libhl/include/terminal_hl.h

#include "hl.h"

// Terminal manipulation
#define TERMINAL_RESET              "\033[0m"

#define TERMINAL_COLOR_FG_BLACK     "\033[30m"
#define TERMINAL_COLOR_FG_RED       "\033[31m"
#define TERMINAL_COLOR_FG_GREEN     "\033[32m"
#define TERMINAL_COLOR_FG_YELLOW    "\033[33m"
#define TERMINAL_COLOR_FG_BLUE      "\033[34m"
#define TERMINAL_COLOR_FG_MAGENTA   "\033[35m"
#define TERMINAL_COLOR_FG_CYAN      "\033[36m"
#define TERMINAL_COLOR_FG_WHITE     "\033[37m"

#define TERMINAL_COLOR_BG_BLACK     "\033[40m"
#define TERMINAL_COLOR_BG_RED       "\033[41m"
#define TERMINAL_COLOR_BG_GREEN     "\033[42m"
#define TERMINAL_COLOR_BG_YELLOW    "\033[43m"
#define TERMINAL_COLOR_BG_BLUE      "\033[44m"
#define TERMINAL_COLOR_BG_MAGENTA   "\033[45m"
#define TERMINAL_COLOR_BG_CYAN      "\033[46m"
#define TERMINAL_COLOR_BG_WHITE     "\033[47m"

#define TERMINAL_STYLE_BOLD         "\033[1m"
#define TERMINAL_STYLE_ITALICS      "\033[3m"
#define TERMINAL_STYLE_REVERSE      "\033[7m"

typedef struct {
	const char * attribute;
	const char * foreground_color;
	const char * background_color;
} terminal_hl_t;

extern display_t * cterm;

extern void cterm_render_callback(const char * const string,
                                  const int          length,
                                  void       * const attributes);

extern int terminal_hl_init(void);

display_t * cterm = &(display_t) {
	.key = "cterm",
	.callback = cterm_render_callback
};

void cterm_render_callback(const char * const string,
                           const int          length,
                           void       * const attributes) {
	if (!length) {
		fputs(TERMINAL_STYLE_BOLD, stdout);
		putchar(*string);
		fputs(TERMINAL_RESET, stdout);
		return;
	}

	terminal_hl_t * term_hl = (terminal_hl_t*)attributes;
	if (term_hl->attribute) {
		fputs(term_hl->attribute, stdout);
	}
	if (term_hl->foreground_color) {
		fputs(term_hl->foreground_color, stdout);
	}
	for (int i = 0; i < length; i++) {
		putchar(*(string+i));
	}
	fputs(TERMINAL_RESET, stdout);
}


void fun(const char       *   attribute,
         const char       *       color,
               hl_group_t * *         group){
	terminal_hl_t * t = (terminal_hl_t *) malloc(sizeof(terminal_hl_t));
	t->attribute = attribute;
	t->foreground_color = color;
	t->background_color = NULL;
	(*group) = (hl_group_t *)malloc(sizeof(hl_group_t));
	(*group)->link = NULL;
	(*group)->attributes = (void*)t;
}

int terminal_hl_init(void) {
	hl_init();
	new_display_mode(cterm);
	//
	fun(TERMINAL_STYLE_BOLD, TERMINAL_COLOR_FG_CYAN, &special_hl);
	fun(TERMINAL_STYLE_BOLD, TERMINAL_COLOR_FG_YELLOW, &control_hl);
	fun(NULL, TERMINAL_COLOR_FG_YELLOW, &operator_hl);
	fun(TERMINAL_STYLE_BOLD, TERMINAL_COLOR_FG_GREEN, &keyword_hl);
	fun(TERMINAL_STYLE_BOLD, TERMINAL_COLOR_FG_BLUE, &comment_hl);
	fun(TERMINAL_STYLE_BOLD, TERMINAL_COLOR_FG_RED, &string_literal_hl);

	return 0;
}