1 files changed, 101 insertions, 0 deletions
diff --git a/src/com/android/mail/photomanager/LetterTileProvider.java b/src/com/android/mail/photomanager/LetterTileProvider.java
new file mode 100644
index 000000000..85febe883
--- /dev/null
+++ b/src/com/android/mail/photomanager/LetterTileProvider.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.mail.photomanager;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.text.TextPaint;
+import android.text.TextUtils;
+import android.util.LruCache;
+import android.util.TypedValue;
+
+import com.android.mail.R;
+import com.android.mail.photomanager.ContactPhotoManager.DefaultImageProvider;
+import com.android.mail.ui.DividedImageCanvas;
+
+/**
+ * LetterTileProvider is an implementation of the DefaultImageProvider. When no
+ * matching contact photo is found, and there is a supplied displayName or email
+ * address whose first letter corresponds to an English alphabet letter (or
+ * number), this method creates a bitmap with the letter in the center of a
+ * tile. If there is no English alphabet character (or digit), it creates a
+ * bitmap with the default contact avatar.
+ */
+public class LetterTileProvider extends DefaultImageProvider {
+    private Bitmap mDefaultBitmap;
+    private final LruCache<String, Bitmap> mTileBitmapCache;
+    private static int sTilePaddingBottom;
+    private static int sTilePaddingLeft;
+    private static int sTileLetterFontSize = -1;
+    private static TextPaint sPaint = new TextPaint();
+    private static int DEFAULT_AVATAR_DRAWABLE = R.drawable.ic_contact_picture;
+
+    public LetterTileProvider() {
+        super();
+        final float cacheSizeAdjustment =
+                (MemoryUtils.getTotalMemorySize() >= MemoryUtils.LARGE_RAM_THRESHOLD) ?
+                1.0f : 0.5f;
+        final int bitmapCacheSize = (int) (cacheSizeAdjustment * 26);
+        mTileBitmapCache = new LruCache<String, Bitmap>(bitmapCacheSize);
+    }
+
+    @Override
+    public void applyDefaultImage(String displayName, String address, DividedImageCanvas view,
+            int extent) {
+        String display = !TextUtils.isEmpty(displayName) ? displayName : address;
+        String firstChar = display.substring(0, 1).toUpperCase();
+        Bitmap bitmap;
+        byte[] bytes = firstChar.getBytes();
+        // If its a valid ascii character...
+        if (bytes[0] > 31 && bytes[0] < 253) {
+            bitmap = mTileBitmapCache.get(firstChar);
+            if (bitmap == null) {
+                // Create bitmap based on the first char
+                int width = view.getWidth();
+                int height = view.getHeight();
+                bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+                Canvas c = new Canvas(bitmap);
+                sPaint.setColor(Color.BLACK);
+                if (sTileLetterFontSize == -1) {
+                    final Resources res = view.getContext().getResources();
+                    sTileLetterFontSize = res
+                            .getDimensionPixelSize(R.dimen.tile_letter_font_size);
+                    sTilePaddingBottom = res
+                            .getDimensionPixelSize(R.dimen.tile_letter_padding_bottom);
+                    sTilePaddingLeft = res
+                            .getDimensionPixelSize(R.dimen.tile_letter_padding_left);
+                }
+                sPaint.setTextSize(sTileLetterFontSize);
+                c.drawText(firstChar, sTilePaddingLeft, height - sTilePaddingBottom, sPaint);
+                mTileBitmapCache.put(firstChar, bitmap);
+            }
+        } else {
+            if (mDefaultBitmap == null) {
+                BitmapFactory.Options options = new BitmapFactory.Options();
+                options.inMutable = true;
+                mDefaultBitmap = BitmapFactory.decodeResource(view.getContext().getResources(),
+                        DEFAULT_AVATAR_DRAWABLE, options);
+            }
+            bitmap = mDefaultBitmap;
+        }
+        view.addDivisionImage(bitmap, address);
+    }
+}