Categories removed

app/src/main/java/org/solovyev/android/calculator/ActivityUi.java

@@ -34,13 +34,12 @@ import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
-import android.support.v7.app.AppCompatActivity;
 import android.util.DisplayMetrics;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
-
 import org.solovyev.android.Activities;
+import org.solovyev.android.Check;
 import org.solovyev.android.Views;
 import org.solovyev.android.calculator.language.Language;
 import org.solovyev.android.calculator.language.Languages;
@@ -227,6 +226,7 @@ public class ActivityUi extends BaseUi {
                        int captionResId,
                        int parentViewId) {
         final ActionBar actionBar = activity.getSupportActionBar();
+        Check.isNotNull(actionBar);
 
         final ActionBar.Tab tab = actionBar.newTab();
         tab.setTag(tag);

app/src/main/java/org/solovyev/android/calculator/AndroidFunctionCategory.java

@@ -1,61 +0,0 @@
-/*
- * Copyright 2013 serso aka se.solovyev
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * Contact details
- *
- * Email: se.solovyev@gmail.com
- * Site:  http://se.solovyev.org
- */
-
-package org.solovyev.android.calculator;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-/**
- * User: serso
- * Date: 10/7/12
- * Time: 7:17 PM
- */
-public enum AndroidFunctionCategory {
-
-    trigonometric(R.string.c_fun_category_trig),
-    hyperbolic_trigonometric(R.string.c_fun_category_hyper_trig),
-    comparison(R.string.c_fun_category_comparison),
-    my(R.string.c_fun_category_my),
-    common(R.string.c_fun_category_common);
-
-    private final int captionId;
-
-    AndroidFunctionCategory(int captionId) {
-        this.captionId = captionId;
-    }
-
-    @Nullable
-    public static AndroidFunctionCategory valueOf(@Nonnull FunctionCategory functionCategory) {
-        for (AndroidFunctionCategory androidFunctionCategory : values()) {
-            if (androidFunctionCategory.name().equals(functionCategory.name())) {
-                return androidFunctionCategory;
-            }
-        }
-
-        return null;
-    }
-
-    public int getCaptionId() {
-        return captionId;
-    }
-}

app/src/main/java/org/solovyev/android/calculator/AndroidOperatorCategory.java

@@ -1,60 +0,0 @@
-/*
- * Copyright 2013 serso aka se.solovyev
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * Contact details
- *
- * Email: se.solovyev@gmail.com
- * Site:  http://se.solovyev.org
- */
-
-package org.solovyev.android.calculator;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-/**
- * User: serso
- * Date: 10/7/12
- * Time: 7:41 PM
- */
-public enum AndroidOperatorCategory {
-
-    derivatives(R.string.derivatives),
-    other(R.string.other),
-    my(R.string.c_fun_category_my),
-    common(R.string.c_fun_category_common);
-
-    private final int captionId;
-
-    AndroidOperatorCategory(int captionId) {
-        this.captionId = captionId;
-    }
-
-    @Nullable
-    public static AndroidOperatorCategory valueOf(@Nonnull OperatorCategory operatorCategory) {
-        for (AndroidOperatorCategory androidOperatorCategory : values()) {
-            if (androidOperatorCategory.name().equals(operatorCategory.name())) {
-                return androidOperatorCategory;
-            }
-        }
-
-        return null;
-    }
-
-    public int getCaptionId() {
-        return captionId;
-    }
-}

app/src/main/java/org/solovyev/android/calculator/AndroidVarCategory.java

@@ -1,58 +0,0 @@
-/*
- * Copyright 2013 serso aka se.solovyev
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * Contact details
- *
- * Email: se.solovyev@gmail.com
- * Site:  http://se.solovyev.org
- */
-
-package org.solovyev.android.calculator;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-/**
- * User: serso
- * Date: 10/7/12
- * Time: 7:56 PM
- */
-public enum AndroidVarCategory {
-
-    system(R.string.c_var_system),
-    my(R.string.c_var_my);
-
-    private final int captionId;
-
-    AndroidVarCategory(int captionId) {
-        this.captionId = captionId;
-    }
-
-    @Nullable
-    public static AndroidVarCategory valueOf(@Nonnull VarCategory varCategory) {
-        for (AndroidVarCategory androidVarCategory : values()) {
-            if (androidVarCategory.name().equals(varCategory.name())) {
-                return androidVarCategory;
-            }
-        }
-
-        return null;
-    }
-
-    public int getCaptionId() {
-        return captionId;
-    }
-}

app/src/main/java/org/solovyev/android/calculator/Category.java

@@ -0,0 +1,16 @@
+package org.solovyev.android.calculator;
+
+import android.support.annotation.StringRes;
+
+import javax.annotation.Nonnull;
+
+public interface Category {
+
+    int ordinal();
+
+    @Nonnull
+    String name();
+
+    @StringRes
+    int title();
+}

app/src/main/java/org/solovyev/android/calculator/EditorView.java

@@ -28,27 +28,18 @@ import android.os.Build;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.util.AttributeSet;
-import android.util.Log;
 import android.view.ContextMenu;
-import android.widget.EditText;
-
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.onscreen.CalculatorOnscreenService;
-
+import org.solovyev.android.calculator.view.EditTextCompat;
-import java.lang.reflect.Method;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-public class EditorView extends EditText {
+public class EditorView extends EditTextCompat {
-
-    @Nonnull
-    private static final String TAG = App.subTag("EditorView");
 
     private boolean reportChanges;
     @Nullable
-    private Method setShowSoftInputOnFocusMethod;
-    @Nullable
     private Editor editor;
 
     public EditorView(Context context) {
@@ -123,28 +114,6 @@ public class EditorView extends EditText {
         editor.setSelection(start);
     }
 
-    public void setShowSoftInputOnFocusCompat(boolean show) {
-        Check.isMainThread();
-
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            setShowSoftInputOnFocus(show);
-        } else {
-            setShowSoftInputOnFocusPreLollipop(show);
-        }
-    }
-
-    private void setShowSoftInputOnFocusPreLollipop(boolean show) {
-        try {
-            if (setShowSoftInputOnFocusMethod == null) {
-                setShowSoftInputOnFocusMethod = EditText.class.getMethod("setShowSoftInputOnFocus", boolean.class);
-                setShowSoftInputOnFocusMethod.setAccessible(true);
-            }
-            setShowSoftInputOnFocusMethod.invoke(this, show);
-        } catch (Exception e) {
-            Log.w(TAG, e.getMessage(), e);
-        }
-    }
-
     private class MyTextWatcher implements TextWatcher {
         @Override
         public void beforeTextChanged(CharSequence s, int start, int count, int after) {

app/src/main/java/org/solovyev/android/calculator/Engine.java

@@ -23,9 +23,12 @@
 package org.solovyev.android.calculator;
 
 import android.content.SharedPreferences;
-
 import com.squareup.otto.Bus;
-
+import jscl.AngleUnit;
+import jscl.JsclMathEngine;
+import jscl.MathEngine;
+import jscl.NumeralBase;
+import jscl.math.operator.Operator;
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.model.EntityDao;
 import org.solovyev.android.calculator.model.Vars;
@@ -37,29 +40,21 @@ import org.solovyev.common.text.EnumMapper;
 import org.solovyev.common.text.NumberMapper;
 import org.solovyev.common.text.Strings;
 
+import javax.annotation.Nonnull;
+import javax.inject.Inject;
+import javax.inject.Singleton;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Executor;
 
-import javax.annotation.Nonnull;
-import javax.inject.Inject;
-import javax.inject.Singleton;
-
-import jscl.AngleUnit;
-import jscl.JsclMathEngine;
-import jscl.MathEngine;
-import jscl.NumeralBase;
-import jscl.math.function.IConstant;
-import jscl.math.operator.Operator;
-
 @Singleton
 public class Engine implements SharedPreferences.OnSharedPreferenceChangeListener {
 
     @Nonnull
     private final MathEngine mathEngine;
     @Nonnull
-    private final EntitiesRegistry<IConstant> varsRegistry;
+    private final VarsRegistry varsRegistry;
 
     @Nonnull
     private final EntitiesRegistry<Operator> operatorsRegistry;
@@ -76,7 +71,7 @@ public class Engine implements SharedPreferences.OnSharedPreferenceChangeListene
     @Nonnull
     private String multiplicationSign = Preferences.multiplicationSign.getDefaultValue();
 
-    public Engine(@Nonnull MathEngine mathEngine, @Nonnull EntitiesRegistry<IConstant> varsRegistry, @Nonnull FunctionsRegistry functionsRegistry, @Nonnull EntitiesRegistry<Operator> operatorsRegistry, @Nonnull EntitiesRegistry<Operator> postfixFunctionsRegistry) {
+    public Engine(@Nonnull MathEngine mathEngine, @Nonnull VarsRegistry varsRegistry, @Nonnull FunctionsRegistry functionsRegistry, @Nonnull EntitiesRegistry<Operator> operatorsRegistry, @Nonnull EntitiesRegistry<Operator> postfixFunctionsRegistry) {
         this.mathEngine = mathEngine;
         this.varsRegistry = varsRegistry;
         this.functionsRegistry = functionsRegistry;
@@ -111,7 +106,7 @@ public class Engine implements SharedPreferences.OnSharedPreferenceChangeListene
     }
 
     @Nonnull
-    public EntitiesRegistry<IConstant> getVarsRegistry() {
+    public VarsRegistry getVarsRegistry() {
         return varsRegistry;
     }
 

app/src/main/java/org/solovyev/android/calculator/EntitiesRegistry.java

@@ -34,7 +34,7 @@ public interface EntitiesRegistry<E extends MathEntity> extends MathRegistry<E>
     String getDescription(@Nonnull String name);
 
     @Nullable
-    String getCategory(@Nonnull E entity);
+    Category getCategory(@Nonnull E entity);
 
     void init();
 

app/src/main/java/org/solovyev/android/calculator/FunctionCategory.java

@@ -22,6 +22,7 @@
 
 package org.solovyev.android.calculator;
 
+import android.support.annotation.StringRes;
 import jscl.math.function.ArcTrigonometric;
 import jscl.math.function.Comparison;
 import jscl.math.function.Function;
@@ -31,21 +32,16 @@ import org.solovyev.common.collections.Collections;
 import javax.annotation.Nonnull;
 import java.util.*;
 
-/**
+public enum FunctionCategory implements Category {
- * User: serso
- * Date: 10/7/12
- * Time: 7:15 PM
- */
-public enum FunctionCategory {
 
-    trigonometric(100) {
+    trigonometric(100, R.string.c_fun_category_trig) {
         @Override
         public boolean isInCategory(@Nonnull Function function) {
             return (function instanceof Trigonometric || function instanceof ArcTrigonometric) && !hyperbolic_trigonometric.isInCategory(function);
         }
     },
 
-    hyperbolic_trigonometric(300) {
+    hyperbolic_trigonometric(300, R.string.c_fun_category_hyper_trig) {
 
         private final Set<String> names = new HashSet<>(Arrays.asList("sinh", "cosh", "tanh", "coth", "asinh", "acosh", "atanh", "acoth"));
 
@@ -55,21 +51,21 @@ public enum FunctionCategory {
         }
     },
 
-    comparison(200) {
+    comparison(200, R.string.c_fun_category_comparison) {
         @Override
         public boolean isInCategory(@Nonnull Function function) {
             return function instanceof Comparison;
         }
     },
 
-    my(0) {
+    my(0, R.string.c_fun_category_my) {
         @Override
         public boolean isInCategory(@Nonnull Function function) {
             return !function.isSystem();
         }
     },
 
-    common(50) {
+    common(50, R.string.c_fun_category_common) {
         @Override
         public boolean isInCategory(@Nonnull Function function) {
             for (FunctionCategory category : values()) {
@@ -84,10 +80,12 @@ public enum FunctionCategory {
         }
     };
 
-    private final int tabOrder;
+    public final int tabOrder;
+    public final int title;
 
-    FunctionCategory(int tabOrder) {
+    FunctionCategory(int tabOrder, @StringRes int title) {
         this.tabOrder = tabOrder;
+        this.title = title;
     }
 
     @Nonnull
@@ -104,5 +102,10 @@ public enum FunctionCategory {
         return result;
     }
 
+    @Override
+    public int title() {
+        return title;
+    }
+
     public abstract boolean isInCategory(@Nonnull Function function);
 }

app/src/main/java/org/solovyev/android/calculator/FunctionsRegistry.java

@@ -26,9 +26,10 @@ import android.app.Application;
 import android.content.SharedPreferences;
 import android.os.Handler;
 import android.support.annotation.NonNull;
-
 import com.squareup.otto.Bus;
-
+import jscl.JsclMathEngine;
+import jscl.math.function.CustomFunction;
+import jscl.math.function.Function;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.simpleframework.xml.Serializer;
@@ -42,25 +43,15 @@ import org.solovyev.android.io.FileSaver;
 import org.solovyev.common.JBuilder;
 import org.solovyev.common.text.Strings;
 
-import java.io.File;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.Executor;
-
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.inject.Named;
 import javax.inject.Singleton;
-
+import java.io.File;
-import jscl.JsclMathEngine;
+import java.io.IOException;
-import jscl.math.function.CustomFunction;
+import java.util.*;
-import jscl.math.function.Function;
+import java.util.concurrent.Executor;
 
 import static android.text.TextUtils.isEmpty;
 
@@ -186,10 +177,10 @@ public class FunctionsRegistry extends BaseEntitiesRegistry<Function, OldFunctio
     }
 
     @Override
-    public String getCategory(@Nonnull Function function) {
+    public Category getCategory(@Nonnull Function function) {
         for (FunctionCategory category : FunctionCategory.values()) {
             if (category.isInCategory(function)) {
-                return category.name();
+                return category;
             }
         }
 

app/src/main/java/org/solovyev/android/calculator/KeyboardWindow.java

@@ -28,8 +28,7 @@ public class KeyboardWindow {
     private static void hideIme(@NonNull View view) {
         final IBinder token = view.getWindowToken();
         if (token != null) {
-            InputMethodManager imm = (InputMethodManager) view.getContext().getSystemService(
+            InputMethodManager imm = (InputMethodManager) view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
-                    Context.INPUT_METHOD_SERVICE);
             imm.hideSoftInputFromWindow(token, 0);
         }
     }
@@ -45,12 +44,13 @@ public class KeyboardWindow {
     }
 
     public void show(@NonNull KeyboardUi.User user, @Nullable Dialog dialog, @NonNull List<String> parameterNames) {
+        final EditText editor = user.getEditor();
         if (isShown()) {
+            hideIme(editor);
             return;
         }
         this.dialog = dialog;
         moveDialog(Gravity.TOP);
-        final EditText editor = user.getEditor();
         hideIme(editor);
         final Context context = editor.getContext();
         final LinearLayout view = new LinearLayout(context);

app/src/main/java/org/solovyev/android/calculator/OperatorCategory.java

@@ -22,49 +22,38 @@
 
 package org.solovyev.android.calculator;
 
+import android.support.annotation.StringRes;
+import jscl.math.operator.*;
 import org.solovyev.common.collections.Collections;
 
+import javax.annotation.Nonnull;
 import java.util.Comparator;
 import java.util.List;
 
-import javax.annotation.Nonnull;
+public enum OperatorCategory implements Category {
 
-import jscl.math.operator.Derivative;
+    derivatives(100, R.string.derivatives) {
-import jscl.math.operator.IndefiniteIntegral;
-import jscl.math.operator.Integral;
-import jscl.math.operator.Operator;
-import jscl.math.operator.Product;
-import jscl.math.operator.Sum;
-
-/**
- * User: serso
- * Date: 10/7/12
- * Time: 7:40 PM
- */
-public enum OperatorCategory {
-
-    derivatives(100) {
         @Override
         public boolean isInCategory(@Nonnull Operator operator) {
             return operator instanceof Derivative || operator instanceof Integral || operator instanceof IndefiniteIntegral;
         }
     },
 
-    other(200) {
+    other(200, R.string.other) {
         @Override
         public boolean isInCategory(@Nonnull Operator operator) {
             return operator instanceof Sum || operator instanceof Product;
         }
     },
 
-    my(0) {
+    my(0, R.string.c_fun_category_my) {
         @Override
         public boolean isInCategory(@Nonnull Operator operator) {
             return !operator.isSystem();
         }
     },
 
-    common(50) {
+    common(50, R.string.c_fun_category_common) {
         @Override
         public boolean isInCategory(@Nonnull Operator operator) {
             for (OperatorCategory category : values()) {
@@ -80,9 +69,12 @@ public enum OperatorCategory {
     };
 
     private final int tabOrder;
+    @StringRes
+    private final int title;
 
-    OperatorCategory(int tabOrder) {
+    OperatorCategory(int tabOrder, @StringRes int title) {
         this.tabOrder = tabOrder;
+        this.title = title;
     }
 
     @Nonnull
@@ -102,5 +94,12 @@ public enum OperatorCategory {
         return result;
     }
 
+
+
     public abstract boolean isInCategory(@Nonnull Operator operator);
+
+    @Override
+    public int title() {
+        return title;
+    }
 }

app/src/main/java/org/solovyev/android/calculator/OperatorsRegistry.java

@@ -57,10 +57,10 @@ public class OperatorsRegistry extends BaseEntitiesRegistry<Operator, PersistedE
     }
 
     @Override
-    public String getCategory(@Nonnull Operator operator) {
+    public Category getCategory(@Nonnull Operator operator) {
         for (OperatorCategory category : OperatorCategory.values()) {
             if (category.isInCategory(operator)) {
-                return category.name();
+                return category;
             }
         }
         return null;

app/src/main/java/org/solovyev/android/calculator/PostfixFunctionsRegistry.java

@@ -55,10 +55,10 @@ public class PostfixFunctionsRegistry extends BaseEntitiesRegistry<Operator, Per
     }
 
     @Override
-    public String getCategory(@Nonnull Operator operator) {
+    public Category getCategory(@Nonnull Operator operator) {
         for (OperatorCategory category : OperatorCategory.values()) {
             if (category.isInCategory(operator)) {
-                return category.name();
+                return category;
             }
         }
         return null;

app/src/main/java/org/solovyev/android/calculator/VarCategory.java

@@ -22,30 +22,24 @@
 
 package org.solovyev.android.calculator;
 
+import android.support.annotation.StringRes;
+import jscl.math.function.IConstant;
 import org.solovyev.common.collections.Collections;
 
+import javax.annotation.Nonnull;
 import java.util.Comparator;
 import java.util.List;
 
-import javax.annotation.Nonnull;
+public enum VarCategory implements Category {
 
-import jscl.math.function.IConstant;
+    system(100, R.string.c_var_system) {
-
-/**
- * User: serso
- * Date: 12/22/11
- * Time: 4:25 PM
- */
-public enum VarCategory {
-
-    system(100) {
         @Override
         public boolean isInCategory(@Nonnull IConstant var) {
             return var.isSystem();
         }
     },
 
-    my(0) {
+    my(0, R.string.c_var_my) {
         @Override
         public boolean isInCategory(@Nonnull IConstant var) {
             return !var.isSystem();
@@ -53,9 +47,12 @@ public enum VarCategory {
     };
 
     private final int tabOrder;
+    @StringRes
+    private final int title;
 
-    VarCategory(int tabOrder) {
+    VarCategory(int tabOrder, @StringRes int title) {
         this.tabOrder = tabOrder;
+        this.title = title;
     }
 
     @Nonnull
@@ -73,4 +70,10 @@ public enum VarCategory {
     }
 
     public abstract boolean isInCategory(@Nonnull IConstant var);
+
+
+    @Override
+    public int title() {
+        return title;
+    }
 }

app/src/main/java/org/solovyev/android/calculator/VarsRegistry.java

@@ -129,10 +129,10 @@ public class VarsRegistry extends BaseEntitiesRegistry<IConstant, Var> {
     }
 
     @Override
-    public String getCategory(@Nonnull IConstant var) {
+    public Category getCategory(@Nonnull IConstant var) {
         for (VarCategory category : VarCategory.values()) {
             if (category.isInCategory(var)) {
-                return category.name();
+                return category;
             }
         }
 

app/src/main/java/org/solovyev/android/calculator/function/EditFunctionFragment.java

@@ -44,12 +44,12 @@ import butterknife.Bind;
 import butterknife.ButterKnife;
 import jscl.math.function.CustomFunction;
 import jscl.math.function.Function;
-import jscl.math.function.IConstant;
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.*;
 import org.solovyev.android.calculator.math.edit.CalculatorFunctionsActivity;
 import org.solovyev.android.calculator.math.edit.FunctionsFragment;
 import org.solovyev.android.calculator.math.edit.VarEditorSaver;
+import org.solovyev.android.calculator.view.EditTextCompat;
 import org.solovyev.common.math.MathRegistry;
 
 import javax.annotation.Nonnull;
@@ -67,9 +67,7 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
     private static final int MENU_CATEGORY = Menu.FIRST + 2;
 
     @NonNull
-    private final MathRegistry<Function> functionsRegistry = Locator.getInstance().getEngine().getFunctionsRegistry();
+    private final VarsRegistry constantsRegistry = Locator.getInstance().getEngine().getVarsRegistry();
-    @NonNull
-    private final MathRegistry<IConstant> constantsRegistry = Locator.getInstance().getEngine().getVarsRegistry();
     @NonNull
     private final KeyboardWindow keyboardWindow = new KeyboardWindow();
     @NonNull
@@ -83,13 +81,13 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
     @Bind(R.id.function_body_label)
     TextInputLayout bodyLabel;
     @Bind(R.id.function_body)
-    EditText bodyView;
+    EditTextCompat bodyView;
     @Bind(R.id.function_description)
     EditText descriptionView;
     @Inject
     Calculator calculator;
     @Inject
-    FunctionsRegistry registry;
+    FunctionsRegistry functionsRegistry;
     @Nullable
     private CppFunction function;
 
@@ -175,6 +173,7 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
             }
         });
         if (!isNewFunction()) {
+            Check.isNotNull(function);
             final Button neutral = dialog.getButton(AlertDialog.BUTTON_NEUTRAL);
             neutral.setOnClickListener(new View.OnClickListener() {
                 @Override
@@ -191,7 +190,7 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
             return;
         }
         final CustomFunction entity = function.toCustomFunctionBuilder().create();
-        registry.remove(entity);
+        functionsRegistry.remove(entity);
         calculator.fireCalculatorEvent(CalculatorEventType.function_removed, entity, this);
         dismiss();
     }
@@ -293,8 +292,8 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
                     .withId(isNewFunction() ? NO_ID : function.id)
                     .withParameters(collectParameters())
                     .withDescription(descriptionView.getText().toString()).build();
-            final Function oldFunction = isNewFunction() ? null : registry.getById(function.id);
+            final Function oldFunction = isNewFunction() ? null : functionsRegistry.getById(function.id);
-            registry.add(newFunction.toCustomFunctionBuilder(), oldFunction);
+            functionsRegistry.add(newFunction.toCustomFunctionBuilder(), oldFunction);
             return true;
         } catch (RuntimeException e) {
             setError(bodyLabel, e.getLocalizedMessage());
@@ -312,7 +311,7 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
             setError(nameLabel, getString(R.string.function_name_is_not_valid));
             return false;
         }
-        final Function existingFunction = registry.get(name);
+        final Function existingFunction = functionsRegistry.get(name);
         if (existingFunction != null) {
             if (!existingFunction.isIdDefined()) {
                 Check.shouldNotHappen();
@@ -385,6 +384,7 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
         bodyView.setOnClickListener(this);
         bodyView.setOnFocusChangeListener(this);
         bodyView.setOnKeyListener(this);
+        bodyView.setShowSoftInputOnFocusCompat(false);
         descriptionView.setOnFocusChangeListener(this);
 
         return view;
@@ -564,9 +564,10 @@ public class EditFunctionFragment extends BaseDialogFragment implements View.OnC
                     bodyView.post(new Runnable() {
                         @Override
                         public void run() {
-                            if (item.getItemId() == MENU_FUNCTION) {
+                            final int itemId = item.getItemId();
+                            if (itemId == MENU_FUNCTION) {
                                 showFunctions(bodyView);
-                            } else {
+                            } else if (itemId == MENU_CONSTANT) {
                                 showConstants(bodyView);
                             }
                         }

app/src/main/java/org/solovyev/android/calculator/math/edit/BaseEntitiesFragment.java

@@ -31,34 +31,27 @@ import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.text.ClipboardManager;
 import android.text.TextUtils;
-import android.view.ContextMenu;
+import android.view.*;
-import android.view.LayoutInflater;
-import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
 import android.widget.TextView;
-
+import butterknife.Bind;
+import butterknife.ButterKnife;
 import com.melnykov.fab.FloatingActionButton;
-
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.BaseFragment;
 import org.solovyev.android.calculator.CalculatorFragmentType;
+import org.solovyev.android.calculator.Category;
 import org.solovyev.android.calculator.R;
 import org.solovyev.android.views.llm.DividerItemDecoration;
 import org.solovyev.common.math.MathEntity;
 import org.solovyev.common.text.Strings;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-import butterknife.Bind;
-import butterknife.ButterKnife;
-
 
 public abstract class BaseEntitiesFragment<E extends MathEntity> extends BaseFragment {
 
@@ -140,14 +133,18 @@ public abstract class BaseEntitiesFragment<E extends MathEntity> extends BaseFra
     }
 
     private boolean isInCategory(@NonNull E entity, @NonNull String category) {
-        return TextUtils.equals(getCategory(entity), category);
+        final Category entityCategory = getCategory(entity);
+        if (entityCategory == null) {
+            return false;
+        }
+        return TextUtils.equals(entityCategory.name(), category);
     }
 
     @Nonnull
     protected abstract List<E> getEntities();
 
     @Nullable
-    abstract String getCategory(@Nonnull E e);
+    abstract Category getCategory(@Nonnull E e);
 
     protected EntitiesAdapter getAdapter() {
         return adapter;

app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorFunctionsActivity.java

@@ -23,9 +23,6 @@
 package org.solovyev.android.calculator.math.edit;
 
 import android.os.Bundle;
-import android.util.Log;
-
-import org.solovyev.android.calculator.AndroidFunctionCategory;
 import org.solovyev.android.calculator.BaseActivity;
 import org.solovyev.android.calculator.CalculatorFragmentType;
 import org.solovyev.android.calculator.FunctionCategory;
@@ -48,22 +45,16 @@ public class CalculatorFunctionsActivity extends BaseActivity {
         final CalculatorFragmentType fragmentType = CalculatorFragmentType.functions;
 
         for (FunctionCategory category : FunctionCategory.getCategoriesByTabOrder()) {
-            final AndroidFunctionCategory androidCategory = AndroidFunctionCategory.valueOf(category);
+            final Bundle fragmentParameters;
-            if (androidCategory != null) {
 
-                final Bundle fragmentParameters;
+            if (category == FunctionCategory.my && bundle != null) {
-
+                BaseEntitiesFragment.putCategory(bundle, category.name());
-                if (category == FunctionCategory.my && bundle != null) {
+                fragmentParameters = bundle;
-                    BaseEntitiesFragment.putCategory(bundle, category.name());
-                    fragmentParameters = bundle;
-                } else {
-                    fragmentParameters = BaseEntitiesFragment.createBundleFor(category.name());
-                }
-
-                ui.addTab(this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), fragmentParameters, androidCategory.getCaptionId(), R.id.main_layout);
             } else {
-                Log.e(CalculatorFunctionsActivity.class.getSimpleName(), "Unable to find android function category for " + category);
+                fragmentParameters = BaseEntitiesFragment.createBundleFor(category.name());
             }
+
+            ui.addTab(this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), fragmentParameters, category.title, R.id.main_layout);
         }
     }
 }

app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorOperatorsActivity.java

@@ -24,7 +24,6 @@ package org.solovyev.android.calculator.math.edit;
 
 import android.os.Bundle;
 
-import org.solovyev.android.calculator.AndroidOperatorCategory;
 import org.solovyev.android.calculator.BaseActivity;
 import org.solovyev.android.calculator.CalculatorEventData;
 import org.solovyev.android.calculator.CalculatorEventListener;
@@ -49,12 +48,7 @@ public class CalculatorOperatorsActivity extends BaseActivity implements Calcula
         final CalculatorFragmentType fragmentType = CalculatorFragmentType.operators;
 
         for (OperatorCategory category : OperatorCategory.getCategoriesByTabOrder()) {
-            final AndroidOperatorCategory androidCategory = AndroidOperatorCategory.valueOf(category);
+            ui.addTab(this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), BaseEntitiesFragment.createBundleFor(category.name()), category.title(), R.id.main_layout);
-            if (androidCategory != null) {
-                ui.addTab(this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), BaseEntitiesFragment.createBundleFor(category.name()), androidCategory.getCaptionId(), R.id.main_layout);
-            } else {
-                ui.logError("Unable to find android operator category for " + category);
-            }
         }
     }
 

app/src/main/java/org/solovyev/android/calculator/math/edit/CalculatorVarsActivity.java

@@ -25,7 +25,6 @@ package org.solovyev.android.calculator.math.edit;
 import android.content.Intent;
 import android.os.Bundle;
 
-import org.solovyev.android.calculator.AndroidVarCategory;
 import org.solovyev.android.calculator.BaseActivity;
 import org.solovyev.android.calculator.CalculatorEventData;
 import org.solovyev.android.calculator.CalculatorEventListener;
@@ -68,15 +67,7 @@ public class CalculatorVarsActivity extends BaseActivity implements CalculatorEv
             } else {
                 fragmentParameters = BaseEntitiesFragment.createBundleFor(category.name());
             }
-
+            ui.addTab(this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), fragmentParameters, category.title(), R.id.main_layout);
-
-            final AndroidVarCategory androidVarCategory = AndroidVarCategory.valueOf(category);
-
-            if (androidVarCategory != null) {
-                ui.addTab(this, fragmentType.createSubFragmentTag(category.name()), fragmentType.getFragmentClass(), fragmentParameters, androidVarCategory.getCaptionId(), R.id.main_layout);
-            } else {
-                ui.logError("Unable to find android var category for " + category);
-            }
         }
     }
 

app/src/main/java/org/solovyev/android/calculator/math/edit/FunctionsFragment.java

@@ -34,13 +34,7 @@ import android.view.ViewGroup;
 import com.squareup.otto.Bus;
 import com.squareup.otto.Subscribe;
 
-import org.solovyev.android.calculator.AppComponent;
+import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.Calculator;
-import org.solovyev.android.calculator.CalculatorFragmentType;
-import org.solovyev.android.calculator.EntitiesRegistry;
-import org.solovyev.android.calculator.FunctionsRegistry;
-import org.solovyev.android.calculator.Keyboard;
-import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.function.CppFunction;
 import org.solovyev.android.calculator.function.EditFunctionFragment;
 import org.solovyev.common.text.Strings;
@@ -165,7 +159,7 @@ public class FunctionsFragment extends BaseEntitiesFragment<Function> {
     }
 
     @Override
-    protected String getCategory(@Nonnull Function function) {
+    protected Category getCategory(@Nonnull Function function) {
         return registry.getCategory(function);
     }
 

app/src/main/java/org/solovyev/android/calculator/math/edit/OperatorsFragment.java

@@ -23,24 +23,16 @@
 package org.solovyev.android.calculator.math.edit;
 
 import android.support.annotation.NonNull;
-import android.text.TextUtils;
 import android.view.ContextMenu;
 import android.view.MenuItem;
-
+import jscl.math.operator.Operator;
-import org.solovyev.android.calculator.CalculatorEventType;
+import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.CalculatorFragmentType;
-import org.solovyev.android.calculator.EntitiesRegistry;
-import org.solovyev.android.calculator.Locator;
-import org.solovyev.android.calculator.R;
 import org.solovyev.common.text.Strings;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-
+import java.util.ArrayList;
-import jscl.math.operator.Operator;
+import java.util.List;
 
 public class OperatorsFragment extends BaseEntitiesFragment<Operator> {
 
@@ -70,9 +62,9 @@ public class OperatorsFragment extends BaseEntitiesFragment<Operator> {
     }
 
     @Override
-    protected String getCategory(@Nonnull Operator operator) {
+    protected Category getCategory(@Nonnull Operator operator) {
-        final String result = operatorsRegistry.getCategory(operator);
+        final Category result = operatorsRegistry.getCategory(operator);
-        if (!TextUtils.isEmpty(result)) {
+        if (result != null) {
             return result;
         }
         return postfixFunctionsRegistry.getCategory(operator);

app/src/main/java/org/solovyev/android/calculator/math/edit/VarsFragment.java

@@ -120,7 +120,7 @@ public class VarsFragment extends BaseEntitiesFragment<IConstant>implements Calc
     }
 
     @Override
-    protected String getCategory(@Nonnull IConstant var) {
+    protected Category getCategory(@Nonnull IConstant var) {
         return registry.getCategory(var);
     }
 

app/src/main/java/org/solovyev/android/calculator/view/EditTextCompat.java

@@ -0,0 +1,57 @@
+package org.solovyev.android.calculator.view;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.widget.EditText;
+import org.solovyev.android.Check;
+
+import javax.annotation.Nullable;
+import java.lang.reflect.Method;
+
+public class EditTextCompat extends EditText {
+
+    @Nullable
+    private Method setShowSoftInputOnFocusMethod;
+
+    public EditTextCompat(Context context) {
+        super(context);
+    }
+
+    public EditTextCompat(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public EditTextCompat(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public EditTextCompat(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public void setShowSoftInputOnFocusCompat(boolean show) {
+        Check.isMainThread();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            setShowSoftInputOnFocus(show);
+        } else {
+            setShowSoftInputOnFocusPreLollipop(show);
+        }
+    }
+
+    private void setShowSoftInputOnFocusPreLollipop(boolean show) {
+        try {
+            if (setShowSoftInputOnFocusMethod == null) {
+                setShowSoftInputOnFocusMethod = EditText.class.getMethod("setShowSoftInputOnFocus", boolean.class);
+                setShowSoftInputOnFocusMethod.setAccessible(true);
+            }
+            setShowSoftInputOnFocusMethod.invoke(this, show);
+        } catch (Exception e) {
+            Log.w("EditTextCompat", e.getMessage(), e);
+        }
+    }
+}

app/src/main/res/layout/fragment_function_edit.xml

@@ -55,11 +55,12 @@
             a:layout_width="match_parent"
             a:layout_height="wrap_content">
 
-            <EditText
+            <org.solovyev.android.calculator.view.EditTextCompat
                 a:id="@+id/function_body"
                 a:layout_width="match_parent"
                 a:layout_height="wrap_content"
                 a:hint="@string/c_function_value"
+                a:imeOptions="flagNoExtractUi"
                 a:inputType="text" />
         </android.support.design.widget.TextInputLayout>