//---
//	env: Environments
//---

#ifndef TEX_ENV
#define TEX_ENV

#include <stddef.h>

struct TeX_Node;

/* Simple type definition trick to use struct TeX_Env inside prototypes within
   the struct definition itself */
typedef struct TeX_Env TeX_Env;

struct TeX_Env
{
	/* Environment name */
	char const * name;

	/* free(): Free an environment instance */
	void (*free)(TeX_Env *env);

	/* add_node(): Add a node to an environment */
	void (*add_node)(TeX_Env *env, struct TeX_Node *node);

	/* add_separator(): Add a separator ("&") */
	void (*add_separator)(TeX_Env *env);

	/* add_break(): Add a break ("\\") */
	void (*add_break)(TeX_Env *env);

	/* size(): Compute environment size */
	void (*size)(TeX_Env *env);

	/* render(): Render environment */
	void (*render)(TeX_Env *env, int x, int y, int color);

	/* Dimensions */
	uint16_t width;
	uint16_t height;
	uint16_t line;

	/* More data, each TeX_Env_* subtype will decide */
};

//---
//	Environment construction functions
//---

/* TeX_env_primary(): make a primary, single-flow environment
   This is the environment type of whole formulas. It consists of a single
   flow and ignores separators and breaks.
   Creates and returns a new environment [env] which must be freed by a call
   to [env->free(env)]. */
struct TeX_Env *TeX_env_primary(void);

#endif /* TEX_ENV */