59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
//---
|
|
// 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 */
|