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Fix the line-resizing bug in scroll(). (Thanks to RDB for pointing
[u/mdw/putty] / terminal.c
1 #include <windows.h>
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <ctype.h>
6
7 #include <time.h>
8 #include <assert.h>
9 #include "putty.h"
10 #include "tree234.h"
11
12 #define VT52_PLUS
13
14 #define CL_ANSIMIN 0x0001 /* Codes in all ANSI like terminals. */
15 #define CL_VT100 0x0002 /* VT100 */
16 #define CL_VT100AVO 0x0004 /* VT100 +AVO; 132x24 (not 132x14) & attrs */
17 #define CL_VT102 0x0008 /* VT102 */
18 #define CL_VT220 0x0010 /* VT220 */
19 #define CL_VT320 0x0020 /* VT320 */
20 #define CL_VT420 0x0040 /* VT420 */
21 #define CL_VT510 0x0080 /* VT510, NB VT510 includes ANSI */
22 #define CL_VT340TEXT 0x0100 /* VT340 extensions that appear in the VT420 */
23 #define CL_SCOANSI 0x1000 /* SCOANSI not in ANSIMIN. */
24 #define CL_ANSI 0x2000 /* ANSI ECMA-48 not in the VT100..VT420 */
25 #define CL_OTHER 0x4000 /* Others, Xterm, linux, putty, dunno, etc */
26
27 #define TM_VT100 (CL_ANSIMIN|CL_VT100)
28 #define TM_VT100AVO (TM_VT100|CL_VT100AVO)
29 #define TM_VT102 (TM_VT100AVO|CL_VT102)
30 #define TM_VT220 (TM_VT102|CL_VT220)
31 #define TM_VTXXX (TM_VT220|CL_VT340TEXT|CL_VT510|CL_VT420|CL_VT320)
32 #define TM_SCOANSI (CL_ANSIMIN|CL_SCOANSI)
33
34 #define TM_PUTTY (0xFFFF)
35
36 #define compatibility(x) \
37 if ( ((CL_##x)&compatibility_level) == 0 ) { \
38 termstate=TOPLEVEL; \
39 break; \
40 }
41 #define compatibility2(x,y) \
42 if ( ((CL_##x|CL_##y)&compatibility_level) == 0 ) { \
43 termstate=TOPLEVEL; \
44 break; \
45 }
46
47 #define has_compat(x) ( ((CL_##x)&compatibility_level) != 0 )
48
49 static int compatibility_level = TM_PUTTY;
50
51 static tree234 *scrollback; /* lines scrolled off top of screen */
52 static tree234 *screen; /* lines on primary screen */
53 static tree234 *alt_screen; /* lines on alternate screen */
54 static int disptop; /* distance scrolled back (0 or -ve) */
55
56 static unsigned long *cpos; /* cursor position (convenience) */
57
58 static unsigned long *disptext; /* buffer of text on real screen */
59 static unsigned long *dispcurs; /* location of cursor on real screen */
60 static unsigned long curstype; /* type of cursor on real screen */
61
62 #define VBELL_TIMEOUT 100 /* millisecond len of visual bell */
63
64 struct beeptime {
65 struct beeptime *next;
66 long ticks;
67 };
68 static struct beeptime *beephead, *beeptail;
69 int nbeeps;
70 int beep_overloaded;
71 long lastbeep;
72
73 #define TSIZE (sizeof(unsigned long))
74 #define fix_cpos do { cpos = lineptr(curs.y) + curs.x; } while(0)
75
76 static unsigned long curr_attr, save_attr;
77 static unsigned long erase_char = ERASE_CHAR;
78
79 typedef struct {
80 int y, x;
81 } pos;
82 #define poslt(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x < (p2).x ) )
83 #define posle(p1,p2) ( (p1).y < (p2).y || ( (p1).y == (p2).y && (p1).x <= (p2).x ) )
84 #define poseq(p1,p2) ( (p1).y == (p2).y && (p1).x == (p2).x )
85 #define posdiff(p1,p2) ( ((p1).y - (p2).y) * (cols+1) + (p1).x - (p2).x )
86 #define incpos(p) ( (p).x == cols ? ((p).x = 0, (p).y++, 1) : ((p).x++, 0) )
87 #define decpos(p) ( (p).x == 0 ? ((p).x = cols, (p).y--, 1) : ((p).x--, 0) )
88
89 static pos curs; /* cursor */
90 static pos savecurs; /* saved cursor position */
91 static int marg_t, marg_b; /* scroll margins */
92 static int dec_om; /* DEC origin mode flag */
93 static int wrap, wrapnext; /* wrap flags */
94 static int insert; /* insert-mode flag */
95 static int cset; /* 0 or 1: which char set */
96 static int save_cset, save_csattr; /* saved with cursor position */
97 static int rvideo; /* global reverse video flag */
98 static int rvbell_timeout; /* for ESC[?5hESC[?5l vbell */
99 static int cursor_on; /* cursor enabled flag */
100 static int reset_132; /* Flag ESC c resets to 80 cols */
101 static int use_bce; /* Use Background coloured erase */
102 static int blinker; /* When blinking is the cursor on ? */
103 static int tblinker; /* When the blinking text is on */
104 static int blink_is_real; /* Actually blink blinking text */
105 static int term_echoing; /* Does terminal want local echo? */
106 static int term_editing; /* Does terminal want local edit? */
107 static int vt52_bold; /* Force bold on non-bold colours */
108 static int utf_state; /* Is there a pending UTF-8 character */
109 static int utf_char; /* and what is it so far. */
110 static int utf_size; /* The size of the UTF character. */
111
112 static int xterm_mouse; /* send mouse messages to app */
113
114 static unsigned long cset_attr[2];
115
116 /*
117 * Saved settings on the alternate screen.
118 */
119 static int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins, alt_cset;
120 static int alt_t, alt_b;
121 static int alt_which;
122
123 #define ARGS_MAX 32 /* max # of esc sequence arguments */
124 #define ARG_DEFAULT 0 /* if an arg isn't specified */
125 #define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) )
126 static int esc_args[ARGS_MAX];
127 static int esc_nargs;
128 static int esc_query;
129 #define ANSI(x,y) ((x)+((y)<<8))
130 #define ANSI_QUE(x) ANSI(x,TRUE)
131
132 #define OSC_STR_MAX 2048
133 static int osc_strlen;
134 static char osc_string[OSC_STR_MAX + 1];
135 static int osc_w;
136
137 static char id_string[1024] = "\033[?6c";
138
139 static unsigned char *tabs;
140
141 static enum {
142 TOPLEVEL,
143 SEEN_ESC,
144 SEEN_CSI,
145 SEEN_OSC,
146 SEEN_OSC_W,
147
148 DO_CTRLS,
149
150 SEEN_OSC_P,
151 OSC_STRING, OSC_MAYBE_ST,
152 VT52_ESC,
153 VT52_Y1,
154 VT52_Y2,
155 VT52_FG,
156 VT52_BG
157 } termstate;
158
159 static enum {
160 NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED
161 } selstate;
162 static enum {
163 SM_CHAR, SM_WORD, SM_LINE
164 } selmode;
165 static pos selstart, selend, selanchor;
166
167 static short wordness[256] = {
168 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
169 0, 0, 0, 0, 0, 0, 0, 0, /* 01 */
170 0, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
171 2, 2, 1, 1, 1, 1, 1, 1, /* 23 */
172 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
173 2, 2, 2, 1, 1, 1, 1, 2, /* 45 */
174 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
175 2, 2, 2, 1, 1, 1, 1, 1, /* 67 */
176 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
177 1, 1, 1, 1, 1, 1, 1, 1, /* 89 */
178 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
179 1, 1, 1, 1, 1, 1, 1, 1, /* AB */
180 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1,
181 2, 2, 2, 2, 2, 2, 2, 2, /* CD */
182 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1,
183 2, 2, 2, 2, 2, 2, 2, 2, /* EF */
184 };
185
186 #define sel_nl_sz (sizeof(sel_nl)/sizeof(wchar_t))
187 static wchar_t sel_nl[] = SEL_NL;
188 static wchar_t *paste_buffer = 0;
189 static int paste_len, paste_pos, paste_hold;
190
191 /*
192 * Internal prototypes.
193 */
194 static void do_paint(Context, int);
195 static void erase_lots(int, int, int);
196 static void swap_screen(int);
197 static void update_sbar(void);
198 static void deselect(void);
199 /* log session to file stuff ... */
200 static FILE *lgfp = NULL;
201 static void logtraffic(unsigned char c, int logmode);
202
203 /*
204 * Resize a line to make it `cols' columns wide.
205 */
206 unsigned long *resizeline(unsigned long *line, int cols)
207 {
208 int i, oldlen;
209 unsigned long lineattrs;
210
211 if (line[0] != (unsigned long)cols) {
212 /*
213 * This line is the wrong length, which probably means it
214 * hasn't been accessed since a resize. Resize it now.
215 */
216 oldlen = line[0];
217 lineattrs = line[oldlen + 1];
218 line = srealloc(line, TSIZE * (2 + cols));
219 line[0] = cols;
220 for (i = oldlen; i < cols; i++)
221 line[i + 1] = ERASE_CHAR;
222 line[cols + 1] = lineattrs & LATTR_MODE;
223 }
224
225 return line;
226 }
227
228 /*
229 * Retrieve a line of the screen or of the scrollback, according to
230 * whether the y coordinate is non-negative or negative
231 * (respectively).
232 */
233 unsigned long *lineptr(int y, int lineno)
234 {
235 unsigned long *line, *newline;
236 tree234 *whichtree;
237 int treeindex;
238
239 if (y >= 0) {
240 whichtree = screen;
241 treeindex = y;
242 } else {
243 whichtree = scrollback;
244 treeindex = y + count234(scrollback);
245 }
246 line = index234(whichtree, treeindex);
247
248 /* We assume that we don't screw up and retrieve something out of range. */
249 assert(line != NULL);
250
251 newline = resizeline(line, cols);
252 if (newline != line) {
253 delpos234(whichtree, treeindex);
254 addpos234(whichtree, newline, treeindex);
255 }
256
257 return line + 1;
258 }
259
260 #define lineptr(x) lineptr(x,__LINE__)
261 /*
262 * Set up power-on settings for the terminal.
263 */
264 static void power_on(void)
265 {
266 curs.x = curs.y = alt_x = alt_y = savecurs.x = savecurs.y = 0;
267 alt_t = marg_t = 0;
268 if (rows != -1)
269 alt_b = marg_b = rows - 1;
270 else
271 alt_b = marg_b = 0;
272 if (cols != -1) {
273 int i;
274 for (i = 0; i < cols; i++)
275 tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
276 }
277 alt_om = dec_om = cfg.dec_om;
278 alt_wnext = wrapnext = alt_ins = insert = FALSE;
279 alt_wrap = wrap = cfg.wrap_mode;
280 alt_cset = cset = 0;
281 cset_attr[0] = cset_attr[1] = ATTR_ASCII;
282 rvideo = 0;
283 in_vbell = FALSE;
284 cursor_on = 1;
285 big_cursor = 0;
286 save_attr = curr_attr = ATTR_DEFAULT;
287 term_editing = term_echoing = FALSE;
288 ldisc_send(NULL, 0); /* cause ldisc to notice changes */
289 app_cursor_keys = cfg.app_cursor;
290 app_keypad_keys = cfg.app_keypad;
291 use_bce = cfg.bce;
292 blink_is_real = cfg.blinktext;
293 erase_char = ERASE_CHAR;
294 alt_which = 0;
295 {
296 int i;
297 for (i = 0; i < 256; i++)
298 wordness[i] = cfg.wordness[i];
299 }
300 if (screen) {
301 swap_screen(1);
302 erase_lots(FALSE, TRUE, TRUE);
303 swap_screen(0);
304 erase_lots(FALSE, TRUE, TRUE);
305 }
306 }
307
308 /*
309 * Force a screen update.
310 */
311 void term_update(void)
312 {
313 Context ctx;
314 ctx = get_ctx();
315 if (ctx) {
316 if (seen_disp_event)
317 update_sbar();
318 if ((seen_key_event && (cfg.scroll_on_key)) ||
319 (seen_disp_event && (cfg.scroll_on_disp))) {
320 disptop = 0; /* return to main screen */
321 seen_disp_event = seen_key_event = 0;
322 }
323 do_paint(ctx, TRUE);
324 sys_cursor(curs.x, curs.y - disptop);
325 free_ctx(ctx);
326 }
327 }
328
329 /*
330 * Same as power_on(), but an external function.
331 */
332 void term_pwron(void)
333 {
334 power_on();
335 fix_cpos;
336 disptop = 0;
337 deselect();
338 term_update();
339 }
340
341 /*
342 * Clear the scrollback.
343 */
344 void term_clrsb(void)
345 {
346 unsigned long *line;
347 disptop = 0;
348 while ((line = delpos234(scrollback, 0)) != NULL) {
349 sfree(line);
350 }
351 update_sbar();
352 }
353
354 /*
355 * Initialise the terminal.
356 */
357 void term_init(void)
358 {
359 screen = alt_screen = scrollback = NULL;
360 disptop = 0;
361 disptext = dispcurs = NULL;
362 tabs = NULL;
363 deselect();
364 rows = cols = -1;
365 power_on();
366 beephead = beeptail = NULL;
367 nbeeps = 0;
368 lastbeep = FALSE;
369 beep_overloaded = FALSE;
370 }
371
372 /*
373 * Set up the terminal for a given size.
374 */
375 void term_size(int newrows, int newcols, int newsavelines)
376 {
377 tree234 *newalt;
378 unsigned long *newdisp, *line;
379 int i, j;
380 int sblen;
381 int save_alt_which = alt_which;
382
383 if (newrows == rows && newcols == cols && newsavelines == savelines)
384 return; /* nothing to do */
385
386 deselect();
387 swap_screen(0);
388
389 alt_t = marg_t = 0;
390 alt_b = marg_b = newrows - 1;
391
392 if (rows == -1) {
393 scrollback = newtree234(NULL);
394 screen = newtree234(NULL);
395 rows = 0;
396 }
397
398 /*
399 * Resize the screen and scrollback. We only need to shift
400 * lines around within our data structures, because lineptr()
401 * will take care of resizing each individual line if
402 * necessary. So:
403 *
404 * - If the new screen and the old screen differ in length, we
405 * must shunt some lines in from the scrollback or out to
406 * the scrollback.
407 *
408 * - If doing that fails to provide us with enough material to
409 * fill the new screen (i.e. the number of rows needed in
410 * the new screen exceeds the total number in the previous
411 * screen+scrollback), we must invent some blank lines to
412 * cover the gap.
413 *
414 * - Then, if the new scrollback length is less than the
415 * amount of scrollback we actually have, we must throw some
416 * away.
417 */
418 sblen = count234(scrollback);
419 /* Do this loop to expand the screen if newrows > rows */
420 for (i = rows; i < newrows; i++) {
421 if (sblen > 0) {
422 line = delpos234(scrollback, --sblen);
423 } else {
424 line = smalloc(TSIZE * (newcols + 2));
425 line[0] = newcols;
426 for (j = 0; j <= newcols; j++)
427 line[j + 1] = ERASE_CHAR;
428 }
429 addpos234(screen, line, 0);
430 }
431 /* Do this loop to shrink the screen if newrows < rows */
432 for (i = newrows; i < rows; i++) {
433 line = delpos234(screen, 0);
434 addpos234(scrollback, line, sblen++);
435 }
436 assert(count234(screen) == newrows);
437 while (sblen > newsavelines) {
438 line = delpos234(scrollback, 0);
439 sfree(line);
440 sblen--;
441 }
442 assert(count234(scrollback) <= newsavelines);
443 disptop = 0;
444
445 newdisp = smalloc(newrows * (newcols + 1) * TSIZE);
446 for (i = 0; i < newrows * (newcols + 1); i++)
447 newdisp[i] = ATTR_INVALID;
448 sfree(disptext);
449 disptext = newdisp;
450 dispcurs = NULL;
451
452 newalt = newtree234(NULL);
453 for (i = 0; i < newrows; i++) {
454 line = smalloc(TSIZE * (newcols + 2));
455 line[0] = newcols;
456 for (j = 0; j <= newcols; j++)
457 line[j + 1] = erase_char;
458 addpos234(newalt, line, i);
459 }
460 if (alt_screen) {
461 while (NULL != (line = delpos234(alt_screen, 0)))
462 sfree(line);
463 freetree234(alt_screen);
464 }
465 alt_screen = newalt;
466
467 tabs = srealloc(tabs, newcols * sizeof(*tabs));
468 {
469 int i;
470 for (i = (cols > 0 ? cols : 0); i < newcols; i++)
471 tabs[i] = (i % 8 == 0 ? TRUE : FALSE);
472 }
473
474 if (rows > 0)
475 curs.y += newrows - rows;
476 if (curs.y < 0)
477 curs.y = 0;
478 if (curs.y >= newrows)
479 curs.y = newrows - 1;
480 if (curs.x >= newcols)
481 curs.x = newcols - 1;
482 alt_x = alt_y = 0;
483 wrapnext = alt_wnext = FALSE;
484
485 rows = newrows;
486 cols = newcols;
487 savelines = newsavelines;
488 fix_cpos;
489
490 swap_screen(save_alt_which);
491
492 update_sbar();
493 term_update();
494 }
495
496 /*
497 * Swap screens.
498 */
499 static void swap_screen(int which)
500 {
501 int t;
502 tree234 *ttr;
503
504 if (which == alt_which)
505 return;
506
507 alt_which = which;
508
509 ttr = alt_screen;
510 alt_screen = screen;
511 screen = ttr;
512 t = curs.x;
513 curs.x = alt_x;
514 alt_x = t;
515 t = curs.y;
516 curs.y = alt_y;
517 alt_y = t;
518 t = marg_t;
519 marg_t = alt_t;
520 alt_t = t;
521 t = marg_b;
522 marg_b = alt_b;
523 alt_b = t;
524 t = dec_om;
525 dec_om = alt_om;
526 alt_om = t;
527 t = wrap;
528 wrap = alt_wrap;
529 alt_wrap = t;
530 t = wrapnext;
531 wrapnext = alt_wnext;
532 alt_wnext = t;
533 t = insert;
534 insert = alt_ins;
535 alt_ins = t;
536 t = cset;
537 cset = alt_cset;
538 alt_cset = t;
539
540 fix_cpos;
541 }
542
543 /*
544 * Update the scroll bar.
545 */
546 static void update_sbar(void)
547 {
548 int nscroll;
549
550 nscroll = count234(scrollback);
551
552 set_sbar(nscroll + rows, nscroll + disptop, rows);
553 }
554
555 /*
556 * Check whether the region bounded by the two pointers intersects
557 * the scroll region, and de-select the on-screen selection if so.
558 */
559 static void check_selection(pos from, pos to)
560 {
561 if (poslt(from, selend) && poslt(selstart, to))
562 deselect();
563 }
564
565 /*
566 * Scroll the screen. (`lines' is +ve for scrolling forward, -ve
567 * for backward.) `sb' is TRUE if the scrolling is permitted to
568 * affect the scrollback buffer.
569 *
570 * NB this function invalidates all pointers into lines of the
571 * screen data structures. In particular, you MUST call fix_cpos
572 * after calling scroll() and before doing anything else that
573 * uses the cpos shortcut pointer.
574 */
575 static void scroll(int topline, int botline, int lines, int sb)
576 {
577 unsigned long *line, *line2;
578 int i;
579
580 if (topline != 0 || alt_which != 0)
581 sb = FALSE;
582
583 if (lines < 0) {
584 while (lines < 0) {
585 line = delpos234(screen, botline);
586 line = resizeline(line, cols);
587 for (i = 0; i < cols; i++)
588 line[i + 1] = erase_char;
589 line[cols + 1] = 0;
590 addpos234(screen, line, topline);
591
592 if (selstart.y >= topline && selstart.y <= botline) {
593 selstart.y++;
594 if (selstart.y > botline) {
595 selstart.y = botline;
596 selstart.x = 0;
597 }
598 }
599 if (selend.y >= topline && selend.y <= botline) {
600 selend.y++;
601 if (selend.y > botline) {
602 selend.y = botline;
603 selend.x = 0;
604 }
605 }
606
607 lines++;
608 }
609 } else {
610 while (lines > 0) {
611 line = delpos234(screen, topline);
612 if (sb && savelines > 0) {
613 int sblen = count234(scrollback);
614 /*
615 * We must add this line to the scrollback. We'll
616 * remove a line from the top of the scrollback to
617 * replace it, or allocate a new one if the
618 * scrollback isn't full.
619 */
620 if (sblen == savelines) {
621 sblen--, line2 = delpos234(scrollback, 0);
622 } else {
623 line2 = smalloc(TSIZE * (cols + 2));
624 line2[0] = cols;
625 }
626 addpos234(scrollback, line, sblen);
627 line = line2;
628 }
629 line = resizeline(line, cols);
630 for (i = 0; i < cols; i++)
631 line[i + 1] = erase_char;
632 line[cols + 1] = 0;
633 addpos234(screen, line, botline);
634
635 if (selstart.y >= topline && selstart.y <= botline) {
636 selstart.y--;
637 if (selstart.y < topline) {
638 selstart.y = topline;
639 selstart.x = 0;
640 }
641 }
642 if (selend.y >= topline && selend.y <= botline) {
643 selend.y--;
644 if (selend.y < topline) {
645 selend.y = topline;
646 selend.x = 0;
647 }
648 }
649
650 lines--;
651 }
652 }
653 }
654
655 /*
656 * Move the cursor to a given position, clipping at boundaries. We
657 * may or may not want to clip at the scroll margin: marg_clip is 0
658 * not to, 1 to disallow _passing_ the margins, and 2 to disallow
659 * even _being_ outside the margins.
660 */
661 static void move(int x, int y, int marg_clip)
662 {
663 if (x < 0)
664 x = 0;
665 if (x >= cols)
666 x = cols - 1;
667 if (marg_clip) {
668 if ((curs.y >= marg_t || marg_clip == 2) && y < marg_t)
669 y = marg_t;
670 if ((curs.y <= marg_b || marg_clip == 2) && y > marg_b)
671 y = marg_b;
672 }
673 if (y < 0)
674 y = 0;
675 if (y >= rows)
676 y = rows - 1;
677 curs.x = x;
678 curs.y = y;
679 fix_cpos;
680 wrapnext = FALSE;
681 }
682
683 /*
684 * Save or restore the cursor and SGR mode.
685 */
686 static void save_cursor(int save)
687 {
688 if (save) {
689 savecurs = curs;
690 save_attr = curr_attr;
691 save_cset = cset;
692 save_csattr = cset_attr[cset];
693 } else {
694 curs = savecurs;
695 /* Make sure the window hasn't shrunk since the save */
696 if (curs.x >= cols)
697 curs.x = cols - 1;
698 if (curs.y >= rows)
699 curs.y = rows - 1;
700
701 curr_attr = save_attr;
702 cset = save_cset;
703 cset_attr[cset] = save_csattr;
704 fix_cpos;
705 if (use_bce)
706 erase_char = (' ' | (curr_attr & (ATTR_FGMASK | ATTR_BGMASK)));
707 }
708 }
709
710 /*
711 * Erase a large portion of the screen: the whole screen, or the
712 * whole line, or parts thereof.
713 */
714 static void erase_lots(int line_only, int from_begin, int to_end)
715 {
716 pos start, end;
717 int erase_lattr;
718 unsigned long *ldata;
719
720 if (line_only) {
721 start.y = curs.y;
722 start.x = 0;
723 end.y = curs.y + 1;
724 end.x = 0;
725 erase_lattr = FALSE;
726 } else {
727 start.y = 0;
728 start.x = 0;
729 end.y = rows;
730 end.x = 0;
731 erase_lattr = TRUE;
732 }
733 if (!from_begin) {
734 start = curs;
735 }
736 if (!to_end) {
737 end = curs;
738 }
739 check_selection(start, end);
740
741 /* Clear screen also forces a full window redraw, just in case. */
742 if (start.y == 0 && start.x == 0 && end.y == rows)
743 term_invalidate();
744
745 ldata = lineptr(start.y);
746 while (poslt(start, end)) {
747 if (start.y == cols && !erase_lattr)
748 ldata[start.x] &= ~LATTR_WRAPPED;
749 else
750 ldata[start.x] = erase_char;
751 if (incpos(start) && start.y < rows)
752 ldata = lineptr(start.y);
753 }
754 }
755
756 /*
757 * Insert or delete characters within the current line. n is +ve if
758 * insertion is desired, and -ve for deletion.
759 */
760 static void insch(int n)
761 {
762 int dir = (n < 0 ? -1 : +1);
763 int m;
764 pos cursplus;
765 unsigned long *ldata;
766
767 n = (n < 0 ? -n : n);
768 if (n > cols - curs.x)
769 n = cols - curs.x;
770 m = cols - curs.x - n;
771 cursplus.y = curs.y;
772 cursplus.x = curs.x + n;
773 check_selection(curs, cursplus);
774 ldata = lineptr(curs.y);
775 if (dir < 0) {
776 memmove(ldata + curs.x, ldata + curs.x + n, m * TSIZE);
777 while (n--)
778 ldata[curs.x + m++] = erase_char;
779 } else {
780 memmove(ldata + curs.x + n, ldata + curs.x, m * TSIZE);
781 while (n--)
782 ldata[curs.x + n] = erase_char;
783 }
784 }
785
786 /*
787 * Toggle terminal mode `mode' to state `state'. (`query' indicates
788 * whether the mode is a DEC private one or a normal one.)
789 */
790 static void toggle_mode(int mode, int query, int state)
791 {
792 long ticks;
793
794 if (query)
795 switch (mode) {
796 case 1: /* application cursor keys */
797 app_cursor_keys = state;
798 break;
799 case 2: /* VT52 mode */
800 vt52_mode = !state;
801 if (vt52_mode) {
802 blink_is_real = FALSE;
803 vt52_bold = FALSE;
804 } else {
805 blink_is_real = cfg.blinktext;
806 }
807 break;
808 case 3: /* 80/132 columns */
809 deselect();
810 request_resize(state ? 132 : 80, rows, 1);
811 reset_132 = state;
812 break;
813 case 5: /* reverse video */
814 /*
815 * Toggle reverse video. If we receive an OFF within the
816 * visual bell timeout period after an ON, we trigger an
817 * effective visual bell, so that ESC[?5hESC[?5l will
818 * always be an actually _visible_ visual bell.
819 */
820 ticks = GetTickCount();
821 if (rvideo && !state && /* we're turning it off */
822 ticks < rvbell_timeout) { /* and it's not long since it was turned on */
823 in_vbell = TRUE; /* we may clear rvideo but we set in_vbell */
824 if (vbell_timeout < rvbell_timeout) /* don't move vbell end forward */
825 vbell_timeout = rvbell_timeout; /* vbell end is at least then */
826 } else if (!rvideo && state) {
827 /* This is an ON, so we notice the time and save it. */
828 rvbell_timeout = ticks + VBELL_TIMEOUT;
829 }
830 rvideo = state;
831 seen_disp_event = TRUE;
832 if (state)
833 term_update();
834 break;
835 case 6: /* DEC origin mode */
836 dec_om = state;
837 break;
838 case 7: /* auto wrap */
839 wrap = state;
840 break;
841 case 8: /* auto key repeat */
842 repeat_off = !state;
843 break;
844 case 10: /* set local edit mode */
845 term_editing = state;
846 ldisc_send(NULL, 0); /* cause ldisc to notice changes */
847 break;
848 case 25: /* enable/disable cursor */
849 compatibility2(OTHER, VT220);
850 cursor_on = state;
851 seen_disp_event = TRUE;
852 break;
853 case 47: /* alternate screen */
854 compatibility(OTHER);
855 deselect();
856 swap_screen(state);
857 disptop = 0;
858 break;
859 case 1000: /* xterm mouse 1 */
860 xterm_mouse = state ? 1 : 0;
861 set_raw_mouse_mode(state);
862 break;
863 case 1002: /* xterm mouse 2 */
864 xterm_mouse = state ? 2 : 0;
865 set_raw_mouse_mode(state);
866 break;
867 } else
868 switch (mode) {
869 case 4: /* set insert mode */
870 compatibility(VT102);
871 insert = state;
872 break;
873 case 12: /* set echo mode */
874 term_echoing = !state;
875 ldisc_send(NULL, 0); /* cause ldisc to notice changes */
876 break;
877 case 20: /* Return sends ... */
878 cr_lf_return = state;
879 break;
880 case 34: /* Make cursor BIG */
881 compatibility2(OTHER, VT220);
882 big_cursor = !state;
883 }
884 }
885
886 /*
887 * Process an OSC sequence: set window title or icon name.
888 */
889 static void do_osc(void)
890 {
891 if (osc_w) {
892 while (osc_strlen--)
893 wordness[(unsigned char) osc_string[osc_strlen]] = esc_args[0];
894 } else {
895 osc_string[osc_strlen] = '\0';
896 switch (esc_args[0]) {
897 case 0:
898 case 1:
899 set_icon(osc_string);
900 if (esc_args[0] == 1)
901 break;
902 /* fall through: parameter 0 means set both */
903 case 2:
904 case 21:
905 set_title(osc_string);
906 break;
907 }
908 }
909 }
910
911 /*
912 * Remove everything currently in `inbuf' and stick it up on the
913 * in-memory display. There's a big state machine in here to
914 * process escape sequences...
915 */
916 void term_out(void)
917 {
918 int c, inbuf_reap;
919
920 for (inbuf_reap = 0; inbuf_reap < inbuf_head; inbuf_reap++) {
921 c = inbuf[inbuf_reap];
922
923 /*
924 * Optionally log the session traffic to a file. Useful for
925 * debugging and possibly also useful for actual logging.
926 */
927 logtraffic((unsigned char) c, LGTYP_DEBUG);
928
929 /* Note only VT220+ are 8-bit VT102 is seven bit, it shouldn't even
930 * be able to display 8-bit characters, but I'll let that go 'cause
931 * of i18n.
932 */
933
934 /* First see about all those translations. */
935 if (termstate == TOPLEVEL) {
936 if (utf)
937 switch (utf_state) {
938 case 0:
939 if (c < 0x80) {
940 /* I know; gotos are evil. This one is really bad!
941 * But before you try removing it follow the path of the
942 * sequence "0x5F 0xC0 0x71" with UTF and VTGraphics on.
943 */
944 /*
945 if (cfg.no_vt_graph_with_utf8) break;
946 */
947 goto evil_jump;
948 } else if ((c & 0xe0) == 0xc0) {
949 utf_size = utf_state = 1;
950 utf_char = (c & 0x1f);
951 } else if ((c & 0xf0) == 0xe0) {
952 utf_size = utf_state = 2;
953 utf_char = (c & 0x0f);
954 } else if ((c & 0xf8) == 0xf0) {
955 utf_size = utf_state = 3;
956 utf_char = (c & 0x07);
957 } else if ((c & 0xfc) == 0xf8) {
958 utf_size = utf_state = 4;
959 utf_char = (c & 0x03);
960 } else if ((c & 0xfe) == 0xfc) {
961 utf_size = utf_state = 5;
962 utf_char = (c & 0x01);
963 } else {
964 c = UCSERR;
965 break;
966 }
967 continue;
968 case 1:
969 case 2:
970 case 3:
971 case 4:
972 case 5:
973 if ((c & 0xC0) != 0x80) {
974 inbuf_reap--; /* This causes the faulting character */
975 c = UCSERR; /* to be logged twice - not really a */
976 utf_state = 0; /* serious problem. */
977 break;
978 }
979 utf_char = (utf_char << 6) | (c & 0x3f);
980 if (--utf_state)
981 continue;
982
983 c = utf_char;
984
985 /* Is somebody trying to be evil! */
986 if (c < 0x80 ||
987 (c < 0x800 && utf_size >= 2) ||
988 (c < 0x10000 && utf_size >= 3) ||
989 (c < 0x200000 && utf_size >= 4) ||
990 (c < 0x4000000 && utf_size >= 5))
991 c = UCSERR;
992
993 /* Unicode line separator and paragraph separator are CR-LF */
994 if (c == 0x2028 || c == 0x2029)
995 c = 0x85;
996
997 /* High controls are probably a Baaad idea too. */
998 if (c < 0xA0)
999 c = 0xFFFD;
1000
1001 /* The UTF-16 surrogates are not nice either. */
1002 /* The standard give the option of decoding these:
1003 * I don't want to! */
1004 if (c >= 0xD800 && c < 0xE000)
1005 c = UCSERR;
1006
1007 /* ISO 10646 characters now limited to UTF-16 range. */
1008 if (c > 0x10FFFF)
1009 c = UCSERR;
1010
1011 /* This is currently a TagPhobic application.. */
1012 if (c >= 0xE0000 && c <= 0xE007F)
1013 continue;
1014
1015 /* U+FEFF is best seen as a null. */
1016 if (c == 0xFEFF)
1017 continue;
1018 /* But U+FFFE is an error. */
1019 if (c == 0xFFFE || c == 0xFFFF)
1020 c = UCSERR;
1021
1022 /* Oops this is a 16bit implementation */
1023 if (c >= 0x10000)
1024 c = 0xFFFD;
1025 break;
1026 } else {
1027 evil_jump:;
1028 switch (cset_attr[cset]) {
1029 /*
1030 * Linedraw characters are different from 'ESC ( B'
1031 * only for a small range. For ones outside that
1032 * range, make sure we use the same font as well as
1033 * the same encoding.
1034 */
1035 case ATTR_LINEDRW:
1036 if (unitab_ctrl[c] != 0xFF)
1037 c = unitab_ctrl[c];
1038 else
1039 c = ((unsigned char) c) | ATTR_LINEDRW;
1040 break;
1041
1042 case ATTR_GBCHR:
1043 /* If UK-ASCII, make the '#' a LineDraw Pound */
1044 if (c == '#') {
1045 c = '}' | ATTR_LINEDRW;
1046 break;
1047 }
1048 /*FALLTHROUGH*/ case ATTR_ASCII:
1049 if (unitab_ctrl[c] != 0xFF)
1050 c = unitab_ctrl[c];
1051 else
1052 c = ((unsigned char) c) | ATTR_ASCII;
1053 break;
1054 }
1055 }
1056 }
1057
1058 /* How about C1 controls ? */
1059 if ((c & -32) == 0x80 && termstate < DO_CTRLS && !vt52_mode &&
1060 has_compat(VT220)) {
1061 termstate = SEEN_ESC;
1062 esc_query = FALSE;
1063 c = '@' + (c & 0x1F);
1064 }
1065
1066 /* Or the GL control. */
1067 if (c == '\177' && termstate < DO_CTRLS && has_compat(OTHER)) {
1068 if (curs.x && !wrapnext)
1069 curs.x--;
1070 wrapnext = FALSE;
1071 fix_cpos;
1072 *cpos = (' ' | curr_attr | ATTR_ASCII);
1073 } else
1074 /* Or normal C0 controls. */
1075 if ((c & -32) == 0 && termstate < DO_CTRLS) {
1076 switch (c) {
1077 case '\005': /* terminal type query */
1078 /* Strictly speaking this is VT100 but a VT100 defaults to
1079 * no response. Other terminals respond at their option.
1080 *
1081 * Don't put a CR in the default string as this tends to
1082 * upset some weird software.
1083 *
1084 * An xterm returns "xterm" (5 characters)
1085 */
1086 compatibility(ANSIMIN);
1087 {
1088 char abuf[256], *s, *d;
1089 int state = 0;
1090 for (s = cfg.answerback, d = abuf; *s; s++) {
1091 if (state) {
1092 if (*s >= 'a' && *s <= 'z')
1093 *d++ = (*s - ('a' - 1));
1094 else if ((*s >= '@' && *s <= '_') ||
1095 *s == '?' || (*s & 0x80))
1096 *d++ = ('@' ^ *s);
1097 else if (*s == '~')
1098 *d++ = '^';
1099 state = 0;
1100 } else if (*s == '^') {
1101 state = 1;
1102 } else
1103 *d++ = *s;
1104 }
1105 lpage_send(CP_ACP, abuf, d - abuf);
1106 }
1107 break;
1108 case '\007':
1109 {
1110 struct beeptime *newbeep;
1111 long ticks;
1112
1113 ticks = GetTickCount();
1114
1115 if (!beep_overloaded) {
1116 newbeep = smalloc(sizeof(struct beeptime));
1117 newbeep->ticks = ticks;
1118 newbeep->next = NULL;
1119 if (!beephead)
1120 beephead = newbeep;
1121 else
1122 beeptail->next = newbeep;
1123 beeptail = newbeep;
1124 nbeeps++;
1125 }
1126
1127 /*
1128 * Throw out any beeps that happened more than
1129 * t seconds ago.
1130 */
1131 while (beephead &&
1132 beephead->ticks < ticks - cfg.bellovl_t) {
1133 struct beeptime *tmp = beephead;
1134 beephead = tmp->next;
1135 sfree(tmp);
1136 if (!beephead)
1137 beeptail = NULL;
1138 nbeeps--;
1139 }
1140
1141 if (cfg.bellovl && beep_overloaded &&
1142 ticks - lastbeep >= cfg.bellovl_s) {
1143 /*
1144 * If we're currently overloaded and the
1145 * last beep was more than s seconds ago,
1146 * leave overload mode.
1147 */
1148 beep_overloaded = FALSE;
1149 } else if (cfg.bellovl && !beep_overloaded &&
1150 nbeeps >= cfg.bellovl_n) {
1151 /*
1152 * Now, if we have n or more beeps
1153 * remaining in the queue, go into overload
1154 * mode.
1155 */
1156 beep_overloaded = TRUE;
1157 }
1158 lastbeep = ticks;
1159
1160 /*
1161 * Perform an actual beep if we're not overloaded.
1162 */
1163 if (!cfg.bellovl || !beep_overloaded) {
1164 beep(cfg.beep);
1165 if (cfg.beep == BELL_VISUAL) {
1166 in_vbell = TRUE;
1167 vbell_timeout = ticks + VBELL_TIMEOUT;
1168 term_update();
1169 }
1170 }
1171 disptop = 0;
1172 }
1173 break;
1174 case '\b':
1175 if (curs.x == 0 && (curs.y == 0 || wrap == 0));
1176 else if (curs.x == 0 && curs.y > 0)
1177 curs.x = cols - 1, curs.y--;
1178 else if (wrapnext)
1179 wrapnext = FALSE;
1180 else
1181 curs.x--;
1182 fix_cpos;
1183 seen_disp_event = TRUE;
1184 break;
1185 case '\016':
1186 compatibility(VT100);
1187 cset = 1;
1188 break;
1189 case '\017':
1190 compatibility(VT100);
1191 cset = 0;
1192 break;
1193 case '\033':
1194 if (vt52_mode)
1195 termstate = VT52_ESC;
1196 else {
1197 compatibility(ANSIMIN);
1198 termstate = SEEN_ESC;
1199 esc_query = FALSE;
1200 }
1201 break;
1202 case '\r':
1203 curs.x = 0;
1204 wrapnext = FALSE;
1205 fix_cpos;
1206 seen_disp_event = TRUE;
1207 paste_hold = 0;
1208 logtraffic((unsigned char) c, LGTYP_ASCII);
1209 break;
1210 case '\014':
1211 if (has_compat(SCOANSI)) {
1212 move(0, 0, 0);
1213 erase_lots(FALSE, FALSE, TRUE);
1214 disptop = 0;
1215 wrapnext = FALSE;
1216 seen_disp_event = 1;
1217 break;
1218 }
1219 case '\013':
1220 compatibility(VT100);
1221 case '\n':
1222 if (curs.y == marg_b)
1223 scroll(marg_t, marg_b, 1, TRUE);
1224 else if (curs.y < rows - 1)
1225 curs.y++;
1226 if (cfg.lfhascr)
1227 curs.x = 0;
1228 fix_cpos;
1229 wrapnext = FALSE;
1230 seen_disp_event = 1;
1231 paste_hold = 0;
1232 logtraffic((unsigned char) c, LGTYP_ASCII);
1233 break;
1234 case '\t':
1235 {
1236 pos old_curs = curs;
1237 unsigned long *ldata = lineptr(curs.y);
1238
1239 do {
1240 curs.x++;
1241 } while (curs.x < cols - 1 && !tabs[curs.x]);
1242
1243 if ((ldata[cols] & LATTR_MODE) != LATTR_NORM) {
1244 if (curs.x >= cols / 2)
1245 curs.x = cols / 2 - 1;
1246 } else {
1247 if (curs.x >= cols)
1248 curs.x = cols - 1;
1249 }
1250
1251 fix_cpos;
1252 check_selection(old_curs, curs);
1253 }
1254 seen_disp_event = TRUE;
1255 break;
1256 }
1257 } else
1258 switch (termstate) {
1259 case TOPLEVEL:
1260 /* Only graphic characters get this far, ctrls are stripped above */
1261 if (wrapnext && wrap) {
1262 cpos[1] |= LATTR_WRAPPED;
1263 if (curs.y == marg_b)
1264 scroll(marg_t, marg_b, 1, TRUE);
1265 else if (curs.y < rows - 1)
1266 curs.y++;
1267 curs.x = 0;
1268 fix_cpos;
1269 wrapnext = FALSE;
1270 }
1271 if (insert)
1272 insch(1);
1273 if (selstate != NO_SELECTION) {
1274 pos cursplus = curs;
1275 incpos(cursplus);
1276 check_selection(curs, cursplus);
1277 }
1278 if ((c & CSET_MASK) == ATTR_ASCII || (c & CSET_MASK) == 0)
1279 logtraffic((unsigned char) c, LGTYP_ASCII);
1280 {
1281 extern int wcwidth(wchar_t ucs);
1282 int width = 0;
1283 if (DIRECT_CHAR(c))
1284 width = 1;
1285 if (!width)
1286 width = wcwidth((wchar_t) c);
1287 switch (width) {
1288 case 2:
1289 if (curs.x + 1 != cols) {
1290 *cpos++ = c | ATTR_WIDE | curr_attr;
1291 *cpos++ = UCSWIDE | curr_attr;
1292 curs.x++;
1293 break;
1294 }
1295 case 1:
1296 *cpos++ = c | curr_attr;
1297 break;
1298 default:
1299 continue;
1300 }
1301 }
1302 curs.x++;
1303 if (curs.x == cols) {
1304 cpos--;
1305 curs.x--;
1306 wrapnext = TRUE;
1307 if (wrap && vt52_mode) {
1308 cpos[1] |= LATTR_WRAPPED;
1309 if (curs.y == marg_b)
1310 scroll(marg_t, marg_b, 1, TRUE);
1311 else if (curs.y < rows - 1)
1312 curs.y++;
1313 curs.x = 0;
1314 fix_cpos;
1315 wrapnext = FALSE;
1316 }
1317 }
1318 seen_disp_event = 1;
1319 break;
1320
1321 case OSC_MAYBE_ST:
1322 /*
1323 * This state is virtually identical to SEEN_ESC, with the
1324 * exception that we have an OSC sequence in the pipeline,
1325 * and _if_ we see a backslash, we process it.
1326 */
1327 if (c == '\\') {
1328 do_osc();
1329 termstate = TOPLEVEL;
1330 break;
1331 }
1332 /* else fall through */
1333 case SEEN_ESC:
1334 if (c >= ' ' && c <= '/') {
1335 if (esc_query)
1336 esc_query = -1;
1337 else
1338 esc_query = c;
1339 break;
1340 }
1341 termstate = TOPLEVEL;
1342 switch (ANSI(c, esc_query)) {
1343 case '[': /* enter CSI mode */
1344 termstate = SEEN_CSI;
1345 esc_nargs = 1;
1346 esc_args[0] = ARG_DEFAULT;
1347 esc_query = FALSE;
1348 break;
1349 case ']': /* xterm escape sequences */
1350 /* Compatibility is nasty here, xterm, linux, decterm yuk! */
1351 compatibility(OTHER);
1352 termstate = SEEN_OSC;
1353 esc_args[0] = 0;
1354 break;
1355 case '7': /* save cursor */
1356 compatibility(VT100);
1357 save_cursor(TRUE);
1358 break;
1359 case '8': /* restore cursor */
1360 compatibility(VT100);
1361 save_cursor(FALSE);
1362 seen_disp_event = TRUE;
1363 break;
1364 case '=':
1365 compatibility(VT100);
1366 app_keypad_keys = TRUE;
1367 break;
1368 case '>':
1369 compatibility(VT100);
1370 app_keypad_keys = FALSE;
1371 break;
1372 case 'D': /* exactly equivalent to LF */
1373 compatibility(VT100);
1374 if (curs.y == marg_b)
1375 scroll(marg_t, marg_b, 1, TRUE);
1376 else if (curs.y < rows - 1)
1377 curs.y++;
1378 fix_cpos;
1379 wrapnext = FALSE;
1380 seen_disp_event = TRUE;
1381 break;
1382 case 'E': /* exactly equivalent to CR-LF */
1383 compatibility(VT100);
1384 curs.x = 0;
1385 if (curs.y == marg_b)
1386 scroll(marg_t, marg_b, 1, TRUE);
1387 else if (curs.y < rows - 1)
1388 curs.y++;
1389 fix_cpos;
1390 wrapnext = FALSE;
1391 seen_disp_event = TRUE;
1392 break;
1393 case 'M': /* reverse index - backwards LF */
1394 compatibility(VT100);
1395 if (curs.y == marg_t)
1396 scroll(marg_t, marg_b, -1, TRUE);
1397 else if (curs.y > 0)
1398 curs.y--;
1399 fix_cpos;
1400 wrapnext = FALSE;
1401 seen_disp_event = TRUE;
1402 break;
1403 case 'Z': /* terminal type query */
1404 compatibility(VT100);
1405 ldisc_send(id_string, strlen(id_string));
1406 break;
1407 case 'c': /* restore power-on settings */
1408 compatibility(VT100);
1409 power_on();
1410 if (reset_132) {
1411 request_resize(80, rows, 1);
1412 reset_132 = 0;
1413 }
1414 fix_cpos;
1415 disptop = 0;
1416 seen_disp_event = TRUE;
1417 break;
1418 case 'H': /* set a tab */
1419 compatibility(VT100);
1420 tabs[curs.x] = TRUE;
1421 break;
1422
1423 case ANSI('8', '#'): /* ESC # 8 fills screen with Es :-) */
1424 compatibility(VT100);
1425 {
1426 unsigned long *ldata;
1427 int i, j;
1428 pos scrtop, scrbot;
1429
1430 for (i = 0; i < rows; i++) {
1431 ldata = lineptr(i);
1432 for (j = 0; j < cols; j++)
1433 ldata[j] = ATTR_DEFAULT | 'E';
1434 ldata[cols] = 0;
1435 }
1436 disptop = 0;
1437 seen_disp_event = TRUE;
1438 scrtop.x = scrtop.y = 0;
1439 scrbot.x = 0;
1440 scrbot.y = rows;
1441 check_selection(scrtop, scrbot);
1442 }
1443 break;
1444
1445 case ANSI('3', '#'):
1446 case ANSI('4', '#'):
1447 case ANSI('5', '#'):
1448 case ANSI('6', '#'):
1449 compatibility(VT100);
1450 {
1451 unsigned long nlattr;
1452 unsigned long *ldata;
1453 switch (ANSI(c, esc_query)) {
1454 case ANSI('3', '#'):
1455 nlattr = LATTR_TOP;
1456 break;
1457 case ANSI('4', '#'):
1458 nlattr = LATTR_BOT;
1459 break;
1460 case ANSI('5', '#'):
1461 nlattr = LATTR_NORM;
1462 break;
1463 default: /* spiritually case ANSI('6', '#'): */
1464 nlattr = LATTR_WIDE;
1465 break;
1466 }
1467 ldata = lineptr(curs.y);
1468 ldata[cols] &= ~LATTR_MODE;
1469 ldata[cols] |= nlattr;
1470 }
1471 break;
1472
1473 case ANSI('A', '('):
1474 compatibility(VT100);
1475 cset_attr[0] = ATTR_GBCHR;
1476 break;
1477 case ANSI('B', '('):
1478 compatibility(VT100);
1479 cset_attr[0] = ATTR_ASCII;
1480 break;
1481 case ANSI('0', '('):
1482 compatibility(VT100);
1483 cset_attr[0] = ATTR_LINEDRW;
1484 break;
1485
1486 case ANSI('A', ')'):
1487 compatibility(VT100);
1488 cset_attr[1] = ATTR_GBCHR;
1489 break;
1490 case ANSI('B', ')'):
1491 compatibility(VT100);
1492 cset_attr[1] = ATTR_ASCII;
1493 break;
1494 case ANSI('0', ')'):
1495 compatibility(VT100);
1496 cset_attr[1] = ATTR_LINEDRW;
1497 break;
1498
1499 case ANSI('8', '%'): /* Old Linux code */
1500 case ANSI('G', '%'):
1501 compatibility(OTHER);
1502 utf = 1;
1503 break;
1504 case ANSI('@', '%'):
1505 compatibility(OTHER);
1506 if (line_codepage != CP_UTF8)
1507 utf = 0;
1508 break;
1509 }
1510 break;
1511 case SEEN_CSI:
1512 termstate = TOPLEVEL; /* default */
1513 if (isdigit(c)) {
1514 if (esc_nargs <= ARGS_MAX) {
1515 if (esc_args[esc_nargs - 1] == ARG_DEFAULT)
1516 esc_args[esc_nargs - 1] = 0;
1517 esc_args[esc_nargs - 1] =
1518 10 * esc_args[esc_nargs - 1] + c - '0';
1519 }
1520 termstate = SEEN_CSI;
1521 } else if (c == ';') {
1522 if (++esc_nargs <= ARGS_MAX)
1523 esc_args[esc_nargs - 1] = ARG_DEFAULT;
1524 termstate = SEEN_CSI;
1525 } else if (c < '@') {
1526 if (esc_query)
1527 esc_query = -1;
1528 else if (c == '?')
1529 esc_query = TRUE;
1530 else
1531 esc_query = c;
1532 termstate = SEEN_CSI;
1533 } else
1534 switch (ANSI(c, esc_query)) {
1535 case 'A': /* move up N lines */
1536 move(curs.x, curs.y - def(esc_args[0], 1), 1);
1537 seen_disp_event = TRUE;
1538 break;
1539 case 'e': /* move down N lines */
1540 compatibility(ANSI);
1541 case 'B':
1542 move(curs.x, curs.y + def(esc_args[0], 1), 1);
1543 seen_disp_event = TRUE;
1544 break;
1545 case 'a': /* move right N cols */
1546 compatibility(ANSI);
1547 case ANSI('c', '>'): /* report xterm version */
1548 compatibility(OTHER);
1549 /* this reports xterm version 136 so that VIM can
1550 use the drag messages from the mouse reporting */
1551 ldisc_send("\033[>0;136;0c", 11);
1552 break;
1553 case 'C':
1554 move(curs.x + def(esc_args[0], 1), curs.y, 1);
1555 seen_disp_event = TRUE;
1556 break;
1557 case 'D': /* move left N cols */
1558 move(curs.x - def(esc_args[0], 1), curs.y, 1);
1559 seen_disp_event = TRUE;
1560 break;
1561 case 'E': /* move down N lines and CR */
1562 compatibility(ANSI);
1563 move(0, curs.y + def(esc_args[0], 1), 1);
1564 seen_disp_event = TRUE;
1565 break;
1566 case 'F': /* move up N lines and CR */
1567 compatibility(ANSI);
1568 move(0, curs.y - def(esc_args[0], 1), 1);
1569 seen_disp_event = TRUE;
1570 break;
1571 case 'G':
1572 case '`': /* set horizontal posn */
1573 compatibility(ANSI);
1574 move(def(esc_args[0], 1) - 1, curs.y, 0);
1575 seen_disp_event = TRUE;
1576 break;
1577 case 'd': /* set vertical posn */
1578 compatibility(ANSI);
1579 move(curs.x,
1580 (dec_om ? marg_t : 0) + def(esc_args[0],
1581 1) - 1,
1582 (dec_om ? 2 : 0));
1583 seen_disp_event = TRUE;
1584 break;
1585 case 'H':
1586 case 'f': /* set horz and vert posns at once */
1587 if (esc_nargs < 2)
1588 esc_args[1] = ARG_DEFAULT;
1589 move(def(esc_args[1], 1) - 1,
1590 (dec_om ? marg_t : 0) + def(esc_args[0],
1591 1) - 1,
1592 (dec_om ? 2 : 0));
1593 seen_disp_event = TRUE;
1594 break;
1595 case 'J': /* erase screen or parts of it */
1596 {
1597 unsigned int i = def(esc_args[0], 0) + 1;
1598 if (i > 3)
1599 i = 0;
1600 erase_lots(FALSE, !!(i & 2), !!(i & 1));
1601 }
1602 disptop = 0;
1603 seen_disp_event = TRUE;
1604 break;
1605 case 'K': /* erase line or parts of it */
1606 {
1607 unsigned int i = def(esc_args[0], 0) + 1;
1608 if (i > 3)
1609 i = 0;
1610 erase_lots(TRUE, !!(i & 2), !!(i & 1));
1611 }
1612 seen_disp_event = TRUE;
1613 break;
1614 case 'L': /* insert lines */
1615 compatibility(VT102);
1616 if (curs.y <= marg_b)
1617 scroll(curs.y, marg_b, -def(esc_args[0], 1),
1618 FALSE);
1619 fix_cpos;
1620 seen_disp_event = TRUE;
1621 break;
1622 case 'M': /* delete lines */
1623 compatibility(VT102);
1624 if (curs.y <= marg_b)
1625 scroll(curs.y, marg_b, def(esc_args[0], 1),
1626 TRUE);
1627 fix_cpos;
1628 seen_disp_event = TRUE;
1629 break;
1630 case '@': /* insert chars */
1631 /* XXX VTTEST says this is vt220, vt510 manual says vt102 */
1632 compatibility(VT102);
1633 insch(def(esc_args[0], 1));
1634 seen_disp_event = TRUE;
1635 break;
1636 case 'P': /* delete chars */
1637 compatibility(VT102);
1638 insch(-def(esc_args[0], 1));
1639 seen_disp_event = TRUE;
1640 break;
1641 case 'c': /* terminal type query */
1642 compatibility(VT100);
1643 /* This is the response for a VT102 */
1644 ldisc_send(id_string, strlen(id_string));
1645 break;
1646 case 'n': /* cursor position query */
1647 if (esc_args[0] == 6) {
1648 char buf[32];
1649 sprintf(buf, "\033[%d;%dR", curs.y + 1,
1650 curs.x + 1);
1651 ldisc_send(buf, strlen(buf));
1652 } else if (esc_args[0] == 5) {
1653 ldisc_send("\033[0n", 4);
1654 }
1655 break;
1656 case 'h': /* toggle modes to high */
1657 case ANSI_QUE('h'):
1658 compatibility(VT100);
1659 {
1660 int i;
1661 for (i = 0; i < esc_nargs; i++)
1662 toggle_mode(esc_args[i], esc_query, TRUE);
1663 }
1664 break;
1665 case 'l': /* toggle modes to low */
1666 case ANSI_QUE('l'):
1667 compatibility(VT100);
1668 {
1669 int i;
1670 for (i = 0; i < esc_nargs; i++)
1671 toggle_mode(esc_args[i], esc_query, FALSE);
1672 }
1673 break;
1674 case 'g': /* clear tabs */
1675 compatibility(VT100);
1676 if (esc_nargs == 1) {
1677 if (esc_args[0] == 0) {
1678 tabs[curs.x] = FALSE;
1679 } else if (esc_args[0] == 3) {
1680 int i;
1681 for (i = 0; i < cols; i++)
1682 tabs[i] = FALSE;
1683 }
1684 }
1685 break;
1686 case 'r': /* set scroll margins */
1687 compatibility(VT100);
1688 if (esc_nargs <= 2) {
1689 int top, bot;
1690 top = def(esc_args[0], 1) - 1;
1691 bot = (esc_nargs <= 1
1692 || esc_args[1] ==
1693 0 ? rows : def(esc_args[1], rows)) - 1;
1694 if (bot >= rows)
1695 bot = rows - 1;
1696 /* VTTEST Bug 9 - if region is less than 2 lines
1697 * don't change region.
1698 */
1699 if (bot - top > 0) {
1700 marg_t = top;
1701 marg_b = bot;
1702 curs.x = 0;
1703 /*
1704 * I used to think the cursor should be
1705 * placed at the top of the newly marginned
1706 * area. Apparently not: VMS TPU falls over
1707 * if so.
1708 *
1709 * Well actually it should for Origin mode - RDB
1710 */
1711 curs.y = (dec_om ? marg_t : 0);
1712 fix_cpos;
1713 seen_disp_event = TRUE;
1714 }
1715 }
1716 break;
1717 case 'm': /* set graphics rendition */
1718 {
1719 /*
1720 * A VT100 without the AVO only had one attribute, either
1721 * underline or reverse video depending on the cursor type,
1722 * this was selected by CSI 7m.
1723 *
1724 * case 2:
1725 * This is sometimes DIM, eg on the GIGI and Linux
1726 * case 8:
1727 * This is sometimes INVIS various ANSI.
1728 * case 21:
1729 * This like 22 disables BOLD, DIM and INVIS
1730 *
1731 * The ANSI colours appear on any terminal that has colour
1732 * (obviously) but the interaction between sgr0 and the
1733 * colours varies but is usually related to the background
1734 * colour erase item.
1735 * The interaction between colour attributes and the mono
1736 * ones is also very implementation dependent.
1737 *
1738 * The 39 and 49 attributes are likely to be unimplemented.
1739 */
1740 int i;
1741 for (i = 0; i < esc_nargs; i++) {
1742 switch (def(esc_args[i], 0)) {
1743 case 0: /* restore defaults */
1744 curr_attr = ATTR_DEFAULT;
1745 break;
1746 case 1: /* enable bold */
1747 compatibility(VT100AVO);
1748 curr_attr |= ATTR_BOLD;
1749 break;
1750 case 21: /* (enable double underline) */
1751 compatibility(OTHER);
1752 case 4: /* enable underline */
1753 compatibility(VT100AVO);
1754 curr_attr |= ATTR_UNDER;
1755 break;
1756 case 5: /* enable blink */
1757 compatibility(VT100AVO);
1758 curr_attr |= ATTR_BLINK;
1759 break;
1760 case 7: /* enable reverse video */
1761 curr_attr |= ATTR_REVERSE;
1762 break;
1763 case 22: /* disable bold */
1764 compatibility2(OTHER, VT220);
1765 curr_attr &= ~ATTR_BOLD;
1766 break;
1767 case 24: /* disable underline */
1768 compatibility2(OTHER, VT220);
1769 curr_attr &= ~ATTR_UNDER;
1770 break;
1771 case 25: /* disable blink */
1772 compatibility2(OTHER, VT220);
1773 curr_attr &= ~ATTR_BLINK;
1774 break;
1775 case 27: /* disable reverse video */
1776 compatibility2(OTHER, VT220);
1777 curr_attr &= ~ATTR_REVERSE;
1778 break;
1779 case 30:
1780 case 31:
1781 case 32:
1782 case 33:
1783 case 34:
1784 case 35:
1785 case 36:
1786 case 37:
1787 /* foreground */
1788 curr_attr &= ~ATTR_FGMASK;
1789 curr_attr |=
1790 (esc_args[i] - 30) << ATTR_FGSHIFT;
1791 break;
1792 case 39: /* default-foreground */
1793 curr_attr &= ~ATTR_FGMASK;
1794 curr_attr |= ATTR_DEFFG;
1795 break;
1796 case 40:
1797 case 41:
1798 case 42:
1799 case 43:
1800 case 44:
1801 case 45:
1802 case 46:
1803 case 47:
1804 /* background */
1805 curr_attr &= ~ATTR_BGMASK;
1806 curr_attr |=
1807 (esc_args[i] - 40) << ATTR_BGSHIFT;
1808 break;
1809 case 49: /* default-background */
1810 curr_attr &= ~ATTR_BGMASK;
1811 curr_attr |= ATTR_DEFBG;
1812 break;
1813 }
1814 }
1815 if (use_bce)
1816 erase_char =
1817 (' ' |
1818 (curr_attr &
1819 (ATTR_FGMASK | ATTR_BGMASK |
1820 ATTR_BLINK)));
1821 }
1822 break;
1823 case 's': /* save cursor */
1824 save_cursor(TRUE);
1825 break;
1826 case 'u': /* restore cursor */
1827 save_cursor(FALSE);
1828 seen_disp_event = TRUE;
1829 break;
1830 case 't': /* set page size - ie window height */
1831 /*
1832 * VT340/VT420 sequence DECSLPP, DEC only allows values
1833 * 24/25/36/48/72/144 other emulators (eg dtterm) use
1834 * illegal values (eg first arg 1..9) for window changing
1835 * and reports.
1836 */
1837 compatibility(VT340TEXT);
1838 if (esc_nargs <= 1
1839 && (esc_args[0] < 1 || esc_args[0] >= 24)) {
1840 request_resize(cols, def(esc_args[0], 24), 0);
1841 deselect();
1842 }
1843 break;
1844 case 'S':
1845 compatibility(SCOANSI);
1846 scroll(marg_t, marg_b, def(esc_args[0], 1), TRUE);
1847 fix_cpos;
1848 wrapnext = FALSE;
1849 seen_disp_event = TRUE;
1850 break;
1851 case 'T':
1852 compatibility(SCOANSI);
1853 scroll(marg_t, marg_b, -def(esc_args[0], 1), TRUE);
1854 fix_cpos;
1855 wrapnext = FALSE;
1856 seen_disp_event = TRUE;
1857 break;
1858 case ANSI('|', '*'):
1859 /* VT420 sequence DECSNLS
1860 * Set number of lines on screen
1861 * VT420 uses VGA like hardware and can support any size in
1862 * reasonable range (24..49 AIUI) with no default specified.
1863 */
1864 compatibility(VT420);
1865 if (esc_nargs == 1 && esc_args[0] > 0) {
1866 request_resize(cols,
1867 def(esc_args[0], cfg.height),
1868 0);
1869 deselect();
1870 }
1871 break;
1872 case ANSI('|', '$'):
1873 /* VT340/VT420 sequence DECSCPP
1874 * Set number of columns per page
1875 * Docs imply range is only 80 or 132, but I'll allow any.
1876 */
1877 compatibility(VT340TEXT);
1878 if (esc_nargs <= 1) {
1879 request_resize(def(esc_args[0], cfg.width),
1880 rows, 0);
1881 deselect();
1882 }
1883 break;
1884 case 'X': /* write N spaces w/o moving cursor */
1885 /* XXX VTTEST says this is vt220, vt510 manual says vt100 */
1886 compatibility(ANSIMIN);
1887 {
1888 int n = def(esc_args[0], 1);
1889 pos cursplus;
1890 unsigned long *p = cpos;
1891 if (n > cols - curs.x)
1892 n = cols - curs.x;
1893 cursplus = curs;
1894 cursplus.x += n;
1895 check_selection(curs, cursplus);
1896 while (n--)
1897 *p++ = erase_char;
1898 seen_disp_event = TRUE;
1899 }
1900 break;
1901 case 'x': /* report terminal characteristics */
1902 compatibility(VT100);
1903 {
1904 char buf[32];
1905 int i = def(esc_args[0], 0);
1906 if (i == 0 || i == 1) {
1907 strcpy(buf, "\033[2;1;1;112;112;1;0x");
1908 buf[2] += i;
1909 ldisc_send(buf, 20);
1910 }
1911 }
1912 break;
1913 case ANSI('L', '='):
1914 compatibility(OTHER);
1915 use_bce = (esc_args[0] <= 0);
1916 erase_char = ERASE_CHAR;
1917 if (use_bce)
1918 erase_char =
1919 (' ' |
1920 (curr_attr &
1921 (ATTR_FGMASK | ATTR_BGMASK)));
1922 break;
1923 case ANSI('E', '='):
1924 compatibility(OTHER);
1925 blink_is_real = (esc_args[0] >= 1);
1926 break;
1927 case ANSI('p', '"'):
1928 /* Allow the host to make this emulator a 'perfect' VT102.
1929 * This first appeared in the VT220, but we do need to get
1930 * back to PuTTY mode so I won't check it.
1931 *
1932 * The arg in 40..42,50 are a PuTTY extension.
1933 * The 2nd arg, 8bit vs 7bit is not checked.
1934 *
1935 * Setting VT102 mode should also change the Fkeys to
1936 * generate PF* codes as a real VT102 has no Fkeys.
1937 * The VT220 does this, F11..F13 become ESC,BS,LF other Fkeys
1938 * send nothing.
1939 *
1940 * Note ESC c will NOT change this!
1941 */
1942
1943 switch (esc_args[0]) {
1944 case 61:
1945 compatibility_level &= ~TM_VTXXX;
1946 compatibility_level |= TM_VT102;
1947 break;
1948 case 62:
1949 compatibility_level &= ~TM_VTXXX;
1950 compatibility_level |= TM_VT220;
1951 break;
1952
1953 default:
1954 if (esc_args[0] > 60 && esc_args[0] < 70)
1955 compatibility_level |= TM_VTXXX;
1956 break;
1957
1958 case 40:
1959 compatibility_level &= TM_VTXXX;
1960 break;
1961 case 41:
1962 compatibility_level = TM_PUTTY;
1963 break;
1964 case 42:
1965 compatibility_level = TM_SCOANSI;
1966 break;
1967
1968 case ARG_DEFAULT:
1969 compatibility_level = TM_PUTTY;
1970 break;
1971 case 50:
1972 break;
1973 }
1974
1975 /* Change the response to CSI c */
1976 if (esc_args[0] == 50) {
1977 int i;
1978 char lbuf[64];
1979 strcpy(id_string, "\033[?");
1980 for (i = 1; i < esc_nargs; i++) {
1981 if (i != 1)
1982 strcat(id_string, ";");
1983 sprintf(lbuf, "%d", esc_args[i]);
1984 strcat(id_string, lbuf);
1985 }
1986 strcat(id_string, "c");
1987 }
1988 #if 0
1989 /* Is this a good idea ?
1990 * Well we should do a soft reset at this point ...
1991 */
1992 if (!has_compat(VT420) && has_compat(VT100)) {
1993 if (reset_132)
1994 request_resize(132, 24, 1);
1995 else
1996 request_resize(80, 24, 1);
1997 }
1998 #endif
1999 break;
2000 }
2001 break;
2002 case SEEN_OSC:
2003 osc_w = FALSE;
2004 switch (c) {
2005 case 'P': /* Linux palette sequence */
2006 termstate = SEEN_OSC_P;
2007 osc_strlen = 0;
2008 break;
2009 case 'R': /* Linux palette reset */
2010 palette_reset();
2011 term_invalidate();
2012 termstate = TOPLEVEL;
2013 break;
2014 case 'W': /* word-set */
2015 termstate = SEEN_OSC_W;
2016 osc_w = TRUE;
2017 break;
2018 case '0':
2019 case '1':
2020 case '2':
2021 case '3':
2022 case '4':
2023 case '5':
2024 case '6':
2025 case '7':
2026 case '8':
2027 case '9':
2028 esc_args[0] = 10 * esc_args[0] + c - '0';
2029 break;
2030 case 'L':
2031 /*
2032 * Grotty hack to support xterm and DECterm title
2033 * sequences concurrently.
2034 */
2035 if (esc_args[0] == 2) {
2036 esc_args[0] = 1;
2037 break;
2038 }
2039 /* else fall through */
2040 default:
2041 termstate = OSC_STRING;
2042 osc_strlen = 0;
2043 }
2044 break;
2045 case OSC_STRING:
2046 /*
2047 * This OSC stuff is EVIL. It takes just one character to get into
2048 * sysline mode and it's not initially obvious how to get out.
2049 * So I've added CR and LF as string aborts.
2050 * This shouldn't effect compatibility as I believe embedded
2051 * control characters are supposed to be interpreted (maybe?)
2052 * and they don't display anything useful anyway.
2053 *
2054 * -- RDB
2055 */
2056 if (c == '\n' || c == '\r') {
2057 termstate = TOPLEVEL;
2058 } else if (c == 0234 || c == '\007') {
2059 /*
2060 * These characters terminate the string; ST and BEL
2061 * terminate the sequence and trigger instant
2062 * processing of it, whereas ESC goes back to SEEN_ESC
2063 * mode unless it is followed by \, in which case it is
2064 * synonymous with ST in the first place.
2065 */
2066 do_osc();
2067 termstate = TOPLEVEL;
2068 } else if (c == '\033')
2069 termstate = OSC_MAYBE_ST;
2070 else if (osc_strlen < OSC_STR_MAX)
2071 osc_string[osc_strlen++] = c;
2072 break;
2073 case SEEN_OSC_P:
2074 {
2075 int max = (osc_strlen == 0 ? 21 : 16);
2076 int val;
2077 if (c >= '0' && c <= '9')
2078 val = c - '0';
2079 else if (c >= 'A' && c <= 'A' + max - 10)
2080 val = c - 'A' + 10;
2081 else if (c >= 'a' && c <= 'a' + max - 10)
2082 val = c - 'a' + 10;
2083 else {
2084 termstate = TOPLEVEL;
2085 break;
2086 }
2087 osc_string[osc_strlen++] = val;
2088 if (osc_strlen >= 7) {
2089 palette_set(osc_string[0],
2090 osc_string[1] * 16 + osc_string[2],
2091 osc_string[3] * 16 + osc_string[4],
2092 osc_string[5] * 16 + osc_string[6]);
2093 term_invalidate();
2094 termstate = TOPLEVEL;
2095 }
2096 }
2097 break;
2098 case SEEN_OSC_W:
2099 switch (c) {
2100 case '0':
2101 case '1':
2102 case '2':
2103 case '3':
2104 case '4':
2105 case '5':
2106 case '6':
2107 case '7':
2108 case '8':
2109 case '9':
2110 esc_args[0] = 10 * esc_args[0] + c - '0';
2111 break;
2112 default:
2113 termstate = OSC_STRING;
2114 osc_strlen = 0;
2115 }
2116 break;
2117 case VT52_ESC:
2118 termstate = TOPLEVEL;
2119 seen_disp_event = TRUE;
2120 switch (c) {
2121 case 'A':
2122 move(curs.x, curs.y - 1, 1);
2123 break;
2124 case 'B':
2125 move(curs.x, curs.y + 1, 1);
2126 break;
2127 case 'C':
2128 move(curs.x + 1, curs.y, 1);
2129 break;
2130 case 'D':
2131 move(curs.x - 1, curs.y, 1);
2132 break;
2133 /*
2134 * From the VT100 Manual
2135 * NOTE: The special graphics characters in the VT100
2136 * are different from those in the VT52
2137 *
2138 * From VT102 manual:
2139 * 137 _ Blank - Same
2140 * 140 ` Reserved - Humm.
2141 * 141 a Solid rectangle - Similar
2142 * 142 b 1/ - Top half of fraction for the
2143 * 143 c 3/ - subscript numbers below.
2144 * 144 d 5/
2145 * 145 e 7/
2146 * 146 f Degrees - Same
2147 * 147 g Plus or minus - Same
2148 * 150 h Right arrow
2149 * 151 i Ellipsis (dots)
2150 * 152 j Divide by
2151 * 153 k Down arrow
2152 * 154 l Bar at scan 0
2153 * 155 m Bar at scan 1
2154 * 156 n Bar at scan 2
2155 * 157 o Bar at scan 3 - Similar
2156 * 160 p Bar at scan 4 - Similar
2157 * 161 q Bar at scan 5 - Similar
2158 * 162 r Bar at scan 6 - Same
2159 * 163 s Bar at scan 7 - Similar
2160 * 164 t Subscript 0
2161 * 165 u Subscript 1
2162 * 166 v Subscript 2
2163 * 167 w Subscript 3
2164 * 170 x Subscript 4
2165 * 171 y Subscript 5
2166 * 172 z Subscript 6
2167 * 173 { Subscript 7
2168 * 174 | Subscript 8
2169 * 175 } Subscript 9
2170 * 176 ~ Paragraph
2171 *
2172 */
2173 case 'F':
2174 cset_attr[cset = 0] = ATTR_LINEDRW;
2175 break;
2176 case 'G':
2177 cset_attr[cset = 0] = ATTR_ASCII;
2178 break;
2179 case 'H':
2180 move(0, 0, 0);
2181 break;
2182 case 'I':
2183 if (curs.y == 0)
2184 scroll(0, rows - 1, -1, TRUE);
2185 else if (curs.y > 0)
2186 curs.y--;
2187 fix_cpos;
2188 wrapnext = FALSE;
2189 break;
2190 case 'J':
2191 erase_lots(FALSE, FALSE, TRUE);
2192 disptop = 0;
2193 break;
2194 case 'K':
2195 erase_lots(TRUE, FALSE, TRUE);
2196 break;
2197 #if 0
2198 case 'V':
2199 /* XXX Print cursor line */
2200 break;
2201 case 'W':
2202 /* XXX Start controller mode */
2203 break;
2204 case 'X':
2205 /* XXX Stop controller mode */
2206 break;
2207 #endif
2208 case 'Y':
2209 termstate = VT52_Y1;
2210 break;
2211 case 'Z':
2212 ldisc_send("\033/Z", 3);
2213 break;
2214 case '=':
2215 app_keypad_keys = TRUE;
2216 break;
2217 case '>':
2218 app_keypad_keys = FALSE;
2219 break;
2220 case '<':
2221 /* XXX This should switch to VT100 mode not current or default
2222 * VT mode. But this will only have effect in a VT220+
2223 * emulation.
2224 */
2225 vt52_mode = FALSE;
2226 blink_is_real = cfg.blinktext;
2227 break;
2228 #if 0
2229 case '^':
2230 /* XXX Enter auto print mode */
2231 break;
2232 case '_':
2233 /* XXX Exit auto print mode */
2234 break;
2235 case ']':
2236 /* XXX Print screen */
2237 break;
2238 #endif
2239
2240 #ifdef VT52_PLUS
2241 case 'E':
2242 /* compatibility(ATARI) */
2243 move(0, 0, 0);
2244 erase_lots(FALSE, FALSE, TRUE);
2245 disptop = 0;
2246 break;
2247 case 'L':
2248 /* compatibility(ATARI) */
2249 if (curs.y <= marg_b)
2250 scroll(curs.y, marg_b, -1, FALSE);
2251 break;
2252 case 'M':
2253 /* compatibility(ATARI) */
2254 if (curs.y <= marg_b)
2255 scroll(curs.y, marg_b, 1, TRUE);
2256 break;
2257 case 'b':
2258 /* compatibility(ATARI) */
2259 termstate = VT52_FG;
2260 break;
2261 case 'c':
2262 /* compatibility(ATARI) */
2263 termstate = VT52_BG;
2264 break;
2265 case 'd':
2266 /* compatibility(ATARI) */
2267 erase_lots(FALSE, TRUE, FALSE);
2268 disptop = 0;
2269 break;
2270 case 'e':
2271 /* compatibility(ATARI) */
2272 cursor_on = TRUE;
2273 break;
2274 case 'f':
2275 /* compatibility(ATARI) */
2276 cursor_on = FALSE;
2277 break;
2278 /* case 'j': Save cursor position - broken on ST */
2279 /* case 'k': Restore cursor position */
2280 case 'l':
2281 /* compatibility(ATARI) */
2282 erase_lots(TRUE, TRUE, TRUE);
2283 curs.x = 0;
2284 wrapnext = FALSE;
2285 fix_cpos;
2286 break;
2287 case 'o':
2288 /* compatibility(ATARI) */
2289 erase_lots(TRUE, TRUE, FALSE);
2290 break;
2291 case 'p':
2292 /* compatibility(ATARI) */
2293 curr_attr |= ATTR_REVERSE;
2294 break;
2295 case 'q':
2296 /* compatibility(ATARI) */
2297 curr_attr &= ~ATTR_REVERSE;
2298 break;
2299 case 'v': /* wrap Autowrap on - Wyse style */
2300 /* compatibility(ATARI) */
2301 wrap = 1;
2302 break;
2303 case 'w': /* Autowrap off */
2304 /* compatibility(ATARI) */
2305 wrap = 0;
2306 break;
2307
2308 case 'R':
2309 /* compatibility(OTHER) */
2310 vt52_bold = FALSE;
2311 curr_attr = ATTR_DEFAULT;
2312 if (use_bce)
2313 erase_char = (' ' |
2314 (curr_attr &
2315 (ATTR_FGMASK | ATTR_BGMASK |
2316 ATTR_BLINK)));
2317 break;
2318 case 'S':
2319 /* compatibility(VI50) */
2320 curr_attr |= ATTR_UNDER;
2321 break;
2322 case 'W':
2323 /* compatibility(VI50) */
2324 curr_attr &= ~ATTR_UNDER;
2325 break;
2326 case 'U':
2327 /* compatibility(VI50) */
2328 vt52_bold = TRUE;
2329 curr_attr |= ATTR_BOLD;
2330 break;
2331 case 'T':
2332 /* compatibility(VI50) */
2333 vt52_bold = FALSE;
2334 curr_attr &= ~ATTR_BOLD;
2335 break;
2336 #endif
2337 }
2338 break;
2339 case VT52_Y1:
2340 termstate = VT52_Y2;
2341 move(curs.x, c - ' ', 0);
2342 break;
2343 case VT52_Y2:
2344 termstate = TOPLEVEL;
2345 move(c - ' ', curs.y, 0);
2346 break;
2347
2348 #ifdef VT52_PLUS
2349 case VT52_FG:
2350 termstate = TOPLEVEL;
2351 curr_attr &= ~ATTR_FGMASK;
2352 curr_attr &= ~ATTR_BOLD;
2353 curr_attr |= (c & 0x7) << ATTR_FGSHIFT;
2354 if ((c & 0x8) || vt52_bold)
2355 curr_attr |= ATTR_BOLD;
2356
2357 if (use_bce)
2358 erase_char = (' ' |
2359 (curr_attr &
2360 (ATTR_FGMASK | ATTR_BGMASK |
2361 ATTR_BLINK)));
2362 break;
2363 case VT52_BG:
2364 termstate = TOPLEVEL;
2365 curr_attr &= ~ATTR_BGMASK;
2366 curr_attr &= ~ATTR_BLINK;
2367 curr_attr |= (c & 0x7) << ATTR_BGSHIFT;
2368
2369 /* Note: bold background */
2370 if (c & 0x8)
2371 curr_attr |= ATTR_BLINK;
2372
2373 if (use_bce)
2374 erase_char = (' ' |
2375 (curr_attr &
2376 (ATTR_FGMASK | ATTR_BGMASK |
2377 ATTR_BLINK)));
2378 break;
2379 #endif
2380 default: break; /* placate gcc warning about enum use */
2381 }
2382 if (selstate != NO_SELECTION) {
2383 pos cursplus = curs;
2384 incpos(cursplus);
2385 check_selection(curs, cursplus);
2386 }
2387 }
2388 inbuf_head = 0;
2389 }
2390
2391 #if 0
2392 /*
2393 * Compare two lines to determine whether they are sufficiently
2394 * alike to scroll-optimise one to the other. Return the degree of
2395 * similarity.
2396 */
2397 static int linecmp(unsigned long *a, unsigned long *b)
2398 {
2399 int i, n;
2400
2401 for (i = n = 0; i < cols; i++)
2402 n += (*a++ == *b++);
2403 return n;
2404 }
2405 #endif
2406
2407 /*
2408 * Given a context, update the window. Out of paranoia, we don't
2409 * allow WM_PAINT responses to do scrolling optimisations.
2410 */
2411 static void do_paint(Context ctx, int may_optimise)
2412 {
2413 int i, j, our_curs_y;
2414 unsigned long rv, cursor;
2415 pos scrpos;
2416 char ch[1024];
2417 long cursor_background = ERASE_CHAR;
2418 long ticks;
2419
2420 /*
2421 * Check the visual bell state.
2422 */
2423 if (in_vbell) {
2424 ticks = GetTickCount();
2425 if (ticks - vbell_timeout >= 0)
2426 in_vbell = FALSE;
2427 }
2428
2429 rv = (!rvideo ^ !in_vbell ? ATTR_REVERSE : 0);
2430
2431 /* Depends on:
2432 * screen array, disptop, scrtop,
2433 * selection, rv,
2434 * cfg.blinkpc, blink_is_real, tblinker,
2435 * curs.y, curs.x, blinker, cfg.blink_cur, cursor_on, has_focus, wrapnext
2436 */
2437
2438 /* Has the cursor position or type changed ? */
2439 if (cursor_on) {
2440 if (has_focus) {
2441 if (blinker || !cfg.blink_cur)
2442 cursor = TATTR_ACTCURS;
2443 else
2444 cursor = 0;
2445 } else
2446 cursor = TATTR_PASCURS;
2447 if (wrapnext)
2448 cursor |= TATTR_RIGHTCURS;
2449 } else
2450 cursor = 0;
2451 our_curs_y = curs.y - disptop;
2452
2453 if (dispcurs && (curstype != cursor ||
2454 dispcurs !=
2455 disptext + our_curs_y * (cols + 1) + curs.x)) {
2456 if (dispcurs > disptext && (dispcurs[-1] & ATTR_WIDE))
2457 dispcurs[-1] |= ATTR_INVALID;
2458 if ((*dispcurs & ATTR_WIDE))
2459 dispcurs[1] |= ATTR_INVALID;
2460 *dispcurs |= ATTR_INVALID;
2461 curstype = 0;
2462 }
2463 dispcurs = NULL;
2464
2465 /* The normal screen data */
2466 for (i = 0; i < rows; i++) {
2467 unsigned long *ldata;
2468 int lattr;
2469 int idx, dirty_line, dirty_run;
2470 unsigned long attr = 0;
2471 int updated_line = 0;
2472 int start = 0;
2473 int ccount = 0;
2474 int last_run_dirty = 0;
2475
2476 scrpos.y = i + disptop;
2477 ldata = lineptr(scrpos.y);
2478 lattr = (ldata[cols] & LATTR_MODE);
2479
2480 idx = i * (cols + 1);
2481 dirty_run = dirty_line = (ldata[cols] != disptext[idx + cols]);
2482 disptext[idx + cols] = ldata[cols];
2483
2484 for (j = 0; j < cols; j++, idx++) {
2485 unsigned long tattr, tchar;
2486 unsigned long *d = ldata + j;
2487 int break_run;
2488 scrpos.x = j;
2489
2490 tchar = (*d & (CHAR_MASK | CSET_MASK));
2491 tattr = (*d & (ATTR_MASK ^ CSET_MASK));
2492 switch (tchar & CSET_MASK) {
2493 case ATTR_ASCII:
2494 tchar = unitab_line[tchar & 0xFF];
2495 break;
2496 case ATTR_LINEDRW:
2497 tchar = unitab_xterm[tchar & 0xFF];
2498 break;
2499 }
2500 tattr |= (tchar & CSET_MASK);
2501 tchar &= CHAR_MASK;
2502
2503 /* Video reversing things */
2504 tattr = (tattr ^ rv
2505 ^ (posle(selstart, scrpos) &&
2506 poslt(scrpos, selend) ? ATTR_REVERSE : 0));
2507
2508 /* 'Real' blinking ? */
2509 if (blink_is_real && (tattr & ATTR_BLINK)) {
2510 if (has_focus && tblinker) {
2511 tchar = ' ';
2512 tattr &= ~CSET_MASK;
2513 tattr |= ATTR_ACP;
2514 }
2515 tattr &= ~ATTR_BLINK;
2516 }
2517
2518 /* Cursor here ? Save the 'background' */
2519 if (i == our_curs_y && j == curs.x) {
2520 cursor_background = tattr | tchar;
2521 dispcurs = disptext + idx;
2522 }
2523
2524 if ((disptext[idx] ^ tattr) & ATTR_WIDE)
2525 dirty_line = TRUE;
2526
2527 break_run = (tattr != attr || j - start >= sizeof(ch));
2528
2529 /* Special hack for VT100 Linedraw glyphs */
2530 if ((attr & CSET_MASK) == 0x2300 && tchar >= 0xBA
2531 && tchar <= 0xBD) break_run = TRUE;
2532
2533 if (!dbcs_screenfont && !dirty_line) {
2534 if ((tchar | tattr) == disptext[idx])
2535 break_run = TRUE;
2536 else if (!dirty_run && ccount == 1)
2537 break_run = TRUE;
2538 }
2539
2540 if (break_run) {
2541 if ((dirty_run || last_run_dirty) && ccount > 0) {
2542 do_text(ctx, start, i, ch, ccount, attr, lattr);
2543 updated_line = 1;
2544 }
2545 start = j;
2546 ccount = 0;
2547 attr = tattr;
2548 if (dbcs_screenfont)
2549 last_run_dirty = dirty_run;
2550 dirty_run = dirty_line;
2551 }
2552
2553 if ((tchar | tattr) != disptext[idx])
2554 dirty_run = TRUE;
2555 ch[ccount++] = (char) tchar;
2556 disptext[idx] = tchar | tattr;
2557
2558 /* If it's a wide char step along to the next one. */
2559 if (tattr & ATTR_WIDE) {
2560 if (++j < cols) {
2561 idx++;
2562 d++;
2563 /* Cursor is here ? Ouch! */
2564 if (i == our_curs_y && j == curs.x) {
2565 cursor_background = *d;
2566 dispcurs = disptext + idx;
2567 }
2568 if (disptext[idx] != *d)
2569 dirty_run = TRUE;
2570 disptext[idx] = *d;
2571 }
2572 }
2573 }
2574 if (dirty_run && ccount > 0) {
2575 do_text(ctx, start, i, ch, ccount, attr, lattr);
2576 updated_line = 1;
2577 }
2578
2579 /* Cursor on this line ? (and changed) */
2580 if (i == our_curs_y && (curstype != cursor || updated_line)) {
2581 ch[0] = (char) (cursor_background & CHAR_MASK);
2582 attr = (cursor_background & ATTR_MASK) | cursor;
2583 do_cursor(ctx, curs.x, i, ch, 1, attr, lattr);
2584 curstype = cursor;
2585 }
2586 }
2587 }
2588
2589 /*
2590 * Flick the switch that says if blinking things should be shown or hidden.
2591 */
2592
2593 void term_blink(int flg)
2594 {
2595 static long last_blink = 0;
2596 static long last_tblink = 0;
2597 long now, blink_diff;
2598
2599 now = GetTickCount();
2600 blink_diff = now - last_tblink;
2601
2602 /* Make sure the text blinks no more than 2Hz */
2603 if (blink_diff < 0 || blink_diff > 450) {
2604 last_tblink = now;
2605 tblinker = !tblinker;
2606 }
2607
2608 if (flg) {
2609 blinker = 1;
2610 last_blink = now;
2611 return;
2612 }
2613
2614 blink_diff = now - last_blink;
2615
2616 /* Make sure the cursor blinks no faster than GetCaretBlinkTime() */
2617 if (blink_diff >= 0 && blink_diff < (long) GetCaretBlinkTime())
2618 return;
2619
2620 last_blink = now;
2621 blinker = !blinker;
2622 }
2623
2624 /*
2625 * Invalidate the whole screen so it will be repainted in full.
2626 */
2627 void term_invalidate(void)
2628 {
2629 int i;
2630
2631 for (i = 0; i < rows * (cols + 1); i++)
2632 disptext[i] = ATTR_INVALID;
2633 }
2634
2635 /*
2636 * Paint the window in response to a WM_PAINT message.
2637 */
2638 void term_paint(Context ctx, int l, int t, int r, int b)
2639 {
2640 int i, j, left, top, right, bottom;
2641
2642 left = l / font_width;
2643 right = (r - 1) / font_width;
2644 top = t / font_height;
2645 bottom = (b - 1) / font_height;
2646 for (i = top; i <= bottom && i < rows; i++) {
2647 if ((disptext[i * (cols + 1) + cols] & LATTR_MODE) == LATTR_NORM)
2648 for (j = left; j <= right && j < cols; j++)
2649 disptext[i * (cols + 1) + j] = ATTR_INVALID;
2650 else
2651 for (j = left / 2; j <= right / 2 + 1 && j < cols; j++)
2652 disptext[i * (cols + 1) + j] = ATTR_INVALID;
2653 }
2654
2655 /* This should happen soon enough, also for some reason it sometimes
2656 * fails to actually do anything when re-sizing ... painting the wrong
2657 * window perhaps ?
2658 do_paint (ctx, FALSE);
2659 */
2660 }
2661
2662 /*
2663 * Attempt to scroll the scrollback. The second parameter gives the
2664 * position we want to scroll to; the first is +1 to denote that
2665 * this position is relative to the beginning of the scrollback, -1
2666 * to denote it is relative to the end, and 0 to denote that it is
2667 * relative to the current position.
2668 */
2669 void term_scroll(int rel, int where)
2670 {
2671 int sbtop = -count234(scrollback);
2672
2673 disptop = (rel < 0 ? 0 : rel > 0 ? sbtop : disptop) + where;
2674 if (disptop < sbtop)
2675 disptop = sbtop;
2676 if (disptop > 0)
2677 disptop = 0;
2678 update_sbar();
2679 term_update();
2680 }
2681
2682 static void clipme(pos top, pos bottom)
2683 {
2684 wchar_t *workbuf;
2685 wchar_t *wbptr; /* where next char goes within workbuf */
2686 int wblen = 0; /* workbuf len */
2687 int buflen; /* amount of memory allocated to workbuf */
2688
2689 buflen = 5120; /* Default size */
2690 workbuf = smalloc(buflen * sizeof(wchar_t));
2691 wbptr = workbuf; /* start filling here */
2692
2693 while (poslt(top, bottom)) {
2694 int nl = FALSE;
2695 unsigned long *ldata = lineptr(top.y);
2696 pos nlpos;
2697
2698 nlpos.y = top.y;
2699 nlpos.x = cols;
2700
2701 if (!(ldata[cols] & LATTR_WRAPPED)) {
2702 while (((ldata[nlpos.x - 1] & 0xFF) == 0x20 ||
2703 (DIRECT_CHAR(ldata[nlpos.x - 1]) &&
2704 (ldata[nlpos.x - 1] & CHAR_MASK) == 0x20))
2705 && poslt(top, nlpos))
2706 decpos(nlpos);
2707 if (poslt(nlpos, bottom))
2708 nl = TRUE;
2709 }
2710 while (poslt(top, bottom) && poslt(top, nlpos)) {
2711 #if 0
2712 char cbuf[16], *p;
2713 sprintf(cbuf, "<U+%04x>", (ldata[top.x] & 0xFFFF));
2714 #else
2715 wchar_t cbuf[16], *p;
2716 int uc = (ldata[top.x] & 0xFFFF);
2717 int set, c;
2718
2719 if (uc == UCSWIDE) {
2720 top.x++;
2721 continue;
2722 }
2723
2724 switch (uc & CSET_MASK) {
2725 case ATTR_LINEDRW:
2726 if (!cfg.rawcnp) {
2727 uc = unitab_xterm[uc & 0xFF];
2728 break;
2729 }
2730 case ATTR_ASCII:
2731 uc = unitab_line[uc & 0xFF];
2732 break;
2733 }
2734 switch (uc & CSET_MASK) {
2735 case ATTR_ACP:
2736 uc = unitab_font[uc & 0xFF];
2737 break;
2738 case ATTR_OEMCP:
2739 uc = unitab_oemcp[uc & 0xFF];
2740 break;
2741 }
2742
2743 set = (uc & CSET_MASK);
2744 c = (uc & CHAR_MASK);
2745 cbuf[0] = uc;
2746 cbuf[1] = 0;
2747
2748 if (DIRECT_FONT(uc)) {
2749 if (c >= ' ' && c != 0x7F) {
2750 unsigned char buf[4];
2751 WCHAR wbuf[4];
2752 int rv;
2753 if (IsDBCSLeadByteEx(font_codepage, (BYTE) c)) {
2754 buf[0] = c;
2755 buf[1] = (unsigned char) ldata[top.x + 1];
2756 rv = MultiByteToWideChar(font_codepage,
2757 0, buf, 2, wbuf, 4);
2758 top.x++;
2759 } else {
2760 buf[0] = c;
2761 rv = MultiByteToWideChar(font_codepage,
2762 0, buf, 1, wbuf, 4);
2763 }
2764
2765 if (rv > 0) {
2766 memcpy(cbuf, wbuf, rv * sizeof(wchar_t));
2767 cbuf[rv] = 0;
2768 }
2769 }
2770 }
2771 #endif
2772
2773 for (p = cbuf; *p; p++) {
2774 /* Enough overhead for trailing NL and nul */
2775 if (wblen >= buflen - 16) {
2776 workbuf =
2777 srealloc(workbuf,
2778 sizeof(wchar_t) * (buflen += 100));
2779 wbptr = workbuf + wblen;
2780 }
2781 wblen++;
2782 *wbptr++ = *p;
2783 }
2784 top.x++;
2785 }
2786 if (nl) {
2787 int i;
2788 for (i = 0; i < sel_nl_sz; i++) {
2789 wblen++;
2790 *wbptr++ = sel_nl[i];
2791 }
2792 }
2793 top.y++;
2794 top.x = 0;
2795 }
2796 wblen++;
2797 *wbptr++ = 0;
2798 write_clip(workbuf, wblen, FALSE); /* transfer to clipboard */
2799 if (buflen > 0) /* indicates we allocated this buffer */
2800 sfree(workbuf);
2801 }
2802
2803 void term_copyall(void)
2804 {
2805 pos top;
2806 top.y = -count234(scrollback);
2807 top.x = 0;
2808 clipme(top, curs);
2809 }
2810
2811 /*
2812 * The wordness array is mainly for deciding the disposition of the US-ASCII
2813 * characters.
2814 */
2815 static int wordtype(int uc)
2816 {
2817 static struct {
2818 int start, end, ctype;
2819 } *wptr, ucs_words[] = {
2820 {
2821 128, 160, 0}, {
2822 161, 191, 1}, {
2823 215, 215, 1}, {
2824 247, 247, 1}, {
2825 0x037e, 0x037e, 1}, /* Greek question mark */
2826 {
2827 0x0387, 0x0387, 1}, /* Greek ano teleia */
2828 {
2829 0x055a, 0x055f, 1}, /* Armenian punctuation */
2830 {
2831 0x0589, 0x0589, 1}, /* Armenian full stop */
2832 {
2833 0x0700, 0x070d, 1}, /* Syriac punctuation */
2834 {
2835 0x104a, 0x104f, 1}, /* Myanmar punctuation */
2836 {
2837 0x10fb, 0x10fb, 1}, /* Georgian punctuation */
2838 {
2839 0x1361, 0x1368, 1}, /* Ethiopic punctuation */
2840 {
2841 0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
2842 {
2843 0x17d4, 0x17dc, 1}, /* Khmer punctuation */
2844 {
2845 0x1800, 0x180a, 1}, /* Mongolian punctuation */
2846 {
2847 0x2000, 0x200a, 0}, /* Various spaces */
2848 {
2849 0x2070, 0x207f, 2}, /* superscript */
2850 {
2851 0x2080, 0x208f, 2}, /* subscript */
2852 {
2853 0x200b, 0x27ff, 1}, /* punctuation and symbols */
2854 {
2855 0x3000, 0x3000, 0}, /* ideographic space */
2856 {
2857 0x3001, 0x3020, 1}, /* ideographic punctuation */
2858 {
2859 0x303f, 0x309f, 3}, /* Hiragana */
2860 {
2861 0x30a0, 0x30ff, 3}, /* Katakana */
2862 {
2863 0x3300, 0x9fff, 3}, /* CJK Ideographs */
2864 {
2865 0xac00, 0xd7a3, 3}, /* Hangul Syllables */
2866 {
2867 0xf900, 0xfaff, 3}, /* CJK Ideographs */
2868 {
2869 0xfe30, 0xfe6b, 1}, /* punctuation forms */
2870 {
2871 0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
2872 {
2873 0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
2874 {
2875 0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
2876 {
2877 0xff5b, 0xff64, 1}, /* half/fullwidth ASCII */
2878 {
2879 0xfff0, 0xffff, 0}, /* half/fullwidth ASCII */
2880 {
2881 0, 0, 0}
2882 };
2883
2884 uc &= (CSET_MASK | CHAR_MASK);
2885
2886 switch (uc & CSET_MASK) {
2887 case ATTR_LINEDRW:
2888 uc = unitab_xterm[uc & 0xFF];
2889 break;
2890 case ATTR_ASCII:
2891 uc = unitab_line[uc & 0xFF];
2892 break;
2893 }
2894 switch (uc & CSET_MASK) {
2895 case ATTR_ACP:
2896 uc = unitab_font[uc & 0xFF];
2897 break;
2898 case ATTR_OEMCP:
2899 uc = unitab_oemcp[uc & 0xFF];
2900 break;
2901 }
2902
2903 if (uc < 0x80)
2904 return wordness[uc];
2905
2906 for (wptr = ucs_words; wptr->start; wptr++) {
2907 if (uc >= wptr->start && uc <= wptr->end)
2908 return wptr->ctype;
2909 }
2910
2911 return 2;
2912 }
2913
2914 /*
2915 * Spread the selection outwards according to the selection mode.
2916 */
2917 static pos sel_spread_half(pos p, int dir)
2918 {
2919 unsigned long *ldata;
2920 short wvalue;
2921
2922 ldata = lineptr(p.y);
2923
2924 switch (selmode) {
2925 case SM_CHAR:
2926 /*
2927 * In this mode, every character is a separate unit, except
2928 * for runs of spaces at the end of a non-wrapping line.
2929 */
2930 if (!(ldata[cols] & LATTR_WRAPPED)) {
2931 unsigned long *q = ldata + cols;
2932 while (q > ldata && (q[-1] & CHAR_MASK) == 0x20)
2933 q--;
2934 if (q == ldata + cols)
2935 q--;
2936 if (p.x >= q - ldata)
2937 p.x = (dir == -1 ? q - ldata : cols - 1);
2938 }
2939 break;
2940 case SM_WORD:
2941 /*
2942 * In this mode, the units are maximal runs of characters
2943 * whose `wordness' has the same value.
2944 */
2945 wvalue = wordtype(ldata[p.x]);
2946 if (dir == +1) {
2947 while (p.x < cols && wordtype(ldata[p.x + 1]) == wvalue)
2948 p.x++;
2949 } else {
2950 while (p.x > 0 && wordtype(ldata[p.x - 1]) == wvalue)
2951 p.x--;
2952 }
2953 break;
2954 case SM_LINE:
2955 /*
2956 * In this mode, every line is a unit.
2957 */
2958 p.x = (dir == -1 ? 0 : cols - 1);
2959 break;
2960 }
2961 return p;
2962 }
2963
2964 static void sel_spread(void)
2965 {
2966 selstart = sel_spread_half(selstart, -1);
2967 decpos(selend);
2968 selend = sel_spread_half(selend, +1);
2969 incpos(selend);
2970 }
2971
2972 void term_mouse(Mouse_Button b, Mouse_Action a, int x, int y,
2973 int shift, int ctrl)
2974 {
2975 pos selpoint;
2976 unsigned long *ldata;
2977
2978 if (y < 0)
2979 y = 0;
2980 if (y >= rows)
2981 y = rows - 1;
2982 if (x < 0) {
2983 if (y > 0) {
2984 x = cols - 1;
2985 y--;
2986 } else
2987 x = 0;
2988 }
2989 if (x >= cols)
2990 x = cols - 1;
2991
2992 selpoint.y = y + disptop;
2993 selpoint.x = x;
2994 ldata = lineptr(selpoint.y);
2995 if ((ldata[cols] & LATTR_MODE) != LATTR_NORM)
2996 selpoint.x /= 2;
2997
2998 if (xterm_mouse) {
2999 int encstate = 0, r, c;
3000 char abuf[16];
3001 static int is_down = 0;
3002
3003 switch (b) {
3004 case MBT_LEFT:
3005 encstate = 0x20; /* left button down */
3006 break;
3007 case MBT_MIDDLE:
3008 encstate = 0x21;
3009 break;
3010 case MBT_RIGHT:
3011 encstate = 0x22;
3012 break;
3013 case MBT_WHEEL_UP:
3014 encstate = 0x60;
3015 break;
3016 case MBT_WHEEL_DOWN:
3017 encstate = 0x61;
3018 break;
3019 default: break; /* placate gcc warning about enum use */
3020 }
3021 switch (a) {
3022 case MA_DRAG:
3023 if (xterm_mouse == 1)
3024 return;
3025 encstate += 0x20;
3026 break;
3027 case MA_RELEASE:
3028 encstate = 0x23;
3029 is_down = 0;
3030 break;
3031 case MA_CLICK:
3032 if (is_down == b)
3033 return;
3034 is_down = b;
3035 break;
3036 default: break; /* placate gcc warning about enum use */
3037 }
3038 if (shift)
3039 encstate += 0x04;
3040 if (ctrl)
3041 encstate += 0x10;
3042 r = y + 33;
3043 c = x + 33;
3044
3045 sprintf(abuf, "\033[M%c%c%c", encstate, c, r);
3046 ldisc_send(abuf, 6);
3047 return;
3048 }
3049
3050 b = translate_button(b);
3051
3052 if (b == MBT_SELECT && a == MA_CLICK) {
3053 deselect();
3054 selstate = ABOUT_TO;
3055 selanchor = selpoint;
3056 selmode = SM_CHAR;
3057 } else if (b == MBT_SELECT && (a == MA_2CLK || a == MA_3CLK)) {
3058 deselect();
3059 selmode = (a == MA_2CLK ? SM_WORD : SM_LINE);
3060 selstate = DRAGGING;
3061 selstart = selanchor = selpoint;
3062 selend = selstart;
3063 incpos(selend);
3064 sel_spread();
3065 } else if ((b == MBT_SELECT && a == MA_DRAG) ||
3066 (b == MBT_EXTEND && a != MA_RELEASE)) {
3067 if (selstate == ABOUT_TO && poseq(selanchor, selpoint))
3068 return;
3069 if (b == MBT_EXTEND && a != MA_DRAG && selstate == SELECTED) {
3070 if (posdiff(selpoint, selstart) <
3071 posdiff(selend, selstart) / 2) {
3072 selanchor = selend;
3073 decpos(selanchor);
3074 } else {
3075 selanchor = selstart;
3076 }
3077 selstate = DRAGGING;
3078 }
3079 if (selstate != ABOUT_TO && selstate != DRAGGING)
3080 selanchor = selpoint;
3081 selstate = DRAGGING;
3082 if (poslt(selpoint, selanchor)) {
3083 selstart = selpoint;
3084 selend = selanchor;
3085 incpos(selend);
3086 } else {
3087 selstart = selanchor;
3088 selend = selpoint;
3089 incpos(selend);
3090 }
3091 sel_spread();
3092 } else if ((b == MBT_SELECT || b == MBT_EXTEND) && a == MA_RELEASE) {
3093 if (selstate == DRAGGING) {
3094 /*
3095 * We've completed a selection. We now transfer the
3096 * data to the clipboard.
3097 */
3098 clipme(selstart, selend);
3099 selstate = SELECTED;
3100 } else
3101 selstate = NO_SELECTION;
3102 } else if (b == MBT_PASTE
3103 && (a == MA_CLICK || a == MA_2CLK || a == MA_3CLK)) {
3104 wchar_t *data;
3105 int len;
3106
3107 get_clip(&data, &len);
3108 if (data) {
3109 wchar_t *p, *q;
3110
3111 if (paste_buffer)
3112 sfree(paste_buffer);
3113 paste_pos = paste_hold = paste_len = 0;
3114 paste_buffer = smalloc(len * sizeof(wchar_t));
3115
3116 p = q = data;
3117 while (p < data + len) {
3118 while (p < data + len &&
3119 !(p <= data + len - sel_nl_sz &&
3120 !memcmp(p, sel_nl, sizeof(sel_nl))))
3121 p++;
3122
3123 {
3124 int i;
3125 for (i = 0; i < p - q; i++) {
3126 paste_buffer[paste_len++] = q[i];
3127 }
3128 }
3129
3130 if (p <= data + len - sel_nl_sz &&
3131 !memcmp(p, sel_nl, sizeof(sel_nl))) {
3132 paste_buffer[paste_len++] = '\r';
3133 p += sel_nl_sz;
3134 }
3135 q = p;
3136 }
3137
3138 /* Assume a small paste will be OK in one go. */
3139 if (paste_len < 256) {
3140 luni_send(paste_buffer, paste_len);
3141 if (paste_buffer)
3142 sfree(paste_buffer);
3143 paste_buffer = 0;
3144 paste_pos = paste_hold = paste_len = 0;
3145 }
3146 }
3147 get_clip(NULL, NULL);
3148 }
3149
3150 term_update();
3151 }
3152
3153 void term_nopaste()
3154 {
3155 if (paste_len == 0)
3156 return;
3157 sfree(paste_buffer);
3158 paste_buffer = 0;
3159 paste_len = 0;
3160 }
3161
3162 void term_paste()
3163 {
3164 static long last_paste = 0;
3165 long now, paste_diff;
3166
3167 if (paste_len == 0)
3168 return;
3169
3170 /* Don't wait forever to paste */
3171 if (paste_hold) {
3172 now = GetTickCount();
3173 paste_diff = now - last_paste;
3174 if (paste_diff >= 0 && paste_diff < 450)
3175 return;
3176 }
3177 paste_hold = 0;
3178
3179 while (paste_pos < paste_len) {
3180 int n = 0;
3181 while (n + paste_pos < paste_len) {
3182 if (paste_buffer[paste_pos + n++] == '\r')
3183 break;
3184 }
3185 luni_send(paste_buffer + paste_pos, n);
3186 paste_pos += n;
3187
3188 if (paste_pos < paste_len) {
3189 paste_hold = 1;
3190 return;
3191 }
3192 }
3193 sfree(paste_buffer);
3194 paste_buffer = 0;
3195 paste_len = 0;
3196 }
3197
3198 static void deselect(void)
3199 {
3200 selstate = NO_SELECTION;
3201 selstart.x = selstart.y = selend.x = selend.y = 0;
3202 }
3203
3204 void term_deselect(void)
3205 {
3206 deselect();
3207 term_update();
3208 }
3209
3210 int term_ldisc(int option)
3211 {
3212 if (option == LD_ECHO)
3213 return term_echoing;
3214 if (option == LD_EDIT)
3215 return term_editing;
3216 return FALSE;
3217 }
3218
3219 /*
3220 * from_backend(), to get data from the backend for the terminal.
3221 */
3222 void from_backend(int is_stderr, char *data, int len)
3223 {
3224 while (len--) {
3225 if (inbuf_head >= INBUF_SIZE)
3226 term_out();
3227 inbuf[inbuf_head++] = *data++;
3228 }
3229 }
3230
3231 /*
3232 * Log session traffic.
3233 */
3234 void logtraffic(unsigned char c, int logmode)
3235 {
3236 if (cfg.logtype > 0) {
3237 if (cfg.logtype == logmode) {
3238 /* deferred open file from pgm start? */
3239 if (!lgfp)
3240 logfopen();
3241 if (lgfp)
3242 fputc(c, lgfp);
3243 }
3244 }
3245 }
3246
3247 /* open log file append/overwrite mode */
3248 void logfopen(void)
3249 {
3250 char buf[256];
3251 time_t t;
3252 struct tm *tm;
3253 char writemod[4];
3254
3255 if (!cfg.logtype)
3256 return;
3257 sprintf(writemod, "wb"); /* default to rewrite */
3258 lgfp = fopen(cfg.logfilename, "r"); /* file already present? */
3259 if (lgfp) {
3260 int i;
3261 fclose(lgfp);
3262 i = askappend(cfg.logfilename);
3263 if (i == 1)
3264 writemod[0] = 'a'; /* set append mode */
3265 else if (i == 0) { /* cancelled */
3266 lgfp = NULL;
3267 cfg.logtype = 0; /* disable logging */
3268 return;
3269 }
3270 }
3271
3272 lgfp = fopen(cfg.logfilename, writemod);
3273 if (lgfp) { /* enter into event log */
3274 sprintf(buf, "%s session log (%s mode) to file : ",
3275 (writemod[0] == 'a') ? "Appending" : "Writing new",
3276 (cfg.logtype == LGTYP_ASCII ? "ASCII" :
3277 cfg.logtype == LGTYP_DEBUG ? "raw" : "<ukwn>"));
3278 /* Make sure we do not exceed the output buffer size */
3279 strncat(buf, cfg.logfilename, 128);
3280 buf[strlen(buf)] = '\0';
3281 logevent(buf);
3282
3283 /* --- write header line iinto log file */
3284 fputs("=~=~=~=~=~=~=~=~=~=~=~= PuTTY log ", lgfp);
3285 time(&t);
3286 tm = localtime(&t);
3287 strftime(buf, 24, "%Y.%m.%d %H:%M:%S", tm);
3288 fputs(buf, lgfp);
3289 fputs(" =~=~=~=~=~=~=~=~=~=~=~=\r\n", lgfp);
3290 }
3291 }
3292
3293 void logfclose(void)
3294 {
3295 if (lgfp) {
3296 fclose(lgfp);
3297 lgfp = NULL;
3298 }
3299 }
Local modifications for Simon Tatham's `PuTTY' SSH client and terminal emulator