From aa6315acadb063117af548d903295c1f0bd137c0 Mon Sep 17 00:00:00 2001
From: Adrian Johnson <ajohnson@redneon.com>
Date: Sun, 26 Nov 2017 20:43:15 +1030
Subject: [PATCH 4/8] pdftocairo: add -fl, -ll options for specify page range
 using page labels

Bug #103912
---
 utils/pdftocairo.1  |  9 +++++++++
 utils/pdftocairo.cc | 32 +++++++++++++++++++++++++++++++-
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/utils/pdftocairo.1 b/utils/pdftocairo.1
index 158a21e5..bded4875 100644
--- a/utils/pdftocairo.1
+++ b/utils/pdftocairo.1
@@ -110,6 +110,12 @@ Specifies the first page to convert.
 .BI \-l " number"
 Specifies the last page to convert.
 .TP
+.BI \-fl " label"
+Specifies the first page label to convert.
+.TP
+.BI \-ll " label"
+Specifies the last page label to convert.
+.TP
 .B \-o
 Generates only the odd numbered pages.
 .TP
@@ -307,6 +313,9 @@ Error related to PDF permissions.
 4
 Error related to ICC profile.
 .TP
+5
+Invalid page label.
+.TP
 99
 Other error.
 .SH JPEG OPTIONS
diff --git a/utils/pdftocairo.cc b/utils/pdftocairo.cc
index 9c452421..1b53b330 100644
--- a/utils/pdftocairo.cc
+++ b/utils/pdftocairo.cc
@@ -87,8 +87,10 @@ static GBool printdlg = gFalse;
 static GBool svg = gFalse;
 static GBool tiff = gFalse;
 
-static int firstPage = 1;
+static int firstPage = 0;
 static int lastPage = 0;
+static GooString firstPageLabel;
+static GooString lastPageLabel;
 static GBool printOnlyOdd = gFalse;
 static GBool printOnlyEven = gFalse;
 static GBool singleFile = gFalse;
@@ -189,6 +191,10 @@ static const ArgDesc argDesc[] = {
    "first page to print"},
   {"-l",      argInt,      &lastPage,      0,
    "last page to print"},
+  {"-fl",      argGooString,      &firstPageLabel,     0,
+   "first page label to print"},
+  {"-ll",      argGooString,      &lastPageLabel,      0,
+   "last page label to print"},
   {"-o",      argFlag,      &printOnlyOdd, 0,
    "print only odd pages"},
   {"-e",      argFlag,      &printOnlyEven, 0,
@@ -995,6 +1001,16 @@ int main(int argc, char *argv[]) {
     fprintf(stderr, "Error: use only one of the output format options (-png, -jpeg, -ps, -eps, -pdf, -printdlg, -print, -svg).\n");
     exit(99);
   }
+
+  if (firstPage != 0 && firstPageLabel.getLength() > 0) {
+    fprintf(stderr, "Error: use only one of the '-f' and '-fp' options.\n");
+    exit(99);
+  }
+  if (lastPage != 0 && lastPageLabel.getLength() > 0) {
+    fprintf(stderr, "Error: use only one of the '-l' and '-lp' options.\n");
+    exit(99);
+  }
+
   if (png || jpeg || tiff)
     printing = gFalse;
   else
@@ -1183,6 +1199,20 @@ int main(int argc, char *argv[]) {
 #endif
 
   // get page range
+  if (firstPageLabel.getLength() > 0) {
+    if (!doc->getCatalog()->labelToIndex(&firstPageLabel, &firstPage)) {
+      fprintf(stderr, "Error: unknown page label \"%s\"\n", firstPageLabel.getCString());
+      exit(5);
+    }
+    firstPage++; // labelToIndex() uses 0 based page numbers
+  }
+  if (lastPageLabel.getLength() > 0) {
+    if (!doc->getCatalog()->labelToIndex(&lastPageLabel, &lastPage)) {
+      fprintf(stderr, "Error: unknown page label \"%s\"\n", lastPageLabel.getCString());
+      exit(5);
+    }
+    lastPage++; // labelToIndex() uses 0 based page numbers
+  }
   if (firstPage < 1)
     firstPage = 1;
   if (singleFile && lastPage < 1)
-- 
2.11.0