Plotter

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

@@ -28,7 +28,11 @@ import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.support.annotation.NonNull;
-
+import android.text.TextUtils;
+import dagger.Lazy;
+import jscl.math.Generic;
+import jscl.math.function.Constant;
+import jscl.math.function.CustomFunction;
 import org.solovyev.android.Activities;
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.about.AboutActivity;
@@ -38,31 +42,40 @@ import org.solovyev.android.calculator.functions.FunctionsActivity;
 import org.solovyev.android.calculator.history.HistoryActivity;
 import org.solovyev.android.calculator.matrix.CalculatorMatrixActivity;
 import org.solovyev.android.calculator.operators.OperatorsActivity;
-import org.solovyev.android.calculator.plot.CalculatorPlotter;
+import org.solovyev.android.calculator.plot.ExpressionFunction;
 import org.solovyev.android.calculator.plot.PlotActivity;
 import org.solovyev.android.calculator.preferences.PreferencesActivity;
 import org.solovyev.android.calculator.variables.CppVariable;
 import org.solovyev.android.calculator.variables.EditVariableFragment;
 import org.solovyev.android.calculator.variables.VariablesActivity;
 import org.solovyev.android.calculator.variables.VariablesFragment;
+import org.solovyev.android.plotter.Plotter;
 import org.solovyev.common.msg.MessageType;
 import org.solovyev.common.text.Strings;
 
-import jscl.math.Generic;
-import jscl.math.function.Constant;
-
-import java.util.Set;
-
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.inject.Singleton;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
 
 @Singleton
 public final class ActivityLauncher implements CalculatorEventListener {
 
     @Inject
     Application application;
+    @Inject
+    Lazy<Plotter> plotter;
+    @Inject
+    Lazy<ErrorReporter> errorReporter;
+    @Inject
+    Lazy<Display> display;
+    @Inject
+    Lazy<VariablesRegistry> variablesRegistry;
+    @Inject
+    Notifier notifier;
     @Nullable
     private CalculatorActivity activity;
 
@@ -109,7 +122,7 @@ public final class ActivityLauncher implements CalculatorEventListener {
                 final CppFunction.Builder builder = CppFunction.builder("", functionBody);
                 final Generic generic = viewState.getResult();
                 if (generic != null) {
-                    final Set<Constant> constants = CalculatorUtils.getNotSystemConstants(generic);
+                    final Set<Constant> constants = generic.getUndefinedConstants(null);
                     for (Constant constant : constants) {
                         builder.withParameter(constant.getName());
                     }
@@ -128,26 +141,13 @@ public final class ActivityLauncher implements CalculatorEventListener {
         return ((CalculatorApplication) App.getApplication()).notifier;
     }
 
-    public static void tryPlot() {
+    public void plotDisplayedExpression() {
-        final CalculatorPlotter plotter = Locator.getInstance().getPlotter();
+        final DisplayState state = display.get().getState();
-        final Display display = App.getDisplay();
+        if (!state.valid) {
-        final DisplayState viewState = display.getState();
-
-        if (viewState.valid) {
-            final String functionValue = viewState.text;
-            final Generic expression = viewState.getResult();
-            if (!Strings.isEmpty(functionValue) && expression != null) {
-                if (plotter.isPlotPossibleFor(expression)) {
-                    plotter.plot(expression);
-                } else {
-                    getNotifier().showMessage(R.string.cpp_plot_too_many_variables, MessageType.error);
-                }
-            } else {
-                getNotifier().showMessage(R.string.cpp_plot_empty_function_error, MessageType.error);
-            }
-        } else {
             getNotifier().showMessage(R.string.not_valid_result, MessageType.error);
+            return;
         }
+        plot(state.getResult());
     }
 
     public void showHistory() {
@@ -161,7 +161,7 @@ public final class ActivityLauncher implements CalculatorEventListener {
     public void showWidgetSettings() {
         final Context context = getContext();
         show(context, PreferencesActivity.makeIntent(context, R.xml.preferences_widget,
-            R.string.prefs_widget_title));
+                R.string.prefs_widget_title));
     }
 
     public void showOperators() {
@@ -258,4 +258,44 @@ public final class ActivityLauncher implements CalculatorEventListener {
         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
         context.startActivity(intent);
     }
+
+    void plot(@Nullable Generic expression) {
+        if (expression == null) {
+            notifier.showMessage(R.string.cpp_plot_empty_function_error);
+            return;
+        }
+        final String content = expression.toString();
+        if (TextUtils.isEmpty(content)) {
+            notifier.showMessage(R.string.cpp_plot_empty_function_error);
+            return;
+        }
+        final List<String> parameters = new ArrayList<>();
+        for (Constant parameter : expression.getUndefinedConstants(variablesRegistry.get())) {
+            parameters.add(parameter.getName());
+        }
+        if (parameters.size() > 2) {
+            notifier.showMessage(R.string.cpp_plot_too_many_variables);
+            return;
+        }
+
+        try {
+            final CustomFunction f = new CustomFunction.Builder().setName("").setParameterNames(parameters).setContent(content).create();
+            final ExpressionFunction ef = new ExpressionFunction(f, false);
+            plotter.get().add(ef);
+            showPlotter();
+        } catch (RuntimeException e) {
+            errorReporter.get().onException(e);
+            notifier.showMessage(e.getLocalizedMessage());
+        }
+    }
+
+    public boolean canPlot(@Nullable Generic expression) {
+        if (expression == null || TextUtils.isEmpty(expression.toString())) {
+            return false;
+        }
+        if (expression.getUndefinedConstants(variablesRegistry.get()).size() > 2) {
+            return false;
+        }
+        return true;
+    }
 }

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

@@ -27,9 +27,8 @@ import android.os.Handler;
 import android.preference.PreferenceManager;
 import android.util.Log;
 import android.util.TimingLogger;
-
 import com.squareup.otto.Bus;
-
+import jscl.MathEngine;
 import org.acra.ACRA;
 import org.acra.ACRAConfiguration;
 import org.acra.sender.HttpSender;
@@ -38,18 +37,13 @@ import org.solovyev.android.calculator.floating.FloatingCalculatorActivity;
 import org.solovyev.android.calculator.history.History;
 import org.solovyev.android.calculator.language.Language;
 import org.solovyev.android.calculator.language.Languages;
-import org.solovyev.android.calculator.plot.AndroidCalculatorPlotter;
-import org.solovyev.android.calculator.plot.CalculatorPlotterImpl;
 import org.solovyev.common.msg.MessageType;
 
-import jscl.MathEngine;
-
-import java.util.Locale;
-import java.util.concurrent.Executor;
-
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 import javax.inject.Named;
+import java.util.Locale;
+import java.util.concurrent.Executor;
 
 public class CalculatorApplication extends android.app.Application implements SharedPreferences.OnSharedPreferenceChangeListener {
 
@@ -143,11 +137,7 @@ public class CalculatorApplication extends android.app.Application implements Sh
         languages.updateContextLocale(this, true);
         App.getGa().reportInitially(preferences);
 
-        Locator.getInstance().init(calculator,
+        Locator.getInstance().init(calculator, engine, keyboard);
-                engine,
-                keyboard,
-                new AndroidCalculatorPlotter(this, new CalculatorPlotterImpl(calculator))
-        );
 
         calculator.init(initThread);
 

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

@@ -22,16 +22,13 @@
 
 package org.solovyev.android.calculator;
 
-import org.solovyev.android.calculator.plot.CalculatorPlotter;
-
 import javax.annotation.Nonnull;
 
 public interface CalculatorLocator {
 
     void init(@Nonnull Calculator calculator,
               @Nonnull Engine engine,
-              @Nonnull Keyboard keyboard,
+              @Nonnull Keyboard keyboard);
-              @Nonnull CalculatorPlotter plotter);
 
     @Nonnull
     Calculator getCalculator();
@@ -42,6 +39,4 @@ public interface CalculatorLocator {
     @Nonnull
     Keyboard getKeyboard();
 
-    @Nonnull
-    CalculatorPlotter getPlotter();
 }

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

@@ -22,15 +22,6 @@
 
 package org.solovyev.android.calculator;
 
-import jscl.math.Generic;
-import jscl.math.function.Constant;
-import jscl.math.function.IConstant;
-
-import java.util.HashSet;
-import java.util.Set;
-
-import javax.annotation.Nonnull;
-
 /**
  * User: serso
  * Date: 9/22/12
@@ -42,18 +33,4 @@ public final class CalculatorUtils {
         throw new AssertionError();
     }
 
-    @Nonnull
-    public static Set<Constant> getNotSystemConstants(@Nonnull Generic expression) {
-        final Set<Constant> notSystemConstants = new HashSet<Constant>();
-
-        for (Constant constant : expression.getConstants()) {
-            IConstant var = Locator.getInstance().getEngine().getVariablesRegistry().get(constant.getName());
-            if (var != null && !var.isSystem() && !var.isDefined()) {
-                notSystemConstants.add(constant);
-            }
-        }
-
-        return notSystemConstants;
-    }
-
 }

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

@@ -57,8 +57,6 @@ public class Display {
     Lazy<Notifier> notifier;
     @Inject
     Lazy<PreferredPreferences> preferredPreferences;
-    @Inject
-    ActivityLauncher launcher;
     @Nullable
     private DisplayView view;
     @Nonnull

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

@@ -37,17 +37,12 @@ import butterknife.ButterKnife;
 import com.squareup.otto.Bus;
 import jscl.NumeralBase;
 import jscl.math.Generic;
-import jscl.math.function.Constant;
-import jscl.math.function.CustomFunction;
 import org.solovyev.android.calculator.converter.ConverterFragment;
 import org.solovyev.android.calculator.jscl.JsclOperation;
-import org.solovyev.android.calculator.plot.ExpressionFunction;
 import org.solovyev.android.plotter.Plotter;
 
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
-import java.util.ArrayList;
-import java.util.List;
 
 public class DisplayFragment extends BaseFragment implements View.OnClickListener,
         MenuItem.OnMenuItemClickListener {
@@ -146,8 +141,7 @@ public class DisplayFragment extends BaseFragment implements View.OnClickListene
                     addMenu(menu, R.string.c_convert, this);
                 }
             }
-            final int parameters = CalculatorUtils.getNotSystemConstants(result).size();
+            if (launcher.canPlot(result)) {
-            if (parameters >= 0 && parameters <= 2) {
                 addMenu(menu, R.string.c_plot, this);
             }
         }
@@ -216,21 +210,7 @@ public class DisplayFragment extends BaseFragment implements View.OnClickListene
                 ConverterFragment.show(getActivity(), getValue(result));
                 return true;
             case R.string.c_plot:
-                if (result != null) {
+                launcher.plot(result);
-                    try {
-                        final List<String> parameters = new ArrayList<>();
-                        for (Constant parameter : CalculatorUtils.getNotSystemConstants(result)) {
-                            parameters.add(parameter.getName());
-                        }
-                        new CustomFunction.Builder().setParameterNames(parameters).setContent(state.text).create();
-                        final CustomFunction f = new CustomFunction.Builder().setName("").setParameterNames(parameters).setContent(result.toString()).create();
-                        final ExpressionFunction ef = new ExpressionFunction(f, false);
-                        plotter.add(ef);
-                        launcher.showPlotter();
-                    } catch (RuntimeException e) {
-                        errorReporter.onException(e);
-                    }
-                }
                 return true;
             default:
                 return false;

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

@@ -22,8 +22,6 @@
 
 package org.solovyev.android.calculator;
 
-import org.solovyev.android.calculator.plot.CalculatorPlotter;
-
 import javax.annotation.Nonnull;
 
 public class Locator implements CalculatorLocator {
@@ -36,8 +34,6 @@ public class Locator implements CalculatorLocator {
     private Calculator calculator;
     @Nonnull
     private Keyboard keyboard;
-    @Nonnull
-    private CalculatorPlotter calculatorPlotter;
 
     public Locator() {
     }
@@ -50,13 +46,10 @@ public class Locator implements CalculatorLocator {
     @Override
     public void init(@Nonnull Calculator calculator,
                      @Nonnull Engine engine,
-                     @Nonnull Keyboard keyboard,
+                     @Nonnull Keyboard keyboard) {
-                     @Nonnull CalculatorPlotter plotter) {
 
         this.calculator = calculator;
         this.engine = engine;
-        this.calculatorPlotter = plotter;
-
         this.keyboard = keyboard;
     }
 
@@ -78,9 +71,4 @@ public class Locator implements CalculatorLocator {
         return keyboard;
     }
 
-    @Nonnull
-    @Override
-    public CalculatorPlotter getPlotter() {
-        return calculatorPlotter;
-    }
 }

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

@@ -24,17 +24,14 @@ package org.solovyev.android.calculator;
 
 import android.app.Application;
 import android.os.Handler;
+import android.support.annotation.StringRes;
 import android.widget.Toast;
 import org.solovyev.android.Threads;
-import org.solovyev.android.msg.AndroidMessage;
 import org.solovyev.common.msg.Message;
-import org.solovyev.common.msg.MessageType;
 
 import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.inject.Singleton;
-import java.util.List;
 
 @Singleton
 public class Notifier {
@@ -48,27 +45,27 @@ public class Notifier {
     }
 
     public void showMessage(@Nonnull Message message) {
-        showMessageInUiThread(message.getLocalizedMessage());
+        showMessage(message.getLocalizedMessage());
     }
 
-    public void showMessage(@Nonnull Integer messageCode, @Nonnull MessageType messageType, @Nonnull List<Object> parameters) {
+    public void showMessage(@StringRes int message, Object... parameters) {
-        showMessage(new AndroidMessage(messageCode, messageType, application, parameters));
+        showMessage(application.getString(message, parameters));
     }
 
-    public void showMessage(@Nonnull Integer messageCode, @Nonnull MessageType messageType, @Nullable Object... parameters) {
+    public void showMessage(@StringRes int message) {
-        showMessage(new AndroidMessage(messageCode, messageType, application, parameters));
+        showMessage(application.getString(message));
     }
 
-    private void showMessageInUiThread(@Nonnull final String message) {
+    public void showMessage(@Nonnull final String message) {
         if (Threads.isUiThread()) {
             Toast.makeText(application, message, Toast.LENGTH_SHORT).show();
-        } else {
+            return;
-            handler.post(new Runnable() {
-                @Override
-                public void run() {
-                    Toast.makeText(application, message, Toast.LENGTH_SHORT).show();
-                }
-            });
         }
+        handler.post(new Runnable() {
+            @Override
+            public void run() {
+                Toast.makeText(application, message, Toast.LENGTH_SHORT).show();
+            }
+        });
     }
 }

app/src/main/java/org/solovyev/android/calculator/keyboard/BaseKeyboardUi.java

@@ -1,13 +1,5 @@
 package org.solovyev.android.calculator.keyboard;
 
-import static android.view.HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING;
-import static android.view.HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING;
-import static android.view.HapticFeedbackConstants.KEYBOARD_TAP;
-import static org.solovyev.android.calculator.App.cast;
-import static org.solovyev.android.calculator.App.getScreenMetrics;
-import static org.solovyev.android.calculator.Preferences.Gui.Layout.simple;
-import static org.solovyev.android.calculator.Preferences.Gui.Layout.simple_mobile;
-
 import android.app.Activity;
 import android.app.Application;
 import android.content.Context;
@@ -20,15 +12,8 @@ import android.util.TypedValue;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
-
 import org.solovyev.android.Views;
-import org.solovyev.android.calculator.ActivityUi;
+import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.App;
-import org.solovyev.android.calculator.Calculator;
-import org.solovyev.android.calculator.Editor;
-import org.solovyev.android.calculator.Keyboard;
-import org.solovyev.android.calculator.Preferences;
-import org.solovyev.android.calculator.PreferredPreferences;
 import org.solovyev.android.calculator.buttons.CppSpecialButton;
 import org.solovyev.android.calculator.view.ScreenMetrics;
 import org.solovyev.android.views.Adjuster;
@@ -37,11 +22,16 @@ import org.solovyev.android.views.dragbutton.DragButton;
 import org.solovyev.android.views.dragbutton.DragDirection;
 import org.solovyev.android.views.dragbutton.SimpleDragListener;
 
+import javax.annotation.Nonnull;
+import javax.inject.Inject;
 import java.util.ArrayList;
 import java.util.List;
 
-import javax.annotation.Nonnull;
+import static android.view.HapticFeedbackConstants.*;
-import javax.inject.Inject;
+import static org.solovyev.android.calculator.App.cast;
+import static org.solovyev.android.calculator.App.getScreenMetrics;
+import static org.solovyev.android.calculator.Preferences.Gui.Layout.simple;
+import static org.solovyev.android.calculator.Preferences.Gui.Layout.simple_mobile;
 
 public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPreferenceChangeListener, SimpleDragListener.DragProcessor, View.OnClickListener {
 
@@ -67,6 +57,8 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
     @Inject
     Calculator calculator;
     @Inject
+    ActivityLauncher launcher;
+    @Inject
     PreferredPreferences preferredPreferences;
     protected int orientation = Configuration.ORIENTATION_PORTRAIT;
     private int textSize;

app/src/main/java/org/solovyev/android/calculator/keyboard/PartialKeyboardUi.java

@@ -17,7 +17,6 @@ import butterknife.Bind;
 import butterknife.ButterKnife;
 import jscl.NumeralBase;
 import org.solovyev.android.Check;
-import org.solovyev.android.calculator.ActivityLauncher;
 import org.solovyev.android.calculator.Engine;
 import org.solovyev.android.calculator.Preferences;
 import org.solovyev.android.calculator.R;
@@ -121,7 +120,7 @@ public class PartialKeyboardUi extends BaseKeyboardUi {
                 return true;
             case R.id.cpp_button_equals:
                 if (direction == down) {
-                    ActivityLauncher.tryPlot();
+                    launcher.plotDisplayedExpression();
                     return true;
                 } else if (direction == up) {
                     calculator.simplify();

app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java

@@ -1,442 +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.plot;
-
-import com.google.common.base.Predicate;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Lists;
-import jscl.math.Generic;
-import jscl.math.function.Constant;
-import org.solovyev.android.calculator.Calculator;
-import org.solovyev.android.calculator.CalculatorEventType;
-import org.solovyev.android.calculator.CalculatorUtils;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-
-public class CalculatorPlotterImpl implements CalculatorPlotter {
-
-    @Nonnull
-    private final List<PlotFunction> functions = new ArrayList<PlotFunction>();
-
-    @Nonnull
-    private final Calculator calculator;
-
-    private final PlotResourceManager resourceManager = new MapPlotResourceManager();
-
-    private boolean plot3d = false;
-    private boolean adjustYAxis = true;
-
-    private boolean plotImag = false;
-
-    private int arity = 0;
-
-    @Nonnull
-    private PlotBoundaries plotBoundaries = PlotBoundaries.newDefaultInstance();
-
-    @Nonnull
-    private PlotData plotData = new PlotData(Collections.<PlotFunction>emptyList(), plot3d, true, plotBoundaries);
-
-    public CalculatorPlotterImpl(@Nonnull Calculator calculator) {
-        this.calculator = calculator;
-    }
-
-    @Nonnull
-    @Override
-    public PlotData getPlotData() {
-        return plotData;
-    }
-
-    @Override
-    public boolean addFunction(@Nonnull Generic expression) {
-        final List<Constant> variables = new ArrayList<Constant>(CalculatorUtils.getNotSystemConstants(expression));
-
-        if (variables.size() > 2) throw new AssertionError();
-
-        final Constant xVariable;
-        if (variables.size() > 0) {
-            xVariable = variables.get(0);
-        } else {
-            xVariable = null;
-        }
-
-        final Constant yVariable;
-        if (variables.size() > 1) {
-            yVariable = variables.get(1);
-        } else {
-            yVariable = null;
-        }
-
-        final XyFunction realXyFunction = new XyFunction(expression, xVariable, yVariable, false);
-        final XyFunction imagXyFunction = new XyFunction(expression, xVariable, yVariable, true);
-
-        // first create plot functions with default line definitions
-        PlotFunction realPlotFunction = new PlotFunction(realXyFunction);
-        PlotFunction imagPlotFunction = new PlotFunction(imagXyFunction);
-
-        // then remove all unpinned graphs and free their line definitions
-        removeAllUnpinnedExcept(realPlotFunction, imagPlotFunction);
-
-        // create plot functions with freed line definitions
-        realPlotFunction = newPlotFunction(realXyFunction);
-        imagPlotFunction = newPlotFunction(imagXyFunction);
-
-        final boolean realAdded = addFunction(realPlotFunction);
-        final boolean imagAdded = addFunction(plotImag ? imagPlotFunction : PlotFunction.invisible(imagPlotFunction));
-
-        return imagAdded || realAdded;
-    }
-
-    @Nonnull
-    private PlotFunction newPlotFunction(@Nonnull XyFunction xyFunction) {
-        return new PlotFunction(xyFunction, resourceManager.generateAndRegister());
-    }
-
-    @Override
-    public boolean addFunction(@Nonnull PlotFunction plotFunction) {
-        synchronized (functions) {
-            if (!functions.contains(plotFunction)) {
-                resourceManager.register(plotFunction.getPlotLineDef());
-                functions.add(plotFunction);
-                onFunctionsChanged();
-                return true;
-            } else {
-                return false;
-            }
-        }
-    }
-
-    private boolean removeAllUnpinnedExcept(@Nonnull final PlotFunction... exceptFunctions) {
-        synchronized (functions) {
-
-            boolean changed = Iterables.removeIf(functions, new Predicate<PlotFunction>() {
-                @Override
-                public boolean apply(@Nullable PlotFunction function) {
-                    if (function != null && !function.isPinned()) {
-
-                        for (PlotFunction exceptFunction : exceptFunctions) {
-                            if (exceptFunction.equals(function)) {
-                                return false;
-                            }
-                        }
-
-                        resourceManager.unregister(function.getPlotLineDef());
-
-                        return true;
-                    } else {
-                        return false;
-                    }
-                }
-            });
-
-            if (changed) {
-                onFunctionsChanged();
-            }
-
-            return changed;
-        }
-    }
-
-
-    @Override
-    public void removeAllUnpinned() {
-        synchronized (functions) {
-            boolean changed = Iterables.removeIf(functions, new Predicate<PlotFunction>() {
-                @Override
-                public boolean apply(@Nullable PlotFunction function) {
-                    boolean removed = function != null && !function.isPinned();
-
-                    if (removed) {
-                        resourceManager.unregister(function.getPlotLineDef());
-                    }
-
-                    return removed;
-                }
-            });
-
-            if (changed) {
-                onFunctionsChanged();
-            }
-        }
-    }
-
-    @Override
-    public boolean removeFunction(@Nonnull PlotFunction plotFunction) {
-        synchronized (functions) {
-            boolean changed = functions.remove(plotFunction);
-            if (changed) {
-                resourceManager.unregister(plotFunction.getPlotLineDef());
-                onFunctionsChanged();
-            }
-            return changed;
-        }
-    }
-
-    @Override
-    public boolean addFunction(@Nonnull XyFunction xyFunction) {
-        return addFunction(newPlotFunction(xyFunction));
-    }
-
-    @Override
-    public boolean addFunction(@Nonnull XyFunction xyFunction, @Nonnull PlotLineDef functionLineDef) {
-        return addFunction(new PlotFunction(xyFunction, functionLineDef));
-    }
-
-    @Override
-    public boolean updateFunction(@Nonnull XyFunction xyFunction, @Nonnull PlotLineDef functionLineDef) {
-        final PlotFunction newFunction = new PlotFunction(xyFunction, functionLineDef);
-
-        return updateFunction(newFunction);
-    }
-
-    @Override
-    public boolean updateFunction(@Nonnull PlotFunction newFunction) {
-        boolean changed = updateFunction0(newFunction);
-        if (changed) {
-            firePlotDataChangedEvent();
-        }
-        return changed;
-    }
-
-    public boolean updateFunction0(@Nonnull PlotFunction newFunction) {
-        boolean changed = false;
-
-        synchronized (functions) {
-            for (int i = 0; i < functions.size(); i++) {
-                final PlotFunction oldFunction = functions.get(i);
-                if (oldFunction.equals(newFunction)) {
-
-                    resourceManager.unregister(oldFunction.getPlotLineDef());
-                    resourceManager.register(newFunction.getPlotLineDef());
-
-                    // update old function
-                    functions.set(i, newFunction);
-                    changed = true;
-                    break;
-                }
-            }
-        }
-
-        return changed;
-    }
-
-    @Override
-    public boolean removeFunction(@Nonnull XyFunction xyFunction) {
-        return removeFunction(new PlotFunction(xyFunction));
-    }
-
-    @Nonnull
-    @Override
-    public PlotFunction pin(@Nonnull PlotFunction plotFunction) {
-        final PlotFunction newFunction = PlotFunction.pin(plotFunction);
-        updateFunction0(newFunction);
-        return newFunction;
-    }
-
-    @Nonnull
-    @Override
-    public PlotFunction unpin(@Nonnull PlotFunction plotFunction) {
-        final PlotFunction newFunction = PlotFunction.unpin(plotFunction);
-        updateFunction0(newFunction);
-        return newFunction;
-    }
-
-    @Nonnull
-    @Override
-    public PlotFunction show(@Nonnull PlotFunction plotFunction) {
-        final PlotFunction newFunction = PlotFunction.visible(plotFunction);
-
-        updateFunction(newFunction);
-
-        return newFunction;
-    }
-
-    @Nonnull
-    @Override
-    public PlotFunction hide(@Nonnull PlotFunction plotFunction) {
-        final PlotFunction newFunction = PlotFunction.invisible(plotFunction);
-
-        updateFunction(newFunction);
-
-        return newFunction;
-    }
-
-    @Override
-    public void clearAllFunctions() {
-        synchronized (functions) {
-            resourceManager.unregisterAll();
-            functions.clear();
-            onFunctionsChanged();
-        }
-    }
-
-    @Nullable
-    @Override
-    public PlotFunction getFunctionById(@Nonnull final String functionId) {
-        synchronized (functions) {
-            return Iterables.find(functions, new Predicate<PlotFunction>() {
-                @Override
-                public boolean apply(@Nullable PlotFunction function) {
-                    return function != null && function.getXyFunction().getId().equals(functionId);
-                }
-            }, null);
-        }
-    }
-
-    // NOTE: this method must be called from synchronized block
-    private void onFunctionsChanged() {
-        if (!Thread.holdsLock(functions)) throw new AssertionError();
-
-        int maxArity = 0;
-        for (PlotFunction function : functions) {
-            final XyFunction xyFunction = function.getXyFunction();
-
-            maxArity = Math.max(maxArity, xyFunction.getArity());
-        }
-
-        plot3d = maxArity > 1;
-
-        if (functions.isEmpty()) {
-            // no functions => new plot => default boundaries
-            this.plotBoundaries = PlotBoundaries.newDefaultInstance();
-            this.adjustYAxis = true;
-        }
-
-        arity = maxArity;
-
-        firePlotDataChangedEvent();
-    }
-
-    @Nonnull
-    @Override
-    public List<PlotFunction> getFunctions() {
-        synchronized (functions) {
-            return new ArrayList<PlotFunction>(functions);
-        }
-    }
-
-    @Nonnull
-    @Override
-    public List<PlotFunction> getVisibleFunctions() {
-        synchronized (functions) {
-            return Lists.newArrayList(Iterables.filter(functions, new Predicate<PlotFunction>() {
-                @Override
-                public boolean apply(@Nullable PlotFunction function) {
-                    return function != null && function.isVisible();
-                }
-            }));
-        }
-    }
-
-    @Override
-    public void plot() {
-        calculator.fireCalculatorEvent(CalculatorEventType.plot_graph, null);
-    }
-
-    @Override
-    public void plot(@Nonnull Generic expression) {
-        addFunction(expression);
-        plot();
-    }
-
-    @Override
-    public boolean is2dPlotPossible() {
-        return arity < 2;
-    }
-
-    @Override
-    public boolean isPlotPossibleFor(@Nonnull Generic expression) {
-        boolean result = false;
-
-        int size = CalculatorUtils.getNotSystemConstants(expression).size();
-        if (size == 0 || size == 1 || size == 2) {
-            result = true;
-        }
-
-        return result;
-    }
-
-    @Override
-    public void setPlot3d(boolean plot3d) {
-        if (this.plot3d != plot3d) {
-            this.plot3d = plot3d;
-            firePlotDataChangedEvent();
-        }
-    }
-
-    private void firePlotDataChangedEvent() {
-        updatePlotData();
-        calculator.fireCalculatorEvent(CalculatorEventType.plot_data_changed, plotData);
-    }
-
-    private void updatePlotData() {
-        plotData = new PlotData(getVisibleFunctions(), plot3d, adjustYAxis, plotBoundaries);
-    }
-
-    @Override
-    public void setPlotImag(boolean plotImag) {
-        if (this.plotImag != plotImag) {
-            this.plotImag = plotImag;
-            if (toggleImagFunctions(this.plotImag)) {
-                firePlotDataChangedEvent();
-            }
-        }
-    }
-
-    @Override
-    public void savePlotBoundaries(@Nonnull PlotBoundaries plotBoundaries) {
-        if (!this.plotBoundaries.equals(plotBoundaries)) {
-            this.plotBoundaries = plotBoundaries;
-            this.adjustYAxis = false;
-            updatePlotData();
-        }
-    }
-
-    @Override
-    public void setPlotBoundaries(@Nonnull PlotBoundaries plotBoundaries) {
-        if (!this.plotBoundaries.equals(plotBoundaries)) {
-            this.plotBoundaries = plotBoundaries;
-            this.adjustYAxis = false;
-            firePlotDataChangedEvent();
-        }
-    }
-
-    private boolean toggleImagFunctions(boolean show) {
-        boolean changed = false;
-
-        synchronized (functions) {
-            for (int i = 0; i < functions.size(); i++) {
-                final PlotFunction plotFunction = functions.get(i);
-                if (plotFunction.getXyFunction().isImag()) {
-                    functions.set(i, show ? PlotFunction.visible(plotFunction) : PlotFunction.invisible(plotFunction));
-                    changed = true;
-                }
-            }
-        }
-
-        return changed;
-    }
-}

app/src/main/java/org/solovyev/android/calculator/plot/PlotFunctionListItem.java

@@ -1,152 +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.plot;
-
-import android.content.Context;
-import android.view.View;
-import android.widget.CheckBox;
-import android.widget.CompoundButton;
-import android.widget.ImageButton;
-import android.widget.TextView;
-
-import org.solovyev.android.calculator.Locator;
-import org.solovyev.android.calculator.R;
-import org.solovyev.android.list.ListItem;
-import org.solovyev.android.view.ViewBuilder;
-import org.solovyev.android.view.ViewFromLayoutBuilder;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-public class PlotFunctionListItem implements ListItem {
-
-    private static final String PREFIX = "plot_function_";
-
-    @Nonnull
-    private PlotFunction plotFunction;
-
-    @Nonnull
-    private ViewBuilder<View> viewBuilder;
-
-    @Nonnull
-    private String tag;
-
-    public PlotFunctionListItem(@Nonnull PlotFunction plotFunction) {
-        this.plotFunction = plotFunction;
-        this.viewBuilder = ViewFromLayoutBuilder.newInstance(R.layout.cpp_plot_function_list_item);
-        this.tag = PREFIX + plotFunction.getXyFunction().getExpressionString();
-    }
-
-    @Nullable
-    @Override
-    public OnClickAction getOnClickAction() {
-        return null;
-    }
-
-    @Nullable
-    @Override
-    public OnClickAction getOnLongClickAction() {
-        return null;
-    }
-
-    @Nonnull
-    @Override
-    public View updateView(@Nonnull Context context, @Nonnull View view) {
-        final Object viewTag = view.getTag();
-        if (viewTag instanceof String) {
-            if (this.tag.equals(viewTag)) {
-                return view;
-            } else if (((String) viewTag).startsWith(PREFIX)) {
-                fillView(view, context);
-                return view;
-            } else {
-                return build(context);
-            }
-        }
-
-        return build(context);
-    }
-
-    @Nonnull
-    @Override
-    public View build(@Nonnull Context context) {
-        final View root = buildView(context);
-        fillView(root, context);
-        return root;
-    }
-
-    private View buildView(@Nonnull Context context) {
-        return viewBuilder.build(context);
-    }
-
-    private void fillView(@Nonnull View root, @Nonnull final Context context) {
-        root.setTag(tag);
-
-        final CalculatorPlotter plotter = Locator.getInstance().getPlotter();
-
-        final TextView expressionTextView = (TextView) root.findViewById(R.id.cpp_plot_function_expression_textview);
-        expressionTextView.setText(plotFunction.getXyFunction().getExpressionString());
-
-        final CheckBox pinnedCheckBox = (CheckBox) root.findViewById(R.id.cpp_plot_function_pinned_checkbox);
-        pinnedCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
-            @Override
-            public void onCheckedChanged(CompoundButton buttonView, boolean pin) {
-                if (pin) {
-                    if (!plotFunction.isPinned()) {
-                        plotFunction = plotter.pin(plotFunction);
-                    }
-                } else {
-                    if (plotFunction.isPinned()) {
-                        plotFunction = plotter.unpin(plotFunction);
-                    }
-                }
-            }
-        });
-        pinnedCheckBox.setChecked(plotFunction.isPinned());
-
-        final CheckBox visibleCheckBox = (CheckBox) root.findViewById(R.id.cpp_plot_function_visible_checkbox);
-        visibleCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
-            @Override
-            public void onCheckedChanged(CompoundButton buttonView, boolean show) {
-                if (show) {
-                    if (!plotFunction.isVisible()) {
-                        plotFunction = plotter.show(plotFunction);
-                    }
-                } else {
-                    if (plotFunction.isVisible()) {
-                        plotFunction = plotter.hide(plotFunction);
-                    }
-                }
-            }
-        });
-        visibleCheckBox.setChecked(plotFunction.isVisible());
-
-        final ImageButton settingsButton = (ImageButton) root.findViewById(R.id.cpp_plot_function_settings_button);
-        settingsButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                // FIXME: 2016-02-01 
-            }
-        });
-    }
-}

app/src/test/java/org/solovyev/android/calculator/AbstractCalculatorTest.java

@@ -24,7 +24,6 @@ package org.solovyev.android.calculator;
 
 import android.content.SharedPreferences;
 import com.squareup.otto.Bus;
-import org.solovyev.android.calculator.plot.CalculatorPlotter;
 
 import java.util.concurrent.Executor;
 
@@ -38,7 +37,7 @@ import static org.mockito.Mockito.mock;
 public class AbstractCalculatorTest {
 
     protected void setUp() throws Exception {
-        Locator.getInstance().init(new Calculator(mock(SharedPreferences.class), mock(Bus.class), mock(Executor.class), mock(Executor.class)), CalculatorTestUtils.newCalculatorEngine(), mock(Keyboard.class), mock(CalculatorPlotter.class));
+        Locator.getInstance().init(new Calculator(mock(SharedPreferences.class), mock(Bus.class), mock(Executor.class), mock(Executor.class)), CalculatorTestUtils.newCalculatorEngine(), mock(Keyboard.class));
         Locator.getInstance().getEngine().init(new Executor() {
             @Override
             public void execute(Runnable command) {

app/src/test/java/org/solovyev/android/calculator/CalculatorTestUtils.java

@@ -36,7 +36,6 @@ import org.solovyev.android.calculator.jscl.JsclOperation;
 import org.solovyev.android.calculator.language.Languages;
 import org.solovyev.android.calculator.operators.OperatorsRegistry;
 import org.solovyev.android.calculator.operators.PostfixFunctionsRegistry;
-import org.solovyev.android.calculator.plot.CalculatorPlotter;
 
 import jscl.JsclMathEngine;
 
@@ -68,7 +67,7 @@ public class CalculatorTestUtils {
 
     public static void staticSetUp() throws Exception {
         App.init(new CalculatorApplication(), new Languages(new RoboSharedPreferences(new HashMap<String, Map<String, Object>>(), "test", 0)));
-        Locator.getInstance().init(new Calculator(mock(SharedPreferences.class), mock(Bus.class), mock(Executor.class), mock(Executor.class)), newCalculatorEngine(), mock(Keyboard.class), mock(CalculatorPlotter.class));
+        Locator.getInstance().init(new Calculator(mock(SharedPreferences.class), mock(Bus.class), mock(Executor.class), mock(Executor.class)), newCalculatorEngine(), mock(Keyboard.class));
         Locator.getInstance().getEngine().init(new Executor() {
             @Override
             public void execute(Runnable command) {
@@ -83,7 +82,7 @@ public class CalculatorTestUtils {
     }
 
     public static void staticSetUp(@Nullable Context context) throws Exception {
-        Locator.getInstance().init(new Calculator(mock(SharedPreferences.class), mock(Bus.class), mock(Executor.class), mock(Executor.class)), newCalculatorEngine(), mock(Keyboard.class), mock(CalculatorPlotter.class));
+        Locator.getInstance().init(new Calculator(mock(SharedPreferences.class), mock(Bus.class), mock(Executor.class), mock(Executor.class)), newCalculatorEngine(), mock(Keyboard.class));
         Locator.getInstance().getEngine().init(new Executor() {
             @Override
             public void execute(Runnable command) {

jscl/src/main/java/jscl/math/Generic.java

@@ -1,17 +1,40 @@
 package jscl.math;
 
 import jscl.math.function.Constant;
+import jscl.math.function.IConstant;
 import jscl.mathml.MathML;
 import jscl.text.ParserUtils;
-
+import org.solovyev.common.math.MathRegistry;
-import java.math.BigInteger;
-import java.util.Set;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
+import java.math.BigInteger;
+import java.util.HashSet;
+import java.util.Set;
 
 public abstract class Generic implements Arithmetic<Generic>, Comparable {
 
+    @Nonnull
+    public Set<Constant> getUndefinedConstants(@Nonnull MathRegistry<IConstant> constantsRegistry) {
+        final Set<Constant> result = new HashSet<>();
+
+        for (Constant expressionConstant : getConstants()) {
+            final IConstant registryConstant = constantsRegistry.get(expressionConstant.getName());
+            if (registryConstant == null) {
+                continue;
+            }
+            if (registryConstant.isSystem()) {
+                continue;
+            }
+            if(registryConstant.isDefined()) {
+                continue;
+            }
+            result.add(expressionConstant);
+        }
+
+        return result;
+    }
+
     public BigInteger toBigInteger() {
         return null;
     }

jscl/src/main/java/jscl/math/function/CustomFunction.java

@@ -43,7 +43,7 @@ public class CustomFunction extends Function implements IFunction {
     private CustomFunction(@Nonnull String name,
                            @Nonnull List<String> parameterNames,
                            @Nonnull String content,
-                           @Nullable String description) {
+                           @Nullable String description) throws CustomFunctionCalculationException {
         super(name, new Generic[parameterNames.size()]);
         this.parameterNames = parameterNames;
         try {
@@ -321,7 +321,7 @@ public class CustomFunction extends Function implements IFunction {
         }
 
         @Nonnull
-        public CustomFunction create() {
+        public CustomFunction create() throws CustomFunctionCalculationException {
             final CustomFunction customFunction = new CustomFunction(name, parameterNames, prepareContent(content), description);
             customFunction.setSystem(system);
             if (id != null) {