1 files changed, 366 insertions, 0 deletions
diff --git a/cm/lib/main/java/org/cyanogenmod/platform/internal/ThemeManagerServiceBroker.java b/cm/lib/main/java/org/cyanogenmod/platform/internal/ThemeManagerServiceBroker.java
new file mode 100644
index 0000000..771c537
--- /dev/null
+++ b/cm/lib/main/java/org/cyanogenmod/platform/internal/ThemeManagerServiceBroker.java
@@ -0,0 +1,366 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod 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 org.cyanogenmod.platform.internal;
+
+import android.annotation.NonNull;
+import android.content.ComponentName;
+import android.content.Context;
+import android.os.FileUtils;
+import android.os.IBinder;
+import android.os.RemoteCallbackList;
+import android.os.RemoteException;
+import android.system.ErrnoException;
+import android.system.Os;
+import android.system.StructStat;
+import android.util.Log;
+import android.util.Slog;
+
+import cyanogenmod.app.CMContextConstants;
+import cyanogenmod.platform.Manifest;
+import cyanogenmod.themes.IThemeChangeListener;
+import cyanogenmod.themes.IThemeProcessingListener;
+import cyanogenmod.themes.IThemeService;
+import cyanogenmod.themes.ThemeChangeRequest;
+
+import org.cyanogenmod.internal.util.ThemeUtils;
+import org.cyanogenmod.platform.internal.common.BrokeredServiceConnection;
+
+import java.io.File;
+
+import static cyanogenmod.platform.Manifest.permission.ACCESS_THEME_MANAGER;
+
+/**
+ * Theme service broker for connecting clients to a backing theme manager service.
+ *
+ * @hide
+ */
+public class ThemeManagerServiceBroker extends BrokerableCMSystemService<IThemeService> {
+    private static final String TAG = ThemeManagerServiceBroker.class.getSimpleName();
+    private static final boolean DEBUG = false;
+
+    private static final ComponentName SERVICE_COMPONENT =
+            new ComponentName("org.cyanogenmod.themeservice",
+                    "org.cyanogenmod.themeservice.ThemeManagerService");
+
+    // Cached change listeners
+    private final RemoteCallbackList<IThemeChangeListener> mChangeListeners =
+            new RemoteCallbackList<>();
+    private final RemoteCallbackList<IThemeProcessingListener> mProcessingListeners =
+            new RemoteCallbackList<>();
+
+    private Context mContext;
+
+    private final IThemeService mServiceStubForFailure = new IThemeService.Stub() {
+        @Override
+        public void requestThemeChangeUpdates(IThemeChangeListener listener) throws RemoteException {
+        }
+
+        @Override
+        public void removeUpdates(IThemeChangeListener listener) throws RemoteException {
+        }
+
+        @Override
+        public void requestThemeChange(ThemeChangeRequest request,
+                boolean removePerAppThemes) throws RemoteException {
+        }
+
+        @Override
+        public void applyDefaultTheme() throws RemoteException {
+        }
+
+        @Override
+        public boolean isThemeApplying() throws RemoteException {
+            return false;
+        }
+
+        @Override
+        public int getProgress() throws RemoteException {
+            return 0;
+        }
+
+        @Override
+        public boolean processThemeResources(String themePkgName) throws RemoteException {
+            return false;
+        }
+
+        @Override
+        public boolean isThemeBeingProcessed(String themePkgName) throws RemoteException {
+            return false;
+        }
+
+        @Override
+        public void registerThemeProcessingListener(
+                IThemeProcessingListener listener) throws RemoteException {
+        }
+
+        @Override
+        public void unregisterThemeProcessingListener(
+                IThemeProcessingListener listener) throws RemoteException {
+        }
+
+        @Override
+        public void rebuildResourceCache() throws RemoteException {
+        }
+
+        @Override
+        public long getLastThemeChangeTime() throws RemoteException {
+            return 0;
+        }
+
+        @Override
+        public int getLastThemeChangeRequestType() throws RemoteException {
+            return 0;
+        }
+    };
+
+    private final class BinderService extends IThemeService.Stub {
+
+        @Override
+        public void requestThemeChangeUpdates(IThemeChangeListener listener)
+                throws RemoteException {
+            enforcePermission();
+            getBrokeredService().requestThemeChangeUpdates(listener);
+            mChangeListeners.register(listener);
+        }
+
+        @Override
+        public void removeUpdates(IThemeChangeListener listener) throws RemoteException {
+            enforcePermission();
+            getBrokeredService().removeUpdates(listener);
+            mChangeListeners.unregister(listener);
+        }
+
+        @Override
+        public void requestThemeChange(ThemeChangeRequest request,
+                boolean removePerAppThemes) throws RemoteException {
+            enforcePermission();
+            getBrokeredService().requestThemeChange(request, removePerAppThemes);
+        }
+
+        @Override
+        public void applyDefaultTheme() throws RemoteException {
+            enforcePermission();
+            getBrokeredService().applyDefaultTheme();
+        }
+
+        @Override
+        public boolean isThemeApplying() throws RemoteException {
+            enforcePermission();
+            return getBrokeredService().isThemeApplying();
+        }
+
+        @Override
+        public int getProgress() throws RemoteException {
+            enforcePermission();
+            return getBrokeredService().getProgress();
+        }
+
+        @Override
+        public boolean processThemeResources(String themePkgName) throws RemoteException {
+            enforcePermission();
+            return getBrokeredService().processThemeResources(themePkgName);
+        }
+
+        @Override
+        public boolean isThemeBeingProcessed(String themePkgName) throws RemoteException {
+            enforcePermission();
+            return getBrokeredService().isThemeBeingProcessed(themePkgName);
+        }
+
+        @Override
+        public void registerThemeProcessingListener(
+                IThemeProcessingListener listener) throws RemoteException {
+            enforcePermission();
+            getBrokeredService().registerThemeProcessingListener(listener);
+            mProcessingListeners.register(listener);
+        }
+
+        @Override
+        public void unregisterThemeProcessingListener(
+                IThemeProcessingListener listener) throws RemoteException {
+            enforcePermission();
+            getBrokeredService().unregisterThemeProcessingListener(listener);
+            mProcessingListeners.unregister(listener);
+        }
+
+        @Override
+        public void rebuildResourceCache() throws RemoteException {
+            enforcePermission();
+            getBrokeredService().rebuildResourceCache();
+        }
+
+        @Override
+        public long getLastThemeChangeTime() throws RemoteException {
+            enforcePermission();
+            return getBrokeredService().getLastThemeChangeTime();
+        }
+
+        @Override
+        public int getLastThemeChangeRequestType() throws RemoteException {
+            enforcePermission();
+            return getBrokeredService().getLastThemeChangeRequestType();
+        }
+    }
+
+    public ThemeManagerServiceBroker(Context context) {
+        super(context);
+        mContext = context;
+        setBrokeredServiceConnection(mServiceConnection);
+    }
+
+    @Override
+    protected IThemeService getIBinderAsIInterface(@NonNull IBinder service) {
+        return IThemeService.Stub.asInterface(service);
+    }
+
+    @Override
+    protected IThemeService getDefaultImplementation() {
+        return mServiceStubForFailure;
+    }
+
+    @Override
+    protected ComponentName getServiceComponent() {
+        return SERVICE_COMPONENT;
+    }
+
+    @Override
+    public String getFeatureDeclaration() {
+        return CMContextConstants.Features.THEMES;
+    }
+
+    @Override
+    public void onStart() {
+        if (DEBUG) Slog.d(TAG, "service started");
+        publishBinderService(CMContextConstants.CM_THEME_SERVICE, new BinderService());
+    }
+
+    @Override
+    protected String getComponentFilteringPermission() {
+        return Manifest.permission.ACCESS_THEME_MANAGER;
+    }
+
+    @Override
+    public void onBootPhase(int phase) {
+        if (phase == PHASE_SYSTEM_SERVICES_READY) {
+            // create the main theme directory for brokered service
+            createDirIfNotExists(ThemeUtils.SYSTEM_THEME_PATH);
+
+            if (shouldMigrateFilePermissions()) {
+                migrateFilePermissions();
+            }
+        } else if (phase == PHASE_ACTIVITY_MANAGER_READY) {
+            tryConnecting();
+        }
+        super.onBootPhase(phase);
+    }
+
+    private BrokeredServiceConnection mServiceConnection = new BrokeredServiceConnection() {
+        @Override
+        public void onBrokeredServiceConnected() {
+            // If any change listeners are cached, register them with the newly connected
+            // service.
+            IThemeService themeService =
+                    getBrokeredService();
+            try {
+                int N = mChangeListeners.beginBroadcast();
+                if (themeService != null && N > 0) {
+                    for (int i = 0; i < N; i++) {
+                        themeService.requestThemeChangeUpdates(
+                                mChangeListeners.getBroadcastItem(i));
+                    }
+                }
+            } catch (RemoteException e) {
+                    /* ignore */
+            } finally {
+                mChangeListeners.finishBroadcast();
+            }
+
+            try {
+                int N = mProcessingListeners.beginBroadcast();
+                if (themeService != null && N > 0) {
+                    for (int i = 0; i < N; i++) {
+                        themeService.registerThemeProcessingListener(
+                                mProcessingListeners.getBroadcastItem(i));
+                    }
+                }
+            } catch (RemoteException e) {
+                    /* ignore */
+            } finally {
+                mProcessingListeners.finishBroadcast();
+            }
+        }
+
+        @Override
+        public void onBrokeredServiceDisconnected() {
+        }
+    };
+
+    private void enforcePermission() {
+        mContext.enforceCallingOrSelfPermission(ACCESS_THEME_MANAGER, null);
+    }
+
+    /**
+     * @return True if {@link ThemeUtils#SYSTEM_THEME_ALARM_PATH} is not writable by other users
+     */
+    private boolean shouldMigrateFilePermissions() {
+        return isUserWritable(ThemeUtils.SYSTEM_THEME_ALARM_PATH);
+    }
+
+    /**
+     * Ensures other users can write files in /data/system/theme/* which is necessary for the
+     * brokered service to write theme data files.  SELinux policies will not allow random third
+     * party apps to write to this location.
+     */
+    private void migrateFilePermissions() {
+        File[] files = new File(ThemeUtils.SYSTEM_THEME_PATH).listFiles();
+        for (File file : files) {
+            setAllUsersWritable(file, true);
+        }
+    }
+
+    private void setAllUsersWritable(File file, boolean recursive) {
+        if (file.isDirectory() && recursive) {
+            File[] files = file.listFiles();
+            for (File childFile : files) {
+                setAllUsersWritable(childFile, recursive);
+            }
+        }
+        if (!isUserWritable(file.getAbsolutePath())) {
+            file.setWritable(true, false);
+        }
+    }
+
+    private boolean isUserWritable(String path) {
+        try {
+            StructStat stat = Os.stat(path);
+            return (stat.st_mode & 2) == 0;
+        } catch (ErrnoException e) {
+            Log.w(TAG, "Cannot stat " + path);
+        }
+        return false;
+    }
+
+    private static void createDirIfNotExists(String dirPath) {
+        final File dir = new File(dirPath);
+        if (!dir.exists()) {
+            if (dir.mkdir()) {
+                FileUtils.setPermissions(dir, FileUtils.S_IRWXU |
+                        FileUtils.S_IRWXG| FileUtils.S_IRWXO, -1, -1);
+            }
+        }
+    }
+}