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      1 /*
      2  * Copyright (C) 2012 Google Inc.
      3  * Licensed to The Android Open Source Project.
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.mail.browse;
     19 
     20 import android.content.Context;
     21 import android.net.Uri;
     22 import android.os.Bundle;
     23 import android.util.AttributeSet;
     24 import android.view.View;
     25 import android.widget.LinearLayout;
     26 
     27 import com.android.mail.R;
     28 import com.android.mail.providers.Folder;
     29 import com.android.mail.providers.UIProvider;
     30 
     31 public final class ConversationListFooterView extends LinearLayout implements View.OnClickListener {
     32 
     33     public interface FooterViewClickListener {
     34         void onFooterViewLoadMoreClick(Folder folder);
     35     }
     36 
     37     private View mLoading;
     38     private View mLoadMore;
     39     private Uri mLoadMoreUri;
     40     private FooterViewClickListener mClickListener;
     41 
     42     public ConversationListFooterView(Context context, AttributeSet attrs) {
     43         super(context, attrs);
     44     }
     45 
     46     @Override
     47     protected void onFinishInflate() {
     48         super.onFinishInflate();
     49 
     50         mLoading = findViewById(R.id.loading);
     51         mLoadMore = findViewById(R.id.load_more);
     52         mLoadMore.setOnClickListener(this);
     53     }
     54 
     55     public void setClickListener(FooterViewClickListener listener) {
     56         mClickListener = listener;
     57     }
     58 
     59     @Override
     60     public void onClick(View v) {
     61         final int id = v.getId();
     62         final Folder f = (Folder) v.getTag();
     63         if (id == R.id.load_more) {
     64             mClickListener.onFooterViewLoadMoreClick(f);
     65         }
     66     }
     67 
     68     public void setFolder(Folder folder) {
     69         mLoadMore.setTag(folder);
     70         mLoadMoreUri = folder.loadMoreUri;
     71     }
     72 
     73     /**
     74      * Update the view to reflect the new folder status.
     75      */
     76     public boolean updateStatus(final ConversationCursor cursor) {
     77         if (cursor == null) {
     78             mLoading.setVisibility(View.GONE);
     79             mLoadMore.setVisibility(View.GONE);
     80             return false;
     81         }
     82         boolean showFooter = true;
     83         final Bundle extras = cursor.getExtras();
     84         final int cursorStatus = extras.getInt(UIProvider.CursorExtraKeys.EXTRA_STATUS);
     85         final int totalCount = extras.getInt(UIProvider.CursorExtraKeys.EXTRA_TOTAL_COUNT);
     86 
     87         if (UIProvider.CursorStatus.isWaitingForResults(cursorStatus)) {
     88             if (cursor.getCount() != 0) {
     89                 // When loading more, show the spinner in the footer.
     90                 mLoading.setVisibility(View.VISIBLE);
     91                 mLoadMore.setVisibility(View.GONE);
     92             } else {
     93                 // We're currently loading, but we have no messages at all. We don't need to show
     94                 // the footer, because we should be displaying the loading state on the
     95                 // conversation list itself.
     96                 showFooter = false;
     97             }
     98 
     99         } else if (mLoadMoreUri != null && cursor.getCount() < totalCount) {
    100             // We know that there are more messages on the server than we have locally, so we
    101             // need to show the footer with the "load more" button.
    102             mLoading.setVisibility(View.GONE);
    103             mLoadMore.setVisibility(View.VISIBLE);
    104         } else {
    105             showFooter = false;
    106         }
    107         return showFooter;
    108     }
    109 }
    110