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91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
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/**
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* \file epstools.cpp
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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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* parts Copyright 1985, 1990, 1993 Free Software Foundation, Inc.
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*
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* \author Ivan Schreter
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* \author Dirk Niggemann
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* \author Asger Alstrup
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* \author Lars Gullik Bjønnes
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* \author Jean-Marc Lasgouttes
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* \author Angus Leeming
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* \author John Levon
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* \author Herbert Voß
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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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* Utilities for manipulation of Encapsulated Postscript files
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*/
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#include <config.h>
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#include "graphics/epstools.h"
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#include "Format.h"
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#include "support/debug.h"
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#include "support/filetools.h"
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#include "support/FileName.h"
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#include "support/regex.h"
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using namespace std;
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using namespace lyx::support;
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namespace lyx {
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namespace graphics {
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string const readBB_from_PSFile(FileName const & file)
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{
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// in a (e)ps-file it's an entry like %%BoundingBox:23 45 321 345
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// It seems that every command in the header has an own line,
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// getline() should work for all files.
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// On the other hand some plot programs write the bb at the
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// end of the file. Than we have in the header:
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// %%BoundingBox: (atend)
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// In this case we must check the end.
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bool zipped = file.isZippedFile();
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FileName const file_ = zipped ? unzipFile(file) : file;
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string const format = file_.guessFormatFromContents();
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if (format != "eps" && format != "ps") {
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LYXERR(Debug::GRAPHICS, "[readBB_from_PSFile] no(e)ps-format");
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if (zipped)
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file_.removeFile();
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return string();
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}
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static lyx::regex bbox_re(
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"^%%BoundingBox:\\s*([[:digit:]]+)\\s+([[:digit:]]+)\\s+([[:digit:]]+)\\s+([[:digit:]]+)");
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ifstream is(file_.toFilesystemEncoding().c_str());
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while (is) {
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string s;
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getline(is,s);
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lyx::smatch what;
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if (regex_match(s, what, bbox_re)) {
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// Our callers expect the tokens in the string
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// separated by single spaces.
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// FIXME: change return type from string to something
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// sensible
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ostringstream os;
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os << what.str(1) << ' ' << what.str(2) << ' '
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<< what.str(3) << ' ' << what.str(4);
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string const bb = os.str();
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LYXERR(Debug::GRAPHICS, "[readBB_from_PSFile] " << bb);
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if (zipped)
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file_.removeFile();
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return bb;
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}
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}
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LYXERR(Debug::GRAPHICS, "[readBB_from_PSFile] no bb found");
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if (zipped)
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file_.removeFile();
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return string();
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}
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} // namespace graphics
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} // namespace lyx
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