WidgetConversationListItemViewBuilder.java revision 747e678d20e99ddd17953ff4530d2ee3f1c6cfc7 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.mail.widget;
18
19import com.android.mail.R;
20import com.android.mail.providers.Conversation;
21import com.android.mail.providers.Folder;
22import com.android.mail.ui.FolderDisplayer;
23import com.android.mail.utils.FolderUri;
24
25import android.content.Context;
26import android.content.res.Resources;
27import android.graphics.Bitmap;
28import android.graphics.BitmapFactory;
29import android.graphics.Typeface;
30import android.text.Spannable;
31import android.text.SpannableStringBuilder;
32import android.text.style.AbsoluteSizeSpan;
33import android.text.style.ForegroundColorSpan;
34import android.text.style.StyleSpan;
35import android.view.View;
36import android.widget.RemoteViews;
37
38public class WidgetConversationListItemViewBuilder {
39    // Static font sizes
40    private static int DATE_FONT_SIZE;
41    private static int SUBJECT_FONT_SIZE;
42
43    // Static colors
44    private static int SUBJECT_TEXT_COLOR_READ;
45    private static int SUBJECT_TEXT_COLOR_UNREAD;
46    private static int DATE_TEXT_COLOR;
47
48    // Static bitmap
49    private static Bitmap ATTACHMENT;
50
51    private final Context mContext;
52    private WidgetFolderDisplayer mFolderDisplayer;
53
54    /**
55     * Label Displayer for Widget
56     */
57    protected static class WidgetFolderDisplayer extends FolderDisplayer {
58        public WidgetFolderDisplayer(Context context) {
59            super(context);
60        }
61
62        // Maximum number of folders we want to display
63        private static final int MAX_DISPLAYED_FOLDERS_COUNT = 3;
64
65        /*
66         * Load Conversation Labels
67         */
68        @Override
69        public void loadConversationFolders(Conversation conv, final FolderUri ignoreFolderUri,
70                final int ignoreFolderType) {
71            super.loadConversationFolders(conv, ignoreFolderUri, ignoreFolderType);
72        }
73
74        private static int getFolderViewId(int position) {
75            switch (position) {
76                case 0:
77                    return R.id.widget_folder_0;
78                case 1:
79                    return R.id.widget_folder_1;
80                case 2:
81                    return R.id.widget_folder_2;
82            }
83            return 0;
84        }
85
86        /**
87         * Display folders
88         */
89        public void displayFolders(RemoteViews remoteViews) {
90            int displayedFolder = 0;
91            for (Folder folderValues : mFoldersSortedSet) {
92                int viewId = getFolderViewId(displayedFolder);
93                if (viewId == 0) {
94                    continue;
95                }
96                remoteViews.setViewVisibility(viewId, View.VISIBLE);
97                int color[] = new int[] {folderValues.getBackgroundColor(mDefaultBgColor)};
98                Bitmap bitmap = Bitmap.createBitmap(color, 1, 1, Bitmap.Config.RGB_565);
99                remoteViews.setImageViewBitmap(viewId, bitmap);
100
101                if (++displayedFolder == MAX_DISPLAYED_FOLDERS_COUNT) {
102                    break;
103                }
104            }
105
106            for (int i = displayedFolder; i < MAX_DISPLAYED_FOLDERS_COUNT; i++) {
107                remoteViews.setViewVisibility(getFolderViewId(i), View.GONE);
108            }
109        }
110    }
111
112    /*
113     * Get font sizes and bitmaps from Resources
114     */
115    public WidgetConversationListItemViewBuilder(Context context) {
116        mContext = context;
117        Resources res = context.getResources();
118
119        // Initialize font sizes
120        DATE_FONT_SIZE = res.getDimensionPixelSize(R.dimen.widget_date_font_size);
121        SUBJECT_FONT_SIZE = res.getDimensionPixelSize(R.dimen.widget_subject_font_size);
122
123        // Initialize colors
124        SUBJECT_TEXT_COLOR_READ = res.getColor(R.color.subject_text_color_read);
125        SUBJECT_TEXT_COLOR_UNREAD = res.getColor(R.color.subject_text_color_unread);
126        DATE_TEXT_COLOR = res.getColor(R.color.date_text_color);
127
128        // Initialize Bitmap
129        ATTACHMENT = BitmapFactory.decodeResource(res, R.drawable.ic_attachment_holo_light);
130    }
131
132    /*
133     * Add size, color and style to a given text
134     */
135    private static CharSequence addStyle(CharSequence text, int size, int color) {
136        SpannableStringBuilder builder = new SpannableStringBuilder(text);
137        builder.setSpan(
138                new AbsoluteSizeSpan(size), 0, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
139        if (color != 0) {
140            builder.setSpan(new ForegroundColorSpan(color), 0, text.length(),
141                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
142        }
143        return builder;
144    }
145
146    /*
147     * Return the full View
148     */
149    public RemoteViews getStyledView(final CharSequence date, final Conversation conversation,
150            final FolderUri folderUri, final int ignoreFolderType,
151            final SpannableStringBuilder senders, final String filteredSubject) {
152
153        final boolean isUnread = !conversation.read;
154        final String snippet = conversation.getSnippet();
155        final boolean hasAttachments = conversation.hasAttachments;
156
157        // Add style to date
158        final CharSequence styledDate = addStyle(date, DATE_FONT_SIZE, DATE_TEXT_COLOR);
159
160        // Add style to subject
161        final int subjectColor = isUnread ? SUBJECT_TEXT_COLOR_UNREAD : SUBJECT_TEXT_COLOR_READ;
162        final SpannableStringBuilder subjectAndSnippet = new SpannableStringBuilder(
163                Conversation.getSubjectAndSnippetForDisplay(mContext, filteredSubject, snippet));
164        if (isUnread) {
165            subjectAndSnippet.setSpan(new StyleSpan(Typeface.BOLD), 0, filteredSubject.length(),
166                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
167        }
168        subjectAndSnippet.setSpan(new ForegroundColorSpan(subjectColor), 0, subjectAndSnippet
169                .length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
170        final CharSequence styledSubject = addStyle(subjectAndSnippet, SUBJECT_FONT_SIZE, 0);
171
172        // Paper clip for attachment
173        Bitmap paperclipBitmap = null;
174        if (hasAttachments) {
175            paperclipBitmap = ATTACHMENT;
176        }
177
178        // Inflate and fill out the remote view
179        final RemoteViews remoteViews = new RemoteViews(
180                mContext.getPackageName(), R.layout.widget_conversation_list_item);
181        remoteViews.setTextViewText(R.id.widget_senders, senders);
182        remoteViews.setTextViewText(R.id.widget_date, styledDate);
183        remoteViews.setTextViewText(R.id.widget_subject, styledSubject);
184        if (paperclipBitmap != null) {
185            remoteViews.setViewVisibility(R.id.widget_attachment, View.VISIBLE);
186            remoteViews.setImageViewBitmap(R.id.widget_attachment, paperclipBitmap);
187        } else {
188            remoteViews.setViewVisibility(R.id.widget_attachment, View.GONE);
189        }
190        if (isUnread) {
191            remoteViews.setViewVisibility(R.id.widget_unread_background, View.VISIBLE);
192            remoteViews.setViewVisibility(R.id.widget_read_background, View.GONE);
193        } else {
194            remoteViews.setViewVisibility(R.id.widget_unread_background, View.GONE);
195            remoteViews.setViewVisibility(R.id.widget_read_background, View.VISIBLE);
196        }
197        if (mContext.getResources().getBoolean(R.bool.display_folder_colors_in_widget)) {
198            mFolderDisplayer = new WidgetFolderDisplayer(mContext);
199            mFolderDisplayer.loadConversationFolders(conversation, folderUri, ignoreFolderType);
200            mFolderDisplayer.displayFolders(remoteViews);
201        }
202
203        return remoteViews;
204    }
205}
206