changes

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

@@ -2,10 +2,8 @@ package org.solovyev.android.calculator;
 
 import android.content.Context;
 import android.content.Intent;
-import android.view.View;
 import android.widget.Toast;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 import org.solovyev.common.utils.StringUtils;
 
 /**
@@ -39,7 +37,7 @@ public class CalculatorActivityLauncher {
 		if (calculatorModel.getDisplay().isValid() ) {
 			final String varValue = calculatorModel.getDisplay().getText().toString();
 			if (!StringUtils.isEmpty(varValue)) {
-				if (CalculatorVarsActivity.isValid(varValue)) {
+				if (CalculatorVarsActivity.isValidValue(varValue)) {
 					final Intent intent = new Intent(context, CalculatorVarsActivity.class);
 					intent.putExtra(CalculatorVarsActivity.CREATE_VAR_EXTRA_STRING, varValue);
 					context.startActivity(intent);

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

@@ -16,9 +16,11 @@ import android.widget.*;
 import jscl.math.function.Function;
 import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.calculator.model.CalculatorEngine;
+import org.solovyev.android.calculator.model.Var;
 import org.solovyev.common.utils.StringUtils;
 
 import java.util.ArrayList;
+import java.util.Comparator;
 import java.util.List;
 
 /**
@@ -26,7 +28,7 @@ import java.util.List;
  * Date: 10/29/11
  * Time: 4:55 PM
  */
-public class CalculatorFunctionsActivity extends ListActivity{
+public class CalculatorFunctionsActivity extends ListActivity {
 
 	@NotNull
 	private FunctionsArrayAdapter adapter;
@@ -55,6 +57,19 @@ public class CalculatorFunctionsActivity extends ListActivity{
 			}
 		});
 
+		sort();
+
+	}
+
+	private void sort() {
+		CalculatorFunctionsActivity.this.adapter.sort(new Comparator<Function>() {
+			@Override
+			public int compare(Function function1, Function function2) {
+				return function1.getName().compareTo(function2.getName());
+			}
+		});
+
+		CalculatorFunctionsActivity.this.adapter.notifyDataSetChanged();
 	}
 
 	private class FunctionsArrayAdapter extends ArrayAdapter<Function> {

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

@@ -16,6 +16,9 @@ import android.text.Editable;
 import android.text.TextWatcher;
 import android.view.*;
 import android.widget.*;
+import jscl.text.Identifier;
+import jscl.text.MutableInt;
+import jscl.text.ParseException;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.math.MathType;
@@ -38,7 +41,7 @@ public class CalculatorVarsActivity extends ListActivity {
 
 	public static final String CREATE_VAR_EXTRA_STRING = "org.solovyev.android.calculator.CalculatorVarsActivity_create_var";
 
-	private final static List<Character> acceptableChars = Arrays.asList(StringUtils.toObject("1234567890abcdefghijklmnopqrstuvwxyzйцукенгшщзхъфывапролджэячсмитьбюё".toCharArray()));
+	private final static List<Character> acceptableChars = Arrays.asList(StringUtils.toObject("1234567890abcdefghijklmnopqrstuvwxyzйцукенгшщзхъфывапролджэячсмитьбюё_".toCharArray()));
 
 	@NotNull
 	private VarsArrayAdapter adapter;
@@ -208,7 +211,7 @@ public class CalculatorVarsActivity extends ListActivity {
 
 
 				final AndroidVarsRegistry varsRegistry = CalculatorEngine.instance.getVarsRegister();
-				if (!StringUtils.isEmpty(name)) {
+				if (isValidName(name)) {
 
 					boolean canBeSaved = false;
 
@@ -232,7 +235,7 @@ public class CalculatorVarsActivity extends ListActivity {
 								error = null;
 							} else {
 								// value is not empty => must be a number
-								boolean valid = isValid(value);
+								boolean valid = isValidValue(value);
 
 								if (valid) {
 									varBuilder.setName(name);
@@ -250,7 +253,7 @@ public class CalculatorVarsActivity extends ListActivity {
 						error = R.string.c_var_already_exists;
 					}
 				} else {
-					error = R.string.c_name_is_empty;
+					error = R.string.c_name_is_not_valid;
 				}
 
 				if (error != null) {
@@ -284,7 +287,22 @@ public class CalculatorVarsActivity extends ListActivity {
 		CalculatorVarsActivity.this.adapter.notifyDataSetChanged();
 	}
 
-	public static boolean isValid(@NotNull String value) {
+	private static boolean isValidName(@Nullable String name) {
+		boolean result = false;
+
+		if (!StringUtils.isEmpty(name)) {
+			try {
+				Identifier.parser.parse(name, new MutableInt(0));
+				result = true;
+			} catch (ParseException e) {
+				// not valid name;
+			}
+		}
+
+		return result;
+	}
+
+	public static boolean isValidValue(@NotNull String value) {
 		// now every string might be constant
 		return true;
 	}

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

@@ -18,7 +18,7 @@ import java.util.List;
 class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 
 	@NotNull
-	private static final Integer MAX_DEPTH = 10;
+	private static final Integer MAX_DEPTH = 20;
 
 	@Override
 	@NotNull
@@ -93,7 +93,9 @@ class ToJsclTextProcessor implements TextProcessor<PreparedExpression> {
 							assert value != null;
 
 							if ( var.getDoubleValue() != null ) {
-								result.append(value);
+								//result.append(value);
+								// NOTE: append varName as JSCL engine will convert it to double if needed
+								result.append(varName);
 							} else {
 								result.append("(").append(processWithDepth(value, depth, undefinedVars)).append(")");
 							}

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

@@ -189,16 +189,6 @@ public class Var implements IConstant {
 		this.id = id;
 	}
 
-	@Override
-	public boolean same(@Nullable MathEntity mathEntity) {
-		if (mathEntity instanceof IConstant) {
-			if (mathEntity.getId().equals(this.getId())) {
-				return true;
-			}
-		}
-		return false;
-	}
-
 	@NotNull
 	public String getName() {
 		return name;