exifdart 0.7.0+3

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exifdart #

Dart module to decode Exif data from jpeg files.

Dart port based on Exif.js: https://github.com/exif-js/exif-js/

Installation #

Depend on it #

Add this to your package's pubspec.yaml file:

dependencies:
  exifdart:

Install it #

You can install packages from the command line:

$ pub get

Usage #

Simple example:

// Add this to have the Rational class too:
// import "package:package:exifdart/exifdart.dart";

// We are not using that in this example, this alone will do fine:
import "package:package:exifdart/exifdart_html.dart";
import "dart:html";

/// Returns the orientation value or `null` if no EXIF or no orientation info
/// is found.
Future<int> getOrientation(Blob blob) async {
  if (blob.type == "image/jpeg") {
    Map<String, dynamic> tags = await readExifFromBlob(blob);
    return tags["Orientation"];
  }

  return null;
}

void main() {
  registerChangeHandler(document.querySelector("input[type=file]"));
}

void registerChangeHandler(InputElement input) {
  input.onChange.listen((Event e) {
    for (File f in input.files) {
      getOrientation(f).then((int orientation) {
        window.console.log("Orientation for ${f.name} is ${orientation}");
      });
    }
  });
}

0.7.0+3 #

  • minor update on example

0.7.0+2 #

  • added documentation
  • added example

0.7.0+1 #

  • fixed when FlashpixVersion is already a string

0.7.0 #

  • ported to Dart 2

0.6.0+1 #

  • fixed the botched release

0.6.0 #

  • created AbstractBlobReader making the core implementation platform independent
  • moved platform dependent code (a HTML Blob based implementation of AbstractBlobReader) available by importing exifdart_html.dart
  • created a dart:io based implementation of AbstractBlobReader and made it available in exifdart_io.dart
  • this is an API breaking release, you have to import both exifdart.dart and exifdart_html.dart ot get the old API

0.5.0+6 #

  • fixed null access on some files that have a type 0 GPSVersionID tag

0.5.0+5 #

  • fixed offset errors in BlobView and CacheView

0.5.0+4 #

  • changed switch block to make dart2js happy

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:


dependencies:
  exifdart: ^0.7.0+3

2. Install it

You can install packages from the command line:

with pub:


$ pub get

with Flutter:


$ flutter pub get

Alternatively, your editor might support pub get or flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:


import 'package:exifdart/exifdart.dart';
  
Popularity:
Describes how popular the package is relative to other packages. [more]
75
Health:
Code health derived from static analysis. [more]
67
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
100
Overall:
Weighted score of the above. [more]
78
Learn more about scoring.

We analyzed this package on Nov 21, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.6.1
  • pana: 0.12.21

Platforms

Detected platforms: Flutter, web, other

No platform restriction found in primary library package:exifdart/exifdart.dart.

Health suggestions

Fix lib/src/exif_extractor.dart. (-11.78 points)

Analysis of lib/src/exif_extractor.dart reported 25 hints, including:

line 38 col 10: Unnecessary new keyword.

line 38 col 45: Unnecessary new keyword.

line 70 col 11: DO use curly braces for all flow control structures.

line 106 col 41: Avoid const keyword.

line 182 col 28: Unnecessary new keyword.

Fix lib/src/constants.dart. (-9.99 points)

Analysis of lib/src/constants.dart reported 21 hints, including:

line 2 col 40: Avoid const keyword.

line 84 col 44: Avoid const keyword.

line 120 col 43: Avoid const keyword.

line 154 col 61: Avoid const keyword.

line 155 col 24: Avoid const keyword.

Fix lib/src/blob_view.dart. (-9.54 points)

Analysis of lib/src/blob_view.dart reported 20 hints, including:

line 41 col 7: DO use curly braces for all flow control structures.

line 42 col 35: Unnecessary new keyword.

line 43 col 12: Unnecessary new keyword.

line 52 col 7: DO use curly braces for all flow control structures.

line 52 col 14: Unnecessary new keyword.

Fix additional 3 files with analysis or formatting issues. (-6.42 points)

Additional issues in the following files:

  • lib/src/blob_reader_html.dart (6 hints)
  • lib/src/blob_reader_io.dart (6 hints)
  • lib/src/abstract_reader.dart (1 hint)

Maintenance suggestions

Maintain an example.

None of the files in the package's example/ directory matches known example patterns.

Common filename patterns include main.dart, example.dart, and exifdart.dart. Packages with multiple examples should provide example/README.md.

For more information see the pub package layout conventions.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0 <3.0.0