Importer class abstract Importer

An interface for importers that resolves URLs in @imports to the contents of Sass files.

Importers should override toString to provide a human-readable description of the importer. For example, the default filesystem importer returns its load path.

This extends AsyncImporter to guarantee that canonicalize and load are synchronous. It's usable with both the synchronous and asynchronous compile() functions, and as such should be extended in preference to AsyncImporter if possible.

Subclasses should extend Importer, not implement it.

Inheritance

• Object
• AsyncImporter
• Importer

Implementers

• FilesystemImporter
• PackageImporter

Constructors

Importer()

Properties

containingUrl → Uri?

The canonical URL of the stylesheet that caused the current canonicalize invocation.

no setter, inherited

fromImport → bool

Whether the current canonicalize invocation comes from an @import rule.

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

canonicalize(Uri url) → Uri?

If url is recognized by this importer, returns its canonical format.

override

couldCanonicalize(Uri url, Uri canonicalUrl) → bool

Without accessing the filesystem, returns whether or not passing url to canonicalize could possibly return canonicalUrl.

override

isNonCanonicalScheme(String scheme) → bool

Returns whether the given URL scheme (without :) should be considered "non-canonical" for this importer.

override

load(Uri url) → ImporterResult?

Loads the Sass text for the given url, or returns null if this importer can't find the stylesheet it refers to.

override

modificationTime(Uri url) → DateTime

Returns the time that the Sass file at url was last modified.

override

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

Static Properties

noOp → Importer

An importer that never imports any stylesheets.

final