/* See LICENSE for license details. */
#pragma once

#include <u.h>
#include <libn.h>

#include <errno.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>

// -----------------------------------------------------------------------
// macros

#define BETWEEN(x, a, b)	((a) <= (x) && (x) <= (b))
#define DIVCEIL(n, d)		(((n) + ((d) - 1)) / (d))
#define DEFAULT(a, b)		(a) = (a) ? (a) : (b)
#define LIMIT(x, a, b)		(x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
#define GLYPHCMP(a, b)		((a).mode != (b).mode || (a).fg != (b).fg || \
				(a).bg != (b).bg)
#define TIMEDIFF(t1, t2)	((t1.tv_sec-t2.tv_sec)*1000 + \
				(t1.tv_nsec-t2.tv_nsec)/1E6)
#define MODBIT(x, set, bit)	((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))

#define TRUECOLOR(r,g,b)	(1 << 24 | (r) << 16 | (g) << 8 | (b))
#define IS_TRUECOL(x)		(1 << 24 & (x))

#define iota(x) 1 << (x)

// -----------------------------------------------------------------------
// constants 

enum {
	Gnil,
	Gbold      = iota(0),
	Gfaint     = iota(1),
	Gitalic    = iota(2),
	Gunline    = iota(3),
	Gblink     = iota(4),
	Greverse   = iota(5),
	Ginvisible = iota(6),
	Gstruck    = iota(7),
	Gwrap      = iota(8),
	Gwide      = iota(9),
	Gwdummy    = iota(10),
	Gboldfaint = Gbold | Gfaint,
};

enum {
	SelIdle  = 0,
	SelEmpty = 1,
	SelReady = 2
};

enum {
	SelRegular     = 1,
	SelRectangular = 2
};

enum {
	SnapWord = 1,
	SnapLine = 2
};

enum win_mode {
	Wvisible     = 1 << 0,
	Wfocused     = 1 << 1,
	Wappkeypad   = 1 << 2,
	Wmousebtn    = 1 << 3,
	Wmousemotion = 1 << 4,
	Wreverse     = 1 << 5,
	Wkbdblock    = 1 << 6,
	Whide        = 1 << 7,
	Wappcursor   = 1 << 8,
	Wmousesgr    = 1 << 9,
	W8bit        = 1 << 10,
	Wblink       = 1 << 11,
	Wbflink      = 1 << 12,
	Wfocus       = 1 << 13,
	Wmousex10    = 1 << 14,
	Wmousemany   = 1 << 15,
	Wbrcktpaste  = 1 << 16,
	Wnumlock     = 1 << 17,
	Wmouse       = Wmousebtn|Wmousemotion|Wmousex10|Wmousemany,
};


// -----------------------------------------------------------------------
// types
typedef struct Letter Letter;

struct Letter {
	rune u;           /* character code */
	ushort mode;      /* attribute flags */
	uint32_t fg;      /* foreground  */
	uint32_t bg;      /* background  */
};

typedef Letter *Line;

typedef union {
	int i;
	uint ui;
	float f;
	 void *v;
	 char *s;
} Arg;

void xbell(void);
void xclipcopy(void);
void xdrawcursor(int, int, Letter, int, int, Letter);
void xdrawline(Line, int, int, int);
void xfinishdraw(void);
void xloadcols(void);
int  xsetcolorname(int, char *);
void xsettitle(char *);
int  xsetcursor(int);
void xsetmode(int, uint);
void xsetpointermotion(int);
void xsetsel(char *);
int  xstartdraw(void);
void xximspot(int, int);

void die( char *, ...);
void redraw(void);
void draw(void);

void printscreen(Arg *);
void printsel(Arg *);
void sendbreak(Arg *);
void toggleprinter(Arg *);

int tattrset(int);
void tnew(int, int);
void tresize(int, int);
void tsetdirtattr(int);
void ttyhangup(void);
int ttynew(char *, char *, char *, char **);
size_t ttyread(void);
void ttyresize(int, int);
void ttywrite( char *, size_t, int);

void resettitle(void);

void selclear(void);
void selinit(void);
void selstart(int, int, int);
void selextend(int, int, int, int);
int selected(int, int);
char *getsel(void);

void *xmalloc(size_t);
void *xrealloc(void *, size_t);
char *xstrdup(char *);

/* config.h globals */
extern char         *utmp;
extern char         *scroll;
extern char         *stty_args;
extern char         *vtiden;
extern wchar_t      *worddelimiters;
extern int          allowaltscreen;
extern int          allowwindowops;
extern char         *termname;
extern unsigned int tabspaces;
extern unsigned int defaultfg;
extern unsigned int defaultbg;