 1))) {
+			position--;
+		}
+		
+		while (position > 0 && isWordCharacter(this.text.charAt(position - 1))) {
+			position--;
+		}
+		
+		this.caretPosition = position;
+		ensureCaretVisible();
+		this.dirty = true;
+	}
+	
+	private void moveCaretToNextWordEnd() {
+		int position = this.caretPosition;
+		final int length = this.text.length();
+		
+		if (position < length && isWordCharacter(this.text.charAt(position))) {
+			while (position < length && isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+		else {
+			while (position < length && !isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+		
+		this.caretPosition = position;
+		ensureCaretVisible();
+		this.dirty = true;
+	}
+	
 	private void moveCaretToLineStart() {
 		final int currentWrappedLine = getWrappedLineIndexAtCaret();
 		this.caretPosition = getCharOffsetAtWrappedLineStart(currentWrappedLine);

src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomSingleLineTextField.java

@@ -142,7 +142,7 @@ public class CustomSingleLineTextField extends Component {
 					deleteSelection();
 					insertChar(ch);
 				}
-				else if (ch == '\b') {
+			else if (ch == '\b' && !e.isControlDown()) {
 				backspace();
 			}
 			}
@@ -155,6 +155,7 @@ public class CustomSingleLineTextField extends Component {
 
 				final boolean shiftPressed = e.isShiftDown();
 				final boolean ctrlPressed = e.isControlDown();
+				final boolean altPressed = e.isAltDown();
 
 				switch (e.getKeyCode()) {
 					case KeyEvent.VK_ENTER:
@@ -165,7 +166,15 @@ public class CustomSingleLineTextField extends Component {
 						}
 						break;
 				case KeyEvent.VK_LEFT:
+					if (ctrlPressed || altPressed) {
 						if (CustomSingleLineTextField.this.caretPosition > 0) {
+							moveCaretToPreviousWordStart();
+							if (!shiftPressed) {
+								CustomSingleLineTextField.this.selectionAnchor = CustomSingleLineTextField.this.caretPosition;
+							}
+						}
+					}
+					else if (CustomSingleLineTextField.this.caretPosition > 0) {
 						CustomSingleLineTextField.this.caretPosition--;
 						if (!shiftPressed) {
 							CustomSingleLineTextField.this.selectionAnchor = CustomSingleLineTextField.this.caretPosition;
@@ -175,7 +184,15 @@ public class CustomSingleLineTextField extends Component {
 					}
 					break;
 				case KeyEvent.VK_RIGHT:
+					if (ctrlPressed || altPressed) {
 						if (CustomSingleLineTextField.this.caretPosition < CustomSingleLineTextField.this.text.length()) {
+							moveCaretToNextWordEnd();
+							if (!shiftPressed) {
+								CustomSingleLineTextField.this.selectionAnchor = CustomSingleLineTextField.this.caretPosition;
+							}
+						}
+					}
+					else if (CustomSingleLineTextField.this.caretPosition < CustomSingleLineTextField.this.text.length()) {
 						CustomSingleLineTextField.this.caretPosition++;
 						if (!shiftPressed) {
 							CustomSingleLineTextField.this.selectionAnchor = CustomSingleLineTextField.this.caretPosition;
@@ -201,7 +218,11 @@ public class CustomSingleLineTextField extends Component {
 						CustomSingleLineTextField.this.dirty = true;
 						break;
 				case KeyEvent.VK_DELETE:
-						if (!CustomSingleLineTextField.this.readonly) {
+					if (ctrlPressed && !CustomSingleLineTextField.this.readonly) {
+						deleteWordForward();
+						e.consume();
+					}
+					else if (!CustomSingleLineTextField.this.readonly) {
 						if (hasSelection()) {
 							if (e.isShiftDown()) {
 								cut();
@@ -218,6 +239,12 @@ public class CustomSingleLineTextField extends Component {
 						}
 					}
 					break;
+				case KeyEvent.VK_BACK_SPACE:
+					if (ctrlPressed && !CustomSingleLineTextField.this.readonly) {
+						deleteWordBackward();
+						e.consume();
+					}
+					break;
 					case KeyEvent.VK_C:
 						if (ctrlPressed) {
 							copy();
@@ -364,6 +391,67 @@ public class CustomSingleLineTextField extends Component {
 		}
 	}
 
+	private void deleteWordBackward() {
+		if (hasSelection()) {
+			deleteSelection();
+			return;
+		}
+
+		if (this.caretPosition == 0) {
+			return;
+		}
+
+		int position = this.caretPosition;
+
+		if (isWordCharacter(this.text.charAt(position - 1))) {
+			while (position > 0 && isWordCharacter(this.text.charAt(position - 1))) {
+				position--;
+			}
+		}
+		else {
+			while (position > 0 && !isWordCharacter(this.text.charAt(position - 1))) {
+				position--;
+			}
+		}
+
+		this.text = this.text.substring(0, position) + this.text.substring(this.caretPosition);
+		this.caretPosition = position;
+		this.selectionAnchor = position;
+		ensureCaretVisible();
+		notifyTextChanged();
+		this.dirty = true;
+	}
+
+	private void deleteWordForward() {
+		if (hasSelection()) {
+			deleteSelection();
+			return;
+		}
+
+		final int length = this.text.length();
+		if (this.caretPosition >= length) {
+			return;
+		}
+
+		int position = this.caretPosition;
+
+		if (isWordCharacter(this.text.charAt(position))) {
+			while (position < length && isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+		else {
+			while (position < length && !isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+
+		this.text = this.text.substring(0, this.caretPosition) + this.text.substring(position);
+		ensureCaretVisible();
+		notifyTextChanged();
+		this.dirty = true;
+	}
+
 	private void notifyTextChanged() {
 		if (this.onTextChanged != null) {
 			this.onTextChanged.accept(this.text);
@@ -529,6 +617,42 @@ public class CustomSingleLineTextField extends Component {
 		}
 	}
 
+	private void moveCaretToPreviousWordStart() {
+		int position = this.caretPosition;
+
+		while (position > 0 && !isWordCharacter(this.text.charAt(position - 1))) {
+			position--;
+		}
+
+		while (position > 0 && isWordCharacter(this.text.charAt(position - 1))) {
+			position--;
+		}
+
+		this.caretPosition = position;
+		ensureCaretVisible();
+		this.dirty = true;
+	}
+
+	private void moveCaretToNextWordEnd() {
+		int position = this.caretPosition;
+		final int length = this.text.length();
+
+		if (position < length && isWordCharacter(this.text.charAt(position))) {
+			while (position < length && isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+		else {
+			while (position < length && !isWordCharacter(this.text.charAt(position))) {
+				position++;
+			}
+		}
+
+		this.caretPosition = position;
+		ensureCaretVisible();
+		this.dirty = true;
+	}
+
 	private boolean isWordCharacter(final char ch) {
 		return Character.isLetterOrDigit(ch) || ch == '_';
 	}