1 files changed, 208 insertions, 0 deletions
diff --git a/src/com/android/launcher3/popup/PopupItemView.java b/src/com/android/launcher3/popup/PopupItemView.java
new file mode 100644
index 000000000..25d496a4b
--- /dev/null
+++ b/src/com/android/launcher3/popup/PopupItemView.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2017 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.android.launcher3.popup;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ValueAnimator;
+import android.content.Context;
+import android.graphics.Point;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.LogAccelerateInterpolator;
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.util.PillRevealOutlineProvider;
+import com.android.launcher3.util.PillWidthRevealOutlineProvider;
+
+/**
+ * An abstract {@link FrameLayout} that supports animating an item's content
+ * (e.g. icon and text) separate from the item's background.
+ */
+public abstract class PopupItemView extends FrameLayout
+        implements ValueAnimator.AnimatorUpdateListener {
+
+    protected static final Point sTempPoint = new Point();
+
+    private final Rect mPillRect;
+    private float mOpenAnimationProgress;
+
+    protected View mIconView;
+
+    public PopupItemView(Context context) {
+        this(context, null, 0);
+    }
+
+    public PopupItemView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public PopupItemView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+
+        mPillRect = new Rect();
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mIconView = findViewById(R.id.popup_item_icon);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        mPillRect.set(0, 0, getMeasuredWidth(), getMeasuredHeight());
+    }
+
+    public boolean willDrawIcon() {
+        return true;
+    }
+
+    /**
+     * Creates an animator to play when the shortcut container is being opened.
+     */
+    public Animator createOpenAnimation(boolean isContainerAboveIcon, boolean pivotLeft) {
+        Point center = getIconCenter();
+        ValueAnimator openAnimator =  new ZoomRevealOutlineProvider(center.x, center.y,
+                mPillRect, this, mIconView, isContainerAboveIcon, pivotLeft)
+                        .createRevealAnimator(this, false);
+        mOpenAnimationProgress = 0f;
+        openAnimator.addUpdateListener(this);
+        return openAnimator;
+    }
+
+    @Override
+    public void onAnimationUpdate(ValueAnimator valueAnimator) {
+        mOpenAnimationProgress = valueAnimator.getAnimatedFraction();
+    }
+
+    public boolean isOpenOrOpening() {
+        return mOpenAnimationProgress > 0;
+    }
+
+    /**
+     * Creates an animator to play when the shortcut container is being closed.
+     */
+    public Animator createCloseAnimation(boolean isContainerAboveIcon, boolean pivotLeft,
+            long duration) {
+        Point center = getIconCenter();
+        ValueAnimator closeAnimator = new ZoomRevealOutlineProvider(center.x, center.y,
+                mPillRect, this, mIconView, isContainerAboveIcon, pivotLeft)
+                        .createRevealAnimator(this, true);
+        // Scale down the duration and interpolator according to the progress
+        // that the open animation was at when the close started.
+        closeAnimator.setDuration((long) (duration * mOpenAnimationProgress));
+        closeAnimator.setInterpolator(new CloseInterpolator(mOpenAnimationProgress));
+        closeAnimator.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mOpenAnimationProgress = 0;
+            }
+        });
+        return closeAnimator;
+    }
+
+    /**
+     * Creates an animator which clips the container to form a circle around the icon.
+     */
+    public Animator collapseToIcon() {
+        int halfHeight = getMeasuredHeight() / 2;
+        int iconCenterX = getIconCenter().x;
+        return new PillWidthRevealOutlineProvider(mPillRect,
+                iconCenterX - halfHeight, iconCenterX + halfHeight)
+                        .createRevealAnimator(this, true);
+    }
+
+    /**
+     * Returns the position of the center of the icon relative to the container.
+     */
+    public Point getIconCenter() {
+        sTempPoint.y = sTempPoint.x = getMeasuredHeight() / 2;
+        if (Utilities.isRtl(getResources())) {
+            sTempPoint.x = getMeasuredWidth() - sTempPoint.x;
+        }
+        return sTempPoint;
+    }
+
+    /**
+     * Extension of {@link PillRevealOutlineProvider} which scales the icon based on the height.
+     */
+    private static class ZoomRevealOutlineProvider extends PillRevealOutlineProvider {
+
+        private final View mTranslateView;
+        private final View mZoomView;
+
+        private final float mFullHeight;
+        private final float mTranslateYMultiplier;
+
+        private final boolean mPivotLeft;
+        private final float mTranslateX;
+
+        public ZoomRevealOutlineProvider(int x, int y, Rect pillRect,
+                View translateView, View zoomView, boolean isContainerAboveIcon, boolean pivotLeft) {
+            super(x, y, pillRect);
+            mTranslateView = translateView;
+            mZoomView = zoomView;
+            mFullHeight = pillRect.height();
+
+            mTranslateYMultiplier = isContainerAboveIcon ? 0.5f : -0.5f;
+
+            mPivotLeft = pivotLeft;
+            mTranslateX = pivotLeft ? pillRect.height() / 2 : pillRect.right - pillRect.height() / 2;
+        }
+
+        @Override
+        public void setProgress(float progress) {
+            super.setProgress(progress);
+
+            mZoomView.setScaleX(progress);
+            mZoomView.setScaleY(progress);
+
+            float height = mOutline.height();
+            mTranslateView.setTranslationY(mTranslateYMultiplier * (mFullHeight - height));
+
+            float pivotX = mPivotLeft ? (mOutline.left + height / 2) : (mOutline.right - height / 2);
+            mTranslateView.setTranslationX(mTranslateX - pivotX);
+        }
+    }
+
+    /**
+     * An interpolator that reverses the current open animation progress.
+     */
+    private static class CloseInterpolator extends LogAccelerateInterpolator {
+        private float mStartProgress;
+        private float mRemainingProgress;
+
+        /**
+         * @param openAnimationProgress The progress that the open interpolator ended at.
+         */
+        public CloseInterpolator(float openAnimationProgress) {
+            super(100, 0);
+            mStartProgress = 1f - openAnimationProgress;
+            mRemainingProgress = openAnimationProgress;
+        }
+
+        @Override
+        public float getInterpolation(float v) {
+            return mStartProgress + super.getInterpolation(v) * mRemainingProgress;
+        }
+    }
+}