mapnik/src/text_placements/list.cpp
2012-03-13 07:58:38 -07:00

111 lines
3.1 KiB
C++

/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2012 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/text_placements/list.hpp>
#include <mapnik/xml_node.hpp>
//boost
#include <boost/make_shared.hpp>
namespace mapnik
{
bool text_placement_info_list::next()
{
if (state == 0) {
properties = parent_->defaults;
} else {
if (state-1 >= parent_->list_.size()) return false;
properties = parent_->list_[state-1];
}
state++;
return true;
}
text_symbolizer_properties & text_placements_list::add()
{
if (list_.size()) {
text_symbolizer_properties &last = list_.back();
list_.push_back(last); //Preinitialize with old values
} else {
list_.push_back(defaults);
}
return list_.back();
}
text_symbolizer_properties & text_placements_list::get(unsigned i)
{
return list_[i];
}
/***************************************************************************/
text_placement_info_ptr text_placements_list::get_placement_info(double scale_factor) const
{
return boost::make_shared<text_placement_info_list>(this, scale_factor);
}
text_placements_list::text_placements_list() : text_placements(), list_(0)
{
}
void text_placements_list::add_expressions(expression_set &output)
{
defaults.add_expressions(output);
std::vector<text_symbolizer_properties>::const_iterator it;
for (it=list_.begin(); it != list_.end(); it++)
{
it->add_expressions(output);
}
}
unsigned text_placements_list::size() const
{
return list_.size();
}
text_placements_ptr text_placements_list::from_xml(xml_node const &xml, fontset_map const & fontsets)
{
using boost::property_tree::ptree;
text_placements_list *list = new text_placements_list;
text_placements_ptr ptr = text_placements_ptr(list);
list->defaults.from_xml(xml, fontsets);
xml_node::const_iterator itr = xml.begin();
xml_node::const_iterator end = xml.end();
for( ;itr != end; ++itr)
{
if (itr->is_text() || !itr->is("Placement")) continue;
text_symbolizer_properties &p = list->add();
p.from_xml(*itr, fontsets);
//TODO: if (strict_ &&
// !p.format.fontset.size())
// ensure_font_face(p.format.face_name);
}
return ptr;
}
} //ns mapnik