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
17package com.android.mail.ui;
18
19import android.graphics.Paint;
20import android.graphics.Typeface;
21import android.text.TextPaint;
22import 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 */
29public 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}