3080 lines
66 KiB
C
3080 lines
66 KiB
C
/* See LICENSE for license details. */
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <termios.h>
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#include <unistd.h>
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#include <wchar.h>
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#include "st.h"
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#include "win.h"
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#if defined(__linux)
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#include <pty.h>
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#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
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#include <util.h>
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#elif defined(__FreeBSD__) || defined(__DragonFly__)
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#include <libutil.h>
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#endif
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/* Arbitrary sizes */
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#define UTF_INVALID 0xFFFD
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#define UTF_SIZ 4
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#define ESC_BUF_SIZ (128*UTF_SIZ)
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#define ESC_ARG_SIZ 16
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#define STR_BUF_SIZ ESC_BUF_SIZ
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#define STR_ARG_SIZ ESC_ARG_SIZ
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#define HISTSIZE 2000
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#define RESIZEBUFFER 1000
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/* macros */
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#define IS_SET(flag) ((term.mode & (flag)) != 0)
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#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == 0x7f)
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#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
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#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
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#define ISDELIM(u) (u && wcschr(worddelimiters, u))
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#define TLINE(y) ( \
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(y) < term.scr ? term.hist[(term.histi + (y) - term.scr + 1 + HISTSIZE) % HISTSIZE] \
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: term.line[(y) - term.scr] \
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)
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#define TLINEABS(y) ( \
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(y) < 0 ? term.hist[(term.histi + (y) + 1 + HISTSIZE) % HISTSIZE] : term.line[(y)] \
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)
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#define UPDATEWRAPNEXT(alt, col) do { \
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if ((term.c.state & CURSOR_WRAPNEXT) && term.c.x + term.wrapcwidth[alt] < col) { \
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term.c.x += term.wrapcwidth[alt]; \
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term.c.state &= ~CURSOR_WRAPNEXT; \
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} \
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} while (0);
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enum term_mode {
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MODE_WRAP = 1 << 0,
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MODE_INSERT = 1 << 1,
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MODE_ALTSCREEN = 1 << 2,
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MODE_CRLF = 1 << 3,
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MODE_ECHO = 1 << 4,
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MODE_PRINT = 1 << 5,
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MODE_UTF8 = 1 << 6,
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};
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enum scroll_mode {
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SCROLL_RESIZE = -1,
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SCROLL_NOSAVEHIST = 0,
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SCROLL_SAVEHIST = 1
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};
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enum cursor_movement {
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CURSOR_SAVE,
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CURSOR_LOAD
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};
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enum cursor_state {
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CURSOR_DEFAULT = 0,
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CURSOR_WRAPNEXT = 1,
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CURSOR_ORIGIN = 2
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};
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enum charset {
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CS_GRAPHIC0,
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CS_GRAPHIC1,
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CS_UK,
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CS_USA,
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CS_MULTI,
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CS_GER,
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CS_FIN
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};
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enum escape_state {
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ESC_START = 1,
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ESC_CSI = 2,
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ESC_STR = 4, /* DCS, OSC, PM, APC */
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ESC_ALTCHARSET = 8,
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ESC_STR_END = 16, /* a final string was encountered */
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ESC_TEST = 32, /* Enter in test mode */
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ESC_UTF8 = 64,
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};
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typedef struct {
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Glyph attr; /* current char attributes */
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int x;
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int y;
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char state;
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} TCursor;
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typedef struct {
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int mode;
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int type;
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int snap;
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/*
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* Selection variables:
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* nb – normalized coordinates of the beginning of the selection
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* ne – normalized coordinates of the end of the selection
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* ob – original coordinates of the beginning of the selection
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* oe – original coordinates of the end of the selection
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*/
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struct {
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int x, y;
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} nb, ne, ob, oe;
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int alt;
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} Selection;
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/* Internal representation of the screen */
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typedef struct {
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int row; /* nb row */
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int col; /* nb col */
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Line *line; /* screen */
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Line hist[HISTSIZE]; /* history buffer */
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int histi; /* history index */
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int histf; /* nb history available */
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int scr; /* scroll back */
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int wrapcwidth[2]; /* used in updating WRAPNEXT when resizing */
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int *dirty; /* dirtyness of lines */
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TCursor c; /* cursor */
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int ocx; /* old cursor col */
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int ocy; /* old cursor row */
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int top; /* top scroll limit */
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int bot; /* bottom scroll limit */
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int mode; /* terminal mode flags */
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int esc; /* escape state flags */
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char trantbl[4]; /* charset table translation */
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int charset; /* current charset */
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int icharset; /* selected charset for sequence */
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int *tabs;
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Rune lastc; /* last printed char outside of sequence, 0 if control */
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} Term;
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/* CSI Escape sequence structs */
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/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
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typedef struct {
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char buf[ESC_BUF_SIZ]; /* raw string */
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size_t len; /* raw string length */
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char priv;
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int arg[ESC_ARG_SIZ];
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int narg; /* nb of args */
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char mode[2];
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} CSIEscape;
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/* STR Escape sequence structs */
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/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
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typedef struct {
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char type; /* ESC type ... */
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char *buf; /* allocated raw string */
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size_t siz; /* allocation size */
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size_t len; /* raw string length */
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char *args[STR_ARG_SIZ];
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int narg; /* nb of args */
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} STREscape;
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static void execsh(char *, char **);
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static void stty(char **);
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static void sigchld(int);
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static void ttywriteraw(const char *, size_t);
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static void csidump(void);
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static void csihandle(void);
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static void csiparse(void);
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static void csireset(void);
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static void osc_color_response(int, int, int);
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static int eschandle(uchar);
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static void strdump(void);
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static void strhandle(void);
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static void strparse(void);
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static void strreset(void);
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static void tprinter(char *, size_t);
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static void tdumpsel(void);
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static void tdumpline(int);
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static void tdump(void);
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static void tclearregion(int, int, int, int, int);
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static void tcursor(int);
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static void tclearglyph(Glyph *, int);
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static void tresetcursor(void);
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static void tdeletechar(int);
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static void tdeleteline(int);
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static void tinsertblank(int);
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static void tinsertblankline(int);
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static int tlinelen(Line len);
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static int tiswrapped(Line line);
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static char *tgetglyphs(char *, const Glyph *, const Glyph *);
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static size_t tgetline(char *, const Glyph *);
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static void tmoveto(int, int);
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static void tmoveato(int, int);
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static void tnewline(int);
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static void tputtab(int);
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static void tputc(Rune);
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static void treset(void);
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static void tscrollup(int, int, int, int);
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static void tscrolldown(int, int);
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static void treflow(int, int);
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static void rscrolldown(int);
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static void tresizedef(int, int);
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static void tresizealt(int, int);
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static void tsetattr(const int *, int);
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static void tsetchar(Rune, const Glyph *, int, int);
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static void tsetdirt(int, int);
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static void tsetscroll(int, int);
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static void tswapscreen(void);
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static void tloaddefscreen(int, int);
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static void tloadaltscreen(int, int);
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static void tsetmode(int, int, const int *, int);
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static int twrite(const char *, int, int);
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static void tfulldirt(void);
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static void tcontrolcode(uchar );
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static void tdectest(char );
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static void tdefutf8(char);
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static int32_t tdefcolor(const int *, int *, int);
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static void tdeftran(char);
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static void tstrsequence(uchar);
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static void drawregion(int, int, int, int);
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static void selnormalize(void);
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static void selscroll(int, int, int);
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static void selmove(int);
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static void selremove(void);
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static int regionselected(int, int, int, int);
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static void selsnap(int *, int *, int);
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static size_t utf8decode(const char *, Rune *, size_t);
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static Rune utf8decodebyte(char, size_t *);
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static char utf8encodebyte(Rune, size_t);
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static size_t utf8validate(Rune *, size_t);
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static char *base64dec(const char *);
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static char base64dec_getc(const char **);
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static ssize_t xwrite(int, const char *, size_t);
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/* Globals */
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static Term term;
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static Selection sel;
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static CSIEscape csiescseq;
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static STREscape strescseq;
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static int iofd = 1;
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static int cmdfd;
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static pid_t pid;
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static const uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
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static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
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static const Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
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static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
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ssize_t
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xwrite(int fd, const char *s, size_t len)
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{
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size_t aux = len;
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ssize_t r;
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while (len > 0) {
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r = write(fd, s, len);
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if (r < 0)
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return r;
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len -= r;
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s += r;
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}
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return aux;
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}
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void *
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xmalloc(size_t len)
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{
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void *p;
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if (!(p = malloc(len)))
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die("malloc: %s\n", strerror(errno));
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return p;
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}
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void *
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xrealloc(void *p, size_t len)
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{
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if ((p = realloc(p, len)) == NULL)
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die("realloc: %s\n", strerror(errno));
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return p;
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}
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char *
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xstrdup(const char *s)
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{
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char *p;
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if ((p = strdup(s)) == NULL)
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die("strdup: %s\n", strerror(errno));
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return p;
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}
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size_t
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utf8decode(const char *c, Rune *u, size_t clen)
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{
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size_t i, j, len, type;
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Rune udecoded;
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*u = UTF_INVALID;
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if (!clen)
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return 0;
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udecoded = utf8decodebyte(c[0], &len);
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if (!BETWEEN(len, 1, UTF_SIZ))
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return 1;
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for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
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udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
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if (type != 0)
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return j;
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}
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if (j < len)
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return 0;
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*u = udecoded;
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utf8validate(u, len);
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return len;
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}
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Rune
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utf8decodebyte(char c, size_t *i)
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{
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for (*i = 0; *i < LEN(utfmask); ++(*i))
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if (((uchar)c & utfmask[*i]) == utfbyte[*i])
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return (uchar)c & ~utfmask[*i];
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return 0;
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}
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size_t
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utf8encode(Rune u, char *c)
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{
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size_t len, i;
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len = utf8validate(&u, 0);
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if (len > UTF_SIZ)
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return 0;
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for (i = len - 1; i != 0; --i) {
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c[i] = utf8encodebyte(u, 0);
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u >>= 6;
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}
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c[0] = utf8encodebyte(u, len);
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return len;
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}
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char
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utf8encodebyte(Rune u, size_t i)
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{
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return utfbyte[i] | (u & ~utfmask[i]);
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}
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size_t
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utf8validate(Rune *u, size_t i)
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{
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if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
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*u = UTF_INVALID;
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for (i = 1; *u > utfmax[i]; ++i)
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;
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return i;
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}
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char
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base64dec_getc(const char **src)
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{
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while (**src && !isprint((unsigned char)**src))
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(*src)++;
|
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return **src ? *((*src)++) : '='; /* emulate padding if string ends */
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}
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char *
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base64dec(const char *src)
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{
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size_t in_len = strlen(src);
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char *result, *dst;
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static const char base64_digits[256] = {
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[43] = 62, 0, 0, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
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0, 0, 0, -1, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0,
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0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
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};
|
||
|
||
if (in_len % 4)
|
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in_len += 4 - (in_len % 4);
|
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result = dst = xmalloc(in_len / 4 * 3 + 1);
|
||
while (*src) {
|
||
int a = base64_digits[(unsigned char) base64dec_getc(&src)];
|
||
int b = base64_digits[(unsigned char) base64dec_getc(&src)];
|
||
int c = base64_digits[(unsigned char) base64dec_getc(&src)];
|
||
int d = base64_digits[(unsigned char) base64dec_getc(&src)];
|
||
|
||
/* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */
|
||
if (a == -1 || b == -1)
|
||
break;
|
||
|
||
*dst++ = (a << 2) | ((b & 0x30) >> 4);
|
||
if (c == -1)
|
||
break;
|
||
*dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2);
|
||
if (d == -1)
|
||
break;
|
||
*dst++ = ((c & 0x03) << 6) | d;
|
||
}
|
||
*dst = '\0';
|
||
return result;
|
||
}
|
||
|
||
void
|
||
selinit(void)
|
||
{
|
||
sel.mode = SEL_IDLE;
|
||
sel.snap = 0;
|
||
sel.ob.x = -1;
|
||
}
|
||
|
||
int
|
||
tlinelen(Line line)
|
||
{
|
||
int i = term.col - 1;
|
||
|
||
for (; i >= 0 && !(line[i].mode & (ATTR_SET | ATTR_WRAP)); i--);
|
||
return i + 1;
|
||
}
|
||
|
||
int
|
||
tiswrapped(Line line)
|
||
{
|
||
int len = tlinelen(line);
|
||
|
||
return len > 0 && (line[len - 1].mode & ATTR_WRAP);
|
||
}
|
||
|
||
char *
|
||
tgetglyphs(char *buf, const Glyph *gp, const Glyph *lgp)
|
||
{
|
||
while (gp <= lgp)
|
||
if (gp->mode & ATTR_WDUMMY) {
|
||
gp++;
|
||
} else {
|
||
buf += utf8encode((gp++)->u, buf);
|
||
}
|
||
return buf;
|
||
}
|
||
|
||
size_t
|
||
tgetline(char *buf, const Glyph *fgp)
|
||
{
|
||
char *ptr;
|
||
const Glyph *lgp = &fgp[term.col - 1];
|
||
|
||
while (lgp > fgp && !(lgp->mode & (ATTR_SET | ATTR_WRAP)))
|
||
lgp--;
|
||
ptr = tgetglyphs(buf, fgp, lgp);
|
||
if (!(lgp->mode & ATTR_WRAP))
|
||
*(ptr++) = '\n';
|
||
return ptr - buf;
|
||
}
|
||
|
||
void
|
||
selstart(int col, int row, int snap)
|
||
{
|
||
selclear();
|
||
sel.mode = SEL_EMPTY;
|
||
sel.type = SEL_REGULAR;
|
||
sel.alt = IS_SET(MODE_ALTSCREEN);
|
||
sel.snap = snap;
|
||
sel.oe.x = sel.ob.x = col;
|
||
sel.oe.y = sel.ob.y = row;
|
||
selnormalize();
|
||
|
||
if (sel.snap != 0)
|
||
sel.mode = SEL_READY;
|
||
tsetdirt(sel.nb.y, sel.ne.y);
|
||
}
|
||
|
||
void
|
||
selextend(int col, int row, int type, int done)
|
||
{
|
||
int oldey, oldex, oldsby, oldsey, oldtype;
|
||
|
||
if (sel.mode == SEL_IDLE)
|
||
return;
|
||
if (done && sel.mode == SEL_EMPTY) {
|
||
selclear();
|
||
return;
|
||
}
|
||
|
||
oldey = sel.oe.y;
|
||
oldex = sel.oe.x;
|
||
oldsby = sel.nb.y;
|
||
oldsey = sel.ne.y;
|
||
oldtype = sel.type;
|
||
|
||
sel.oe.x = col;
|
||
sel.oe.y = row;
|
||
sel.type = type;
|
||
selnormalize();
|
||
|
||
if (oldey != sel.oe.y || oldex != sel.oe.x ||
|
||
oldtype != sel.type || sel.mode == SEL_EMPTY)
|
||
tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
|
||
|
||
sel.mode = done ? SEL_IDLE : SEL_READY;
|
||
}
|
||
|
||
void
|
||
selnormalize(void)
|
||
{
|
||
int i;
|
||
|
||
if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
|
||
sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
|
||
sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
|
||
} else {
|
||
sel.nb.x = MIN(sel.ob.x, sel.oe.x);
|
||
sel.ne.x = MAX(sel.ob.x, sel.oe.x);
|
||
}
|
||
sel.nb.y = MIN(sel.ob.y, sel.oe.y);
|
||
sel.ne.y = MAX(sel.ob.y, sel.oe.y);
|
||
|
||
selsnap(&sel.nb.x, &sel.nb.y, -1);
|
||
selsnap(&sel.ne.x, &sel.ne.y, +1);
|
||
|
||
/* expand selection over line breaks */
|
||
if (sel.type == SEL_RECTANGULAR)
|
||
return;
|
||
|
||
i = tlinelen(TLINE(sel.nb.y));
|
||
if (sel.nb.x > i)
|
||
sel.nb.x = i;
|
||
if (sel.ne.x >= tlinelen(TLINE(sel.ne.y)))
|
||
sel.ne.x = term.col - 1;
|
||
}
|
||
|
||
int
|
||
regionselected(int x1, int y1, int x2, int y2)
|
||
{
|
||
if (sel.ob.x == -1 || sel.mode == SEL_EMPTY ||
|
||
sel.alt != IS_SET(MODE_ALTSCREEN) || sel.nb.y > y2 || sel.ne.y < y1)
|
||
return 0;
|
||
|
||
return (sel.type == SEL_RECTANGULAR) ? sel.nb.x <= x2 && sel.ne.x >= x1
|
||
: (sel.nb.y != y2 || sel.nb.x <= x2) &&
|
||
(sel.ne.y != y1 || sel.ne.x >= x1);
|
||
}
|
||
|
||
int
|
||
selected(int x, int y)
|
||
{
|
||
return regionselected(x, y, x, y);
|
||
}
|
||
|
||
void
|
||
selsnap(int *x, int *y, int direction)
|
||
{
|
||
int newx, newy, xt, yt;
|
||
int rtop = 0, rbot = term.row - 1;
|
||
int delim, prevdelim;
|
||
const Glyph *gp, *prevgp;
|
||
|
||
if (!IS_SET(MODE_ALTSCREEN))
|
||
rtop += -term.histf + term.scr, rbot += term.scr;
|
||
|
||
switch (sel.snap) {
|
||
case SNAP_WORD:
|
||
/*
|
||
* Snap around if the word wraps around at the end or
|
||
* beginning of a line.
|
||
*/
|
||
prevgp = &TLINE(*y)[*x];
|
||
prevdelim = ISDELIM(prevgp->u);
|
||
for (;;) {
|
||
newx = *x + direction;
|
||
newy = *y;
|
||
if (!BETWEEN(newx, 0, term.col - 1)) {
|
||
newy += direction;
|
||
newx = (newx + term.col) % term.col;
|
||
if (!BETWEEN(newy, rtop, rbot))
|
||
break;
|
||
|
||
if (direction > 0)
|
||
yt = *y, xt = *x;
|
||
else
|
||
yt = newy, xt = newx;
|
||
if (!(TLINE(yt)[xt].mode & ATTR_WRAP))
|
||
break;
|
||
}
|
||
|
||
if (newx >= tlinelen(TLINE(newy)))
|
||
break;
|
||
|
||
gp = &TLINE(newy)[newx];
|
||
delim = ISDELIM(gp->u);
|
||
if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim ||
|
||
(delim && !(gp->u == ' ' && prevgp->u == ' '))))
|
||
break;
|
||
|
||
*x = newx;
|
||
*y = newy;
|
||
prevgp = gp;
|
||
prevdelim = delim;
|
||
}
|
||
break;
|
||
case SNAP_LINE:
|
||
/*
|
||
* Snap around if the the previous line or the current one
|
||
* has set ATTR_WRAP at its end. Then the whole next or
|
||
* previous line will be selected.
|
||
*/
|
||
*x = (direction < 0) ? 0 : term.col - 1;
|
||
if (direction < 0) {
|
||
for (; *y > rtop; *y -= 1) {
|
||
if (!tiswrapped(TLINE(*y-1)))
|
||
break;
|
||
}
|
||
} else if (direction > 0) {
|
||
for (; *y < rbot; *y += 1) {
|
||
if (!tiswrapped(TLINE(*y)))
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
char *
|
||
getsel(void)
|
||
{
|
||
char *str, *ptr;
|
||
int y, lastx, linelen;
|
||
const Glyph *gp, *lgp;
|
||
|
||
if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN))
|
||
return NULL;
|
||
|
||
str = xmalloc((term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ);
|
||
ptr = str;
|
||
|
||
/* append every set & selected glyph to the selection */
|
||
for (y = sel.nb.y; y <= sel.ne.y; y++) {
|
||
Line line = TLINE(y);
|
||
|
||
if ((linelen = tlinelen(line)) == 0) {
|
||
*ptr++ = '\n';
|
||
continue;
|
||
}
|
||
|
||
if (sel.type == SEL_RECTANGULAR) {
|
||
gp = &line[sel.nb.x];
|
||
lastx = sel.ne.x;
|
||
} else {
|
||
gp = &line[sel.nb.y == y ? sel.nb.x : 0];
|
||
lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
|
||
}
|
||
lgp = &line[MIN(lastx, linelen-1)];
|
||
|
||
ptr = tgetglyphs(ptr, gp, lgp);
|
||
/*
|
||
* Copy and pasting of line endings is inconsistent
|
||
* in the inconsistent terminal and GUI world.
|
||
* The best solution seems like to produce '\n' when
|
||
* something is copied from st and convert '\n' to
|
||
* '\r', when something to be pasted is received by
|
||
* st.
|
||
* FIXME: Fix the computer world.
|
||
*/
|
||
if ((y < sel.ne.y || lastx >= linelen) &&
|
||
(!(lgp->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
|
||
*ptr++ = '\n';
|
||
}
|
||
*ptr = '\0';
|
||
return str;
|
||
}
|
||
|
||
void
|
||
selclear(void)
|
||
{
|
||
if (sel.ob.x == -1)
|
||
return;
|
||
selremove();
|
||
tsetdirt(sel.nb.y, sel.ne.y);
|
||
}
|
||
|
||
void
|
||
selremove(void)
|
||
{
|
||
sel.mode = SEL_IDLE;
|
||
sel.ob.x = -1;
|
||
}
|
||
|
||
void
|
||
die(const char *errstr, ...)
|
||
{
|
||
va_list ap;
|
||
|
||
va_start(ap, errstr);
|
||
vfprintf(stderr, errstr, ap);
|
||
va_end(ap);
|
||
exit(1);
|
||
}
|
||
|
||
void
|
||
execsh(char *cmd, char **args)
|
||
{
|
||
char *sh, *prog, *arg;
|
||
const struct passwd *pw;
|
||
|
||
errno = 0;
|
||
if ((pw = getpwuid(getuid())) == NULL) {
|
||
if (errno)
|
||
die("getpwuid: %s\n", strerror(errno));
|
||
else
|
||
die("who are you?\n");
|
||
}
|
||
|
||
if ((sh = getenv("SHELL")) == NULL)
|
||
sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;
|
||
|
||
if (args) {
|
||
prog = args[0];
|
||
arg = NULL;
|
||
} else if (scroll) {
|
||
prog = scroll;
|
||
arg = utmp ? utmp : sh;
|
||
} else if (utmp) {
|
||
prog = utmp;
|
||
arg = NULL;
|
||
} else {
|
||
prog = sh;
|
||
arg = NULL;
|
||
}
|
||
DEFAULT(args, ((char *[]) {prog, arg, NULL}));
|
||
|
||
unsetenv("COLUMNS");
|
||
unsetenv("LINES");
|
||
unsetenv("TERMCAP");
|
||
setenv("LOGNAME", pw->pw_name, 1);
|
||
setenv("USER", pw->pw_name, 1);
|
||
setenv("SHELL", sh, 1);
|
||
setenv("HOME", pw->pw_dir, 1);
|
||
setenv("TERM", termname, 1);
|
||
|
||
signal(SIGCHLD, SIG_DFL);
|
||
signal(SIGHUP, SIG_DFL);
|
||
signal(SIGINT, SIG_DFL);
|
||
signal(SIGQUIT, SIG_DFL);
|
||
signal(SIGTERM, SIG_DFL);
|
||
signal(SIGALRM, SIG_DFL);
|
||
|
||
execvp(prog, args);
|
||
_exit(1);
|
||
}
|
||
|
||
void
|
||
sigchld(int a)
|
||
{
|
||
int stat;
|
||
pid_t p;
|
||
|
||
if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
|
||
die("waiting for pid %hd failed: %s\n", pid, strerror(errno));
|
||
|
||
if (pid != p)
|
||
return;
|
||
|
||
if (WIFEXITED(stat) && WEXITSTATUS(stat))
|
||
die("child exited with status %d\n", WEXITSTATUS(stat));
|
||
else if (WIFSIGNALED(stat))
|
||
die("child terminated due to signal %d\n", WTERMSIG(stat));
|
||
_exit(0);
|
||
}
|
||
|
||
void
|
||
stty(char **args)
|
||
{
|
||
char cmd[_POSIX_ARG_MAX], **p, *q, *s;
|
||
size_t n, siz;
|
||
|
||
if ((n = strlen(stty_args)) > sizeof(cmd)-1)
|
||
die("incorrect stty parameters\n");
|
||
memcpy(cmd, stty_args, n);
|
||
q = cmd + n;
|
||
siz = sizeof(cmd) - n;
|
||
for (p = args; p && (s = *p); ++p) {
|
||
if ((n = strlen(s)) > siz-1)
|
||
die("stty parameter length too long\n");
|
||
*q++ = ' ';
|
||
memcpy(q, s, n);
|
||
q += n;
|
||
siz -= n + 1;
|
||
}
|
||
*q = '\0';
|
||
if (system(cmd) != 0)
|
||
perror("Couldn't call stty");
|
||
}
|
||
|
||
int
|
||
ttynew(const char *line, char *cmd, const char *out, char **args)
|
||
{
|
||
int m, s;
|
||
|
||
if (out) {
|
||
term.mode |= MODE_PRINT;
|
||
iofd = (!strcmp(out, "-")) ?
|
||
1 : open(out, O_WRONLY | O_CREAT, 0666);
|
||
if (iofd < 0) {
|
||
fprintf(stderr, "Error opening %s:%s\n",
|
||
out, strerror(errno));
|
||
}
|
||
}
|
||
|
||
if (line) {
|
||
if ((cmdfd = open(line, O_RDWR)) < 0)
|
||
die("open line '%s' failed: %s\n",
|
||
line, strerror(errno));
|
||
dup2(cmdfd, 0);
|
||
stty(args);
|
||
return cmdfd;
|
||
}
|
||
|
||
/* seems to work fine on linux, openbsd and freebsd */
|
||
if (openpty(&m, &s, NULL, NULL, NULL) < 0)
|
||
die("openpty failed: %s\n", strerror(errno));
|
||
|
||
switch (pid = fork()) {
|
||
case -1:
|
||
die("fork failed: %s\n", strerror(errno));
|
||
break;
|
||
case 0:
|
||
close(iofd);
|
||
close(m);
|
||
setsid(); /* create a new process group */
|
||
dup2(s, 0);
|
||
dup2(s, 1);
|
||
dup2(s, 2);
|
||
if (ioctl(s, TIOCSCTTY, NULL) < 0)
|
||
die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
|
||
if (s > 2)
|
||
close(s);
|
||
#ifdef __OpenBSD__
|
||
if (pledge("stdio getpw proc exec", NULL) == -1)
|
||
die("pledge\n");
|
||
#endif
|
||
execsh(cmd, args);
|
||
break;
|
||
default:
|
||
#ifdef __OpenBSD__
|
||
if (pledge("stdio rpath tty proc", NULL) == -1)
|
||
die("pledge\n");
|
||
#endif
|
||
close(s);
|
||
cmdfd = m;
|
||
signal(SIGCHLD, sigchld);
|
||
break;
|
||
}
|
||
return cmdfd;
|
||
}
|
||
|
||
size_t
|
||
ttyread(void)
|
||
{
|
||
static char buf[BUFSIZ];
|
||
static int buflen = 0;
|
||
int ret, written;
|
||
|
||
/* append read bytes to unprocessed bytes */
|
||
ret = read(cmdfd, buf+buflen, LEN(buf)-buflen);
|
||
|
||
switch (ret) {
|
||
case 0:
|
||
exit(0);
|
||
case -1:
|
||
die("couldn't read from shell: %s\n", strerror(errno));
|
||
default:
|
||
buflen += ret;
|
||
written = twrite(buf, buflen, 0);
|
||
buflen -= written;
|
||
/* keep any incomplete UTF-8 byte sequence for the next call */
|
||
if (buflen > 0)
|
||
memmove(buf, buf + written, buflen);
|
||
return ret;
|
||
}
|
||
}
|
||
|
||
void
|
||
ttywrite(const char *s, size_t n, int may_echo)
|
||
{
|
||
const char *next;
|
||
|
||
kscrolldown(&((Arg){ .i = term.scr }));
|
||
if (may_echo && IS_SET(MODE_ECHO))
|
||
twrite(s, n, 1);
|
||
|
||
if (!IS_SET(MODE_CRLF)) {
|
||
ttywriteraw(s, n);
|
||
return;
|
||
}
|
||
|
||
/* This is similar to how the kernel handles ONLCR for ttys */
|
||
while (n > 0) {
|
||
if (*s == '\r') {
|
||
next = s + 1;
|
||
ttywriteraw("\r\n", 2);
|
||
} else {
|
||
next = memchr(s, '\r', n);
|
||
DEFAULT(next, s + n);
|
||
ttywriteraw(s, next - s);
|
||
}
|
||
n -= next - s;
|
||
s = next;
|
||
}
|
||
}
|
||
|
||
void
|
||
ttywriteraw(const char *s, size_t n)
|
||
{
|
||
fd_set wfd, rfd;
|
||
ssize_t r;
|
||
size_t lim = 256;
|
||
|
||
/*
|
||
* Remember that we are using a pty, which might be a modem line.
|
||
* Writing too much will clog the line. That's why we are doing this
|
||
* dance.
|
||
* FIXME: Migrate the world to Plan 9.
|
||
*/
|
||
while (n > 0) {
|
||
FD_ZERO(&wfd);
|
||
FD_ZERO(&rfd);
|
||
FD_SET(cmdfd, &wfd);
|
||
FD_SET(cmdfd, &rfd);
|
||
|
||
/* Check if we can write. */
|
||
if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
|
||
if (errno == EINTR)
|
||
continue;
|
||
die("select failed: %s\n", strerror(errno));
|
||
}
|
||
if (FD_ISSET(cmdfd, &wfd)) {
|
||
/*
|
||
* Only write the bytes written by ttywrite() or the
|
||
* default of 256. This seems to be a reasonable value
|
||
* for a serial line. Bigger values might clog the I/O.
|
||
*/
|
||
if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
|
||
goto write_error;
|
||
if (r < n) {
|
||
/*
|
||
* We weren't able to write out everything.
|
||
* This means the buffer is getting full
|
||
* again. Empty it.
|
||
*/
|
||
if (n < lim)
|
||
lim = ttyread();
|
||
n -= r;
|
||
s += r;
|
||
} else {
|
||
/* All bytes have been written. */
|
||
break;
|
||
}
|
||
}
|
||
if (FD_ISSET(cmdfd, &rfd))
|
||
lim = ttyread();
|
||
}
|
||
return;
|
||
|
||
write_error:
|
||
die("write error on tty: %s\n", strerror(errno));
|
||
}
|
||
|
||
void
|
||
ttyresize(int tw, int th)
|
||
{
|
||
struct winsize w;
|
||
|
||
w.ws_row = term.row;
|
||
w.ws_col = term.col;
|
||
w.ws_xpixel = tw;
|
||
w.ws_ypixel = th;
|
||
if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
|
||
fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
|
||
}
|
||
|
||
void
|
||
ttyhangup(void)
|
||
{
|
||
/* Send SIGHUP to shell */
|
||
kill(pid, SIGHUP);
|
||
}
|
||
|
||
int
|
||
tattrset(int attr)
|
||
{
|
||
int i, j;
|
||
|
||
for (i = 0; i < term.row-1; i++) {
|
||
for (j = 0; j < term.col-1; j++) {
|
||
if (term.line[i][j].mode & attr)
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
tsetdirt(int top, int bot)
|
||
{
|
||
int i;
|
||
|
||
LIMIT(top, 0, term.row-1);
|
||
LIMIT(bot, 0, term.row-1);
|
||
|
||
for (i = top; i <= bot; i++)
|
||
term.dirty[i] = 1;
|
||
}
|
||
|
||
void
|
||
tsetdirtattr(int attr)
|
||
{
|
||
int i, j;
|
||
|
||
for (i = 0; i < term.row-1; i++) {
|
||
for (j = 0; j < term.col-1; j++) {
|
||
if (term.line[i][j].mode & attr) {
|
||
term.dirty[i] = 1;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
tfulldirt(void)
|
||
{
|
||
for (int i = 0; i < term.row; i++)
|
||
term.dirty[i] = 1;
|
||
}
|
||
|
||
void
|
||
tcursor(int mode)
|
||
{
|
||
static TCursor c[2];
|
||
int alt = IS_SET(MODE_ALTSCREEN);
|
||
|
||
if (mode == CURSOR_SAVE) {
|
||
c[alt] = term.c;
|
||
} else if (mode == CURSOR_LOAD) {
|
||
term.c = c[alt];
|
||
tmoveto(c[alt].x, c[alt].y);
|
||
}
|
||
}
|
||
|
||
void
|
||
tresetcursor(void)
|
||
{
|
||
term.c = (TCursor){ { .mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg },
|
||
.x = 0, .y = 0, .state = CURSOR_DEFAULT };
|
||
}
|
||
|
||
void
|
||
treset(void)
|
||
{
|
||
uint i;
|
||
int x, y;
|
||
|
||
tresetcursor();
|
||
|
||
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
|
||
for (i = tabspaces; i < term.col; i += tabspaces)
|
||
term.tabs[i] = 1;
|
||
term.top = 0;
|
||
term.histf = 0;
|
||
term.scr = 0;
|
||
term.bot = term.row - 1;
|
||
term.mode = MODE_WRAP|MODE_UTF8;
|
||
memset(term.trantbl, CS_USA, sizeof(term.trantbl));
|
||
term.charset = 0;
|
||
|
||
selremove();
|
||
for (i = 0; i < 2; i++) {
|
||
tcursor(CURSOR_SAVE); /* reset saved cursor */
|
||
for (y = 0; y < term.row; y++)
|
||
for (x = 0; x < term.col; x++)
|
||
tclearglyph(&term.line[y][x], 0);
|
||
tswapscreen();
|
||
}
|
||
tfulldirt();
|
||
}
|
||
|
||
void
|
||
tnew(int col, int row)
|
||
{
|
||
int i, j;
|
||
|
||
for (i = 0; i < 2; i++) {
|
||
term.line = xmalloc(row * sizeof(Line));
|
||
for (j = 0; j < row; j++)
|
||
term.line[j] = xmalloc(col * sizeof(Glyph));
|
||
term.col = col, term.row = row;
|
||
tswapscreen();
|
||
}
|
||
term.dirty = xmalloc(row * sizeof(*term.dirty));
|
||
term.tabs = xmalloc(col * sizeof(*term.tabs));
|
||
for (i = 0; i < HISTSIZE; i++)
|
||
term.hist[i] = xmalloc(col * sizeof(Glyph));
|
||
treset();
|
||
}
|
||
|
||
int tisaltscr(void)
|
||
{
|
||
return IS_SET(MODE_ALTSCREEN);
|
||
}
|
||
|
||
/* handle it with care */
|
||
void
|
||
tswapscreen(void)
|
||
{
|
||
static Line *altline;
|
||
static int altcol, altrow;
|
||
Line *tmpline = term.line;
|
||
int tmpcol = term.col, tmprow = term.row;
|
||
|
||
term.line = altline;
|
||
term.col = altcol, term.row = altrow;
|
||
altline = tmpline;
|
||
altcol = tmpcol, altrow = tmprow;
|
||
term.mode ^= MODE_ALTSCREEN;
|
||
}
|
||
|
||
void
|
||
tloaddefscreen(int clear, int loadcursor)
|
||
{
|
||
int col, row, alt = IS_SET(MODE_ALTSCREEN);
|
||
|
||
if (alt) {
|
||
if (clear)
|
||
tclearregion(0, 0, term.col-1, term.row-1, 1);
|
||
col = term.col, row = term.row;
|
||
tswapscreen();
|
||
}
|
||
if (loadcursor)
|
||
tcursor(CURSOR_LOAD);
|
||
if (alt)
|
||
tresizedef(col, row);
|
||
}
|
||
|
||
void
|
||
tloadaltscreen(int clear, int savecursor)
|
||
{
|
||
int col, row, def = !IS_SET(MODE_ALTSCREEN);
|
||
|
||
if (savecursor)
|
||
tcursor(CURSOR_SAVE);
|
||
if (def) {
|
||
col = term.col, row = term.row;
|
||
tswapscreen();
|
||
term.scr = 0;
|
||
tresizealt(col, row);
|
||
}
|
||
if (clear)
|
||
tclearregion(0, 0, term.col-1, term.row-1, 1);
|
||
}
|
||
|
||
int
|
||
tisaltscreen(void)
|
||
{
|
||
return IS_SET(MODE_ALTSCREEN);
|
||
}
|
||
|
||
void
|
||
kscrolldown(const Arg* a)
|
||
{
|
||
int n = a->i;
|
||
|
||
if (!term.scr || IS_SET(MODE_ALTSCREEN))
|
||
return;
|
||
|
||
if (n < 0)
|
||
n = MAX(term.row / -n, 1);
|
||
|
||
if (n <= term.scr) {
|
||
term.scr -= n;
|
||
} else {
|
||
n = term.scr;
|
||
term.scr = 0;
|
||
}
|
||
|
||
if (sel.ob.x != -1 && !sel.alt)
|
||
selmove(-n); /* negate change in term.scr */
|
||
tfulldirt();
|
||
}
|
||
|
||
void
|
||
kscrollup(const Arg* a)
|
||
{
|
||
int n = a->i;
|
||
|
||
if (!term.histf || IS_SET(MODE_ALTSCREEN))
|
||
return;
|
||
|
||
if (n < 0)
|
||
n = MAX(term.row / -n, 1);
|
||
|
||
if (term.scr + n <= term.histf) {
|
||
term.scr += n;
|
||
} else {
|
||
n = term.histf - term.scr;
|
||
term.scr = term.histf;
|
||
}
|
||
|
||
if (sel.ob.x != -1 && !sel.alt)
|
||
selmove(n); /* negate change in term.scr */
|
||
tfulldirt();
|
||
}
|
||
|
||
void
|
||
tscrolldown(int top, int n)
|
||
{
|
||
int i, bot = term.bot;
|
||
Line temp;
|
||
|
||
if (n <= 0)
|
||
return;
|
||
n = MIN(n, bot-top+1);
|
||
|
||
tsetdirt(top, bot-n);
|
||
tclearregion(0, bot-n+1, term.col-1, bot, 1);
|
||
|
||
for (i = bot; i >= top+n; i--) {
|
||
temp = term.line[i];
|
||
term.line[i] = term.line[i-n];
|
||
term.line[i-n] = temp;
|
||
}
|
||
|
||
if (sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN))
|
||
selscroll(top, bot, n);
|
||
}
|
||
|
||
void
|
||
tscrollup(int top, int bot, int n, int mode)
|
||
{
|
||
int i, j, s;
|
||
int alt = IS_SET(MODE_ALTSCREEN);
|
||
int savehist = !alt && top == 0 && mode != SCROLL_NOSAVEHIST;
|
||
Line temp;
|
||
|
||
if (n <= 0)
|
||
return;
|
||
n = MIN(n, bot-top+1);
|
||
|
||
if (savehist) {
|
||
for (i = 0; i < n; i++) {
|
||
term.histi = (term.histi + 1) % HISTSIZE;
|
||
temp = term.hist[term.histi];
|
||
for (j = 0; j < term.col; j++)
|
||
tclearglyph(&temp[j], 1);
|
||
term.hist[term.histi] = term.line[i];
|
||
term.line[i] = temp;
|
||
}
|
||
term.histf = MIN(term.histf + n, HISTSIZE);
|
||
s = n;
|
||
if (term.scr) {
|
||
j = term.scr;
|
||
term.scr = MIN(j + n, HISTSIZE);
|
||
s = j + n - term.scr;
|
||
}
|
||
if (mode != SCROLL_RESIZE)
|
||
tfulldirt();
|
||
} else {
|
||
tclearregion(0, top, term.col-1, top+n-1, 1);
|
||
tsetdirt(top+n, bot);
|
||
}
|
||
|
||
for (i = top; i <= bot-n; i++) {
|
||
temp = term.line[i];
|
||
term.line[i] = term.line[i+n];
|
||
term.line[i+n] = temp;
|
||
}
|
||
|
||
if (sel.ob.x != -1 && sel.alt == alt) {
|
||
if (!savehist) {
|
||
selscroll(top, bot, -n);
|
||
} else if (s > 0) {
|
||
selmove(-s);
|
||
if (-term.scr + sel.nb.y < -term.histf)
|
||
selremove();
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
selmove(int n)
|
||
{
|
||
sel.ob.y += n, sel.nb.y += n;
|
||
sel.oe.y += n, sel.ne.y += n;
|
||
}
|
||
|
||
void
|
||
selscroll(int top, int bot, int n)
|
||
{
|
||
/* turn absolute coordinates into relative */
|
||
top += term.scr, bot += term.scr;
|
||
|
||
if (BETWEEN(sel.nb.y, top, bot) != BETWEEN(sel.ne.y, top, bot)) {
|
||
selclear();
|
||
} else if (BETWEEN(sel.nb.y, top, bot)) {
|
||
selmove(n);
|
||
if (sel.nb.y < top || sel.ne.y > bot)
|
||
selclear();
|
||
}
|
||
}
|
||
|
||
void
|
||
tnewline(int first_col)
|
||
{
|
||
int y = term.c.y;
|
||
|
||
if (y == term.bot) {
|
||
tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
|
||
} else {
|
||
y++;
|
||
}
|
||
tmoveto(first_col ? 0 : term.c.x, y);
|
||
}
|
||
|
||
void
|
||
csiparse(void)
|
||
{
|
||
char *p = csiescseq.buf, *np;
|
||
long int v;
|
||
|
||
csiescseq.narg = 0;
|
||
if (*p == '?') {
|
||
csiescseq.priv = 1;
|
||
p++;
|
||
}
|
||
|
||
csiescseq.buf[csiescseq.len] = '\0';
|
||
while (p < csiescseq.buf+csiescseq.len) {
|
||
np = NULL;
|
||
v = strtol(p, &np, 10);
|
||
if (np == p)
|
||
v = 0;
|
||
if (v == LONG_MAX || v == LONG_MIN)
|
||
v = -1;
|
||
csiescseq.arg[csiescseq.narg++] = v;
|
||
p = np;
|
||
if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
|
||
break;
|
||
p++;
|
||
}
|
||
csiescseq.mode[0] = *p++;
|
||
csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
|
||
}
|
||
|
||
/* for absolute user moves, when decom is set */
|
||
void
|
||
tmoveato(int x, int y)
|
||
{
|
||
tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
|
||
}
|
||
|
||
void
|
||
tmoveto(int x, int y)
|
||
{
|
||
int miny, maxy;
|
||
|
||
if (term.c.state & CURSOR_ORIGIN) {
|
||
miny = term.top;
|
||
maxy = term.bot;
|
||
} else {
|
||
miny = 0;
|
||
maxy = term.row - 1;
|
||
}
|
||
term.c.state &= ~CURSOR_WRAPNEXT;
|
||
term.c.x = LIMIT(x, 0, term.col-1);
|
||
term.c.y = LIMIT(y, miny, maxy);
|
||
}
|
||
|
||
void
|
||
tsetchar(Rune u, const Glyph *attr, int x, int y)
|
||
{
|
||
static const char *vt100_0[62] = { /* 0x41 - 0x7e */
|
||
"↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
|
||
0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
|
||
0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
|
||
0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
|
||
"◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
|
||
"", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
|
||
"⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
|
||
"│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
|
||
};
|
||
|
||
/*
|
||
* The table is proudly stolen from rxvt.
|
||
*/
|
||
if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
|
||
BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
|
||
utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
|
||
|
||
if (term.line[y][x].mode & ATTR_WIDE) {
|
||
if (x+1 < term.col) {
|
||
term.line[y][x+1].u = ' ';
|
||
term.line[y][x+1].mode &= ~ATTR_WDUMMY;
|
||
}
|
||
} else if (term.line[y][x].mode & ATTR_WDUMMY) {
|
||
term.line[y][x-1].u = ' ';
|
||
term.line[y][x-1].mode &= ~ATTR_WIDE;
|
||
}
|
||
|
||
term.dirty[y] = 1;
|
||
term.line[y][x] = *attr;
|
||
term.line[y][x].u = u;
|
||
term.line[y][x].mode |= ATTR_SET;
|
||
}
|
||
|
||
void
|
||
tclearglyph(Glyph *gp, int usecurattr)
|
||
{
|
||
if (usecurattr) {
|
||
gp->fg = term.c.attr.fg;
|
||
gp->bg = term.c.attr.bg;
|
||
} else {
|
||
gp->fg = defaultfg;
|
||
gp->bg = defaultbg;
|
||
}
|
||
gp->mode = ATTR_NULL;
|
||
gp->u = ' ';
|
||
}
|
||
|
||
void
|
||
tclearregion(int x1, int y1, int x2, int y2, int usecurattr)
|
||
{
|
||
int x, y;
|
||
|
||
/* regionselected() takes relative coordinates */
|
||
if (regionselected(x1+term.scr, y1+term.scr, x2+term.scr, y2+term.scr))
|
||
selremove();
|
||
|
||
for (y = y1; y <= y2; y++) {
|
||
term.dirty[y] = 1;
|
||
for (x = x1; x <= x2; x++)
|
||
tclearglyph(&term.line[y][x], usecurattr);
|
||
}
|
||
}
|
||
|
||
void
|
||
tdeletechar(int n)
|
||
{
|
||
int src, dst, size;
|
||
Line line;
|
||
|
||
if (n <= 0)
|
||
return;
|
||
dst = term.c.x;
|
||
src = MIN(term.c.x + n, term.col);
|
||
size = term.col - src;
|
||
if (size > 0) { /* otherwise src would point beyond the array
|
||
https://stackoverflow.com/questions/29844298 */
|
||
line = term.line[term.c.y];
|
||
memmove(&line[dst], &line[src], size * sizeof(Glyph));
|
||
}
|
||
tclearregion(dst + size, term.c.y, term.col - 1, term.c.y, 1);
|
||
}
|
||
|
||
void
|
||
tinsertblank(int n)
|
||
{
|
||
int src, dst, size;
|
||
Line line;
|
||
|
||
if (n <= 0)
|
||
return;
|
||
dst = MIN(term.c.x + n, term.col);
|
||
src = term.c.x;
|
||
size = term.col - dst;
|
||
if (size > 0) { /* otherwise dst would point beyond the array */
|
||
line = term.line[term.c.y];
|
||
memmove(&line[dst], &line[src], size * sizeof(Glyph));
|
||
}
|
||
tclearregion(src, term.c.y, dst - 1, term.c.y, 1);
|
||
}
|
||
|
||
void
|
||
tinsertblankline(int n)
|
||
{
|
||
if (BETWEEN(term.c.y, term.top, term.bot))
|
||
tscrolldown(term.c.y, n);
|
||
}
|
||
|
||
void
|
||
tdeleteline(int n)
|
||
{
|
||
if (BETWEEN(term.c.y, term.top, term.bot))
|
||
tscrollup(term.c.y, term.bot, n, SCROLL_NOSAVEHIST);
|
||
}
|
||
|
||
int32_t
|
||
tdefcolor(const int *attr, int *npar, int l)
|
||
{
|
||
int32_t idx = -1;
|
||
uint r, g, b;
|
||
|
||
switch (attr[*npar + 1]) {
|
||
case 2: /* direct color in RGB space */
|
||
if (*npar + 4 >= l) {
|
||
fprintf(stderr,
|
||
"erresc(38): Incorrect number of parameters (%d)\n",
|
||
*npar);
|
||
break;
|
||
}
|
||
r = attr[*npar + 2];
|
||
g = attr[*npar + 3];
|
||
b = attr[*npar + 4];
|
||
*npar += 4;
|
||
if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
|
||
fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
|
||
r, g, b);
|
||
else
|
||
idx = TRUECOLOR(r, g, b);
|
||
break;
|
||
case 5: /* indexed color */
|
||
if (*npar + 2 >= l) {
|
||
fprintf(stderr,
|
||
"erresc(38): Incorrect number of parameters (%d)\n",
|
||
*npar);
|
||
break;
|
||
}
|
||
*npar += 2;
|
||
if (!BETWEEN(attr[*npar], 0, 255))
|
||
fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
|
||
else
|
||
idx = attr[*npar];
|
||
break;
|
||
case 0: /* implemented defined (only foreground) */
|
||
case 1: /* transparent */
|
||
case 3: /* direct color in CMY space */
|
||
case 4: /* direct color in CMYK space */
|
||
default:
|
||
fprintf(stderr,
|
||
"erresc(38): gfx attr %d unknown\n", attr[*npar]);
|
||
break;
|
||
}
|
||
|
||
return idx;
|
||
}
|
||
|
||
void
|
||
tsetattr(const int *attr, int l)
|
||
{
|
||
int i;
|
||
int32_t idx;
|
||
|
||
for (i = 0; i < l; i++) {
|
||
switch (attr[i]) {
|
||
case 0:
|
||
term.c.attr.mode &= ~(
|
||
ATTR_BOLD |
|
||
ATTR_FAINT |
|
||
ATTR_ITALIC |
|
||
ATTR_UNDERLINE |
|
||
ATTR_BLINK |
|
||
ATTR_REVERSE |
|
||
ATTR_INVISIBLE |
|
||
ATTR_STRUCK );
|
||
term.c.attr.fg = defaultfg;
|
||
term.c.attr.bg = defaultbg;
|
||
break;
|
||
case 1:
|
||
term.c.attr.mode |= ATTR_BOLD;
|
||
break;
|
||
case 2:
|
||
term.c.attr.mode |= ATTR_FAINT;
|
||
break;
|
||
case 3:
|
||
term.c.attr.mode |= ATTR_ITALIC;
|
||
break;
|
||
case 4:
|
||
term.c.attr.mode |= ATTR_UNDERLINE;
|
||
break;
|
||
case 5: /* slow blink */
|
||
/* FALLTHROUGH */
|
||
case 6: /* rapid blink */
|
||
term.c.attr.mode |= ATTR_BLINK;
|
||
break;
|
||
case 7:
|
||
term.c.attr.mode |= ATTR_REVERSE;
|
||
break;
|
||
case 8:
|
||
term.c.attr.mode |= ATTR_INVISIBLE;
|
||
break;
|
||
case 9:
|
||
term.c.attr.mode |= ATTR_STRUCK;
|
||
break;
|
||
case 22:
|
||
term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
|
||
break;
|
||
case 23:
|
||
term.c.attr.mode &= ~ATTR_ITALIC;
|
||
break;
|
||
case 24:
|
||
term.c.attr.mode &= ~ATTR_UNDERLINE;
|
||
break;
|
||
case 25:
|
||
term.c.attr.mode &= ~ATTR_BLINK;
|
||
break;
|
||
case 27:
|
||
term.c.attr.mode &= ~ATTR_REVERSE;
|
||
break;
|
||
case 28:
|
||
term.c.attr.mode &= ~ATTR_INVISIBLE;
|
||
break;
|
||
case 29:
|
||
term.c.attr.mode &= ~ATTR_STRUCK;
|
||
break;
|
||
case 38:
|
||
if ((idx = tdefcolor(attr, &i, l)) >= 0)
|
||
term.c.attr.fg = idx;
|
||
break;
|
||
case 39:
|
||
term.c.attr.fg = defaultfg;
|
||
break;
|
||
case 48:
|
||
if ((idx = tdefcolor(attr, &i, l)) >= 0)
|
||
term.c.attr.bg = idx;
|
||
break;
|
||
case 49:
|
||
term.c.attr.bg = defaultbg;
|
||
break;
|
||
default:
|
||
if (BETWEEN(attr[i], 30, 37)) {
|
||
term.c.attr.fg = attr[i] - 30;
|
||
} else if (BETWEEN(attr[i], 40, 47)) {
|
||
term.c.attr.bg = attr[i] - 40;
|
||
} else if (BETWEEN(attr[i], 90, 97)) {
|
||
term.c.attr.fg = attr[i] - 90 + 8;
|
||
} else if (BETWEEN(attr[i], 100, 107)) {
|
||
term.c.attr.bg = attr[i] - 100 + 8;
|
||
} else {
|
||
fprintf(stderr,
|
||
"erresc(default): gfx attr %d unknown\n",
|
||
attr[i]);
|
||
csidump();
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
tsetscroll(int t, int b)
|
||
{
|
||
int temp;
|
||
|
||
LIMIT(t, 0, term.row-1);
|
||
LIMIT(b, 0, term.row-1);
|
||
if (t > b) {
|
||
temp = t;
|
||
t = b;
|
||
b = temp;
|
||
}
|
||
term.top = t;
|
||
term.bot = b;
|
||
}
|
||
|
||
void
|
||
tsetmode(int priv, int set, const int *args, int narg)
|
||
{
|
||
const int *lim;
|
||
|
||
for (lim = args + narg; args < lim; ++args) {
|
||
if (priv) {
|
||
switch (*args) {
|
||
case 1: /* DECCKM -- Cursor key */
|
||
xsetmode(set, MODE_APPCURSOR);
|
||
break;
|
||
case 5: /* DECSCNM -- Reverse video */
|
||
xsetmode(set, MODE_REVERSE);
|
||
break;
|
||
case 6: /* DECOM -- Origin */
|
||
MODBIT(term.c.state, set, CURSOR_ORIGIN);
|
||
tmoveato(0, 0);
|
||
break;
|
||
case 7: /* DECAWM -- Auto wrap */
|
||
MODBIT(term.mode, set, MODE_WRAP);
|
||
break;
|
||
case 0: /* Error (IGNORED) */
|
||
case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
|
||
case 3: /* DECCOLM -- Column (IGNORED) */
|
||
case 4: /* DECSCLM -- Scroll (IGNORED) */
|
||
case 8: /* DECARM -- Auto repeat (IGNORED) */
|
||
case 18: /* DECPFF -- Printer feed (IGNORED) */
|
||
case 19: /* DECPEX -- Printer extent (IGNORED) */
|
||
case 42: /* DECNRCM -- National characters (IGNORED) */
|
||
case 12: /* att610 -- Start blinking cursor (IGNORED) */
|
||
break;
|
||
case 25: /* DECTCEM -- Text Cursor Enable Mode */
|
||
xsetmode(!set, MODE_HIDE);
|
||
break;
|
||
case 9: /* X10 mouse compatibility mode */
|
||
xsetpointermotion(0);
|
||
xsetmode(0, MODE_MOUSE);
|
||
xsetmode(set, MODE_MOUSEX10);
|
||
break;
|
||
case 1000: /* 1000: report button press */
|
||
xsetpointermotion(0);
|
||
xsetmode(0, MODE_MOUSE);
|
||
xsetmode(set, MODE_MOUSEBTN);
|
||
break;
|
||
case 1002: /* 1002: report motion on button press */
|
||
xsetpointermotion(0);
|
||
xsetmode(0, MODE_MOUSE);
|
||
xsetmode(set, MODE_MOUSEMOTION);
|
||
break;
|
||
case 1003: /* 1003: enable all mouse motions */
|
||
xsetpointermotion(set);
|
||
xsetmode(0, MODE_MOUSE);
|
||
xsetmode(set, MODE_MOUSEMANY);
|
||
break;
|
||
case 1004: /* 1004: send focus events to tty */
|
||
xsetmode(set, MODE_FOCUS);
|
||
break;
|
||
case 1006: /* 1006: extended reporting mode */
|
||
xsetmode(set, MODE_MOUSESGR);
|
||
break;
|
||
case 1034:
|
||
xsetmode(set, MODE_8BIT);
|
||
break;
|
||
case 1049: /* swap screen & set/restore cursor as xterm */
|
||
case 47: /* swap screen */
|
||
case 1047: /* swap screen, clearing alternate screen */
|
||
if (!allowaltscreen)
|
||
break;
|
||
if (set)
|
||
tloadaltscreen(*args == 1049, *args == 1049);
|
||
else
|
||
tloaddefscreen(*args == 1047, *args == 1049);
|
||
break;
|
||
case 1048:
|
||
if (!allowaltscreen)
|
||
break;
|
||
tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
|
||
break;
|
||
case 2004: /* 2004: bracketed paste mode */
|
||
xsetmode(set, MODE_BRCKTPASTE);
|
||
break;
|
||
/* Not implemented mouse modes. See comments there. */
|
||
case 1001: /* mouse highlight mode; can hang the
|
||
terminal by design when implemented. */
|
||
case 1005: /* UTF-8 mouse mode; will confuse
|
||
applications not supporting UTF-8
|
||
and luit. */
|
||
case 1015: /* urxvt mangled mouse mode; incompatible
|
||
and can be mistaken for other control
|
||
codes. */
|
||
break;
|
||
default:
|
||
fprintf(stderr,
|
||
"erresc: unknown private set/reset mode %d\n",
|
||
*args);
|
||
break;
|
||
}
|
||
} else {
|
||
switch (*args) {
|
||
case 0: /* Error (IGNORED) */
|
||
break;
|
||
case 2:
|
||
xsetmode(set, MODE_KBDLOCK);
|
||
break;
|
||
case 4: /* IRM -- Insertion-replacement */
|
||
MODBIT(term.mode, set, MODE_INSERT);
|
||
break;
|
||
case 12: /* SRM -- Send/Receive */
|
||
MODBIT(term.mode, !set, MODE_ECHO);
|
||
break;
|
||
case 20: /* LNM -- Linefeed/new line */
|
||
MODBIT(term.mode, set, MODE_CRLF);
|
||
break;
|
||
default:
|
||
fprintf(stderr,
|
||
"erresc: unknown set/reset mode %d\n",
|
||
*args);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
csihandle(void)
|
||
{
|
||
char buf[40];
|
||
int n, x;
|
||
|
||
switch (csiescseq.mode[0]) {
|
||
default:
|
||
unknown:
|
||
fprintf(stderr, "erresc: unknown csi ");
|
||
csidump();
|
||
/* die(""); */
|
||
break;
|
||
case '@': /* ICH -- Insert <n> blank char */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tinsertblank(csiescseq.arg[0]);
|
||
break;
|
||
case 'A': /* CUU -- Cursor <n> Up */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
|
||
break;
|
||
case 'B': /* CUD -- Cursor <n> Down */
|
||
case 'e': /* VPR --Cursor <n> Down */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
|
||
break;
|
||
case 'i': /* MC -- Media Copy */
|
||
switch (csiescseq.arg[0]) {
|
||
case 0:
|
||
tdump();
|
||
break;
|
||
case 1:
|
||
tdumpline(term.c.y);
|
||
break;
|
||
case 2:
|
||
tdumpsel();
|
||
break;
|
||
case 4:
|
||
term.mode &= ~MODE_PRINT;
|
||
break;
|
||
case 5:
|
||
term.mode |= MODE_PRINT;
|
||
break;
|
||
}
|
||
break;
|
||
case 'c': /* DA -- Device Attributes */
|
||
if (csiescseq.arg[0] == 0)
|
||
ttywrite(vtiden, strlen(vtiden), 0);
|
||
break;
|
||
case 'b': /* REP -- if last char is printable print it <n> more times */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
if (term.lastc)
|
||
while (csiescseq.arg[0]-- > 0)
|
||
tputc(term.lastc);
|
||
break;
|
||
case 'C': /* CUF -- Cursor <n> Forward */
|
||
case 'a': /* HPR -- Cursor <n> Forward */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
|
||
break;
|
||
case 'D': /* CUB -- Cursor <n> Backward */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
|
||
break;
|
||
case 'E': /* CNL -- Cursor <n> Down and first col */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(0, term.c.y+csiescseq.arg[0]);
|
||
break;
|
||
case 'F': /* CPL -- Cursor <n> Up and first col */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(0, term.c.y-csiescseq.arg[0]);
|
||
break;
|
||
case 'g': /* TBC -- Tabulation clear */
|
||
switch (csiescseq.arg[0]) {
|
||
case 0: /* clear current tab stop */
|
||
term.tabs[term.c.x] = 0;
|
||
break;
|
||
case 3: /* clear all the tabs */
|
||
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
|
||
break;
|
||
default:
|
||
goto unknown;
|
||
}
|
||
break;
|
||
case 'G': /* CHA -- Move to <col> */
|
||
case '`': /* HPA */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveto(csiescseq.arg[0]-1, term.c.y);
|
||
break;
|
||
case 'H': /* CUP -- Move to <row> <col> */
|
||
case 'f': /* HVP */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
DEFAULT(csiescseq.arg[1], 1);
|
||
tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
|
||
break;
|
||
case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tputtab(csiescseq.arg[0]);
|
||
break;
|
||
case 'J': /* ED -- Clear screen */
|
||
switch (csiescseq.arg[0]) {
|
||
case 0: /* below */
|
||
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
|
||
if (term.c.y < term.row-1) {
|
||
tclearregion(0, term.c.y+1, term.col-1, term.row-1, 1);
|
||
}
|
||
break;
|
||
case 1: /* above */
|
||
if (term.c.y >= 1)
|
||
tclearregion(0, 0, term.col-1, term.c.y-1, 1);
|
||
tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
|
||
break;
|
||
case 2: /* all */
|
||
if (IS_SET(MODE_ALTSCREEN)) {
|
||
tclearregion(0, 0, term.col-1, term.row-1, 1);
|
||
break;
|
||
}
|
||
/* vte does this:
|
||
tscrollup(0, term.row-1, term.row, SCROLL_SAVEHIST); */
|
||
|
||
/* alacritty does this: */
|
||
for (n = term.row-1; n >= 0 && tlinelen(term.line[n]) == 0; n--);
|
||
if (n >= 0)
|
||
tscrollup(0, term.row-1, n+1, SCROLL_SAVEHIST);
|
||
tscrollup(0, term.row-1, term.row-n-1, SCROLL_NOSAVEHIST);
|
||
break;
|
||
default:
|
||
goto unknown;
|
||
}
|
||
break;
|
||
case 'K': /* EL -- Clear line */
|
||
switch (csiescseq.arg[0]) {
|
||
case 0: /* right */
|
||
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
|
||
break;
|
||
case 1: /* left */
|
||
tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
|
||
break;
|
||
case 2: /* all */
|
||
tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
|
||
break;
|
||
}
|
||
break;
|
||
case 'S': /* SU -- Scroll <n> line up */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
/* xterm, urxvt, alacritty save this in history */
|
||
tscrollup(term.top, term.bot, csiescseq.arg[0], SCROLL_SAVEHIST);
|
||
break;
|
||
case 'T': /* SD -- Scroll <n> line down */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tscrolldown(term.top, csiescseq.arg[0]);
|
||
break;
|
||
case 'L': /* IL -- Insert <n> blank lines */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tinsertblankline(csiescseq.arg[0]);
|
||
break;
|
||
case 'l': /* RM -- Reset Mode */
|
||
tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
|
||
break;
|
||
case 'M': /* DL -- Delete <n> lines */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tdeleteline(csiescseq.arg[0]);
|
||
break;
|
||
case 'X': /* ECH -- Erase <n> char */
|
||
if (csiescseq.arg[0] < 0)
|
||
return;
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
x = MIN(term.c.x + csiescseq.arg[0], term.col) - 1;
|
||
tclearregion(term.c.x, term.c.y, x, term.c.y, 1);
|
||
break;
|
||
case 'P': /* DCH -- Delete <n> char */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tdeletechar(csiescseq.arg[0]);
|
||
break;
|
||
case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tputtab(-csiescseq.arg[0]);
|
||
break;
|
||
case 'd': /* VPA -- Move to <row> */
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
tmoveato(term.c.x, csiescseq.arg[0]-1);
|
||
break;
|
||
case 'h': /* SM -- Set terminal mode */
|
||
tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
|
||
break;
|
||
case 'm': /* SGR -- Terminal attribute (color) */
|
||
tsetattr(csiescseq.arg, csiescseq.narg);
|
||
break;
|
||
case 'n': /* DSR – Device Status Report (cursor position) */
|
||
if (csiescseq.arg[0] == 6) {
|
||
n = snprintf(buf, sizeof(buf), "\033[%i;%iR",
|
||
term.c.y+1, term.c.x+1);
|
||
ttywrite(buf, n, 0);
|
||
}
|
||
break;
|
||
case 'r': /* DECSTBM -- Set Scrolling Region */
|
||
if (csiescseq.priv) {
|
||
goto unknown;
|
||
} else {
|
||
DEFAULT(csiescseq.arg[0], 1);
|
||
DEFAULT(csiescseq.arg[1], term.row);
|
||
tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
|
||
tmoveato(0, 0);
|
||
}
|
||
break;
|
||
case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
|
||
tcursor(CURSOR_SAVE);
|
||
break;
|
||
case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
|
||
tcursor(CURSOR_LOAD);
|
||
break;
|
||
case ' ':
|
||
switch (csiescseq.mode[1]) {
|
||
case 'q': /* DECSCUSR -- Set Cursor Style */
|
||
if (xsetcursor(csiescseq.arg[0]))
|
||
goto unknown;
|
||
break;
|
||
default:
|
||
goto unknown;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
void
|
||
csidump(void)
|
||
{
|
||
size_t i;
|
||
uint c;
|
||
|
||
fprintf(stderr, "ESC[");
|
||
for (i = 0; i < csiescseq.len; i++) {
|
||
c = csiescseq.buf[i] & 0xff;
|
||
if (isprint(c)) {
|
||
putc(c, stderr);
|
||
} else if (c == '\n') {
|
||
fprintf(stderr, "(\\n)");
|
||
} else if (c == '\r') {
|
||
fprintf(stderr, "(\\r)");
|
||
} else if (c == 0x1b) {
|
||
fprintf(stderr, "(\\e)");
|
||
} else {
|
||
fprintf(stderr, "(%02x)", c);
|
||
}
|
||
}
|
||
putc('\n', stderr);
|
||
}
|
||
|
||
void
|
||
csireset(void)
|
||
{
|
||
memset(&csiescseq, 0, sizeof(csiescseq));
|
||
}
|
||
|
||
void
|
||
osc_color_response(int num, int index, int is_osc4)
|
||
{
|
||
int n;
|
||
char buf[32];
|
||
unsigned char r, g, b;
|
||
|
||
if (xgetcolor(is_osc4 ? num : index, &r, &g, &b)) {
|
||
fprintf(stderr, "erresc: failed to fetch %s color %d\n",
|
||
is_osc4 ? "osc4" : "osc",
|
||
is_osc4 ? num : index);
|
||
return;
|
||
}
|
||
|
||
n = snprintf(buf, sizeof buf, "\033]%s%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
|
||
is_osc4 ? "4;" : "", num, r, r, g, g, b, b);
|
||
if (n < 0 || n >= sizeof(buf)) {
|
||
fprintf(stderr, "error: %s while printing %s response\n",
|
||
n < 0 ? "snprintf failed" : "truncation occurred",
|
||
is_osc4 ? "osc4" : "osc");
|
||
} else {
|
||
ttywrite(buf, n, 1);
|
||
}
|
||
}
|
||
|
||
void
|
||
strhandle(void)
|
||
{
|
||
char *p = NULL, *dec;
|
||
int j, narg, par;
|
||
const struct { int idx; char *str; } osc_table[] = {
|
||
{ defaultfg, "foreground" },
|
||
{ defaultbg, "background" },
|
||
{ defaultcs, "cursor" }
|
||
};
|
||
|
||
term.esc &= ~(ESC_STR_END|ESC_STR);
|
||
strparse();
|
||
par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
|
||
|
||
switch (strescseq.type) {
|
||
case ']': /* OSC -- Operating System Command */
|
||
switch (par) {
|
||
case 0:
|
||
if (narg > 1) {
|
||
xsettitle(strescseq.args[1]);
|
||
xseticontitle(strescseq.args[1]);
|
||
}
|
||
return;
|
||
case 1:
|
||
if (narg > 1)
|
||
xseticontitle(strescseq.args[1]);
|
||
return;
|
||
case 2:
|
||
if (narg > 1)
|
||
xsettitle(strescseq.args[1]);
|
||
return;
|
||
case 52:
|
||
if (narg > 2 && allowwindowops) {
|
||
dec = base64dec(strescseq.args[2]);
|
||
if (dec) {
|
||
xsetsel(dec);
|
||
xclipcopy();
|
||
} else {
|
||
fprintf(stderr, "erresc: invalid base64\n");
|
||
}
|
||
}
|
||
return;
|
||
case 10:
|
||
case 11:
|
||
case 12:
|
||
if (narg < 2)
|
||
break;
|
||
p = strescseq.args[1];
|
||
if ((j = par - 10) < 0 || j >= LEN(osc_table))
|
||
break; /* shouldn't be possible */
|
||
|
||
if (!strcmp(p, "?")) {
|
||
osc_color_response(par, osc_table[j].idx, 0);
|
||
} else if (xsetcolorname(osc_table[j].idx, p)) {
|
||
fprintf(stderr, "erresc: invalid %s color: %s\n",
|
||
osc_table[j].str, p);
|
||
} else {
|
||
tfulldirt();
|
||
}
|
||
return;
|
||
case 4: /* color set */
|
||
if (narg < 3)
|
||
break;
|
||
p = strescseq.args[2];
|
||
/* FALLTHROUGH */
|
||
case 104: /* color reset */
|
||
j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
|
||
|
||
if (p && !strcmp(p, "?")) {
|
||
osc_color_response(j, 0, 1);
|
||
} else if (xsetcolorname(j, p)) {
|
||
if (par == 104 && narg <= 1)
|
||
return; /* color reset without parameter */
|
||
fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
|
||
j, p ? p : "(null)");
|
||
} else {
|
||
/*
|
||
* TODO if defaultbg color is changed, borders
|
||
* are dirty
|
||
*/
|
||
tfulldirt();
|
||
}
|
||
return;
|
||
}
|
||
break;
|
||
case 'k': /* old title set compatibility */
|
||
xsettitle(strescseq.args[0]);
|
||
return;
|
||
case 'P': /* DCS -- Device Control String */
|
||
case '_': /* APC -- Application Program Command */
|
||
case '^': /* PM -- Privacy Message */
|
||
return;
|
||
}
|
||
|
||
fprintf(stderr, "erresc: unknown str ");
|
||
strdump();
|
||
}
|
||
|
||
void
|
||
strparse(void)
|
||
{
|
||
int c;
|
||
char *p = strescseq.buf;
|
||
|
||
strescseq.narg = 0;
|
||
strescseq.buf[strescseq.len] = '\0';
|
||
|
||
if (*p == '\0')
|
||
return;
|
||
|
||
while (strescseq.narg < STR_ARG_SIZ) {
|
||
strescseq.args[strescseq.narg++] = p;
|
||
while ((c = *p) != ';' && c != '\0')
|
||
++p;
|
||
if (c == '\0')
|
||
return;
|
||
*p++ = '\0';
|
||
}
|
||
}
|
||
|
||
void
|
||
strdump(void)
|
||
{
|
||
size_t i;
|
||
uint c;
|
||
|
||
fprintf(stderr, "ESC%c", strescseq.type);
|
||
for (i = 0; i < strescseq.len; i++) {
|
||
c = strescseq.buf[i] & 0xff;
|
||
if (c == '\0') {
|
||
putc('\n', stderr);
|
||
return;
|
||
} else if (isprint(c)) {
|
||
putc(c, stderr);
|
||
} else if (c == '\n') {
|
||
fprintf(stderr, "(\\n)");
|
||
} else if (c == '\r') {
|
||
fprintf(stderr, "(\\r)");
|
||
} else if (c == 0x1b) {
|
||
fprintf(stderr, "(\\e)");
|
||
} else {
|
||
fprintf(stderr, "(%02x)", c);
|
||
}
|
||
}
|
||
fprintf(stderr, "ESC\\\n");
|
||
}
|
||
|
||
void
|
||
strreset(void)
|
||
{
|
||
strescseq = (STREscape){
|
||
.buf = xrealloc(strescseq.buf, STR_BUF_SIZ),
|
||
.siz = STR_BUF_SIZ,
|
||
};
|
||
}
|
||
|
||
void
|
||
sendbreak(const Arg *arg)
|
||
{
|
||
if (tcsendbreak(cmdfd, 0))
|
||
perror("Error sending break");
|
||
}
|
||
|
||
void
|
||
tprinter(char *s, size_t len)
|
||
{
|
||
if (iofd != -1 && xwrite(iofd, s, len) < 0) {
|
||
perror("Error writing to output file");
|
||
close(iofd);
|
||
iofd = -1;
|
||
}
|
||
}
|
||
|
||
void
|
||
toggleprinter(const Arg *arg)
|
||
{
|
||
term.mode ^= MODE_PRINT;
|
||
}
|
||
|
||
void
|
||
printscreen(const Arg *arg)
|
||
{
|
||
tdump();
|
||
}
|
||
|
||
void
|
||
printsel(const Arg *arg)
|
||
{
|
||
tdumpsel();
|
||
}
|
||
|
||
void
|
||
tdumpsel(void)
|
||
{
|
||
char *ptr;
|
||
|
||
if ((ptr = getsel())) {
|
||
tprinter(ptr, strlen(ptr));
|
||
free(ptr);
|
||
}
|
||
}
|
||
|
||
void
|
||
tdumpline(int n)
|
||
{
|
||
char str[(term.col + 1) * UTF_SIZ];
|
||
tprinter(str, tgetline(str, &term.line[n][0]));
|
||
}
|
||
|
||
void
|
||
tdump(void)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < term.row; ++i)
|
||
tdumpline(i);
|
||
}
|
||
|
||
void
|
||
tputtab(int n)
|
||
{
|
||
uint x = term.c.x;
|
||
|
||
if (n > 0) {
|
||
while (x < term.col && n--)
|
||
for (++x; x < term.col && !term.tabs[x]; ++x)
|
||
/* nothing */ ;
|
||
} else if (n < 0) {
|
||
while (x > 0 && n++)
|
||
for (--x; x > 0 && !term.tabs[x]; --x)
|
||
/* nothing */ ;
|
||
}
|
||
term.c.x = LIMIT(x, 0, term.col-1);
|
||
}
|
||
|
||
void
|
||
tdefutf8(char ascii)
|
||
{
|
||
if (ascii == 'G')
|
||
term.mode |= MODE_UTF8;
|
||
else if (ascii == '@')
|
||
term.mode &= ~MODE_UTF8;
|
||
}
|
||
|
||
void
|
||
tdeftran(char ascii)
|
||
{
|
||
static char cs[] = "0B";
|
||
static int vcs[] = {CS_GRAPHIC0, CS_USA};
|
||
char *p;
|
||
|
||
if ((p = strchr(cs, ascii)) == NULL) {
|
||
fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
|
||
} else {
|
||
term.trantbl[term.icharset] = vcs[p - cs];
|
||
}
|
||
}
|
||
|
||
void
|
||
tdectest(char c)
|
||
{
|
||
int x, y;
|
||
|
||
if (c == '8') { /* DEC screen alignment test. */
|
||
for (x = 0; x < term.col; ++x) {
|
||
for (y = 0; y < term.row; ++y)
|
||
tsetchar('E', &term.c.attr, x, y);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
tstrsequence(uchar c)
|
||
{
|
||
switch (c) {
|
||
case 0x90: /* DCS -- Device Control String */
|
||
c = 'P';
|
||
break;
|
||
case 0x9f: /* APC -- Application Program Command */
|
||
c = '_';
|
||
break;
|
||
case 0x9e: /* PM -- Privacy Message */
|
||
c = '^';
|
||
break;
|
||
case 0x9d: /* OSC -- Operating System Command */
|
||
c = ']';
|
||
break;
|
||
}
|
||
strreset();
|
||
strescseq.type = c;
|
||
term.esc |= ESC_STR;
|
||
}
|
||
|
||
void
|
||
tcontrolcode(uchar ascii)
|
||
{
|
||
switch (ascii) {
|
||
case '\t': /* HT */
|
||
tputtab(1);
|
||
return;
|
||
case '\b': /* BS */
|
||
tmoveto(term.c.x-1, term.c.y);
|
||
return;
|
||
case '\r': /* CR */
|
||
tmoveto(0, term.c.y);
|
||
return;
|
||
case '\f': /* LF */
|
||
case '\v': /* VT */
|
||
case '\n': /* LF */
|
||
/* go to first col if the mode is set */
|
||
tnewline(IS_SET(MODE_CRLF));
|
||
return;
|
||
case '\a': /* BEL */
|
||
if (term.esc & ESC_STR_END) {
|
||
/* backwards compatibility to xterm */
|
||
strhandle();
|
||
} else {
|
||
xbell();
|
||
}
|
||
break;
|
||
case '\033': /* ESC */
|
||
csireset();
|
||
term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
|
||
term.esc |= ESC_START;
|
||
return;
|
||
case '\016': /* SO (LS1 -- Locking shift 1) */
|
||
case '\017': /* SI (LS0 -- Locking shift 0) */
|
||
term.charset = 1 - (ascii - '\016');
|
||
return;
|
||
case '\032': /* SUB */
|
||
tsetchar('?', &term.c.attr, term.c.x, term.c.y);
|
||
/* FALLTHROUGH */
|
||
case '\030': /* CAN */
|
||
csireset();
|
||
break;
|
||
case '\005': /* ENQ (IGNORED) */
|
||
case '\000': /* NUL (IGNORED) */
|
||
case '\021': /* XON (IGNORED) */
|
||
case '\023': /* XOFF (IGNORED) */
|
||
case 0177: /* DEL (IGNORED) */
|
||
return;
|
||
case 0x80: /* TODO: PAD */
|
||
case 0x81: /* TODO: HOP */
|
||
case 0x82: /* TODO: BPH */
|
||
case 0x83: /* TODO: NBH */
|
||
case 0x84: /* TODO: IND */
|
||
break;
|
||
case 0x85: /* NEL -- Next line */
|
||
tnewline(1); /* always go to first col */
|
||
break;
|
||
case 0x86: /* TODO: SSA */
|
||
case 0x87: /* TODO: ESA */
|
||
break;
|
||
case 0x88: /* HTS -- Horizontal tab stop */
|
||
term.tabs[term.c.x] = 1;
|
||
break;
|
||
case 0x89: /* TODO: HTJ */
|
||
case 0x8a: /* TODO: VTS */
|
||
case 0x8b: /* TODO: PLD */
|
||
case 0x8c: /* TODO: PLU */
|
||
case 0x8d: /* TODO: RI */
|
||
case 0x8e: /* TODO: SS2 */
|
||
case 0x8f: /* TODO: SS3 */
|
||
case 0x91: /* TODO: PU1 */
|
||
case 0x92: /* TODO: PU2 */
|
||
case 0x93: /* TODO: STS */
|
||
case 0x94: /* TODO: CCH */
|
||
case 0x95: /* TODO: MW */
|
||
case 0x96: /* TODO: SPA */
|
||
case 0x97: /* TODO: EPA */
|
||
case 0x98: /* TODO: SOS */
|
||
case 0x99: /* TODO: SGCI */
|
||
break;
|
||
case 0x9a: /* DECID -- Identify Terminal */
|
||
ttywrite(vtiden, strlen(vtiden), 0);
|
||
break;
|
||
case 0x9b: /* TODO: CSI */
|
||
case 0x9c: /* TODO: ST */
|
||
break;
|
||
case 0x90: /* DCS -- Device Control String */
|
||
case 0x9d: /* OSC -- Operating System Command */
|
||
case 0x9e: /* PM -- Privacy Message */
|
||
case 0x9f: /* APC -- Application Program Command */
|
||
tstrsequence(ascii);
|
||
return;
|
||
}
|
||
/* only CAN, SUB, \a and C1 chars interrupt a sequence */
|
||
term.esc &= ~(ESC_STR_END|ESC_STR);
|
||
}
|
||
|
||
/*
|
||
* returns 1 when the sequence is finished and it hasn't to read
|
||
* more characters for this sequence, otherwise 0
|
||
*/
|
||
int
|
||
eschandle(uchar ascii)
|
||
{
|
||
switch (ascii) {
|
||
case '[':
|
||
term.esc |= ESC_CSI;
|
||
return 0;
|
||
case '#':
|
||
term.esc |= ESC_TEST;
|
||
return 0;
|
||
case '%':
|
||
term.esc |= ESC_UTF8;
|
||
return 0;
|
||
case 'P': /* DCS -- Device Control String */
|
||
case '_': /* APC -- Application Program Command */
|
||
case '^': /* PM -- Privacy Message */
|
||
case ']': /* OSC -- Operating System Command */
|
||
case 'k': /* old title set compatibility */
|
||
tstrsequence(ascii);
|
||
return 0;
|
||
case 'n': /* LS2 -- Locking shift 2 */
|
||
case 'o': /* LS3 -- Locking shift 3 */
|
||
term.charset = 2 + (ascii - 'n');
|
||
break;
|
||
case '(': /* GZD4 -- set primary charset G0 */
|
||
case ')': /* G1D4 -- set secondary charset G1 */
|
||
case '*': /* G2D4 -- set tertiary charset G2 */
|
||
case '+': /* G3D4 -- set quaternary charset G3 */
|
||
term.icharset = ascii - '(';
|
||
term.esc |= ESC_ALTCHARSET;
|
||
return 0;
|
||
case 'D': /* IND -- Linefeed */
|
||
if (term.c.y == term.bot) {
|
||
tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
|
||
} else {
|
||
tmoveto(term.c.x, term.c.y+1);
|
||
}
|
||
break;
|
||
case 'E': /* NEL -- Next line */
|
||
tnewline(1); /* always go to first col */
|
||
break;
|
||
case 'H': /* HTS -- Horizontal tab stop */
|
||
term.tabs[term.c.x] = 1;
|
||
break;
|
||
case 'M': /* RI -- Reverse index */
|
||
if (term.c.y == term.top) {
|
||
tscrolldown(term.top, 1);
|
||
} else {
|
||
tmoveto(term.c.x, term.c.y-1);
|
||
}
|
||
break;
|
||
case 'Z': /* DECID -- Identify Terminal */
|
||
ttywrite(vtiden, strlen(vtiden), 0);
|
||
break;
|
||
case 'c': /* RIS -- Reset to initial state */
|
||
treset();
|
||
resettitle();
|
||
xloadcols();
|
||
break;
|
||
case '=': /* DECPAM -- Application keypad */
|
||
xsetmode(1, MODE_APPKEYPAD);
|
||
break;
|
||
case '>': /* DECPNM -- Normal keypad */
|
||
xsetmode(0, MODE_APPKEYPAD);
|
||
break;
|
||
case '7': /* DECSC -- Save Cursor */
|
||
tcursor(CURSOR_SAVE);
|
||
break;
|
||
case '8': /* DECRC -- Restore Cursor */
|
||
tcursor(CURSOR_LOAD);
|
||
break;
|
||
case '\\': /* ST -- String Terminator */
|
||
if (term.esc & ESC_STR_END)
|
||
strhandle();
|
||
break;
|
||
default:
|
||
fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
|
||
(uchar) ascii, isprint(ascii)? ascii:'.');
|
||
break;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
void
|
||
tputc(Rune u)
|
||
{
|
||
char c[UTF_SIZ];
|
||
int control;
|
||
int width, len;
|
||
Glyph *gp;
|
||
|
||
control = ISCONTROL(u);
|
||
if (u < 127 || !IS_SET(MODE_UTF8)) {
|
||
c[0] = u;
|
||
width = len = 1;
|
||
} else {
|
||
len = utf8encode(u, c);
|
||
if (!control && (width = wcwidth(u)) == -1)
|
||
width = 1;
|
||
}
|
||
|
||
if (IS_SET(MODE_PRINT))
|
||
tprinter(c, len);
|
||
|
||
/*
|
||
* STR sequence must be checked before anything else
|
||
* because it uses all following characters until it
|
||
* receives a ESC, a SUB, a ST or any other C1 control
|
||
* character.
|
||
*/
|
||
if (term.esc & ESC_STR) {
|
||
if (u == '\a' || u == 030 || u == 032 || u == 033 ||
|
||
ISCONTROLC1(u)) {
|
||
term.esc &= ~(ESC_START|ESC_STR);
|
||
term.esc |= ESC_STR_END;
|
||
goto check_control_code;
|
||
}
|
||
|
||
if (strescseq.len+len >= strescseq.siz) {
|
||
/*
|
||
* Here is a bug in terminals. If the user never sends
|
||
* some code to stop the str or esc command, then st
|
||
* will stop responding. But this is better than
|
||
* silently failing with unknown characters. At least
|
||
* then users will report back.
|
||
*
|
||
* In the case users ever get fixed, here is the code:
|
||
*/
|
||
/*
|
||
* term.esc = 0;
|
||
* strhandle();
|
||
*/
|
||
if (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2)
|
||
return;
|
||
strescseq.siz *= 2;
|
||
strescseq.buf = xrealloc(strescseq.buf, strescseq.siz);
|
||
}
|
||
|
||
memmove(&strescseq.buf[strescseq.len], c, len);
|
||
strescseq.len += len;
|
||
return;
|
||
}
|
||
|
||
check_control_code:
|
||
/*
|
||
* Actions of control codes must be performed as soon they arrive
|
||
* because they can be embedded inside a control sequence, and
|
||
* they must not cause conflicts with sequences.
|
||
*/
|
||
if (control) {
|
||
tcontrolcode(u);
|
||
/*
|
||
* control codes are not shown ever
|
||
*/
|
||
if (!term.esc)
|
||
term.lastc = 0;
|
||
return;
|
||
} else if (term.esc & ESC_START) {
|
||
if (term.esc & ESC_CSI) {
|
||
csiescseq.buf[csiescseq.len++] = u;
|
||
if (BETWEEN(u, 0x40, 0x7E)
|
||
|| csiescseq.len >= \
|
||
sizeof(csiescseq.buf)-1) {
|
||
term.esc = 0;
|
||
csiparse();
|
||
csihandle();
|
||
}
|
||
return;
|
||
} else if (term.esc & ESC_UTF8) {
|
||
tdefutf8(u);
|
||
} else if (term.esc & ESC_ALTCHARSET) {
|
||
tdeftran(u);
|
||
} else if (term.esc & ESC_TEST) {
|
||
tdectest(u);
|
||
} else {
|
||
if (!eschandle(u))
|
||
return;
|
||
/* sequence already finished */
|
||
}
|
||
term.esc = 0;
|
||
/*
|
||
* All characters which form part of a sequence are not
|
||
* printed
|
||
*/
|
||
return;
|
||
}
|
||
/* selected() takes relative coordinates */
|
||
if (selected(term.c.x + term.scr, term.c.y + term.scr))
|
||
selclear();
|
||
|
||
gp = &term.line[term.c.y][term.c.x];
|
||
if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
|
||
gp->mode |= ATTR_WRAP;
|
||
tnewline(1);
|
||
gp = &term.line[term.c.y][term.c.x];
|
||
}
|
||
|
||
if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
|
||
memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
|
||
|
||
if (term.c.x+width > term.col) {
|
||
tnewline(1);
|
||
gp = &term.line[term.c.y][term.c.x];
|
||
}
|
||
|
||
tsetchar(u, &term.c.attr, term.c.x, term.c.y);
|
||
term.lastc = u;
|
||
|
||
if (width == 2) {
|
||
gp->mode |= ATTR_WIDE;
|
||
if (term.c.x+1 < term.col) {
|
||
if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) {
|
||
gp[2].u = ' ';
|
||
gp[2].mode &= ~ATTR_WDUMMY;
|
||
}
|
||
gp[1].u = '\0';
|
||
gp[1].mode = ATTR_WDUMMY;
|
||
}
|
||
}
|
||
if (term.c.x+width < term.col) {
|
||
tmoveto(term.c.x+width, term.c.y);
|
||
} else {
|
||
term.wrapcwidth[IS_SET(MODE_ALTSCREEN)] = width;
|
||
term.c.state |= CURSOR_WRAPNEXT;
|
||
}
|
||
}
|
||
|
||
int
|
||
twrite(const char *buf, int buflen, int show_ctrl)
|
||
{
|
||
int charsize;
|
||
Rune u;
|
||
int n;
|
||
|
||
for (n = 0; n < buflen; n += charsize) {
|
||
if (IS_SET(MODE_UTF8)) {
|
||
/* process a complete utf8 char */
|
||
charsize = utf8decode(buf + n, &u, buflen - n);
|
||
if (charsize == 0)
|
||
break;
|
||
} else {
|
||
u = buf[n] & 0xFF;
|
||
charsize = 1;
|
||
}
|
||
if (show_ctrl && ISCONTROL(u)) {
|
||
if (u & 0x80) {
|
||
u &= 0x7f;
|
||
tputc('^');
|
||
tputc('[');
|
||
} else if (u != '\n' && u != '\r' && u != '\t') {
|
||
u ^= 0x40;
|
||
tputc('^');
|
||
}
|
||
}
|
||
tputc(u);
|
||
}
|
||
return n;
|
||
}
|
||
|
||
void
|
||
treflow(int col, int row)
|
||
{
|
||
int i, j;
|
||
int oce, nce, bot, scr;
|
||
int ox = 0, oy = -term.histf, nx = 0, ny = -1, len;
|
||
int cy = -1; /* proxy for new y coordinate of cursor */
|
||
int nlines;
|
||
Line *buf, line;
|
||
|
||
/* y coordinate of cursor line end */
|
||
for (oce = term.c.y; oce < term.row - 1 &&
|
||
tiswrapped(term.line[oce]); oce++);
|
||
|
||
nlines = term.histf + oce + 1;
|
||
if (col < term.col) {
|
||
/* each line can take this many lines after reflow */
|
||
j = (term.col + col - 1) / col;
|
||
nlines = j * nlines;
|
||
if (nlines > HISTSIZE + RESIZEBUFFER + row) {
|
||
nlines = HISTSIZE + RESIZEBUFFER + row;
|
||
oy = -(nlines / j - oce - 1);
|
||
}
|
||
}
|
||
buf = xmalloc(nlines * sizeof(Line));
|
||
do {
|
||
if (!nx)
|
||
buf[++ny] = xmalloc(col * sizeof(Glyph));
|
||
if (!ox) {
|
||
line = TLINEABS(oy);
|
||
len = tlinelen(line);
|
||
}
|
||
if (oy == term.c.y) {
|
||
if (!ox)
|
||
len = MAX(len, term.c.x + 1);
|
||
/* update cursor */
|
||
if (cy < 0 && term.c.x - ox < col - nx) {
|
||
term.c.x = nx + term.c.x - ox, cy = ny;
|
||
UPDATEWRAPNEXT(0, col);
|
||
}
|
||
}
|
||
/* get reflowed lines in buf */
|
||
if (col - nx > len - ox) {
|
||
memcpy(&buf[ny][nx], &line[ox], (len-ox) * sizeof(Glyph));
|
||
nx += len - ox;
|
||
if (len == 0 || !(line[len - 1].mode & ATTR_WRAP)) {
|
||
for (j = nx; j < col; j++)
|
||
tclearglyph(&buf[ny][j], 0);
|
||
nx = 0;
|
||
} else if (nx > 0) {
|
||
buf[ny][nx - 1].mode &= ~ATTR_WRAP;
|
||
}
|
||
ox = 0, oy++;
|
||
} else if (col - nx == len - ox) {
|
||
memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph));
|
||
ox = 0, oy++, nx = 0;
|
||
} else/* if (col - nx < len - ox) */ {
|
||
memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph));
|
||
ox += col - nx;
|
||
buf[ny][col - 1].mode |= ATTR_WRAP;
|
||
nx = 0;
|
||
}
|
||
} while (oy <= oce);
|
||
if (nx)
|
||
for (j = nx; j < col; j++)
|
||
tclearglyph(&buf[ny][j], 0);
|
||
|
||
/* free extra lines */
|
||
for (i = row; i < term.row; i++)
|
||
free(term.line[i]);
|
||
/* resize to new height */
|
||
term.line = xrealloc(term.line, row * sizeof(Line));
|
||
|
||
bot = MIN(ny, row - 1);
|
||
scr = MAX(row - term.row, 0);
|
||
/* update y coordinate of cursor line end */
|
||
nce = MIN(oce + scr, bot);
|
||
/* update cursor y coordinate */
|
||
term.c.y = nce - (ny - cy);
|
||
if (term.c.y < 0) {
|
||
j = nce, nce = MIN(nce + -term.c.y, bot);
|
||
term.c.y += nce - j;
|
||
while (term.c.y < 0) {
|
||
free(buf[ny--]);
|
||
term.c.y++;
|
||
}
|
||
}
|
||
/* allocate new rows */
|
||
for (i = row - 1; i > nce; i--) {
|
||
term.line[i] = xmalloc(col * sizeof(Glyph));
|
||
for (j = 0; j < col; j++)
|
||
tclearglyph(&term.line[i][j], 0);
|
||
}
|
||
/* fill visible area */
|
||
for (/*i = nce */; i >= term.row; i--, ny--)
|
||
term.line[i] = buf[ny];
|
||
for (/*i = term.row - 1 */; i >= 0; i--, ny--) {
|
||
free(term.line[i]);
|
||
term.line[i] = buf[ny];
|
||
}
|
||
/* fill lines in history buffer and update term.histf */
|
||
for (/*i = -1 */; ny >= 0 && i >= -HISTSIZE; i--, ny--) {
|
||
j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE;
|
||
free(term.hist[j]);
|
||
term.hist[j] = buf[ny];
|
||
}
|
||
term.histf = -i - 1;
|
||
term.scr = MIN(term.scr, term.histf);
|
||
/* resize rest of the history lines */
|
||
for (/*i = -term.histf - 1 */; i >= -HISTSIZE; i--) {
|
||
j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE;
|
||
term.hist[j] = xrealloc(term.hist[j], col * sizeof(Glyph));
|
||
}
|
||
free(buf);
|
||
}
|
||
|
||
void
|
||
rscrolldown(int n)
|
||
{
|
||
int i;
|
||
Line temp;
|
||
|
||
/* can never be true as of now
|
||
if (IS_SET(MODE_ALTSCREEN))
|
||
return; */
|
||
|
||
if ((n = MIN(n, term.histf)) <= 0)
|
||
return;
|
||
|
||
for (i = term.c.y + n; i >= n; i--) {
|
||
temp = term.line[i];
|
||
term.line[i] = term.line[i-n];
|
||
term.line[i-n] = temp;
|
||
}
|
||
for (/*i = n - 1 */; i >= 0; i--) {
|
||
temp = term.line[i];
|
||
term.line[i] = term.hist[term.histi];
|
||
term.hist[term.histi] = temp;
|
||
term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
|
||
}
|
||
term.c.y += n;
|
||
term.histf -= n;
|
||
if ((i = term.scr - n) >= 0) {
|
||
term.scr = i;
|
||
} else {
|
||
term.scr = 0;
|
||
if (sel.ob.x != -1 && !sel.alt)
|
||
selmove(-i);
|
||
}
|
||
}
|
||
|
||
void
|
||
tresize(int col, int row)
|
||
{
|
||
int *bp;
|
||
|
||
/* col and row are always MAX(_, 1)
|
||
if (col < 1 || row < 1) {
|
||
fprintf(stderr, "tresize: error resizing to %dx%d\n", col, row);
|
||
return;
|
||
} */
|
||
|
||
term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
|
||
term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
|
||
if (col > term.col) {
|
||
bp = term.tabs + term.col;
|
||
memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
|
||
while (--bp > term.tabs && !*bp)
|
||
/* nothing */ ;
|
||
for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
|
||
*bp = 1;
|
||
}
|
||
|
||
if (IS_SET(MODE_ALTSCREEN))
|
||
tresizealt(col, row);
|
||
else
|
||
tresizedef(col, row);
|
||
}
|
||
|
||
void
|
||
tresizedef(int col, int row)
|
||
{
|
||
int i, j;
|
||
|
||
/* return if dimensions haven't changed */
|
||
if (term.col == col && term.row == row) {
|
||
tfulldirt();
|
||
return;
|
||
}
|
||
if (col != term.col) {
|
||
if (!sel.alt)
|
||
selremove();
|
||
treflow(col, row);
|
||
} else {
|
||
/* slide screen up if otherwise cursor would get out of the screen */
|
||
if (term.c.y >= row) {
|
||
tscrollup(0, term.row - 1, term.c.y - row + 1, SCROLL_RESIZE);
|
||
term.c.y = row - 1;
|
||
}
|
||
for (i = row; i < term.row; i++)
|
||
free(term.line[i]);
|
||
|
||
/* resize to new height */
|
||
term.line = xrealloc(term.line, row * sizeof(Line));
|
||
/* allocate any new rows */
|
||
for (i = term.row; i < row; i++) {
|
||
term.line[i] = xmalloc(col * sizeof(Glyph));
|
||
for (j = 0; j < col; j++)
|
||
tclearglyph(&term.line[i][j], 0);
|
||
}
|
||
/* scroll down as much as height has increased */
|
||
rscrolldown(row - term.row);
|
||
}
|
||
/* update terminal size */
|
||
term.col = col, term.row = row;
|
||
/* reset scrolling region */
|
||
term.top = 0, term.bot = row - 1;
|
||
/* dirty all lines */
|
||
tfulldirt();
|
||
}
|
||
|
||
void
|
||
tresizealt(int col, int row)
|
||
{
|
||
int i, j;
|
||
|
||
/* return if dimensions haven't changed */
|
||
if (term.col == col && term.row == row) {
|
||
tfulldirt();
|
||
return;
|
||
}
|
||
if (sel.alt)
|
||
selremove();
|
||
/* slide screen up if otherwise cursor would get out of the screen */
|
||
for (i = 0; i <= term.c.y - row; i++)
|
||
free(term.line[i]);
|
||
if (i > 0) {
|
||
/* ensure that both src and dst are not NULL */
|
||
memmove(term.line, term.line + i, row * sizeof(Line));
|
||
term.c.y = row - 1;
|
||
}
|
||
for (i += row; i < term.row; i++)
|
||
free(term.line[i]);
|
||
/* resize to new height */
|
||
term.line = xrealloc(term.line, row * sizeof(Line));
|
||
/* resize to new width */
|
||
for (i = 0; i < MIN(row, term.row); i++) {
|
||
term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
|
||
for (j = term.col; j < col; j++)
|
||
tclearglyph(&term.line[i][j], 0);
|
||
}
|
||
/* allocate any new rows */
|
||
for (/*i = MIN(row, term.row) */; i < row; i++) {
|
||
term.line[i] = xmalloc(col * sizeof(Glyph));
|
||
for (j = 0; j < col; j++)
|
||
tclearglyph(&term.line[i][j], 0);
|
||
}
|
||
/* update cursor */
|
||
if (term.c.x >= col) {
|
||
term.c.state &= ~CURSOR_WRAPNEXT;
|
||
term.c.x = col - 1;
|
||
} else {
|
||
UPDATEWRAPNEXT(1, col);
|
||
}
|
||
/* update terminal size */
|
||
term.col = col, term.row = row;
|
||
/* reset scrolling region */
|
||
term.top = 0, term.bot = row - 1;
|
||
/* dirty all lines */
|
||
tfulldirt();
|
||
}
|
||
|
||
void
|
||
resettitle(void)
|
||
{
|
||
xsettitle(NULL);
|
||
}
|
||
|
||
void
|
||
drawregion(int x1, int y1, int x2, int y2)
|
||
{
|
||
int y;
|
||
|
||
for (y = y1; y < y2; y++) {
|
||
if (!term.dirty[y])
|
||
continue;
|
||
|
||
term.dirty[y] = 0;
|
||
xdrawline(TLINE(y), x1, y, x2);
|
||
}
|
||
}
|
||
|
||
void
|
||
draw(void)
|
||
{
|
||
int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;
|
||
|
||
if (!xstartdraw())
|
||
return;
|
||
|
||
/* adjust cursor position */
|
||
LIMIT(term.ocx, 0, term.col-1);
|
||
LIMIT(term.ocy, 0, term.row-1);
|
||
if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY)
|
||
term.ocx--;
|
||
if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
|
||
cx--;
|
||
|
||
drawregion(0, 0, term.col, term.row);
|
||
xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
|
||
term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
|
||
term.ocx = cx;
|
||
term.ocy = term.c.y;
|
||
xfinishdraw();
|
||
if (ocx != term.ocx || ocy != term.ocy)
|
||
xximspot(term.ocx, term.ocy);
|
||
}
|
||
|
||
void
|
||
redraw(void)
|
||
{
|
||
tfulldirt();
|
||
draw();
|
||
}
|