| /* |
| * Copyright (C) 2018 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.server.wm.utils; |
| |
| import android.graphics.Rect; |
| import android.util.Size; |
| import android.view.DisplayCutout; |
| import android.view.Gravity; |
| |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** |
| * Wrapper for DisplayCutout that also tracks the display size and using this allows (re)calculating |
| * safe insets. |
| */ |
| public class WmDisplayCutout { |
| |
| public static final WmDisplayCutout NO_CUTOUT = new WmDisplayCutout(DisplayCutout.NO_CUTOUT, |
| null); |
| |
| private final DisplayCutout mInner; |
| private final Size mFrameSize; |
| |
| public WmDisplayCutout(DisplayCutout inner, Size frameSize) { |
| mInner = inner; |
| mFrameSize = frameSize; |
| } |
| |
| public static WmDisplayCutout computeSafeInsets(DisplayCutout inner, |
| int displayWidth, int displayHeight) { |
| if (inner == DisplayCutout.NO_CUTOUT || inner.isBoundsEmpty()) { |
| return NO_CUTOUT; |
| } |
| |
| final Size displaySize = new Size(displayWidth, displayHeight); |
| final Rect safeInsets = computeSafeInsets(displaySize, inner); |
| return new WmDisplayCutout(inner.replaceSafeInsets(safeInsets), displaySize); |
| } |
| |
| /** |
| * Insets the reference frame of the cutout in the given directions. |
| * |
| * @return a copy of this instance which has been inset |
| * @hide |
| */ |
| public WmDisplayCutout inset(int insetLeft, int insetTop, int insetRight, int insetBottom) { |
| DisplayCutout newInner = mInner.inset(insetLeft, insetTop, insetRight, insetBottom); |
| |
| if (mInner == newInner) { |
| return this; |
| } |
| |
| Size frame = mFrameSize == null ? null : new Size( |
| mFrameSize.getWidth() - insetLeft - insetRight, |
| mFrameSize.getHeight() - insetTop - insetBottom); |
| |
| return new WmDisplayCutout(newInner, frame); |
| } |
| |
| /** |
| * Recalculates the cutout relative to the given reference frame. |
| * |
| * The safe insets must already have been computed, e.g. with {@link #computeSafeInsets}. |
| * |
| * @return a copy of this instance with the safe insets recalculated |
| * @hide |
| */ |
| public WmDisplayCutout calculateRelativeTo(Rect frame) { |
| if (mFrameSize == null) { |
| return this; |
| } |
| final int insetRight = mFrameSize.getWidth() - frame.right; |
| final int insetBottom = mFrameSize.getHeight() - frame.bottom; |
| if (frame.left == 0 && frame.top == 0 && insetRight == 0 && insetBottom == 0) { |
| return this; |
| } |
| if (frame.left >= mInner.getSafeInsetLeft() |
| && frame.top >= mInner.getSafeInsetTop() |
| && insetRight >= mInner.getSafeInsetRight() |
| && insetBottom >= mInner.getSafeInsetBottom()) { |
| return NO_CUTOUT; |
| } |
| if (mInner.isEmpty()) { |
| return this; |
| } |
| return inset(frame.left, frame.top, insetRight, insetBottom); |
| } |
| |
| /** |
| * Calculates the safe insets relative to the given display size. |
| * |
| * @return a copy of this instance with the safe insets calculated |
| * @hide |
| */ |
| public WmDisplayCutout computeSafeInsets(int width, int height) { |
| return computeSafeInsets(mInner, width, height); |
| } |
| |
| private static Rect computeSafeInsets(Size displaySize, DisplayCutout cutout) { |
| if (displaySize.getWidth() < displaySize.getHeight()) { |
| final List<Rect> boundingRects = cutout.replaceSafeInsets( |
| new Rect(0, displaySize.getHeight() / 2, 0, displaySize.getHeight() / 2)) |
| .getBoundingRects(); |
| int topInset = findInsetForSide(displaySize, boundingRects, Gravity.TOP); |
| int bottomInset = findInsetForSide(displaySize, boundingRects, Gravity.BOTTOM); |
| return new Rect(0, topInset, 0, bottomInset); |
| } else if (displaySize.getWidth() > displaySize.getHeight()) { |
| final List<Rect> boundingRects = cutout.replaceSafeInsets( |
| new Rect(displaySize.getWidth() / 2, 0, displaySize.getWidth() / 2, 0)) |
| .getBoundingRects(); |
| int leftInset = findInsetForSide(displaySize, boundingRects, Gravity.LEFT); |
| int right = findInsetForSide(displaySize, boundingRects, Gravity.RIGHT); |
| return new Rect(leftInset, 0, right, 0); |
| } else { |
| throw new UnsupportedOperationException("not implemented: display=" + displaySize + |
| " cutout=" + cutout); |
| } |
| } |
| |
| private static int findInsetForSide(Size display, List<Rect> boundingRects, int gravity) { |
| int inset = 0; |
| final int size = boundingRects.size(); |
| for (int i = 0; i < size; i++) { |
| Rect boundingRect = boundingRects.get(i); |
| switch (gravity) { |
| case Gravity.TOP: |
| if (boundingRect.top == 0) { |
| inset = Math.max(inset, boundingRect.bottom); |
| } |
| break; |
| case Gravity.BOTTOM: |
| if (boundingRect.bottom == display.getHeight()) { |
| inset = Math.max(inset, display.getHeight() - boundingRect.top); |
| } |
| break; |
| case Gravity.LEFT: |
| if (boundingRect.left == 0) { |
| inset = Math.max(inset, boundingRect.right); |
| } |
| break; |
| case Gravity.RIGHT: |
| if (boundingRect.right == display.getWidth()) { |
| inset = Math.max(inset, display.getWidth() - boundingRect.left); |
| } |
| break; |
| default: |
| throw new IllegalArgumentException("unknown gravity: " + gravity); |
| } |
| } |
| return inset; |
| } |
| |
| public DisplayCutout getDisplayCutout() { |
| return mInner; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof WmDisplayCutout)) { |
| return false; |
| } |
| WmDisplayCutout that = (WmDisplayCutout) o; |
| return Objects.equals(mInner, that.mInner) && |
| Objects.equals(mFrameSize, that.mFrameSize); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(mInner, mFrameSize); |
| } |
| |
| @Override |
| public String toString() { |
| return "WmDisplayCutout{" + mInner + ", mFrameSize=" + mFrameSize + '}'; |
| } |
| } |