1 /*
2  * Copyright (C) 2013 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 
17 package com.android.inputmethod.compat;
18 
19 import android.view.View;
20 
21 import java.lang.reflect.Method;
22 
23 // TODO: Use {@link android.support.v4.view.ViewCompat} instead of this utility class.
24 // Currently {@link #getPaddingEnd(View)} and {@link #setPaddingRelative(View,int,int,int,int)}
25 // are missing from android-support-v4 static library in KitKat SDK.
26 public final class ViewCompatUtils {
27     // Note that View.getPaddingEnd(), View.setPaddingRelative(int,int,int,int) have been
28     // introduced in API level 17 (Build.VERSION_CODE.JELLY_BEAN_MR1).
29     private static final Method METHOD_getPaddingEnd = CompatUtils.getMethod(
30             View.class, "getPaddingEnd");
31     private static final Method METHOD_setPaddingRelative = CompatUtils.getMethod(
32             View.class, "setPaddingRelative",
33             int.class, int.class, int.class, int.class);
34     // Note that View.setTextAlignment(int) has been introduced in API level 17.
35     private static final Method METHOD_setTextAlignment = CompatUtils.getMethod(
36             View.class, "setTextAlignment", int.class);
37 
ViewCompatUtils()38     private ViewCompatUtils() {
39         // This utility class is not publicly instantiable.
40     }
41 
getPaddingEnd(final View view)42     public static int getPaddingEnd(final View view) {
43         if (METHOD_getPaddingEnd == null) {
44             return view.getPaddingRight();
45         }
46         return (Integer)CompatUtils.invoke(view, 0, METHOD_getPaddingEnd);
47     }
48 
setPaddingRelative(final View view, final int start, final int top, final int end, final int bottom)49     public static void setPaddingRelative(final View view, final int start, final int top,
50             final int end, final int bottom) {
51         if (METHOD_setPaddingRelative == null) {
52             view.setPadding(start, top, end, bottom);
53             return;
54         }
55         CompatUtils.invoke(view, null, METHOD_setPaddingRelative, start, top, end, bottom);
56     }
57 
58     // These TEXT_ALIGNMENT_* constants have been introduced in API 17.
59     public static final int TEXT_ALIGNMENT_INHERIT = 0;
60     public static final int TEXT_ALIGNMENT_GRAVITY = 1;
61     public static final int TEXT_ALIGNMENT_TEXT_START = 2;
62     public static final int TEXT_ALIGNMENT_TEXT_END = 3;
63     public static final int TEXT_ALIGNMENT_CENTER = 4;
64     public static final int TEXT_ALIGNMENT_VIEW_START = 5;
65     public static final int TEXT_ALIGNMENT_VIEW_END = 6;
66 
setTextAlignment(final View view, final int textAlignment)67     public static void setTextAlignment(final View view, final int textAlignment) {
68         CompatUtils.invoke(view, null, METHOD_setTextAlignment, textAlignment);
69     }
70 }
71