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fb70c52b05
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@9877 a592a061-630c-0410-9148-cb99ea01b6c8
379 lines
9.5 KiB
C
379 lines
9.5 KiB
C
/**
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* \file GraphicsConverter.C
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Angus Leeming
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "GraphicsConverter.h"
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#include "converter.h"
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#include "debug.h"
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#include "format.h"
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#include "support/filetools.h"
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#include "support/forkedcallqueue.h"
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#include "support/convert.h"
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#include "support/lstrings.h"
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#include "support/lyxlib.h"
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#include <boost/bind.hpp>
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#include <sstream>
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#include <fstream>
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namespace support = lyx::support;
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using support::ChangeExtension;
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using support::Forkedcall;
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using support::ForkedCallQueue;
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using support::LibFileSearch;
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using support::LibScriptSearch;
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using support::OnlyPath;
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using support::OnlyFilename;
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using support::QuoteName;
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using support::subst;
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using support::tempName;
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using support::unlink;
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using std::endl;
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using std::ostream;
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using std::ostringstream;
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using std::string;
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namespace lyx {
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namespace graphics {
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class Converter::Impl : public boost::signals::trackable {
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public:
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///
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Impl(string const &, string const &, string const &, string const &);
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///
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void startConversion();
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/** This method is connected to a signal passed to the forked call
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* class, passing control back here when the conversion is completed.
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* Cleans-up the temporary files, emits the finishedConversion
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* signal and removes the Converter from the list of all processes.
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*/
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void converted(pid_t pid, int retval);
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/** At the end of the conversion process inform the outside world
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* by emitting a signal.
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*/
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typedef boost::signal<void(bool)> SignalType;
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///
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SignalType finishedConversion;
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///
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string script_command_;
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///
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string script_file_;
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///
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string to_file_;
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///
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bool valid_process_;
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///
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bool finished_;
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};
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bool Converter::isReachable(string const & from_format_name,
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string const & to_format_name)
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{
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return converters.isReachable(from_format_name, to_format_name);
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}
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Converter::Converter(string const & from_file, string const & to_file_base,
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string const & from_format, string const & to_format)
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: pimpl_(new Impl(from_file, to_file_base, from_format, to_format))
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{}
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// Empty d-tor out-of-line to keep boost::scoped_ptr happy.
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Converter::~Converter()
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{}
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void Converter::startConversion() const
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{
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pimpl_->startConversion();
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}
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boost::signals::connection Converter::connect(slot_type const & slot) const
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{
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return pimpl_->finishedConversion.connect(slot);
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}
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string const & Converter::convertedFile() const
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{
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static string const empty;
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return pimpl_->finished_ ? pimpl_->to_file_ : empty;
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}
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} // namespace graphics
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} // namespace lyx
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//------------------------------
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// Implementation details follow
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//------------------------------
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namespace {
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/** Build the conversion script, returning true if able to build it.
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* The script is output to the ostringstream 'script'.
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*/
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bool build_script(string const & from_file, string const & to_file_base,
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string const & from_format, string const & to_format,
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ostream & script);
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} // namespace anon
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namespace lyx {
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namespace graphics {
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Converter::Impl::Impl(string const & from_file, string const & to_file_base,
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string const & from_format, string const & to_format)
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: valid_process_(false), finished_(false)
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{
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lyxerr[Debug::GRAPHICS] << "Converter c-tor:\n"
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<< "\tfrom_file: " << from_file
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<< "\n\tto_file_base: " << to_file_base
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<< "\n\tfrom_format: " << from_format
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<< "\n\tto_format: " << to_format << endl;
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// The converted image is to be stored in this file (we do not
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// use ChangeExtension because this is a basename which may
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// nevertheless contain a '.')
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to_file_ = to_file_base + '.' + formats.extension(to_format);
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// The conversion commands are stored in a stringstream
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ostringstream script;
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script << "#!/bin/sh\n";
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bool const success = build_script(from_file, to_file_base,
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from_format, to_format, script);
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if (!success) {
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script_command_ =
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"sh " +
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QuoteName(LibFileSearch("scripts", "convertDefault.sh")) +
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' ' +
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QuoteName(from_format + ':' + from_file) +
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' ' +
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QuoteName(to_format + ':' + to_file_);
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lyxerr[Debug::GRAPHICS]
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<< "\tNo converter defined! I use convertDefault.sh\n\t"
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<< script_command_ << endl;
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} else {
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lyxerr[Debug::GRAPHICS] << "\tConversion script:"
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<< "\n--------------------------------------\n"
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<< script.str()
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<< "\n--------------------------------------\n";
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// Output the script to file.
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static int counter = 0;
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script_file_ = OnlyPath(to_file_base) + "lyxconvert" +
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convert<string>(counter++) + ".sh";
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std::ofstream fs(script_file_.c_str());
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if (!fs.good()) {
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lyxerr << "Unable to write the conversion script to \""
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<< script_file_ << '\n'
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<< "Please check your directory permissions."
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<< std::endl;
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return;
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}
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fs << script.str();
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fs.close();
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// The command needed to run the conversion process
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// We create a dummy command for ease of understanding of the
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// list of forked processes.
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// Note: 'sh ' is absolutely essential, or execvp will fail.
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script_command_ = "sh " + QuoteName(script_file_) + ' ' +
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QuoteName(OnlyFilename(from_file)) + ' ' +
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QuoteName(to_format);
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}
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// All is ready to go
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valid_process_ = true;
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}
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void Converter::Impl::startConversion()
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{
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if (!valid_process_) {
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converted(0, 1);
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return;
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}
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Forkedcall::SignalTypePtr
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ptr = ForkedCallQueue::get().add(script_command_);
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ptr->connect(boost::bind(&Impl::converted, this, _1, _2));
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}
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void Converter::Impl::converted(pid_t /* pid */, int retval)
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{
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if (finished_)
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// We're done already!
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return;
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finished_ = true;
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// Clean-up behind ourselves
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unlink(script_file_);
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if (retval > 0) {
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unlink(to_file_);
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to_file_.erase();
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finishedConversion(false);
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} else {
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finishedConversion(true);
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}
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}
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} // namespace graphics
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} // namespace lyx
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namespace {
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string const move_file(string const & from_file, string const & to_file)
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{
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if (from_file == to_file)
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return string();
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ostringstream command;
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command << "fromfile=" << from_file << "\n"
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<< "tofile=" << to_file << "\n\n"
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<< "'mv' -f \"${fromfile}\" \"${tofile}\" ||\n"
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<< "{\n"
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<< "\t'cp' -f \"${fromfile}\" \"${tofile}\" ||\n"
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<< "\t{\n"
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<< "\t\texit 1\n"
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<< "\t}\n"
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<< "\t'rm' -f \"${fromfile}\"\n"
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<< "}\n";
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return command.str();
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}
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bool build_script(string const & from_file,
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string const & to_file_base,
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string const & from_format,
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string const & to_format,
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ostream & script)
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{
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lyxerr[Debug::GRAPHICS] << "build_script ... ";
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typedef Converters::EdgePath EdgePath;
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// we do not use ChangeExtension because this is a basename
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// which may nevertheless contain a '.'
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string const to_file = to_file_base + '.'
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+ formats.extension(to_format);
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if (from_format == to_format) {
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script << move_file(QuoteName(from_file), QuoteName(to_file));
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lyxerr[Debug::GRAPHICS] << "ready (from == to)" << endl;
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return true;
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}
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EdgePath edgepath = converters.getPath(from_format, to_format);
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if (edgepath.empty()) {
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lyxerr[Debug::GRAPHICS] << "ready (edgepath.empty())" << endl;
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return false;
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}
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// Create a temporary base file-name for all intermediate steps.
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// Remember to remove the temp file because we only want the name...
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static int counter = 0;
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string const tmp = "gconvert" + convert<string>(counter++);
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string const to_base = tempName(string(), tmp);
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unlink(to_base);
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string outfile = from_file;
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// The conversion commands may contain these tokens that need to be
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// changed to infile, infile_base, outfile respectively.
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string const token_from("$$i");
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string const token_base("$$b");
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string const token_to("$$o");
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EdgePath::const_iterator it = edgepath.begin();
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EdgePath::const_iterator end = edgepath.end();
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for (; it != end; ++it) {
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::Converter const & conv = converters.get(*it);
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// Build the conversion command
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string const infile = outfile;
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string const infile_base = ChangeExtension(infile, string());
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outfile = ChangeExtension(to_base, conv.To->extension());
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// Store these names in the shell script
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script << "infile=" << QuoteName(infile) << '\n'
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<< "infile_base=" << QuoteName(infile_base) << '\n'
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<< "outfile=" << QuoteName(outfile) << '\n';
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string command = conv.command;
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command = subst(command, token_from, "\"${infile}\"");
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command = subst(command, token_base, "\"${infile_base}\"");
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command = subst(command, token_to, "\"${outfile}\"");
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command = LibScriptSearch(command);
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// Store in the shell script
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script << "\n" << command << " ||\n";
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// Test that this was successful. If not, remove
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// ${outfile} and exit the shell script
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script << "{\n"
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<< "\t'rm' -f \"${outfile}\"\n"
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<< "\texit 1\n"
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<< "}\n\n";
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// Test that the outfile exists.
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// ImageMagick's convert will often create ${outfile}.0,
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// ${outfile}.1.
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// If this occurs, move ${outfile}.0 to ${outfile}
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// and delete ${outfile}.?
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script << "if [ ! -f \"${outfile}\" ]; then\n"
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<< "\tif [ -f \"${outfile}\".0 ]; then\n"
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<< "\t\t'mv' -f \"${outfile}\".0 \"${outfile}\"\n"
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<< "\t\t'rm' -f \"${outfile}\".?\n"
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<< "\telse\n"
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<< "\t\texit 1\n"
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<< "\tfi\n"
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<< "fi\n\n";
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// Delete the infile, if it isn't the original, from_file.
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if (infile != from_file) {
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script << "'rm' -f \"${infile}\"\n\n";
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}
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}
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// Move the final outfile to to_file
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script << move_file("\"${outfile}\"", QuoteName(to_file));
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lyxerr[Debug::GRAPHICS] << "ready!" << endl;
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return true;
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}
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} // namespace anon
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