multiplication sign fix

src/main/java/org/solovyev/android/calculator/CalculatorActivity.java

@@ -19,6 +19,7 @@ import android.text.method.LinkMovementMethod;
 import android.util.Log;
 import android.util.TypedValue;
 import android.view.*;
+import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 import jscl.AngleUnit;
@@ -141,6 +142,8 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 
 		CalculatorEngine.instance.reset(this, preferences);
 
+		initMultiplicationButton();
+
 		preferences.registerOnSharedPreferenceChangeListener(this);
 	}
 
@@ -410,7 +413,7 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 	@SuppressWarnings({"UnusedDeclaration"})
 	public void digitButtonClickHandler(@NotNull View v) {
 		Log.d(String.valueOf(v.getId()), "digitButtonClickHandler() for: " + v.getId() + ". Pressed: " + v.isPressed());
-		calculatorModel.processDigitButtonAction(((DirectionDragButton) v).getTextMiddle());
+		calculatorModel.processDigitButtonAction(((DirectionDragButton) v).getText().toString());
 	}
 
 	@SuppressWarnings({"UnusedDeclaration"})
@@ -561,6 +564,7 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 		dpclRegister.announce().onDragPreferencesChange(SimpleOnDragListener.getPreferences(preferences, this));
 
 		if (CalculatorEngine.GROUPING_SEPARATOR_P_KEY.equals(key) ||
+				CalculatorEngine.MULTIPLICATION_SIGN_P_KEY.equals(key) ||
 				CalculatorEngine.ROUND_RESULT_P_KEY.equals(key) ||
 					CalculatorEngine.RESULT_PRECISION_P_KEY.equals(key) ||
 						CalculatorEngine.ANGLE_UNITS_P_KEY.equals(key) ||
@@ -568,5 +572,16 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 			CalculatorEngine.instance.reset(this, preferences);
 			this.calculatorModel.evaluate();
 		}
+
+		if ( CalculatorEngine.MULTIPLICATION_SIGN_P_KEY.equals(key) ) {
+			initMultiplicationButton();
+		}
+	}
+
+	private void initMultiplicationButton() {
+		final View multiplicationButton = findViewById(R.id.multiplicationButton);
+		if ( multiplicationButton instanceof Button) {
+			((Button) multiplicationButton).setText(CalculatorEngine.instance.getMultiplicationSign());
+		}
 	}
 }

src/main/java/org/solovyev/android/calculator/model/AbstractNumberBuilder.java

@@ -40,7 +40,11 @@ public abstract class AbstractNumberBuilder {
 	 * @return true if we can continue of processing of current number, if false - new number should be constructed
 	 */
 	protected boolean canContinue(@NotNull MathType.Result mathTypeResult) {
-		return ((mathTypeResult.getMathType().getGroupType() == MathType.MathGroupType.number && numeralBaseCheck(mathTypeResult) && numeralBaseInTheStart(mathTypeResult.getMathType()) || isSignAfterE(mathTypeResult)));
+		return ((mathTypeResult.getMathType().getGroupType() == MathType.MathGroupType.number && !spaceBefore(mathTypeResult) && numeralBaseCheck(mathTypeResult) && numeralBaseInTheStart(mathTypeResult.getMathType()) || isSignAfterE(mathTypeResult)));
+	}
+
+	private boolean spaceBefore(@NotNull MathType.Result mathTypeResult) {
+		return numberBuilder == null && mathTypeResult.getMatch().trim().isEmpty();
 	}
 
 	private boolean numeralBaseInTheStart(@NotNull MathType mathType) {

src/main/java/org/solovyev/android/calculator/model/CalculatorEngine.java

@@ -36,6 +36,9 @@ public enum CalculatorEngine {
 
 	public static final String GROUPING_SEPARATOR_P_KEY = "org.solovyev.android.calculator.CalculatorActivity_calc_grouping_separator";
 
+	public static final String MULTIPLICATION_SIGN_P_KEY = "org.solovyev.android.calculator.CalculatorActivity_calc_multiplication_sign";
+	public static final String MULTIPLICATION_SIGN_DEFAULT = "×";
+
 	public static final String ROUND_RESULT_P_KEY = "org.solovyev.android.calculator.CalculatorModel_round_result";
 	public static final boolean ROUND_RESULT_DEFAULT = true;
 
@@ -48,6 +51,7 @@ public enum CalculatorEngine {
 	public static final String ANGLE_UNITS_P_KEY = "org.solovyev.android.calculator.CalculatorActivity_angle_units";
 	public static final String ANGLE_UNITS_DEFAULT = "deg";
 
+
 	public static final int DEFAULT_TIMEOUT = 3000;
 
 	@NotNull
@@ -76,11 +80,23 @@ public enum CalculatorEngine {
 	// calculation thread timeout in milliseconds, after timeout thread would be interrupted
 	private int timeout = DEFAULT_TIMEOUT;
 
+	@NotNull
+	private String multiplicationSign = MULTIPLICATION_SIGN_DEFAULT;
+
 	CalculatorEngine() {
 		this.engine.setRoundResult(true);
 		this.engine.setUseGroupingSeparator(true);
 	}
 
+	@NotNull
+	public String getMultiplicationSign() {
+		return multiplicationSign;
+	}
+
+	public void setMultiplicationSign(@NotNull String multiplicationSign) {
+		this.multiplicationSign = multiplicationSign;
+	}
+
 	public static class Result {
 
 		@NotNull
@@ -256,6 +272,7 @@ public enum CalculatorEngine {
 				this.setRoundResult(preferences.getBoolean(ROUND_RESULT_P_KEY, ROUND_RESULT_DEFAULT));
 				this.setAngleUnits(getAngleUnitsFromPrefs(preferences));
 				this.setNumeralBase(getNumeralBaseFromPrefs(preferences));
+				this.setMultiplicationSign(preferences.getString(MULTIPLICATION_SIGN_P_KEY, MULTIPLICATION_SIGN_DEFAULT));
 
 				final String groupingSeparator = preferences.getString(GROUPING_SEPARATOR_P_KEY, JsclMathEngine.GROUPING_SEPARATOR_DEFAULT);
 				if (StringUtils.isEmpty(groupingSeparator)) {

src/main/java/org/solovyev/android/calculator/model/FromJsclSimplifyTextProcessor.java

@@ -53,7 +53,7 @@ public class FromJsclSimplifyTextProcessor implements TextProcessor<String, Gene
 				}
 
 				if (needMultiplicationSign(mathTypeBefore == null ? null : mathTypeBefore.getMathType(), mathTypeAfter == null ? null : mathTypeAfter.getMathType())) {
-					sb.append("×");
+					sb.append(CalculatorEngine.instance.getMultiplicationSign());
 				}
 
 			} else {

src/main/java/org/solovyev/android/view/widgets/ColorButton.java

@@ -90,7 +90,7 @@ public class ColorButton extends Button {
 		feedbackPaint.setStrokeWidth(2);
 
 
-		if (CollectionsUtils.contains(getText().toString(), Arrays.asList("+", "-", "/", "×"))) {
+		if (CollectionsUtils.contains(getText().toString(), Arrays.asList("+", "-", "/", "×", "*", "∙"))) {
 			getPaint().setColor(resources.getColor(R.color.button_operator_text_color));
 		} else if (getText().toString().equals("C"))  {
 			getPaint().setColor(resources.getColor(R.color.button_ce_text_color));

src/main/java/org/solovyev/android/view/widgets/DirectionDragButton.java

@@ -38,9 +38,6 @@ public class DirectionDragButton extends DragButton {
 	@NotNull
 	private final static String DEFAULT_DIRECTION_TEXT_SCALE = "0.33;0.33;0.33;0.33";
 
-	@Nullable
-	private String textMiddle;
-
 	protected static class DirectionTextData {
 
 		@NotNull
@@ -258,9 +255,6 @@ public class DirectionDragButton extends DragButton {
 			}
 		}
 
-		// backup text
-		this.textMiddle = String.valueOf(getText());
-
 		super.init(context);
 		initialized = true;
 	}
@@ -327,11 +321,6 @@ public class DirectionDragButton extends DragButton {
 		return getText(GuiDragDirection.down);
 	}
 
-	@Nullable
-	public String getTextMiddle() {
-		return textMiddle;
-	}
-
 	@Nullable
 	public String getText(@NotNull DragDirection direction) {
 		final GuiDragDirection guiDragDirection = GuiDragDirection.valueOf(direction);