Implement helper class for interactive forms

1 files changed, 23 insertions, 0 deletions

diff --git a/libqpdf/QPDFPageObjectHelper.cc b/libqpdf/QPDFPageObjectHelper.cc
index b16d8751..47bc2117 100644
--- a/libqpdf/QPDFPageObjectHelper.cc
+++ b/libqpdf/QPDFPageObjectHelper.cc
@@ -19,6 +19,29 @@ QPDFPageObjectHelper::getPageImages()
     return this->oh.getPageImages();
 }
 
+std::vector<QPDFAnnotationObjectHelper>
+QPDFPageObjectHelper::getAnnotations(std::string const& only_subtype)
+{
+    std::vector<QPDFAnnotationObjectHelper> result;
+    QPDFObjectHandle annots = this->oh.getKey("/Annots");
+    if (annots.isArray())
+    {
+        size_t nannots = annots.getArrayNItems();
+        for (size_t i = 0; i < nannots; ++i)
+        {
+            QPDFObjectHandle annot = annots.getArrayItem(i);
+            if (only_subtype.empty() ||
+                (annot.isDictionary() &&
+                 annot.getKey("/Subtype").isName() &&
+                 (only_subtype == annot.getKey("/Subtype").getName())))
+            {
+                result.push_back(QPDFAnnotationObjectHelper(annot));
+            }
+        }
+    }
+    return result;
+}
+
 std::vector<QPDFObjectHandle>
 QPDFPageObjectHelper::getPageContents()
 {