/*
 * Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
 *
 * 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.
 */

part of pdf;

class PdfNames extends PdfObject {
  /// This constructs a Pdf Name object
  PdfNames(PdfDocument pdfDocument) : super(pdfDocument);

  final List<PdfStream> _dests = <PdfStream>[];

  void addDest(
    String name,
    PdfPage page, {
    double posX,
    double posY,
    double posZ,
  }) {
    assert(page.pdfDocument == pdfDocument);
    assert(name != null);

    _dests.add(PdfStream()..putText(name));
    _dests.add(PdfStream()
      ..putDictionary(<String, PdfStream>{
        '/D': PdfStream()
          ..putArray(<PdfStream>[
            page.ref(),
            PdfStream.string('/XYZ'),
            if (posX == null) PdfStream.string('null') else PdfStream.num(posX),
            if (posY == null) PdfStream.string('null') else PdfStream.num(posY),
            if (posZ == null) PdfStream.string('null') else PdfStream.num(posZ),
          ]),
      }));
  }

  @override
  void _prepare() {
    super._prepare();

    params['/Dests'] = PdfStream()
      ..putDictionary(<String, PdfStream>{
        '/Names': PdfStream()..putArray(_dests),
      });
  }
}