Inline hippo's glcomponents

* Replace android support with androidx as well

app/src/main/java/com/hippo/glview/anim/Animation.java

@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2010 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 com.hippo.glview.anim;
+
+import android.os.SystemClock;
+import android.view.animation.Interpolator;
+
+import com.hippo.yorozuya.MathUtils;
+
+// Animation calculates a value according to the current input time.
+//
+// 1. First we need to use setDuration(int) to set the duration of the
+//    animation. The duration is in milliseconds.
+// 2. Then we should call start(). The actual start time is the first value
+//    passed to calculate(long).
+// 3. Each time we want to get an animation value, we call
+//    calculate(long currentTimeMillis) to ask the Animation to calculate it.
+//    The parameter passed to calculate(long) should be nonnegative.
+// 4. Use get() to get that value.
+//
+// In step 3, onCalculate(float progress) is called so subclasses can calculate
+// the value according to progress (progress is a value in [0,1]).
+//
+// Before onCalculate(float) is called, There is an optional interpolator which
+// can change the progress value. The interpolator can be set by
+// setInterpolator(Interpolator). If the interpolator is used, the value passed
+// to onCalculate may be (for example, the overshoot effect).
+//
+// The isActive() method returns true after the animation start() is called and
+// before calculate is passed a value which reaches the duration of the
+// animation.
+//
+// The start() method can be called again to restart the Animation.
+//
+abstract public class Animation {
+    private static final long ANIMATION_START = -1;
+    private static final long NO_ANIMATION = -2;
+
+    /**
+     * When the animation reaches the end and <code>repeatCount</code> is INFINITE
+     * or a positive value, the animation restarts from the beginning.
+     */
+    public static final int RESTART = 1;
+    /**
+     * When the animation reaches the end and <code>repeatCount</code> is INFINITE
+     * or a positive value, the animation reverses direction on every iteration.
+     */
+    public static final int REVERSE = 2;
+    /**
+     * This value used used with the {@link #setRepeatCount(int)} property to repeat
+     * the animation indefinitely.
+     */
+    public static final int INFINITE = -1;
+
+    private long mStartTime = NO_ANIMATION;
+    private long mDuration;
+    private Interpolator mInterpolator;
+    private int mRepeatCount;
+    private int mRepeatMode;
+
+    private int mRunnedCount;
+    private long mLastFrameTime;
+
+    public void setInterpolator(Interpolator interpolator) {
+        mInterpolator = interpolator;
+    }
+
+    public void setDuration(long duration) {
+        mDuration = duration;
+    }
+
+    public void setRepeatCount(int repeatCount) {
+        mRepeatCount = repeatCount;
+    }
+
+    public void setRepeatMode(int repeatMode) {
+        mRepeatMode = repeatMode;
+    }
+
+    public boolean isRunning() {
+        return mStartTime > 0 || mStartTime == ANIMATION_START;
+    }
+
+    public long getLastFrameTime() {
+        return mLastFrameTime;
+    }
+
+    public void start() {
+        if (mStartTime == NO_ANIMATION) {
+            mStartTime = ANIMATION_START;
+            mRunnedCount = 0;
+            mLastFrameTime = 0;
+        }
+    }
+
+    public void startAt(long time) {
+        start();
+        setStartTime(time);
+    }
+
+    public void startNow() {
+        start();
+        setStartTime(SystemClock.uptimeMillis());
+    }
+
+    public void setStartTime(long time) {
+        mStartTime = time;
+    }
+
+    public void cancel() {
+        mStartTime = NO_ANIMATION;
+    }
+
+    public void reset() {
+        mStartTime = ANIMATION_START;
+        mRunnedCount = 0;
+        mLastFrameTime = 0;
+    }
+
+    // TODO mRepeatMode
+    public boolean calculate(long currentTimeMillis) {
+        if (mStartTime == NO_ANIMATION) {
+            return false;
+        }
+        if (mStartTime == ANIMATION_START) {
+            mStartTime = currentTimeMillis;
+        }
+        mLastFrameTime = currentTimeMillis;
+
+        long elapse = currentTimeMillis - mStartTime;
+        float x = MathUtils.clamp(mDuration == 0.0f ? 1.0f : (float) elapse / mDuration, 0.0f, 1.0f); // Avoid NaN
+        Interpolator i = mInterpolator;
+        onCalculate(i != null ? i.getInterpolation(x) : x);
+
+        // It is ok to call cancel() in onCalculate()
+        if (mStartTime != NO_ANIMATION && elapse >= mDuration) {
+            mRunnedCount++;
+            if (mRunnedCount >= mRepeatCount && mRepeatCount != INFINITE) {
+                onFinish();
+                mStartTime = NO_ANIMATION;
+            } else {
+                mStartTime += elapse;
+            }
+        }
+
+        return mStartTime != NO_ANIMATION;
+    }
+
+    abstract protected void onCalculate(float progress);
+
+    protected void onFinish() {
+    }
+}