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.ItemType;
michael@0: import org.mozilla.gecko.home.HomeConfig.ViewConfig;
michael@0: import org.mozilla.gecko.home.PanelLayout.FilterManager;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.database.Cursor;
michael@0: import android.support.v4.widget.CursorAdapter;
michael@0: import android.view.View;
michael@0: import android.view.ViewGroup;
michael@0: 
michael@0: class PanelViewAdapter extends CursorAdapter {
michael@0:     private static final int VIEW_TYPE_ITEM = 0;
michael@0:     private static final int VIEW_TYPE_BACK = 1;
michael@0: 
michael@0:     private final ViewConfig viewConfig;
michael@0:     private FilterManager filterManager;
michael@0:     private final Context context;
michael@0: 
michael@0:     public PanelViewAdapter(Context context, ViewConfig viewConfig) {
michael@0:         super(context, null, 0);
michael@0:         this.context = context;
michael@0:         this.viewConfig = viewConfig;
michael@0:     }
michael@0: 
michael@0:     public void setFilterManager(FilterManager manager) {
michael@0:         this.filterManager = manager;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public final int getViewTypeCount() {
michael@0:         return 2;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public int getCount() {
michael@0:         return super.getCount() + (isShowingBack() ? 1 : 0);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public int getItemViewType(int position) {
michael@0:         if (isShowingBack() && position == 0) {
michael@0:             return VIEW_TYPE_BACK;
michael@0:         } else {
michael@0:             return VIEW_TYPE_ITEM;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public final View getView(int position, View convertView, ViewGroup parent) {
michael@0:         if (convertView == null) {
michael@0:             convertView = newView(parent.getContext(), position, parent);
michael@0:         }
michael@0: 
michael@0:         bindView(convertView, position);
michael@0:         return convertView;
michael@0:     }
michael@0: 
michael@0:     private View newView(Context context, int position, ViewGroup parent) {
michael@0:         if (getItemViewType(position) == VIEW_TYPE_BACK) {
michael@0:             return new PanelBackItemView(context, viewConfig.getBackImageUrl());
michael@0:         } else {
michael@0:             return PanelItemView.create(context, viewConfig.getItemType());
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private void bindView(View view, int position) {
michael@0:         if (isShowingBack()) {
michael@0:             if (position == 0) {
michael@0:                 final PanelBackItemView item = (PanelBackItemView) view;
michael@0:                 item.updateFromFilter(filterManager.getPreviousFilter());
michael@0:                 return;
michael@0:             }
michael@0: 
michael@0:             position--;
michael@0:         }
michael@0: 
michael@0:         final Cursor cursor = getCursor(position);
michael@0:         final PanelItemView item = (PanelItemView) view;
michael@0:         item.updateFromCursor(cursor);
michael@0:     }
michael@0: 
michael@0:     private boolean isShowingBack() {
michael@0:         return (filterManager != null ? filterManager.canGoBack() : false);
michael@0:     }
michael@0: 
michael@0:     private final Cursor getCursor(int position) {
michael@0:         final Cursor cursor = getCursor();
michael@0:         if (cursor == null || !cursor.moveToPosition(position)) {
michael@0:             throw new IllegalStateException("Couldn't move cursor to position " + position);
michael@0:         }
michael@0: 
michael@0:         return cursor;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public final void bindView(View view, Context context, Cursor cursor) {
michael@0:         // Do nothing.
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public final View newView(Context context, Cursor cursor, ViewGroup parent) {
michael@0:         return null;
michael@0:     }
michael@0: }