/*
 * 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 PdfFormXObject extends PdfXObject {
  PdfFormXObject(PdfDocument pdfDocument) : super(pdfDocument, '/Form') {
    params['/FormType'] = PdfStream.string('1');
    params['/BBox'] = PdfStream.string('[0 0 1000 1000]');
  }

  /// The fonts associated with this page
  final Map<String, PdfFont> fonts = <String, PdfFont>{};

  /// The xobjects or other images in the pdf
  final Map<String, PdfXObject> xobjects = <String, PdfXObject>{};

  /// set matrix
  void setMatrix(Matrix4 t) {
    final Float64List s = t.storage;
    params['/Matrix'] =
        PdfStream.string('[${s[0]} ${s[1]} ${s[4]} ${s[5]} ${s[12]} ${s[13]}]');
  }

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

    // Now the resources
    /// This holds any resources for this FormXObject
    final Map<String, PdfStream> resources = <String, PdfStream>{};

    // fonts
    if (fonts.isNotEmpty) {
      resources['/Font'] = PdfStream()..putObjectDictionary(fonts);
    }

    // Now the XObjects
    if (xobjects.isNotEmpty) {
      resources['/XObject'] = PdfStream()..putObjectDictionary(xobjects);
    }

    if (resources.isNotEmpty) {
      params['/Resources'] = PdfStream.dictionary(resources);
    }
  }
}