1/*
2 * Copyright 2017 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.slice.widget;
18
19import android.content.Context;
20import android.content.res.ColorStateList;
21import android.content.res.TypedArray;
22import android.graphics.Bitmap;
23import android.graphics.Bitmap.Config;
24import android.graphics.Canvas;
25import android.graphics.Color;
26import android.graphics.Paint;
27import android.graphics.PorterDuff.Mode;
28import android.graphics.PorterDuffXfermode;
29import android.graphics.Rect;
30import android.graphics.drawable.BitmapDrawable;
31import android.graphics.drawable.Drawable;
32import android.text.format.DateUtils;
33import android.view.Gravity;
34import android.view.ViewGroup;
35import android.widget.FrameLayout;
36import android.widget.ImageView;
37
38import androidx.annotation.AttrRes;
39import androidx.annotation.ColorInt;
40import androidx.annotation.NonNull;
41import androidx.annotation.RestrictTo;
42import androidx.core.content.ContextCompat;
43import androidx.core.graphics.drawable.IconCompat;
44
45import java.util.Calendar;
46
47/**
48 * A bunch of utilities for slice UI.
49 *
50 * @hide
51 */
52@RestrictTo(RestrictTo.Scope.LIBRARY)
53public class SliceViewUtil {
54
55    /**
56     */
57    @ColorInt
58    public static int getColorAccent(@NonNull Context context) {
59        return getColorAttr(context, android.R.attr.colorAccent);
60    }
61
62    /**
63     */
64    @ColorInt
65    public static int getColorError(@NonNull Context context) {
66        return getColorAttr(context, android.R.attr.colorError);
67    }
68
69    /**
70     */
71    @ColorInt
72    public static int getDefaultColor(@NonNull Context context, int resId) {
73        final ColorStateList list = ContextCompat.getColorStateList(context, resId);
74        return list.getDefaultColor();
75    }
76
77    /**
78     */
79    @ColorInt
80    public static int getDisabled(@NonNull Context context, int inputColor) {
81        return applyAlphaAttr(context, android.R.attr.disabledAlpha, inputColor);
82    }
83
84    /**
85     */
86    @ColorInt
87    public static int applyAlphaAttr(@NonNull Context context, @AttrRes int attr, int inputColor) {
88        TypedArray ta = context.obtainStyledAttributes(new int[] {
89                attr
90        });
91        float alpha = ta.getFloat(0, 0);
92        ta.recycle();
93        return applyAlpha(alpha, inputColor);
94    }
95
96    /**
97     */
98    @ColorInt
99    public static int applyAlpha(float alpha, int inputColor) {
100        alpha *= Color.alpha(inputColor);
101        return Color.argb((int) (alpha), Color.red(inputColor), Color.green(inputColor),
102                Color.blue(inputColor));
103    }
104
105    /**
106     */
107    @ColorInt
108    public static int getColorAttr(@NonNull Context context, @AttrRes int attr) {
109        TypedArray ta = context.obtainStyledAttributes(new int[] {
110                attr
111        });
112        @ColorInt int colorAccent = ta.getColor(0, 0);
113        ta.recycle();
114        return colorAccent;
115    }
116
117    /**
118     */
119    public static int getThemeAttr(@NonNull Context context, @AttrRes int attr) {
120        TypedArray ta = context.obtainStyledAttributes(new int[] {
121                attr
122        });
123        int theme = ta.getResourceId(0, 0);
124        ta.recycle();
125        return theme;
126    }
127
128    /**
129     */
130    public static Drawable getDrawable(@NonNull Context context, @AttrRes int attr) {
131        TypedArray ta = context.obtainStyledAttributes(new int[] {
132                attr
133        });
134        Drawable drawable = ta.getDrawable(0);
135        ta.recycle();
136        return drawable;
137    }
138
139    /**
140     */
141    public static IconCompat createIconFromDrawable(Drawable d) {
142        if (d instanceof BitmapDrawable) {
143            return IconCompat.createWithBitmap(((BitmapDrawable) d).getBitmap());
144        }
145        Bitmap b = Bitmap.createBitmap(d.getIntrinsicWidth(), d.getIntrinsicHeight(),
146                Bitmap.Config.ARGB_8888);
147        Canvas canvas = new Canvas(b);
148        d.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
149        d.draw(canvas);
150        return IconCompat.createWithBitmap(b);
151    }
152
153    /**
154     */
155    public static void createCircledIcon(@NonNull Context context, int iconSizePx,
156            IconCompat icon, boolean isLarge, ViewGroup parent) {
157        ImageView v = new ImageView(context);
158        v.setImageDrawable(icon.loadDrawable(context));
159        v.setScaleType(isLarge ? ImageView.ScaleType.CENTER_CROP
160                : ImageView.ScaleType.CENTER_INSIDE);
161        parent.addView(v);
162        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) v.getLayoutParams();
163        if (isLarge) {
164            // XXX better way to convert from icon -> bitmap or crop an icon (?)
165            Bitmap iconBm = Bitmap.createBitmap(iconSizePx, iconSizePx, Config.ARGB_8888);
166            Canvas iconCanvas = new Canvas(iconBm);
167            v.layout(0, 0, iconSizePx, iconSizePx);
168            v.draw(iconCanvas);
169            v.setImageBitmap(getCircularBitmap(iconBm));
170        } else {
171            v.setColorFilter(Color.WHITE);
172        }
173        lp.width = iconSizePx;
174        lp.height = iconSizePx;
175        lp.gravity = Gravity.CENTER;
176    }
177
178    /**
179     */
180    public static @NonNull Bitmap getCircularBitmap(Bitmap bitmap) {
181        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
182                bitmap.getHeight(), Config.ARGB_8888);
183        Canvas canvas = new Canvas(output);
184        final Paint paint = new Paint();
185        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
186        paint.setAntiAlias(true);
187        canvas.drawARGB(0, 0, 0, 0);
188        canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
189                bitmap.getWidth() / 2, paint);
190        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
191        canvas.drawBitmap(bitmap, rect, rect, paint);
192        return output;
193    }
194
195    /**
196     */
197    public static CharSequence getRelativeTimeString(long time) {
198        return DateUtils.getRelativeTimeSpanString(time, Calendar.getInstance().getTimeInMillis(),
199                DateUtils.MINUTE_IN_MILLIS, DateUtils.FORMAT_ABBREV_RELATIVE);
200    }
201
202    private SliceViewUtil() {
203    }
204}
205