Merge pull request #916 from m-holger/job

Split QPDFJob::run into createQPDF and writeQPDF

Merge pull request #916 from m-holger/job
Split QPDFJob::run into createQPDF and writeQPDF
Jay Berkenbilt · GitHub
2 parents b27be3ed 99231c43
Showing 10 changed files with 1106 additions and 28 deletions
CMakeLists.txt
examples/CMakeLists.txt
examples/qpdfjob-remove-annotations.cc
examples/qtest/qpdfjob-remove-annotations.test
examples/qtest/qpdfjob-remove-annotations/annotations-out.pdf
examples/qtest/qpdfjob-remove-annotations/annotations.pdf
include/qpdf/DLL.h
include/qpdf/QPDFJob.hh
libqpdf/QPDFJob.cc
manual/conf.py
@@ -5,7 +5,7 @@ cmake_minimum_required(VERSION 3.16)
 # the project line. When updating the version, check make_dist for all
 # the places it has to be updated.
 project(qpdf
-  VERSION 11.3.1
+  VERSION 11.4.0
   LANGUAGES C CXX)
  
 # Enable correct rpath handling for MacOSX
@@ -15,6 +15,7 @@ set(EXAMPLE_CXX_PROGRAMS
   pdf-set-form-values
   pdf-split-pages
   qpdf-job
+  qpdfjob-remove-annotations
   qpdfjob-save-attachment)
 set(EXAMPLE_C_PROGRAMS
   pdf-c-objects
+#include <qpdf/QPDFJob.hh>
+#include <qpdf/QPDFUsage.hh>
+#include <qpdf/QUtil.hh>
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+
+// This example demonstrates how we can use the QPDFJob createQPDF and writeQPDF
+// methods to add custom transformations to the output produced by QPDFJob runs.
+// The example is a full copy of the qpdf program modified to allways remove all
+// annotations from the final output.
+
+static char const* whoami = 0;
+
+static void
+usageExit(std::string const& msg)
+{
+    std::cerr << std::endl
+              << whoami << ": " << msg << std::endl
+              << std::endl
+              << "For help:" << std::endl
+              << "  " << whoami << " --help=usage       usage information"
+              << std::endl
+              << "  " << whoami << " --help=topic       help on a topic"
+              << std::endl
+              << "  " << whoami << " --help=--option    help on an option"
+              << std::endl
+              << "  " << whoami
+              << " --help             general help and a topic list"
+              << std::endl
+              << std::endl;
+    exit(QPDFJob::EXIT_ERROR);
+}
+
+int
+realmain(int argc, char* argv[])
+{
+    whoami = QUtil::getWhoami(argv[0]);
+    QUtil::setLineBuf(stdout);
+
+    QPDFJob j;
+    try {
+        // See "HOW TO ADD A COMMAND-LINE ARGUMENT" in README-maintainer.
+        j.initializeFromArgv(argv);
+        auto qpdf_sp = j.createQPDF();
+        auto& pdf = *qpdf_sp;
+        for (auto page: pdf.getAllPages()) {
+            page.replaceKey("/Annots", "null"_qpdf);
+        }
+        j.writeQPDF(pdf);
+    } catch (QPDFUsage& e) {
+        usageExit(e.what());
+    } catch (std::exception& e) {
+        std::cerr << whoami << ": " << e.what() << std::endl;
+        return QPDFJob::EXIT_ERROR;
+    }
+    return j.getExitCode();
+}
+
+#ifdef WINDOWS_WMAIN
+
+extern "C" int
+wmain(int argc, wchar_t* argv[])
+{
+    return QUtil::call_main_from_wmain(argc, argv, realmain);
+}
+
+#else
+
+int
+main(int argc, char* argv[])
+{
+    return realmain(argc, argv);
+}
+
+#endif
+#!/usr/bin/env perl
+require 5.008;
+use warnings;
+use strict;
+
+chdir("qpdfjob-remove-annotations");
+
+require TestDriver;
+
+my $td = new TestDriver('qpdfjob-remove-annotations');
+
+cleanup();
+
+$td->runtest("remove-annotations",
+             {$td->COMMAND => "qpdfjob-remove-annotations --static-id annotations.pdf out.pdf"},
+             {$td->STRING => "", $td->EXIT_STATUS => 0});
+$td->runtest("compare files",
+             {$td->FILE => "out.pdf"},
+             {$td->FILE => "annotations-out.pdf"});
+
+cleanup();
+
+$td->report(2);
+
+sub cleanup
+{
+    unlink("out.pdf");
+}
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@@ -25,9 +25,9 @@
  
 /* The first version of qpdf to include the version constants is 10.6.0. */
 #define QPDF_MAJOR_VERSION 11
-#define QPDF_MINOR_VERSION 3
-#define QPDF_PATCH_VERSION 1
-#define QPDF_VERSION "11.3.1"
+#define QPDF_MINOR_VERSION 4
+#define QPDF_PATCH_VERSION 0
+#define QPDF_VERSION "11.4.0"
  
 /*
  * This file defines symbols that control the which functions,
@@ -397,6 +397,21 @@ class QPDFJob
     QPDF_DLL
     void run();
  
+    // The following two methods allow a job to be run in two stages - creation
+    // of a QPDF object and writing of the QPDF object. This allows the QPDF
+    // object to be modified prior to writing it out. See
+    // examples/qpdfjob-remove-annotations for an illustration of its use.
+
+    // Run the first stage of the job. Return a nullptr if the configuration is
+    // not valid.
+    QPDF_DLL
+    std::unique_ptr<QPDF> createQPDF();
+
+    // Run the second stage of the job. Do nothing if a nullptr is passed as
+    // parameter.
+    QPDF_DLL
+    void writeQPDF(QPDF& qpdf);
+
     // CHECK STATUS -- these methods provide information known after
     // run() is called.
  
@@ -474,7 +489,7 @@ class QPDFJob
         std::string to_nr;
         std::string from_nr;
         std::string repeat_nr;
-        std::shared_ptr<QPDF> pdf;
+        std::unique_ptr<QPDF> pdf;
         std::vector<int> to_pagenos;
         std::vector<int> from_pagenos;
         std::vector<int> repeat_pagenos;
@@ -490,25 +505,25 @@ class QPDFJob
  
     // Basic file processing
     void processFile(
-        std::shared_ptr<QPDF>&,
+        std::unique_ptr<QPDF>&,
         char const* filename,
         char const* password,
         bool used_for_input,
         bool main_input);
     void processInputSource(
-        std::shared_ptr<QPDF>&,
+        std::unique_ptr<QPDF>&,
         std::shared_ptr<InputSource> is,
         char const* password,
         bool used_for_input);
     void doProcess(
-        std::shared_ptr<QPDF>&,
+        std::unique_ptr<QPDF>&,
         std::function<void(QPDF*, char const*)> fn,
         char const* password,
         bool empty,
         bool used_for_input,
         bool main_input);
     void doProcessOnce(
-        std::shared_ptr<QPDF>&,
+        std::unique_ptr<QPDF>&,
         std::function<void(QPDF*, char const*)> fn,
         char const* password,
         bool empty,
@@ -518,7 +533,7 @@ class QPDFJob
     // Transformations
     void setQPDFOptions(QPDF& pdf);
     void
-    handlePageSpecs(QPDF& pdf, std::vector<std::shared_ptr<QPDF>>& page_heap);
+    handlePageSpecs(QPDF& pdf, std::vector<std::unique_ptr<QPDF>>& page_heap);
     bool shouldRemoveUnreferencedResources(QPDF& pdf);
     void handleRotations(QPDF& pdf);
     void
@@ -447,11 +447,11 @@ QPDFJob::parseNumrange(char const* range, int max)
     return std::vector<int>();
 }
  
-void
-QPDFJob::run()
+std::unique_ptr<QPDF>
+QPDFJob::createQPDF()
 {
     checkConfiguration();
-    std::shared_ptr<QPDF> pdf_sp;
+    std::unique_ptr<QPDF> pdf_sp;
     try {
         processFile(pdf_sp, m->infilename.get(), m->password.get(), true, true);
     } catch (QPDFExc& e) {
@@ -461,12 +461,12 @@ QPDFJob::run()
             if (m->check_is_encrypted || m->check_requires_password) {
                 this->m->encryption_status =
                     qpdf_es_encrypted | qpdf_es_password_incorrect;
-                return;
+                return nullptr;
             }
             if (m->show_encryption && pdf_sp) {
                 this->m->log->info("Incorrect password supplied\n");
                 showEncryption(*pdf_sp);
-                return;
+                return nullptr;
             }
         }
         throw e;
@@ -477,7 +477,7 @@ QPDFJob::run()
     }
  
     if (m->check_is_encrypted || m->check_requires_password) {
-        return;
+        return nullptr;
     }
  
     // If we are updating from JSON, this has to be done first before
@@ -486,7 +486,7 @@ QPDFJob::run()
         pdf.updateFromJSON(this->m->update_from_json);
     }
  
-    std::vector<std::shared_ptr<QPDF>> page_heap;
+    std::vector<std::unique_ptr<QPDF>> page_heap;
     if (!m->page_specs.empty()) {
         handlePageSpecs(pdf, page_heap);
     }
@@ -495,7 +495,12 @@ QPDFJob::run()
     }
     handleUnderOverlay(pdf);
     handleTransformations(pdf);
+    return pdf_sp;
+}
  
+void
+QPDFJob::writeQPDF(QPDF& pdf)
+{
     if (!createsOutput()) {
         doInspection(pdf);
     } else if (m->split_pages) {
@@ -527,6 +532,15 @@ QPDFJob::run()
     }
 }
  
+void
+QPDFJob::run()
+{
+    auto pdf = createQPDF();
+    if (pdf) {
+        writeQPDF(*pdf);
+    }
+}
+
 bool
 QPDFJob::hasWarnings() const
 {
@@ -1868,14 +1882,14 @@ QPDFJob::doInspection(QPDF&amp; pdf)
  
 void
 QPDFJob::doProcessOnce(
-    std::shared_ptr<QPDF>& pdf,
+    std::unique_ptr<QPDF>& pdf,
     std::function<void(QPDF*, char const*)> fn,
     char const* password,
     bool empty,
     bool used_for_input,
     bool main_input)
 {
-    pdf = QPDF::create();
+    pdf = std::make_unique<QPDF>();
     setQPDFOptions(*pdf);
     if (empty) {
         pdf->emptyPDF();
@@ -1892,7 +1906,7 @@ QPDFJob::doProcessOnce(
  
 void
 QPDFJob::doProcess(
-    std::shared_ptr<QPDF>& pdf,
+    std::unique_ptr<QPDF>& pdf,
     std::function<void(QPDF*, char const*)> fn,
     char const* password,
     bool empty,
@@ -1976,7 +1990,7 @@ QPDFJob::doProcess(
  
 void
 QPDFJob::processFile(
-    std::shared_ptr<QPDF>& pdf,
+    std::unique_ptr<QPDF>& pdf,
     char const* filename,
     char const* password,
     bool used_for_input,
@@ -1996,7 +2010,7 @@ QPDFJob::processFile(
  
 void
 QPDFJob::processInputSource(
-    std::shared_ptr<QPDF>& pdf,
+    std::unique_ptr<QPDF>& pdf,
     std::shared_ptr<InputSource> is,
     char const* password,
     bool used_for_input)
@@ -2278,7 +2292,7 @@ QPDFJob::copyAttachments(QPDF&amp; pdf)
             v << prefix << ": copying attachments from " << to_copy.path
               << "\n";
         });
-        std::shared_ptr<QPDF> other;
+        std::unique_ptr<QPDF> other;
         processFile(
             other,
             to_copy.path.c_str(),
@@ -2540,7 +2554,7 @@ added_page(QPDF&amp; pdf, QPDFPageObjectHelper page)
  
 void
 QPDFJob::handlePageSpecs(
-    QPDF& pdf, std::vector<std::shared_ptr<QPDF>>& page_heap)
+    QPDF& pdf, std::vector<std::unique_ptr<QPDF>>& page_heap)
 {
     // Parse all page specifications and translate them into lists of
     // actual pages.
@@ -2612,10 +2626,10 @@ QPDFJob::handlePageSpecs(
                     new FileInputSource(page_spec.filename.c_str());
                 is = std::shared_ptr<InputSource>(fis);
             }
-            std::shared_ptr<QPDF> qpdf_sp;
+            std::unique_ptr<QPDF> qpdf_sp;
             processInputSource(qpdf_sp, is, password, true);
-            page_heap.push_back(qpdf_sp);
             page_spec_qpdfs[page_spec.filename] = qpdf_sp.get();
+            page_heap.push_back(std::move(qpdf_sp));
             if (cis) {
                 cis->stayOpen(false);
                 page_spec_cfis[page_spec.filename] = cis;
@@ -3116,7 +3130,7 @@ QPDFJob::setWriterOptions(QPDF&amp; pdf, QPDFWriter&amp; w)
         w.setSuppressOriginalObjectIDs(true);
     }
     if (m->copy_encryption) {
-        std::shared_ptr<QPDF> encryption_pdf;
+        std::unique_ptr<QPDF> encryption_pdf;
         processFile(
             encryption_pdf,
             m->encryption_file.c_str(),
@@ -16,7 +16,7 @@ project = &#39;QPDF&#39;
 copyright = '2005-2023, Jay Berkenbilt'
 author = 'Jay Berkenbilt'
 # make_dist and the CI build lexically find the release version from this file.
-release = '11.3.1'
+release = '11.4.0'
 version = release
 extensions = [
     'sphinx_rtd_theme',