Filters: register existing filters with the registry

src/filters.cc

@@ -1,5 +1,7 @@
 #include "filters.hh"
 
+#include "filter_registry.hh"
+
 namespace Kakoune
 {
 
@@ -129,4 +131,26 @@ void show_line_numbers(DisplayBuffer& display_buffer)
     }
 }
 
+template<void (*filter_func)(DisplayBuffer&)>
+class SimpleFilterFactory
+{
+public:
+    SimpleFilterFactory(const std::string& id) : m_id(id) {}
+
+    FilterAndId operator()(const FilterParameters& params) const
+    {
+        return FilterAndId(m_id, FilterFunc(filter_func));
+    }
+private:
+    std::string m_id;
+};
+
+void register_filters()
+{
+    FilterRegistry& registry = FilterRegistry::instance();
+    
+    registry.register_factory("line_numbers", SimpleFilterFactory<show_line_numbers>("line_numbers"));
+    registry.register_factory("hlcpp", SimpleFilterFactory<colorize_cplusplus>("hlcpp"));
+}
+
 }

src/filters.hh

@@ -15,6 +15,8 @@ void colorize_cplusplus(DisplayBuffer& display_buffer);
 void expand_tabulations(DisplayBuffer& display_buffer);
 void show_line_numbers(DisplayBuffer& display_buffer);
 
+void register_filters();
+
 }
 
 #endif // filters_hh_INCLUDED

src/main.cc

@@ -8,6 +8,8 @@
 #include "selectors.hh"
 #include "assert.hh"
 #include "debug.hh"
+#include "filters.hh"
+#include "filter_registry.hh"
 
 #include <unordered_map>
 #include <map>
@@ -573,6 +575,7 @@ int main(int argc, char* argv[])
     CommandManager  command_manager;
     BufferManager   buffer_manager;
     RegisterManager register_manager;
+    FilterRegistry  filter_registry;
 
     command_manager.register_command(std::vector<std::string>{ "e", "edit" }, edit,
                                      PerArgumentCommandCompleter{ complete_filename });
@@ -583,6 +586,8 @@ int main(int argc, char* argv[])
     command_manager.register_command(std::vector<std::string>{ "b", "buffer" }, show_buffer,
                                      PerArgumentCommandCompleter { complete_buffername });
 
+    register_filters();
+
     try
     {
         auto buffer = (argc > 1) ? create_buffer_from_file(argv[1]) : new Buffer("*scratch*", Buffer::Type::Scratch);