ds9lex.h

Go to the documentation of this file.

#ifndef DISPLAY_DS9_DS9LEX_H_
#define DISPLAY_DS9_DS9LEX_H_

// Flex expects the signature of yylex to be defined in the macro YY_DECL, and
// the C++ parser expects it to be declared. We can factor both as follows.
#ifndef YY_DECL

#define YY_DECL                                                                 \
    casa::viewer::ds9parse::token_type                                          \
    casa::viewer::ds9lex::lex( casa::viewer::ds9parse::semantic_type* yylval,   \
                               casa::viewer::ds9parse::location_type* /*yylloc*/        \
                             )
#endif

// including without guard results in yyFlexLexer being multiply defined when
// compiling the scanner...
#ifndef __FLEX_LEXER_H
#define yyFlexLexer ds9lex_FlexLexer
#include <display/ds9/ds9FlexLexer.h>
#undef yyFlexLexer
#endif

#include <display/ds9/ds9context.h>
#include <display/ds9/ds9parse.hh>

namespace casa {
        namespace viewer {

                class Region;

                // Scanner is a derived class to add some extra function to the scanner
                // class. Flex itself creates a class named yyFlexLexer, which is renamed using
                // macros to ds9lex_FlexLexer. However we change the context of the generated
                // yylex() function to be contained within the ds9lex class. This is required
                // because the yylex() defined in ds9lex_display/ds9/ds9FlexLexer.has no parameters. */
                class ds9lex : public ds9lex_FlexLexer {
                public:
                        // Create a new scanner object. The streams arg_yyin and arg_yyout default
                        // to cin and cout, but that assignment is only made when initializing in
                        // yylex().
                        ds9lex( std::istream* yyin=0, std::ostream* yyout=0 ) : ds9lex_FlexLexer( yyin, yyout ) { }
                        ~ds9lex( ) { }

                        // This is the main lexing function. It is generated by flex according to
                        // the macro declaration YY_DECL above. The generated bison parser then
                        // calls this virtual function to fetch new tokens.
                        virtual ds9parse::token_type lex( ds9parse::semantic_type* yylval, ds9parse::location_type* /*yylloc*/ );

                        void begin(int,int);

                        // Enable debug output (via arg_yyout) if compiled into the scanner.
                        void set_debug(bool b);

                        void discard( int );
                };
        }
}


class CallBack {
public:
        enum { SELECTCB, UNSELECTCB, HIGHLITECB, UNHIGHLITECB,
               MOVEBEGINCB, MOVECB, MOVEENDCB, EDITBEGINCB,
               EDITCB, EDITENDCB, ROTATEBEGINCB, ROTATECB,
               ROTATEENDCB, DELETECB, TEXTCB, COLORCB,
               LINEWIDTHCB, PROPERTYCB, FONTCB, KEYCB,
               UPDATECB
             };
};

class Marker {
public:
        // Select-- user may select the marker
        // Highlite-- user may highlite the marker
        // Edit-- user may edit the marker
        // Move-- user may move the marker
        // Rotate-- user may rotate the marker
        // Delete-- user may delete the marker
        // Fixed-- marker is fixed in size (not scaled based on zoom)
        // Include-- marker is 'included' or 'excluded' ie '+' or '-'
        // Source-- marker is a 'source' or 'background' marker
        // Dash-- render with dashed line
        enum Property { NONE=0, SELECT=1, HIGHLITE=2, EDIT=4, MOVE=8, ROTATE=16,
                        DELETE=32, FIXED=64, INCLUDE=128, SOURCE=256, DASH=512
                      };
};


typedef std::list<casa::viewer::Region*> bison_region_list;
#endif