/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.android.timezonepicker;
import android.content.Context;
import android.content.SharedPreferences;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.android.timezonepicker.TimeZoneFilterTypeAdapter.OnSetFilterListener;
import com.android.timezonepicker.TimeZonePickerView.OnTimeZoneSetListener;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashSet;
public class TimeZoneResultAdapter extends BaseAdapter implements OnItemClickListener,
OnSetFilterListener {
private static final String TAG = "TimeZoneResultAdapter";
private static final boolean DEBUG = false;
private static final int VIEW_TAG_TIME_ZONE = R.id.time_zone;
private static final int EMPTY_INDEX = -100;
/** SharedPref name and key for recent time zones */
private static final String SHARED_PREFS_NAME = "com.android.calendar_preferences";
private static final String KEY_RECENT_TIMEZONES = "preferences_recent_timezones";
private int mLastFilterType;
private String mLastFilterString;
private int mLastFilterTime;
private boolean mHasResults = false;
/**
* The delimiter we use when serializing recent timezones to shared
* preferences
*/
private static final String RECENT_TIMEZONES_DELIMITER = ",";
/** The maximum number of recent timezones to save */
private static final int MAX_RECENT_TIMEZONES = 3;
static class ViewHolder {
TextView timeZone;
TextView timeOffset;
TextView location;
static void setupViewHolder(View v) {
ViewHolder vh = new ViewHolder();
vh.timeZone = (TextView) v.findViewById(R.id.time_zone);
vh.timeOffset = (TextView) v.findViewById(R.id.time_offset);
vh.location = (TextView) v.findViewById(R.id.location);
v.setTag(vh);
}
}
private Context mContext;
private LayoutInflater mInflater;
private OnTimeZoneSetListener mTimeZoneSetListener;
private TimeZoneData mTimeZoneData;
private int[] mFilteredTimeZoneIndices;
private int mFilteredTimeZoneLength = 0;
public TimeZoneResultAdapter(Context context, TimeZoneData tzd,
com.android.timezonepicker.TimeZonePickerView.OnTimeZoneSetListener l) {
super();
mContext = context;
mTimeZoneData = tzd;
mTimeZoneSetListener = l;
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mFilteredTimeZoneIndices = new int[mTimeZoneData.size()];
onSetFilter(TimeZoneFilterTypeAdapter.FILTER_TYPE_NONE, null, 0);
}
public boolean hasResults() {
return mHasResults;
}
public int getLastFilterType() {
return mLastFilterType;
}
public String getLastFilterString() {
return mLastFilterString;
}
public int getLastFilterTime() {
return mLastFilterTime;
}
// Implements OnSetFilterListener
@Override
public void onSetFilter(int filterType, String str, int time) {
if (DEBUG) {
Log.d(TAG, "onSetFilter: " + filterType + " [" + str + "] " + time);
}
mLastFilterType = filterType;
mLastFilterString = str;
mLastFilterTime = time;
mFilteredTimeZoneLength = 0;
int idx = 0;
switch (filterType) {
case TimeZoneFilterTypeAdapter.FILTER_TYPE_EMPTY:
mFilteredTimeZoneIndices[mFilteredTimeZoneLength++] = EMPTY_INDEX;
break;
case TimeZoneFilterTypeAdapter.FILTER_TYPE_NONE:
// Show the default/current value first
int defaultTzIndex = mTimeZoneData.getDefaultTimeZoneIndex();
if (defaultTzIndex != -1) {
mFilteredTimeZoneIndices[mFilteredTimeZoneLength++] = defaultTzIndex;
}
// Show the recent selections
SharedPreferences prefs = mContext.getSharedPreferences(SHARED_PREFS_NAME,
Context.MODE_PRIVATE);
String recentsString = prefs.getString(KEY_RECENT_TIMEZONES, null);
if (!TextUtils.isEmpty(recentsString)) {
String[] recents = recentsString.split(RECENT_TIMEZONES_DELIMITER);
for (int i = recents.length - 1; i >= 0; i--) {
if (!TextUtils.isEmpty(recents[i])
&& !recents[i].equals(mTimeZoneData.mDefaultTimeZoneId)) {
int index = mTimeZoneData.findIndexByTimeZoneIdSlow(recents[i]);
if (index != -1) {
mFilteredTimeZoneIndices[mFilteredTimeZoneLength++] = index;
}
}
}
}
break;
case TimeZoneFilterTypeAdapter.FILTER_TYPE_GMT:
ArrayList<Integer> indices = mTimeZoneData.getTimeZonesByOffset(time);
if (indices != null) {
for (Integer i : indices) {
mFilteredTimeZoneIndices[mFilteredTimeZoneLength++] = i;
}
}
break;
case TimeZoneFilterTypeAdapter.FILTER_TYPE_COUNTRY:
ArrayList<Integer> tzIds = mTimeZoneData.mTimeZonesByCountry.get(str);
if (tzIds != null) {
for (Integer tzi : tzIds) {
mFilteredTimeZoneIndices[mFilteredTimeZoneLength++] = tzi;
}
}
break;
case TimeZoneFilterTypeAdapter.FILTER_TYPE_STATE:
// TODO Filter by state
break;
default:
throw new IllegalArgumentException();
}
mHasResults = mFilteredTimeZoneLength > 0;
notifyDataSetChanged();
}
/**
* Saves the given timezone ID as a recent timezone under shared
* preferences. If there are already the maximum number of recent timezones
* saved, it will remove the oldest and append this one.
*
* @param id the ID of the timezone to save
* @see {@link #MAX_RECENT_TIMEZONES}
*/
public void saveRecentTimezone(String id) {
SharedPreferences prefs = mContext.getSharedPreferences(SHARED_PREFS_NAME,
Context.MODE_PRIVATE);
String recentsString = prefs.getString(KEY_RECENT_TIMEZONES, null);
if (recentsString == null) {
recentsString = id;
} else {
// De-dup
LinkedHashSet<String> recents = new LinkedHashSet<String>();
for(String tzId : recentsString.split(RECENT_TIMEZONES_DELIMITER)) {
if (!recents.contains(tzId) && !id.equals(tzId)) {
recents.add(tzId);
}
}
Iterator<String> it = recents.iterator();
while (recents.size() >= MAX_RECENT_TIMEZONES) {
if (!it.hasNext()) {
break;
}
it.next();
it.remove();
}
recents.add(id);
StringBuilder builder = new StringBuilder();
boolean first = true;
for (String recent : recents) {
if (first) {
first = false;
} else {
builder.append(RECENT_TIMEZONES_DELIMITER);
}
builder.append(recent);
}
recentsString = builder.toString();
}
prefs.edit().putString(KEY_RECENT_TIMEZONES, recentsString).apply();
}
@Override
public int getCount() {
return mFilteredTimeZoneLength;
}
@Override
public Object getItem(int position) {
if (position < 0 || position >= mFilteredTimeZoneLength) {
return null;
}
return mTimeZoneData.get(mFilteredTimeZoneIndices[position]);
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return mFilteredTimeZoneIndices[position] >= 0;
}
@Override
public long getItemId(int position) {
return mFilteredTimeZoneIndices[position];
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (mFilteredTimeZoneIndices[position] == EMPTY_INDEX) {
v = mInflater.inflate(R.layout.empty_time_zone_item, null);
return v;
}
// We'll need to re-inflate the view if it was null, or if it was used as an empty item.
if (v == null || v.findViewById(R.id.empty_item) != null) {
v = mInflater.inflate(R.layout.time_zone_item, null);
ViewHolder.setupViewHolder(v);
}
ViewHolder vh = (ViewHolder) v.getTag();
TimeZoneInfo tzi = mTimeZoneData.get(mFilteredTimeZoneIndices[position]);
v.setTag(VIEW_TAG_TIME_ZONE, tzi);
vh.timeZone.setText(tzi.mDisplayName);
vh.timeOffset.setText(tzi.getGmtDisplayName(mContext));
String location = tzi.mCountry;
if (location == null) {
vh.location.setVisibility(View.INVISIBLE);
} else {
vh.location.setText(location);
vh.location.setVisibility(View.VISIBLE);
}
return v;
}
@Override
public boolean hasStableIds() {
return true;
}
// Implements OnItemClickListener
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
if (mTimeZoneSetListener != null) {
TimeZoneInfo tzi = (TimeZoneInfo) v.getTag(VIEW_TAG_TIME_ZONE);
if (tzi != null) {
mTimeZoneSetListener.onTimeZoneSet(tzi);
saveRecentTimezone(tzi.mTzId);
}
}
}
}
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