/usr/include/mapnik/text/itemizer.hpp is in libmapnik-dev 3.0.9+ds-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_TEXT_ITEMIZER_HPP
#define MAPNIK_TEXT_ITEMIZER_HPP
//mapnik
#include <mapnik/text/evaluated_format_properties_ptr.hpp>
#include <mapnik/value_types.hpp>
#include <mapnik/util/noncopyable.hpp>
#include <mapnik/config.hpp>
// stl
#include <string>
#include <list>
#include <vector>
// ICU
#include <unicode/unistr.h>
#include <unicode/uscript.h>
#include <unicode/ubidi.h>
namespace mapnik
{
struct MAPNIK_DECL text_item : util::noncopyable
{
text_item(unsigned s,
unsigned e,
UScriptCode sc,
UBiDiDirection d,
evaluated_format_properties_ptr const& f)
: start(s),
end(e),
script(sc),
dir(d),
format_(f) {}
text_item( text_item && rhs)
: start(std::move(rhs.start)),
end(std::move(rhs.end)),
script(std::move(rhs.script)),
dir(std::move(rhs.dir)),
format_(rhs.format_) {}
unsigned start; // First char (UTF16 offset)
unsigned end; // Char _after_ the last char (UTF16 offset)
UScriptCode script;
UBiDiDirection dir;
evaluated_format_properties_ptr const& format_;
};
// This class splits text into parts which all have the same
// - direction (LTR, RTL)
// - format
// - script (http://en.wikipedia.org/wiki/Scripts_in_Unicode)
class MAPNIK_DECL text_itemizer : util::noncopyable
{
public:
text_itemizer();
void add_text(value_unicode_string const& str, evaluated_format_properties_ptr const& format);
std::list<text_item> const& itemize(unsigned start=0, unsigned end=0);
void clear();
value_unicode_string const& text() const { return text_; }
// Returns the start and end position of a certain line.
// Only forced line breaks with \n characters are handled here.
std::pair<unsigned, unsigned> line(unsigned i) const;
unsigned num_lines() const;
private:
template<typename T> struct run : util::noncopyable
{
run(T const& _data, unsigned _start, unsigned _end)
: start(_start), end(_end), data(_data) {}
unsigned start;
unsigned end;
T data;
};
using format_run_t = run<evaluated_format_properties_ptr const&>;
using direction_run_t = run<UBiDiDirection>;
using script_run_t = run<UScriptCode>;
using format_run_list = std::list<format_run_t>;
using script_run_list = std::list<script_run_t>;
using direction_run_list = std::list<direction_run_t>;
value_unicode_string text_;
/// Format runs are always sorted by char index
format_run_list format_runs_;
/// Directions runs are always in visual order! This is different from
/// format and script runs!
direction_run_list direction_runs_;
/// Script runs are always sorted by char index
script_run_list script_runs_;
void itemize_direction(unsigned start, unsigned end);
void itemize_script();
void create_item_list();
std::list<text_item> output_;
template <typename T> typename T::const_iterator find_run(T const& list, unsigned position);
std::vector<unsigned> forced_line_breaks_; //Positions of \n characters
};
} //ns mapnik
#endif // TEXT_ITEMIZER_HPP
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