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[CleanUp][TextField] Split icon tinting logic to a helper class
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lib/java/com/google/android/material/textfield/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. | ||
| */ | ||
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|
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| package com.google.android.material.textfield; | ||
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| 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; | ||
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| class IconTintHelper { | ||
| private IconTintHelper() {} | ||
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| /** | ||
| * 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); | ||
| } | ||
| } | ||
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| if (iconView.getDrawable() != icon) { | ||
| iconView.setImageDrawable(icon); | ||
| } | ||
| } | ||
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| /** | ||
| * 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; | ||
| } | ||
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| int color = | ||
| colorStateList.getColorForState( | ||
| mergeIconState(textInputLayout, iconView), colorStateList.getDefaultColor()); | ||
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| icon = DrawableCompat.wrap(icon).mutate(); | ||
| DrawableCompat.setTintList(icon, ColorStateList.valueOf(color)); | ||
| iconView.setImageDrawable(icon); | ||
| } | ||
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| private static int[] mergeIconState( | ||
| @NonNull TextInputLayout textInputLayout, | ||
| @NonNull CheckableImageButton iconView) { | ||
| int[] textInputStates = textInputLayout.getDrawableState(); | ||
| int[] iconStates = iconView.getDrawableState(); | ||
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| int index = textInputStates.length; | ||
| int[] states = Arrays.copyOf(textInputStates, textInputStates.length + iconStates.length); | ||
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| System.arraycopy(iconStates, 0, states, index, iconStates.length); | ||
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| return states; | ||
| } | ||
| } |
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