michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.home;
michael@0: 
michael@0: import org.mozilla.gecko.home.HomeConfig.PanelConfig;
michael@0: import org.mozilla.gecko.home.HomeConfig.PanelType;
michael@0: import org.mozilla.gecko.home.HomePager;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.os.Bundle;
michael@0: import android.support.v4.app.Fragment;
michael@0: import android.support.v4.app.FragmentManager;
michael@0: import android.support.v4.app.FragmentStatePagerAdapter;
michael@0: import android.view.ViewGroup;
michael@0: 
michael@0: import java.util.ArrayList;
michael@0: import java.util.HashMap;
michael@0: import java.util.List;
michael@0: 
michael@0: class HomeAdapter extends FragmentStatePagerAdapter {
michael@0: 
michael@0:     private final Context mContext;
michael@0:     private final ArrayList<PanelInfo> mPanelInfos;
michael@0:     private final HashMap<String, Fragment> mPanels;
michael@0: 
michael@0:     private boolean mCanLoadHint;
michael@0: 
michael@0:     private OnAddPanelListener mAddPanelListener;
michael@0: 
michael@0:     interface OnAddPanelListener {
michael@0:         public void onAddPanel(String title);
michael@0:     }
michael@0: 
michael@0:     public HomeAdapter(Context context, FragmentManager fm) {
michael@0:         super(fm);
michael@0: 
michael@0:         mContext = context;
michael@0:         mCanLoadHint = HomeFragment.DEFAULT_CAN_LOAD_HINT;
michael@0: 
michael@0:         mPanelInfos = new ArrayList<PanelInfo>();
michael@0:         mPanels = new HashMap<String, Fragment>();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public int getCount() {
michael@0:         return mPanelInfos.size();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public Fragment getItem(int position) {
michael@0:         PanelInfo info = mPanelInfos.get(position);
michael@0:         return Fragment.instantiate(mContext, info.getClassName(), info.getArgs());
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public CharSequence getPageTitle(int position) {
michael@0:         if (mPanelInfos.size() > 0) {
michael@0:             PanelInfo info = mPanelInfos.get(position);
michael@0:             return info.getTitle().toUpperCase();
michael@0:         }
michael@0: 
michael@0:         return null;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public Object instantiateItem(ViewGroup container, int position) {
michael@0:         Fragment fragment = (Fragment) super.instantiateItem(container, position);
michael@0:         mPanels.put(mPanelInfos.get(position).getId(), fragment);
michael@0: 
michael@0:         return fragment;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void destroyItem(ViewGroup container, int position, Object object) {
michael@0:         super.destroyItem(container, position, object);
michael@0:         mPanels.remove(mPanelInfos.get(position).getId());
michael@0:     }
michael@0: 
michael@0:     public void setOnAddPanelListener(OnAddPanelListener listener) {
michael@0:         mAddPanelListener = listener;
michael@0:     }
michael@0: 
michael@0:     public int getItemPosition(String panelId) {
michael@0:         for (int i = 0; i < mPanelInfos.size(); i++) {
michael@0:             final String id = mPanelInfos.get(i).getId();
michael@0:             if (id.equals(panelId)) {
michael@0:                 return i;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         return -1;
michael@0:     }
michael@0: 
michael@0:     public String getPanelIdAtPosition(int position) {
michael@0:         // getPanelIdAtPosition() might be called before HomeAdapter
michael@0:         // has got its initial list of PanelConfigs. Just bail.
michael@0:         if (mPanelInfos.isEmpty()) {
michael@0:             return null;
michael@0:         }
michael@0: 
michael@0:         return mPanelInfos.get(position).getId();
michael@0:     }
michael@0: 
michael@0:     private void addPanel(PanelInfo info) {
michael@0:         mPanelInfos.add(info);
michael@0: 
michael@0:         if (mAddPanelListener != null) {
michael@0:             mAddPanelListener.onAddPanel(info.getTitle());
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public void update(List<PanelConfig> panelConfigs) {
michael@0:         mPanels.clear();
michael@0:         mPanelInfos.clear();
michael@0: 
michael@0:         if (panelConfigs != null) {
michael@0:             for (PanelConfig panelConfig : panelConfigs) {
michael@0:                 final PanelInfo info = new PanelInfo(panelConfig);
michael@0:                 addPanel(info);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         notifyDataSetChanged();
michael@0:     }
michael@0: 
michael@0:     public boolean getCanLoadHint() {
michael@0:         return mCanLoadHint;
michael@0:     }
michael@0: 
michael@0:     public void setCanLoadHint(boolean canLoadHint) {
michael@0:         // We cache the last hint value so that we can use it when
michael@0:         // creating new panels. See PanelInfo.getArgs().
michael@0:         mCanLoadHint = canLoadHint;
michael@0: 
michael@0:         // Enable/disable loading on all existing panels
michael@0:         for (Fragment panelFragment : mPanels.values()) {
michael@0:             final HomeFragment panel = (HomeFragment) panelFragment;
michael@0:             panel.setCanLoadHint(canLoadHint);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private final class PanelInfo {
michael@0:         private final PanelConfig mPanelConfig;
michael@0: 
michael@0:         PanelInfo(PanelConfig panelConfig) {
michael@0:             mPanelConfig = panelConfig;
michael@0:         }
michael@0: 
michael@0:         public String getId() {
michael@0:             return mPanelConfig.getId();
michael@0:         }
michael@0: 
michael@0:         public String getTitle() {
michael@0:             return mPanelConfig.getTitle();
michael@0:         }
michael@0: 
michael@0:         public String getClassName() {
michael@0:             final PanelType type = mPanelConfig.getType();
michael@0:             return type.getPanelClass().getName();
michael@0:         }
michael@0: 
michael@0:         public Bundle getArgs() {
michael@0:             final Bundle args = new Bundle();
michael@0: 
michael@0:             args.putBoolean(HomePager.CAN_LOAD_ARG, mCanLoadHint);
michael@0: 
michael@0:             // Only DynamicPanels need the PanelConfig argument
michael@0:             if (mPanelConfig.isDynamic()) {
michael@0:                 args.putParcelable(HomePager.PANEL_CONFIG_ARG, mPanelConfig);
michael@0:             }
michael@0: 
michael@0:             return args;
michael@0:         }
michael@0:     }
michael@0: }