/*
* Copyright (C) 2010 The Android Open Source Project
* Copyright (C) 2015 Fastboot Mobile, LLC
*
* 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.
*/
package com.fastbootmobile.encore.app.ui;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.DialogPreference;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import com.fastbootmobile.encore.app.R;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* Created by Guigui on 28/06/2015.
*/
public class FilteredMultiSelectListPreference extends DialogPreference {
private CharSequence[] mEntries;
private CharSequence[] mEntryValues;
private Set<String> mValues = new HashSet<String>();
private Set<String> mNewValues = new HashSet<String>();
private boolean mPreferenceChanged;
private String mFilterText = null;
public FilteredMultiSelectListPreference(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
final TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.FilteredMultiSelectListPreference);
mEntries = a.getTextArray(R.styleable.FilteredMultiSelectListPreference_android_entries);
mEntryValues = a.getTextArray(R.styleable.FilteredMultiSelectListPreference_android_entryValues);
a.recycle();
setPositiveButtonText(android.R.string.yes);
setNegativeButtonText(android.R.string.no);
}
public FilteredMultiSelectListPreference(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FilteredMultiSelectListPreference(Context context) {
this(context, null);
}
@Override
protected View onCreateView(ViewGroup parent) {
View view = super.onCreateView(parent);
TextView title = (TextView) view.findViewById(android.R.id.title);
title.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16);
return view;
}
/**
* Sets the human-readable entries to be shown in the list. This will be
* shown in subsequent dialogs.
* <p>
* Each entry must have a corresponding index in
* {@link #setEntryValues(CharSequence[])}.
*
* @param entries The entries.
* @see #setEntryValues(CharSequence[])
*/
public void setEntries(CharSequence[] entries) {
mEntries = entries;
}
/**
* @see #setEntries(CharSequence[])
* @param entriesResId The entries array as a resource.
*/
public void setEntries(int entriesResId) {
setEntries(getContext().getResources().getTextArray(entriesResId));
}
/**
* The list of entries to be shown in the list in subsequent dialogs.
*
* @return The list as an array.
*/
public CharSequence[] getEntries() {
return mEntries;
}
/**
* The array to find the value to save for a preference when an entry from
* entries is selected. If a user clicks on the second item in entries, the
* second item in this array will be saved to the preference.
*
* @param entryValues The array to be used as values to save for the preference.
*/
public void setEntryValues(CharSequence[] entryValues) {
mEntryValues = entryValues;
}
/**
* @see #setEntryValues(CharSequence[])
* @param entryValuesResId The entry values array as a resource.
*/
public void setEntryValues(int entryValuesResId) {
setEntryValues(getContext().getResources().getTextArray(entryValuesResId));
}
/**
* Returns the array of values to be saved for the preference.
*
* @return The array of values.
*/
public CharSequence[] getEntryValues() {
return mEntryValues;
}
/**
* Sets the value of the key. This should contain entries in
* {@link #getEntryValues()}.
*
* @param values The values to set for the key.
*/
public void setValues(Set<String> values) {
mValues.clear();
mValues.addAll(values);
persistStringSet(values);
}
/**
* Retrieves the current value of the key.
*/
public Set<String> getValues() {
return mValues;
}
/**
* Returns the index of the given value (in the entry values array).
*
* @param value The value whose index should be returned.
* @return The index of the value, or -1 if not found.
*/
public int findIndexOfValue(String value) {
if (value != null && mEntryValues != null) {
for (int i = mEntryValues.length - 1; i >= 0; i--) {
if (mEntryValues[i].equals(value)) {
return i;
}
}
}
return -1;
}
@Override
protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
super.onPrepareDialogBuilder(builder);
if (mEntries == null || mEntryValues == null) {
throw new IllegalStateException(
"MultiSelectListPreference requires an entries array and " +
"an entryValues array.");
}
LayoutInflater inflater = LayoutInflater.from(getContext());
View root = inflater.inflate(R.layout.preference_filtered_multiselectlist, null, false);
builder.setView(root);
EditText filter = (EditText) root.findViewById(R.id.filter);
filter.setText(mFilterText);
filter.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
mFilterText = v.getText().toString();
Dialog dialog = getDialog();
if (dialog != null) {
getDialog().dismiss();
}
showDialog(null);
return true;
}
});
final ArrayList<CharSequence> filteredEntries = new ArrayList<>();
final ArrayList<Boolean> checkedFilteredItems = new ArrayList<>();
final ArrayList<CharSequence> filteredValues = new ArrayList<>();
boolean[] checkedItems = getSelectedItems();
int i = 0;
if (mFilterText != null) {
final String ucText = mFilterText.toUpperCase();
for (CharSequence entry : mEntries) {
if (entry.toString().toUpperCase().contains(ucText)) {
filteredEntries.add(mEntries[i]);
filteredValues.add(mEntryValues[i]);
checkedFilteredItems.add(checkedItems[i]);
}
++i;
}
} else {
filteredEntries.addAll(Arrays.asList(mEntries));
filteredValues.addAll(Arrays.asList(mEntryValues));
for (boolean item : checkedItems) {
checkedFilteredItems.add(item);
}
}
boolean[] finalCheckedItems = new boolean[checkedFilteredItems.size()];
i = 0;
for (Boolean item : checkedFilteredItems) {
finalCheckedItems[i] = item;
++i;
}
final CharSequence[] filteredEntriesArray = new CharSequence[filteredEntries.size()];
filteredEntries.toArray(filteredEntriesArray);
builder.setMultiChoiceItems(filteredEntriesArray, finalCheckedItems,
new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
if (isChecked) {
mPreferenceChanged |= mNewValues.add(filteredValues.get(which).toString());
} else {
mPreferenceChanged |= mNewValues.remove(filteredValues.get(which).toString());
}
}
});
mNewValues.clear();
mNewValues.addAll(mValues);
}
private boolean[] getSelectedItems() {
final CharSequence[] entries = mEntryValues;
final int entryCount = entries.length;
final Set<String> values = mValues;
boolean[] result = new boolean[entryCount];
for (int i = 0; i < entryCount; i++) {
result[i] = values.contains(entries[i].toString());
}
return result;
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (positiveResult && mPreferenceChanged) {
final Set<String> values = mNewValues;
if (callChangeListener(values)) {
setValues(values);
}
}
mPreferenceChanged = false;
}
@Override
protected Object onGetDefaultValue(TypedArray a, int index) {
final CharSequence[] defaultValues = a.getTextArray(index);
final int valueCount = defaultValues.length;
final Set<String> result = new HashSet<String>();
for (int i = 0; i < valueCount; i++) {
result.add(defaultValues[i].toString());
}
return result;
}
@Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
setValues(restoreValue ? getPersistedStringSet(mValues) : (Set<String>) defaultValue);
}
@Override
protected Parcelable onSaveInstanceState() {
final Parcelable superState = super.onSaveInstanceState();
if (isPersistent()) {
// No need to save instance state
return superState;
}
final SavedState myState = new SavedState(superState);
myState.values = getValues();
return myState;
}
private static class SavedState extends BaseSavedState {
Set<String> values;
public SavedState(Parcel source) {
super(source);
values = new HashSet<String>();
String[] strings = source.createStringArray();
final int stringCount = strings.length;
for (int i = 0; i < stringCount; i++) {
values.add(strings[i]);
}
}
public SavedState(Parcelable superState) {
super(superState);
}
@Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
dest.writeStringArray(values.toArray(new String[0]));
}
public static final Parcelable.Creator<SavedState> CREATOR =
new Parcelable.Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
/**
* Attempts to persist a set of Strings to the {@link android.content.SharedPreferences}.
* <p>
* This will check if this Preference is persistent, get an editor,
* put in the strings, and check if we should commit (and
* commit if so).
*
* @param values The values to persist.
* @return True if the Preference is persistent. (This is not whether the
* value was persisted, since we may not necessarily commit if there
* will be a batch commit later.)
*
* @hide Pending API approval
*/
public boolean persistStringSet(Set<String> values) {
if (shouldPersist()) {
// Shouldn't store null
if (values.equals(getPersistedStringSet(null))) {
// It's already there, so the same as persisting
return true;
}
SharedPreferences.Editor editor = getPreferenceManager().getSharedPreferences().edit();
editor.putStringSet(getKey(), values);
editor.apply();
return true;
}
return false;
}
/**
* Attempts to get a persisted set of Strings from the
* {@link android.content.SharedPreferences}.
* <p>
* This will check if this Preference is persistent, get the SharedPreferences,
* and get the value.
*
* @param defaultReturnValue The default value to return if either the
* Preference is not persistent or the Preference is not in the
* shared preferences.
* @return The value from the SharedPreferences or the default return
* value.
* @see #persistStringSet(Set)
*
* @hide Pending API approval
*/
public Set<String> getPersistedStringSet(Set<String> defaultReturnValue) {
if (!shouldPersist()) {
return defaultReturnValue;
}
return getPreferenceManager().getSharedPreferences()
.getStringSet(getKey(), defaultReturnValue);
}
}