CoverService class abstract

Provides an easy access to a bitmap version of the publication cover.

While at first glance, getting the cover could be seen as a helper, the implementation actually depends on the publication format:

• Some might allow vector images or even HTML pages, in which case they need to be converted to bitmaps.
• Others require to render the cover from a specific file format, e.g. PDF.

Furthermore, a reading app might want to use a custom strategy to choose the cover image, for example by:

• iterating through the images collection for a publication parsed from an OPDS 2 feed
• generating a bitmap from scratch using the publication's title
• using a cover selected by the user.

Inheritance

• Object
• PublicationService
• CoverService

Implementers

• GeneratedCoverService

Constructors

CoverService()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

links → List<Link>

Links which will be added to Publication.links. It can be used to expose a web API for the service, through Publication.get.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

serviceType → Type

This is the supertype of the service that the subclass is implementing

no setter, override

Methods

close() → void

Closes any opened file handles, removes temporary files, etc.

inherited

cover() → Future<Image?>

Returns the publication cover as a Bitmap at its maximum size.

coverFitting(ImageSize maxSize) → Future<Image?>

Returns the publication cover as a Bitmap, scaled down to fit the given maxSize.

get(Link link) → Resource?

A service can return a Resource to:

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited