| /* |
| * Copyright (C) 2015 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 android.util.Slog; |
| import android.view.Display; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayDeque; |
| |
| import static android.app.ActivityManager.StackId.DOCKED_STACK_ID; |
| import static android.app.ActivityManager.StackId.PINNED_STACK_ID; |
| import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER; |
| import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_LAYERS; |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM; |
| import static com.android.server.wm.WindowManagerService.WINDOW_LAYER_MULTIPLIER; |
| |
| /** |
| * Controller for assigning layers to windows on the display. |
| * |
| * This class encapsulates general algorithm for assigning layers and special rules that we need to |
| * apply on top. The general algorithm goes through windows from bottom to the top and the higher |
| * the window is, the higher layer is assigned. The final layer is equal to base layer + |
| * adjustment from the order. This means that the window list is assumed to be ordered roughly by |
| * the base layer (there are exceptions, e.g. due to keyguard and wallpaper and they need to be |
| * handled with care, because they break the algorithm). |
| * |
| * On top of the general algorithm we add special rules, that govern such amazing things as: |
| * <li>IME (which has higher base layer, but will be positioned above application windows)</li> |
| * <li>docked/pinned windows (that need to be lifted above other application windows, including |
| * animations) |
| * <li>dock divider (which needs to live above applications, but below IME)</li> |
| * <li>replaced windows, which need to live above their normal level, because they anticipate |
| * an animation</li>. |
| */ |
| public class WindowLayersController { |
| private final WindowManagerService mService; |
| |
| private int mInputMethodAnimLayerAdjustment; |
| |
| public WindowLayersController(WindowManagerService service) { |
| mService = service; |
| } |
| |
| private int mHighestApplicationLayer = 0; |
| private ArrayDeque<WindowState> mPinnedWindows = new ArrayDeque<>(); |
| private ArrayDeque<WindowState> mDockedWindows = new ArrayDeque<>(); |
| private WindowState mDockDivider = null; |
| private ArrayDeque<WindowState> mReplacingWindows = new ArrayDeque<>(); |
| |
| final void assignLayersLocked(WindowList windows) { |
| if (DEBUG_LAYERS) Slog.v(TAG_WM, "Assigning layers based on windows=" + windows, |
| new RuntimeException("here").fillInStackTrace()); |
| |
| clear(); |
| int curBaseLayer = 0; |
| int curLayer = 0; |
| boolean anyLayerChanged = false; |
| for (int i = 0, windowCount = windows.size(); i < windowCount; i++) { |
| final WindowState w = windows.get(i); |
| boolean layerChanged = false; |
| |
| int oldLayer = w.mLayer; |
| if (w.mBaseLayer == curBaseLayer || w.mIsImWindow || (i > 0 && w.mIsWallpaper)) { |
| curLayer += WINDOW_LAYER_MULTIPLIER; |
| } else { |
| curBaseLayer = curLayer = w.mBaseLayer; |
| } |
| assignAnimLayer(w, curLayer); |
| |
| // TODO: Preserved old behavior of code here but not sure comparing |
| // oldLayer to mAnimLayer and mLayer makes sense...though the |
| // worst case would be unintentionalp layer reassignment. |
| if (w.mLayer != oldLayer || w.mWinAnimator.mAnimLayer != oldLayer) { |
| layerChanged = true; |
| anyLayerChanged = true; |
| } |
| |
| if (w.mAppToken != null) { |
| mHighestApplicationLayer = Math.max(mHighestApplicationLayer, |
| w.mWinAnimator.mAnimLayer); |
| } |
| collectSpecialWindows(w); |
| |
| if (layerChanged) { |
| w.scheduleAnimationIfDimming(); |
| } |
| } |
| |
| adjustSpecialWindows(); |
| |
| //TODO (multidisplay): Magnification is supported only for the default display. |
| if (mService.mAccessibilityController != null && anyLayerChanged |
| && windows.get(windows.size() - 1).getDisplayId() == Display.DEFAULT_DISPLAY) { |
| mService.mAccessibilityController.onWindowLayersChangedLocked(); |
| } |
| |
| if (DEBUG_LAYERS) logDebugLayers(windows); |
| } |
| |
| void setInputMethodAnimLayerAdjustment(int adj) { |
| if (DEBUG_LAYERS) Slog.v(TAG_WM, "Setting im layer adj to " + adj); |
| mInputMethodAnimLayerAdjustment = adj; |
| final WindowState imw = mService.mInputMethodWindow; |
| if (imw != null) { |
| imw.mWinAnimator.mAnimLayer = imw.mLayer + adj; |
| if (DEBUG_LAYERS) Slog.v(TAG_WM, "IM win " + imw |
| + " anim layer: " + imw.mWinAnimator.mAnimLayer); |
| for (int i = imw.mChildWindows.size() - 1; i >= 0; i--) { |
| final WindowState childWindow = imw.mChildWindows.get(i); |
| childWindow.mWinAnimator.mAnimLayer = childWindow.mLayer + adj; |
| if (DEBUG_LAYERS) Slog.v(TAG_WM, "IM win " + childWindow |
| + " anim layer: " + childWindow.mWinAnimator.mAnimLayer); |
| } |
| } |
| for (int i = mService.mInputMethodDialogs.size() - 1; i >= 0; i--) { |
| final WindowState dialog = mService.mInputMethodDialogs.get(i); |
| dialog.mWinAnimator.mAnimLayer = dialog.mLayer + adj; |
| if (DEBUG_LAYERS) Slog.v(TAG_WM, "IM win " + imw |
| + " anim layer: " + dialog.mWinAnimator.mAnimLayer); |
| } |
| } |
| |
| int getSpecialWindowAnimLayerAdjustment(WindowState win) { |
| if (win.mIsImWindow) { |
| return mInputMethodAnimLayerAdjustment; |
| } else if (win.mIsWallpaper) { |
| return mService.mWallpaperControllerLocked.getAnimLayerAdjustment(); |
| } |
| return 0; |
| } |
| |
| /** |
| * @return The layer used for dimming the apps when dismissing docked/fullscreen stack. Just |
| * above all application surfaces. |
| */ |
| int getResizeDimLayer() { |
| return mDockDivider.mLayer - 1; |
| } |
| |
| private void logDebugLayers(WindowList windows) { |
| for (int i = 0, n = windows.size(); i < n; i++) { |
| final WindowState w = windows.get(i); |
| final WindowStateAnimator winAnimator = w.mWinAnimator; |
| Slog.v(TAG_WM, "Assign layer " + w + ": " + "mBase=" + w.mBaseLayer |
| + " mLayer=" + w.mLayer + (w.mAppToken == null |
| ? "" : " mAppLayer=" + w.mAppToken.mAppAnimator.animLayerAdjustment) |
| + " =mAnimLayer=" + winAnimator.mAnimLayer); |
| } |
| } |
| |
| private void clear() { |
| mHighestApplicationLayer = 0; |
| mPinnedWindows.clear(); |
| mDockedWindows.clear(); |
| mReplacingWindows.clear(); |
| mDockDivider = null; |
| } |
| |
| private void collectSpecialWindows(WindowState w) { |
| if (w.mAttrs.type == TYPE_DOCK_DIVIDER) { |
| mDockDivider = w; |
| return; |
| } |
| if (w.mWillReplaceWindow) { |
| mReplacingWindows.add(w); |
| } |
| final TaskStack stack = w.getStack(); |
| if (stack == null) { |
| return; |
| } |
| if (stack.mStackId == PINNED_STACK_ID) { |
| mPinnedWindows.add(w); |
| } else if (stack.mStackId == DOCKED_STACK_ID) { |
| mDockedWindows.add(w); |
| } |
| } |
| |
| private void adjustSpecialWindows() { |
| int layer = mHighestApplicationLayer + WINDOW_LAYER_MULTIPLIER; |
| // For pinned and docked stack window, we want to make them above other windows also when |
| // these windows are animating. |
| while (!mDockedWindows.isEmpty()) { |
| layer = assignAndIncreaseLayerIfNeeded(mDockedWindows.remove(), layer); |
| } |
| |
| layer = assignAndIncreaseLayerIfNeeded(mDockDivider, layer); |
| |
| if (mDockDivider != null && mDockDivider.isVisibleLw() |
| && mService.mInputMethodWindow != null) { |
| layer = assignAndIncreaseLayerIfNeeded(mService.mInputMethodWindow, layer); |
| } |
| |
| // We know that we will be animating a relaunching window in the near future, which will |
| // receive a z-order increase. We want the replaced window to immediately receive the same |
| // treatment, e.g. to be above the dock divider. |
| while (!mReplacingWindows.isEmpty()) { |
| layer = assignAndIncreaseLayerIfNeeded(mReplacingWindows.remove(), layer); |
| } |
| |
| while (!mPinnedWindows.isEmpty()) { |
| layer = assignAndIncreaseLayerIfNeeded(mPinnedWindows.remove(), layer); |
| } |
| } |
| |
| private int assignAndIncreaseLayerIfNeeded(WindowState win, int layer) { |
| if (win != null) { |
| assignAnimLayer(win, layer); |
| // Make sure we leave space inbetween normal windows for dims and such. |
| layer += WINDOW_LAYER_MULTIPLIER; |
| } |
| return layer; |
| } |
| |
| private void assignAnimLayer(WindowState w, int layer) { |
| w.mLayer = layer; |
| w.mWinAnimator.mAnimLayer = w.mLayer + w.getAnimLayerAdjustment() + |
| getSpecialWindowAnimLayerAdjustment(w); |
| if (w.mAppToken != null && w.mAppToken.mAppAnimator.thumbnailForceAboveLayer > 0 |
| && w.mWinAnimator.mAnimLayer > w.mAppToken.mAppAnimator.thumbnailForceAboveLayer) { |
| w.mAppToken.mAppAnimator.thumbnailForceAboveLayer = w.mWinAnimator.mAnimLayer; |
| } |
| } |
| |
| void dump(PrintWriter pw, String s) { |
| if (mInputMethodAnimLayerAdjustment != 0 || |
| mService.mWallpaperControllerLocked.getAnimLayerAdjustment() != 0) { |
| pw.print(" mInputMethodAnimLayerAdjustment="); |
| pw.print(mInputMethodAnimLayerAdjustment); |
| pw.print(" mWallpaperAnimLayerAdjustment="); |
| pw.println(mService.mWallpaperControllerLocked.getAnimLayerAdjustment()); |
| } |
| } |
| } |