mirror of https://github.com/qpdf/qpdf.git
609 lines
18 KiB
C++
609 lines
18 KiB
C++
// Copyright (c) 2005-2021 Jay Berkenbilt
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//
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// This file is part of qpdf.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms
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// of version 2.0 of the Artistic License. At your option, you may
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// continue to consider qpdf to be licensed under those terms. Please
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// see the manual for additional information.
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#ifndef QPDFJOB_HH
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#define QPDFJOB_HH
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#include <qpdf/DLL.h>
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#include <qpdf/Constants.h>
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#include <qpdf/QPDF.hh>
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#include <qpdf/QPDFPageObjectHelper.hh>
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#include <memory>
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#include <string>
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#include <list>
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#include <vector>
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#include <set>
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#include <map>
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#include <iostream>
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#include <functional>
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#include <memory>
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#include <stdexcept>
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class QPDFWriter;
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class QPDFJob
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{
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public:
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// QPDFUsage is thrown if there are any usage-like errors when
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// calling Config methods.
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QPDF_DLL
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QPDFJob();
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// SETUP FUNCTIONS
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// Initialize a QPDFJob object from argv. The progname_env
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// argument is the name of an environment variable which, if set,
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// overrides the name of the executable for purposes of generating
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// the --completion options. See QPDFArgParser for details. If a
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// null pointer is passed in, the default value of
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// "QPDF_EXECUTABLE" is used. This is used by the QPDF cli, which
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// just initializes a QPDFJob from argv, calls run(), and handles
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// errors and exit status issues. You can perform much of the cli
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// functionality programmatically in this way rather than using
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// the regular API. This is exposed in the C API, which makes it
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// easier to get certain high-level qpdf functionality from other
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// languages. If there are any command-line errors, this method
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// will throw QPDFArgParser::Usage which is derived from
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// std::runtime_error. Other exceptions may be thrown in some
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// cases. Note that argc, and argv should be UTF-8 encoded. If you
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// are calling this from a Windows Unicode-aware main (wmain), see
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// QUtil::call_main_from_wmain for information about converting
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// arguments to UTF-8. This method will mutate arguments that are
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// passed to it.
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QPDF_DLL
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void initializeFromArgv(int argc, char* argv[],
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char const* progname_env = nullptr);
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QPDF_DLL
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void initializeFromJson(std::string const& json);
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// Set name that is used to prefix verbose messages, progress
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// messages, and other things that the library writes to output
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// and error streams on the caller's behalf. Defaults to "qpdf".
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QPDF_DLL
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void setMessagePrefix(std::string const&);
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// Override streams that errors and output go to. Defaults are
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// std::cout and std::cerr. Pass nullptr to use the default.
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QPDF_DLL
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void setOutputStreams(std::ostream* out_stream, std::ostream* err_stream);
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// Check to make sure no contradictory options have been
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// specified. This is called automatically after initializing from
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// argv or json and is also called by run, but you can call it
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// manually as well. It throws a Usage exception if there are any
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// errors.
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QPDF_DLL
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void checkConfiguration();
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// Returns true if output is created by the specified job.
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QPDF_DLL
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bool createsOutput() const;
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// SEE BELOW FOR MORE PUBLIC METHODS AND CLASSES
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private:
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// These structures are private but we need to define them before
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// the public Config classes.
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struct CopyAttachmentFrom
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{
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std::string path;
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std::string password;
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std::string prefix;
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};
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struct AddAttachment
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{
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AddAttachment() :
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replace(false)
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{
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}
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std::string path;
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std::string key;
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std::string filename;
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std::string creationdate;
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std::string moddate;
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std::string mimetype;
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std::string description;
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bool replace;
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};
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struct PageSpec
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{
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PageSpec(std::string const& filename,
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char const* password,
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std::string const& range);
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std::string filename;
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std::shared_ptr<char> password;
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std::string range;
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};
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public:
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// CONFIGURATION
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// Configuration classes are implemented in QPDFJob_config.cc.
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// The config() method returns a shared pointer to a Config
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// object. The Config object contains methods that correspond with
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// qpdf command-line arguments. You can use a fluent interface to
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// configure a QPDFJob object that would do exactly the same thing
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// as a specific qpdf command. The example pdf-job.cc contains an
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// example of this usage. You can also use initializeFromJson or
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// initializeFromArgv to initialize a QPDFJob object.
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// Notes about the Config methods:
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//
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// * Most of the method declarations are automatically generated
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// in header files that are included within the class
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// definitions. They correspond in predictable ways to the
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// command-line arguments and are generated from the same code
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// that generates the command-line argument parsing code.
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//
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// * Methods return pointers, rather than references, to
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// configuration objects. References might feel more familiar to
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// users of fluent interfaces, so why do we use pointers? The
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// main methods that create them return smart pointers so that
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// users can initialize them when needed, which you can't do
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// with references. Returning pointers instead of references
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// makes for a more uniform interface.
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class Config;
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class AttConfig
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{
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friend class QPDFJob;
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friend class Config;
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public:
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QPDF_DLL
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Config* endAddAttachment();
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QPDF_DLL
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AttConfig* path(char const* parameter);
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# include <qpdf/auto_job_c_att.hh>
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private:
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AttConfig(Config*);
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AttConfig(AttConfig const&) = delete;
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Config* config;
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AddAttachment att;
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};
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class CopyAttConfig
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{
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friend class QPDFJob;
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friend class Config;
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public:
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QPDF_DLL
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Config* endCopyAttachmentsFrom();
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QPDF_DLL
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CopyAttConfig* path(char const* parameter);
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# include <qpdf/auto_job_c_copy_att.hh>
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private:
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CopyAttConfig(Config*);
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CopyAttConfig(CopyAttConfig const&) = delete;
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Config* config;
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CopyAttachmentFrom caf;
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};
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class PagesConfig
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{
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friend class QPDFJob;
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friend class Config;
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public:
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QPDF_DLL
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Config* endPages();
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QPDF_DLL
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PagesConfig* pageSpec(std::string const& filename,
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std::string const& range,
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char const* password = nullptr);
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# include <qpdf/auto_job_c_pages.hh>
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private:
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PagesConfig(Config*);
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PagesConfig(PagesConfig const&) = delete;
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Config* config;
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};
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class UOConfig
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{
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friend class QPDFJob;
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friend class Config;
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public:
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QPDF_DLL
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Config* endUnderlayOverlay();
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QPDF_DLL
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UOConfig* path(char const* parameter);
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# include <qpdf/auto_job_c_uo.hh>
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private:
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UOConfig(Config*);
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UOConfig(PagesConfig const&) = delete;
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Config* config;
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};
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class EncConfig
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{
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friend class QPDFJob;
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friend class Config;
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public:
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QPDF_DLL
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Config* endEncrypt();
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QPDF_DLL
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EncConfig* path(char const* parameter);
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# include <qpdf/auto_job_c_enc.hh>
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private:
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EncConfig(Config*);
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EncConfig(PagesConfig const&) = delete;
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Config* config;
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};
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class Config
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{
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friend class QPDFJob;
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public:
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QPDF_DLL
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Config* inputFile(char const* filename);
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QPDF_DLL
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Config* emptyInput();
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QPDF_DLL
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Config* outputFile(char const* filename);
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QPDF_DLL
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Config* replaceInput();
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QPDF_DLL
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std::shared_ptr<CopyAttConfig> copyAttachmentsFrom();
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QPDF_DLL
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std::shared_ptr<AttConfig> addAttachment();
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QPDF_DLL
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std::shared_ptr<PagesConfig> pages();
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QPDF_DLL
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std::shared_ptr<UOConfig> overlay();
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QPDF_DLL
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std::shared_ptr<UOConfig> underlay();
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QPDF_DLL
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std::shared_ptr<EncConfig> encrypt(
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int keylen,
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std::string const& user_password,
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std::string const& owner_password);
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# include <qpdf/auto_job_c_main.hh>
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private:
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Config() = delete;
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Config(Config const&) = delete;
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Config(QPDFJob& job) :
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o(job)
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{
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}
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QPDFJob& o;
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};
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friend class Config;
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// Return a top-level configuration item. See CONFIGURATION above
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// for details. If an invalid configuration is created (such as
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// supplying contradictory options, omitting an input file, etc.),
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// QPDFUsage is thrown.
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QPDF_DLL
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std::shared_ptr<Config> config();
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// Options for helping the qpdf CLI use the correct edit code and
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// properly report warnings.
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QPDF_DLL
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bool suppressWarnings();
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QPDF_DLL
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bool warningsExitZero();
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QPDF_DLL
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bool checkRequiresPassword();
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QPDF_DLL
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bool checkIsEncrypted();
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// Execute the job
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QPDF_DLL
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void run();
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// CHECK STATUS -- these methods provide information known after
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// run() is called.
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QPDF_DLL
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bool hasWarnings();
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// Return value is bitwise OR of values from qpdf_encryption_status_e
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QPDF_DLL
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unsigned long getEncryptionStatus();
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// HELPER FUNCTIONS -- methods useful for calling in handlers that
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// interact with QPDFJob during run or initialization.
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// If in verbose mode, call the given function, passing in the
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// output stream and message prefix.
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QPDF_DLL
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void doIfVerbose(
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std::function<void(std::ostream&, std::string const& prefix)> fn);
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// Provide a string that is the help information ("schema" for the
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// qpdf-specific JSON object) for version 1 of the JSON output.
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QPDF_DLL
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static std::string json_out_schema_v1();
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// Provide a string that is the help information for the version 1
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// of JSON format for QPDFJob.
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QPDF_DLL
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static std::string json_job_schema_v1();
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private:
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struct RotationSpec
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{
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RotationSpec(int angle = 0, bool relative = false) :
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angle(angle),
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relative(relative)
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{
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}
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int angle;
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bool relative;
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};
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enum password_mode_e { pm_bytes, pm_hex_bytes, pm_unicode, pm_auto };
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struct UnderOverlay
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{
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UnderOverlay(char const* which) :
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which(which),
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to_nr("1-z"),
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from_nr("1-z"),
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repeat_nr("")
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{
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}
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std::string which;
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std::string filename;
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std::shared_ptr<char> password;
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std::string to_nr;
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std::string from_nr;
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std::string repeat_nr;
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std::shared_ptr<QPDF> pdf;
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std::vector<int> to_pagenos;
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std::vector<int> from_pagenos;
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std::vector<int> repeat_pagenos;
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};
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// Helper functions
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static void usage(std::string const& msg);
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static JSON json_schema(std::set<std::string>* keys = 0);
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static void parse_object_id(
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std::string const& objspec, bool& trailer, int& obj, int& gen);
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void parseRotationParameter(std::string const&);
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std::vector<int> parseNumrange(char const* range, int max);
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// Basic file processing
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std::shared_ptr<QPDF> processFile(
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char const* filename, char const* password);
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std::shared_ptr<QPDF> processInputSource(
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PointerHolder<InputSource> is, char const* password);
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std::shared_ptr<QPDF> doProcess(
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std::function<void(QPDF*, char const*)> fn,
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char const* password, bool empty);
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std::shared_ptr<QPDF> doProcessOnce(
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std::function<void(QPDF*, char const*)> fn,
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char const* password, bool empty);
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// Transformations
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void setQPDFOptions(QPDF& pdf);
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void handlePageSpecs(
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QPDF& pdf, bool& warnings,
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std::vector<std::shared_ptr<QPDF>>& page_heap);
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bool shouldRemoveUnreferencedResources(QPDF& pdf);
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void handleRotations(QPDF& pdf);
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void getUOPagenos(UnderOverlay& uo,
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std::map<int, std::vector<int> >& pagenos);
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void handleUnderOverlay(QPDF& pdf);
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void doUnderOverlayForPage(
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QPDF& pdf,
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UnderOverlay& uo,
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std::map<int, std::vector<int> >& pagenos,
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size_t page_idx,
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std::map<int, QPDFObjectHandle>& fo,
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std::vector<QPDFPageObjectHelper>& pages,
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QPDFPageObjectHelper& dest_page,
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bool before);
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void validateUnderOverlay(QPDF& pdf, UnderOverlay* uo);
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void handleTransformations(QPDF& pdf);
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void addAttachments(QPDF& pdf);
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void copyAttachments(QPDF& pdf);
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// Inspection
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void doInspection(QPDF& pdf);
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void doCheck(QPDF& pdf);
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void showEncryption(QPDF& pdf);
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void doShowObj(QPDF& pdf);
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void doShowPages(QPDF& pdf);
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void doListAttachments(QPDF& pdf);
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void doShowAttachment(QPDF& pdf);
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// Output generation
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void doSplitPages(QPDF& pdf, bool& warnings);
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void setWriterOptions(QPDF& pdf, QPDFWriter& w);
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void setEncryptionOptions(QPDF&, QPDFWriter&);
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void maybeFixWritePassword(int R, std::string& password);
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void writeOutfile(QPDF& pdf);
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// JSON
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void doJSON(QPDF& pdf);
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std::set<QPDFObjGen> getWantedJSONObjects();
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void doJSONObjects(QPDF& pdf, JSON& j);
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void doJSONObjectinfo(QPDF& pdf, JSON& j);
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void doJSONPages(QPDF& pdf, JSON& j);
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void doJSONPageLabels(QPDF& pdf, JSON& j);
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void doJSONOutlines(QPDF& pdf, JSON& j);
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void doJSONAcroform(QPDF& pdf, JSON& j);
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void doJSONEncrypt(QPDF& pdf, JSON& j);
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void doJSONAttachments(QPDF& pdf, JSON& j);
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enum remove_unref_e { re_auto, re_yes, re_no };
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class Members
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{
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friend class QPDFJob;
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public:
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QPDF_DLL
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~Members() = default;
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private:
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Members();
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Members(Members const&) = delete;
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std::string message_prefix;
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bool warnings;
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std::ostream* cout;
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std::ostream* cerr;
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unsigned long encryption_status;
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bool verbose;
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std::shared_ptr<char> password;
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bool linearize;
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bool decrypt;
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int split_pages;
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bool progress;
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bool suppress_warnings;
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bool warnings_exit_zero;
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bool copy_encryption;
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std::string encryption_file;
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std::shared_ptr<char> encryption_file_password;
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bool encrypt;
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bool password_is_hex_key;
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bool suppress_password_recovery;
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password_mode_e password_mode;
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bool allow_insecure;
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bool allow_weak_crypto;
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std::string user_password;
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std::string owner_password;
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int keylen;
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bool r2_print;
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bool r2_modify;
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bool r2_extract;
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bool r2_annotate;
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bool r3_accessibility;
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bool r3_extract;
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bool r3_assemble;
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bool r3_annotate_and_form;
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bool r3_form_filling;
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bool r3_modify_other;
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qpdf_r3_print_e r3_print;
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bool force_V4;
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bool force_R5;
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bool cleartext_metadata;
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bool use_aes;
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bool stream_data_set;
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qpdf_stream_data_e stream_data_mode;
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bool compress_streams;
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bool compress_streams_set;
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bool recompress_flate;
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bool recompress_flate_set;
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int compression_level;
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qpdf_stream_decode_level_e decode_level;
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bool decode_level_set;
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bool normalize_set;
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bool normalize;
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bool suppress_recovery;
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bool object_stream_set;
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qpdf_object_stream_e object_stream_mode;
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bool ignore_xref_streams;
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bool qdf_mode;
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bool preserve_unreferenced_objects;
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remove_unref_e remove_unreferenced_page_resources;
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bool keep_files_open;
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bool keep_files_open_set;
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size_t keep_files_open_threshold;
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bool newline_before_endstream;
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std::string linearize_pass1;
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bool coalesce_contents;
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bool flatten_annotations;
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int flatten_annotations_required;
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int flatten_annotations_forbidden;
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bool generate_appearances;
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std::string min_version;
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std::string force_version;
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bool show_npages;
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bool deterministic_id;
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bool static_id;
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bool static_aes_iv;
|
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bool suppress_original_object_id;
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bool show_encryption;
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bool show_encryption_key;
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bool check_linearization;
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bool show_linearization;
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bool show_xref;
|
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bool show_trailer;
|
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int show_obj;
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int show_gen;
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bool show_raw_stream_data;
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bool show_filtered_stream_data;
|
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bool show_pages;
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bool show_page_images;
|
|
size_t collate;
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bool flatten_rotation;
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bool list_attachments;
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std::string attachment_to_show;
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std::list<std::string> attachments_to_remove;
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std::list<AddAttachment> attachments_to_add;
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std::list<CopyAttachmentFrom> attachments_to_copy;
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bool json;
|
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std::set<std::string> json_keys;
|
|
std::set<std::string> json_objects;
|
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bool check;
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bool optimize_images;
|
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bool externalize_inline_images;
|
|
bool keep_inline_images;
|
|
bool remove_page_labels;
|
|
size_t oi_min_width;
|
|
size_t oi_min_height;
|
|
size_t oi_min_area;
|
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size_t ii_min_bytes;
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UnderOverlay underlay;
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UnderOverlay overlay;
|
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UnderOverlay* under_overlay;
|
|
std::vector<PageSpec> page_specs;
|
|
std::map<std::string, RotationSpec> rotations;
|
|
bool require_outfile;
|
|
bool replace_input;
|
|
bool check_is_encrypted;
|
|
bool check_requires_password;
|
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std::shared_ptr<char> infilename;
|
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std::shared_ptr<char> outfilename;
|
|
};
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std::shared_ptr<Members> m;
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};
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#endif // QPDFOBJECT_HH
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