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      1 /**
      2  * Copyright (c) 2013, Google Inc.
      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 
     17 package com.android.mail.ui;
     18 
     19 import android.graphics.Paint;
     20 import android.graphics.Typeface;
     21 import android.text.TextPaint;
     22 import android.text.style.TypefaceSpan;
     23 
     24 /**
     25  * CustomTypefaceSpan allows for the use of a non-framework font supplied in the
     26  * assets/fonts directory of the application. Use this class whenever the
     27  * framework does not contain a needed font.
     28  */
     29 public class CustomTypefaceSpan extends TypefaceSpan {
     30     private final Typeface newType;
     31     private int newColor;
     32     private int newSize;
     33 
     34     /**
     35      * @param family Ignored since this uses a completely custom included font.
     36      * @param type Typeface, specified as: Typeface.createFromAsset(
     37      *            context.getAssets(), "fonts/Roboto-Medium.ttf"),
     38      * @param size Desired font size; this should have already been converted
     39      *            from a dimension.
     40      * @param color Desired font color; this should have already been converted
     41      *            to an integer representation of a color.
     42      */
     43     public CustomTypefaceSpan(String family, Typeface type, int size, int color) {
     44         super(family);
     45         newType = type;
     46         newSize = size;
     47         newColor = color;
     48     }
     49 
     50     @Override
     51     public void updateDrawState(TextPaint ds) {
     52         applyCustomTypeFace(ds, newType, newSize, newColor);
     53     }
     54 
     55     @Override
     56     public void updateMeasureState(TextPaint paint) {
     57         applyCustomTypeFace(paint, newType, newSize, newColor);
     58     }
     59 
     60     private static void applyCustomTypeFace(Paint paint, Typeface tf, int newSize, int newColor) {
     61         int oldStyle;
     62         Typeface old = paint.getTypeface();
     63         if (old == null) {
     64             oldStyle = 0;
     65         } else {
     66             oldStyle = old.getStyle();
     67         }
     68 
     69         int fake = oldStyle & ~tf.getStyle();
     70         if ((fake & Typeface.BOLD) != 0) {
     71             paint.setFakeBoldText(true);
     72         }
     73 
     74         if ((fake & Typeface.ITALIC) != 0) {
     75             paint.setTextSkewX(-0.25f);
     76         }
     77 
     78         paint.setTextSize(newSize);
     79         paint.setColor(newColor);
     80         paint.setTypeface(tf);
     81     }
     82 }