/*
* 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.variables;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.TextInputLayout;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AlertDialog;
import android.text.Editable;
import android.text.InputFilter;
import android.text.SpannableStringBuilder;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;
import org.solovyev.android.Check;
import org.solovyev.android.calculator.App;
import org.solovyev.android.calculator.AppComponent;
import org.solovyev.android.calculator.BaseDialogFragment;
import org.solovyev.android.calculator.Calculator;
import org.solovyev.android.calculator.Engine;
import org.solovyev.android.calculator.Keyboard;
import org.solovyev.android.calculator.PreparedExpression;
import org.solovyev.android.calculator.R;
import org.solovyev.android.calculator.RemovalConfirmationDialog;
import org.solovyev.android.calculator.ToJsclTextProcessor;
import org.solovyev.android.calculator.VariablesRegistry;
import org.solovyev.android.calculator.functions.FunctionsRegistry;
import org.solovyev.android.calculator.keyboard.FloatingKeyboard;
import org.solovyev.android.calculator.keyboard.FloatingKeyboardWindow;
import org.solovyev.android.calculator.math.MathType;
import org.solovyev.android.calculator.view.EditTextCompat;
import org.solovyev.android.text.method.NumberInputFilter;
import org.solovyev.common.text.Strings;
import java.util.Arrays;
import java.util.List;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.inject.Inject;
import butterknife.Bind;
import butterknife.ButterKnife;
import dagger.Lazy;
import jscl.math.function.IConstant;
import static org.solovyev.android.calculator.variables.CppVariable.NO_ID;
public class EditVariableFragment extends BaseDialogFragment implements View.OnFocusChangeListener, View.OnKeyListener, View.OnClickListener {
private static final String ARG_VARIABLE = "variable";
private final static List<Character> ACCEPTABLE_CHARACTERS = Arrays.asList(Strings.toObjects(("1234567890abcdefghijklmnopqrstuvwxyzйцукенгшщзхъфывапролджэячсмитьбюё_" + GreekFloatingKeyboard.ALPHABET).toCharArray()));
@NonNull
private final KeyboardUser keyboardUser = new KeyboardUser();
@Bind(R.id.variable_name_label)
TextInputLayout nameLabel;
@Bind(R.id.variable_name)
EditTextCompat nameView;
@NonNull
private final FloatingKeyboardWindow keyboardWindow = new FloatingKeyboardWindow(new PopupWindow.OnDismissListener() {
@Override
public void onDismiss() {
nameView.setShowSoftInputOnFocusCompat(true);
}
});
@Bind(R.id.variable_keyboard_button)
Button keyboardButton;
@Bind(R.id.variable_value_label)
TextInputLayout valueLabel;
@Bind(R.id.variable_value)
EditText valueView;
@Bind(R.id.variable_exponent_button)
Button exponentButton;
@Bind(R.id.variable_description)
EditText descriptionView;
@Inject
Calculator calculator;
@Inject
Keyboard keyboard;
@Inject
Typeface typeface;
@Inject
FunctionsRegistry functionsRegistry;
@Inject
VariablesRegistry variablesRegistry;
@Inject
Lazy<ToJsclTextProcessor> toJsclTextProcessor;
@Inject
Engine engine;
@Nullable
private CppVariable variable;
public EditVariableFragment() {
}
@Nonnull
public static EditVariableFragment create(@Nullable CppVariable variable) {
final EditVariableFragment fragment = new EditVariableFragment();
if (variable != null) {
final Bundle args = new Bundle();
args.putParcelable(ARG_VARIABLE, variable);
fragment.setArguments(args);
}
return fragment;
}
public static void showDialog(@Nonnull FragmentActivity activity) {
EditVariableFragment.showDialog(null, activity.getSupportFragmentManager());
}
public static void showDialog(@Nullable CppVariable variable, @Nonnull Context context) {
if (!(context instanceof VariablesActivity)) {
final Intent intent = new Intent(context, VariablesActivity.getClass(context));
App.addIntentFlags(intent, false, context);
intent.putExtra(VariablesActivity.EXTRA_VARIABLE, variable);
context.startActivity(intent);
} else {
EditVariableFragment.showDialog(variable,
((VariablesActivity) context).getSupportFragmentManager());
}
}
public static void showDialog(@Nullable CppVariable variable, @Nonnull FragmentManager fm) {
App.showDialog(create(variable), "variable-editor", fm);
}
public boolean isValidValue(@Nonnull String value) {
try {
final PreparedExpression pe = toJsclTextProcessor.get().process(value);
return !pe.hasUndefinedVariables();
} catch (RuntimeException e) {
return false;
}
}
@Override
public void onCreate(@android.support.annotation.Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Bundle arguments = getArguments();
if (arguments != null) {
variable = arguments.getParcelable(ARG_VARIABLE);
}
}
@Override
protected void inject(@NonNull AppComponent component) {
super.inject(component);
component.inject(this);
}
@Override
protected void onPrepareDialog(@NonNull AlertDialog.Builder builder) {
builder.setNegativeButton(R.string.cpp_cancel, null);
builder.setPositiveButton(R.string.cpp_done, null);
builder.setTitle(isNewVariable() ? R.string.c_var_create_var : R.string.c_var_edit_var);
if (!isNewVariable()) {
builder.setNeutralButton(R.string.cpp_delete, null);
}
}
private boolean isNewVariable() {
return variable == null || variable.id == NO_ID;
}
@NonNull
@Override
public AlertDialog onCreateDialog(Bundle savedInstanceState) {
final AlertDialog dialog = super.onCreateDialog(savedInstanceState);
dialog.setCanceledOnTouchOutside(false);
return dialog;
}
@Override
protected void onShowDialog(@NonNull AlertDialog dialog, boolean firstTime) {
if (firstTime) {
nameView.selectAll();
showIme(nameView);
}
}
private void showRemovalDialog(@NonNull final CppVariable variable) {
RemovalConfirmationDialog.showForVariable(getActivity(), variable.name,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Check.isTrue(which == DialogInterface.BUTTON_POSITIVE);
variablesRegistry.remove(variable.toJsclConstant());
dismiss();
}
});
}
private void tryClose() {
if (validate() && applyData()) {
dismiss();
}
}
private boolean applyData() {
try {
final CppVariable newVariable = CppVariable.builder(nameView.getText().toString())
.withId(isNewVariable() ? NO_ID : variable.id)
.withValue(valueView.getText().toString())
.withDescription(descriptionView.getText().toString()).build();
final IConstant oldVariable = isNewVariable() ? null : variablesRegistry.getById(variable.id);
variablesRegistry.addOrUpdate(newVariable.toJsclConstant(), oldVariable);
return true;
} catch (RuntimeException e) {
setError(valueLabel, e.getLocalizedMessage());
}
return false;
}
private boolean validate() {
return validateName() & validateValue();
}
private boolean validateValue() {
final String value = valueView.getText().toString();
if (!Strings.isEmpty(value)) {
// value is not empty => must be a number
if (!isValidValue(value)) {
setError(valueLabel, R.string.c_value_is_not_a_number);
return false;
}
}
clearError(valueLabel);
return true;
}
private boolean validateName() {
final String name = nameView.getText().toString();
if (!Engine.isValidName(name)) {
setError(nameLabel, getString(R.string.cpp_name_contains_invalid_characters));
return false;
}
for (int i = 0; i < name.length(); i++) {
final char c = name.charAt(i);
if (!ACCEPTABLE_CHARACTERS.contains(Character.toLowerCase(c))) {
setError(nameLabel, getString(R.string.c_char_is_not_accepted, c));
return false;
}
}
final IConstant existingVariable = variablesRegistry.get(name);
if (existingVariable != null) {
if (!existingVariable.isIdDefined()) {
Check.shouldNotHappen();
setError(nameLabel, getString(R.string.c_var_already_exists));
return false;
}
if (isNewVariable()) {
// trying to create a new variable with existing name
setError(nameLabel, getString(R.string.c_var_already_exists));
return false;
}
Check.isNotNull(variable);
if (!existingVariable.getId().equals(variable.id)) {
// trying to change the name of existing variable to some other variable's name
setError(nameLabel, getString(R.string.c_var_already_exists));
return false;
}
}
final MathType.Result type = MathType.getType(name, 0, false, engine);
if (type.type != MathType.text && type.type != MathType.constant) {
setError(nameLabel, getString(R.string.c_var_name_clashes));
return false;
}
clearError(nameLabel);
return true;
}
@SuppressLint("InflateParams")
@NonNull
@Override
protected View onCreateDialogView(@NonNull Context context, @NonNull LayoutInflater inflater, @android.support.annotation.Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_variable_edit, null);
ButterKnife.bind(this, view);
if (savedInstanceState == null && variable != null) {
nameView.setText(variable.name);
valueView.setText(variable.value);
descriptionView.setText(variable.description);
}
nameView.setOnFocusChangeListener(this);
nameView.setOnKeyListener(this);
valueView.setOnFocusChangeListener(this);
valueView.setEditableFactory(new Editable.Factory() {
@Override
public Editable newEditable(CharSequence source) {
return new NumberEditable(source);
}
});
exponentButton.setOnClickListener(this);
descriptionView.setOnFocusChangeListener(this);
keyboardButton.setOnClickListener(this);
return view;
}
@Override
public void onFocusChange(View v, boolean hasFocus) {
switch (v.getId()) {
case R.id.variable_name:
if (hasFocus) {
clearError(nameLabel);
} else {
keyboardUser.done();
}
break;
case R.id.variable_value:
if (hasFocus) {
clearError(valueLabel);
} else {
validateValue();
}
break;
}
}
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (v.getId() == R.id.variable_name) {
if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK && keyboardWindow.isShown()) {
keyboardUser.done();
return true;
}
}
return false;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.variable_keyboard_button:
if (keyboardWindow.isShown()) {
keyboardUser.showIme();
} else {
showKeyboard();
}
break;
case R.id.variable_exponent_button:
final int start = Math.max(valueView.getSelectionStart(), 0);
final int end = Math.max(valueView.getSelectionEnd(), 0);
valueView.getText().replace(Math.min(start, end), Math.max(start, end), "E", 0, 1);
break;
default:
super.onClick(v);
break;
}
}
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
tryClose();
break;
case DialogInterface.BUTTON_NEUTRAL:
Check.isNotNull(variable);
showRemovalDialog(variable);
break;
default:
super.onClick(dialog, which);
break;
}
}
private void showKeyboard() {
nameView.dontShowSoftInputOnFocusCompat();
keyboardWindow.show(new GreekFloatingKeyboard(keyboardUser), getDialog());
}
private static class NumberEditable extends SpannableStringBuilder {
public NumberEditable(CharSequence source) {
super(source);
super.setFilters(new InputFilter[]{NumberInputFilter.getInstance()});
}
@Override
public void setFilters(InputFilter[] filters) {
// we don't want filters as we want to support numbers in scientific notation
}
}
private class KeyboardUser implements FloatingKeyboard.User {
@NonNull
@Override
public Context getContext() {
return getActivity();
}
@NonNull
@Override
public EditText getEditor() {
return nameView;
}
@NonNull
@Override
public ViewGroup getKeyboard() {
return keyboardWindow.getContentView();
}
@Override
public void done() {
if (keyboardWindow.isShown()) {
keyboardWindow.hide();
}
validateName();
}
@Override
public void showIme() {
final InputMethodManager keyboard = (InputMethodManager)
getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
keyboard.showSoftInput(getEditor(), InputMethodManager.SHOW_FORCED);
keyboardWindow.hide();
}
@Override
public boolean isVibrateOnKeypress() {
return keyboard.isVibrateOnKeypress();
}
@NonNull
@Override
public Typeface getTypeface() {
return typeface;
}
}
}