[automerger] RESTRICT AUTOMERGE: Always use safe labels am: 3b8e6b6a

import android.app.DialogFragment;

import android.app.Fragment;

import android.app.FragmentTransaction;

import android.annotation.NonNull;

import android.content.ComponentName;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.IPackageDeleteObserver2;

import android.content.pm.IPackageManager;

import android.content.pm.PackageInstaller;

import android.content.pm.PackageItemInfo;

import android.content.pm.PackageManager;

import android.content.pm.UserInfo;

import android.net.Uri;

import android.os.ServiceManager;

import android.os.UserHandle;

import android.os.UserManager;

import android.text.Html;

import android.text.TextPaint;

import android.text.TextUtils;

import android.util.Log;

/*

 * com.android.packageinstaller.PackageName set to the application package name

 */

public class UninstallerActivity extends Activity {

    private static final float MAX_LABEL_SIZE_PX = 500f;

    /** The maximum length of a safe label, in characters */

    private static final int MAX_SAFE_LABEL_LENGTH = 50000;

    private static final String TAG = "UninstallerActivity";

    public static class UninstallAlertDialogFragment extends DialogFragment implements

        public Dialog onCreateDialog(Bundle savedInstanceState) {

            final PackageManager pm = getActivity().getPackageManager();

            final DialogInfo dialogInfo = ((UninstallerActivity) getActivity()).mDialogInfo;

            final CharSequence appLabel = dialogInfo.appInfo.loadLabel(pm);

            final CharSequence appLabel = loadSafeLabel(pm, dialogInfo.appInfo);

            AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity());

            StringBuilder messageBuilder = new StringBuilder();

            // If the Activity label differs from the App label, then make sure the user

            // knows the Activity belongs to the App being uninstalled.

            if (dialogInfo.activityInfo != null) {

                final CharSequence activityLabel = dialogInfo.activityInfo.loadLabel(pm);

                final CharSequence activityLabel = loadSafeLabel(pm, dialogInfo.activityInfo);

                if (!activityLabel.equals(appLabel)) {

                    messageBuilder.append(

                            getString(R.string.uninstall_activity_text, activityLabel));

        showConfirmationDialog();

    }

    private static @NonNull CharSequence loadSafeLabel(@NonNull PackageManager pm,

            @NonNull PackageItemInfo pi) {

        // loadLabel() always returns non-null

        String label = pi.loadLabel(pm).toString();

        // strip HTML tags to avoid <br> and other tags overwriting original message

        String labelStr = Html.fromHtml(label).toString();

        // If the label contains new line characters it may push the UI

        // down to hide a part of it. Labels shouldn't have new line

        // characters, so just truncate at the first time one is seen.

        final int labelLength = Math.min(labelStr.length(), MAX_SAFE_LABEL_LENGTH);

        final StringBuffer sb = new StringBuffer(labelLength);

        int offset = 0;

        while (offset < labelLength) {

            final int codePoint = labelStr.codePointAt(offset);

            final int type = Character.getType(codePoint);

            if (type == Character.LINE_SEPARATOR

                    || type == Character.CONTROL

                    || type == Character.PARAGRAPH_SEPARATOR) {

                labelStr = labelStr.substring(0, offset);

                break;

            }

            // replace all non-break space to " " in order to be trimmed

            final int charCount = Character.charCount(codePoint);

            if (type == Character.SPACE_SEPARATOR) {

                sb.append(' ');

            } else {

                sb.append(labelStr.charAt(offset));

                if (charCount == 2) {

                    sb.append(labelStr.charAt(offset + 1));

                }

            }

            offset += charCount;

        }

        labelStr = sb.toString().trim();

        if (labelStr.isEmpty()) {

            return pi.packageName;

        }

        TextPaint paint = new TextPaint();

        paint.setTextSize(42);

        return TextUtils.ellipsize(labelStr, paint, MAX_LABEL_SIZE_PX,

                TextUtils.TruncateAt.END);

    }

    private void showConfirmationDialog() {

        showDialogFragment(new UninstallAlertDialogFragment());

    }