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#ifndef TEXO_INCLUDED_PRODUCER
#define TEXO_INCLUDED_PRODUCER
#include "exporter.hpp"
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Texo Producer
* Texo interface for producing output based on inner representation.
*/
class TexoProducer {
public:
TexoProducer(TexoExporter &exporter); // Setup exporter used for output.
virtual bool End(); // Notify producer, what input is ended.
virtual bool Put(char c); // Output c, possibly escaping it.
// Block Signal Handlers
// Only one can be opened at one moment.
virtual bool Header(int level);
virtual bool Code();
virtual bool Paragraph() = 0;
virtual bool Quote();
// Modificator Signal Handlers
// Independently switch one of text modificators.
virtual bool Bold();
virtual bool Italic();
virtual bool Mono();
virtual bool Strike();
virtual bool Underline();
// Switch link to given or switch it off, if no one is given.
virtual bool Link(const char *link, const char *title);
virtual bool Link();
virtual bool PutImage(const char *src, const char *alt, const char *title);
virtual bool PutHorizontalRule();
protected:
TexoExporter &exporter;
};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Texo Strict Producer
* Converts switch-signal interface of Texo Producer into
* sequence of start/close signals with disjoint modificator sections,
* as well as block sections, which are provided on top level.
*/
class TexoProducerStrict: public TexoProducer {
public:
TexoProducerStrict(TexoExporter & exporter);
bool End();
bool Put(char c);
bool Header(int level);
bool Code();
bool Paragraph();
bool Quote();
bool Bold();
bool Italic();
bool Mono();
bool Strike();
bool Underline();
bool Link(const char *path, const char *title);
bool Link();
bool PutImage(const char *src, const char *alt, const char *title);
bool PutHorizontalRule();
protected:
virtual bool TruePut(char c) = 0;
virtual bool StartHeader(int level) = 0;
virtual bool CloseHeader(int level) = 0;
virtual bool StartCode() = 0;
virtual bool CloseCode() = 0;
virtual bool StartParagraph() = 0;
virtual bool CloseParagraph() = 0;
virtual bool StartQuote() = 0;
virtual bool CloseQuote() = 0;
virtual bool StartBold() = 0;
virtual bool CloseBold() = 0;
virtual bool StartItalic() = 0;
virtual bool CloseItalic() = 0;
virtual bool StartMono() = 0;
virtual bool CloseMono() = 0;
virtual bool StartStrike() = 0;
virtual bool CloseStrike() = 0;
virtual bool StartUnderline() = 0;
virtual bool CloseUnderline() = 0;
virtual bool StartLink(const char *link, const char *title) = 0;
virtual bool CloseLink(const char *link, const char *title) = 0;
virtual bool TruePutImage(const char *src,
const char *alt,
const char *title) = 0;
virtual bool TruePutHorizontalRule() = 0;
private:
enum Block { block_none = 0, code, header, paragraph, quote } block;
int header_level;
enum Mod { bold, italic, link, mono, strike, underline } mods[6];
int opened;
const char **link_link;
const char **link_title;
bool Start(); // Open paragraph if no block is opened.
bool CloseBlock();
bool SwitchMod(Mod mod);
bool OpenMod(Mod mod);
bool CloseMod(Mod mod);
// Close all opened mods sequentially, down to (including) last,
// returning count of closed mods, or negative number in case of error.
int CloseMods(Mod last);
// Close all opened mods.
bool CloseMods();
bool Reopen(int closed);
bool IsOpened(Mod mod) const;
};
#endif
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