416 lines
16 KiB
C++
416 lines
16 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2012 Artem Pavlenko, Jean-Francois Doyon
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#include <boost/python.hpp>
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#include <mapnik/text_placements.hpp>
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#include "mapnik_enumeration.hpp"
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#include <mapnik/expression_string.hpp>
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#include <mapnik/text_symbolizer.hpp>
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#include "mapnik_threads.hpp"
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#include "python_optional.hpp"
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using namespace mapnik;
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/* Notes:
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Overriding functions in inherited classes:
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boost.python documentation doesn't really tell you how to do it.
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But this helps:
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http://www.gamedev.net/topic/446225-inheritance-in-boostpython/
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register_ptr_to_python is required for wrapped classes, but not for unwrapped.
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Functions don't have to be members of the class, but can also be
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normal functions taking a ref to the class as first parameter.
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*/
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namespace {
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using namespace boost::python;
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tuple get_displacement(text_symbolizer_properties const& t)
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{
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return boost::python::make_tuple(t.displacement.first, t.displacement.second);
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}
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void set_displacement(text_symbolizer_properties &t, boost::python::tuple arg)
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{
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if (len(arg) != 2)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 2-item tuple in call to set_displacement; got %s"
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% arg).ptr()
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);
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throw_error_already_set();
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}
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double x = extract<double>(arg[0]);
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double y = extract<double>(arg[1]);
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t.displacement = std::make_pair(x, y);
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}
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struct NodeWrap: formating::node, wrapper<formating::node>
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{
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NodeWrap() : formating::node(), wrapper<formating::node>()
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{
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}
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void apply(char_properties const& p, Feature const& feature, processed_text &output) const
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{
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override o = this->get_override("apply");
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python_thread::block();
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o(ptr(&p), ptr(&feature), ptr(&output));
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python_thread::unblock();
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}
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virtual void add_expressions(expression_set &output) const
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{
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override o = this->get_override("add_expressions");
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if (o)
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{
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python_thread::block();
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o(ptr(&output));
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python_thread::unblock();
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} else
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{
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formating::node::add_expressions(output);
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}
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}
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void default_add_expressions(expression_set &output) const
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{
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formating::node::add_expressions(output);
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}
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};
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struct TextNodeWrap: formating::text_node, wrapper<formating::text_node>
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{
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TextNodeWrap(expression_ptr text) : formating::text_node(text), wrapper<formating::text_node>()
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{
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}
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virtual void apply(char_properties const& p, Feature const& feature, processed_text &output) const
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{
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if(override o = this->get_override("apply"))
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{
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python_thread::block();
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o(ptr(&p), ptr(&feature), ptr(&output));
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python_thread::unblock();
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}
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else
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{
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formating::text_node::apply(p, feature, output);
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}
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}
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void default_apply(char_properties const& p, Feature const& feature, processed_text &output) const
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{
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formating::text_node::apply(p, feature, output);
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}
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};
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struct FormatNodeWrap: formating::format_node, wrapper<formating::format_node>
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{
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virtual void apply(char_properties const& p, Feature const& feature, processed_text &output) const
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{
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if(override o = this->get_override("apply"))
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{
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python_thread::block();
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o(ptr(&p), ptr(&feature), ptr(&output));
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python_thread::unblock();
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}
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else
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{
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formating::format_node::apply(p, feature, output);
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}
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}
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void default_apply(char_properties const& p, Feature const& feature, processed_text &output) const
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{
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formating::format_node::apply(p, feature, output);
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}
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};
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struct TextPlacementsWrap: text_placements, wrapper<text_placements>
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{
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text_placement_info_ptr get_placement_info(double scale_factor_, dimension_type dim,
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bool has_dimensions_) const
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{
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override o = this->get_override("get_placement_info");
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python_thread::block();
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text_placement_info_ptr result = o();
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python_thread::unblock();
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return result;
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}
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};
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struct TextPlacementInfoWrap: text_placement_info, wrapper<text_placement_info>
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{
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TextPlacementInfoWrap(text_placements const* parent,
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double scale_factor_, dimension_type dim, bool has_dimensions_)
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: text_placement_info(parent, scale_factor_, dim, has_dimensions_)
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{
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}
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bool next()
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{
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override o = this->get_override("next");
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python_thread::block();
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bool result = o();
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python_thread::unblock();
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return result;
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}
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};
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void insert_expression(expression_set *set, expression_ptr p)
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{
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set->insert(p);
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}
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char_properties & get_format(text_symbolizer const& sym)
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{
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return sym.get_placement_options()->properties.default_format;
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}
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void set_format(text_symbolizer const& sym, char_properties & format)
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{
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sym.get_placement_options()->properties.default_format = format;
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}
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text_symbolizer_properties & get_properties(text_symbolizer const& sym)
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{
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return sym.get_placement_options()->properties;
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}
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void set_properties(text_symbolizer const& sym, text_symbolizer_properties & properties)
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{
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sym.get_placement_options()->properties = properties;
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}
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}
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void export_text_placement()
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{
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using namespace boost::python;
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enumeration_<label_placement_e>("label_placement")
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.value("LINE_PLACEMENT",LINE_PLACEMENT)
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.value("POINT_PLACEMENT",POINT_PLACEMENT)
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.value("VERTEX_PLACEMENT",VERTEX_PLACEMENT)
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.value("INTERIOR_PLACEMENT",INTERIOR_PLACEMENT)
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;
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enumeration_<vertical_alignment_e>("vertical_alignment")
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.value("TOP",V_TOP)
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.value("MIDDLE",V_MIDDLE)
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.value("BOTTOM",V_BOTTOM)
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.value("AUTO",V_AUTO)
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;
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enumeration_<horizontal_alignment_e>("horizontal_alignment")
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.value("LEFT",H_LEFT)
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.value("MIDDLE",H_MIDDLE)
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.value("RIGHT",H_RIGHT)
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.value("AUTO",H_AUTO)
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;
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enumeration_<justify_alignment_e>("justify_alignment")
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.value("LEFT",J_LEFT)
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.value("MIDDLE",J_MIDDLE)
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.value("RIGHT",J_RIGHT)
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;
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enumeration_<text_transform_e>("text_transform")
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.value("NONE",NONE)
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.value("UPPERCASE",UPPERCASE)
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.value("LOWERCASE",LOWERCASE)
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.value("CAPITALIZE",CAPITALIZE)
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;
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class_<text_symbolizer>("TextSymbolizer",
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init<>())
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.def(init<expression_ptr, std::string const&, unsigned, color const&>())
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.add_property("placements",
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&text_symbolizer::get_placement_options,
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&text_symbolizer::set_placement_options)
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//TODO: Check return policy, is there a better way to do this?
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.add_property("format",
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make_function(&get_format, return_value_policy<reference_existing_object>()),
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&set_format,
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"Shortcut for placements.defaults.default_format")
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.add_property("properties",
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make_function(&get_properties, return_value_policy<reference_existing_object>()),
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&set_properties,
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"Shortcut for placements.defaults")
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;
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class_<text_symbolizer_properties>
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("TextSymbolizerProperties")
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.def_readwrite("orientation", &text_symbolizer_properties::orientation)
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.add_property("displacement",
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&get_displacement,
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&set_displacement)
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.def_readwrite("label_placement", &text_symbolizer_properties::label_placement)
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.def_readwrite("horizontal_alignment", &text_symbolizer_properties::halign)
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.def_readwrite("justify_alignment", &text_symbolizer_properties::jalign)
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.def_readwrite("vertical_alignment", &text_symbolizer_properties::valign)
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.def_readwrite("label_spacing", &text_symbolizer_properties::label_spacing)
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.def_readwrite("label_position_tolerance", &text_symbolizer_properties::label_position_tolerance)
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.def_readwrite("avoid_edges", &text_symbolizer_properties::avoid_edges)
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.def_readwrite("minimum_distance", &text_symbolizer_properties::minimum_distance)
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.def_readwrite("minimum_padding", &text_symbolizer_properties::minimum_padding)
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.def_readwrite("minimum_path_length", &text_symbolizer_properties::minimum_path_length)
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.def_readwrite("maximum_angle_char_delta", &text_symbolizer_properties::max_char_angle_delta)
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.def_readwrite("force_odd_labels", &text_symbolizer_properties::force_odd_labels)
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.def_readwrite("allow_overlap", &text_symbolizer_properties::allow_overlap)
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.def_readwrite("text_ratio", &text_symbolizer_properties::text_ratio)
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.def_readwrite("wrap_width", &text_symbolizer_properties::wrap_width)
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.def_readwrite("default_format", &text_symbolizer_properties::default_format)
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.add_property ("format_tree",
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&text_symbolizer_properties::format_tree,
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&text_symbolizer_properties::set_format_tree);
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/* from_xml, to_xml operate on mapnik's internal XML tree and don't make sense in python.
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add_expressions isn't useful in python either. The result is only needed by
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attribute_collector (which isn't exposed in python) and
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it just calls add_expressions of the associated formating tree.
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set_old_style expression is just a compatibility wrapper and doesn't need to be exposed in python. */
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;
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class_<char_properties>
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("CharProperties")
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.def(init<char_properties const&>()) //Copy constructor
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.def_readwrite("face_name", &char_properties::face_name)
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.def_readwrite("fontset", &char_properties::fontset)
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.def_readwrite("text_size", &char_properties::text_size)
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.def_readwrite("character_spacing", &char_properties::character_spacing)
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.def_readwrite("line_spacing", &char_properties::line_spacing)
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.def_readwrite("text_opacity", &char_properties::text_opacity)
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.def_readwrite("wrap_char", &char_properties::wrap_char)
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.def_readwrite("wrap_before", &char_properties::wrap_before)
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.def_readwrite("text_transform", &char_properties::text_transform)
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.def_readwrite("fill", &char_properties::fill)
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.def_readwrite("halo_fill", &char_properties::halo_fill)
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.def_readwrite("halo_radius", &char_properties::halo_radius)
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/* from_xml, to_xml operate on mapnik's internal XML tree and don't make sense in python.*/
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;
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class_<TextPlacementsWrap,
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boost::shared_ptr<TextPlacementsWrap>,
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boost::noncopyable>
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("TextPlacements")
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.def_readwrite("defaults", &text_placements::properties)
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.def("get_placement_info", pure_virtual(&text_placements::get_placement_info))
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/* TODO: add_expressions() */
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;
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register_ptr_to_python<boost::shared_ptr<text_placements> >();
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class_<TextPlacementInfoWrap,
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boost::shared_ptr<TextPlacementInfoWrap>,
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boost::noncopyable>
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("TextPlacementInfo",
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init<text_placements const*, double, dimension_type, bool>())
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.def("next", pure_virtual(&text_placement_info::next))
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.def("get_actual_label_spacing", &text_placement_info::get_actual_label_spacing)
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.def("get_actual_minimum_distance", &text_placement_info::get_actual_minimum_distance)
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.def("get_actual_minimum_padding", &text_placement_info::get_actual_minimum_padding)
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.def_readwrite("properties", &text_placement_info::properties)
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.def_readwrite("scale_factor", &text_placement_info::scale_factor)
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.def_readwrite("has_dimensions", &text_placement_info::has_dimensions)
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.def_readwrite("dimensions", &text_placement_info::dimensions)
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.def_readwrite("collect_extents", &text_placement_info::collect_extents)
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.def_readwrite("extents", &text_placement_info::extents)
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.def_readwrite("additional_boxes", &text_placement_info::additional_boxes)
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.def_readwrite("envelopes", &text_placement_info::envelopes)
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// .def_readwrite("placements", &text_placement_info::placements)
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;
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register_ptr_to_python<boost::shared_ptr<text_placement_info> >();
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class_<processed_text,
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boost::shared_ptr<processed_text>,
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boost::noncopyable>
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("ProcessedText", no_init)
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.def("push_back", &processed_text::push_back)
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.def("clear", &processed_text::clear)
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;
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class_<expression_set,
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boost::shared_ptr<expression_set>,
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boost::noncopyable>
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("ExpressionSet")
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.def("insert", &insert_expression);
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;
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//TODO: Python namespace
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class_<NodeWrap,
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boost::shared_ptr<NodeWrap>,
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boost::noncopyable>
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("FormatingNode")
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.def("apply", pure_virtual(&formating::node::apply))
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.def("add_expressions",
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&formating::node::add_expressions,
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&NodeWrap::default_add_expressions)
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;
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register_ptr_to_python<boost::shared_ptr<formating::node> >();
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class_<TextNodeWrap,
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boost::shared_ptr<TextNodeWrap>,
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bases<formating::node>,
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boost::noncopyable>
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("FormatingTextNode", init<expression_ptr>())
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.def("apply", &formating::text_node::apply, &TextNodeWrap::default_apply)
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.add_property("text",
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&formating::text_node::get_text,
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&formating::text_node::set_text)
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;
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register_ptr_to_python<boost::shared_ptr<formating::text_node> >();
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class_with_optional<FormatNodeWrap,
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boost::shared_ptr<FormatNodeWrap>,
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bases<formating::node>,
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boost::noncopyable>
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("FormatingFormatNode")
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.def_readwrite_optional("text_size", &formating::format_node::text_size)
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.def_readwrite_optional("face_name", &formating::format_node::face_name)
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.def_readwrite_optional("character_spacing", &formating::format_node::character_spacing)
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.def_readwrite_optional("line_spacing", &formating::format_node::line_spacing)
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.def_readwrite_optional("text_opacity", &formating::format_node::text_opacity)
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.def_readwrite_optional("wrap_char", &formating::format_node::wrap_char)
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.def_readwrite_optional("wrap_before", &formating::format_node::wrap_before)
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.def_readwrite_optional("text_transform", &formating::format_node::text_transform)
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.def_readwrite_optional("fill", &formating::format_node::fill)
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.def_readwrite_optional("halo_fill", &formating::format_node::halo_fill)
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.def_readwrite_optional("halo_radius", &formating::format_node::halo_radius)
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.def("apply", &formating::format_node::apply, &FormatNodeWrap::default_apply)
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.add_property("child",
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&formating::format_node::get_child,
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&formating::format_node::set_child)
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;
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register_ptr_to_python<boost::shared_ptr<formating::format_node> >();
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}
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