mapnik/src/symbolizer_keys.cpp

/*****************************************************************************
 *
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2013 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
 *
 *****************************************************************************/

#include <mapnik/symbolizer.hpp>
#include <mapnik/color.hpp>
#include <mapnik/gamma_method.hpp>
#include <mapnik/simplify.hpp>

// boost
#include <boost/algorithm/string/replace.hpp>  // for replace

namespace mapnik {

// tuple -> name, default value, enumeration to string converter lambda
static const property_meta_type key_meta[static_cast<unsigned>(keys::MAX_SYMBOLIZER_KEY)] =
{
    property_meta_type{ "gamma", 1.0, nullptr},
    property_meta_type{ "gamma-method", static_cast<value_integer>(GAMMA_POWER), nullptr},
    property_meta_type{ "opacity", 1.0, nullptr},
    property_meta_type{ "alignment", enumeration_wrapper(LOCAL_ALIGNMENT),
      [](enumeration_wrapper e) { return enumeration<pattern_alignment_enum,pattern_alignment_enum_MAX>(pattern_alignment_enum(e.value)).as_string();}},
    property_meta_type{ "offset", 0.0, nullptr},
    property_meta_type{ "comp-op", enumeration_wrapper(src_over),
      [](enumeration_wrapper e) { return *comp_op_to_string(composite_mode_e(e.value)); }},
    property_meta_type{ "clip", false, nullptr},
    property_meta_type{ "fill", mapnik::color("gray"), nullptr},
    property_meta_type{ "fill-opacity", 1.0 , nullptr},
    property_meta_type{ "stroke", mapnik::color("black"), nullptr},
    property_meta_type{ "stroke-width", 1.0 , nullptr},
    property_meta_type{ "stroke-opacity", 1.0, nullptr},
    property_meta_type{ "stroke-linejoin", enumeration_wrapper(MITER_JOIN),
      [](enumeration_wrapper e) { return enumeration<line_join_enum,line_join_enum_MAX>(line_join_enum(e.value)).as_string();}},
    property_meta_type{ "stroke-linecap", enumeration_wrapper(BUTT_CAP),
      [](enumeration_wrapper e) { return enumeration<line_cap_enum,line_cap_enum_MAX>(line_cap_enum(e.value)).as_string();}},
    property_meta_type{ "stroke-gamma", 1.0, nullptr},
    property_meta_type{ "stroke-gamma-method",static_cast<value_integer>(GAMMA_POWER), nullptr},
    property_meta_type{ "stroke-dashoffset", static_cast<value_integer>(0), nullptr},
    property_meta_type{ "stroke-dasharray", false, nullptr},
    property_meta_type{ "stroke-miterlimit", 4.0, nullptr},
    property_meta_type{ "geometry-transform", false, nullptr},
    property_meta_type{ "line-rasterizer", enumeration_wrapper(RASTERIZER_FULL),
      [](enumeration_wrapper e) { return enumeration<line_rasterizer_enum,line_rasterizer_enum_MAX>(line_rasterizer_enum(e.value)).as_string();}},
    property_meta_type{ "transform", false, nullptr},
    property_meta_type{ "spacing", 0.0, nullptr},
    property_meta_type{ "max-error", 0.0, nullptr},
    property_meta_type{ "allow-overlap",false, nullptr},
    property_meta_type{ "ignore-placement", false, nullptr},
    property_meta_type{ "width",static_cast<value_integer>(0), nullptr},
    property_meta_type{ "height",static_cast<value_integer>(0), nullptr},
    property_meta_type{ "file", "", nullptr},
    property_meta_type{ "shield-dx", 0.0, nullptr},
    property_meta_type{ "shield-dy", 0.0, nullptr},
    property_meta_type{ "unlock-image",false, nullptr},
    property_meta_type{ "text-opacity", 1.0, nullptr},
    property_meta_type{ "mode",false, nullptr},
    property_meta_type{ "scaling", 1.0, nullptr},
    property_meta_type{ "filter-factor", 1.0, nullptr},
    property_meta_type{ "mesh-size", static_cast<value_integer>(0), nullptr},
    property_meta_type{ "premultiplied", false, nullptr},
    property_meta_type{ "smooth", false, nullptr},
    property_meta_type{ "simplify-algorithm", enumeration_wrapper(radial_distance),
      [](enumeration_wrapper e) { return *simplify_algorithm_to_string(simplify_algorithm_e(e.value));}},
    property_meta_type{ "simplify-tolerance", 0.0, nullptr},
    property_meta_type{ "halo-rasterizer", enumeration_wrapper(HALO_RASTERIZER_FULL),
      [](enumeration_wrapper e) { return enumeration<halo_rasterizer_enum,halo_rasterizer_enum_MAX>(halo_rasterizer_enum(e.value)).as_string();}},
    property_meta_type{ "text-placements", false, nullptr},
    property_meta_type{ "placement", enumeration_wrapper(MARKER_POINT_PLACEMENT),
      [](enumeration_wrapper e) { return enumeration<marker_placement_enum,marker_placement_enum_MAX>(marker_placement_enum(e.value)).as_string();}}, // FIXME - rename to "markers-placement-type"
    property_meta_type{ "multi-policy", enumeration_wrapper(MARKER_EACH_MULTI),
      [](enumeration_wrapper e) { return enumeration<marker_multi_policy_enum,marker_multi_policy_enum_MAX>(marker_multi_policy_enum(e.value)).as_string();}}, // FIXME - better naming ^^
    property_meta_type{ "placement", enumeration_wrapper(CENTROID_POINT_PLACEMENT),
      [](enumeration_wrapper e) { return enumeration<point_placement_enum,point_placement_enum_MAX>(point_placement_enum(e.value)).as_string();}},
    property_meta_type{ "raster-colorizer", nullptr, nullptr }
};

property_meta_type const& get_meta(mapnik::keys key)
{
    return key_meta[static_cast<int>(key)];
}

mapnik::keys get_key(std::string const& name)
{
   std::string name_copy(name);
   boost::algorithm::replace_all(name_copy,"_","-");
   for (unsigned i=0;i<static_cast<unsigned>(keys::MAX_SYMBOLIZER_KEY);++i)
   {
        property_meta_type const& item = key_meta[i];
        if (name_copy == std::get<0>(item))
        {
            return static_cast<mapnik::keys>(i);
        }
   }
   throw std::runtime_error("no key found for '" + name + "'");
   return static_cast<mapnik::keys>(0);
}

}