ViewUtils.java
/*
* Copyright (C) 2014 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 androidx.appcompat.widget;
import static androidx.annotation.RestrictTo.Scope.LIBRARY;
import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP_PREFIX;
import android.annotation.SuppressLint;
import android.graphics.Insets;
import android.graphics.Rect;
import android.os.Build;
import android.util.Log;
import android.view.View;
import android.view.WindowInsets;
import androidx.annotation.ChecksSdkIntAtLeast;
import androidx.annotation.DoNotInline;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.annotation.RestrictTo;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
*/
@RestrictTo(LIBRARY_GROUP_PREFIX)
public class ViewUtils {
private static final String TAG = "ViewUtils";
private static boolean sInitComputeFitSystemWindowsMethod;
private static Method sComputeFitSystemWindowsMethod;
/**
*/
@RestrictTo(LIBRARY)
@ChecksSdkIntAtLeast(api = 27)
static final boolean SDK_LEVEL_SUPPORTS_AUTOSIZE = Build.VERSION.SDK_INT >= 27;
private ViewUtils() {}
public static boolean isLayoutRtl(View view) {
return view.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
}
/**
* Allow calling the hidden method {@code computeFitSystemWindows(Rect, Rect)} through
* reflection on {@code view}.
*/
public static void computeFitSystemWindows(@NonNull View view, @NonNull Rect inoutInsets,
@NonNull Rect outLocalInsets) {
if (Build.VERSION.SDK_INT >= 29) {
Api29Impl.computeFitSystemWindows(view, inoutInsets, outLocalInsets);
} else {
if (!sInitComputeFitSystemWindowsMethod) {
sInitComputeFitSystemWindowsMethod = true;
try {
sComputeFitSystemWindowsMethod = View.class.getDeclaredMethod(
"computeFitSystemWindows", Rect.class, Rect.class);
if (!sComputeFitSystemWindowsMethod.isAccessible()) {
sComputeFitSystemWindowsMethod.setAccessible(true);
}
} catch (NoSuchMethodException e) {
Log.d(TAG, "Could not find method computeFitSystemWindows. Oh well.");
}
}
if (sComputeFitSystemWindowsMethod != null) {
try {
sComputeFitSystemWindowsMethod.invoke(view, inoutInsets, outLocalInsets);
} catch (Exception e) {
Log.d(TAG, "Could not invoke computeFitSystemWindows", e);
}
}
}
}
/**
* Allow calling the hidden method {@code makeOptionalFitsSystem()} through reflection on
* {@code view}.
*/
@SuppressLint("BanUncheckedReflection")
public static void makeOptionalFitsSystemWindows(View view) {
try {
// We need to use getMethod() for makeOptionalFitsSystemWindows since both View
// and ViewGroup implement the method
Method method = view.getClass().getMethod("makeOptionalFitsSystemWindows");
if (!method.isAccessible()) {
method.setAccessible(true);
}
method.invoke(view);
} catch (NoSuchMethodException e) {
Log.d(TAG, "Could not find method makeOptionalFitsSystemWindows. Oh well...");
} catch (InvocationTargetException e) {
Log.d(TAG, "Could not invoke makeOptionalFitsSystemWindows", e);
} catch (IllegalAccessException e) {
Log.d(TAG, "Could not invoke makeOptionalFitsSystemWindows", e);
}
}
@RequiresApi(29)
static class Api29Impl {
private Api29Impl() {
// This class is not instantiable.
}
@DoNotInline
static void computeFitSystemWindows(@NonNull View view, @NonNull Rect inoutInsets,
@NonNull Rect outLocalInsets) {
WindowInsets in =
new WindowInsets.Builder()
.setSystemWindowInsets(Insets.of(inoutInsets))
.build();
WindowInsets innerInsets = view.computeSystemWindowInsets(in, outLocalInsets);
Insets systemWindowInsets = innerInsets.getSystemWindowInsets();
inoutInsets.set(systemWindowInsets.left, systemWindowInsets.top,
systemWindowInsets.right, systemWindowInsets.bottom);
}
}
}