session-android/src/org/thoughtcrime/securesms/components/CustomDefaultPreference.java

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package org.thoughtcrime.securesms.components;
import android.app.AlertDialog;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.preference.DialogPreference;
import android.support.annotation.NonNull;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.util.TextSecurePreferences;
import java.net.URI;
import java.net.URISyntaxException;
public class CustomDefaultPreference extends DialogPreference {
private static final String TAG = CustomDefaultPreference.class.getSimpleName();
private final int inputType;
private final String customPreference;
private final String customToggle;
private CustomPreferenceValidator validator;
private String defaultValue;
private Spinner spinner;
private EditText customText;
private TextView defaultLabel;
private Button positiveButton;
public CustomDefaultPreference(Context context, AttributeSet attrs) {
super(context, attrs);
int[] attributeNames = new int[]{android.R.attr.inputType, R.attr.custom_pref_toggle};
TypedArray attributes = context.obtainStyledAttributes(attrs, attributeNames);
this.inputType = attributes.getInt(0, 0);
this.customPreference = getKey();
this.customToggle = attributes.getString(1);
this.validator = new NullValidator();
attributes.recycle();
setPersistent(false);
setDialogLayoutResource(R.layout.custom_default_preference_dialog);
}
public CustomDefaultPreference setValidator(CustomPreferenceValidator validator) {
this.validator = validator;
return this;
}
public CustomDefaultPreference setDefaultValue(String defaultValue) {
this.defaultValue = defaultValue;
this.setSummary(getSummary());
return this;
}
@Override
public String getSummary() {
if (isCustom()) {
return getContext().getString(R.string.CustomDefaultPreference_using_custom,
getPrettyPrintValue(getCustomValue()));
} else {
return getContext().getString(R.string.CustomDefaultPreference_using_default,
getPrettyPrintValue(getDefaultValue()));
}
}
@Override
protected void onBindDialogView(@NonNull View view) {
super.onBindDialogView(view);
this.spinner = (Spinner) view.findViewById(R.id.default_or_custom);
this.defaultLabel = (TextView) view.findViewById(R.id.default_label);
this.customText = (EditText) view.findViewById(R.id.custom_edit);
this.customText.setInputType(inputType);
this.customText.addTextChangedListener(new TextValidator());
this.customText.setText(getCustomValue());
this.spinner.setOnItemSelectedListener(new SelectionLister());
this.defaultLabel.setText(getPrettyPrintValue(defaultValue));
}
@Override
protected void showDialog(Bundle instanceState) {
super.showDialog(instanceState);
positiveButton = ((AlertDialog)getDialog()).getButton(AlertDialog.BUTTON_POSITIVE);
if (isCustom()) spinner.setSelection(1, true);
else spinner.setSelection(0, true);
}
@Override
protected void onDialogClosed(boolean positiveResult) {
if (positiveResult) {
if (spinner != null) setCustom(spinner.getSelectedItemPosition() == 1);
if (customText != null) setCustomValue(customText.getText().toString());
setSummary(getSummary());
}
}
private String getPrettyPrintValue(String value) {
if (TextUtils.isEmpty(value)) return getContext().getString(R.string.CustomDefaultPreference_none);
else return value;
}
private boolean isCustom() {
return TextSecurePreferences.getBooleanPreference(getContext(), customToggle, false);
}
private void setCustom(boolean custom) {
TextSecurePreferences.setBooleanPreference(getContext(), customToggle, custom);
}
private String getCustomValue() {
return TextSecurePreferences.getStringPreference(getContext(), customPreference, "");
}
private void setCustomValue(String value) {
TextSecurePreferences.setStringPreference(getContext(), customPreference, value);
}
private String getDefaultValue() {
return defaultValue;
}
private class SelectionLister implements AdapterView.OnItemSelectedListener {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
defaultLabel.setVisibility(position == 0 ? View.VISIBLE : View.GONE);
customText.setVisibility(position == 0 ? View.GONE : View.VISIBLE);
positiveButton.setEnabled(position == 0 || validator.isValid(customText.getText().toString()));
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
defaultLabel.setVisibility(View.VISIBLE);
customText.setVisibility(View.GONE);
}
}
private class TextValidator implements TextWatcher {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {}
@Override
public void afterTextChanged(Editable s) {
if (spinner.getSelectedItemPosition() == 1) {
positiveButton.setEnabled(validator.isValid(s.toString()));
}
}
}
protected interface CustomPreferenceValidator {
public boolean isValid(String value);
}
private static class NullValidator implements CustomPreferenceValidator {
@Override
public boolean isValid(String value) {
return true;
}
}
public static class UriValidator implements CustomPreferenceValidator {
@Override
public boolean isValid(String value) {
if (TextUtils.isEmpty(value)) return true;
try {
new URI(value);
return true;
} catch (URISyntaxException mue) {
return false;
}
}
}
public static class HostnameValidator implements CustomPreferenceValidator {
@Override
public boolean isValid(String value) {
if (TextUtils.isEmpty(value)) return true;
try {
URI uri = new URI(null, value, null, null);
return true;
} catch (URISyntaxException mue) {
return false;
}
}
}
public static class PortValidator implements CustomPreferenceValidator {
@Override
public boolean isValid(String value) {
try {
Integer.parseInt(value);
return true;
} catch (NumberFormatException e) {
return false;
}
}
}
}