ro.isdc.wro.model.resource.processor.impl.css
Class FallbackCssDataUriProcessor

java.lang.Object
  ro.isdc.wro.model.resource.processor.impl.css.AbstractCssUrlRewritingProcessor
      ro.isdc.wro.model.resource.processor.impl.css.CssDataUriPreProcessor
          ro.isdc.wro.model.resource.processor.impl.css.FallbackCssDataUriProcessor

All Implemented Interfaces:

ImportAware, ResourcePostProcessor, ResourcePreProcessor

public class FallbackCssDataUriProcessor
extends CssDataUriPreProcessor

Preserves the original css uri along with the new one. This should work also with browsers which do not support dataURI's.

Sample Input:

 div {
   background: url('image.png');
 }
 

Sample output:

  div {
   background: url('image.png');
   background: url('data:image/png;base64,iVBORw0...');
 }
 

Applies the graceful degradation technique. For example, if browser can't parse second rule, it'll use first one.

Since:

1.4.7

Author:

Alex Objelean

Field Summary

static String

ALIAS

Constructor Summary

FallbackCssDataUriProcessor()

Method Summary

protected CssUrlInspector	newCssUrlInspector()
protected String	replaceDeclaration(String originalDeclaration, String modifiedDeclaration) Invoked to replace the entire css declaration.

Methods inherited from class ro.isdc.wro.model.resource.processor.impl.css.CssDataUriPreProcessor

getDataUriGenerator, isReplaceAccepted, isReplaceNeeded, replaceImageUrl, replaceWithDataUri

Methods inherited from class ro.isdc.wro.model.resource.processor.impl.css.AbstractCssUrlRewritingProcessor

cleanImageUrl, getUrlPrefix, isImportAware, onProcessCompleted, onUrlReplaced, process, process

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ALIAS

public static final String ALIAS

See Also:

Constant Field Values

Constructor Detail

FallbackCssDataUriProcessor

public FallbackCssDataUriProcessor()

Method Detail

replaceDeclaration

protected String replaceDeclaration(String originalDeclaration,
                                    String modifiedDeclaration)

Invoked to replace the entire css declaration.

An example of css declaration:

 background: url(/image.png);
 

Useful when the css declaration should be changed. The use-case is: FallbackCssDataUriProcessor.

Overrides:

replaceDeclaration in class AbstractCssUrlRewritingProcessor

Parameters:

originalDeclaration - the original, unchanged declaration.

modifiedDeclaration - the changed expression.

Returns:

the expression to apply. By default the modifiedExpression will be returned.

newCssUrlInspector

protected CssUrlInspector newCssUrlInspector()

Overrides:

newCssUrlInspector in class AbstractCssUrlRewritingProcessor