The Tor Browser: mobile/android/base/home/PanelViewAdapter.java@fc2d59ddac77

     1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 package org.mozilla.gecko.home;

     8 import org.mozilla.gecko.home.HomeConfig.ItemType;

     9 import org.mozilla.gecko.home.HomeConfig.ViewConfig;

    10 import org.mozilla.gecko.home.PanelLayout.FilterManager;

    12 import org.mozilla.gecko.R;

    14 import android.content.Context;

    15 import android.database.Cursor;

    16 import android.support.v4.widget.CursorAdapter;

    17 import android.view.View;

    18 import android.view.ViewGroup;

    20 class PanelViewAdapter extends CursorAdapter {

    21     private static final int VIEW_TYPE_ITEM = 0;

    22     private static final int VIEW_TYPE_BACK = 1;

    24     private final ViewConfig viewConfig;

    25     private FilterManager filterManager;

    26     private final Context context;

    28     public PanelViewAdapter(Context context, ViewConfig viewConfig) {

    29         super(context, null, 0);

    30         this.context = context;

    31         this.viewConfig = viewConfig;

    32     }

    34     public void setFilterManager(FilterManager manager) {

    35         this.filterManager = manager;

    36     }

    38     @Override

    39     public final int getViewTypeCount() {

    40         return 2;

    41     }

    43     @Override

    44     public int getCount() {

    45         return super.getCount() + (isShowingBack() ? 1 : 0);

    46     }

    48     @Override

    49     public int getItemViewType(int position) {

    50         if (isShowingBack() && position == 0) {

    51             return VIEW_TYPE_BACK;

    52         } else {

    53             return VIEW_TYPE_ITEM;

    54         }

    55     }

    57     @Override

    58     public final View getView(int position, View convertView, ViewGroup parent) {

    59         if (convertView == null) {

    60             convertView = newView(parent.getContext(), position, parent);

    61         }

    63         bindView(convertView, position);

    64         return convertView;

    65     }

    67     private View newView(Context context, int position, ViewGroup parent) {

    68         if (getItemViewType(position) == VIEW_TYPE_BACK) {

    69             return new PanelBackItemView(context, viewConfig.getBackImageUrl());

    70         } else {

    71             return PanelItemView.create(context, viewConfig.getItemType());

    72         }

    73     }

    75     private void bindView(View view, int position) {

    76         if (isShowingBack()) {

    77             if (position == 0) {

    78                 final PanelBackItemView item = (PanelBackItemView) view;

    79                 item.updateFromFilter(filterManager.getPreviousFilter());

    80                 return;

    81             }

    83             position--;

    84         }

    86         final Cursor cursor = getCursor(position);

    87         final PanelItemView item = (PanelItemView) view;

    88         item.updateFromCursor(cursor);

    89     }

    91     private boolean isShowingBack() {

    92         return (filterManager != null ? filterManager.canGoBack() : false);

    93     }

    95     private final Cursor getCursor(int position) {

    96         final Cursor cursor = getCursor();

    97         if (cursor == null || !cursor.moveToPosition(position)) {

    98             throw new IllegalStateException("Couldn't move cursor to position " + position);

    99         }

   101         return cursor;

   102     }

   104     @Override

   105     public final void bindView(View view, Context context, Cursor cursor) {

   106         // Do nothing.

   107     }

   109     @Override

   110     public final View newView(Context context, Cursor cursor, ViewGroup parent) {

   111         return null;

   112     }

   113 }

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