/
IconTintHelper.java
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/
IconTintHelper.java
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/*
* Copyright (C) 2022 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.google.android.material.textfield;
import android.content.res.ColorStateList;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import androidx.annotation.NonNull;
import androidx.core.graphics.drawable.DrawableCompat;
import com.google.android.material.internal.CheckableImageButton;
import java.util.Arrays;
class IconTintHelper {
private IconTintHelper() {}
/**
* Applies the given icon tint according to the merged view state of the host text input layout
* and the icon view.
*/
static void applyIconTint(
@NonNull TextInputLayout textInputLayout,
@NonNull CheckableImageButton iconView,
ColorStateList iconTintList,
PorterDuff.Mode iconTintMode) {
Drawable icon = iconView.getDrawable();
if (icon != null) {
icon = DrawableCompat.wrap(icon).mutate();
if (iconTintList != null && iconTintList.isStateful()) {
// Make sure the right color for the current state is applied.
int color =
iconTintList.getColorForState(
mergeIconState(textInputLayout, iconView), iconTintList.getDefaultColor());
DrawableCompat.setTintList(icon, ColorStateList.valueOf(color));
} else {
DrawableCompat.setTintList(icon, iconTintList);
}
if (iconTintMode != null) {
DrawableCompat.setTintMode(icon, iconTintMode);
}
}
if (iconView.getDrawable() != icon) {
iconView.setImageDrawable(icon);
}
}
/**
* Refresh the icon tint according to the new drawable state.
*/
static void refreshIconDrawableState(
@NonNull TextInputLayout textInputLayout,
@NonNull CheckableImageButton iconView,
ColorStateList colorStateList) {
Drawable icon = iconView.getDrawable();
if (iconView.getDrawable() == null || colorStateList == null || !colorStateList.isStateful()) {
return;
}
int color =
colorStateList.getColorForState(
mergeIconState(textInputLayout, iconView), colorStateList.getDefaultColor());
icon = DrawableCompat.wrap(icon).mutate();
DrawableCompat.setTintList(icon, ColorStateList.valueOf(color));
iconView.setImageDrawable(icon);
}
private static int[] mergeIconState(
@NonNull TextInputLayout textInputLayout,
@NonNull CheckableImageButton iconView) {
int[] textInputStates = textInputLayout.getDrawableState();
int[] iconStates = iconView.getDrawableState();
int index = textInputStates.length;
int[] states = Arrays.copyOf(textInputStates, textInputStates.length + iconStates.length);
System.arraycopy(iconStates, 0, states, index, iconStates.length);
return states;
}
}