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feat: Added links internalization (#10)
* feat: Added links internalization Refs: #DEV-11660
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37 changes: 37 additions & 0 deletions
37
src/main/java/ch/sbb/polarion/extension/pdf/exporter/util/html/ExternalCssInternalizer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package ch.sbb.polarion.extension.pdf.exporter.util.html; | ||
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| import ch.sbb.polarion.extension.pdf.exporter.util.FileResourceProvider; | ||
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| import java.util.Map; | ||
| import java.util.Optional; | ||
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| public class ExternalCssInternalizer implements LinkInternalizer { | ||
| private static final String DATA_PRECEDENCE = "data-precedence"; | ||
| private final FileResourceProvider fileResourceProvider; | ||
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| public ExternalCssInternalizer(FileResourceProvider fileResourceProvider) { | ||
| this.fileResourceProvider = fileResourceProvider; | ||
| } | ||
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| @Override | ||
| public Optional<String> inline(Map<String, String> attributes) { | ||
| if (!"stylesheet".equals(attributes.get("rel")) | ||
| || !attributes.containsKey("href")) { | ||
| return Optional.empty(); | ||
| } | ||
| StringBuilder inlinedContent = new StringBuilder("<style"); | ||
| if (attributes.containsKey(DATA_PRECEDENCE)) { | ||
| inlinedContent.append(" ") | ||
| .append(DATA_PRECEDENCE) | ||
| .append("=\"") | ||
| .append(attributes.get(DATA_PRECEDENCE)) | ||
| .append("\""); | ||
| } | ||
| inlinedContent.append(">"); | ||
| String url = attributes.get("href"); | ||
| inlinedContent.append(new String(fileResourceProvider.getResourceAsBytes(url))); | ||
| inlinedContent.append("</style>"); | ||
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| return Optional.of(inlinedContent.toString()); | ||
| } | ||
| } |
72 changes: 72 additions & 0 deletions
72
src/main/java/ch/sbb/polarion/extension/pdf/exporter/util/html/HtmlLinksHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| package ch.sbb.polarion.extension.pdf.exporter.util.html; | ||
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| import ch.sbb.polarion.extension.pdf.exporter.properties.PdfExporterExtensionConfiguration; | ||
| import ch.sbb.polarion.extension.pdf.exporter.util.FileResourceProvider; | ||
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| import java.util.LinkedHashMap; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.Set; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| public class HtmlLinksHelper { | ||
| private static final Pattern LINK_PATTERN = Pattern.compile("<link\\s*[^>]*>", Pattern.CASE_INSENSITIVE); | ||
| private static final Pattern ATTRIBUTE_PATTERN = Pattern.compile("([\\w-]+)\\s*=\\s*(['\"])(.*?)\\2"); | ||
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| private final Set<LinkInternalizer> linkInliners; | ||
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| public HtmlLinksHelper(FileResourceProvider fileResourceProvider) { | ||
| this (Set.of( | ||
| new ExternalCssInternalizer(fileResourceProvider) | ||
| )); | ||
| } | ||
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| public HtmlLinksHelper(Set<LinkInternalizer> linkInliners) { | ||
| this.linkInliners = linkInliners; | ||
| } | ||
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| public String internalizeLinks(String htmlContent) { | ||
| boolean linksInternalizationEnabled = PdfExporterExtensionConfiguration.getInstance().getInternalizeExternalCss(); | ||
| if (!linksInternalizationEnabled) { | ||
| return htmlContent; | ||
| } | ||
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| Matcher matcher = LINK_PATTERN.matcher(htmlContent); | ||
| StringBuilder newHtmlContent = new StringBuilder(); | ||
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| while (matcher.find()) { | ||
| String linkTag = matcher.group(0); | ||
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| Map<String, String> attributesMap = parseLinkTagAttributes(linkTag); | ||
| String replacement = inlineLinkTag(linkTag, attributesMap); | ||
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| matcher.appendReplacement(newHtmlContent, Matcher.quoteReplacement(replacement)); | ||
| } | ||
| matcher.appendTail(newHtmlContent); | ||
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| return newHtmlContent.toString(); | ||
| } | ||
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| public static Map<String, String> parseLinkTagAttributes(String linkTag) { | ||
| Map<String, String> attributes = new LinkedHashMap<>(); | ||
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| Matcher matcher = ATTRIBUTE_PATTERN.matcher(linkTag); | ||
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| while (matcher.find()) { | ||
| String attributeName = matcher.group(1); | ||
| String attributeValue = matcher.group(3); | ||
| attributes.put(attributeName, attributeValue); | ||
| } | ||
| return attributes; | ||
| } | ||
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| private String inlineLinkTag(String linkTag, Map<String, String> attributesMap) { | ||
| return linkInliners.stream() | ||
| .map(i -> i.inline(attributesMap)) | ||
| .filter(Optional::isPresent) | ||
| .map(Optional::get) | ||
| .findFirst() | ||
| .orElse(linkTag); | ||
| } | ||
| } |
8 changes: 8 additions & 0 deletions
8
src/main/java/ch/sbb/polarion/extension/pdf/exporter/util/html/LinkInternalizer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| package ch.sbb.polarion.extension.pdf.exporter.util.html; | ||
|
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| import java.util.Map; | ||
| import java.util.Optional; | ||
|
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| public interface LinkInternalizer { | ||
| Optional<String> inline(Map<String, String> attributes); | ||
| } |
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