Don't use handleWarning, which is being reverted

Jay Berkenbilt
1 parent aa89476e
Showing 6 changed files with 21 additions and 31 deletions
libqpdf/QPDFAcroFormDocumentHelper.cc
libqpdf/QPDFObjectHandle.cc
libqpdf/QPDFPageObjectHelper.cc
libqpdf/ResourceFinder.cc
libqpdf/qpdf/ResourceFinder.hh
qpdf/qtest/qpdf/split-tokens-split.out
@@ -742,8 +742,9 @@ QPDFAcroFormDocumentHelper::adjustDefaultAppearances(
         &this->qpdf, DA.getUTF8Value());
     try
     {
+        auto nwarnings = this->qpdf.numWarnings();
         da_stream.parseAsContents(&rf);
-        if (rf.sawBad())
+        if (this->qpdf.numWarnings() > nwarnings)
         {
             QTC::TC("qpdf", "QPDFAcroFormDocumentHelper /DA parse error");
         }
@@ -858,8 +859,9 @@ QPDFAcroFormDocumentHelper::adjustAppearanceStream(
     ResourceFinder rf;
     try
     {
+        auto nwarnings = this->qpdf.numWarnings();
         stream.parseAsContents(&rf);
-        if (rf.sawBad())
+        if (this->qpdf.numWarnings() > nwarnings)
         {
             QTC::TC("qpdf", "QPDFAcroFormDocumentHelper AP parse error");
         }
@@ -1949,15 +1949,10 @@ QPDFObjectHandle::parseContentStream_internal(
     pipeContentStreams(&buf, description, all_description);
     PointerHolder<Buffer> stream_data = buf.getBuffer();
     callbacks->contentSize(stream_data->getSize());
-    QPDF* context = getOwningQPDF();
-    if ((! context) && isArray() && (getArrayNItems() > 0))
-    {
-        context = getArrayItem(0).getOwningQPDF();
-    }
     try
     {
         parseContentStream_data(stream_data, all_description,
-                                callbacks, context);
+                                callbacks, getOwningQPDF());
     }
     catch (TerminateParsing&)
     {
@@ -684,24 +684,28 @@ QPDFPageObjectHelper::removeUnreferencedResourcesHelper(
     ResourceFinder rf;
     try
     {
+        auto q = ph.oh.getOwningQPDF();
+        size_t before_nw = (q ? q->numWarnings() : 0);
         ph.parseContents(&rf);
+        size_t after_nw = (q ? q->numWarnings() : 0);
+        if (after_nw > before_nw)
+        {
+            ph.oh.warnIfPossible(
+                "Bad token found while scanning content stream; "
+                "not attempting to remove unreferenced objects from"
+                " this object");
+            return false;
+        }
     }
     catch (std::exception& e)
     {
+        QTC::TC("qpdf", "QPDFPageObjectHelper bad token finding names");
         ph.oh.warnIfPossible(
             std::string("Unable to parse content stream: ") + e.what() +
             "; not attempting to remove unreferenced objects"
             " from this object");
         return false;
     }
-    if (rf.sawBad())
-    {
-        QTC::TC("qpdf", "QPDFPageObjectHelper bad token finding names");
-        ph.oh.warnIfPossible(
-            "Bad token found while scanning content stream; "
-            "not attempting to remove unreferenced objects from this object");
-        return false;
-    }
  
     // We will walk through /Font and /XObject dictionaries, removing
     // any resources that are not referenced. We must make copies of
 #include <qpdf/ResourceFinder.hh>
  
 ResourceFinder::ResourceFinder() :
-    last_name_offset(0),
-    saw_bad(false)
+    last_name_offset(0)
 {
 }
  
@@ -45,9 +44,8 @@ ResourceFinder::handleObject(QPDFObjectHandle obj, size_t offset, size_t)
 }
  
 void
-ResourceFinder::handleWarning()
+ResourceFinder::handleEOF()
 {
-    this->saw_bad = true;
 }
  
 std::set<std::string> const&
@@ -61,9 +59,3 @@ ResourceFinder::getNamesByResourceType() const
 {
     return this->names_by_resource_type;
 }
-
-bool
-ResourceFinder::sawBad() const
-{
-    return this->saw_bad;
-}
@@ -9,12 +9,11 @@ class ResourceFinder: public QPDFObjectHandle::ParserCallbacks
     ResourceFinder();
     virtual ~ResourceFinder() = default;
     virtual void handleObject(QPDFObjectHandle, size_t, size_t) override;
-    virtual void handleWarning() override;
+    virtual void handleEOF() override;
     std::set<std::string> const& getNames() const;
     std::map<std::string,
              std::map<std::string,
                       std::set<size_t>>> const& getNamesByResourceType() const;
-    bool sawBad() const;
  
   private:
     std::string last_name;
@@ -23,7 +22,6 @@ class ResourceFinder: public QPDFObjectHandle::ParserCallbacks
     std::map<std::string,
              std::map<std::string,
                       std::set<size_t>>> names_by_resource_type;
-    bool saw_bad;
 };
  
 #endif // RESOURCEFINDER_HH
-WARNING: page object 3 0 stream 5 0, stream 7 0, stream 9 0, stream 11 0 (content, offset 375): null character not allowed in name token
-WARNING: split-tokens.pdf, object 3 0 at offset 181: Bad token found while scanning content stream; not attempting to remove unreferenced objects from this object
+WARNING: split-tokens.pdf, object 3 0 at offset 181: Unable to parse content stream: page object 3 0 stream 5 0, stream 7 0, stream 9 0, stream 11 0 (content, offset 375): null character not allowed in name token; not attempting to remove unreferenced objects from this object
 WARNING: empty PDF: content normalization encountered bad tokens
 WARNING: empty PDF: normalized content ended with a bad token; you may be able to resolve this by coalescing content streams in combination with normalizing content. From the command line, specify --coalesce-contents
 WARNING: empty PDF: Resulting stream data may be corrupted but is may still useful for manual inspection. For more information on this warning, search for content normalization in the manual.