1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package androidx.appcompat.widget;
18
19import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
20
21import android.graphics.Rect;
22import android.os.Build;
23import android.util.Log;
24import android.view.View;
25
26import androidx.annotation.RestrictTo;
27import androidx.core.view.ViewCompat;
28
29import java.lang.reflect.InvocationTargetException;
30import java.lang.reflect.Method;
31
32/**
33 * @hide
34 */
35@RestrictTo(LIBRARY_GROUP)
36public class ViewUtils {
37    private static final String TAG = "ViewUtils";
38
39    private static Method sComputeFitSystemWindowsMethod;
40
41    static {
42        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
43            try {
44                sComputeFitSystemWindowsMethod = View.class.getDeclaredMethod(
45                        "computeFitSystemWindows", Rect.class, Rect.class);
46                if (!sComputeFitSystemWindowsMethod.isAccessible()) {
47                    sComputeFitSystemWindowsMethod.setAccessible(true);
48                }
49            } catch (NoSuchMethodException e) {
50                Log.d(TAG, "Could not find method computeFitSystemWindows. Oh well.");
51            }
52        }
53    }
54
55    private ViewUtils() {}
56
57    public static boolean isLayoutRtl(View view) {
58        return ViewCompat.getLayoutDirection(view) == ViewCompat.LAYOUT_DIRECTION_RTL;
59    }
60
61    /**
62     * Allow calling the hidden method {@code computeFitSystemWindows(Rect, Rect)} through
63     * reflection on {@code view}.
64     */
65    public static void computeFitSystemWindows(View view, Rect inoutInsets, Rect outLocalInsets) {
66        if (sComputeFitSystemWindowsMethod != null) {
67            try {
68                sComputeFitSystemWindowsMethod.invoke(view, inoutInsets, outLocalInsets);
69            } catch (Exception e) {
70                Log.d(TAG, "Could not invoke computeFitSystemWindows", e);
71            }
72        }
73    }
74
75    /**
76     * Allow calling the hidden method {@code makeOptionalFitsSystem()} through reflection on
77     * {@code view}.
78     */
79    public static void makeOptionalFitsSystemWindows(View view) {
80        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
81            try {
82                // We need to use getMethod() for makeOptionalFitsSystemWindows since both View
83                // and ViewGroup implement the method
84                Method method = view.getClass().getMethod("makeOptionalFitsSystemWindows");
85                if (!method.isAccessible()) {
86                    method.setAccessible(true);
87                }
88                method.invoke(view);
89            } catch (NoSuchMethodException e) {
90                Log.d(TAG, "Could not find method makeOptionalFitsSystemWindows. Oh well...");
91            } catch (InvocationTargetException e) {
92                Log.d(TAG, "Could not invoke makeOptionalFitsSystemWindows", e);
93            } catch (IllegalAccessException e) {
94                Log.d(TAG, "Could not invoke makeOptionalFitsSystemWindows", e);
95            }
96        }
97    }
98}
99