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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/SVGOutput.cpp')
| -rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/SVGOutput.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/SVGOutput.cpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/SVGOutput.cpp new file mode 100644 index 00000000000..26621d49303 --- /dev/null +++ b/Build/source/texk/dvisvgm/dvisvgm-src/src/SVGOutput.cpp @@ -0,0 +1,174 @@ +/************************************************************************* +** SVGOutput.cpp ** +** ** +** This file is part of dvisvgm -- the DVI to SVG converter ** +** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de> ** +** ** +** This program is free software; you can redistribute it and/or ** +** modify it under the terms of the GNU General Public License as ** +** published by the Free Software Foundation; either version 3 of ** +** the License, or (at your option) any later version. ** +** ** +** This program is distributed in the hope that it will be useful, but ** +** WITHOUT ANY WARRANTY; without even the implied warranty of ** +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** +** GNU General Public License for more details. ** +** ** +** You should have received a copy of the GNU General Public License ** +** along with this program; if not, see <http://www.gnu.org/licenses/>. ** +*************************************************************************/ + +#include <algorithm> +#include <cmath> +#include <iomanip> +#include <iostream> +#include <sstream> +#include "gzstream.h" +#include "Calculator.h" +#include "FileSystem.h" +#include "Message.h" +#include "SVGOutput.h" + + +using namespace std; + +SVGOutput::SVGOutput (const char *base, string pattern, int zipLevel) + : _path(base ? base : ""), + _pattern(pattern), + _stdout(base == 0), + _zipLevel(zipLevel), + _page(-1), + _os(0) +{ +} + + +/** Returns an output stream for the given page. + * @param[in] page number of current page + * @param[in] numPages total number of pages in the DVI file + * @return output stream for the given page */ +ostream& SVGOutput::getPageStream (int page, int numPages) const { + string fname = filename(page, numPages); + if (fname.empty()) { + delete _os; + _os = 0; + return cout; + } + if (page == _page) + return *_os; + + _page = page; + delete _os; + if (_zipLevel > 0) + _os = new ogzstream(fname.c_str(), _zipLevel); + else + _os = new ofstream(fname.c_str()); + if (!_os || !*_os) { + delete _os; + _os = 0; + throw MessageException("can't open file "+fname+" for writing"); + } + return *_os; +} + + +/** Returns the name of the SVG file containing the given page. + * @param[in] page number of current page + * @param[in] numPages total number of pages */ +string SVGOutput::filename (int page, int numPages) const { + if (_stdout) + return ""; + string pattern = _pattern; + expandFormatString(pattern, page, numPages); + // remove leading and trailing whitespace + stringstream trim; + trim << pattern; + pattern.clear(); + trim >> pattern; + // set and expand default pattern if necessary + if (pattern.empty()) { + pattern = numPages > 1 ? "%f-%p" : "%f"; + expandFormatString(pattern, page, numPages); + } + // append suffix if necessary + FilePath outpath(pattern, true); + if (outpath.suffix().empty()) + outpath.suffix(_zipLevel > 0 ? "svgz" : "svg"); + string abspath = outpath.absolute(); + string relpath = outpath.relative(); + return abspath.length() < relpath.length() ? abspath : relpath; +} + + +static int ilog10 (int n) { + int result = 0; + while (n >= 10) { + result++; + n /= 10; + } + return result; +} + + +/** Replace expressions in a given string by the corresponing values. + * Supported constructs: + * %f: basename of the current file (filename without suffix) + * %[0-9]?p: current page number + * %[0-9]?P: number of pages in DVI file + * %[0-9]?(expr): arithmetic expression */ +void SVGOutput::expandFormatString (string &str, int page, int numPages) const { + string result; + while (!str.empty()) { + size_t pos = str.find('%'); + if (pos == string::npos) { + result += str; + str.clear(); + } + else { + result += str.substr(0, pos); + str = str.substr(pos); + pos = 1; + ostringstream oss; + if (isdigit(str[pos])) { + oss << setw(str[pos]-'0') << setfill('0'); + pos++; + } + else { + oss << setw(ilog10(numPages)+1) << setfill('0'); + } + switch (str[pos]) { + case 'f': + result += _path.basename(); + break; + case 'p': + case 'P': + oss << (str[pos] == 'p' ? page : numPages); + result += oss.str(); + break; + case '(': { + size_t endpos = str.find(')', pos); + if (endpos == string::npos) + throw MessageException("missing ')' in filename pattern"); + else if (endpos-pos-1 > 1) { + try { + Calculator calculator; + calculator.setVariable("p", page); + calculator.setVariable("P", numPages); + oss << floor(calculator.eval(str.substr(pos, endpos-pos+1))); + result += oss.str(); + } + catch (CalculatorException &e) { + oss.str(""); + oss << "error in filename pattern (" << e.what() << ")"; + throw MessageException(oss.str()); + } + pos = endpos; + } + break; + } + } + str = str.substr(pos+1); + } + } + str = result; +} |