Merge change 6620 into donut

* changes:
  Keep Gears permissions in sync with system location settings.

core/java/android/webkit/WebSettings.java

@@ -16,15 +16,27 @@
 
 package android.webkit;
 
+import android.content.ContentValues;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Handler;
 import android.os.Message;
+import android.preference.PreferenceManager;
 import android.provider.Checkin;
+import android.provider.Settings;
+import android.util.Log;
 
+import java.io.File;
 import java.lang.SecurityException;
-import android.content.pm.PackageManager;
 
+import android.content.SharedPreferences.Editor;
+import android.content.pm.PackageManager;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteException;
+import android.database.sqlite.SQLiteStatement;
+
+import java.util.HashSet;
 import java.util.Locale;
 
 /**
@@ -176,6 +188,43 @@ public class WebSettings {
     private boolean         mBuiltInZoomControls = false;
     private boolean         mAllowFileAccess = true;
 
+    // Donut-specific hack to keep Gears permissions in sync with the
+    // system location setting.
+    // TODO: Make sure this hack is removed in  Eclair, when Gears
+    // is also removed.
+    // Used to remember if we checked the Gears permissions already.
+    static boolean mCheckedGearsPermissions = false;
+    // The Gears permissions database directory.
+    private final static String GEARS_DATABASE_DIR = "gears";
+    // The Gears permissions database file name.
+    private final static String GEARS_DATABASE_FILE = "permissions.db";
+    // The Gears location permissions table.
+    private final static String GEARS_LOCATION_ACCESS_TABLE_NAME = 
+        "LocationAccess";
+    // The Gears storage access permissions table.
+    private final static String GEARS_STORAGE_ACCESS_TABLE_NAME = "Access";
+    // The Gears permissions db schema version table.
+    private final static String GEARS_SCHEMA_VERSION_TABLE_NAME =
+        "VersionInfo";
+    // The shared pref name.
+    private static final String LAST_KNOWN_LOCATION_SETTING =
+        "lastKnownLocationSystemSetting";
+    // The Browser package name.
+    private static final String BROWSER_PACKAGE_NAME = "com.android.browser";
+    // The Google URLs whitelisted for Gears location access.
+    private static HashSet<String> sGearsWhiteList;
+
+    static {
+        sGearsWhiteList = new HashSet<String>();
+        // NOTE: DO NOT ADD A "/" AT THE END!
+        sGearsWhiteList.add("http://www.google.com");
+        sGearsWhiteList.add("http://www.google.co.uk");
+    }
+
+    private static final String LOGTAG = "webcore";
+    static final boolean DEBUG = false;
+    static final boolean LOGV_ENABLED = DEBUG;
+
     // Class to handle messages before WebCore is ready.
     private class EventHandler {
         // Message id for syncing
@@ -196,6 +245,7 @@ public class WebSettings {
                     switch (msg.what) {
                         case SYNC:
                             synchronized (WebSettings.this) {
+                                checkGearsPermissions();
                                 if (mBrowserFrame.mNativeFrame != 0) {
                                     nativeSync(mBrowserFrame.mNativeFrame);
                                 }
@@ -1163,6 +1213,126 @@ public class WebSettings {
         return size;
     }
 
+    private void checkGearsPermissions() {
+        // Did we already check the permissions?
+        if (mCheckedGearsPermissions) {
+            return;
+        }
+        // Are we running in the browser?
+        if (!BROWSER_PACKAGE_NAME.equals(mContext.getPackageName())) {
+            return;
+        }
+        // Is the pluginsPath sane?
+        if (mPluginsPath == null || mPluginsPath.length() == 0) {
+            // We don't yet have a meaningful plugin path, so
+            // we can't do anything about the Gears permissions.
+            return;
+        }
+        // Remember we checked the Gears permissions.
+        mCheckedGearsPermissions = true;
+        // Get the current system settings.
+        int setting = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.USE_LOCATION_FOR_SERVICES, -1);
+        // Check if we need to set the Gears permissions.
+        if (setting != -1 && locationSystemSettingChanged(setting)) {
+            setGearsPermissionForGoogleDomains(setting);
+        }
+    }
+
+    private boolean locationSystemSettingChanged(int newSetting) {
+        SharedPreferences prefs =
+            PreferenceManager.getDefaultSharedPreferences(mContext);
+        int oldSetting = 0;
+        oldSetting = prefs.getInt(LAST_KNOWN_LOCATION_SETTING, oldSetting);
+        if (oldSetting == newSetting) {
+            return false;
+        }
+        Editor ed = prefs.edit();
+        ed.putInt(LAST_KNOWN_LOCATION_SETTING, newSetting);
+        ed.commit();
+        return true;
+    }
+
+    private void setGearsPermissionForGoogleDomains(int systemPermission) {
+        // Transform the system permission into a Gears permission
+        int gearsPermission = (systemPermission == 1 ? 1 : 2);
+        // Build the path to the Gears library.
+
+        File file = new File(mPluginsPath).getParentFile();
+        if (file == null) {
+            return;
+        }
+        // Build the Gears database file name.
+        file = new File(file.getAbsolutePath() + File.separator 
+                + GEARS_DATABASE_DIR + File.separator + GEARS_DATABASE_FILE);
+        // Remember whether or not we need to create the LocationAccess table.
+        boolean needToCreateTables = !file.exists();
+        // Try opening the Gears database.
+        SQLiteDatabase permissions;
+        try {
+            permissions = SQLiteDatabase.openOrCreateDatabase(file, null);
+        } catch (SQLiteException e) {
+            if (LOGV_ENABLED) {
+                Log.v(LOGTAG, "Could not open Gears permission DB: " +
+                        e.getMessage());
+            }
+            // Just bail out.
+            return;
+        }
+        // We now have a database open. Begin a transaction.
+        permissions.beginTransaction();
+        try {
+            if (needToCreateTables) {
+                // Create the tables. Note that this creates the
+                // Gears tables for the permissions DB schema version 2.
+                // The Gears schema upgrade process will take care of the rest.
+                // First, the storage access table.
+                SQLiteStatement statement = permissions.compileStatement(
+                        "CREATE TABLE IF NOT EXISTS " +
+                        GEARS_STORAGE_ACCESS_TABLE_NAME +
+                        " (Name TEXT UNIQUE, Value)");
+                statement.execute();
+                // Next the location access table.
+                statement = permissions.compileStatement(
+                        "CREATE TABLE IF NOT EXISTS " +
+                        GEARS_LOCATION_ACCESS_TABLE_NAME +
+                        " (Name TEXT UNIQUE, Value)");
+                statement.execute();
+                // Finally, the schema version table.
+                statement = permissions.compileStatement(
+                        "CREATE TABLE IF NOT EXISTS " +
+                        GEARS_SCHEMA_VERSION_TABLE_NAME +
+                        " (Name TEXT UNIQUE, Value)");
+                statement.execute();
+                // Set the schema version to 2.
+                ContentValues schema = new ContentValues();
+                schema.put("Name", "Version");
+                schema.put("Value", 2);
+                permissions.insert(GEARS_SCHEMA_VERSION_TABLE_NAME, null,
+                        schema);
+            }
+
+            ContentValues permissionValues = new ContentValues();
+
+            for (String url : sGearsWhiteList) {
+                permissionValues.put("Name", url);
+                permissionValues.put("Value", gearsPermission);
+                permissions.replace(GEARS_LOCATION_ACCESS_TABLE_NAME, null,
+                        permissionValues);
+                permissionValues.clear();
+            }
+            // Commit the transaction.
+            permissions.setTransactionSuccessful();
+        } catch (SQLiteException e) {
+            if (LOGV_ENABLED) {
+                Log.v(LOGTAG, "Could not set the Gears permissions: " +
+                        e.getMessage());
+            }
+        } finally {
+            permissions.endTransaction();
+            permissions.close();
+        }
+    }
     /* Post a SYNC message to handle syncing the native settings. */
     private synchronized void postSync() {
         // Only post if a sync is not pending