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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.home;
import org.mozilla.gecko.activitystream.ActivityStream;
import org.mozilla.gecko.home.HomeConfig.PanelConfig;
import org.mozilla.gecko.home.HomeConfig.PanelType;
import org.mozilla.gecko.home.activitystream.ActivityStreamHomeFragment;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class HomeAdapter extends FragmentStatePagerAdapter {
private final Context mContext;
private final ArrayList<PanelInfo> mPanelInfos;
private final Map<String, HomeFragment> mPanels;
private final Map<String, Bundle> mRestoreBundles;
private boolean mCanLoadHint;
private OnAddPanelListener mAddPanelListener;
private HomeFragment.PanelStateChangeListener mPanelStateChangeListener = null;
public interface OnAddPanelListener {
void onAddPanel(String title);
}
public void setPanelStateChangeListener(HomeFragment.PanelStateChangeListener listener) {
mPanelStateChangeListener = listener;
for (Fragment fragment : mPanels.values()) {
((HomeFragment) fragment).setPanelStateChangeListener(listener);
}
}
public HomeAdapter(Context context, FragmentManager fm) {
super(fm);
mContext = context;
mCanLoadHint = HomeFragment.DEFAULT_CAN_LOAD_HINT;
mPanelInfos = new ArrayList<>();
mPanels = new HashMap<>();
mRestoreBundles = new HashMap<>();
}
@Override
public int getCount() {
return mPanelInfos.size();
}
@Override
public Fragment getItem(int position) {
PanelInfo info = mPanelInfos.get(position);
return Fragment.instantiate(mContext, info.getClassName(mContext), info.getArgs());
}
@Override
public CharSequence getPageTitle(int position) {
if (mPanelInfos.size() > 0) {
PanelInfo info = mPanelInfos.get(position);
return info.getTitle().toUpperCase();
}
return null;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
final HomeFragment fragment = (HomeFragment) super.instantiateItem(container, position);
fragment.setPanelStateChangeListener(mPanelStateChangeListener);
final String id = mPanelInfos.get(position).getId();
mPanels.put(id, fragment);
if (mRestoreBundles.containsKey(id)) {
fragment.restoreData(mRestoreBundles.get(id));
mRestoreBundles.remove(id);
}
return fragment;
}
public void setRestoreData(int position, Bundle data) {
final String id = mPanelInfos.get(position).getId();
final HomeFragment fragment = mPanels.get(id);
// We have no guarantees as to whether our desired fragment is instantiated yet: therefore
// we might need to either pass data to the fragment, or store it for later.
if (fragment != null) {
fragment.restoreData(data);
} else {
mRestoreBundles.put(id, data);
}
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
final String id = mPanelInfos.get(position).getId();
super.destroyItem(container, position, object);
mPanels.remove(id);
}
public void setOnAddPanelListener(OnAddPanelListener listener) {
mAddPanelListener = listener;
}
public int getItemPosition(String panelId) {
for (int i = 0; i < mPanelInfos.size(); i++) {
final String id = mPanelInfos.get(i).getId();
if (id.equals(panelId)) {
return i;
}
}
return -1;
}
public String getPanelIdAtPosition(int position) {
// getPanelIdAtPosition() might be called before HomeAdapter
// has got its initial list of PanelConfigs. Just bail.
if (mPanelInfos.isEmpty()) {
return null;
}
return mPanelInfos.get(position).getId();
}
private void addPanel(PanelInfo info) {
mPanelInfos.add(info);
if (mAddPanelListener != null) {
mAddPanelListener.onAddPanel(info.getTitle());
}
}
public void update(List<PanelConfig> panelConfigs) {
mPanels.clear();
mPanelInfos.clear();
if (panelConfigs != null) {
for (PanelConfig panelConfig : panelConfigs) {
final PanelInfo info = new PanelInfo(panelConfig);
addPanel(info);
}
}
notifyDataSetChanged();
}
public boolean getCanLoadHint() {
return mCanLoadHint;
}
public void setCanLoadHint(boolean canLoadHint) {
// We cache the last hint value so that we can use it when
// creating new panels. See PanelInfo.getArgs().
mCanLoadHint = canLoadHint;
// Enable/disable loading on all existing panels
for (Fragment panelFragment : mPanels.values()) {
final HomeFragment panel = (HomeFragment) panelFragment;
panel.setCanLoadHint(canLoadHint);
}
}
private final class PanelInfo {
private final PanelConfig mPanelConfig;
PanelInfo(PanelConfig panelConfig) {
mPanelConfig = panelConfig;
}
public String getId() {
return mPanelConfig.getId();
}
public String getTitle() {
return mPanelConfig.getTitle();
}
public String getClassName(Context context) {
final PanelType type = mPanelConfig.getType();
// Override top_sites with ActivityStream panel when enabled
// PanelType.toString() returns the panel id
if (type.toString() == "top_sites" &&
ActivityStream.isEnabled(context) &&
ActivityStream.isHomePanel()) {
return ActivityStreamHomeFragment.class.getName();
}
return type.getPanelClass().getName();
}
public Bundle getArgs() {
final Bundle args = new Bundle();
args.putBoolean(HomePager.CAN_LOAD_ARG, mCanLoadHint);
// Only DynamicPanels need the PanelConfig argument
if (mPanelConfig.isDynamic()) {
args.putParcelable(HomePager.PANEL_CONFIG_ARG, mPanelConfig);
}
return args;
}
}
}
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