[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;
    int *forward, *backward;	       /* the permutations of line positions */
};

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 of .scrollback that
					  can be retrieved onto the terminal
					  ("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;

    /* ESC 7 saved state for the alternate screen */
    pos alt_savecurs;
    int alt_save_attr;
    int alt_save_cset, alt_save_csattr;
    int alt_save_utf, alt_save_wnext;
    int alt_save_sco_acs;

    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 host */
    int mouse_is_down;		       /* used while tracking mouse buttons */

    int bracketed_paste;

    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 Conf 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.
     */
    Conf *conf;

    /*
     * 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;

    /*
     * We copy a bunch of stuff out of the Conf structure into local
     * fields in the Terminal structure, to avoid the repeated
     * tree234 lookups which would be involved in fetching them from
     * the former every time.
     */
    int ansi_colour;
    char *answerback;
    int answerbacklen;
    int arabicshaping;
    int beep;
    int bellovl;
    int bellovl_n;
    int bellovl_s;
    int bellovl_t;
    int bidi;
    int bksp_is_delete;
    int blink_cur;
    int blinktext;
    int cjk_ambig_wide;
    int conf_height;
    int conf_width;
    int crhaslf;
    int erase_to_scrollback;
    int funky_type;
    int lfhascr;
    int logflush;
    int logtype;
    int mouse_override;
    int nethack_keypad;
    int no_alt_screen;
    int no_applic_c;
    int no_applic_k;
    int no_dbackspace;
    int no_mouse_rep;
    int no_remote_charset;
    int no_remote_resize;
    int no_remote_wintitle;
    int rawcnp;
    int rect_select;
    int remote_qtitle_action;
    int rxvt_homeend;
    int scroll_on_disp;
    int scroll_on_key;
    int xterm_256_colour;
};

#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;
3c5a620c	71	int forward, backward; /* the permutations of line positions */
2caf3cd8	72	};
2caf3cd8	73
2df34b43	74	struct terminal_tag {
	75
	76	int compatibility_level;
	77
	78	tree234 scrollback; / lines scrolled off top of screen */
	79	tree234 screen; / lines on primary screen */
	80	tree234 alt_screen; / lines on alternate screen */
	81	int disptop; /* distance scrolled back (0 or -ve) */
e6717a98	82	int tempsblines; /* number of lines of .scrollback that
	83	can be retrieved onto the terminal
	84	("temporary scrollback") */
2df34b43	85
36566009	86	termline *disptext; / buffer of text on real screen */
	87	int dispcursx, dispcursy; /* location of cursor on real screen */
	88	int curstype; /* type of cursor on real screen */
2df34b43	89
	90	#define VBELL_TIMEOUT (TICKSPERSEC/10) /* visual bell lasts 1/10 sec */
	91
	92	struct beeptime beephead, beeptail;
	93	int nbeeps;
	94	int beep_overloaded;
	95	long lastbeep;
	96
36566009	97	#define TTYPE termchar
3d88e64d	98	#define TSIZE (sizeof(TTYPE))
2df34b43	99
341eb978	100	#ifdef OPTIMISE_SCROLL
	101	struct scrollregion scrollhead, scrolltail;
	102	#endif /* OPTIMISE_SCROLL */
	103
36566009	104	int default_attr, curr_attr, save_attr;
36566009	105	termchar basic_erase_char, erase_char;
2df34b43	106
	107	bufchain inbuf; /* terminal input buffer */
	108	pos curs; /* cursor */
	109	pos savecurs; /* saved cursor position */
	110	int marg_t, marg_b; /* scroll margins */
	111	int dec_om; /* DEC origin mode flag */
	112	int wrap, wrapnext; /* wrap flags */
	113	int insert; /* insert-mode flag */
	114	int cset; /* 0 or 1: which char set */
	115	int save_cset, save_csattr; /* saved with cursor position */
	116	int save_utf, save_wnext; /* saved with cursor position */
	117	int rvideo; /* global reverse video flag */
	118	unsigned long rvbell_startpoint; /* for ESC[?5hESC[?5l vbell */
	119	int cursor_on; /* cursor enabled flag */
	120	int reset_132; /* Flag ESC c resets to 80 cols */
	121	int use_bce; /* Use Background coloured erase */
39934deb	122	int cblinker; /* When blinking is the cursor on ? */
2df34b43	123	int tblinker; /* When the blinking text is on */
	124	int blink_is_real; /* Actually blink blinking text */
	125	int term_echoing; /* Does terminal want local echo? */
	126	int term_editing; /* Does terminal want local edit? */
	127	int sco_acs, save_sco_acs; /* CSI 10,11,12m -> OEM charset */
	128	int vt52_bold; /* Force bold on non-bold colours */
	129	int utf; /* Are we in toggleable UTF-8 mode? */
	130	int utf_state; /* Is there a pending UTF-8 character */
	131	int utf_char; /* and what is it so far. */
	132	int utf_size; /* The size of the UTF character. */
	133	int printing, only_printing; /* Are we doing ANSI printing? */
	134	int print_state; /* state of print-end-sequence scan */
	135	bufchain printer_buf; /* buffered data for printer */
	136	printer_job *print_job;
	137
fc9748e2	138	/* ESC 7 saved state for the alternate screen */
	139	pos alt_savecurs;
	140	int alt_save_attr;
	141	int alt_save_cset, alt_save_csattr;
	142	int alt_save_utf, alt_save_wnext;
	143	int alt_save_sco_acs;
	144
2df34b43	145	int rows, cols, savelines;
	146	int has_focus;
	147	int in_vbell;
39934deb	148	long vbell_end;
2df34b43	149	int app_cursor_keys, app_keypad_keys, vt52_mode;
	150	int repeat_off, cr_lf_return;
	151	int seen_disp_event;
	152	int big_cursor;
	153
0fab0315	154	int xterm_mouse; /* send mouse messages to host */
b9d7bcad	155	int mouse_is_down; /* used while tracking mouse buttons */
2df34b43	156
61cc757f	157	int bracketed_paste;
61cc757f	158
36566009	159	int cset_attr[2];
2df34b43	160
	161	/*
	162	* Saved settings on the alternate screen.
	163	*/
	164	int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins;
	165	int alt_cset, alt_sco_acs, alt_utf;
	166	int alt_t, alt_b;
	167	int alt_which;
876e5d5e	168	int alt_sblines; /* # of lines on alternate screen that should be used for scrollback. */
2df34b43	169
	170	#define ARGS_MAX 32 /* max # of esc sequence arguments */
	171	#define ARG_DEFAULT 0 /* if an arg isn't specified */
	172	#define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
	173	int esc_args[ARGS_MAX];
	174	int esc_nargs;
	175	int esc_query;
	176	#define ANSI(x,y) ((x)+((y)<<8))
	177	#define ANSI_QUE(x) ANSI(x,TRUE)
	178
	179	#define OSC_STR_MAX 2048
	180	int osc_strlen;
	181	char osc_string[OSC_STR_MAX + 1];
	182	int osc_w;
	183
	184	char id_string[1024];
	185
	186	unsigned char *tabs;
	187
	188	enum {
	189	TOPLEVEL,
	190	SEEN_ESC,
	191	SEEN_CSI,
	192	SEEN_OSC,
	193	SEEN_OSC_W,
	194
	195	DO_CTRLS,
	196
	197	SEEN_OSC_P,
	198	OSC_STRING, OSC_MAYBE_ST,
	199	VT52_ESC,
	200	VT52_Y1,
	201	VT52_Y2,
	202	VT52_FG,
	203	VT52_BG
	204	} termstate;
	205
	206	enum {
	207	NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
	208	} selstate;
	209	enum {
	210	LEXICOGRAPHIC, RECTANGULAR
	211	} seltype;
	212	enum {
	213	SM_CHAR, SM_WORD, SM_LINE
	214	} selmode;
	215	pos selstart, selend, selanchor;
	216
	217	short wordness[256];
	218
2647b103	219	/* Mask of attributes to pay attention to when painting. */
36566009	220	int attr_mask;
2647b103	221
2df34b43	222	wchar_t *paste_buffer;
	223	int paste_len, paste_pos, paste_hold;
	224	long last_paste;
51470298	225
	226	void (resize_fn)(void , int, int);
	227	void *resize_ctx;
b9d7bcad	228
b9d7bcad	229	void *ldisc;
a8327734	230
	231	void *frontend;
	232
	233	void *logctx;
f6b14226	234
21d2b241	235	struct unicode_data *ucsdata;
21d2b241	236
64734920	237	/*
4a693cfc	238	* We maintain a full copy of a Conf here, not merely a pointer
	239	* to it. That way, when we're passed a new one for
	240	* reconfiguration, we can check the differences and adjust the
	241	* _current_ setting of (e.g.) auto wrap mode rather than only
	242	* the default.
64734920	243	*/
4a693cfc	244	Conf *conf;
74aca06d	245
	246	/*
	247	* from_backend calls term_out, but it can also be called from
	248	* the ldisc if the ldisc is called _within_ term_out. So we
	249	* have to guard against re-entrancy - if from_backend is
	250	* called recursively like this, it will simply add data to the
	251	* end of the buffer term_out is in the process of working
	252	* through.
	253	*/
	254	int in_term_out;
f0fccd51	255
f0fccd51	256	/*
39934deb	257	* We schedule a window update shortly after receiving terminal
	258	* data. This tracks whether one is currently pending.
	259	*/
	260	int window_update_pending;
	261	long next_update;
	262
	263	/*
	264	* Track pending blinks and tblinks.
	265	*/
	266	int tblink_pending, cblink_pending;
	267	long next_tblink, next_cblink;
	268
	269	/*
f0fccd51	270	* These are buffers used by the bidi and Arabic shaping code.
f0fccd51	271	*/
36566009	272	termchar *ltemp;
c6958dfe	273	int ltemp_size;
f0fccd51	274	bidi_char wcFrom, wcTo;
c6958dfe	275	int wcFromTo_size;
2caf3cd8	276	struct bidi_cache_entry pre_bidi_cache, post_bidi_cache;
f0fccd51	277	int bidi_cache_size;
4a693cfc	278
	279	/*
	280	* We copy a bunch of stuff out of the Conf structure into local
	281	* fields in the Terminal structure, to avoid the repeated
	282	* tree234 lookups which would be involved in fetching them from
	283	* the former every time.
	284	*/
	285	int ansi_colour;
	286	char *answerback;
	287	int answerbacklen;
	288	int arabicshaping;
	289	int beep;
	290	int bellovl;
	291	int bellovl_n;
	292	int bellovl_s;
	293	int bellovl_t;
	294	int bidi;
	295	int bksp_is_delete;
	296	int blink_cur;
	297	int blinktext;
	298	int cjk_ambig_wide;
	299	int conf_height;
	300	int conf_width;
	301	int crhaslf;
	302	int erase_to_scrollback;
	303	int funky_type;
	304	int lfhascr;
	305	int logflush;
	306	int logtype;
	307	int mouse_override;
	308	int nethack_keypad;
	309	int no_alt_screen;
	310	int no_applic_c;
	311	int no_applic_k;
	312	int no_dbackspace;
	313	int no_mouse_rep;
	314	int no_remote_charset;
	315	int no_remote_resize;
	316	int no_remote_wintitle;
	317	int rawcnp;
	318	int rect_select;
	319	int remote_qtitle_action;
	320	int rxvt_homeend;
	321	int scroll_on_disp;
	322	int scroll_on_key;
	323	int xterm_256_colour;
2df34b43	324	};
2df34b43	325
21d2b241	326	#define in_utf(term) ((term)->utf \|\| (term)->ucsdata->line_codepage==CP_UTF8)
2df34b43	327
2df34b43	328	#endif