Refactor for multi-display support.

Split WindowManagerImpl into two parts, the WindowManager
interface implementation remains where it is but the global
communications with the window manager are now handled by
the WindowManagerGlobal class.  This change greatly simplifies
the challenge of having separate WindowManager instances
for each Context.

Removed WindowManagerImpl.getDefault().  This represents the
bulk of this change.  Most of the usages of this method were
either to perform global functions (now handled by WindowManagerGlobal)
or to obtain the default display (now handled by DisplayManager).

Explicitly associate each new window with a display and make
the Display object available to the View hierarchy.

Add stubs for some new display manager API features.

Start to split apart the concepts of display id and layer stack.
since they operate at different layers of abstraction.
While it's true that each logical display uniquely corresponds to a
surface flinger layer stack, it is not necessarily the case that
they must use the same ids.  Added Display.getLayerStack()
and started using it in places where it was relatively easy to do.

Change-Id: I29ed909114dec86807c4d3a5059c3fa0358bea61

1 files changed, 516 insertions, 0 deletions

diff --git a/core/java/android/view/WindowManagerGlobal.java b/core/java/android/view/WindowManagerGlobal.java
new file mode 100644
index 000000000000..7855763c910c
--- /dev/null
+++ b/core/java/android/view/WindowManagerGlobal.java
@@ -0,0 +1,516 @@
+/*
+ * Copyright (C) 2012 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 android.animation.ValueAnimator;
+import android.app.ActivityManager;
+import android.content.ComponentCallbacks2;
+import android.content.res.Configuration;
+import android.opengl.ManagedEGLContext;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.SystemProperties;
+import android.util.AndroidRuntimeException;
+import android.util.Log;
+import android.view.inputmethod.InputMethodManager;
+
+import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.PrintWriter;
+
+/**
+ * Provides low-level communication with the system window manager for
+ * operations that are not associated with any particular context.
+ *
+ * This class is only used internally to implement global functions where
+ * the caller already knows the display and relevant compatibility information
+ * for the operation.  For most purposes, you should use {@link WindowManager} instead
+ * since it is bound to a context.
+ *
+ * @see WindowManagerImpl
+ * @hide
+ */
+public final class WindowManagerGlobal {
+    private static final String TAG = "WindowManager";
+
+    /**
+     * The user is navigating with keys (not the touch screen), so
+     * navigational focus should be shown.
+     */
+    public static final int RELAYOUT_RES_IN_TOUCH_MODE = 0x1;
+
+    /**
+     * This is the first time the window is being drawn,
+     * so the client must call drawingFinished() when done
+     */
+    public static final int RELAYOUT_RES_FIRST_TIME = 0x2;
+
+    /**
+     * The window manager has changed the surface from the last call.
+     */
+    public static final int RELAYOUT_RES_SURFACE_CHANGED = 0x4;
+
+    /**
+     * The window manager is currently animating.  It will call
+     * IWindow.doneAnimating() when done.
+     */
+    public static final int RELAYOUT_RES_ANIMATING = 0x8;
+
+    /**
+     * Flag for relayout: the client will be later giving
+     * internal insets; as a result, the window will not impact other window
+     * layouts until the insets are given.
+     */
+    public static final int RELAYOUT_INSETS_PENDING = 0x1;
+
+    /**
+     * Flag for relayout: the client may be currently using the current surface,
+     * so if it is to be destroyed as a part of the relayout the destroy must
+     * be deferred until later.  The client will call performDeferredDestroy()
+     * when it is okay.
+     */
+    public static final int RELAYOUT_DEFER_SURFACE_DESTROY = 0x2;
+
+    public static final int ADD_FLAG_APP_VISIBLE = 0x2;
+    public static final int ADD_FLAG_IN_TOUCH_MODE = RELAYOUT_RES_IN_TOUCH_MODE;
+
+    public static final int ADD_OKAY = 0;
+    public static final int ADD_BAD_APP_TOKEN = -1;
+    public static final int ADD_BAD_SUBWINDOW_TOKEN = -2;
+    public static final int ADD_NOT_APP_TOKEN = -3;
+    public static final int ADD_APP_EXITING = -4;
+    public static final int ADD_DUPLICATE_ADD = -5;
+    public static final int ADD_STARTING_NOT_NEEDED = -6;
+    public static final int ADD_MULTIPLE_SINGLETON = -7;
+    public static final int ADD_PERMISSION_DENIED = -8;
+
+    private static WindowManagerGlobal sDefaultWindowManager;
+    private static IWindowManager sWindowManagerService;
+    private static IWindowSession sWindowSession;
+
+    private final Object mLock = new Object();
+
+    private View[] mViews;
+    private ViewRootImpl[] mRoots;
+    private WindowManager.LayoutParams[] mParams;
+    private boolean mNeedsEglTerminate;
+
+    private Runnable mSystemPropertyUpdater;
+
+    private WindowManagerGlobal() {
+    }
+
+    public static WindowManagerGlobal getInstance() {
+        synchronized (WindowManagerGlobal.class) {
+            if (sDefaultWindowManager == null) {
+                sDefaultWindowManager = new WindowManagerGlobal();
+            }
+            return sDefaultWindowManager;
+        }
+    }
+
+    public static IWindowManager getWindowManagerService() {
+        synchronized (WindowManagerGlobal.class) {
+            if (sWindowManagerService == null) {
+                sWindowManagerService = IWindowManager.Stub.asInterface(
+                        ServiceManager.getService("window"));
+            }
+            return sWindowManagerService;
+        }
+    }
+
+    public static IWindowSession getWindowSession(Looper mainLooper) {
+        synchronized (WindowManagerGlobal.class) {
+            if (sWindowSession == null) {
+                try {
+                    InputMethodManager imm = InputMethodManager.getInstance(mainLooper);
+                    IWindowManager windowManager = getWindowManagerService();
+                    sWindowSession = windowManager.openSession(
+                            imm.getClient(), imm.getInputContext());
+                    float animatorScale = windowManager.getAnimationScale(2);
+                    ValueAnimator.setDurationScale(animatorScale);
+                } catch (RemoteException e) {
+                    Log.e(TAG, "Failed to open window session", e);
+                }
+            }
+            return sWindowSession;
+        }
+    }
+
+    public static IWindowSession peekWindowSession() {
+        synchronized (WindowManagerGlobal.class) {
+            return sWindowSession;
+        }
+    }
+
+    public void addView(View view, ViewGroup.LayoutParams params,
+            Display display, Window parentWindow) {
+        if (view == null) {
+            throw new IllegalArgumentException("view must not be null");
+        }
+        if (display == null) {
+            throw new IllegalArgumentException("display must not be null");
+        }
+        if (!(params instanceof WindowManager.LayoutParams)) {
+            throw new IllegalArgumentException("Params must be WindowManager.LayoutParams");
+        }
+
+        final WindowManager.LayoutParams wparams = (WindowManager.LayoutParams)params;
+        if (parentWindow != null) {
+            parentWindow.adjustLayoutParamsForSubWindow(wparams);
+        }
+
+        ViewRootImpl root;
+        View panelParentView = null;
+
+        synchronized (mLock) {
+            // Start watching for system property changes.
+            if (mSystemPropertyUpdater == null) {
+                mSystemPropertyUpdater = new Runnable() {
+                    @Override public void run() {
+                        synchronized (mLock) {
+                            for (ViewRootImpl root : mRoots) {
+                                root.loadSystemProperties();
+                            }
+                        }
+                    }
+                };
+                SystemProperties.addChangeCallback(mSystemPropertyUpdater);
+            }
+
+            int index = findViewLocked(view, false);
+            if (index >= 0) {
+                throw new IllegalStateException("View " + view
+                        + " has already been added to the window manager.");
+            }
+
+            // If this is a panel window, then find the window it is being
+            // attached to for future reference.
+            if (wparams.type >= WindowManager.LayoutParams.FIRST_SUB_WINDOW &&
+                    wparams.type <= WindowManager.LayoutParams.LAST_SUB_WINDOW) {
+                final int count = mViews != null ? mViews.length : 0;
+                for (int i=0; i<count; i++) {
+                    if (mRoots[i].mWindow.asBinder() == wparams.token) {
+                        panelParentView = mViews[i];
+                    }
+                }
+            }
+
+            root = new ViewRootImpl(view.getContext(), display);
+
+            view.setLayoutParams(wparams);
+
+            if (mViews == null) {
+                index = 1;
+                mViews = new View[1];
+                mRoots = new ViewRootImpl[1];
+                mParams = new WindowManager.LayoutParams[1];
+            } else {
+                index = mViews.length + 1;
+                Object[] old = mViews;
+                mViews = new View[index];
+                System.arraycopy(old, 0, mViews, 0, index-1);
+                old = mRoots;
+                mRoots = new ViewRootImpl[index];
+                System.arraycopy(old, 0, mRoots, 0, index-1);
+                old = mParams;
+                mParams = new WindowManager.LayoutParams[index];
+                System.arraycopy(old, 0, mParams, 0, index-1);
+            }
+            index--;
+
+            mViews[index] = view;
+            mRoots[index] = root;
+            mParams[index] = wparams;
+        }
+
+        // do this last because it fires off messages to start doing things
+        root.setView(view, wparams, panelParentView);
+    }
+
+    public void updateViewLayout(View view, ViewGroup.LayoutParams params) {
+        if (view == null) {
+            throw new IllegalArgumentException("view must not be null");
+        }
+        if (!(params instanceof WindowManager.LayoutParams)) {
+            throw new IllegalArgumentException("Params must be WindowManager.LayoutParams");
+        }
+
+        final WindowManager.LayoutParams wparams = (WindowManager.LayoutParams)params;
+
+        view.setLayoutParams(wparams);
+
+        synchronized (mLock) {
+            int index = findViewLocked(view, true);
+            ViewRootImpl root = mRoots[index];
+            mParams[index] = wparams;
+            root.setLayoutParams(wparams, false);
+        }
+    }
+
+    public void removeView(View view, boolean immediate) {
+        if (view == null) {
+            throw new IllegalArgumentException("view must not be null");
+        }
+
+        synchronized (mLock) {
+            int index = findViewLocked(view, true);
+            View curView = removeViewLocked(index, immediate);
+            if (curView == view) {
+                return;
+            }
+
+            throw new IllegalStateException("Calling with view " + view
+                    + " but the ViewAncestor is attached to " + curView);
+        }
+    }
+
+    public void closeAll(IBinder token, String who, String what) {
+        synchronized (mLock) {
+            if (mViews == null)
+                return;
+
+            int count = mViews.length;
+            //Log.i("foo", "Closing all windows of " + token);
+            for (int i=0; i<count; i++) {
+                //Log.i("foo", "@ " + i + " token " + mParams[i].token
+                //        + " view " + mRoots[i].getView());
+                if (token == null || mParams[i].token == token) {
+                    ViewRootImpl root = mRoots[i];
+
+                    //Log.i("foo", "Force closing " + root);
+                    if (who != null) {
+                        WindowLeaked leak = new WindowLeaked(
+                                what + " " + who + " has leaked window "
+                                + root.getView() + " that was originally added here");
+                        leak.setStackTrace(root.getLocation().getStackTrace());
+                        Log.e(TAG, leak.getMessage(), leak);
+                    }
+
+                    removeViewLocked(i, false);
+                    i--;
+                    count--;
+                }
+            }
+        }
+    }
+
+    private View removeViewLocked(int index, boolean immediate) {
+        ViewRootImpl root = mRoots[index];
+        View view = root.getView();
+
+        if (view != null) {
+            InputMethodManager imm = InputMethodManager.getInstance(view.getContext());
+            if (imm != null) {
+                imm.windowDismissed(mViews[index].getWindowToken());
+            }
+        }
+        root.die(immediate);
+
+        final int count = mViews.length;
+
+        // remove it from the list
+        View[] tmpViews = new View[count-1];
+        removeItem(tmpViews, mViews, index);
+        mViews = tmpViews;
+
+        ViewRootImpl[] tmpRoots = new ViewRootImpl[count-1];
+        removeItem(tmpRoots, mRoots, index);
+        mRoots = tmpRoots;
+
+        WindowManager.LayoutParams[] tmpParams
+                = new WindowManager.LayoutParams[count-1];
+        removeItem(tmpParams, mParams, index);
+        mParams = tmpParams;
+
+        if (view != null) {
+            view.assignParent(null);
+            // func doesn't allow null...  does it matter if we clear them?
+            //view.setLayoutParams(null);
+        }
+        return view;
+    }
+
+    private static void removeItem(Object[] dst, Object[] src, int index) {
+        if (dst.length > 0) {
+            if (index > 0) {
+                System.arraycopy(src, 0, dst, 0, index);
+            }
+            if (index < dst.length) {
+                System.arraycopy(src, index+1, dst, index, src.length-index-1);
+            }
+        }
+    }
+
+    private int findViewLocked(View view, boolean required) {
+        synchronized (mLock) {
+            if (mViews != null) {
+                final int count = mViews.length;
+                for (int i = 0; i < count; i++) {
+                    if (mViews[i] == view) {
+                        return i;
+                    }
+                }
+            }
+            if (required) {
+                throw new IllegalArgumentException("View not attached to window manager");
+            }
+            return -1;
+        }
+    }
+
+    public void startTrimMemory(int level) {
+        if (HardwareRenderer.isAvailable()) {
+            // On low-end gfx devices we trim when memory is moderate;
+            // on high-end devices we do this when low.
+            if (level >= ComponentCallbacks2.TRIM_MEMORY_COMPLETE
+                    || (level >= ComponentCallbacks2.TRIM_MEMORY_MODERATE
+                            && !ActivityManager.isHighEndGfx())) {
+                // Destroy all hardware surfaces and resources associated to
+                // known windows
+                synchronized (mLock) {
+                    if (mViews == null) return;
+                    int count = mViews.length;
+                    for (int i = 0; i < count; i++) {
+                        mRoots[i].terminateHardwareResources();
+                    }
+                }
+                // Force a full memory flush
+                mNeedsEglTerminate = true;
+                HardwareRenderer.startTrimMemory(ComponentCallbacks2.TRIM_MEMORY_COMPLETE);
+                return;
+            }
+
+            HardwareRenderer.startTrimMemory(level);
+        }
+    }
+
+    public void endTrimMemory() {
+        HardwareRenderer.endTrimMemory();
+
+        if (mNeedsEglTerminate) {
+            ManagedEGLContext.doTerminate();
+            mNeedsEglTerminate = false;
+        }
+    }
+
+    public void trimLocalMemory() {
+        synchronized (mLock) {
+            if (mViews == null) return;
+            int count = mViews.length;
+            for (int i = 0; i < count; i++) {
+                mRoots[i].destroyHardwareLayers();
+            }
+        }
+    }
+
+    public void dumpGfxInfo(FileDescriptor fd) {
+        FileOutputStream fout = new FileOutputStream(fd);
+        PrintWriter pw = new PrintWriter(fout);
+        try {
+            synchronized (mLock) {
+                if (mViews != null) {
+                    final int count = mViews.length;
+
+                    pw.println("Profile data in ms:");
+
+                    for (int i = 0; i < count; i++) {
+                        ViewRootImpl root = mRoots[i];
+                        String name = getWindowName(root);
+                        pw.printf("\n\t%s", name);
+
+                        HardwareRenderer renderer =
+                                root.getView().mAttachInfo.mHardwareRenderer;
+                        if (renderer != null) {
+                            renderer.dumpGfxInfo(pw);
+                        }
+                    }
+
+                    pw.println("\nView hierarchy:\n");
+
+                    int viewsCount = 0;
+                    int displayListsSize = 0;
+                    int[] info = new int[2];
+
+                    for (int i = 0; i < count; i++) {
+                        ViewRootImpl root = mRoots[i];
+                        root.dumpGfxInfo(info);
+
+                        String name = getWindowName(root);
+                        pw.printf("  %s\n  %d views, %.2f kB of display lists",
+                                name, info[0], info[1] / 1024.0f);
+                        HardwareRenderer renderer =
+                                root.getView().mAttachInfo.mHardwareRenderer;
+                        if (renderer != null) {
+                            pw.printf(", %d frames rendered", renderer.getFrameCount());
+                        }
+                        pw.printf("\n\n");
+
+                        viewsCount += info[0];
+                        displayListsSize += info[1];
+                    }
+
+                    pw.printf("\nTotal ViewRootImpl: %d\n", count);
+                    pw.printf("Total Views:        %d\n", viewsCount);
+                    pw.printf("Total DisplayList:  %.2f kB\n\n", displayListsSize / 1024.0f);
+                }
+            }
+        } finally {
+            pw.flush();
+        }
+    }
+
+    private static String getWindowName(ViewRootImpl root) {
+        return root.mWindowAttributes.getTitle() + "/" +
+                root.getClass().getName() + '@' + Integer.toHexString(root.hashCode());
+    }
+
+    public void setStoppedState(IBinder token, boolean stopped) {
+        synchronized (mLock) {
+            if (mViews != null) {
+                int count = mViews.length;
+                for (int i=0; i < count; i++) {
+                    if (token == null || mParams[i].token == token) {
+                        ViewRootImpl root = mRoots[i];
+                        root.setStopped(stopped);
+                    }
+                }
+            }
+        }
+    }
+
+    public void reportNewConfiguration(Configuration config) {
+        synchronized (mLock) {
+            if (mViews != null) {
+                int count = mViews.length;
+                config = new Configuration(config);
+                for (int i=0; i < count; i++) {
+                    ViewRootImpl root = mRoots[i];
+                    root.requestUpdateConfiguration(config);
+                }
+            }
+        }
+    }
+}
+
+final class WindowLeaked extends AndroidRuntimeException {
+    public WindowLeaked(String msg) {
+        super(msg);
+    }
+}