/
WikiVisitUrls.java
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/
WikiVisitUrls.java
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/*
* Copyright (C) 2014-2024 Philip Helger (www.helger.com)
* philip[at]helger[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.helger.css.supplementary.wiki;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.helger.css.CSSSourceLocation;
import com.helger.css.ECSSVersion;
import com.helger.css.decl.CSSDeclaration;
import com.helger.css.decl.CSSExpressionMemberTermURI;
import com.helger.css.decl.CSSImportRule;
import com.helger.css.decl.CascadingStyleSheet;
import com.helger.css.decl.ICSSTopLevelRule;
import com.helger.css.decl.visit.CSSVisitor;
import com.helger.css.decl.visit.DefaultCSSUrlVisitor;
import com.helger.css.reader.CSSReader;
/**
* Example how to extract all URLs from a certain CSS file using a
* {@link DefaultCSSUrlVisitor}.
*
* @author Philip Helger
*/
public final class WikiVisitUrls
{
public static String getSourceLocationString (@Nonnull final CSSSourceLocation aSourceLoc)
{
return "source location reaches from [" +
aSourceLoc.getFirstTokenBeginLineNumber () +
"/" +
aSourceLoc.getFirstTokenBeginColumnNumber () +
"] up to [" +
aSourceLoc.getLastTokenEndLineNumber () +
"/" +
aSourceLoc.getLastTokenEndColumnNumber () +
"]";
}
public void readFromStyleAttributeWithAPI ()
{
final String sStyle = "@import 'foobar.css';\n" +
"div{background:fixed url(a.gif) !important;}\n" +
"span { background-image:url('/my/folder/b.gif');}";
final CascadingStyleSheet aCSS = CSSReader.readFromString (sStyle, ECSSVersion.CSS30);
CSSVisitor.visitCSSUrl (aCSS, new DefaultCSSUrlVisitor ()
{
// Called for each import
@Override
public void onImport (@Nonnull final CSSImportRule aImportRule)
{
System.out.println ("Import: " +
aImportRule.getLocationString () +
" - " +
getSourceLocationString (aImportRule.getSourceLocation ()));
}
// Call for URLs outside of URLs
@Override
public void onUrlDeclaration (@Nullable final ICSSTopLevelRule aTopLevelRule,
@Nonnull final CSSDeclaration aDeclaration,
@Nonnull final CSSExpressionMemberTermURI aURITerm)
{
System.out.println (aDeclaration.getProperty () +
" - references: " +
aURITerm.getURIString () +
" - " +
getSourceLocationString (aURITerm.getSourceLocation ()));
}
});
}
}