Separates Stencil::Outline into its own file

cpp/stencila/stencil-outline.hpp

@@ -0,0 +1,127 @@
+#include <stencila/stencil.hpp>
+
+namespace Stencila {
+
+struct Stencil::Outline {
+
+	struct Level {
+
+		Level* parent = nullptr;
+		int level = 0;
+		int index;
+		std::string label;
+		std::string id;
+		std::vector<Level*> sublevels;
+
+		~Level(void){
+			for(auto* level : sublevels) delete level;
+		}
+
+		Level* sublevel(void){
+			Level* sublevel = new Level;
+			sublevel->level = level+1;
+			sublevel->index = sublevels.size()+1;
+			sublevel->parent = this;
+			sublevels.push_back(sublevel);
+			return sublevel;
+		}
+
+		std::string path(const std::string& sep=".") const {
+			std::string path;
+			const Level* next = this;
+			while(next->index){
+				if(path.length()) path.insert(0,sep);
+				path.insert(0,string(next->index));
+				next = next->parent;
+			}
+			return path;
+		}
+
+		std::string id_(void) const {
+			return "section-"+path("-");
+		}
+
+		std::string class_(void) const {
+			return "level-"+string(level);
+		}
+
+		void heading(Node node){
+			if(label.length()==0){
+				// Get label for this level from the node
+				label = node.text();
+				// Check for node id, create one if needed, then add it to 
+				// level for links and to the section header
+				auto id_value = node.attr("id");
+				if(not id_value.length()){
+					id_value = id_();
+					node.attr("id",id_value);
+				}
+				id = id_value;
+				// Check for an existing label
+				std::string path_string = path();
+				Node label = node.select(".label");
+				if(not label){
+					// Prepend a label
+					label = node.prepend("span");
+					label.attr("class","label");
+					label.append("span",{{"class","path"}},path_string);
+					label.append("span",{{"class","separator"}}," ");
+				} else {
+					// Ammend the label
+					Node path = label.select(".path");
+					if(not path) path = label.append("span",{{"class","path"}},path_string);
+					else path.text(path_string);
+				}            
+				// Give class to the heading for styling
+				node.attr("class",class_());
+			}
+		}
+
+		void render(Node ul) const {  
+			Node li = ul.append(
+				"li",
+				{{"class",class_()}}
+			);
+			li.append(
+				"a",
+				{{"href","#"+id}},
+				path()+" "+label
+			);
+			for(auto* level : sublevels) level->render(ul);
+		}
+	};
+
+	Level* root;
+	Level* current;
+	Node node;
+
+	Outline(void){
+		root = new Level;
+		current = root;
+	}
+
+	~Outline(void){
+		if(root) delete root;
+	}
+
+	void enter(void){
+		current = current->sublevel();
+	}
+
+	void exit(void){
+		current = current->parent;
+	}
+
+	void heading(Node node){
+		current->heading(node);
+	}
+
+	void render(void){
+		if(node) {
+			Node ul = node.append("ul");
+			root->render(ul);
+		}
+	}
+};
+
+}

cpp/stencila/stencil-render.cpp

@@ -2,6 +2,7 @@
 #include <boost/regex.hpp>
 
 #include <stencila/stencil.hpp>
+#include <stencila/stencil-outline.hpp>
 #include <stencila/string.hpp>
 
 #include <iostream>
@@ -29,128 +30,6 @@ void Stencil::render_children(Node node, Context* context){
 	for(Node child : node.children()) render(child,context);
 }
 
-struct Stencil::Outline {
-
-	struct Level {
-
-		Level* parent = nullptr;
-		int level = 0;
-		int index;
-		std::string label;
-		std::string id;
-		std::vector<Level*> sublevels;
-
-		~Level(void){
-			for(auto* level : sublevels) delete level;
-		}
-
-		Level* sublevel(void){
-			Level* sublevel = new Level;
-			sublevel->level = level+1;
-			sublevel->index = sublevels.size()+1;
-			sublevel->parent = this;
-			sublevels.push_back(sublevel);
-			return sublevel;
-		}
-
-		std::string path(const std::string& sep=".") const {
-			std::string path;
-			const Level* next = this;
-			while(next->index){
-				if(path.length()) path.insert(0,sep);
-				path.insert(0,string(next->index));
-				next = next->parent;
-			}
-			return path;
-		}
-
-		std::string id_(void) const {
-			return "section-"+path("-");
-		}
-
-		std::string class_(void) const {
-			return "level-"+string(level);
-		}
-
-		void heading(Node node){
-			if(label.length()==0){
-				// Get label for this level from the node
-				label = node.text();
-				// Check for node id, create one if needed, then add it to 
-				// level for links and to the section header
-				auto id_value = node.attr("id");
-				if(not id_value.length()){
-					id_value = id_();
-					node.attr("id",id_value);
-				}
-				id = id_value;
-				// Check for an existing label
-				std::string path_string = path();
-				Node label = node.select(".label");
-				if(not label){
-					// Prepend a label
-					label = node.prepend("span");
-					label.attr("class","label");
-					label.append("span",{{"class","path"}},path_string);
-					label.append("span",{{"class","separator"}}," ");
-				} else {
-					// Ammend the label
-					Node path = label.select(".path");
-					if(not path) path = label.append("span",{{"class","path"}},path_string);
-					else path.text(path_string);
-				}            
-				// Give class to the heading for styling
-				node.attr("class",class_());
-			}
-		}
-
-		void render(Node ul) const {  
-			Node li = ul.append(
-				"li",
-				{{"class",class_()}}
-			);
-			li.append(
-				"a",
-				{{"href","#"+id}},
-				path()+" "+label
-			);
-			for(auto* level : sublevels) level->render(ul);
-		}
-	};
-
-	Level* root;
-	Level* current;
-	Node node;
-
-	Outline(void){
-		root = new Level;
-		current = root;
-	}
-
-	~Outline(void){
-		if(root) delete root;
-	}
-
-	void enter(void){
-		current = current->sublevel();
-	}
-
-	void exit(void){
-		current = current->parent;
-	}
-
-	void heading(Node node){
-		current->heading(node);
-	}
-
-	void render(void){
-		if(node) {
-			Node ul = node.append("ul");
-			root->render(ul);
-		}
-	}
-};
-
 void Stencil::render(Node node, Context* context){
 	try {
 		// Remove any existing error attribute

cpp/stencila/stencil.hpp

@@ -680,6 +680,8 @@ class Stencil : public Component, public Xml::Document {
 	/**
 	 * Outlining, including section numbering and table of content, handled
 	 * by `Outline` struct
+	 *
+	 * Implementation in `stencil-outline.hpp`.
 	 */
 	struct Outline;
 	Outline* outline_ = nullptr;