139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
// mapnik
|
|
#include <mapnik/expression_string.hpp>
|
|
#include <mapnik/transform_expression.hpp>
|
|
|
|
// stl
|
|
#include <sstream>
|
|
|
|
namespace mapnik {
|
|
|
|
struct transform_node_to_expression_string
|
|
|
|
{
|
|
std::ostringstream& os_;
|
|
|
|
transform_node_to_expression_string(std::ostringstream& os)
|
|
: os_(os) {}
|
|
|
|
void operator() (identity_node const&) const
|
|
{
|
|
}
|
|
|
|
void operator() (matrix_node const& node)
|
|
{
|
|
os_ << "matrix("
|
|
<< to_expression_string(node.a_) << ", "
|
|
<< to_expression_string(node.b_) << ", "
|
|
<< to_expression_string(node.c_) << ", "
|
|
<< to_expression_string(node.d_) << ", "
|
|
<< to_expression_string(node.e_) << ", "
|
|
<< to_expression_string(node.f_) << ")";
|
|
}
|
|
|
|
void operator() (translate_node const& node)
|
|
{
|
|
if (detail::is_null_node(node.ty_))
|
|
{
|
|
os_ << "translate("
|
|
<< to_expression_string(node.tx_) << ")";
|
|
}
|
|
else
|
|
{
|
|
os_ << "translate("
|
|
<< to_expression_string(node.tx_) << ", "
|
|
<< to_expression_string(node.ty_) << ")";
|
|
}
|
|
}
|
|
|
|
void operator() (scale_node const& node)
|
|
{
|
|
if (detail::is_null_node(node.sy_))
|
|
{
|
|
os_ << "scale("
|
|
<< to_expression_string(node.sx_) << ")";
|
|
}
|
|
else
|
|
{
|
|
os_ << "scale("
|
|
<< to_expression_string(node.sx_) << ", "
|
|
<< to_expression_string(node.sy_) << ")";
|
|
}
|
|
}
|
|
|
|
void operator() (rotate_node const& node)
|
|
{
|
|
if (detail::is_null_node(node.cy_) || detail::is_null_node(node.cy_))
|
|
{
|
|
os_ << "rotate("
|
|
<< to_expression_string(node.angle_) << ")";
|
|
}
|
|
else
|
|
{
|
|
os_ << "rotate("
|
|
<< to_expression_string(node.angle_) << ", "
|
|
<< to_expression_string(node.cx_) << ", "
|
|
<< to_expression_string(node.cy_) << ")";
|
|
}
|
|
}
|
|
|
|
void operator() (skewX_node const& node)
|
|
{
|
|
os_ << "skewX("
|
|
<< to_expression_string(node.angle_) << ")";
|
|
}
|
|
|
|
void operator() (skewY_node const& node)
|
|
{
|
|
os_ << "skewY("
|
|
<< to_expression_string(node.angle_) << ")";
|
|
}
|
|
};
|
|
|
|
|
|
std::string to_expression_string(transform_node const& node)
|
|
{
|
|
std::ostringstream os; // FIXME set precision?
|
|
transform_node_to_expression_string to_string(os);
|
|
util::apply_visitor(to_string, *node);
|
|
return os.str();
|
|
}
|
|
|
|
|
|
std::string to_expression_string(transform_list const& list)
|
|
{
|
|
std::ostringstream os; // FIXME set precision?
|
|
std::streamsize first = 1;
|
|
transform_node_to_expression_string to_string(os);
|
|
|
|
for (transform_node const& node : list)
|
|
{
|
|
os.write(" ", first ? (first = 0) : 1);
|
|
util::apply_visitor(to_string, *node);
|
|
}
|
|
return os.str();
|
|
}
|
|
|
|
|
|
} // namespace mapnik
|