content: package com.lb.launcher;
  
  import android.appwidget.AppWidgetHost;
  import android.content.Context;
  import android.content.Intent;
  import android.content.pm.ActivityInfo;
  import android.content.pm.ApplicationInfo;
  import android.content.pm.PackageManager;
  import android.content.pm.ResolveInfo;
  import android.content.res.Resources;
  import android.content.res.XmlResourceParser;
  import android.text.TextUtils;
  import android.util.Log;
  import com.lb.launcher.LauncherSettings.Favorites;
  import org.xmlpull.v1.XmlPullParser;
  import org.xmlpull.v1.XmlPullParserException;
  import java.io.IOException;
  import java.net.URISyntaxException;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  
  /**
   * Implements the layout parser with rules for internal layouts and partner layouts.
   */
  public class DefaultLayoutParser extends AutoInstallsLayout {
      private static final String TAG = "DefaultLayoutParser";
  
      private static final String TAG_RESOLVE = "resolve";
      private static final String TAG_FAVORITES = "favorites";
      private static final String TAG_FAVORITE = "favorite";
      private static final String TAG_APPWIDGET = "appwidget";
      private static final String TAG_SHORTCUT = "shortcut";
      private static final String TAG_FOLDER = "folder";
      private static final String TAG_PARTNER_FOLDER = "partner-folder";
      private static final String TAG_INCLUDE = "include";
  
      private static final String ATTR_URI = "uri";
      private static final String ATTR_WORKSPACE = "workspace";
      private static final String ATTR_CONTAINER = "container";
      private static final String ATTR_SCREEN = "screen";
      private static final String ATTR_FOLDER_ITEMS = "folderItems";
  
      public DefaultLayoutParser(Context context, AppWidgetHost appWidgetHost,
              LayoutParserCallback callback, Resources sourceRes, int layoutId) {
          super(context, appWidgetHost, callback, sourceRes, layoutId, TAG_FAVORITES);
          Log.e(TAG, "Default layout parser initialized");
      }
  
      @Override
      protected HashMap<String, TagParser> getFolderElementsMap() {
          return getFolderElementsMap(mSourceRes);
      }
  
      private HashMap<String, TagParser> getFolderElementsMap(Resources res) {
          HashMap<String, TagParser> parsers = new HashMap<String, TagParser>();
          parsers.put(TAG_FAVORITE, new AppShortcutWithUriParser());
          parsers.put(TAG_SHORTCUT, new UriShortcutParser(res));
          return parsers;
      }
  
      @Override
      protected HashMap<String, TagParser> getLayoutElementsMap() {
          HashMap<String, TagParser> parsers = new HashMap<String, TagParser>();
          parsers.put(TAG_FAVORITE, new AppShortcutWithUriParser());
          parsers.put(TAG_APPWIDGET, new AppWidgetParser());
          parsers.put(TAG_SHORTCUT, new UriShortcutParser(mSourceRes));
          parsers.put(TAG_RESOLVE, new ResolveParser());
          parsers.put(TAG_FOLDER, new MyFolderParser());
          parsers.put(TAG_PARTNER_FOLDER, new PartnerFolderParser());
          return parsers;
      }
  
      @Override
      protected void parseContainerAndScreen(XmlResourceParser parser, long[] out) {
          out[0] = LauncherSettings.Favorites.CONTAINER_DESKTOP;
          String strContainer = getAttributeValue(parser, ATTR_CONTAINER);
          if (strContainer != null) {
              out[0] = Long.valueOf(strContainer);
          }
          out[1] = Long.parseLong(getAttributeValue(parser, ATTR_SCREEN));
      }
  
      @Override
      protected int parseAndAddNode(
              XmlResourceParser parser,
              HashMap<String, TagParser> tagParserMap,
              ArrayList<Long> screenIds)
                      throws XmlPullParserException, IOException {
          if (TAG_INCLUDE.equals(parser.getName())) {
              final int resId = getAttributeResourceValue(parser, ATTR_WORKSPACE, 0);
              if (resId != 0) {
                  // recursively load some more favorites, why not?
                  return parseLayout(resId, screenIds);
              } else {
                  return 0;
              }
          } else {
              return super.parseAndAddNode(parser, tagParserMap, screenIds);
          }
      }
  
      /**
       * AppShortcutParser which also supports adding URI based intents
       */
      private class AppShortcutWithUriParser extends AppShortcutParser {
  
          @Override
          protected long invalidPackageOrClass(XmlResourceParser parser) {
              final String uri = getAttributeValue(parser, ATTR_URI);
              if (TextUtils.isEmpty(uri)) {
                  Log.e(TAG, "Skipping invalid <favorite> with no component or uri");
                  return -1;
              }
  
              final Intent metaIntent;
              try {
                  metaIntent = Intent.parseUri(uri, 0);
              } catch (URISyntaxException e) {
                  Log.e(TAG, "Unable to add meta-favorite: " + uri, e);
                  return -1;
              }
  
              ResolveInfo resolved = mPackageManager.resolveActivity(metaIntent,
                      PackageManager.MATCH_DEFAULT_ONLY);
              final List<ResolveInfo> appList = mPackageManager.queryIntentActivities(
                      metaIntent, PackageManager.MATCH_DEFAULT_ONLY);
  
              // Verify that the result is an app and not just the resolver dialog asking which
              // app to use.
              if (wouldLaunchResolverActivity(resolved, appList)) {
                  // If only one of the results is a system app then choose that as the default.
                  final ResolveInfo systemApp = getSingleSystemActivity(appList);
                  if (systemApp == null) {
                      // There is no logical choice for this meta-favorite, so rather than making
                      // a bad choice just add nothing.
                      Log.w(TAG, "No preference or single system activity found for "
                              + metaIntent.toString());
                      return -1;
                  }
                  resolved = systemApp;
              }
              final ActivityInfo info = resolved.activityInfo;
              final Intent intent = mPackageManager.getLaunchIntentForPackage(info.packageName);
              if (intent == null) {
                  return -1;
              }
              intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
                      Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
  
              return addShortcut(info.loadLabel(mPackageManager).toString(), intent,
                      Favorites.ITEM_TYPE_APPLICATION);
          }
  
          private ResolveInfo getSingleSystemActivity(List<ResolveInfo> appList) {
              ResolveInfo systemResolve = null;
              final int N = appList.size();
              for (int i = 0; i < N; ++i) {
                  try {
                      ApplicationInfo info = mPackageManager.getApplicationInfo(
                              appList.get(i).activityInfo.packageName, 0);
                      if ((info.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
                          if (systemResolve != null) {
                              return null;
                          } else {
                              systemResolve = appList.get(i);
                          }
                      }
                  } catch (PackageManager.NameNotFoundException e) {
                      Log.w(TAG, "Unable to get info about resolve results", e);
                      return null;
                  }
              }
              return systemResolve;
          }
  
          private boolean wouldLaunchResolverActivity(ResolveInfo resolved,
                  List<ResolveInfo> appList) {
              // If the list contains the above resolved activity, then it can't be
              // ResolverActivity itself.
              for (int i = 0; i < appList.size(); ++i) {
                  ResolveInfo tmp = appList.get(i);
                  if (tmp.activityInfo.name.equals(resolved.activityInfo.name)
                          && tmp.activityInfo.packageName.equals(resolved.activityInfo.packageName)) {
                      return false;
                  }
              }
              return true;
          }
      }
  
  
      /**
       * Shortcut parser which allows any uri and not just web urls.
       */
      private class UriShortcutParser extends ShortcutParser {
  
          public UriShortcutParser(Resources iconRes) {
              super(iconRes);
          }
  
          @Override
          protected Intent parseIntent(XmlResourceParser parser) {
              String uri = null;
              try {
                  uri = getAttributeValue(parser, ATTR_URI);
                  return Intent.parseUri(uri, 0);
              } catch (URISyntaxException e) {
                  Log.w(TAG, "Shortcut has malformed uri: " + uri);
                  return null; // Oh well
              }
          }
      }
  
      /**
       * Contains a list of <favorite> nodes, and accepts the first successfully parsed node.
       */
      private class ResolveParser implements TagParser {
  
          private final AppShortcutWithUriParser mChildParser = new AppShortcutWithUriParser();
  
          @Override
          public long parseAndAdd(XmlResourceParser parser) throws XmlPullParserException,
                  IOException {
              final int groupDepth = parser.getDepth();
              int type;
              long addedId = -1;
              while ((type = parser.next()) != XmlPullParser.END_TAG ||
                      parser.getDepth() > groupDepth) {
                  if (type != XmlPullParser.START_TAG || addedId > -1) {
                      continue;
                  }
                  final String fallback_item_name = parser.getName();
                  if (TAG_FAVORITE.equals(fallback_item_name)) {
                      addedId = mChildParser.parseAndAdd(parser);
                  } else {
                      Log.e(TAG, "Fallback groups can contain only favorites, found "
                              + fallback_item_name);
                  }
              }
              return addedId;
          }
      }
  
      /**
       * A parser which adds a folder whose contents come from partner apk.
       */
      private class PartnerFolderParser implements TagParser {
  
          @Override
          public long parseAndAdd(XmlResourceParser parser) throws XmlPullParserException,
                  IOException {
              // Folder contents come from an external XML resource
              final Partner partner = Partner.get(mPackageManager);
              if (partner != null) {
                  final Resources partnerRes = partner.getResources();
                  final int resId = partnerRes.getIdentifier(Partner.RES_FOLDER,
                          "xml", partner.getPackageName());
                  if (resId != 0) {
                      final XmlResourceParser partnerParser = partnerRes.getXml(resId);
                      beginDocument(partnerParser, TAG_FOLDER);
  
                      FolderParser folderParser = new FolderParser(getFolderElementsMap(partnerRes));
                      return folderParser.parseAndAdd(partnerParser);
                  }
              }
              return -1;
          }
      }
  
      /**
       * An extension of FolderParser which allows adding items from a different xml.
       */
      private class MyFolderParser extends FolderParser {
  
          @Override
          public long parseAndAdd(XmlResourceParser parser) throws XmlPullParserException,
                  IOException {
              final int resId = getAttributeResourceValue(parser, ATTR_FOLDER_ITEMS, 0);
              if (resId != 0) {
                  parser = mSourceRes.getXml(resId);
                  beginDocument(parser, TAG_FOLDER);
              }
              return super.parseAndAdd(parser);
          }
      }
  }
  