| /* |
| * Copyright (C) 2016 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; |
| |
| import static android.app.ActivityManager.StackId.PINNED_STACK_ID; |
| import static android.util.TypedValue.COMPLEX_UNIT_DIP; |
| import static android.view.Display.DEFAULT_DISPLAY; |
| |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM; |
| |
| import android.animation.ValueAnimator; |
| import android.content.res.Resources; |
| import android.graphics.Point; |
| import android.graphics.PointF; |
| import android.graphics.Rect; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.DisplayMetrics; |
| import android.util.Log; |
| import android.util.Size; |
| import android.util.Slog; |
| import android.util.TypedValue; |
| import android.view.DisplayInfo; |
| import android.view.Gravity; |
| import android.view.IPinnedStackController; |
| import android.view.IPinnedStackListener; |
| |
| import com.android.internal.os.BackgroundThread; |
| import com.android.internal.policy.PipMotionHelper; |
| import com.android.internal.policy.PipSnapAlgorithm; |
| |
| import java.io.PrintWriter; |
| |
| /** |
| * Holds the common state of the pinned stack between the system and SystemUI. |
| */ |
| class PinnedStackController { |
| |
| private static final String TAG = TAG_WITH_CLASS_NAME ? "PinnedStackController" : TAG_WM; |
| |
| private final WindowManagerService mService; |
| private final DisplayContent mDisplayContent; |
| private final Handler mHandler = new Handler(); |
| |
| private IPinnedStackListener mPinnedStackListener; |
| private final PinnedStackListenerDeathHandler mPinnedStackListenerDeathHandler = |
| new PinnedStackListenerDeathHandler(); |
| |
| private final PinnedStackControllerCallback mCallbacks = new PinnedStackControllerCallback(); |
| private final PipSnapAlgorithm mSnapAlgorithm; |
| private final PipMotionHelper mMotionHelper; |
| |
| // States that affect how the PIP can be manipulated |
| private boolean mInInteractiveMode; |
| private boolean mIsImeShowing; |
| private int mImeHeight; |
| private ValueAnimator mBoundsAnimator = null; |
| |
| // Used to calculate stack bounds across rotations |
| private final DisplayInfo mDisplayInfo = new DisplayInfo(); |
| |
| // The size and position information that describes where the pinned stack will go by default. |
| private int mDefaultStackGravity; |
| private Size mDefaultStackSize; |
| private Point mScreenEdgeInsets; |
| |
| // Temp vars for calculation |
| private final DisplayMetrics mTmpMetrics = new DisplayMetrics(); |
| private final Rect mTmpInsets = new Rect(); |
| private final Rect mTmpRect = new Rect(); |
| |
| /** |
| * The callback object passed to listeners for them to notify the controller of state changes. |
| */ |
| private class PinnedStackControllerCallback extends IPinnedStackController.Stub { |
| |
| @Override |
| public void setInInteractiveMode(final boolean inInteractiveMode) { |
| mHandler.post(() -> { |
| // Cancel any existing animations on the PIP once the user starts dragging it |
| if (mBoundsAnimator != null && inInteractiveMode) { |
| mBoundsAnimator.cancel(); |
| } |
| mInInteractiveMode = inInteractiveMode; |
| }); |
| } |
| |
| @Override |
| public void setSnapToEdge(final boolean snapToEdge) { |
| mHandler.post(() -> { |
| mSnapAlgorithm.setSnapToEdge(snapToEdge); |
| }); |
| } |
| } |
| |
| /** |
| * Handler for the case where the listener dies. |
| */ |
| private class PinnedStackListenerDeathHandler implements IBinder.DeathRecipient { |
| |
| @Override |
| public void binderDied() { |
| // Clean up the state if the listener dies |
| mInInteractiveMode = false; |
| mPinnedStackListener = null; |
| } |
| } |
| |
| PinnedStackController(WindowManagerService service, DisplayContent displayContent) { |
| mService = service; |
| mDisplayContent = displayContent; |
| mSnapAlgorithm = new PipSnapAlgorithm(service.mContext); |
| mMotionHelper = new PipMotionHelper(BackgroundThread.getHandler()); |
| mDisplayInfo.copyFrom(mDisplayContent.getDisplayInfo()); |
| reloadResources(); |
| } |
| |
| void onConfigurationChanged() { |
| reloadResources(); |
| } |
| |
| /** |
| * Reloads all the resources for the current configuration. |
| */ |
| void reloadResources() { |
| final Resources res = mService.mContext.getResources(); |
| final Size defaultSizeDp = Size.parseSize(res.getString( |
| com.android.internal.R.string.config_defaultPictureInPictureSize)); |
| final Size screenEdgeInsetsDp = Size.parseSize(res.getString( |
| com.android.internal.R.string.config_defaultPictureInPictureScreenEdgeInsets)); |
| mDefaultStackGravity = res.getInteger( |
| com.android.internal.R.integer.config_defaultPictureInPictureGravity); |
| mDisplayContent.getDisplay().getRealMetrics(mTmpMetrics); |
| mDefaultStackSize = new Size(dpToPx(defaultSizeDp.getWidth(), mTmpMetrics), |
| dpToPx(defaultSizeDp.getHeight(), mTmpMetrics)); |
| mScreenEdgeInsets = new Point(dpToPx(screenEdgeInsetsDp.getWidth(), mTmpMetrics), |
| dpToPx(screenEdgeInsetsDp.getHeight(), mTmpMetrics)); |
| } |
| |
| /** |
| * Registers a pinned stack listener. |
| */ |
| void registerPinnedStackListener(IPinnedStackListener listener) { |
| try { |
| listener.asBinder().linkToDeath(mPinnedStackListenerDeathHandler, 0); |
| listener.onListenerRegistered(mCallbacks); |
| mPinnedStackListener = listener; |
| notifyBoundsChanged(mIsImeShowing); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Failed to register pinned stack listener", e); |
| } |
| } |
| |
| /** |
| * Returns the current bounds (or the default bounds if there are no current bounds) with the |
| * specified aspect ratio. |
| */ |
| Rect getAspectRatioBounds(Rect stackBounds, float aspectRatio) { |
| // Save the snap fraction, calculate the aspect ratio based on the current bounds |
| final float snapFraction = mSnapAlgorithm.getSnapFraction(stackBounds, |
| getMovementBounds(stackBounds)); |
| final float radius = PointF.length(stackBounds.width(), stackBounds.height()); |
| final int height = (int) Math.round(Math.sqrt((radius * radius) / |
| (aspectRatio * aspectRatio + 1))); |
| final int width = Math.round(height * aspectRatio); |
| final int left = (int) (stackBounds.centerX() - width / 2f); |
| final int top = (int) (stackBounds.centerY() - height / 2f); |
| stackBounds.set(left, top, left + width, top + height); |
| mSnapAlgorithm.applySnapFraction(stackBounds, getMovementBounds(stackBounds), snapFraction); |
| return stackBounds; |
| } |
| |
| /** |
| * @return the default bounds to show the PIP when there is no active PIP. |
| */ |
| Rect getDefaultBounds() { |
| final Rect insetBounds = new Rect(); |
| getInsetBounds(insetBounds); |
| |
| final Rect defaultBounds = new Rect(); |
| Gravity.apply(mDefaultStackGravity, mDefaultStackSize.getWidth(), |
| mDefaultStackSize.getHeight(), insetBounds, 0, 0, defaultBounds); |
| return defaultBounds; |
| } |
| |
| /** |
| * @return the movement bounds for the given {@param stackBounds} and the current state of the |
| * controller. |
| */ |
| Rect getMovementBounds(Rect stackBounds) { |
| return getMovementBounds(stackBounds, true /* adjustForIme */); |
| } |
| |
| /** |
| * @return the movement bounds for the given {@param stackBounds} and the current state of the |
| * controller. |
| */ |
| Rect getMovementBounds(Rect stackBounds, boolean adjustForIme) { |
| final Rect movementBounds = new Rect(); |
| getInsetBounds(movementBounds); |
| |
| // Adjust the right/bottom to ensure the stack bounds never goes offscreen |
| movementBounds.right = Math.max(movementBounds.left, movementBounds.right - |
| stackBounds.width()); |
| movementBounds.bottom = Math.max(movementBounds.top, movementBounds.bottom - |
| stackBounds.height()); |
| |
| // Apply the movement bounds adjustments based on the current state |
| if (adjustForIme) { |
| if (mIsImeShowing) { |
| movementBounds.bottom -= mImeHeight; |
| } |
| } |
| return movementBounds; |
| } |
| |
| /** |
| * @return the repositioned PIP bounds given it's pre-change bounds, and the new display info. |
| */ |
| Rect onDisplayChanged(Rect preChangeStackBounds, DisplayInfo displayInfo) { |
| final Rect postChangeStackBounds = new Rect(preChangeStackBounds); |
| if (!mDisplayInfo.equals(displayInfo)) { |
| // Calculate the snap fraction of the current stack along the old movement bounds, and |
| // then update the stack bounds to the same fraction along the rotated movement bounds. |
| final Rect preChangeMovementBounds = getMovementBounds(preChangeStackBounds); |
| final float snapFraction = mSnapAlgorithm.getSnapFraction(preChangeStackBounds, |
| preChangeMovementBounds); |
| mDisplayInfo.copyFrom(displayInfo); |
| |
| final Rect postChangeMovementBounds = getMovementBounds(preChangeStackBounds, |
| false /* adjustForIme */); |
| mSnapAlgorithm.applySnapFraction(postChangeStackBounds, postChangeMovementBounds, |
| snapFraction); |
| } |
| return postChangeStackBounds; |
| } |
| |
| /** |
| * Sets the Ime state and height. |
| */ |
| void setAdjustedForIme(boolean adjustedForIme, int imeHeight) { |
| // Return early if there is no state change |
| if (mIsImeShowing == adjustedForIme && mImeHeight == imeHeight) { |
| return; |
| } |
| |
| final Rect stackBounds = new Rect(); |
| mService.getStackBounds(PINNED_STACK_ID, stackBounds); |
| final Rect prevMovementBounds = getMovementBounds(stackBounds); |
| mIsImeShowing = adjustedForIme; |
| mImeHeight = imeHeight; |
| if (mInInteractiveMode) { |
| // If the user is currently interacting with the PIP and the ime state changes, then |
| // don't adjust the bounds and defer that to after the interaction |
| notifyBoundsChanged(adjustedForIme /* adjustedForIme */); |
| } else { |
| // Otherwise, we can move the PIP to a sane location to ensure that it does not block |
| // the user from interacting with the IME |
| final Rect movementBounds = getMovementBounds(stackBounds); |
| final Rect toBounds = new Rect(stackBounds); |
| if (adjustedForIme) { |
| // IME visible |
| toBounds.offset(0, Math.min(0, movementBounds.bottom - stackBounds.top)); |
| } else { |
| // IME hidden |
| if (stackBounds.top == prevMovementBounds.bottom) { |
| // If the PIP is resting on top of the IME, then adjust it with the hiding IME |
| toBounds.offsetTo(toBounds.left, movementBounds.bottom); |
| } |
| } |
| if (!toBounds.equals(stackBounds)) { |
| if (mBoundsAnimator != null) { |
| mBoundsAnimator.cancel(); |
| } |
| mBoundsAnimator = mMotionHelper.createAnimationToBounds(stackBounds, toBounds); |
| mBoundsAnimator.start(); |
| } |
| } |
| } |
| |
| /** |
| * Sends a broadcast that the PIP movement bounds have changed. |
| */ |
| private void notifyBoundsChanged(boolean adjustedForIme) { |
| if (mPinnedStackListener != null) { |
| try { |
| mPinnedStackListener.onBoundsChanged(adjustedForIme); |
| } catch (RemoteException e) { |
| Slog.e(TAG_WM, "Error delivering bounds changed event.", e); |
| } |
| } |
| } |
| |
| /** |
| * @return the bounds on the screen that the PIP can be visible in. |
| */ |
| private void getInsetBounds(Rect outRect) { |
| mService.mPolicy.getStableInsetsLw(mDisplayInfo.rotation, mDisplayInfo.logicalWidth, |
| mDisplayInfo.logicalHeight, mTmpInsets); |
| outRect.set(mTmpInsets.left + mScreenEdgeInsets.x, mTmpInsets.top + mScreenEdgeInsets.y, |
| mDisplayInfo.logicalWidth - mTmpInsets.right - mScreenEdgeInsets.x, |
| mDisplayInfo.logicalHeight - mTmpInsets.bottom - mScreenEdgeInsets.y); |
| } |
| |
| /** |
| * @return the pixels for a given dp value. |
| */ |
| private int dpToPx(float dpValue, DisplayMetrics dm) { |
| return (int) TypedValue.applyDimension(COMPLEX_UNIT_DIP, dpValue, dm); |
| } |
| |
| void dump(String prefix, PrintWriter pw) { |
| pw.println(prefix + "PinnedStackController"); |
| pw.print(prefix + " defaultBounds="); getDefaultBounds().printShortString(pw); |
| pw.println(); |
| mService.getStackBounds(PINNED_STACK_ID, mTmpRect); |
| pw.print(prefix + " movementBounds="); getMovementBounds(mTmpRect).printShortString(pw); |
| pw.println(); |
| pw.println(prefix + " mIsImeShowing=" + mIsImeShowing); |
| pw.println(prefix + " mInInteractiveMode=" + mInInteractiveMode); |
| } |
| } |