MessageAttachmentTile.java revision 1867a56f7b9b3146829752b942285ffdc9b3f3de 
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
18package com.android.mail.browse;
19
20import android.app.FragmentManager;
21import android.content.ActivityNotFoundException;
22import android.content.Context;
23import android.content.Intent;
24import android.graphics.Bitmap;
25import android.net.Uri;
26import android.util.AttributeSet;
27import android.view.LayoutInflater;
28import android.view.View;
29import android.view.View.OnClickListener;
30import android.view.ViewGroup;
31import android.view.ViewParent;
32
33import com.android.ex.photo.Intents;
34import com.android.ex.photo.Intents.PhotoViewIntentBuilder;
35import com.android.ex.photo.util.ImageUtils;
36import com.android.mail.R;
37import com.android.mail.photo.MailPhotoViewActivity;
38import com.android.mail.providers.Attachment;
39import com.android.mail.providers.UIProvider;
40import com.android.mail.providers.UIProvider.AttachmentDestination;
41import com.android.mail.providers.UIProvider.AttachmentRendition;
42import com.android.mail.ui.AttachmentTile;
43import com.android.mail.ui.AttachmentTileGrid;
44import com.android.mail.utils.LogTag;
45import com.android.mail.utils.LogUtils;
46import com.android.mail.utils.Utils;
47
48import java.util.Comparator;
49import java.util.PriorityQueue;
50
51/**
52 * View for a single attachment in conversation view. Shows download status and allows launching
53 * intents to act on an attachment.
54 *
55 */
56public class MessageAttachmentTile extends AttachmentTile implements OnClickListener,
57        AttachmentViewInterface {
58
59    private int mPhotoIndex;
60    private Uri mAttachmentsListUri;
61    private View mTextContainer;
62
63    private final AttachmentActionHandler mActionHandler;
64
65    private static final String LOG_TAG = LogTag.getLogTag();
66
67    public MessageAttachmentTile(Context context) {
68        this(context, null);
69    }
70
71    public MessageAttachmentTile(Context context, AttributeSet attrs) {
72        super(context, attrs);
73
74        mActionHandler = new AttachmentActionHandler(context, this);
75    }
76
77    public void initialize(FragmentManager fragmentManager) {
78        mActionHandler.initialize(fragmentManager);
79    }
80
81    /**
82     * Render or update an attachment's view. This happens immediately upon instantiation, and
83     * repeatedly as status updates stream in, so only properties with new or changed values will
84     * cause sub-views to update.
85     */
86    @Override
87    public void render(Attachment attachment, Uri attachmentsListUri, int index,
88            AttachmentPreviewCache attachmentPreviewCache, boolean loaderResult) {
89        super.render(attachment, attachmentsListUri, index, attachmentPreviewCache, loaderResult);
90
91        mAttachmentsListUri = attachmentsListUri;
92        mPhotoIndex = index;
93
94        mActionHandler.setAttachment(mAttachment);
95        mActionHandler.updateStatus(loaderResult);
96    }
97
98    public static MessageAttachmentTile inflate(LayoutInflater inflater, ViewGroup parent) {
99        MessageAttachmentTile view = (MessageAttachmentTile) inflater.inflate(
100                R.layout.conversation_message_attachment_tile, parent, false);
101        return view;
102    }
103
104
105    @Override
106    protected void onFinishInflate() {
107        super.onFinishInflate();
108
109        mTextContainer = findViewById(R.id.attachment_tile_text_container);
110
111        setOnClickListener(this);
112    }
113
114    @Override
115    public void onClick(View v) {
116        onClick(v.getId(), v);
117    }
118
119    private boolean onClick(int res, View v) {
120        showAndDownloadAttachments();
121        return true;
122    }
123
124    private void showAndDownloadAttachments() {
125        AttachmentTileGrid tileGrid = ((AttachmentTileGrid) getParent());
126        int childCount = tileGrid.getChildCount();
127
128        PriorityQueue<MessageAttachmentTile> queue = new PriorityQueue<MessageAttachmentTile>(
129                childCount, new ViewIndexDistanceComparator(mPhotoIndex));
130        for (int i = 0; i < childCount; i++) {
131            MessageAttachmentTile tile = (MessageAttachmentTile) tileGrid.getChildAt(i);
132            queue.add(tile);
133        }
134
135        // we want our downloads to have higher priority than the highest background downloads
136        int maxAdditionalPriority = childCount;
137        for (int i = 0; i < childCount; i++) {
138            // higher priority tiles are returned first
139            MessageAttachmentTile tile = queue.remove();
140            tile.downloadAttachment(maxAdditionalPriority - i, i != 0);
141        }
142
143        viewAttachment();
144    }
145
146    public void downloadAttachment(int additionalPriority, boolean delayDownload) {
147        if (!mAttachment.isPresentLocally()) {
148            mActionHandler.startDownloadingAttachment(AttachmentDestination.CACHE,
149                    UIProvider.AttachmentRendition.BEST, additionalPriority, delayDownload);
150        }
151    }
152
153    @Override
154    public void viewAttachment() {
155        if (ImageUtils.isImageMimeType(
156                Utils.normalizeMimeType(mAttachment.name, mAttachment.contentType))) {
157            final PhotoViewIntentBuilder builder =
158                    Intents.newPhotoViewIntentBuilder(getContext(), MailPhotoViewActivity.class);
159            builder
160                .setPhotosUri(mAttachmentsListUri.toString())
161                .setProjection(UIProvider.ATTACHMENT_PROJECTION)
162                .setPhotoIndex(mPhotoIndex);
163
164            getContext().startActivity(builder.build());
165            return;
166        }
167
168        Intent intent = new Intent(Intent.ACTION_VIEW);
169        intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION
170                | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
171        Utils.setIntentDataAndTypeAndNormalize(intent, mAttachment.contentUri, mAttachment.name,
172                mAttachment.contentType);
173        try {
174            getContext().startActivity(intent);
175        } catch (ActivityNotFoundException e) {
176            // couldn't find activity for View intent
177            LogUtils.e(LOG_TAG, "Coun't find Activity for intent", e);
178        }
179    }
180
181    @Override
182    public void updateProgress(boolean showDeterminateProgress) {
183        // do not show progress for image tiles
184    }
185
186    @Override
187    public void onUpdateStatus() {
188    }
189
190    @Override
191    public void setThumbnailToDefault() {
192        super.setThumbnailToDefault();
193        mTextContainer.setVisibility(VISIBLE);
194    }
195
196    @Override
197    public void setThumbnail(Bitmap result) {
198        super.setThumbnail(result);
199        mTextContainer.setVisibility(GONE);
200    }
201
202    @Override
203    public void thumbnailLoadFailed() {
204        super.thumbnailLoadFailed();
205        mActionHandler.startDownloadingAttachment(
206                AttachmentDestination.CACHE, AttachmentRendition.SIMPLE, 0, false);
207    }
208
209    /**
210     * Given two child views, figure out whose index is closest to the specified
211     * index. (generated by markwei)
212     */
213    public static class ViewIndexDistanceComparator implements Comparator<View>{
214        final private int mIndex;
215        /**
216         * @param index Compare based on each view's distance to this index
217         */
218        public ViewIndexDistanceComparator(int index) {
219            mIndex = index;
220        }
221
222        @Override
223        public int compare(View lhs, View rhs) {
224            ViewParent parent = lhs.getParent();
225            if (parent == rhs.getParent()) {
226                if (parent instanceof ViewGroup) {
227                    ViewGroup p = (ViewGroup) parent;
228                    int lhsIndex = p.indexOfChild(lhs);
229                    int rhsIndex = p.indexOfChild(rhs);
230                    int lhsDistance = Math.abs(mIndex - lhsIndex);
231                    int rhsDistance = Math.abs(mIndex - rhsIndex);
232                    // prefer shorter distance since they are the next ones to be swiped to
233                    int result = lhsDistance - rhsDistance;
234                    if (result == 0) {
235                        // prefer higher index since they are to the right in the photoviewer
236                        return rhsIndex - lhsIndex;
237                    }
238                    return result;
239                }
240            }
241            return 0;
242        }
243    }
244}
245