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authorJakob Heher <jakob.heher@iaik.tugraz.at>2022-08-08 13:32:30 +0200
committerJakob Heher <jakob.heher@iaik.tugraz.at>2022-08-08 13:32:30 +0200
commit3679f37f129b16daadb490d6987fdd038b096bfc (patch)
tree960193629b0899d90297d5f918f337024fad1db5 /pdf-over-signer/src
parent84a9465b14154f3e56a6b772d21e70f1c60bdf47 (diff)
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cached asynchronous pdf-as placeholders
Diffstat (limited to 'pdf-over-signer/src')
-rw-r--r--pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignatureParameter.java2
-rw-r--r--pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignaturePlaceholder.java70
2 files changed, 71 insertions, 1 deletions
diff --git a/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignatureParameter.java b/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignatureParameter.java
index 4356f1e0..78dda185 100644
--- a/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignatureParameter.java
+++ b/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignatureParameter.java
@@ -83,7 +83,7 @@ public class PdfAs4SignatureParameter {
/** The signature profile in use */
public Profile signatureProfile = Profile.getDefaultProfile();
- public Image getPlaceholder() {
+ Image getPlaceholder() {
String sigProfile = getPdfAsSignatureProfileId();
String sigEmblem = (this.emblem == null ? null : this.emblem.getCachedFileName());
diff --git a/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignaturePlaceholder.java b/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignaturePlaceholder.java
new file mode 100644
index 00000000..b944bf24
--- /dev/null
+++ b/pdf-over-signer/src/main/java/at/asit/pdfover/signer/pdfas/PdfAs4SignaturePlaceholder.java
@@ -0,0 +1,70 @@
+package at.asit.pdfover.signer.pdfas;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.TreeMap;
+import java.util.function.Consumer;
+
+import at.asit.pdfover.commons.utils.ImageUtil;
+
+/**
+ * caches placeholders for signature parameters (placeholder generation is pretty slow)
+ */
+public final class PdfAs4SignaturePlaceholder implements Runnable {
+ private static TreeMap<PdfAs4SignatureParameter, PdfAs4SignaturePlaceholder> cache = new TreeMap<>(
+ Comparator
+ .comparing(PdfAs4SignatureParameter::getPdfAsSignatureProfileId)
+ .thenComparing((p) -> { return (p.emblem != null) ? p.emblem.getOriginalFileHash() : ""; })
+ .thenComparing((p) -> { return p.signatureNote; }, Comparator.nullsFirst(String::compareTo))
+ );
+
+ /**
+ * request a placeholder for the specified parameter asynchronously
+ * @param callback the callback to be invoked on completion (may also be invoked before this function returns!)
+ */
+ public static void For(PdfAs4SignatureParameter param, Consumer<PdfAs4SignaturePlaceholder> callback) {
+ synchronized(cache) {
+ cache.computeIfAbsent(param, (p) -> new PdfAs4SignaturePlaceholder(p)).AddCallback(callback);
+ }
+ }
+
+ private final PdfAs4SignatureParameter param;
+ private PdfAs4SignaturePlaceholder(PdfAs4SignatureParameter param) {
+ this.param = param;
+ new Thread(this).start();
+ }
+
+ private java.awt.image.BufferedImage awtImageData;
+ /** AWT image data for the placeholder */
+ public java.awt.image.BufferedImage getAWTImage() { return this.awtImageData; }
+ private org.eclipse.swt.graphics.ImageData swtImageData;
+ /** SWT image data for the placeholder */
+ public org.eclipse.swt.graphics.ImageData getSWTImage() { return this.swtImageData; }
+
+ private ArrayList<Consumer<PdfAs4SignaturePlaceholder>> callbacks = new ArrayList<>();
+ private void AddCallback(Consumer<PdfAs4SignaturePlaceholder> c) {
+ synchronized (this) {
+ if (this.callbacks != null)
+ {
+ this.callbacks.add(c);
+ return;
+ } /* else... */
+ }
+ /* ... else, not synchronized */
+ c.accept(this);
+ }
+
+
+ @Override
+ public void run() {
+ this.awtImageData = (java.awt.image.BufferedImage) this.param.getPlaceholder();
+ this.swtImageData = ImageUtil.convertToSWT(this.awtImageData);
+ ArrayList<Consumer<PdfAs4SignaturePlaceholder>> _callbacks;
+ synchronized (this) {
+ _callbacks = this.callbacks;
+ this.callbacks = null;
+ }
+ _callbacks.forEach((c) -> c.accept(this));
+ }
+
+}