/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.settings.widget;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.content.res.ColorStateList;
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import android.content.res.Resources;
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import android.content.res.Resources.Theme;
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import android.content.res.TypedArray;
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import android.graphics.drawable.DrawableWrapper;
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import android.util.AttributeSet;
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import android.util.Log;
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import com.android.settings.R;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import java.io.IOException;
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/**
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* A Drawable that tints a contained Drawable, overriding the existing tint specified in the
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* underlying drawable. This class should only be used in XML.
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*
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* @attr ref android.R.styleable#DrawableWrapper_drawable
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* @attr ref R.styleable#TintDrawable_tint
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*/
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public class TintDrawable extends DrawableWrapper {
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private ColorStateList mTint;
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private int[] mThemeAttrs;
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/** No-arg constructor used by drawable inflation. */
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public TintDrawable() {
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super(null);
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}
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@Override
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public void inflate(@NonNull Resources r, @NonNull XmlPullParser parser,
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@NonNull AttributeSet attrs, @Nullable Theme theme)
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throws XmlPullParserException, IOException {
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final TypedArray a = obtainAttributes(r, theme, attrs, R.styleable.TintDrawable);
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super.inflate(r, parser, attrs, theme);
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mThemeAttrs = a.extractThemeAttrs();
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updateStateFromTypedArray(a);
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a.recycle();
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applyTint();
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}
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@Override
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public void applyTheme(Theme t) {
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super.applyTheme(t);
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if (mThemeAttrs != null) {
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final TypedArray a = t.resolveAttributes(mThemeAttrs, R.styleable.TintDrawable);
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updateStateFromTypedArray(a);
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a.recycle();
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}
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// Ensure tint is reapplied after applying the theme to ensure this drawables'
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// tint overrides the underlying drawables' tint.
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applyTint();
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}
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@Override
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public boolean canApplyTheme() {
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return (mThemeAttrs != null && mThemeAttrs.length > 0) || super.canApplyTheme();
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}
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private void updateStateFromTypedArray(@NonNull TypedArray a) {
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if (a.hasValue(R.styleable.TintDrawable_android_drawable)) {
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setDrawable(a.getDrawable(R.styleable.TintDrawable_android_drawable));
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}
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if (a.hasValue(R.styleable.TintDrawable_android_tint)) {
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mTint = a.getColorStateList(R.styleable.TintDrawable_android_tint);
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}
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}
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private void applyTint() {
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if (getDrawable() != null && mTint != null) {
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getDrawable().mutate().setTintList(mTint);
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}
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}
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}
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