diff options
Diffstat (limited to 'src/libterm/term.h')
| -rw-r--r-- | src/libterm/term.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/src/libterm/term.h b/src/libterm/term.h new file mode 100644 index 0000000..6bd2f6b --- /dev/null +++ b/src/libterm/term.h @@ -0,0 +1,270 @@ +#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); |