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      1 /*
      2  * Copyright (C) 2013 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 package com.android.mail.bitmap;
     17 
     18 import android.content.res.Resources;
     19 import android.graphics.Bitmap;
     20 import android.graphics.BitmapFactory;
     21 import android.graphics.Canvas;
     22 import android.graphics.Paint;
     23 import android.graphics.Paint.Align;
     24 import android.graphics.Rect;
     25 import android.graphics.Typeface;
     26 
     27 import com.android.mail.R;
     28 
     29 /**
     30  * A contact drawable with the default avatar as a letter tile.
     31  */
     32 public class ContactDrawable extends AbstractAvatarDrawable {
     33     /** Letter tile */
     34     private ColorPicker mTileColorPicker;
     35 
     36     /** Reusable components to avoid new allocations */
     37     private static int sTileLetterFontSize;
     38     private static int sTileFontColor;
     39     private static Bitmap DEFAULT_AVATAR;
     40     private static final Paint sPaint = new Paint();
     41     private static final Rect sRect = new Rect();
     42     private static final char[] sFirstChar = new char[1];
     43 
     44     public ContactDrawable(final Resources res) {
     45         super(res);
     46 
     47         if (sTileLetterFontSize == 0) {
     48             sTileLetterFontSize = res.getDimensionPixelSize(R.dimen.tile_letter_font_size_small);
     49             sTileFontColor = res.getColor(R.color.letter_tile_font_color);
     50             DEFAULT_AVATAR = BitmapFactory.decodeResource(res, R.drawable.ic_anonymous_avatar_40dp);
     51 
     52             sPaint.setTypeface(Typeface.create("sans-serif-light", Typeface.NORMAL));
     53             sPaint.setTextAlign(Align.CENTER);
     54             sPaint.setAntiAlias(true);
     55         }
     56     }
     57 
     58     /**
     59      * Sets the {@link ColorPicker} for the background tile used in letter avatars.
     60      * @param colorPicker
     61      */
     62     public void setTileColorPicker(ColorPicker colorPicker) {
     63         mTileColorPicker = colorPicker;
     64     }
     65 
     66     /**
     67      * Returns the color picker for the background tile used in the letter avatars.
     68      * If none was set, initializes a simple {@link ColorPicker.PaletteColorPicker} first.
     69      * @return non-null color picker.
     70      */
     71     public ColorPicker getTileColorPicker() {
     72         if (mTileColorPicker == null) {
     73             mTileColorPicker = new ColorPicker.PaletteColorPicker(mResources);
     74         }
     75         return mTileColorPicker;
     76     }
     77 
     78     @Override
     79     protected void drawDefaultAvatar(Canvas canvas) {
     80         // Draw letter tile as default
     81         drawLetterTile(canvas);
     82     }
     83 
     84     private void drawLetterTile(final Canvas canvas) {
     85         if (mContactRequest == null) {
     86             return;
     87         }
     88 
     89         final Rect bounds = getBounds();
     90 
     91         // Draw background color.
     92         final String email = mContactRequest.getEmail();
     93         // The email should already have been normalized by the ContactRequest.
     94         sPaint.setColor(getTileColorPicker().pickColor(email));
     95         sPaint.setAlpha(mBitmapPaint.getAlpha());
     96         drawCircle(canvas, bounds, sPaint);
     97 
     98         // Draw letter/digit or generic avatar.
     99         final String displayName = mContactRequest.getDisplayName();
    100         final char firstChar = displayName.charAt(0);
    101         if (isEnglishLetterOrDigit(firstChar)) {
    102             // Draw letter or digit.
    103             sFirstChar[0] = Character.toUpperCase(firstChar);
    104             sPaint.setTextSize(sTileLetterFontSize);
    105             sPaint.getTextBounds(sFirstChar, 0, 1, sRect);
    106             sPaint.setColor(sTileFontColor);
    107             canvas.drawText(sFirstChar, 0, 1, bounds.centerX(),
    108                     bounds.centerY() + sRect.height() / 2, sPaint);
    109         } else {
    110             drawBitmap(DEFAULT_AVATAR, DEFAULT_AVATAR.getWidth(), DEFAULT_AVATAR.getHeight(),
    111                     canvas);
    112         }
    113     }
    114 
    115     private static boolean isEnglishLetterOrDigit(final char c) {
    116         return ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z') || ('0' <= c && c <= '9');
    117     }
    118 }
    119