| /* |
| * Copyright (C) 2020 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.systemui.util; |
| |
| import android.content.res.ColorStateList; |
| import android.content.res.Resources; |
| import android.content.res.Resources.Theme; |
| import android.content.res.TypedArray; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.DrawableWrapper; |
| import android.graphics.drawable.InsetDrawable; |
| import android.util.AttributeSet; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| |
| import com.android.systemui.R; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| import java.io.IOException; |
| |
| /** |
| * An extension of {@link DrawableWrapper} that supports alpha and tint XML properties. |
| * |
| * {@link DrawableWrapper} supports setting these properties programmatically, but doesn't expose |
| * corresponding XML properties for some reason. This class allows to set these values in the XML, |
| * supporting theming. |
| * |
| * This class should only be used in XML. |
| * |
| * @attr ref android.R.styleable#DrawableWrapper_drawable |
| * @attr ref R.styleable#AlphaTintDrawableWrapper_tint |
| * @attr ref R.styleable#AlphaTintDrawableWrapper_alpha |
| */ |
| public class AlphaTintDrawableWrapper extends InsetDrawable { |
| private ColorStateList mTint; |
| private int[] mThemeAttrs; |
| |
| /** No-arg constructor used by drawable inflation. */ |
| public AlphaTintDrawableWrapper() { |
| super(null, 0); |
| } |
| |
| AlphaTintDrawableWrapper(Drawable drawable, int[] themeAttrs) { |
| super(drawable, 0); |
| mThemeAttrs = themeAttrs; |
| } |
| |
| @Override |
| public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser, |
| @NonNull AttributeSet attrs, @Nullable Theme theme) |
| throws XmlPullParserException, IOException { |
| final TypedArray a = obtainAttributes(r, theme, attrs, |
| R.styleable.AlphaTintDrawableWrapper); |
| |
| super.inflate(r, parser, attrs, theme); |
| |
| mThemeAttrs = a.extractThemeAttrs(); |
| updateStateFromTypedArray(a); |
| a.recycle(); |
| |
| applyTint(); |
| } |
| |
| @Override |
| public void applyTheme(Theme t) { |
| super.applyTheme(t); |
| |
| if (mThemeAttrs != null && t != null) { |
| final TypedArray a = t.resolveAttributes(mThemeAttrs, |
| R.styleable.AlphaTintDrawableWrapper); |
| updateStateFromTypedArray(a); |
| a.recycle(); |
| } |
| |
| // Ensure tint is reapplied after applying the theme to ensure this drawables' |
| // tint overrides the underlying drawables' tint. |
| applyTint(); |
| } |
| |
| @Override |
| public boolean canApplyTheme() { |
| return (mThemeAttrs != null && mThemeAttrs.length > 0) || super.canApplyTheme(); |
| } |
| |
| private void updateStateFromTypedArray(@NonNull TypedArray a) { |
| if (a.hasValue(R.styleable.AlphaTintDrawableWrapper_android_tint)) { |
| mTint = a.getColorStateList(R.styleable.AlphaTintDrawableWrapper_android_tint); |
| } |
| if (a.hasValue(R.styleable.AlphaTintDrawableWrapper_android_alpha)) { |
| float alpha = a.getFloat(R.styleable.AlphaTintDrawableWrapper_android_alpha, 1); |
| setAlpha(Math.round(alpha * 255)); |
| } |
| } |
| |
| @Override |
| public void setTintList(ColorStateList tint) { |
| super.setTintList(tint); |
| mTint = tint; |
| } |
| |
| private void applyTint() { |
| if (getDrawable() != null && mTint != null) { |
| getDrawable().mutate().setTintList(mTint); |
| } |
| } |
| |
| @Nullable |
| @Override |
| public ConstantState getConstantState() { |
| return new AlphaTintState(super.getConstantState(), mThemeAttrs, getAlpha(), mTint); |
| } |
| |
| static class AlphaTintState extends Drawable.ConstantState { |
| |
| private ConstantState mWrappedState; |
| private int[] mThemeAttrs; |
| private int mAlpha; |
| private ColorStateList mColorStateList; |
| |
| AlphaTintState( |
| ConstantState wrappedState, |
| int[] themeAttrs, |
| int alpha, |
| ColorStateList colorStateList |
| ) { |
| mWrappedState = wrappedState; |
| mThemeAttrs = themeAttrs; |
| mAlpha = alpha; |
| mColorStateList = colorStateList; |
| } |
| |
| @NonNull |
| @Override |
| public Drawable newDrawable() { |
| return newDrawable(null, null); |
| } |
| |
| @NonNull |
| @Override |
| public Drawable newDrawable(Resources res, Theme theme) { |
| DrawableWrapper wrapper = (DrawableWrapper) mWrappedState.newDrawable(res, theme); |
| AlphaTintDrawableWrapper alphaTintDrawableWrapper = |
| new AlphaTintDrawableWrapper(wrapper.getDrawable(), mThemeAttrs); |
| alphaTintDrawableWrapper.setTintList(mColorStateList); |
| alphaTintDrawableWrapper.setAlpha(mAlpha); |
| return alphaTintDrawableWrapper; |
| } |
| |
| @Override |
| public boolean canApplyTheme() { |
| return true; |
| } |
| |
| @Override |
| public int getChangingConfigurations() { |
| return mWrappedState.getChangingConfigurations(); |
| } |
| } |
| } |