[u/mdw/putty] / terminal.h

/*
 * Internals of the Terminal structure, for those other modules
 * which need to look inside it. It would be nice if this could be
 * folded back into terminal.c in future, with an abstraction layer
 * to handle everything that other modules need to know about it;
 * but for the moment, this will do.
 */

#ifndef PUTTY_TERMINAL_H
#define PUTTY_TERMINAL_H

#include "tree234.h"

struct beeptime {
    struct beeptime *next;
    unsigned long ticks;
};

typedef struct {
    int y, x;
} pos;

#ifdef OPTIMISE_SCROLL
struct scrollregion {
    struct scrollregion *next;
    int topline; /* Top line of scroll region. */
    int botline; /* Bottom line of scroll region. */
    int lines; /* Number of lines to scroll by - +ve is forwards. */
};
#endif /* OPTIMISE_SCROLL */

typedef struct termchar termchar;
typedef struct termline termline;

struct termchar {
    /*
     * Any code in terminal.c which definitely needs to be changed
     * when extra fields are added here is labelled with a comment
     * saying FULL-TERMCHAR.
     */
    unsigned long chr;
    unsigned long attr;

    /*
     * The cc_next field is used to link multiple termchars
     * together into a list, so as to fit more than one character
     * into a character cell (Unicode combining characters).
     * 
     * cc_next is a relative offset into the current array of
     * termchars. I.e. to advance to the next character in a list,
     * one does `tc += tc->next'.
     * 
     * Zero means end of list.
     */
    int cc_next;
};

struct termline {
    unsigned short lattr;
    int cols;			       /* number of real columns on the line */
    int size;			       /* number of allocated termchars
					* (cc-lists may make this > cols) */
    int temporary;		       /* TRUE if decompressed from scrollback */
    int cc_free;		       /* offset to first cc in free list */
    struct termchar *chars;
};

struct bidi_cache_entry {
    int width;
    struct termchar *chars;
};

struct terminal_tag {

    int compatibility_level;

    tree234 *scrollback;	       /* lines scrolled off top of screen */
    tree234 *screen;		       /* lines on primary screen */
    tree234 *alt_screen;	       /* lines on alternate screen */
    int disptop;		       /* distance scrolled back (0 or -ve) */
    int tempsblines;		       /* number of lines in temporary
					  scrollback */

    termline **disptext;	       /* buffer of text on real screen */
    int dispcursx, dispcursy;	       /* location of cursor on real screen */
    int curstype;		       /* type of cursor on real screen */

#define VBELL_TIMEOUT (TICKSPERSEC/10) /* visual bell lasts 1/10 sec */

    struct beeptime *beephead, *beeptail;
    int nbeeps;
    int beep_overloaded;
    long lastbeep;

#define TTYPE termchar
#define TSIZE (sizeof(TTYPE))

#ifdef OPTIMISE_SCROLL
    struct scrollregion *scrollhead, *scrolltail;
#endif /* OPTIMISE_SCROLL */

    int default_attr, curr_attr, save_attr;
    termchar basic_erase_char, erase_char;

    bufchain inbuf;		       /* terminal input buffer */
    pos curs;			       /* cursor */
    pos savecurs;		       /* saved cursor position */
    int marg_t, marg_b;		       /* scroll margins */
    int dec_om;			       /* DEC origin mode flag */
    int wrap, wrapnext;		       /* wrap flags */
    int insert;			       /* insert-mode flag */
    int cset;			       /* 0 or 1: which char set */
    int save_cset, save_csattr;	       /* saved with cursor position */
    int save_utf, save_wnext;	       /* saved with cursor position */
    int rvideo;			       /* global reverse video flag */
    unsigned long rvbell_startpoint;   /* for ESC[?5hESC[?5l vbell */
    int cursor_on;		       /* cursor enabled flag */
    int reset_132;		       /* Flag ESC c resets to 80 cols */
    int use_bce;		       /* Use Background coloured erase */
    int cblinker;		       /* When blinking is the cursor on ? */
    int tblinker;		       /* When the blinking text is on */
    int blink_is_real;		       /* Actually blink blinking text */
    int term_echoing;		       /* Does terminal want local echo? */
    int term_editing;		       /* Does terminal want local edit? */
    int sco_acs, save_sco_acs;	       /* CSI 10,11,12m -> OEM charset */
    int vt52_bold;		       /* Force bold on non-bold colours */
    int utf;			       /* Are we in toggleable UTF-8 mode? */
    int utf_state;		       /* Is there a pending UTF-8 character */
    int utf_char;		       /* and what is it so far. */
    int utf_size;		       /* The size of the UTF character. */
    int printing, only_printing;       /* Are we doing ANSI printing? */
    int print_state;		       /* state of print-end-sequence scan */
    bufchain printer_buf;	       /* buffered data for printer */
    printer_job *print_job;

    int rows, cols, savelines;
    int has_focus;
    int in_vbell;
    long vbell_end;
    int app_cursor_keys, app_keypad_keys, vt52_mode;
    int repeat_off, cr_lf_return;
    int seen_disp_event;
    int big_cursor;

    int xterm_mouse;		       /* send mouse messages to app */
    int mouse_is_down;		       /* used while tracking mouse buttons */

    int cset_attr[2];

/*
 * Saved settings on the alternate screen.
 */
    int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins;
    int alt_cset, alt_sco_acs, alt_utf;
    int alt_t, alt_b;
    int alt_which;
    int alt_sblines; /* # of lines on alternate screen that should be used for scrollback. */

#define ARGS_MAX 32		       /* max # of esc sequence arguments */
#define ARG_DEFAULT 0		       /* if an arg isn't specified */
#define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
    int esc_args[ARGS_MAX];
    int esc_nargs;
    int esc_query;
#define ANSI(x,y)	((x)+((y)<<8))
#define ANSI_QUE(x)	ANSI(x,TRUE)

#define OSC_STR_MAX 2048
    int osc_strlen;
    char osc_string[OSC_STR_MAX + 1];
    int osc_w;

    char id_string[1024];

    unsigned char *tabs;

    enum {
	TOPLEVEL,
	SEEN_ESC,
	SEEN_CSI,
	SEEN_OSC,
	SEEN_OSC_W,

	DO_CTRLS,

	SEEN_OSC_P,
	OSC_STRING, OSC_MAYBE_ST,
	VT52_ESC,
	VT52_Y1,
	VT52_Y2,
	VT52_FG,
	VT52_BG
    } termstate;

    enum {
	NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
    } selstate;
    enum {
	LEXICOGRAPHIC, RECTANGULAR
    } seltype;
    enum {
	SM_CHAR, SM_WORD, SM_LINE
    } selmode;
    pos selstart, selend, selanchor;

    short wordness[256];

    /* Mask of attributes to pay attention to when painting. */
    int attr_mask;

    wchar_t *paste_buffer;
    int paste_len, paste_pos, paste_hold;
    long last_paste;

    void (*resize_fn)(void *, int, int);
    void *resize_ctx;

    void *ldisc;

    void *frontend;

    void *logctx;

    struct unicode_data *ucsdata;

    /*
     * We maintain a full _copy_ of a Config structure here, not
     * merely a pointer to it. That way, when we're passed a new
     * one for reconfiguration, we can check the differences and
     * adjust the _current_ setting of (e.g.) auto wrap mode rather
     * than only the default.
     */
    Config cfg;

    /*
     * from_backend calls term_out, but it can also be called from
     * the ldisc if the ldisc is called _within_ term_out. So we
     * have to guard against re-entrancy - if from_backend is
     * called recursively like this, it will simply add data to the
     * end of the buffer term_out is in the process of working
     * through.
     */
    int in_term_out;

    /*
     * We schedule a window update shortly after receiving terminal
     * data. This tracks whether one is currently pending.
     */
    int window_update_pending;
    long next_update;

    /*
     * Track pending blinks and tblinks.
     */
    int tblink_pending, cblink_pending;
    long next_tblink, next_cblink;

    /*
     * These are buffers used by the bidi and Arabic shaping code.
     */
    termchar *ltemp;
    int ltemp_size;
    bidi_char *wcFrom, *wcTo;
    int wcFromTo_size;
    struct bidi_cache_entry *pre_bidi_cache, *post_bidi_cache;
    int bidi_cache_size;
};

#define in_utf(term) ((term)->utf || (term)->ucsdata->line_codepage==CP_UTF8)

#endif
Commit	Line	Data
2df34b43	1	/*
	2	* Internals of the Terminal structure, for those other modules
	3	* which need to look inside it. It would be nice if this could be
	4	* folded back into terminal.c in future, with an abstraction layer
	5	* to handle everything that other modules need to know about it;
	6	* but for the moment, this will do.
	7	*/
	8
	9	#ifndef PUTTY_TERMINAL_H
	10	#define PUTTY_TERMINAL_H
	11
	12	#include "tree234.h"
	13
	14	struct beeptime {
	15	struct beeptime *next;
	16	unsigned long ticks;
	17	};
	18
	19	typedef struct {
	20	int y, x;
	21	} pos;
	22
341eb978	23	#ifdef OPTIMISE_SCROLL
	24	struct scrollregion {
	25	struct scrollregion *next;
	26	int topline; /* Top line of scroll region. */
	27	int botline; /* Bottom line of scroll region. */
	28	int lines; /* Number of lines to scroll by - +ve is forwards. */
	29	};
	30	#endif /* OPTIMISE_SCROLL */
	31
36566009	32	typedef struct termchar termchar;
	33	typedef struct termline termline;
	34
	35	struct termchar {
c6958dfe	36	/*
	37	* Any code in terminal.c which definitely needs to be changed
	38	* when extra fields are added here is labelled with a comment
	39	* saying FULL-TERMCHAR.
	40	*/
36566009	41	unsigned long chr;
36566009	42	unsigned long attr;
c6958dfe	43
	44	/*
	45	* The cc_next field is used to link multiple termchars
	46	* together into a list, so as to fit more than one character
	47	* into a character cell (Unicode combining characters).
	48	*
	49	* cc_next is a relative offset into the current array of
	50	* termchars. I.e. to advance to the next character in a list,
	51	* one does `tc += tc->next'.
	52	*
	53	* Zero means end of list.
	54	*/
	55	int cc_next;
36566009	56	};
	57
	58	struct termline {
	59	unsigned short lattr;
c6958dfe	60	int cols; /* number of real columns on the line */
	61	int size; /* number of allocated termchars
	62	* (cc-lists may make this > cols) */
36566009	63	int temporary; /* TRUE if decompressed from scrollback */
c6958dfe	64	int cc_free; /* offset to first cc in free list */
36566009	65	struct termchar *chars;
	66	};
	67
2caf3cd8	68	struct bidi_cache_entry {
	69	int width;
	70	struct termchar *chars;
	71	};
	72
2df34b43	73	struct terminal_tag {
	74
	75	int compatibility_level;
	76
	77	tree234 scrollback; / lines scrolled off top of screen */
	78	tree234 screen; / lines on primary screen */
	79	tree234 alt_screen; / lines on alternate screen */
	80	int disptop; /* distance scrolled back (0 or -ve) */
4683b9b6	81	int tempsblines; /* number of lines in temporary
4683b9b6	82	scrollback */
2df34b43	83
36566009	84	termline *disptext; / buffer of text on real screen */
	85	int dispcursx, dispcursy; /* location of cursor on real screen */
	86	int curstype; /* type of cursor on real screen */
2df34b43	87
	88	#define VBELL_TIMEOUT (TICKSPERSEC/10) /* visual bell lasts 1/10 sec */
	89
	90	struct beeptime beephead, beeptail;
	91	int nbeeps;
	92	int beep_overloaded;
	93	long lastbeep;
	94
36566009	95	#define TTYPE termchar
3d88e64d	96	#define TSIZE (sizeof(TTYPE))
2df34b43	97
341eb978	98	#ifdef OPTIMISE_SCROLL
	99	struct scrollregion scrollhead, scrolltail;
	100	#endif /* OPTIMISE_SCROLL */
	101
36566009	102	int default_attr, curr_attr, save_attr;
36566009	103	termchar basic_erase_char, erase_char;
2df34b43	104
	105	bufchain inbuf; /* terminal input buffer */
	106	pos curs; /* cursor */
	107	pos savecurs; /* saved cursor position */
	108	int marg_t, marg_b; /* scroll margins */
	109	int dec_om; /* DEC origin mode flag */
	110	int wrap, wrapnext; /* wrap flags */
	111	int insert; /* insert-mode flag */
	112	int cset; /* 0 or 1: which char set */
	113	int save_cset, save_csattr; /* saved with cursor position */
	114	int save_utf, save_wnext; /* saved with cursor position */
	115	int rvideo; /* global reverse video flag */
	116	unsigned long rvbell_startpoint; /* for ESC[?5hESC[?5l vbell */
	117	int cursor_on; /* cursor enabled flag */
	118	int reset_132; /* Flag ESC c resets to 80 cols */
	119	int use_bce; /* Use Background coloured erase */
39934deb	120	int cblinker; /* When blinking is the cursor on ? */
2df34b43	121	int tblinker; /* When the blinking text is on */
	122	int blink_is_real; /* Actually blink blinking text */
	123	int term_echoing; /* Does terminal want local echo? */
	124	int term_editing; /* Does terminal want local edit? */
	125	int sco_acs, save_sco_acs; /* CSI 10,11,12m -> OEM charset */
	126	int vt52_bold; /* Force bold on non-bold colours */
	127	int utf; /* Are we in toggleable UTF-8 mode? */
	128	int utf_state; /* Is there a pending UTF-8 character */
	129	int utf_char; /* and what is it so far. */
	130	int utf_size; /* The size of the UTF character. */
	131	int printing, only_printing; /* Are we doing ANSI printing? */
	132	int print_state; /* state of print-end-sequence scan */
	133	bufchain printer_buf; /* buffered data for printer */
	134	printer_job *print_job;
	135
	136	int rows, cols, savelines;
	137	int has_focus;
	138	int in_vbell;
39934deb	139	long vbell_end;
2df34b43	140	int app_cursor_keys, app_keypad_keys, vt52_mode;
	141	int repeat_off, cr_lf_return;
	142	int seen_disp_event;
	143	int big_cursor;
	144
2df34b43	145	int xterm_mouse; /* send mouse messages to app */
b9d7bcad	146	int mouse_is_down; /* used while tracking mouse buttons */
2df34b43	147
36566009	148	int cset_attr[2];
2df34b43	149
	150	/*
	151	* Saved settings on the alternate screen.
	152	*/
	153	int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins;
	154	int alt_cset, alt_sco_acs, alt_utf;
	155	int alt_t, alt_b;
	156	int alt_which;
876e5d5e	157	int alt_sblines; /* # of lines on alternate screen that should be used for scrollback. */
2df34b43	158
	159	#define ARGS_MAX 32 /* max # of esc sequence arguments */
	160	#define ARG_DEFAULT 0 /* if an arg isn't specified */
	161	#define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
	162	int esc_args[ARGS_MAX];
	163	int esc_nargs;
	164	int esc_query;
	165	#define ANSI(x,y) ((x)+((y)<<8))
	166	#define ANSI_QUE(x) ANSI(x,TRUE)
	167
	168	#define OSC_STR_MAX 2048
	169	int osc_strlen;
	170	char osc_string[OSC_STR_MAX + 1];
	171	int osc_w;
	172
	173	char id_string[1024];
	174
	175	unsigned char *tabs;
	176
	177	enum {
	178	TOPLEVEL,
	179	SEEN_ESC,
	180	SEEN_CSI,
	181	SEEN_OSC,
	182	SEEN_OSC_W,
	183
	184	DO_CTRLS,
	185
	186	SEEN_OSC_P,
	187	OSC_STRING, OSC_MAYBE_ST,
	188	VT52_ESC,
	189	VT52_Y1,
	190	VT52_Y2,
	191	VT52_FG,
	192	VT52_BG
	193	} termstate;
	194
	195	enum {
	196	NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
	197	} selstate;
	198	enum {
	199	LEXICOGRAPHIC, RECTANGULAR
	200	} seltype;
	201	enum {
	202	SM_CHAR, SM_WORD, SM_LINE
	203	} selmode;
	204	pos selstart, selend, selanchor;
	205
	206	short wordness[256];
	207
2647b103	208	/* Mask of attributes to pay attention to when painting. */
36566009	209	int attr_mask;
2647b103	210
2df34b43	211	wchar_t *paste_buffer;
	212	int paste_len, paste_pos, paste_hold;
	213	long last_paste;
51470298	214
	215	void (resize_fn)(void , int, int);
	216	void *resize_ctx;
b9d7bcad	217
b9d7bcad	218	void *ldisc;
a8327734	219
	220	void *frontend;
	221
	222	void *logctx;
f6b14226	223
21d2b241	224	struct unicode_data *ucsdata;
21d2b241	225
64734920	226	/*
	227	* We maintain a full _copy_ of a Config structure here, not
	228	* merely a pointer to it. That way, when we're passed a new
	229	* one for reconfiguration, we can check the differences and
	230	* adjust the _current_ setting of (e.g.) auto wrap mode rather
	231	* than only the default.
	232	*/
	233	Config cfg;
74aca06d	234
	235	/*
	236	* from_backend calls term_out, but it can also be called from
	237	* the ldisc if the ldisc is called _within_ term_out. So we
	238	* have to guard against re-entrancy - if from_backend is
	239	* called recursively like this, it will simply add data to the
	240	* end of the buffer term_out is in the process of working
	241	* through.
	242	*/
	243	int in_term_out;
f0fccd51	244
f0fccd51	245	/*
39934deb	246	* We schedule a window update shortly after receiving terminal
	247	* data. This tracks whether one is currently pending.
	248	*/
	249	int window_update_pending;
	250	long next_update;
	251
	252	/*
	253	* Track pending blinks and tblinks.
	254	*/
	255	int tblink_pending, cblink_pending;
	256	long next_tblink, next_cblink;
	257
	258	/*
f0fccd51	259	* These are buffers used by the bidi and Arabic shaping code.
f0fccd51	260	*/
36566009	261	termchar *ltemp;
c6958dfe	262	int ltemp_size;
f0fccd51	263	bidi_char wcFrom, wcTo;
c6958dfe	264	int wcFromTo_size;
2caf3cd8	265	struct bidi_cache_entry pre_bidi_cache, post_bidi_cache;
f0fccd51	266	int bidi_cache_size;
2df34b43	267	};
2df34b43	268
21d2b241	269	#define in_utf(term) ((term)->utf \|\| (term)->ucsdata->line_codepage==CP_UTF8)
2df34b43	270
2df34b43	271	#endif