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-rw-r--r--src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java41
1 files changed, 37 insertions, 4 deletions
diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java
index 07f2328..19a32ac 100644
--- a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java
+++ b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java
@@ -3,7 +3,10 @@ package at.knowcenter.wag.egov.egiz.pdf;
import org.apache.log4j.Logger;
import at.gv.egiz.pdfas.exceptions.ErrorCode;
+import at.gv.egiz.pdfas.framework.signator.SignatorInformation;
+import at.knowcenter.wag.egov.egiz.exceptions.InvalidIDException;
import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;
+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;
import com.lowagie.text.pdf.PdfArray;
import com.lowagie.text.pdf.PdfContentByte;
@@ -15,17 +18,21 @@ import com.lowagie.text.pdf.PdfNumber;
import com.lowagie.text.pdf.PdfObject;
import com.lowagie.text.pdf.PdfStamper;
import com.lowagie.text.pdf.PdfStamperImp;
+import com.lowagie.text.pdf.PdfString;
/**
* Helper class for writing the structure hierarchy of the signature elements.
* Everything is written with the PdfObject low level API because there is no better support.
* The structured content is only written for structured (==tagged) input documents. The methods have to be called in the
- * defined order. The object cannot be reused for several signatures.
+ * defined order. The object cannot be reused for several signatures.<br>
+ * See pdf spec "Logical Structure" for details.
* @author exthex
*
*/
public class StructContentHelper {
private static Logger logger = Logger.getLogger(StructContentHelper.class);
+
+ private final static String ALT_TEXT_KEY = "sigBlockAltText";
private int nextMcid = 0;
private boolean isTagged = false;
@@ -49,8 +56,7 @@ public class StructContentHelper {
* Create and write structured content for signature block
* @throws PresentableException
*/
- void buildMainStructData() throws PresentableException {
- // TODO titel/alttext woher?
+ void buildMainStructData(SignatureObject so, SignatorInformation si) throws PresentableException {
try {
@@ -137,7 +143,7 @@ public class StructContentHelper {
newStruct.put(PdfName.TYPE, new PdfName("StructElem"));
newStruct.put(PdfName.PG, page.getIndRef());
- //newStruct.put(PdfName.ALT, new PdfString("meine feiner signaturblock alttext"));
+ newStruct.put(PdfName.ALT, new PdfString(createAltText(so, si)));
newStruct.put(PdfName.K, new PdfNumber(nextMcid));
@@ -273,5 +279,32 @@ public class StructContentHelper {
private PdfDictionary getStructTreeRoot() {
return stamper.getReader().getCatalog().getAsDict(PdfName.STRUCTTREEROOT);
}
+
+ private String createAltText(SignatureObject so, SignatorInformation si) {
+ String profileId = so.getSignatureTypeDefinition().getType();
+ String res = getAltText(profileId); // ask config for alt text
+ if (res == null) {
+ // make default alt text
+ StringBuilder sb = new StringBuilder("PDF-AS Signatur");
+
+ try {
+ if (so != null && so.getKZ() != null) {
+ sb.append(". ").append(so.getKZ().toString());
+ } else if (si != null) {
+ sb.append(". ").append(si.getSignSignatureObject().kz);
+ }
+ } catch (InvalidIDException e) {
+ logger.debug("error reading signature method for alt text string");
+ }
+ sb.append(". ").append(profileId);
+ res = sb.toString();
+ }
+ return res;
+ }
+
+ public static String getAltText(String sigProfile) {
+ return AdobeSignatureHelper.getDefaultableConfigProperty(sigProfile, ALT_TEXT_KEY, null);
+ }
+
}