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#pragma once
#include <u.h>
#include <libn.h>
#include <termios.h>
#include <unibilium.h>
#define iota(x) 1 << (x)
typedef struct RGB8 RGB8;
typedef struct Pen Pen;
typedef struct Dot Dot;
typedef struct Cell Cell;
typedef struct Row Row;
typedef struct Buffer Buffer;
typedef struct Window Window;
typedef struct Node Node;
typedef struct Key Key;
typedef struct Input Input;
typedef struct Term Term;
struct RGB8
{
uint8 r, g, b;
};
enum
{
PenNormal = 0,
PenBold = iota(0),
PenDim = iota(1),
PenInvis = iota(2),
PenItalic = iota(3),
PenReverse = iota(4),
PenStrike = iota(5),
PenUnderline = iota(6),
PenBlink = iota(7),
/* ... */
PenRGB = iota(15),
};
struct Pen
{
ushort state;
union {
/* 256 color (legacy) */
struct {
sshort fg : 8, bg : 8; /* 0 - 255 or COLOUR_DEFAULT */
} col;
/* true color (modern) */
struct {
RGB8 fg, bg;
} rgb;
};
};
/* outputs */
struct Cell
{
rune txt;
Pen pen;
};
struct Row
{
Cell *cells;
uint dirty : 1;
};
struct Dot
{
int row, col;
};
/*
* scroll.top & scroll.bot are pointers into the viewport.
*
* scroll back buffer
*
* scroll.buf->+----------------+-----+
* | | | ^ \
* | before | | | |
* current terminal content | viewport | | | |
* | | | |
* +----------------+-----+\ | | | s > scroll.above
* ^ | | i | \ | | i | c |
* | | | n | \ | | n | r |
* | | v | \ | | v | o |
* | | i | \ | | i | l /
* | buffer | s | >|<- scroll.index | s | l \
* h | | i | / | | i | |
* | | b | / | after | b | s > scroll.below
* | | l | / | viewport | l | i |
* v | | e | / | | e | z /
* +----------------+-----+/ | unused | | e
* <- maxw -> | scroll back | |
* <- w -> | buffer | | |
* | | | |
* | | | v
* scroll.buf + scroll.size->+----------------+-----+
* <- maxw ->
* <- w ->
*/
struct Buffer
{
int w, h; /* dimension of buffer */
Pen pen; /* default attributes */
int maxw; /* allocated cells (maximal cols over time) */
Row *row; /* array of row pointers of size 'h' */
struct {
Row *buf;
Row *top;
Row *bot;
int size;
int index;
int above;
int below;
} scroll;
Dot cur, save; /* cursor position within buffer */
};
struct Window
{
struct Buffer;
int top, left;
uchar curvis : 1;
uchar blink : 2;
Window *parent, *child, *link;
};
/* input */
struct Key
{
int type;
int mods;
uchar utf8[UTFmax+1];
union {
rune pt;
int num;
int sym;
char mouse[4];
} code;
};
struct KeyInfo
{
int type;
int sym;
int modmask;
int modset;
};
struct Input
{
int fd;
int flags;
int wait; /* in ms */
/* modifiers */
uchar closed : 1;
uchar started : 1;
uchar hasold : 1;
struct termios oldterm;
/* buffer */
struct {
long off;
uchar *b, *c, *e, bytes[256];
} rbuf;
struct {
uchar *s, bytes[256];
} ebuf;
/* key data */
Node *keys;
struct KeyInfo c0[32];
};
struct Term
{
/* meta data */
char *name;
unibi_term *info;
struct {
uchar altscreen : 1;
uchar cursorvis : 1;
uchar mouse : 1;
} mode;
struct {
uchar bce : 1;
int colors;
} cap;
/* input capture */
Input input;
/* output display */
Window *root;
Pen pen;
/* raw text to pty */
int fd;
struct {
char *c, b[512];
} buf;
struct {
int len;
char *b;
} tmp;
/* info */
struct {
/* Positioning */
char *cup; // cursor_address
char *vpa; // row_address == vertical position absolute
char *hpa; // column_address = horizontal position absolute
/* Moving */
char *cuu; char *cuu1; // Cursor Up
char *cud; char *cud1; // Cursor Down
char *cuf; char *cuf1; // Cursor Forward == Right
char *cub; char *cub1; // Cursor Backward == Left
/* Editing */
char *ich; char *ich1; // Insert Character
char *dch; char *dch1; // Delete Character
char *il; char *il1; // Insert Line
char *dl; char *dl1; // Delete Line
char *ech; // Erase Character
char *ed2; // Erase Data 2 == Clear screen
char *stbm; // Set Top/Bottom Margins
/* formatting */
char *sgr; // Select Graphic Rendition
char *sgr0; // Exit Attribute Mode
char *sgr_i0, *sgr_i1; // SGR italic off/on
char *sgr_fg; // SGR foreground colour
char *sgr_bg; // SGR background colour
/* Mode setting/clearing */
char *sm_csr; char *rm_csr; // Set/reset mode: Cursor visible
/* augmentations to terminfo */
struct {
char *rgbf; // rgb foreground
char *rgbb; // rgb background
char *smxx; // strikethrough
char *smulx; // curly underline
} ext;
} esc;
Term *link;
};
/* functions */
void tresize(Term *t);
Window *wmake(Window *root, int top, int left, int w, int h, int scroll);
void wresize(Window *root, int w, int h);
void wputrune(Window *win, rune r);
void wscroll(Window *win, int s);
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