From 1812540b43fe5002261a5ebaf6420f9bd25a5bdd Mon Sep 17 00:00:00 2001
From: Adrian Johnson <ajohnson@redneon.com>
Date: Tue, 30 Aug 2016 22:26:28 +0930
Subject: [PATCH] pdfinfo: add -dests option to print named destinations

---
 configure.ac     |  1 +
 utils/pdfinfo.1  |  4 ++++
 utils/pdfinfo.cc | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c4cfc2c..9ce36e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,6 +85,7 @@ AC_ARG_ENABLE(build-type,
               enable_build_type=no)
 
 if test "x$GCC" = "xyes"; then
+    CXXFLAGS="-std=c++11 $CXXFLAGS"
     case "$enable_build_type" in
     relwithdebinfo)
         CFLAGS="-O2 -g $CFLAGS"
diff --git a/utils/pdfinfo.1 b/utils/pdfinfo.1
index 741219f..b699dff 100644
--- a/utils/pdfinfo.1
+++ b/utils/pdfinfo.1
@@ -113,6 +113,10 @@ Prints dates in ISO-8601 format (including the time zone).
 .B \-rawdates
 Prints the raw (undecoded) date strings, directly from the PDF file.
 .TP
+.B \-dests
+Print a list of all named destinations. If a page range is specified using "\-f" and "\-l", only
+destinations in the page range are listed.
+.TP
 .BI \-enc " encoding-name"
 Sets the encoding to use for text output. This defaults to "UTF-8".
 .TP
diff --git a/utils/pdfinfo.cc b/utils/pdfinfo.cc
index bffd67f..3114012 100644
--- a/utils/pdfinfo.cc
+++ b/utils/pdfinfo.cc
@@ -36,6 +36,7 @@
 #include <string.h>
 #include <time.h>
 #include <math.h>
+#include <map>
 #include "parseargs.h"
 #include "printencodings.h"
 #include "goo/GooString.h"
@@ -77,6 +78,7 @@ static GBool printHelp = gFalse;
 static GBool printEnc = gFalse;
 static GBool printStructure = gFalse;
 static GBool printStructureText = gFalse;
+static GBool printDests = gFalse;
 
 static const ArgDesc argDesc[] = {
   {"-f",      argInt,      &firstPage,        0,
@@ -97,6 +99,8 @@ static const ArgDesc argDesc[] = {
    "print the dates in ISO-8601 format"},
   {"-rawdates", argFlag,   &rawDates,         0,
    "print the undecoded date strings directly from the PDF file"},
+  {"-dests",     argFlag,  &printDests,       0,
+   "print all named destinations in the PDF"},
   {"-enc",    argString,   textEncName,    sizeof(textEncName),
    "output text encoding name"},
   {"-listenc",argFlag,     &printEnc,      0,
@@ -289,6 +293,44 @@ static void printStruct(const StructElement *element, unsigned indent) {
   }
 }
 
+struct RefCompare {
+  bool operator() (const Ref& lhs, const Ref& rhs) const {
+    return lhs.num < rhs.num;
+  }
+};
+
+struct GooStringCompare {
+  bool operator() (GooString* lhs, GooString* rhs) const {
+    return lhs->cmp(const_cast<GooString*>(rhs)) < 0;
+  }
+};
+
+static void printDestinations(PDFDoc *doc) {
+  std::map<Ref,std::map<GooString*,LinkDest*,GooStringCompare>, RefCompare > map;
+
+  int numDests = doc->getCatalog()->numDestNameTree();
+  for (int i = 0; i < numDests; i++) {
+    GooString *name = doc->getCatalog()->getDestNameTreeName(i);
+    LinkDest *dest = doc->getCatalog()->getDestNameTreeDest(i);
+    if (dest->isPageRef()) {
+      map[dest->getPageRef()].insert(std::make_pair(name, dest));
+    }
+  }
+
+  printf("Page    X    Y    Dest Name\n");
+  for (int i = firstPage; i <= lastPage; i++) {
+    Ref *ref = doc->getCatalog()->getPageRef(i);
+    auto pageDests = map.find(*ref);
+    if (pageDests != map.end()) {
+      for (auto& it: pageDests->second) {
+	printf("%4d", i);
+	printf(" %4.f %4.f", it.second->getLeft(), it.second->getBottom());
+	printf("    \"%s\"\n", it.first->getCString());
+      }
+    }
+  }
+}
+
 void printInfo(PDFDoc *doc, UnicodeMap *uMap, long long filesize, GBool multiPage) {
   Page *page;
   Object info;
@@ -552,7 +594,6 @@ int main(int argc, char *argv[]) {
   }
   if (lastPage == 0) {
     multiPage = gFalse;
-    lastPage = 1;
   } else {
     multiPage = gTrue;
   }
@@ -586,6 +627,8 @@ int main(int argc, char *argv[]) {
 	printStruct(structTree->getChild(i), 0);
       }
     }
+  } else if (printDests) {
+    printDestinations(doc);
   } else {
     // print info
     long long filesize = 0;
@@ -600,6 +643,10 @@ int main(int argc, char *argv[]) {
       filesize = Gftell(f);
       fclose(f);
     }
+
+    if (multiPage == gFalse)
+      lastPage = 1;
+
     printInfo(doc, uMap, filesize, multiPage);
   }
   exitCode = 0;
-- 
2.1.4