| /* |
| * Copyright 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 android.view; |
| |
| import static android.view.Surface.ROTATION_0; |
| import static android.view.Surface.ROTATION_180; |
| import static android.view.Surface.ROTATION_270; |
| import static android.view.Surface.ROTATION_90; |
| |
| import android.annotation.NonNull; |
| import android.graphics.Point; |
| import android.graphics.Rect; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Represents a part of the display that is not functional for displaying content. |
| * |
| * <p>{@code DisplayCutout} is immutable. |
| * |
| * @hide will become API |
| */ |
| public final class DisplayCutout { |
| |
| private static final Rect ZERO_RECT = new Rect(0, 0, 0, 0); |
| private static final ArrayList<Point> EMPTY_LIST = new ArrayList<>(); |
| |
| /** |
| * An instance where {@link #hasCutout()} returns {@code false}. |
| * |
| * @hide |
| */ |
| public static final DisplayCutout NO_CUTOUT = |
| new DisplayCutout(ZERO_RECT, ZERO_RECT, EMPTY_LIST); |
| |
| private final Rect mSafeInsets; |
| private final Rect mBoundingRect; |
| private final List<Point> mBoundingPolygon; |
| |
| /** |
| * Creates a DisplayCutout instance. |
| * |
| * NOTE: the Rects passed into this instance are not copied and MUST remain unchanged. |
| * |
| * @hide |
| */ |
| @VisibleForTesting |
| public DisplayCutout(Rect safeInsets, Rect boundingRect, List<Point> boundingPolygon) { |
| mSafeInsets = safeInsets != null ? safeInsets : ZERO_RECT; |
| mBoundingRect = boundingRect != null ? boundingRect : ZERO_RECT; |
| mBoundingPolygon = boundingPolygon != null ? boundingPolygon : EMPTY_LIST; |
| } |
| |
| /** |
| * Returns whether there is a cutout. |
| * |
| * If false, the safe insets will all return zero, and the bounding box or polygon will be |
| * empty or outside the content view. |
| * |
| * @return {@code true} if there is a cutout, {@code false} otherwise |
| */ |
| public boolean hasCutout() { |
| return !mSafeInsets.equals(ZERO_RECT); |
| } |
| |
| /** Returns the inset from the top which avoids the display cutout. */ |
| public int getSafeInsetTop() { |
| return mSafeInsets.top; |
| } |
| |
| /** Returns the inset from the bottom which avoids the display cutout. */ |
| public int getSafeInsetBottom() { |
| return mSafeInsets.bottom; |
| } |
| |
| /** Returns the inset from the left which avoids the display cutout. */ |
| public int getSafeInsetLeft() { |
| return mSafeInsets.left; |
| } |
| |
| /** Returns the inset from the right which avoids the display cutout. */ |
| public int getSafeInsetRight() { |
| return mSafeInsets.right; |
| } |
| |
| /** |
| * Obtains the safe insets in a rect. |
| * |
| * @param out a rect which is set to the safe insets. |
| * @hide |
| */ |
| public void getSafeInsets(@NonNull Rect out) { |
| out.set(mSafeInsets); |
| } |
| |
| /** |
| * Obtains the bounding rect of the cutout. |
| * |
| * @param outRect is filled with the bounding rect of the cutout. Coordinates are relative |
| * to the top-left corner of the content view. |
| */ |
| public void getBoundingRect(@NonNull Rect outRect) { |
| outRect.set(mBoundingRect); |
| } |
| |
| /** |
| * Obtains the bounding polygon of the cutout. |
| * |
| * @param outPolygon is filled with a list of points representing the corners of a convex |
| * polygon which covers the cutout. Coordinates are relative to the |
| * top-left corner of the content view. |
| */ |
| public void getBoundingPolygon(List<Point> outPolygon) { |
| outPolygon.clear(); |
| for (int i = 0; i < mBoundingPolygon.size(); i++) { |
| outPolygon.add(new Point(mBoundingPolygon.get(i))); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = mSafeInsets.hashCode(); |
| result = result * 31 + mBoundingRect.hashCode(); |
| result = result * 31 + mBoundingPolygon.hashCode(); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o == this) { |
| return true; |
| } |
| if (o instanceof DisplayCutout) { |
| DisplayCutout c = (DisplayCutout) o; |
| return mSafeInsets.equals(c.mSafeInsets) |
| && mBoundingRect.equals(c.mBoundingRect) |
| && mBoundingPolygon.equals(c.mBoundingPolygon); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return "DisplayCutout{insets=" + mSafeInsets |
| + " bounding=" + mBoundingRect |
| + "}"; |
| } |
| |
| /** |
| * Insets the reference frame of the cutout in the given directions. |
| * |
| * @return a copy of this instance which has been inset |
| * @hide |
| */ |
| public DisplayCutout inset(int insetLeft, int insetTop, int insetRight, int insetBottom) { |
| if (mBoundingRect.isEmpty() |
| || insetLeft == 0 && insetTop == 0 && insetRight == 0 && insetBottom == 0) { |
| return this; |
| } |
| |
| Rect safeInsets = new Rect(mSafeInsets); |
| Rect boundingRect = new Rect(mBoundingRect); |
| ArrayList<Point> boundingPolygon = new ArrayList<>(); |
| getBoundingPolygon(boundingPolygon); |
| |
| // Note: it's not really well defined what happens when the inset is negative, because we |
| // don't know if the safe inset needs to expand in general. |
| if (insetTop > 0 || safeInsets.top > 0) { |
| safeInsets.top = atLeastZero(safeInsets.top - insetTop); |
| } |
| if (insetBottom > 0 || safeInsets.bottom > 0) { |
| safeInsets.bottom = atLeastZero(safeInsets.bottom - insetBottom); |
| } |
| if (insetLeft > 0 || safeInsets.left > 0) { |
| safeInsets.left = atLeastZero(safeInsets.left - insetLeft); |
| } |
| if (insetRight > 0 || safeInsets.right > 0) { |
| safeInsets.right = atLeastZero(safeInsets.right - insetRight); |
| } |
| |
| boundingRect.offset(-insetLeft, -insetTop); |
| offset(boundingPolygon, -insetLeft, -insetTop); |
| |
| return new DisplayCutout(safeInsets, boundingRect, boundingPolygon); |
| } |
| |
| /** |
| * Calculates the safe insets relative to the given reference frame. |
| * |
| * @return a copy of this instance with the safe insets calculated |
| * @hide |
| */ |
| public DisplayCutout calculateRelativeTo(Rect frame) { |
| if (mBoundingRect.isEmpty() || !Rect.intersects(frame, mBoundingRect)) { |
| return NO_CUTOUT; |
| } |
| |
| Rect boundingRect = new Rect(mBoundingRect); |
| ArrayList<Point> boundingPolygon = new ArrayList<>(); |
| getBoundingPolygon(boundingPolygon); |
| |
| return DisplayCutout.calculateRelativeTo(frame, boundingRect, boundingPolygon); |
| } |
| |
| private static DisplayCutout calculateRelativeTo(Rect frame, Rect boundingRect, |
| ArrayList<Point> boundingPolygon) { |
| Rect safeRect = new Rect(); |
| int bestArea = 0; |
| int bestVariant = 0; |
| for (int variant = ROTATION_0; variant <= ROTATION_270; variant++) { |
| int area = calculateInsetVariantArea(frame, boundingRect, variant, safeRect); |
| if (bestArea < area) { |
| bestArea = area; |
| bestVariant = variant; |
| } |
| } |
| calculateInsetVariantArea(frame, boundingRect, bestVariant, safeRect); |
| if (safeRect.isEmpty()) { |
| // The entire frame overlaps with the cutout. |
| safeRect.set(0, frame.height(), 0, 0); |
| } else { |
| // Convert safeRect to insets relative to frame. We're reusing the rect here to avoid |
| // an allocation. |
| safeRect.set( |
| Math.max(0, safeRect.left - frame.left), |
| Math.max(0, safeRect.top - frame.top), |
| Math.max(0, frame.right - safeRect.right), |
| Math.max(0, frame.bottom - safeRect.bottom)); |
| } |
| |
| boundingRect.offset(-frame.left, -frame.top); |
| offset(boundingPolygon, -frame.left, -frame.top); |
| |
| return new DisplayCutout(safeRect, boundingRect, boundingPolygon); |
| } |
| |
| private static int calculateInsetVariantArea(Rect frame, Rect boundingRect, int variant, |
| Rect outSafeRect) { |
| switch (variant) { |
| case ROTATION_0: |
| outSafeRect.set(frame.left, frame.top, frame.right, boundingRect.top); |
| break; |
| case ROTATION_90: |
| outSafeRect.set(frame.left, frame.top, boundingRect.left, frame.bottom); |
| break; |
| case ROTATION_180: |
| outSafeRect.set(frame.left, boundingRect.bottom, frame.right, frame.bottom); |
| break; |
| case ROTATION_270: |
| outSafeRect.set(boundingRect.right, frame.top, frame.right, frame.bottom); |
| break; |
| } |
| |
| return outSafeRect.isEmpty() ? 0 : outSafeRect.width() * outSafeRect.height(); |
| } |
| |
| private static int atLeastZero(int value) { |
| return value < 0 ? 0 : value; |
| } |
| |
| private static void offset(ArrayList<Point> points, int dx, int dy) { |
| for (int i = 0; i < points.size(); i++) { |
| points.get(i).offset(dx, dy); |
| } |
| } |
| |
| /** |
| * Creates an instance from a bounding polygon. |
| * |
| * @hide |
| */ |
| public static DisplayCutout fromBoundingPolygon(List<Point> points) { |
| Rect boundingRect = new Rect(Integer.MAX_VALUE, Integer.MAX_VALUE, |
| Integer.MIN_VALUE, Integer.MIN_VALUE); |
| ArrayList<Point> boundingPolygon = new ArrayList<>(); |
| |
| for (int i = 0; i < points.size(); i++) { |
| Point point = points.get(i); |
| boundingRect.left = Math.min(boundingRect.left, point.x); |
| boundingRect.right = Math.max(boundingRect.right, point.x); |
| boundingRect.top = Math.min(boundingRect.top, point.y); |
| boundingRect.bottom = Math.max(boundingRect.bottom, point.y); |
| boundingPolygon.add(new Point(point)); |
| } |
| |
| return new DisplayCutout(ZERO_RECT, boundingRect, boundingPolygon); |
| } |
| |
| /** |
| * Helper class for passing {@link DisplayCutout} through binder. |
| * |
| * Needed, because {@code readFromParcel} cannot be used with immutable classes. |
| * |
| * @hide |
| */ |
| public static final class ParcelableWrapper implements Parcelable { |
| |
| private DisplayCutout mInner; |
| |
| public ParcelableWrapper() { |
| this(NO_CUTOUT); |
| } |
| |
| public ParcelableWrapper(DisplayCutout cutout) { |
| mInner = cutout; |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel out, int flags) { |
| if (mInner == NO_CUTOUT) { |
| out.writeInt(0); |
| } else { |
| out.writeInt(1); |
| out.writeTypedObject(mInner.mSafeInsets, flags); |
| out.writeTypedObject(mInner.mBoundingRect, flags); |
| out.writeTypedList(mInner.mBoundingPolygon, flags); |
| } |
| } |
| |
| /** |
| * Similar to {@link Creator#createFromParcel(Parcel)}, but reads into an existing |
| * instance. |
| * |
| * Needed for AIDL out parameters. |
| */ |
| public void readFromParcel(Parcel in) { |
| mInner = readCutout(in); |
| } |
| |
| public static final Creator<ParcelableWrapper> CREATOR = new Creator<ParcelableWrapper>() { |
| @Override |
| public ParcelableWrapper createFromParcel(Parcel in) { |
| return new ParcelableWrapper(readCutout(in)); |
| } |
| |
| @Override |
| public ParcelableWrapper[] newArray(int size) { |
| return new ParcelableWrapper[size]; |
| } |
| }; |
| |
| private static DisplayCutout readCutout(Parcel in) { |
| if (in.readInt() == 0) { |
| return NO_CUTOUT; |
| } |
| |
| ArrayList<Point> boundingPolygon = new ArrayList<>(); |
| |
| Rect safeInsets = in.readTypedObject(Rect.CREATOR); |
| Rect boundingRect = in.readTypedObject(Rect.CREATOR); |
| in.readTypedList(boundingPolygon, Point.CREATOR); |
| |
| return new DisplayCutout(safeInsets, boundingRect, boundingPolygon); |
| } |
| |
| public DisplayCutout get() { |
| return mInner; |
| } |
| |
| public void set(ParcelableWrapper cutout) { |
| mInner = cutout.get(); |
| } |
| |
| public void set(DisplayCutout cutout) { |
| mInner = cutout; |
| } |
| |
| @Override |
| public int hashCode() { |
| return mInner.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return o instanceof ParcelableWrapper |
| && mInner.equals(((ParcelableWrapper) o).mInner); |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(mInner); |
| } |
| } |
| } |