Merge branch 'master' into python-textplacement

include/mapnik/attribute_collector.hpp

@@ -88,8 +88,9 @@ struct symbolizer_attributes : public boost::static_visitor<>
 
     void operator () (text_symbolizer const& sym)
     {
-        std::set<expression_ptr>::const_iterator it;
-        std::set<expression_ptr> expressions = sym.get_placement_options()->get_all_expressions();
+        expression_set::const_iterator it;
+        expression_set expressions;
+        sym.get_placement_options()->add_expressions(expressions);
         expression_attributes f_attr(names_);
         for (it=expressions.begin(); it != expressions.end(); it++)
         {
@@ -141,8 +142,9 @@ struct symbolizer_attributes : public boost::static_visitor<>
 
     void operator () (shield_symbolizer const& sym)
     {
-        std::set<expression_ptr>::const_iterator it;
-        std::set<expression_ptr> expressions = sym.get_placement_options()->get_all_expressions();
+        expression_set::const_iterator it;
+        expression_set expressions;
+        sym.get_placement_options()->add_expressions(expressions);
         expression_attributes f_attr(names_);
         for (it=expressions.begin(); it != expressions.end(); it++)
         {

include/mapnik/text_placements.hpp

@@ -91,7 +91,7 @@ struct text_symbolizer_properties
     formating::node_ptr format_tree() const;
     /** Get a list of all expressions used in any placement.
      * This function is used to collect attributes. */
-    std::set<expression_ptr> get_all_expressions() const;
+    void add_expressions(expression_set &output) const;
 
     //Per symbolizer options
     expression_ptr orientation;
@@ -236,7 +236,7 @@ public:
     /** Get a list of all expressions used in any placement.
      * This function is used to collect attributes.
      */
-    virtual std::set<expression_ptr> get_all_expressions();
+    virtual void add_expressions(expression_set &output);
 
     /** Destructor. */
     virtual ~text_placements() {}

include/mapnik/text_placements_list.hpp

@@ -35,7 +35,7 @@ public:
     text_placements_list();
     text_placement_info_ptr get_placement_info(
         double scale_factor, dimension_type dim, bool has_dimensions) const;
-    virtual std::set<expression_ptr> get_all_expressions();
+    virtual void add_expressions(expression_set &output);
     text_symbolizer_properties & add();
     text_symbolizer_properties & get(unsigned i);
     unsigned size() const;

include/mapnik/text_processing.hpp

@@ -42,6 +42,8 @@ namespace mapnik
 class processed_text;
 struct char_properties;
 
+typedef std::set<expression_ptr> expression_set;
+
 enum label_placement_enum {
     POINT_PLACEMENT,
     LINE_PLACEMENT,
@@ -104,7 +106,7 @@ public:
     virtual void to_xml(boost::property_tree::ptree &xml) const;
     static node_ptr from_xml(boost::property_tree::ptree const& xml);
     virtual void apply(char_properties const& p, Feature const& feature, processed_text &output) const = 0;
-    virtual void add_expressions(std::set<expression_ptr> &expressions) const;
+    virtual void add_expressions(expression_set &output) const;
 };
 
 class list_node: public node {
@@ -112,7 +114,7 @@ public:
     list_node() : node(), children_() {}
     virtual void to_xml(boost::property_tree::ptree &xml) const;
     virtual void apply(char_properties const& p, Feature const& feature, processed_text &output) const;
-    virtual void add_expressions(std::set<expression_ptr> &expressions) const;
+    virtual void add_expressions(expression_set &output) const;
 
     void push_back(node_ptr n);
     void set_children(std::vector<node_ptr> const& children);
@@ -128,7 +130,7 @@ public:
     void to_xml(boost::property_tree::ptree &xml) const;
     static node_ptr from_xml(boost::property_tree::ptree const& xml);
     virtual void apply(char_properties const& p, Feature const& feature, processed_text &output) const;
-    virtual void add_expressions(std::set<expression_ptr> &expressions) const;
+    virtual void add_expressions(expression_set &output) const;
 
     void set_text(expression_ptr text);
     expression_ptr get_text() const;

src/text_placements.cpp

@@ -217,11 +217,10 @@ void text_symbolizer_properties::to_xml(boost::property_tree::ptree &node, bool
 }
 
 
-std::set<expression_ptr> text_symbolizer_properties::get_all_expressions() const
+void text_symbolizer_properties::add_expressions(expression_set &output) const
 {
-    std::set<expression_ptr> result;
-    if (tree_) tree_->add_expressions(result);
-    return result;
+    output.insert(orientation);
+    if (tree_) tree_->add_expressions(output);
 }
 
 void text_symbolizer_properties::set_old_style_expression(expression_ptr expr)
@@ -356,13 +355,9 @@ text_placements::text_placements() : properties()
 {
 }
 
-std::set<expression_ptr> text_placements::get_all_expressions()
+void text_placements::add_expressions(expression_set &output)
 {
-    std::set<expression_ptr> result, tmp;
-    tmp = properties.get_all_expressions();
-    result.insert(tmp.begin(), tmp.end());
-    result.insert(properties.orientation);
-    return result;
+    properties.add_expressions(output);
 }
 
 
@@ -566,21 +561,15 @@ text_placements_list::text_placements_list() : text_placements(), list_(0)
 
 }
 
-std::set<expression_ptr> text_placements_list::get_all_expressions()
+void text_placements_list::add_expressions(expression_set &output)
 {
-    std::set<expression_ptr> result, tmp;
-    tmp = properties.get_all_expressions();
-    result.insert(tmp.begin(), tmp.end());
-    result.insert(properties.orientation);
+    properties.add_expressions(output);
 
     std::vector<text_symbolizer_properties>::const_iterator it;
     for (it=list_.begin(); it != list_.end(); it++)
     {
-        tmp = it->get_all_expressions();
-        result.insert(tmp.begin(), tmp.end());
-        result.insert(it->orientation);
+        it->add_expressions(output);
     }
-    return result;
 }
 
 unsigned text_placements_list::size() const

src/text_processing.cpp

@@ -75,7 +75,7 @@ node_ptr node::from_xml(boost::property_tree::ptree const& xml)
     }
 }
 
-void node::add_expressions(std::set<expression_ptr> &expressions) const
+void node::add_expressions(expression_set &output) const
 {
     //Do nothing by default
 }
@@ -104,13 +104,13 @@ void list_node::apply(char_properties const& p, Feature const& feature, processe
 }
 
 
-void list_node::add_expressions(std::set<expression_ptr> &expressions) const
+void list_node::add_expressions(expression_set &output) const
 {
     std::vector<node_ptr>::const_iterator itr = children_.begin();
     std::vector<node_ptr>::const_iterator end = children_.end();
     for (;itr != end; itr++)
     {
-        (*itr)->add_expressions(expressions);
+        (*itr)->add_expressions(output);
     }
 }
 
@@ -179,9 +179,9 @@ void text_node::apply(char_properties const& p, Feature const& feature, processe
 }
 
 
-void text_node::add_expressions(std::set<expression_ptr> &expressions) const
+void text_node::add_expressions(expression_set &output) const
 {
-    if (text_) expressions.insert(text_);
+    if (text_) output.insert(text_);
 }