Make code easier to read by using std::pair instead of boost::tuple for position.

bindings/python/mapnik_shield_symbolizer.cpp

@@ -37,6 +37,7 @@ using mapnik::path_expression_ptr;
 using mapnik::guess_type;
 using mapnik::expression_ptr;
 using mapnik::parse_path;
+using mapnik::position;
 
 
 namespace {
@@ -44,8 +45,8 @@ using namespace boost::python;
 
 tuple get_shield_displacement(const shield_symbolizer& s)
 {
-    boost::tuple<double,double> pos = s.get_shield_displacement();
+    position const& pos = s.get_shield_displacement();
-    return boost::python::make_tuple(boost::get<0>(pos),boost::get<1>(pos));
+    return boost::python::make_tuple(pos.first, pos.second);
 }
 
 void set_shield_displacement(shield_symbolizer & s, boost::python::tuple arg)
@@ -55,8 +56,8 @@ void set_shield_displacement(shield_symbolizer & s, boost::python::tuple arg)
 
 tuple get_text_displacement(const shield_symbolizer& t)
 {
-    boost::tuple<double,double> pos = t.get_displacement();
+    position const& pos = t.get_displacement();
-    return boost::python::make_tuple(boost::get<0>(pos),boost::get<1>(pos));
+    return boost::python::make_tuple(pos.first, pos.second);
 }
 
 void set_text_displacement(shield_symbolizer & t, boost::python::tuple arg)

bindings/python/mapnik_text_symbolizer.cpp

@@ -39,8 +39,8 @@ using namespace boost::python;
 
 tuple get_text_displacement(const text_symbolizer& t)
 {
-    position pos = t.get_displacement();
+    mapnik::position const& pos = t.get_displacement();
-    return boost::python::make_tuple(boost::get<0>(pos),boost::get<1>(pos));
+    return boost::python::make_tuple(pos.first, pos.second);
 }
 
 void set_text_displacement(text_symbolizer & t, boost::python::tuple arg)

include/mapnik/shield_symbolizer.hpp

@@ -51,11 +51,11 @@ struct MAPNIK_DECL shield_symbolizer : public text_symbolizer,
     bool get_unlock_image() const;              // image is not locked to the text placement
     void set_unlock_image(bool unlock_image);
     void set_shield_displacement(double shield_dx,double shield_dy);
-    boost::tuple<double,double> const& get_shield_displacement() const;
+    position const& get_shield_displacement() const;
     
 private:
     bool unlock_image_;
-    boost::tuple<double,double> shield_displacement_;
+    position shield_displacement_;
 };
 }
 

include/mapnik/symbolizer_helpers.hpp

@@ -36,8 +36,6 @@
 
 namespace mapnik {
 
-typedef std::pair<double, double> point_type;
-
 /** Helper object that does all the TextSymbolizer placment finding
   * work except actually rendering the object. */
 template <typename FaceManagerT, typename DetectorT>
@@ -100,8 +98,8 @@ protected:
     /* Using list instead of vector, because we delete random elements and need iterators to stay valid. */
     std::list<geometry_type*> geometries_to_process_;
     std::list<geometry_type*>::iterator geo_itr_;
-    std::list<point_type> points_;
+    std::list<position> points_;
-    std::list<point_type>::iterator point_itr_;
+    std::list<position>::iterator point_itr_;
     double angle_;
     string_info *info_;
     bool placement_valid_;

include/mapnik/text_placements.hpp

@@ -46,7 +46,7 @@ namespace mapnik {
 
 class text_placements;
 
-typedef boost::tuple<double,double> position;
+typedef std::pair<double,double> position;
 
 enum label_placement_enum {
     POINT_PLACEMENT,

src/placement_finder.cpp

@@ -291,9 +291,9 @@ void placement_finder<DetectorT>::init_alignment()
 {
     valign_ = p.valign;
     if (valign_ == V_AUTO) {
-        if (p.displacement.get<1>() > 0.0)
+        if (p.displacement.second > 0.0)
             valign_ = V_BOTTOM;
-        else if (p.displacement.get<1>() < 0.0)
+        else if (p.displacement.second < 0.0)
             valign_ = V_TOP;
         else
             valign_ = V_MIDDLE;
@@ -301,9 +301,9 @@ void placement_finder<DetectorT>::init_alignment()
 
     halign_ = p.halign;
     if (halign_ == H_AUTO) {
-        if (p.displacement.get<0>() > 0.0)
+        if (p.displacement.first > 0.0)
             halign_ = H_RIGHT;
-        else if (p.displacement.get<0>() < 0.0)
+        else if (p.displacement.first < 0.0)
             halign_ = H_LEFT;
         else
             halign_ = H_MIDDLE;
@@ -333,8 +333,8 @@ void placement_finder<DetectorT>::adjust_position(text_path *current_placement,
         current_placement->starting_x += 0.5 * string_width_;  // move center right by 1/2 the string width
 
     // adjust text envelope position by user's x-y displacement (dx, dy)
-    current_placement->starting_x += pi.get_scale_factor() * boost::tuples::get<0>(p.displacement);
+    current_placement->starting_x += pi.get_scale_factor() * p.displacement.first;
-    current_placement->starting_y += pi.get_scale_factor() * boost::tuples::get<1>(p.displacement);
+    current_placement->starting_y += pi.get_scale_factor() * p.displacement.second;
 
 }
 
@@ -537,7 +537,7 @@ void placement_finder<DetectorT>::find_line_placements(PathT & shape_path)
 
     double distance = 0.0;
 
-    double displacement = boost::tuples::get<1>(p.displacement); // displace by dy
+    double displacement = p.displacement.second; // displace by dy
 
     //Calculate a target_distance that will place the labels centered evenly rather than offset from the start of the linestring
     if (total_distance < string_width_) //Can't place any strings

src/save_map.cpp

@@ -199,7 +199,7 @@ public:
         // maybe add a real, explicit default-ctor?
 
         
-        shield_symbolizer dfl(expression_ptr(), "<no default>", 0, color(0,0,0), path_expression_ptr());
+        shield_symbolizer dfl;
         
         if (sym.get_unlock_image() != dfl.get_unlock_image() || explicit_defaults_)
         {
@@ -210,13 +210,13 @@ public:
             set_attr(sym_node, "text-opacity", sym.get_text_opacity());
         }
         position displacement = sym.get_shield_displacement();
-        if ( displacement.get<0>() != dfl.get_shield_displacement().get<0>() || explicit_defaults_ )
+        if (displacement.first != dfl.get_shield_displacement().first || explicit_defaults_)
         {
-            set_attr( sym_node, "shield-dx", displacement.get<0>() );
+            set_attr(sym_node, "shield-dx", displacement.first);
         }
-        if ( displacement.get<1>() != dfl.get_shield_displacement().get<1>() || explicit_defaults_ )
+        if (displacement.second != dfl.get_shield_displacement().second || explicit_defaults_)
         {
-            set_attr( sym_node, "shield-dy", displacement.get<1>() );
+            set_attr(sym_node, "shield-dy", displacement.second);
         }
 
     }

src/shield_symbolizer.cpp

@@ -38,7 +38,7 @@ shield_symbolizer::shield_symbolizer(text_placements_ptr placements)
     : text_symbolizer(placements),
       symbolizer_with_image(),
       unlock_image_(false),
-      shield_displacement_(boost::make_tuple<double,double>(0,0))
+      shield_displacement_(0,0)
 {
 }
 
@@ -51,7 +51,7 @@ shield_symbolizer::shield_symbolizer(
     : text_symbolizer(name, face_name, size, fill),
       symbolizer_with_image(file),
       unlock_image_(false),
-      shield_displacement_(boost::make_tuple<double,double>(0,0))
+      shield_displacement_(0, 0)
 {
 }
 
@@ -63,7 +63,7 @@ shield_symbolizer::shield_symbolizer(
     : text_symbolizer(name, size, fill),
       symbolizer_with_image(file),
       unlock_image_(false),
-      shield_displacement_(boost::make_tuple<double,double>(0,0))
+      shield_displacement_(0, 0)
 {
 }
 
@@ -79,10 +79,10 @@ bool shield_symbolizer::get_unlock_image() const
 
 void shield_symbolizer::set_shield_displacement(double shield_dx,double shield_dy)
 {
-    shield_displacement_ = boost::make_tuple(shield_dx,shield_dy);
+    shield_displacement_ = std::make_pair(shield_dx, shield_dy);
 }
                       
-boost::tuple<double,double> const& shield_symbolizer::get_shield_displacement() const
+position const& shield_symbolizer::get_shield_displacement() const
 {
     return shield_displacement_;
 }

src/symbolizer_helpers.cpp

@@ -63,7 +63,7 @@ text_placement_info_ptr text_symbolizer_helper<FaceManagerT, DetectorT>::get_poi
         placement_finder<DetectorT> finder(*placement_, *info_, detector_, dims_);
         finder.find_point_placement(point_itr_->first, point_itr_->second, angle_);
         //Keep reference to current object so we can delete it.
-        std::list<point_type>::iterator current_object = point_itr_;
+        std::list<position>::iterator current_object = point_itr_;
         point_itr_++;
         if (placement_->placements.size())
         {
@@ -208,13 +208,13 @@ text_placement_info_ptr shield_symbolizer_helper<FaceManagerT, DetectorT>::get_p
             continue; //Reexecute size check
         }
         position const& pos = placement_->properties.displacement;
-        double label_x = point_itr_->first + boost::get<0>(shield_pos);
+        double label_x = point_itr_->first + shield_pos.first;
-        double label_y = point_itr_->second + boost::get<1>(shield_pos);
+        double label_y = point_itr_->second + shield_pos.second;
 
         placement_finder<DetectorT> finder(*placement_, *info_, detector_, dims_);
         finder.find_point_placement(label_x, label_y, angle_);
         //Keep reference to current object so we can delete it.
-        std::list<point_type>::iterator current_object = point_itr_;
+        std::list<position>::iterator current_object = point_itr_;
         point_itr_++;
         if (!placement_->placements.size())
         {
@@ -229,8 +229,8 @@ text_placement_info_ptr shield_symbolizer_helper<FaceManagerT, DetectorT>::get_p
         {
             // center image at text center position
             // remove displacement from image label
-            double lx = x - boost::get<0>(pos);
+            double lx = x - pos.first;
-            double ly = y - boost::get<1>(pos);
+            double ly = y - pos.second;
             marker_x_ = int(floor(lx - (0.5 * marker_w_))) + 1;
             marker_y_ = int(floor(ly - (0.5 * marker_h_))) + 1;
             marker_ext_.re_center(lx, ly);
@@ -266,10 +266,10 @@ text_placement_info_ptr shield_symbolizer_helper<FaceManagerT, DetectorT>::get_l
     TODO: Not supported by placement_finder atm
     position const& pos = placement_->properties.displacement;
     text_placement.additional_boxes.push_back(
-       box2d<double>(-0.5 * label_ext.width() - boost::get<0>(pos),
+       box2d<double>(-0.5 * label_ext.width() - pos.first,
-                     -0.5 * label_ext.height() - boost::get<1>(pos),
+                     -0.5 * label_ext.height() - pos.second,
-                     0.5 * label_ext.width() - boost::get<0>(pos),
+                     0.5 * label_ext.width() - pos.first,
-                     0.5 * label_ext.height() - boost::get<1>(pos)));
+                     0.5 * label_ext.height() - pos.second));
 #endif
     return text_symbolizer_helper<FaceManagerT, DetectorT>::get_line_placement();
 }
@@ -319,8 +319,8 @@ std::pair<int, int> shield_symbolizer_helper<FaceManagerT, DetectorT>::get_marke
         double x = floor(p.starting_x);
         double y = floor(p.starting_y);
 
-        double lx = x - boost::get<0>(pos);
+        double lx = x - pos.first;
-        double ly = y - boost::get<1>(pos);
+        double ly = y - pos.second;
         int px = int(floor(lx - (0.5*marker_w_))) + 1;
         int py = int(floor(ly - (0.5*marker_h_))) + 1;
         marker_ext_.re_center(lx, ly);

src/text_placements.cpp

@@ -95,9 +95,9 @@ void text_symbolizer_properties::from_xml(boost::property_tree::ptree const &sym
     optional<std::string> orientation_ = get_opt_attr<std::string>(sym, "orientation");
     if (orientation_) orientation = parse_expression(*orientation_, "utf8");
     optional<double> dx = get_opt_attr<double>(sym, "dx");
-    if (dx) displacement.get<0>() = *dx;
+    if (dx) displacement.first = *dx;
     optional<double> dy = get_opt_attr<double>(sym, "dy");
-    if (dy) displacement.get<1>() = *dy;
+    if (dy) displacement.second = *dy;
     optional<double> max_char_angle_delta_ = get_opt_attr<double>(sym, "max-char-angle-delta");
     if (max_char_angle_delta_) max_char_angle_delta=(*max_char_angle_delta_)*(M_PI/180);
     processor.from_xml(sym, fontsets);
@@ -118,13 +118,13 @@ void text_symbolizer_properties::to_xml(boost::property_tree::ptree &node, bool
         }
     }
 
-    if (displacement.get<0>() != dfl.displacement.get<0>() || explicit_defaults)
+    if (displacement.first != dfl.displacement.first || explicit_defaults)
     {
-        set_attr(node, "dx", displacement.get<0>());
+        set_attr(node, "dx", displacement.first);
     }
-    if (displacement.get<1>() != dfl.displacement.get<1>() || explicit_defaults)
+    if (displacement.second != dfl.displacement.second || explicit_defaults)
     {
-        set_attr(node, "dy", displacement.get<1>());
+        set_attr(node, "dy", displacement.second);
     }
     if (label_placement != dfl.label_placement || explicit_defaults)
     {
@@ -389,36 +389,28 @@ bool text_placement_info_simple::next_position_only()
         displacement = pdisp;
         break;
     case NORTH:
-        displacement = boost::make_tuple(0, -abs(pdisp.get<1>()));
+        displacement = std::make_pair(0, -abs(pdisp.second));
         break;
     case EAST:
-        displacement = boost::make_tuple(abs(pdisp.get<0>()), 0);
+        displacement = std::make_pair(abs(pdisp.first), 0);
         break;
     case SOUTH:
-        displacement = boost::make_tuple(0, abs(pdisp.get<1>()));
+        displacement = std::make_pair(0, abs(pdisp.second));
         break;
     case WEST:
-        displacement = boost::make_tuple(-abs(pdisp.get<0>()), 0);
+        displacement = std::make_pair(-abs(pdisp.first), 0);
         break;
     case NORTHEAST:
-        displacement = boost::make_tuple(
+        displacement = std::make_pair(abs(pdisp.first), -abs(pdisp.second));
-                     abs(pdisp.get<0>()),
-                    -abs(pdisp.get<1>()));
         break;
     case SOUTHEAST:
-        displacement = boost::make_tuple(
+        displacement = std::make_pair(abs(pdisp.first), abs(pdisp.second));
-                     abs(pdisp.get<0>()),
-                     abs(pdisp.get<1>()));
         break;
     case NORTHWEST:
-        displacement = boost::make_tuple(
+        displacement = std::make_pair(-abs(pdisp.first), -abs(pdisp.second));
-                    -abs(pdisp.get<0>()),
-                    -abs(pdisp.get<1>()));
         break;
     case SOUTHWEST:
-        displacement = boost::make_tuple(
+        displacement = std::make_pair(-abs(pdisp.first), abs(pdisp.second));
-                    -abs(pdisp.get<0>()),
-                     abs(pdisp.get<1>()));
         break;
     default:
         std::cerr << "WARNING: Unknown placement\n";

src/text_symbolizer.cpp

@@ -342,7 +342,7 @@ label_placement_e  text_symbolizer::get_label_placement() const
 
 void  text_symbolizer::set_displacement(double x, double y)
 {
-    placement_options_->properties.displacement = boost::make_tuple(x,y);
+    placement_options_->properties.displacement = std::make_pair(x,y);
 }
 
 void text_symbolizer::set_displacement(position const& p)