ro.isdc.wro.model.resource.processor.impl.css
Class CssDataUriPreProcessor
java.lang.Object
ro.isdc.wro.model.resource.processor.impl.css.AbstractCssUrlRewritingProcessor
ro.isdc.wro.model.resource.processor.impl.css.CssDataUriPreProcessor
- All Implemented Interfaces:
- ImportAware, ResourcePostProcessor, ResourcePreProcessor
- Direct Known Subclasses:
- DuplicatesAwareCssDataUriPreProcessor, FallbackCssDataUriProcessor
public class CssDataUriPreProcessor
- extends AbstractCssUrlRewritingProcessor
Rewrites background images by replacing the url with data uri of the image. If the replacement is not successful, it
is left unchanged.
Attention: This processor should be added before CssUrlRewritingProcessor
, otherwise the url's won't be
replaced. For more details, @see DataUri Scheme on
Wikipedia
- Author:
- Alex Objelean
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ALIAS
public static final String ALIAS
- See Also:
- Constant Field Values
CssDataUriPreProcessor
public CssDataUriPreProcessor()
replaceImageUrl
protected String replaceImageUrl(String cssUri,
String imageUrl)
- Replace provided url with the new url if needed.
- Specified by:
replaceImageUrl
in class AbstractCssUrlRewritingProcessor
- Parameters:
imageUrl
- to replace.cssUri
- Uri of the parsed css.
- Returns:
- replaced url.
isReplaceAccepted
protected boolean isReplaceAccepted(String dataUri)
- Similar to
isReplaceAccepted(String)
, but decides whether the computed dataUri
should replace the image url. It is useful when you want to limit the dataUri size. By default the size of dataUri
is limited to 32KB (because IE8 has a 32KB limitation).
- Parameters:
dataUri
- base64 encoded stream.
- Returns:
- true if dataUri should replace original image url.
replaceWithDataUri
@Deprecated
protected boolean replaceWithDataUri(String dataUri)
- Deprecated. use
isReplaceAccepted(String)
instead.
isReplaceNeeded
protected boolean isReplaceNeeded(String url)
- Check if url must be replaced or not. The replacement is not needed if the url of the image is absolute (can be
resolved by urlResourceLocator) or if the url is a data uri (base64 encoded value).
- Overrides:
isReplaceNeeded
in class AbstractCssUrlRewritingProcessor
- Parameters:
url
- to check.
- Returns:
- true if url needs to be replaced or remain unchanged.
getDataUriGenerator
protected DataUriGenerator getDataUriGenerator()
- Returns:
- the DataUriGenerator class responsible for transforming streams into base64 encoded strings.
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