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#ifndef SASS_EMITTER_H 
#define SASS_EMITTER_H 
 
#include <string> 
#include "sass.hpp" 
#include "sass/base.h" 
#include "source_map.hpp" 
#include "ast_fwd_decl.hpp" 
 
namespace Sass { 
  class Context; 
 
  class Emitter { 
 
    public: 
      Emitter(struct Sass_Output_Options& opt); 
      virtual ~Emitter() { } 
 
    protected: 
      OutputBuffer wbuf; 
    public: 
      const std::string& buffer(void) { return wbuf.buffer; } 
      const SourceMap smap(void) { return wbuf.smap; } 
      const OutputBuffer output(void) { return wbuf; } 
      // proxy methods for source maps 
      void add_source_index(size_t idx); 
      void set_filename(const std::string& str); 
      void add_open_mapping(const AST_Node_Ptr node); 
      void add_close_mapping(const AST_Node_Ptr node); 
      void schedule_mapping(const AST_Node_Ptr node); 
      std::string render_srcmap(Context &ctx); 
      ParserState remap(const ParserState& pstate); 
 
    public: 
      struct Sass_Output_Options& opt; 
      size_t indentation; 
      size_t scheduled_space; 
      size_t scheduled_linefeed; 
      bool scheduled_delimiter; 
      AST_Node_Ptr scheduled_crutch; 
      AST_Node_Ptr scheduled_mapping; 
 
    public: 
      // output strings different in comments 
      bool in_comment; 
      // selector list does not get linefeeds 
      bool in_wrapped; 
      // lists always get a space after delimiter 
      bool in_media_block; 
      // nested list must not have parentheses 
      bool in_declaration; 
      // nested lists need parentheses 
      bool in_space_array; 
      bool in_comma_array; 
 
    public: 
      // return buffer as std::string 
      std::string get_buffer(void); 
      // flush scheduled space/linefeed 
      Sass_Output_Style output_style(void) const; 
      // add outstanding linefeed 
      void finalize(bool final = true); 
      // flush scheduled space/linefeed 
      void flush_schedules(void); 
      // prepend some text or token to the buffer 
      void prepend_string(const std::string& text); 
      void prepend_output(const OutputBuffer& out); 
      // append some text or token to the buffer 
      void append_string(const std::string& text); 
      // append a single character to buffer 
      void append_char(const char chr); 
      // append some white-space only text 
      void append_wspace(const std::string& text); 
      // append some text or token to the buffer 
      // this adds source-mappings for node start and end 
      void append_token(const std::string& text, const AST_Node_Ptr node); 
      // query last appended character 
      char last_char(); 
 
    public: // syntax sugar 
      void append_indentation(); 
      void append_optional_space(void); 
      void append_mandatory_space(void); 
      void append_special_linefeed(void); 
      void append_optional_linefeed(void); 
      void append_mandatory_linefeed(void); 
      void append_scope_opener(AST_Node_Ptr node = 0); 
      void append_scope_closer(AST_Node_Ptr node = 0); 
      void append_comma_separator(void); 
      void append_colon_separator(void); 
      void append_delimiter(void); 
 
  }; 
 
} 
 
#endif