bool group_symbolizer_helper::find_line_placements(T & path)
{
if (box_elements_.empty()) return true;
vertex_cache pp(path);
bool success = false;
while (pp.next_subpath())
{
if (pp.length() <= 0.001)
{
success = check_point_placement(pp.current_position()) || success;
continue;
}
double spacing = get_spacing(pp.length());
pp.forward(spacing/2.0);
do
{
tolerance_iterator tolerance_offset(text_props_->label_position_tolerance * scale_factor_, spacing); //TODO: Handle halign
while (tolerance_offset.next())
{
vertex_cache::scoped_state state(pp);
if (pp.move(tolerance_offset.get()) && check_point_placement(pp.current_position()))
{
success = true;
break;
}
}
} while (pp.forward(spacing));
}
return success;
}
pixel_position_list const& group_symbolizer_helper::get()
{
results_.clear();
if (point_placement_)
{
for (pixel_position const& point : points_)
{
check_point_placement(point);
}
}
else
{
using apply_find_line_placements = detail::apply_find_line_placements<group_symbolizer_helper>;
for (auto const& geom : geometries_to_process_)
{
// TODO to support clipped geometries this needs to use
// vertex_converters
apply_find_line_placements apply(t_, prj_trans_, *this);
mapnik::util::apply_visitor(geometry::vertex_processor<apply_find_line_placements>(apply), geom);
}
}
return results_;
}
pixel_position_list const& group_symbolizer_helper::get()
{
results_.clear();
if (point_placement_)
{
for (pixel_position const& point : points_)
{
check_point_placement(point);
}
}
else
{
for (auto const& geom : geometries_to_process_)
{
// TODO to support clipped geometries this needs to use
// vertext_converters
using path_type = transform_path_adapter<view_transform,geometry_type>;
path_type path(t_, *geom, prj_trans_);
find_line_placements(path);
}
}
return results_;
}
