1 files changed, 316 insertions, 0 deletions
diff --git a/src/cmd/term/term.h b/src/cmd/term/term.h
new file mode 100644
index 0000000..6784974
--- /dev/null
+++ b/src/cmd/term/term.h
@@ -0,0 +1,316 @@
+/* See LICENSE for license details. */
+#pragma once
+
+#include <u.h>
+#include <base.h>
+#include <libutf.h>
+
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <harfbuzz/hb.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 & (~Gwrap) & (~Gliga)) != ((b).mode & (~Gwrap) & (~Gliga)) || \
+                            (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)
+
+/* arbitrary sizes */
+#define ESC_BUF_SIZ   (128*UTFmax)
+#define ESC_ARG_SIZ   16
+#define STR_BUF_SIZ   ESC_BUF_SIZ
+#define STR_ARG_SIZ   ESC_ARG_SIZ
+
+// -----------------------------------------------------------------------
+// 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),
+	Gliga      = iota(11),
+	Gboldfaint = Gbold | Gfaint,
+};
+
+enum {
+	SelIdle  = 0,
+	SelEmpty = 1,
+	SelReady = 2
+};
+
+enum {
+	SelRegular     = 1,
+	SelRectangular = 2
+};
+
+enum {
+	SnapWord = 1,
+	SnapLine = 2
+};
+
+/* cursor state */
+enum {
+	CursorSave,
+	CursorLoad
+};
+
+/* cursor mode */
+enum {
+	CursorDefault  = 0,
+	CursorWrap     = 1,
+	CursorOrigin   = 2
+};
+
+/* character set */
+enum {
+	CSgfx0,
+	CSgfx1,
+	CSuk,
+	CSusa,
+	CSmulti,
+	CSger,
+	CSfin,
+};
+
+/* escape sequences */
+enum {
+	Xstart   = 1,
+	Xcsi     = 2,
+	Xstr     = 4,  /* OSC, PM, APC */
+	Xaltcs   = 8,
+	Xstrend  = 16, /* a final string was encountered */
+	Xtest    = 32, /* Enter in test mode */
+	Xutf8    = 64,
+	Xdcs     =128,
+};
+
+/* terminal mode */
+enum {
+	Twrap      = iota(0),
+	Tinsert    = iota(1),
+	Taltscreen = iota(2),
+	Tcrlf      = iota(3),
+	Techo      = iota(4),
+	Tprint     = iota(5),
+	Tutf8      = iota(6),
+	Tsixel     = iota(7),
+};
+
+/* window mode */
+enum {
+	Wvisible     = iota(0),
+	Wfocused     = iota(1),
+	Wappkeypad   = iota(2),
+	Wmousebtn    = iota(3),
+	Wmousemotion = iota(4),
+	Wreverse     = iota(5),
+	Wkbdblock    = iota(6),
+	Whide        = iota(7),
+	Wappcursor   = iota(8),
+	Wmousesgr    = iota(9),
+	W8bit        = iota(10),
+	Wblink       = iota(11),
+	Wbflink      = iota(12),
+	Wfocus       = iota(13),
+	Wmousex10    = iota(14),
+	Wmousemany   = iota(15),
+	Wbrcktpaste  = iota(16),
+	Wnumlock     = iota(17),
+	Wmouse       = Wmousebtn|Wmousemotion|Wmousex10|Wmousemany,
+};
+
+
+// -----------------------------------------------------------------------
+// types
+
+/* term.c */
+typedef struct Letter    Letter;
+typedef struct Dot       Dot;
+typedef struct Selection Selection;
+typedef struct Terminal  Terminal;
+
+typedef union Arg Arg;
+
+struct Letter {
+	rune u;           /* character code */
+	ushort mode;      /* attribute flags */
+	uint32 fg;        /* foreground  */
+	uint32 bg;        /* background  */
+};
+
+struct Dot {
+	Letter attr; /* current char attributes */
+	int x;
+	int y;
+	char state;
+};
+
+struct Selection {
+	int mode;
+	int type;
+	int snap;
+	/*
+	 * Selection variables:
+	 * nb – normalized coordinates of the beginning of the selection
+	 * ne – normalized coordinates of the end of the selection
+	 * ob – original coordinates of the beginning of the selection
+	 * oe – original coordinates of the end of the selection
+	 */
+	struct {
+		int x, y;
+	} nb, ne, ob, oe;
+
+	int alt;
+};
+
+/* Internal representation of the screen */
+struct Terminal {
+	int  row;       /* nb row */
+	int  col;       /* nb col */
+	Letter **line;  /* screen */
+	Letter **alt;   /* alternate screen */
+	int  *dirty;    /* dirtyness of lines */
+	Dot  c;         /* cursor */
+	int  ocx;       /* old cursor col */
+	int  ocy;       /* old cursor row */
+	int  top;       /* top    scroll limit */
+	int  bot;       /* bottom scroll limit */
+	int  mode;      /* terminal mode flags */
+	int  esc;       /* escape state flags */
+	char trantbl[4];/* charset table translation */
+	int  charset;   /* current charset */
+	int  icharset;  /* selected charset for sequence */
+	int  *tabs;
+	rune lastc;     /* last printed char outside of sequence, 0 if control */
+};
+
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
+typedef struct {
+	char  buf[ESC_BUF_SIZ]; /* raw string */
+	ulong len;              /* raw string length */
+	char  priv;
+	int   arg[ESC_ARG_SIZ];
+	int   narg;              /* nb of args */
+	char  mode[2];
+} CSIEscape;
+
+/* STR Escape sequence structs */
+/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
+typedef struct {
+	char type;             /* ESC type ... */
+	char *buf;             /* allocated raw string */
+	size_t siz;            /* allocation size */
+	size_t len;            /* raw string length */
+	char *args[STR_ARG_SIZ];
+	int narg;              /* nb of args */
+} STREscape;
+
+/* x.c */
+typedef struct TermWindow TermWindow;
+
+struct TermWindow {
+	int tw, th;     /* tty width and height */
+	int w, h;       /* window width and height */
+    int hb, vb;     /* horizontal and vertical border (in pix) */
+	int ch;         /* char height */
+	int cw;         /* char width  */
+	int mode;       /* window state/mode flags */
+	int cursor;     /* cursor style */
+};
+
+/* used for user hooks */
+union Arg {
+	int   i;
+	uint  ui;
+	float f;
+	void *v;
+	char *s;
+};
+
+// -----------------------------------------------------------------------
+// x.c (backend functions)
+
+void xbell(void);
+void xclipcopy(void);
+void xdrawcursor(int, int, Letter, int, int, Letter, Letter*, int);
+void xdrawline(Letter*, 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 fatal( 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 **);
+ulong 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 *worddelimiters;
+extern int   allowaltscreen;
+extern int   allowwindowops;
+extern char  *termname;
+extern uint  tabspaces;
+extern uint  defaultfg;
+extern uint  defaultbg;
+extern float alpha;