1 /* 2 * Copyright (C) 2015 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 17 package android.support.v7.widget; 18 19 import android.content.Context; 20 import android.content.res.ColorStateList; 21 import android.content.res.TypedArray; 22 import android.os.Build; 23 import android.support.v7.appcompat.R; 24 import android.support.v7.internal.text.AllCapsTransformationMethod; 25 import android.support.v7.internal.widget.ThemeUtils; 26 import android.util.AttributeSet; 27 import android.widget.TextView; 28 29 class AppCompatTextHelper { 30 31 private static final int[] VIEW_ATTRS = {android.R.attr.textAppearance}; 32 private static final int[] TEXT_APPEARANCE_ATTRS = {R.attr.textAllCaps}; 33 34 private final TextView mView; 35 AppCompatTextHelper(TextView view)36 AppCompatTextHelper(TextView view) { 37 mView = view; 38 } 39 loadFromAttributes(AttributeSet attrs, int defStyleAttr)40 void loadFromAttributes(AttributeSet attrs, int defStyleAttr) { 41 Context context = mView.getContext(); 42 43 // First read the TextAppearance style id 44 TypedArray a = context.obtainStyledAttributes(attrs, VIEW_ATTRS, defStyleAttr, 0); 45 final int ap = a.getResourceId(0, -1); 46 a.recycle(); 47 48 // Now check TextAppearance's textAllCaps value 49 if (ap != -1) { 50 TypedArray appearance = context.obtainStyledAttributes(ap, R.styleable.TextAppearance); 51 if (appearance.hasValue(R.styleable.TextAppearance_textAllCaps)) { 52 setAllCaps(appearance.getBoolean(R.styleable.TextAppearance_textAllCaps, false)); 53 } 54 appearance.recycle(); 55 } 56 57 // Now read the style's value 58 a = context.obtainStyledAttributes(attrs, TEXT_APPEARANCE_ATTRS, defStyleAttr, 0); 59 if (a.hasValue(0)) { 60 setAllCaps(a.getBoolean(0, false)); 61 } 62 a.recycle(); 63 64 final ColorStateList textColors = mView.getTextColors(); 65 if (textColors != null && !textColors.isStateful()) { 66 // If we have a ColorStateList which isn't stateful, create one which includes 67 // a disabled state 68 69 final int disabledTextColor; 70 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { 71 // Pre-Lollipop, we will use textColorSecondary with android:disabledAlpha 72 // applied 73 disabledTextColor = ThemeUtils.getDisabledThemeAttrColor(context, 74 android.R.attr.textColorSecondary); 75 } else { 76 // With certain styles on Lollipop, there is a StateListAnimator which sets 77 // an alpha on the whole view, so we don't need to apply disabledAlpha to 78 // textColorSecondary 79 disabledTextColor = ThemeUtils.getThemeAttrColor(context, 80 android.R.attr.textColorSecondary); 81 } 82 83 mView.setTextColor(ThemeUtils.createDisabledStateList( 84 textColors.getDefaultColor(), disabledTextColor)); 85 } 86 } 87 onSetTextAppearance(Context context, int resId)88 void onSetTextAppearance(Context context, int resId) { 89 TypedArray appearance = context.obtainStyledAttributes(resId, TEXT_APPEARANCE_ATTRS); 90 if (appearance.hasValue(0)) { 91 setAllCaps(appearance.getBoolean(0, false)); 92 } 93 appearance.recycle(); 94 } 95 setAllCaps(boolean allCaps)96 void setAllCaps(boolean allCaps) { 97 mView.setTransformationMethod(allCaps 98 ? new AllCapsTransformationMethod(mView.getContext()) 99 : null); 100 } 101 } 102