1/* 2 * Copyright (C) 2006 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 android.text.style; 18 19import android.graphics.Paint; 20import android.graphics.Typeface; 21import android.os.Parcel; 22import android.text.ParcelableSpan; 23import android.text.TextPaint; 24import android.text.TextUtils; 25 26/** 27 * Changes the typeface family of the text to which the span is attached. 28 */ 29public class TypefaceSpan extends MetricAffectingSpan implements ParcelableSpan { 30 private final String mFamily; 31 32 /** 33 * @param family The font family for this typeface. Examples include 34 * "monospace", "serif", and "sans-serif". 35 */ 36 public TypefaceSpan(String family) { 37 mFamily = family; 38 } 39 40 public TypefaceSpan(Parcel src) { 41 mFamily = src.readString(); 42 } 43 44 public int getSpanTypeId() { 45 return TextUtils.TYPEFACE_SPAN; 46 } 47 48 public int describeContents() { 49 return 0; 50 } 51 52 public void writeToParcel(Parcel dest, int flags) { 53 dest.writeString(mFamily); 54 } 55 56 /** 57 * Returns the font family name. 58 */ 59 public String getFamily() { 60 return mFamily; 61 } 62 63 @Override 64 public void updateDrawState(TextPaint ds) { 65 apply(ds, mFamily); 66 } 67 68 @Override 69 public void updateMeasureState(TextPaint paint) { 70 apply(paint, mFamily); 71 } 72 73 private static void apply(Paint paint, String family) { 74 int oldStyle; 75 76 Typeface old = paint.getTypeface(); 77 if (old == null) { 78 oldStyle = 0; 79 } else { 80 oldStyle = old.getStyle(); 81 } 82 83 Typeface tf = Typeface.create(family, oldStyle); 84 int fake = oldStyle & ~tf.getStyle(); 85 86 if ((fake & Typeface.BOLD) != 0) { 87 paint.setFakeBoldText(true); 88 } 89 90 if ((fake & Typeface.ITALIC) != 0) { 91 paint.setTextSkewX(-0.25f); 92 } 93 94 paint.setTypeface(tf); 95 } 96} 97