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
17package com.android.systemui.statusbar.phone;
18
19import android.app.ActivityManager;
20import android.content.Context;
21import android.content.res.Resources;
22import android.graphics.Canvas;
23import android.graphics.Color;
24import android.graphics.ColorFilter;
25import android.graphics.Paint;
26import android.graphics.PixelFormat;
27import android.graphics.PorterDuff;
28import android.graphics.PorterDuffColorFilter;
29import android.graphics.Rect;
30import android.graphics.PorterDuff.Mode;
31import android.graphics.drawable.Drawable;
32import android.os.SystemClock;
33import android.util.Log;
34import android.view.View;
35
36import com.android.settingslib.Utils;
37import com.android.systemui.Interpolators;
38import com.android.systemui.R;
39
40public class BarTransitions {
41    private static final boolean DEBUG = false;
42    private static final boolean DEBUG_COLORS = false;
43
44    public static final boolean HIGH_END = ActivityManager.isHighEndGfx();
45
46    public static final int MODE_OPAQUE = 0;
47    public static final int MODE_SEMI_TRANSPARENT = 1;
48    public static final int MODE_TRANSLUCENT = 2;
49    public static final int MODE_LIGHTS_OUT = 3;
50    public static final int MODE_TRANSPARENT = 4;
51    public static final int MODE_WARNING = 5;
52    public static final int MODE_LIGHTS_OUT_TRANSPARENT = 6;
53
54    public static final int LIGHTS_IN_DURATION = 250;
55    public static final int LIGHTS_OUT_DURATION = 750;
56    public static final int BACKGROUND_DURATION = 200;
57
58    private final String mTag;
59    private final View mView;
60    private final BarBackgroundDrawable mBarBackground;
61
62    private int mMode;
63    private boolean mAlwaysOpaque = false;
64
65    public BarTransitions(View view, int gradientResourceId) {
66        mTag = "BarTransitions." + view.getClass().getSimpleName();
67        mView = view;
68        mBarBackground = new BarBackgroundDrawable(mView.getContext(), gradientResourceId);
69        if (HIGH_END) {
70            mView.setBackground(mBarBackground);
71        }
72    }
73
74    public int getMode() {
75        return mMode;
76    }
77
78    /**
79     * @param alwaysOpaque if {@code true}, the bar's background will always be opaque, regardless
80     *         of what mode it is currently set to.
81     */
82    public void setAlwaysOpaque(boolean alwaysOpaque) {
83        mAlwaysOpaque = alwaysOpaque;
84    }
85
86    public boolean isAlwaysOpaque() {
87        // Low-end devices do not support translucent modes, fallback to opaque
88        return !HIGH_END || mAlwaysOpaque;
89    }
90
91    public void transitionTo(int mode, boolean animate) {
92        if (isAlwaysOpaque() && (mode == MODE_SEMI_TRANSPARENT || mode == MODE_TRANSLUCENT
93                || mode == MODE_TRANSPARENT)) {
94            mode = MODE_OPAQUE;
95        }
96        if (isAlwaysOpaque() && (mode == MODE_LIGHTS_OUT_TRANSPARENT)) {
97            mode = MODE_LIGHTS_OUT;
98        }
99        if (mMode == mode) return;
100        int oldMode = mMode;
101        mMode = mode;
102        if (DEBUG) Log.d(mTag, String.format("%s -> %s animate=%s",
103                modeToString(oldMode), modeToString(mode),  animate));
104        onTransition(oldMode, mMode, animate);
105    }
106
107    protected void onTransition(int oldMode, int newMode, boolean animate) {
108        if (HIGH_END) {
109            applyModeBackground(oldMode, newMode, animate);
110        }
111    }
112
113    protected void applyModeBackground(int oldMode, int newMode, boolean animate) {
114        if (DEBUG) Log.d(mTag, String.format("applyModeBackground oldMode=%s newMode=%s animate=%s",
115                modeToString(oldMode), modeToString(newMode), animate));
116        mBarBackground.applyModeBackground(oldMode, newMode, animate);
117    }
118
119    public static String modeToString(int mode) {
120        if (mode == MODE_OPAQUE) return "MODE_OPAQUE";
121        if (mode == MODE_SEMI_TRANSPARENT) return "MODE_SEMI_TRANSPARENT";
122        if (mode == MODE_TRANSLUCENT) return "MODE_TRANSLUCENT";
123        if (mode == MODE_LIGHTS_OUT) return "MODE_LIGHTS_OUT";
124        if (mode == MODE_TRANSPARENT) return "MODE_TRANSPARENT";
125        if (mode == MODE_WARNING) return "MODE_WARNING";
126        if (mode == MODE_LIGHTS_OUT_TRANSPARENT) return "MODE_LIGHTS_OUT_TRANSPARENT";
127        throw new IllegalArgumentException("Unknown mode " + mode);
128    }
129
130    public void finishAnimations() {
131        mBarBackground.finishAnimation();
132    }
133
134    protected boolean isLightsOut(int mode) {
135        return mode == MODE_LIGHTS_OUT || mode == MODE_LIGHTS_OUT_TRANSPARENT;
136    }
137
138    private static class BarBackgroundDrawable extends Drawable {
139        private final int mOpaque;
140        private final int mSemiTransparent;
141        private final int mTransparent;
142        private final int mWarning;
143        private final Drawable mGradient;
144
145        private int mMode = -1;
146        private boolean mAnimating;
147        private long mStartTime;
148        private long mEndTime;
149
150        private int mGradientAlpha;
151        private int mColor;
152        private PorterDuffColorFilter mTintFilter;
153        private Paint mPaint = new Paint();
154
155        private int mGradientAlphaStart;
156        private int mColorStart;
157
158
159        public BarBackgroundDrawable(Context context, int gradientResourceId) {
160            final Resources res = context.getResources();
161            if (DEBUG_COLORS) {
162                mOpaque = 0xff0000ff;
163                mSemiTransparent = 0x7f0000ff;
164                mTransparent = 0x2f0000ff;
165                mWarning = 0xffff0000;
166            } else {
167                mOpaque = context.getColor(R.color.system_bar_background_opaque);
168                mSemiTransparent = context.getColor(
169                        com.android.internal.R.color.system_bar_background_semi_transparent);
170                mTransparent = context.getColor(R.color.system_bar_background_transparent);
171                mWarning = Utils.getColorAttr(context, android.R.attr.colorError);
172            }
173            mGradient = context.getDrawable(gradientResourceId);
174        }
175
176        @Override
177        public void setAlpha(int alpha) {
178            // noop
179        }
180
181        @Override
182        public void setColorFilter(ColorFilter colorFilter) {
183            // noop
184        }
185
186        @Override
187        public void setTint(int color) {
188            if (mTintFilter == null) {
189                mTintFilter = new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_IN);
190            } else {
191                mTintFilter.setColor(color);
192            }
193            invalidateSelf();
194        }
195
196        @Override
197        public void setTintMode(Mode tintMode) {
198            if (mTintFilter == null) {
199                mTintFilter = new PorterDuffColorFilter(0, tintMode);
200            } else {
201                mTintFilter.setMode(tintMode);
202            }
203            invalidateSelf();
204        }
205
206        @Override
207        protected void onBoundsChange(Rect bounds) {
208            super.onBoundsChange(bounds);
209            mGradient.setBounds(bounds);
210        }
211
212        public void applyModeBackground(int oldMode, int newMode, boolean animate) {
213            if (mMode == newMode) return;
214            mMode = newMode;
215            mAnimating = animate;
216            if (animate) {
217                long now = SystemClock.elapsedRealtime();
218                mStartTime = now;
219                mEndTime = now + BACKGROUND_DURATION;
220                mGradientAlphaStart = mGradientAlpha;
221                mColorStart = mColor;
222            }
223            invalidateSelf();
224        }
225
226        @Override
227        public int getOpacity() {
228            return PixelFormat.TRANSLUCENT;
229        }
230
231        public void finishAnimation() {
232            if (mAnimating) {
233                mAnimating = false;
234                invalidateSelf();
235            }
236        }
237
238        @Override
239        public void draw(Canvas canvas) {
240            int targetGradientAlpha = 0, targetColor = 0;
241            if (mMode == MODE_WARNING) {
242                targetColor = mWarning;
243            } else if (mMode == MODE_TRANSLUCENT) {
244                targetColor = mSemiTransparent;
245            } else if (mMode == MODE_SEMI_TRANSPARENT) {
246                targetColor = mSemiTransparent;
247            } else if (mMode == MODE_TRANSPARENT || mMode == MODE_LIGHTS_OUT_TRANSPARENT) {
248                targetColor = mTransparent;
249            } else {
250                targetColor = mOpaque;
251            }
252
253            if (!mAnimating) {
254                mColor = targetColor;
255                mGradientAlpha = targetGradientAlpha;
256            } else {
257                final long now = SystemClock.elapsedRealtime();
258                if (now >= mEndTime) {
259                    mAnimating = false;
260                    mColor = targetColor;
261                    mGradientAlpha = targetGradientAlpha;
262                } else {
263                    final float t = (now - mStartTime) / (float)(mEndTime - mStartTime);
264                    final float v = Math.max(0, Math.min(
265                            Interpolators.LINEAR.getInterpolation(t), 1));
266                    mGradientAlpha = (int)(v * targetGradientAlpha + mGradientAlphaStart * (1 - v));
267                    mColor = Color.argb(
268                          (int)(v * Color.alpha(targetColor) + Color.alpha(mColorStart) * (1 - v)),
269                          (int)(v * Color.red(targetColor) + Color.red(mColorStart) * (1 - v)),
270                          (int)(v * Color.green(targetColor) + Color.green(mColorStart) * (1 - v)),
271                          (int)(v * Color.blue(targetColor) + Color.blue(mColorStart) * (1 - v)));
272                }
273            }
274            if (mGradientAlpha > 0) {
275                mGradient.setAlpha(mGradientAlpha);
276                mGradient.draw(canvas);
277            }
278            if (Color.alpha(mColor) > 0) {
279                mPaint.setColor(mColor);
280                if (mTintFilter != null) {
281                    mPaint.setColorFilter(mTintFilter);
282                }
283                canvas.drawPaint(mPaint);
284            }
285            if (mAnimating) {
286                invalidateSelf();  // keep going
287            }
288        }
289    }
290}
291