thumbnailer

A Flutter plugin that is able to generate thumbnails for images, pdf and xlsx files

if thumbnail generation is not supported for specific mime type, then a fallback icon from FontAwesome is returned
supports registering custom mime type handlers for dynamic extendability
resulting thumbnail (or fallback icon) is flutter widget
supports custom resizing/styling of the resulting thumbnail

Why

In time of creation of this plugin, there was no available solution on pub.dev

Usage

To use this plugin, add thumbnailer as a dependency in your pubspec.yaml file.

Icons

By default, plugin provides following icons based on mimetype

MIME Type	Icon
`image`
`application/pdf`
`application/msword`
`application/vnd.openxmlformats-officedocument.wordprocessingml.document`
`application/vnd.oasis.opendocument.text`
`application/vnd.ms-excel`
`application/vnd.openxmlformats-officedocument.spreadsheetml.sheet`
`application/vnd.oasis.opendocument.spreadsheet`
`application/vnd.ms-powerpoint`
`application/vnd.openxmlformats-officedocument.presentationml.presentation`
`application/vnd.oasis.opendocument.presentation`
`text/plain`
`text/csv`
`application/x-archive`
`application/x-cpio`
`application/x-shar`
`application/x-iso9660-image`
`application/x-sbx`
`application/x-tar`
`application/x-bzip2`
`application/gzip`
`application/x-lzip`
`application/x-lzma`
`application/x-lzop`
`application/x-snappy-framed`
`application/x-xz`
`application/x-compress`
`application/zstd`
`application/java-archive`
`application/octet-stream`
`application/vnd.android.package-archive`
`application/vnd.ms-cab-compressed`
`application/x-7z-compressed`
`application/x-ace-compressed`
`application/x-alz-compressed`
`application/x-apple-diskimage`
`application/x-arj`
`application/x-astrotite-afa`
`application/x-b1`
`application/x-cfs-compressed`
`application/x-dar`
`application/x-dgc-compressed`
`application/x-freearc`
`application/x-gca-compressed`
`application/x-gtar`
`application/x-lzh`
`application/x-lzx`
`application/x-ms-wim`
`application/x-rar-compressed`
`application/x-stuffit`
`application/x-stuffitx`
`application/x-xar`
`application/x-zoo`
`application/zip`
`text/html`
`text/javascript`
`text/css`
`text/x-python`
`application/x-python-code`
`text/xml`
`application/xml`
`text/x-c`
`application/java`
`application/java-byte-code`
`application/x-java-class`
`application/x-csh`
`text/x-script.csh`
`text/x-fortran`
`text/x-h`
`application/x-ksh`
`text/x-script.ksh`
`application/x-latex`
`application/x-lisp`
`text/x-script.lisp`
`text/x-m`
`text/x-pascal`
`text/x-script.perl`
`application/postscript`
`text/x-script.phyton`
`application/x-bytecode.python`
`text/x-asm`
`application/x-bsh`
`application/x-sh`
`text/x-script.sh`
`text/x-script.zsh`
`default`

You can override these, or add custom one using Thumbnailer.addCustomMimeTypesToIconDataMappings

Generation strategies

Thunbnailer allows you to provide custom thumbnail based on dynamic variables like content of file. Basic implementacion have following generation strategies:

Images — show inlined image
PDF — Show highlight of first page
XLS / ODT — Show highlight of first sheet.

You can extend these using Thumbnailer.addCustomGenerationStrategies

Example

Check the example tab here in pub.dev or example project on GitHub

Contribution and Support

Contributions are welcome!
If you want to contribute code please create a PR
If you find a bug or want a feature, please fill an issue