Winson Chung | 655332c | 2016-10-31 13:14:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.wm; |
| 18 | |
| 19 | import static android.app.ActivityManager.StackId.PINNED_STACK_ID; |
| 20 | import static android.util.TypedValue.COMPLEX_UNIT_DIP; |
| 21 | |
| 22 | import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| 23 | import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM; |
| 24 | |
| 25 | import android.animation.ValueAnimator; |
| 26 | import android.content.res.Resources; |
| 27 | import android.graphics.Point; |
| 28 | import android.graphics.Rect; |
| 29 | import android.os.Handler; |
| 30 | import android.os.IBinder; |
| 31 | import android.os.RemoteException; |
| 32 | import android.util.DisplayMetrics; |
| 33 | import android.util.Log; |
| 34 | import android.util.Size; |
| 35 | import android.util.Slog; |
| 36 | import android.util.TypedValue; |
| 37 | import android.view.Display; |
| 38 | import android.view.Gravity; |
| 39 | import android.view.IPinnedStackController; |
| 40 | import android.view.IPinnedStackListener; |
| 41 | |
| 42 | import com.android.internal.os.BackgroundThread; |
| 43 | import com.android.internal.policy.PipMotionHelper; |
| 44 | import com.android.internal.policy.PipSnapAlgorithm; |
| 45 | |
| 46 | import java.io.PrintWriter; |
| 47 | |
| 48 | /** |
| 49 | * Holds the common state of the pinned stack between the system and SystemUI. |
| 50 | */ |
| 51 | class PinnedStackController { |
| 52 | |
| 53 | private static final String TAG = TAG_WITH_CLASS_NAME ? "PinnedStackController" : TAG_WM; |
| 54 | |
| 55 | private final WindowManagerService mService; |
| 56 | private final DisplayContent mDisplayContent; |
| 57 | private final Handler mHandler = new Handler(); |
| 58 | |
| 59 | private IPinnedStackListener mPinnedStackListener; |
| 60 | private final PinnedStackListenerDeathHandler mPinnedStackListenerDeathHandler = |
| 61 | new PinnedStackListenerDeathHandler(); |
| 62 | |
| 63 | private final PinnedStackControllerCallback mCallbacks = new PinnedStackControllerCallback(); |
| 64 | private final PipSnapAlgorithm mSnapAlgorithm; |
| 65 | private final PipMotionHelper mMotionHelper; |
| 66 | |
| 67 | // States that affect how the PIP can be manipulated |
| 68 | private boolean mInInteractiveMode; |
| 69 | private boolean mIsImeShowing; |
| 70 | private int mImeHeight; |
| 71 | private final Rect mPreImeShowingBounds = new Rect(); |
| 72 | private ValueAnimator mBoundsAnimator = null; |
| 73 | |
| 74 | // The size and position information that describes where the pinned stack will go by default. |
| 75 | private int mDefaultStackGravity; |
| 76 | private Size mDefaultStackSize; |
| 77 | private Point mScreenEdgeInsets; |
| 78 | |
| 79 | // Temp vars for calculation |
| 80 | private final DisplayMetrics mTmpMetrics = new DisplayMetrics(); |
| 81 | private final Rect mTmpInsets = new Rect(); |
| 82 | |
| 83 | /** |
| 84 | * The callback object passed to listeners for them to notify the controller of state changes. |
| 85 | */ |
| 86 | private class PinnedStackControllerCallback extends IPinnedStackController.Stub { |
| 87 | |
| 88 | @Override |
| 89 | public void setInInteractiveMode(final boolean inInteractiveMode) { |
| 90 | mHandler.post(() -> { |
| 91 | // Cancel any existing animations on the PIP once the user starts dragging it |
| 92 | if (mBoundsAnimator != null && inInteractiveMode) { |
| 93 | mBoundsAnimator.cancel(); |
| 94 | } |
| 95 | mInInteractiveMode = inInteractiveMode; |
| 96 | mPreImeShowingBounds.setEmpty(); |
| 97 | }); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Handler for the case where the listener dies. |
| 103 | */ |
| 104 | private class PinnedStackListenerDeathHandler implements IBinder.DeathRecipient { |
| 105 | |
| 106 | @Override |
| 107 | public void binderDied() { |
| 108 | // Clean up the state if the listener dies |
| 109 | mInInteractiveMode = false; |
| 110 | mPinnedStackListener = null; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | PinnedStackController(WindowManagerService service, DisplayContent displayContent) { |
| 115 | mService = service; |
| 116 | mDisplayContent = displayContent; |
| 117 | mSnapAlgorithm = new PipSnapAlgorithm(service.mContext); |
| 118 | mMotionHelper = new PipMotionHelper(BackgroundThread.getHandler()); |
| 119 | reloadResources(); |
| 120 | } |
| 121 | |
| 122 | void onConfigurationChanged() { |
| 123 | reloadResources(); |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Reloads all the resources for the current configuration. |
| 128 | */ |
| 129 | void reloadResources() { |
| 130 | final Resources res = mService.mContext.getResources(); |
| 131 | final Size defaultSizeDp = Size.parseSize(res.getString( |
| 132 | com.android.internal.R.string.config_defaultPictureInPictureSize)); |
| 133 | final Size screenEdgeInsetsDp = Size.parseSize(res.getString( |
| 134 | com.android.internal.R.string.config_defaultPictureInPictureScreenEdgeInsets)); |
| 135 | mDefaultStackGravity = res.getInteger( |
| 136 | com.android.internal.R.integer.config_defaultPictureInPictureGravity); |
| 137 | mDisplayContent.getDisplay().getRealMetrics(mTmpMetrics); |
| 138 | mDefaultStackSize = new Size(dpToPx(defaultSizeDp.getWidth(), mTmpMetrics), |
| 139 | dpToPx(defaultSizeDp.getHeight(), mTmpMetrics)); |
| 140 | mScreenEdgeInsets = new Point(dpToPx(screenEdgeInsetsDp.getWidth(), mTmpMetrics), |
| 141 | dpToPx(screenEdgeInsetsDp.getHeight(), mTmpMetrics)); |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Registers a pinned stack listener. |
| 146 | */ |
| 147 | void registerPinnedStackListener(IPinnedStackListener listener) { |
| 148 | try { |
| 149 | listener.asBinder().linkToDeath(mPinnedStackListenerDeathHandler, 0); |
| 150 | listener.onListenerRegistered(mCallbacks); |
| 151 | mPinnedStackListener = listener; |
| 152 | notifyBoundsChanged(mIsImeShowing); |
| 153 | } catch (RemoteException e) { |
| 154 | Log.e(TAG, "Failed to register pinned stack listener", e); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * @return the default bounds to show the PIP when there is no active PIP. |
| 160 | */ |
| 161 | Rect getDefaultBounds() { |
| 162 | final Display display = mDisplayContent.getDisplay(); |
| 163 | final Rect insetBounds = new Rect(); |
| 164 | final Point displaySize = new Point(); |
| 165 | display.getRealSize(displaySize); |
| 166 | mService.getStableInsetsLocked(mDisplayContent.getDisplayId(), mTmpInsets); |
| 167 | getInsetBounds(displaySize, mTmpInsets, insetBounds); |
| 168 | |
| 169 | final Rect defaultBounds = new Rect(); |
| 170 | Gravity.apply(mDefaultStackGravity, mDefaultStackSize.getWidth(), |
| 171 | mDefaultStackSize.getHeight(), insetBounds, 0, 0, defaultBounds); |
| 172 | return defaultBounds; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * @return the movement bounds for the given {@param stackBounds} and the current state of the |
| 177 | * controller. |
| 178 | */ |
| 179 | Rect getMovementBounds(Rect stackBounds) { |
| 180 | final Display display = mDisplayContent.getDisplay(); |
| 181 | final Rect movementBounds = new Rect(); |
| 182 | final Point displaySize = new Point(); |
| 183 | display.getRealSize(displaySize); |
| 184 | mService.getStableInsetsLocked(mDisplayContent.getDisplayId(), mTmpInsets); |
| 185 | getInsetBounds(displaySize, mTmpInsets, movementBounds); |
| 186 | |
| 187 | // Adjust the right/bottom to ensure the stack bounds never goes offscreen |
| 188 | movementBounds.right = Math.max(movementBounds.left, movementBounds.right - |
| 189 | stackBounds.width()); |
| 190 | movementBounds.bottom = Math.max(movementBounds.top, movementBounds.bottom - |
| 191 | stackBounds.height()); |
| 192 | |
| 193 | // Adjust the top if the ime is open |
| 194 | if (mIsImeShowing) { |
| 195 | movementBounds.bottom -= mImeHeight; |
| 196 | } |
| 197 | |
| 198 | return movementBounds; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * @return the PIP bounds given it's bounds pre-rotation, and post-rotation (with as applied |
| 203 | * by the display content, which currently transposes the dimensions but keeps each stack in |
| 204 | * the same physical space on the device). |
| 205 | */ |
| 206 | Rect getPostRotationBounds(Rect preRotationStackBounds, Rect postRotationStackBounds) { |
| 207 | // Keep the pinned stack in the same aspect ratio as in the old orientation, but |
| 208 | // move it into the position in the rotated space, and snap to the closest space |
| 209 | // in the new orientation. |
| 210 | final Rect movementBounds = getMovementBounds(preRotationStackBounds); |
| 211 | final int stackWidth = preRotationStackBounds.width(); |
| 212 | final int stackHeight = preRotationStackBounds.height(); |
| 213 | final int left = postRotationStackBounds.centerX() - (stackWidth / 2); |
| 214 | final int top = postRotationStackBounds.centerY() - (stackHeight / 2); |
| 215 | final Rect postRotBounds = new Rect(left, top, left + stackWidth, top + stackHeight); |
| 216 | return mSnapAlgorithm.findClosestSnapBounds(movementBounds, postRotBounds); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Sets the Ime state and height. |
| 221 | */ |
| 222 | void setAdjustedForIme(boolean adjustedForIme, int imeHeight) { |
| 223 | // Return early if there is no state change |
| 224 | if (mIsImeShowing == adjustedForIme && mImeHeight == imeHeight) { |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | final Rect stackBounds = new Rect(); |
| 229 | mService.getStackBounds(PINNED_STACK_ID, stackBounds); |
| 230 | final Rect prevMovementBounds = getMovementBounds(stackBounds); |
| 231 | final boolean wasAdjustedForIme = mIsImeShowing; |
| 232 | mIsImeShowing = adjustedForIme; |
| 233 | mImeHeight = imeHeight; |
| 234 | if (mInInteractiveMode) { |
| 235 | // If the user is currently interacting with the PIP and the ime state changes, then |
| 236 | // don't adjust the bounds and defer that to after the interaction |
| 237 | notifyBoundsChanged(adjustedForIme /* adjustedForIme */); |
| 238 | } else { |
| 239 | // Otherwise, we can move the PIP to a sane location to ensure that it does not block |
| 240 | // the user from interacting with the IME |
| 241 | Rect toBounds; |
| 242 | if (!wasAdjustedForIme && adjustedForIme) { |
| 243 | // If we are showing the IME, then store the previous bounds |
| 244 | mPreImeShowingBounds.set(stackBounds); |
| 245 | toBounds = adjustBoundsInMovementBounds(stackBounds); |
| 246 | } else if (wasAdjustedForIme && !adjustedForIme) { |
| 247 | if (!mPreImeShowingBounds.isEmpty()) { |
| 248 | // If we are hiding the IME and the user is not interacting with the PIP, restore |
| 249 | // the previous bounds |
| 250 | toBounds = mPreImeShowingBounds; |
| 251 | } else { |
| 252 | if (stackBounds.top == prevMovementBounds.bottom) { |
| 253 | // If the PIP is resting on top of the IME, then adjust it with the hiding |
| 254 | // of the IME |
| 255 | final Rect movementBounds = getMovementBounds(stackBounds); |
| 256 | toBounds = new Rect(stackBounds); |
| 257 | toBounds.offsetTo(toBounds.left, movementBounds.bottom); |
| 258 | } else { |
| 259 | // Otherwise, leave the PIP in place |
| 260 | toBounds = stackBounds; |
| 261 | } |
| 262 | } |
| 263 | } else { |
| 264 | // Otherwise, the IME bounds have changed so we need to adjust the PIP bounds also |
| 265 | toBounds = adjustBoundsInMovementBounds(stackBounds); |
| 266 | } |
| 267 | if (!toBounds.equals(stackBounds)) { |
| 268 | if (mBoundsAnimator != null) { |
| 269 | mBoundsAnimator.cancel(); |
| 270 | } |
| 271 | mBoundsAnimator = mMotionHelper.createAnimationToBounds(stackBounds, toBounds); |
| 272 | mBoundsAnimator.start(); |
| 273 | } |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * @return the adjusted {@param stackBounds} such that they are in the movement bounds. |
| 279 | */ |
| 280 | private Rect adjustBoundsInMovementBounds(Rect stackBounds) { |
| 281 | final Rect movementBounds = getMovementBounds(stackBounds); |
| 282 | final Rect adjustedBounds = new Rect(stackBounds); |
| 283 | adjustedBounds.offset(0, Math.min(0, movementBounds.bottom - stackBounds.top)); |
| 284 | return adjustedBounds; |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Sends a broadcast that the PIP movement bounds have changed. |
| 289 | */ |
| 290 | private void notifyBoundsChanged(boolean adjustedForIme) { |
| 291 | if (mPinnedStackListener != null) { |
| 292 | try { |
| 293 | mPinnedStackListener.onBoundsChanged(adjustedForIme); |
| 294 | } catch (RemoteException e) { |
| 295 | Slog.e(TAG_WM, "Error delivering bounds changed event.", e); |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * @return the bounds on the screen that the PIP can be visible in. |
| 302 | */ |
| 303 | private void getInsetBounds(Point displaySize, Rect insets, Rect outRect) { |
| 304 | outRect.set(insets.left + mScreenEdgeInsets.x, insets.top + mScreenEdgeInsets.y, |
| 305 | displaySize.x - insets.right - mScreenEdgeInsets.x, |
| 306 | displaySize.y - insets.bottom - mScreenEdgeInsets.y); |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * @return the pixels for a given dp value. |
| 311 | */ |
| 312 | private int dpToPx(float dpValue, DisplayMetrics dm) { |
| 313 | return (int) TypedValue.applyDimension(COMPLEX_UNIT_DIP, dpValue, dm); |
| 314 | } |
| 315 | |
| 316 | void dump(String prefix, PrintWriter pw) { |
| 317 | pw.println(prefix + "PinnedStackController"); |
| 318 | pw.println(prefix + " mIsImeShowing=" + mIsImeShowing); |
| 319 | pw.println(prefix + " mInInteractiveMode=" + mInInteractiveMode); |
| 320 | } |
| 321 | } |