getImageBlock method

@override Future<Widget?> getImageBlock(String line, [ Alignment? alignment ])

Implementation

@override
Future<pw.Widget?> getImageBlock(String line, [pw.Alignment? alignment]) async {
  final RegExpMatch? match = Constant.IMAGE_PATTERN.firstMatch(line);
  double? width = null;
  double? height = null;
  if (match != null) {
    final String objectFit = match.group(2)!;
    if (match.group(6) != null) width = double.tryParse(match.group(7)!);
    if (match.group(8) != null) width = double.tryParse(match.group(9)!);
    final String path = match.group(10)!;
    late final File? file;
    if (Constant.IMAGE_FROM_NETWORK_URL.hasMatch(path)) {
      final String url = path;
      final String pathStorage = '${(await getApplicationCacheDirectory()).path}/image (${Random.secure().nextInt(99999) + 50})';
      try {
        file = File(pathStorage);
        await Dio().download(url, pathStorage);
      } on DioException catch (e) {
        final Map<String, dynamic> mapError = <String, dynamic>{
          'error': e.error,
          'message': e.message,
          'request_options': e.requestOptions,
          'response': e.response,
          'stacktrace': e.stackTrace,
          'type': e.type.name,
        };
        debugPrint('${e.message}\n\n${jsonEncode(mapError)}');
        return null;
      }
    }
    file = File(path);
    if (!(await file.exists())) {
      //if not exist the image will create a warning
      return null;
    }
    //calculate exceded height using page format params
    if (height != null && height >= pageHeight) height = pageHeight;
    //calculate exceded width using page format params
    if (width != null && width >= pageWidth) width = pageWidth;
    //calculating object fit type instead use object fit literal enum (it causes out of memory errors)
    if (objectFit.equals('cover') || objectFit.equals('fill')) {
      return pw.Wrap(
        children: <pw.Widget>[
          pw.Container(
            alignment: alignment,
            child: pw.Image(
              pw.MemoryImage((await file.readAsBytes())),
              dpi: 230,
              fit: pw.BoxFit.fitWidth,
              height: pageHeight,
              width: pageWidth,
            ),
          ),
        ],
      );
    }
    if (objectFit.equals('fill-all')) {
      return pw.RichText(
        softWrap: true,
        overflow: pw.TextOverflow.span,
        text: pw.WidgetSpan(
          child: pw.Container(
            alignment: alignment,
            child: pw.Image(
              pw.MemoryImage((await file.readAsBytes())),
              dpi: 230,
              fit: pw.BoxFit.contain,
              height: pageWidth,
              width: pageWidth,
            ),
          ),
        ),
      );
    }
    if (objectFit.equals('fitWidth')) {
      return pw.RichText(
        softWrap: true,
        overflow: pw.TextOverflow.span,
        text: pw.WidgetSpan(
          child: pw.Container(
            alignment: alignment,
            child: pw.Image(
              pw.MemoryImage((await file.readAsBytes())),
              dpi: 230,
              fit: pw.BoxFit.fitWidth,
              height: height,
            ),
          ),
        ),
      );
    }
    if (objectFit.equals('fitHeight')) {
      return pw.RichText(
        softWrap: true,
        overflow: pw.TextOverflow.span,
        text: pw.WidgetSpan(
          child: pw.Container(
            alignment: alignment,
            child: pw.Image(
              pw.MemoryImage((await file.readAsBytes())),
              dpi: 230,
              fit: pw.BoxFit.fitHeight,
              width: width,
            ),
          ),
        ),
      );
    }
    return pw.RichText(
      softWrap: true,
      overflow: pw.TextOverflow.span,
      text: pw.WidgetSpan(
        child: pw.Container(
          alignment: alignment,
          child: pw.Image(
            pw.MemoryImage((await file.readAsBytes())),
            dpi: 230,
            fit: objectFit.resolvePdfFit,
            height: height,
            width: width,
          ),
        ),
      ),
    );
  }
  return null;
}