fixed fast deleting deleting too many characters when there is a new line

app/src/main/java/io/github/sspanak/tt9/ime/helpers/TextField.java

@@ -161,13 +161,13 @@ public class TextField extends InputField {
 			return 0;
 		}
 
-		String before = getStringBeforeCursor();
+		Text before = getTextBeforeCursor();
 		if (before.isEmpty()) {
 			return 0;
 		}
 
-		int spaceShift = Math.max(before.lastIndexOf(' '), 0);
+		int whitespaceShift = Math.max(before.lastWhitespaceBlockIndex(), 0);
-		return Math.min(before.length() - spaceShift, (int) (SettingsStore.BACKSPACE_ACCELERATION_MAX_CHARS * 1.5));
+		return Math.min(before.length() - whitespaceShift, (int) (SettingsStore.BACKSPACE_ACCELERATION_MAX_CHARS * 1.5));
 	}
 
 

app/src/main/java/io/github/sspanak/tt9/util/Text.java

@@ -11,16 +11,19 @@ public class Text extends TextTools {
 	private final Language language;
 	private final String text;
 
+
 	public Text(Language language, String text) {
 		this.language = language;
 		this.text = text;
 	}
 
+
 	public Text(String text) {
 		this.language = null;
 		this.text = text;
 	}
 
+
 	public String capitalize() {
 		if (language == null || text == null || text.isEmpty() || !language.hasUpperCase()) {
 			return text;
@@ -32,11 +35,11 @@ public class Text extends TextTools {
 	}
 
 
-
 	public boolean endsWithGraphic() {
 		return text != null && !text.isEmpty() && Characters.isGraphic(text.charAt(text.length() - 1));
 	}
 
+
 	public int getTextCase() {
 		if (isUpperCase()) {
 			return InputMode.CASE_UPPER;
@@ -49,6 +52,7 @@ public class Text extends TextTools {
 		}
 	}
 
+
 	public boolean isAlphabetic() {
 		for (int i = 0, end = text == null ? 0 : text.length(); i < end; i++) {
 			if (!Character.isAlphabetic(text.charAt(i))) {
@@ -59,6 +63,7 @@ public class Text extends TextTools {
 		return true;
 	}
 
+
 	public boolean isNumeric() {
 		if (text == null) {
 			return false;
@@ -73,10 +78,12 @@ public class Text extends TextTools {
 		return true;
 	}
 
+
 	public boolean isEmpty() {
 		return text == null || text.isEmpty();
 	}
 
+
 	private boolean isCapitalized() {
 		if (text == null || text.length() < 2) {
 			return false;
@@ -95,6 +102,7 @@ public class Text extends TextTools {
 		return true;
 	}
 
+
 	public boolean isMixedCase() {
 		return
 			language != null
@@ -103,10 +111,12 @@ public class Text extends TextTools {
 			&& !text.toUpperCase(language.getLocale()).equals(text);
 	}
 
+
 	public boolean isUpperCase() {
 		return language != null && text != null && text.toUpperCase(language.getLocale()).equals(text);
 	}
 
+
 	public String leaveEndingGraphics() {
 		if (text == null) {
 			return "";
@@ -127,6 +137,7 @@ public class Text extends TextTools {
 		return sb.toString();
 	}
 
+
 	public String leaveStartingGraphics() {
 		if (text == null) {
 			return "";
@@ -148,22 +159,49 @@ public class Text extends TextTools {
 	}
 
 
+	public int length() {
+		return text == null ? 0 : text.length();
+	}
+
+
+	public int lastWhitespaceBlockIndex() {
+		if (text == null) {
+			return -1;
+		}
+
+		for (int i = text.length() - 1; i >= 0; i--) {
+			if (
+				Character.isWhitespace(text.charAt(i))
+				&& (i == 0 || !Character.isWhitespace(text.charAt(i - 1)))
+			) {
+				return i;
+			}
+		}
+
+		return -1;
+	}
+
+
 	public boolean startsWithWhitespace() {
 		return text != null && !text.isEmpty() && Character.isWhitespace(text.charAt(0)) && !text.startsWith("\n");
 	}
 
+
 	public boolean startsWithNumber() {
 		return text != null && !text.isEmpty() && Character.isDigit(text.charAt(0));
 	}
 
+
 	public boolean startsWithGraphic() {
 		return text != null && !text.isEmpty() && Characters.isGraphic(text.charAt(0));
 	}
 
+
 	public boolean startsWithWord() {
 		return text != null && !text.isEmpty() && Character.isAlphabetic(text.charAt(0));
 	}
 
+
 	public String subStringEndingWord(boolean keepApostrophe, boolean keepQuote) {
 		if (text == null) {
 			return "";
@@ -184,6 +222,7 @@ public class Text extends TextTools {
 		return sub.toString();
 	}
 
+
 	public String subStringStartingWord(boolean keepApostrophe, boolean keepQuote) {
 		if (text == null) {
 			return "";
@@ -204,6 +243,7 @@ public class Text extends TextTools {
 		return sub.toString();
 	}
 
+
 	public String toLowerCase() {
 		if (text == null) {
 			return "";
@@ -212,6 +252,7 @@ public class Text extends TextTools {
 		}
 	}
 
+
 	public String toUpperCase() {
 		if (text == null) {
 			return "";
@@ -220,6 +261,7 @@ public class Text extends TextTools {
 		}
 	}
 
+
 	@NonNull
 	@Override
 	public String toString() {