374330e2 |
1 | #include <windows.h> |
2 | |
3 | #include <stdio.h> |
4 | #include <stdlib.h> |
5 | |
6 | #include "putty.h" |
7 | |
8 | static unsigned long *text; /* buffer of text on terminal screen */ |
9 | static unsigned long *scrtop; /* top of working screen */ |
10 | static unsigned long *disptop; /* top of displayed screen */ |
11 | static unsigned long *sbtop; /* top of scrollback */ |
12 | static unsigned long *cpos; /* cursor position (convenience) */ |
13 | static unsigned long *disptext; /* buffer of text on real screen */ |
14 | static unsigned long *wanttext; /* buffer of text we want on screen */ |
15 | static unsigned long *alttext; /* buffer of text on alt. screen */ |
16 | |
17 | static unsigned char *selspace; /* buffer for building selections in */ |
18 | |
19 | #define TSIZE (sizeof(*text)) |
20 | #define fix_cpos do { cpos = scrtop + curs_y * (cols+1) + curs_x; } while(0) |
21 | |
22 | static unsigned long curr_attr, save_attr; |
23 | |
24 | static int curs_x, curs_y; /* cursor */ |
25 | static int save_x, save_y; /* saved cursor position */ |
26 | static int marg_t, marg_b; /* scroll margins */ |
27 | static int dec_om; /* DEC origin mode flag */ |
28 | static int wrap, wrapnext; /* wrap flags */ |
29 | static int insert; /* insert-mode flag */ |
30 | static int cset; /* 0 or 1: which char set */ |
31 | static int save_cset, save_csattr; /* saved with cursor position */ |
32 | static int rvideo; /* global reverse video flag */ |
33 | |
34 | static unsigned long cset_attr[2]; |
35 | |
36 | /* |
37 | * Saved settings on the alternate screen. |
38 | */ |
39 | static int alt_x, alt_y, alt_om, alt_wrap, alt_wnext, alt_ins, alt_cset; |
40 | static int alt_t, alt_b; |
41 | static int alt_which; |
42 | |
43 | #define ARGS_MAX 32 /* max # of esc sequence arguments */ |
44 | #define ARG_DEFAULT -1 /* if an arg isn't specified */ |
45 | #define def(a,d) ( (a) == ARG_DEFAULT ? (d) : (a) ) |
46 | static int esc_args[ARGS_MAX]; |
47 | static int esc_nargs; |
48 | static int esc_query; |
49 | |
50 | #define OSC_STR_MAX 2048 |
51 | static int osc_strlen; |
52 | static char osc_string[OSC_STR_MAX+1]; |
53 | static int osc_w; |
54 | |
55 | static unsigned char *tabs; |
56 | |
57 | #define MAXNL 5 |
58 | static int nl_count; |
59 | |
60 | static int scroll_heuristic; |
61 | |
62 | static enum { |
63 | TOPLEVEL, IGNORE_NEXT, |
64 | SEEN_ESC, SEEN_CSI, SET_GL, SET_GR, |
65 | SEEN_OSC, SEEN_OSC_P, SEEN_OSC_W, OSC_STRING, OSC_MAYBE_ST, |
66 | SEEN_ESCHASH |
67 | } termstate; |
68 | |
69 | static enum { |
70 | NO_SELECTION, ABOUT_TO, DRAGGING, SELECTED |
71 | } selstate; |
72 | static enum { |
73 | SM_CHAR, SM_WORD, SM_LINE |
74 | } selmode; |
75 | static unsigned long *selstart, *selend, *selanchor; |
76 | |
77 | static short wordness[256] = { |
78 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 01 */ |
79 | 0,1,2,1,1,1,1,1,1,1,1,1,1,2,2,2, 2,2,2,2,2,2,2,2,2,2,1,1,1,1,1,1, /* 23 */ |
80 | 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,1,1,1,1,2, /* 45 */ |
81 | 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,1,1,1,1,1, /* 67 */ |
82 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 89 */ |
83 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* AB */ |
84 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2, /* CD */ |
85 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2, /* EF */ |
86 | }; |
87 | |
88 | static unsigned char sel_nl[] = SEL_NL; |
89 | |
90 | /* |
91 | * Internal prototypes. |
92 | */ |
93 | static void do_paint (Context, int); |
94 | static void erase_lots (int, int, int); |
95 | static void swap_screen (int); |
96 | static void update_sbar (void); |
97 | static void deselect (void); |
98 | |
99 | /* |
100 | * Set up power-on settings for the terminal. |
101 | */ |
102 | static void power_on(void) { |
103 | curs_x = curs_y = alt_x = alt_y = save_x = save_y = 0; |
104 | alt_t = marg_t = 0; |
105 | if (rows != -1) |
106 | alt_b = marg_b = rows - 1; |
107 | else |
108 | alt_b = marg_b = 0; |
109 | if (cols != -1) { |
110 | int i; |
111 | for (i = 0; i < cols; i++) |
112 | tabs[i] = (i % 8 == 0 ? TRUE : FALSE); |
113 | } |
114 | alt_om = dec_om = cfg.dec_om; |
115 | alt_wnext = wrapnext = alt_ins = insert = FALSE; |
116 | alt_wrap = wrap = cfg.wrap_mode; |
117 | alt_cset = cset = 0; |
118 | cset_attr[0] = cset_attr[1] = ATTR_ASCII; |
119 | rvideo = 0; |
120 | save_attr = curr_attr = ATTR_DEFAULT; |
121 | app_cursor_keys = cfg.app_cursor; |
122 | app_keypad_keys = cfg.app_keypad; |
123 | alt_which = 0; |
124 | { |
125 | int i; |
126 | for (i = 0; i < 256; i++) |
127 | wordness[i] = cfg.wordness[i]; |
128 | } |
129 | if (text) { |
130 | swap_screen (1); |
131 | erase_lots (FALSE, TRUE, TRUE); |
132 | swap_screen (0); |
133 | erase_lots (FALSE, TRUE, TRUE); |
134 | } |
135 | } |
136 | |
137 | /* |
138 | * Force a screen update. |
139 | */ |
140 | void term_update(void) { |
141 | Context ctx; |
142 | ctx = get_ctx(); |
143 | if (ctx) { |
144 | do_paint (ctx, TRUE); |
145 | free_ctx (ctx); |
146 | nl_count = 0; |
147 | scroll_heuristic = 0; |
148 | } |
149 | } |
150 | |
151 | /* |
152 | * Same as power_on(), but an external function. |
153 | */ |
154 | void term_pwron(void) { |
155 | power_on(); |
156 | fix_cpos; |
157 | disptop = scrtop; |
158 | deselect(); |
159 | term_update(); |
160 | } |
161 | |
162 | /* |
163 | * Clear the scrollback. |
164 | */ |
165 | void term_clrsb(void) { |
166 | disptop = sbtop = scrtop; |
167 | update_sbar(); |
168 | } |
169 | |
170 | /* |
171 | * Initialise the terminal. |
172 | */ |
173 | void term_init(void) { |
174 | text = sbtop = scrtop = disptop = cpos = NULL; |
175 | disptext = wanttext = NULL; |
176 | tabs = NULL; |
177 | selspace = NULL; |
178 | deselect(); |
179 | rows = cols = -1; |
180 | nl_count = 0; |
181 | power_on(); |
182 | } |
183 | |
184 | /* |
185 | * Set up the terminal for a given size. |
186 | */ |
187 | void term_size(int newrows, int newcols, int newsavelines) { |
188 | unsigned long *newtext, *newdisp, *newwant, *newalt; |
189 | int i, j, crows, ccols; |
190 | |
191 | if (newrows == rows && newcols == cols && newsavelines == savelines) |
192 | return; /* nothing to do */ |
193 | |
194 | alt_t = marg_t = 0; |
195 | alt_b = marg_b = newrows - 1; |
196 | |
197 | newtext = smalloc ((newrows+newsavelines)*(newcols+1)*TSIZE); |
198 | disptop = newtext + newsavelines*(newcols+1); |
199 | for (i=0; i<(newrows+newsavelines)*(newcols+1); i++) |
200 | newtext[i] = ERASE_CHAR; |
201 | if (rows != -1) { |
202 | crows = rows + (scrtop - sbtop) / (cols+1); |
203 | if (crows > newrows+newsavelines) |
204 | crows = newrows+newsavelines; |
205 | ccols = (cols < newcols ? cols : newcols); |
206 | for (i=0; i<crows; i++) { |
207 | int oldidx = (rows + savelines - crows + i) * (cols+1); |
208 | int newidx = (newrows + newsavelines - crows + i) * (newcols+1); |
209 | for (j=0; j<ccols; j++) |
210 | newtext[newidx+j] = text[oldidx+j]; |
211 | newtext[newidx+newcols] = |
212 | (cols == newcols ? text[oldidx+cols] : 0); |
213 | } |
214 | sbtop = disptop - (crows - newrows) * (newcols+1); |
215 | if (sbtop > disptop) |
216 | sbtop = disptop; |
217 | } else |
218 | sbtop = disptop; |
219 | scrtop = disptop; |
220 | sfree (text); |
221 | text = newtext; |
222 | |
223 | newdisp = smalloc (newrows*(newcols+1)*TSIZE); |
224 | for (i=0; i<newrows*(newcols+1); i++) |
225 | newdisp[i] = ATTR_INVALID; |
226 | sfree (disptext); |
227 | disptext = newdisp; |
228 | |
229 | newwant = smalloc (newrows*(newcols+1)*TSIZE); |
230 | for (i=0; i<newrows*(newcols+1); i++) |
231 | newwant[i] = ATTR_INVALID; |
232 | sfree (wanttext); |
233 | wanttext = newwant; |
234 | |
235 | newalt = smalloc (newrows*(newcols+1)*TSIZE); |
236 | for (i=0; i<newrows*(newcols+1); i++) |
237 | newalt[i] = ERASE_CHAR; |
238 | sfree (alttext); |
239 | alttext = newalt; |
240 | |
241 | sfree (selspace); |
242 | selspace = smalloc ( (newrows+newsavelines) * (newcols+sizeof(sel_nl)) ); |
243 | |
244 | tabs = srealloc (tabs, newcols*sizeof(*tabs)); |
245 | { |
246 | int i; |
247 | for (i = (cols > 0 ? cols : 0); i < newcols; i++) |
248 | tabs[i] = (i % 8 == 0 ? TRUE : FALSE); |
249 | } |
250 | |
251 | if (rows > 0) |
252 | curs_y += newrows - rows; |
253 | if (curs_y < 0) |
254 | curs_y = 0; |
255 | if (curs_y >= newrows) |
256 | curs_y = newrows-1; |
257 | if (curs_x >= newcols) |
258 | curs_x = newcols-1; |
259 | alt_x = alt_y = 0; |
260 | wrapnext = alt_wnext = FALSE; |
261 | |
262 | rows = newrows; |
263 | cols = newcols; |
264 | savelines = newsavelines; |
265 | fix_cpos; |
266 | |
267 | deselect(); |
268 | update_sbar(); |
269 | term_update(); |
270 | } |
271 | |
272 | /* |
273 | * Swap screens. |
274 | */ |
275 | static void swap_screen (int which) { |
276 | int t; |
277 | unsigned long tt; |
278 | |
279 | if (which == alt_which) |
280 | return; |
281 | |
282 | alt_which = which; |
283 | |
284 | for (t=0; t<rows*(cols+1); t++) { |
285 | tt = scrtop[t]; scrtop[t] = alttext[t]; alttext[t] = tt; |
286 | } |
287 | |
288 | t = curs_x; curs_x = alt_x; alt_x = t; |
289 | t = curs_y; curs_y = alt_y; alt_y = t; |
290 | t = marg_t; marg_t = alt_t; alt_t = t; |
291 | t = marg_b; marg_b = alt_b; alt_b = t; |
292 | t = dec_om; dec_om = alt_om; alt_om = t; |
293 | t = wrap; wrap = alt_wrap; alt_wrap = t; |
294 | t = wrapnext; wrapnext = alt_wnext; alt_wnext = t; |
295 | t = insert; insert = alt_ins; alt_ins = t; |
296 | t = cset; cset = alt_cset; alt_cset = t; |
297 | |
298 | fix_cpos; |
299 | } |
300 | |
301 | /* |
302 | * Retrieve a character from `inbuf'. |
303 | */ |
304 | static int inbuf_getc(void) { |
305 | if (inbuf_head == inbuf_reap) |
306 | return -1; /* EOF */ |
307 | else { |
308 | int n = inbuf_reap; |
309 | inbuf_reap = (inbuf_reap+1) & INBUF_MASK; |
310 | return inbuf[n]; |
311 | } |
312 | } |
313 | |
314 | /* |
315 | * Update the scroll bar. |
316 | */ |
317 | static void update_sbar(void) { |
318 | int min; |
319 | |
320 | min = (sbtop - text) / (cols+1); |
321 | set_sbar ((scrtop - text) / (cols+1) + rows - min, |
322 | (disptop - text) / (cols+1) - min, |
323 | rows); |
324 | } |
325 | |
326 | /* |
327 | * Check whether the region bounded by the two pointers intersects |
328 | * the scroll region, and de-select the on-screen selection if so. |
329 | */ |
330 | static void check_selection (unsigned long *from, unsigned long *to) { |
331 | if (from < selend && selstart < to) |
332 | deselect(); |
333 | } |
334 | |
335 | /* |
336 | * Scroll the screen. (`lines' is +ve for scrolling forward, -ve |
337 | * for backward.) `sb' is TRUE if the scrolling is permitted to |
338 | * affect the scrollback buffer. |
339 | */ |
340 | static void scroll (int topline, int botline, int lines, int sb) { |
341 | unsigned long *scroll_top; |
342 | int scroll_size, size, i; |
343 | |
344 | scroll_top = scrtop + topline*(cols+1); |
345 | size = (lines < 0 ? -lines : lines) * (cols+1); |
346 | scroll_size = (botline - topline + 1) * (cols+1) - size; |
347 | |
348 | if (lines > 0 && topline == 0 && botline == (rows-1) && sb) { |
349 | /* |
350 | * Since we're going to scroll the whole screen upwards, |
351 | * let's also affect the scrollback buffer. |
352 | */ |
353 | sbtop -= lines * (cols+1); |
354 | if (sbtop < text) |
355 | sbtop = text; |
356 | scroll_size += scroll_top - sbtop; |
357 | scroll_top = sbtop; |
358 | update_sbar(); |
359 | } |
360 | |
361 | if (scroll_size < 0) { |
362 | size += scroll_size; |
363 | scroll_size = 0; |
364 | } |
365 | |
366 | if (lines > 0) { |
367 | if (scroll_size) |
368 | memmove (scroll_top, scroll_top + size, scroll_size*TSIZE); |
369 | for (i = 0; i < size; i++) |
370 | scroll_top[i+scroll_size] = ERASE_CHAR; |
371 | if (selstart > scroll_top && |
372 | selstart < scroll_top + size + scroll_size) { |
373 | selstart -= size; |
374 | if (selstart < scroll_top) |
375 | selstart = scroll_top; |
376 | } |
377 | if (selend > scroll_top && |
378 | selend < scroll_top + size + scroll_size) { |
379 | selend -= size; |
380 | if (selend < scroll_top) |
381 | selend = scroll_top; |
382 | } |
383 | } else { |
384 | if (scroll_size) |
385 | memmove (scroll_top + size, scroll_top, scroll_size*TSIZE); |
386 | for (i = 0; i < size; i++) |
387 | scroll_top[i] = ERASE_CHAR; |
388 | if (selstart > scroll_top && |
389 | selstart < scroll_top + size + scroll_size) { |
390 | selstart += size; |
391 | if (selstart > scroll_top + size + scroll_size) |
392 | selstart = scroll_top + size + scroll_size; |
393 | } |
394 | if (selend > scroll_top && |
395 | selend < scroll_top + size + scroll_size) { |
396 | selend += size; |
397 | if (selend > scroll_top + size + scroll_size) |
398 | selend = scroll_top + size + scroll_size; |
399 | } |
400 | } |
401 | |
402 | scroll_heuristic += lines; |
403 | } |
404 | |
405 | /* |
406 | * Move the cursor to a given position, clipping at boundaries. We |
407 | * may or may not want to clip at the scroll margin: marg_clip is 0 |
408 | * not to, 1 to disallow _passing_ the margins, and 2 to disallow |
409 | * even _being_ outside the margins. |
410 | */ |
411 | static void move (int x, int y, int marg_clip) { |
412 | if (x < 0) |
413 | x = 0; |
414 | if (x >= cols) |
415 | x = cols-1; |
416 | if (marg_clip) { |
417 | if ((curs_y >= marg_t || marg_clip == 2) && y < marg_t) |
418 | y = marg_t; |
419 | if ((curs_y <= marg_b || marg_clip == 2) && y > marg_b) |
420 | y = marg_b; |
421 | } |
422 | if (y < 0) |
423 | y = 0; |
424 | if (y >= rows) |
425 | y = rows-1; |
426 | curs_x = x; |
427 | curs_y = y; |
428 | fix_cpos; |
429 | wrapnext = FALSE; |
430 | } |
431 | |
432 | /* |
433 | * Save or restore the cursor and SGR mode. |
434 | */ |
435 | static void save_cursor(int save) { |
436 | if (save) { |
437 | save_x = curs_x; |
438 | save_y = curs_y; |
439 | save_attr = curr_attr; |
440 | save_cset = cset; |
441 | save_csattr = cset_attr[cset]; |
442 | } else { |
443 | curs_x = save_x; |
444 | curs_y = save_y; |
445 | curr_attr = save_attr; |
446 | cset = save_cset; |
447 | cset_attr[cset] = save_csattr; |
448 | fix_cpos; |
449 | } |
450 | } |
451 | |
452 | /* |
453 | * Erase a large portion of the screen: the whole screen, or the |
454 | * whole line, or parts thereof. |
455 | */ |
456 | static void erase_lots (int line_only, int from_begin, int to_end) { |
457 | unsigned long *startpos, *endpos; |
458 | |
459 | if (line_only) { |
460 | startpos = cpos - curs_x; |
461 | endpos = startpos + cols+1; |
462 | } else { |
463 | startpos = scrtop; |
464 | endpos = startpos + rows * (cols+1); |
465 | } |
466 | if (!from_begin) |
467 | startpos = cpos; |
468 | if (!to_end) |
469 | endpos = cpos; |
470 | check_selection (startpos, endpos); |
471 | while (startpos < endpos) |
472 | *startpos++ = ERASE_CHAR; |
473 | } |
474 | |
475 | /* |
476 | * Insert or delete characters within the current line. n is +ve if |
477 | * insertion is desired, and -ve for deletion. |
478 | */ |
479 | static void insch (int n) { |
480 | int dir = (n < 0 ? -1 : +1); |
481 | int m; |
482 | |
483 | n = (n < 0 ? -n : n); |
484 | if (n > cols - curs_x) |
485 | n = cols - curs_x; |
486 | m = cols - curs_x - n; |
487 | check_selection (cpos, cpos+n); |
488 | if (dir < 0) { |
489 | memmove (cpos, cpos+n, m*TSIZE); |
490 | while (n--) |
491 | cpos[m++] = ERASE_CHAR; |
492 | } else { |
493 | memmove (cpos+n, cpos, m*TSIZE); |
494 | while (n--) |
495 | cpos[n] = ERASE_CHAR; |
496 | } |
497 | } |
498 | |
499 | /* |
500 | * Toggle terminal mode `mode' to state `state'. (`query' indicates |
501 | * whether the mode is a DEC private one or a normal one.) |
502 | */ |
503 | static void toggle_mode (int mode, int query, int state) { |
504 | if (query) switch (mode) { |
505 | case 1: /* application cursor keys */ |
506 | app_cursor_keys = state; |
507 | break; |
508 | case 3: /* 80/132 columns */ |
509 | deselect(); |
510 | request_resize (state ? 132 : 80, rows); |
511 | break; |
512 | case 5: /* reverse video */ |
513 | rvideo = state; |
514 | disptop = scrtop; |
515 | break; |
516 | case 6: /* DEC origin mode */ |
517 | dec_om = state; |
518 | break; |
519 | case 7: /* auto wrap */ |
520 | wrap = state; |
521 | break; |
522 | case 47: /* alternate screen */ |
523 | deselect(); |
524 | swap_screen (state); |
525 | disptop = scrtop; |
526 | break; |
527 | } else switch (mode) { |
528 | case 4: /* set insert mode */ |
529 | insert = state; |
530 | break; |
531 | } |
532 | } |
533 | |
534 | /* |
535 | * Process an OSC sequence: set window title or icon name. |
536 | */ |
537 | static void do_osc(void) { |
538 | if (osc_w) { |
539 | while (osc_strlen--) |
540 | wordness[(unsigned char)osc_string[osc_strlen]] = esc_args[0]; |
541 | } else { |
542 | osc_string[osc_strlen] = '\0'; |
543 | switch (esc_args[0]) { |
544 | case 0: |
545 | case 1: |
546 | set_icon (osc_string); |
547 | if (esc_args[0] == 1) |
548 | break; |
549 | /* fall through: parameter 0 means set both */ |
550 | case 2: |
551 | case 21: |
552 | set_title (osc_string); |
553 | break; |
554 | } |
555 | } |
556 | } |
557 | |
558 | /* |
559 | * Remove everything currently in `inbuf' and stick it up on the |
560 | * in-memory display. There's a big state machine in here to |
561 | * process escape sequences... |
562 | */ |
563 | void term_out(void) { |
564 | int c; |
565 | int must_update = FALSE; |
566 | |
567 | while ( (c = inbuf_getc()) != -1) { |
568 | #ifdef LOG |
569 | { |
570 | static FILE *fp = NULL; |
571 | if (!fp) fp = fopen("putty.log", "wb"); |
572 | if (fp) fputc (c, fp); |
573 | } |
574 | #endif |
575 | switch (termstate) { |
576 | case TOPLEVEL: |
577 | do_toplevel: |
578 | switch (c) { |
579 | case '\005': /* terminal type query */ |
580 | back->send ("\033[?1;2c", 7); |
581 | break; |
582 | case '\007': |
583 | beep(); |
584 | disptop = scrtop; |
585 | must_update = TRUE; |
586 | break; |
587 | case '\b': |
588 | if (curs_x == 0 && curs_y > 0) |
589 | curs_x = cols-1, curs_y--; |
590 | else if (wrapnext) |
591 | wrapnext = FALSE; |
592 | else |
593 | curs_x--; |
594 | fix_cpos; |
595 | disptop = scrtop; |
596 | must_update = TRUE; |
597 | break; |
598 | case '\016': |
599 | cset = 1; |
600 | break; |
601 | case '\017': |
602 | cset = 0; |
603 | break; |
604 | case '\033': |
605 | termstate = SEEN_ESC; |
606 | break; |
607 | case 0233: |
608 | termstate = SEEN_CSI; |
609 | esc_nargs = 1; |
610 | esc_args[0] = ARG_DEFAULT; |
611 | esc_query = FALSE; |
612 | break; |
613 | case 0235: |
614 | termstate = SEEN_OSC; |
615 | esc_args[0] = 0; |
616 | break; |
617 | case '\r': |
618 | curs_x = 0; |
619 | wrapnext = FALSE; |
620 | fix_cpos; |
621 | disptop = scrtop; |
622 | must_update = TRUE; |
623 | break; |
624 | case '\013': |
625 | case '\014': |
626 | case '\n': |
627 | if (curs_y == marg_b) |
628 | scroll (marg_t, marg_b, 1, TRUE); |
629 | else if (curs_y < rows-1) |
630 | curs_y++; |
631 | fix_cpos; |
632 | wrapnext = FALSE; |
633 | disptop = scrtop; |
634 | nl_count++; |
635 | break; |
636 | case '\t': |
637 | do { |
638 | curs_x++; |
639 | } while (curs_x < cols-1 && !tabs[curs_x]); |
640 | if (curs_x >= cols) |
641 | curs_x = cols-1; |
642 | { |
643 | unsigned long *old_cpos = cpos; |
644 | fix_cpos; |
645 | check_selection (old_cpos, cpos); |
646 | } |
647 | disptop = scrtop; |
648 | must_update = TRUE; |
649 | break; |
650 | default: |
651 | if (c >= ' ' && c != 0234) { |
652 | if (wrapnext) { |
653 | cpos[1] = ATTR_WRAPPED; |
654 | if (curs_y == marg_b) |
655 | scroll (marg_t, marg_b, 1, TRUE); |
656 | else if (curs_y < rows-1) |
657 | curs_y++; |
658 | curs_x = 0; |
659 | fix_cpos; |
660 | wrapnext = FALSE; |
661 | nl_count++; |
662 | } |
663 | if (insert) |
664 | insch (1); |
665 | check_selection (cpos, cpos+1); |
666 | *cpos++ = c | curr_attr | |
667 | (c <= 0x7F ? cset_attr[cset] : ATTR_ASCII); |
668 | curs_x++; |
669 | if (curs_x == cols) { |
670 | cpos--; |
671 | curs_x--; |
672 | wrapnext = wrap; |
673 | } |
674 | disptop = scrtop; |
675 | } |
676 | } |
677 | break; |
678 | case IGNORE_NEXT: |
679 | termstate = TOPLEVEL; |
680 | break; |
681 | case OSC_MAYBE_ST: |
682 | /* |
683 | * This state is virtually identical to SEEN_ESC, with the |
684 | * exception that we have an OSC sequence in the pipeline, |
685 | * and _if_ we see a backslash, we process it. |
686 | */ |
687 | if (c == '\\') { |
688 | do_osc(); |
689 | termstate = TOPLEVEL; |
690 | break; |
691 | } |
692 | /* else fall through */ |
693 | case SEEN_ESC: |
694 | termstate = TOPLEVEL; |
695 | switch (c) { |
696 | case '\005': case '\007': case '\b': case '\016': case '\017': |
697 | case '\033': case 0233: case 0234: case 0235: case '\r': |
698 | case '\013': case '\014': case '\n': case '\t': |
699 | termstate = TOPLEVEL; |
700 | goto do_toplevel; /* hack... */ |
701 | case ' ': /* some weird sequence? */ |
702 | termstate = IGNORE_NEXT; |
703 | break; |
704 | case '[': /* enter CSI mode */ |
705 | termstate = SEEN_CSI; |
706 | esc_nargs = 1; |
707 | esc_args[0] = ARG_DEFAULT; |
708 | esc_query = FALSE; |
709 | break; |
710 | case ']': /* xterm escape sequences */ |
711 | termstate = SEEN_OSC; |
712 | esc_args[0] = 0; |
713 | break; |
714 | case '(': /* should set GL */ |
715 | termstate = SET_GL; |
716 | break; |
717 | case ')': /* should set GR */ |
718 | termstate = SET_GR; |
719 | break; |
720 | case '7': /* save cursor */ |
721 | save_cursor (TRUE); |
722 | break; |
723 | case '8': /* restore cursor */ |
724 | save_cursor (FALSE); |
725 | disptop = scrtop; |
726 | must_update = TRUE; |
727 | break; |
728 | case '=': |
729 | app_keypad_keys = TRUE; |
730 | break; |
731 | case '>': |
732 | app_keypad_keys = FALSE; |
733 | break; |
734 | case 'D': /* exactly equivalent to LF */ |
735 | if (curs_y == marg_b) |
736 | scroll (marg_t, marg_b, 1, TRUE); |
737 | else if (curs_y < rows-1) |
738 | curs_y++; |
739 | fix_cpos; |
740 | wrapnext = FALSE; |
741 | disptop = scrtop; |
742 | nl_count++; |
743 | break; |
744 | case 'E': /* exactly equivalent to CR-LF */ |
745 | curs_x = 0; |
746 | wrapnext = FALSE; |
747 | if (curs_y == marg_b) |
748 | scroll (marg_t, marg_b, 1, TRUE); |
749 | else if (curs_y < rows-1) |
750 | curs_y++; |
751 | fix_cpos; |
752 | wrapnext = FALSE; |
753 | nl_count++; |
754 | disptop = scrtop; |
755 | break; |
756 | case 'M': /* reverse index - backwards LF */ |
757 | if (curs_y == marg_t) |
758 | scroll (marg_t, marg_b, -1, TRUE); |
759 | else if (curs_y > 0) |
760 | curs_y--; |
761 | fix_cpos; |
762 | wrapnext = FALSE; |
763 | disptop = scrtop; |
764 | must_update = TRUE; |
765 | break; |
766 | case 'Z': /* terminal type query */ |
767 | back->send ("\033[?6c", 5); |
768 | break; |
769 | case 'c': /* restore power-on settings */ |
770 | power_on(); |
771 | fix_cpos; |
772 | disptop = scrtop; |
773 | must_update = TRUE; |
774 | break; |
775 | case '#': /* ESC # 8 fills screen with Es :-) */ |
776 | termstate = SEEN_ESCHASH; |
777 | break; |
778 | case 'H': /* set a tab */ |
779 | tabs[curs_x] = TRUE; |
780 | break; |
781 | } |
782 | break; |
783 | case SEEN_CSI: |
784 | termstate = TOPLEVEL; /* default */ |
785 | switch (c) { |
786 | case '\005': case '\007': case '\b': case '\016': case '\017': |
787 | case '\033': case 0233: case 0234: case 0235: case '\r': |
788 | case '\013': case '\014': case '\n': case '\t': |
789 | termstate = TOPLEVEL; |
790 | goto do_toplevel; /* hack... */ |
791 | case '0': case '1': case '2': case '3': case '4': |
792 | case '5': case '6': case '7': case '8': case '9': |
793 | if (esc_nargs <= ARGS_MAX) { |
794 | if (esc_args[esc_nargs-1] == ARG_DEFAULT) |
795 | esc_args[esc_nargs-1] = 0; |
796 | esc_args[esc_nargs-1] = |
797 | 10 * esc_args[esc_nargs-1] + c - '0'; |
798 | } |
799 | termstate = SEEN_CSI; |
800 | break; |
801 | case ';': |
802 | if (++esc_nargs <= ARGS_MAX) |
803 | esc_args[esc_nargs-1] = ARG_DEFAULT; |
804 | termstate = SEEN_CSI; |
805 | break; |
806 | case '?': |
807 | esc_query = TRUE; |
808 | termstate = SEEN_CSI; |
809 | break; |
810 | case 'A': /* move up N lines */ |
811 | move (curs_x, curs_y - def(esc_args[0], 1), 1); |
812 | disptop = scrtop; |
813 | must_update = TRUE; |
814 | break; |
815 | case 'B': case 'e': /* move down N lines */ |
816 | move (curs_x, curs_y + def(esc_args[0], 1), 1); |
817 | disptop = scrtop; |
818 | must_update = TRUE; |
819 | break; |
820 | case 'C': case 'a': /* move right N cols */ |
821 | move (curs_x + def(esc_args[0], 1), curs_y, 1); |
822 | disptop = scrtop; |
823 | must_update = TRUE; |
824 | break; |
825 | case 'D': /* move left N cols */ |
826 | move (curs_x - def(esc_args[0], 1), curs_y, 1); |
827 | disptop = scrtop; |
828 | must_update = TRUE; |
829 | break; |
830 | case 'E': /* move down N lines and CR */ |
831 | move (0, curs_y + def(esc_args[0], 1), 1); |
832 | disptop = scrtop; |
833 | must_update = TRUE; |
834 | break; |
835 | case 'F': /* move up N lines and CR */ |
836 | move (0, curs_y - def(esc_args[0], 1), 1); |
837 | disptop = scrtop; |
838 | must_update = TRUE; |
839 | break; |
840 | case 'G': case '`': /* set horizontal posn */ |
841 | move (def(esc_args[0], 1) - 1, curs_y, 0); |
842 | disptop = scrtop; |
843 | must_update = TRUE; |
844 | break; |
845 | case 'd': /* set vertical posn */ |
846 | move (curs_x, (dec_om ? marg_t : 0) + def(esc_args[0], 1) - 1, |
847 | (dec_om ? 2 : 0)); |
848 | disptop = scrtop; |
849 | must_update = TRUE; |
850 | break; |
851 | case 'H': case 'f': /* set horz and vert posns at once */ |
852 | if (esc_nargs < 2) |
853 | esc_args[1] = ARG_DEFAULT; |
854 | move (def(esc_args[1], 1) - 1, |
855 | (dec_om ? marg_t : 0) + def(esc_args[0], 1) - 1, |
856 | (dec_om ? 2 : 0)); |
857 | disptop = scrtop; |
858 | must_update = TRUE; |
859 | break; |
860 | case 'J': /* erase screen or parts of it */ |
861 | { |
862 | unsigned int i = def(esc_args[0], 0) + 1; |
863 | if (i > 3) |
864 | i = 0; |
865 | erase_lots(FALSE, !!(i & 2), !!(i & 1)); |
866 | } |
867 | disptop = scrtop; |
868 | must_update = TRUE; |
869 | break; |
870 | case 'K': /* erase line or parts of it */ |
871 | { |
872 | unsigned int i = def(esc_args[0], 0) + 1; |
873 | if (i > 3) |
874 | i = 0; |
875 | erase_lots(TRUE, !!(i & 2), !!(i & 1)); |
876 | } |
877 | disptop = scrtop; |
878 | must_update = TRUE; |
879 | break; |
880 | case 'L': /* insert lines */ |
881 | if (curs_y <= marg_b) |
882 | scroll (curs_y, marg_b, -def(esc_args[0], 1), FALSE); |
883 | disptop = scrtop; |
884 | must_update = TRUE; |
885 | break; |
886 | case 'M': /* delete lines */ |
887 | if (curs_y <= marg_b) |
888 | scroll (curs_y, marg_b, def(esc_args[0], 1), FALSE); |
889 | disptop = scrtop; |
890 | must_update = TRUE; |
891 | break; |
892 | case '@': /* insert chars */ |
893 | insch (def(esc_args[0], 1)); |
894 | disptop = scrtop; |
895 | must_update = TRUE; |
896 | break; |
897 | case 'P': /* delete chars */ |
898 | insch (-def(esc_args[0], 1)); |
899 | disptop = scrtop; |
900 | must_update = TRUE; |
901 | break; |
902 | case 'c': /* terminal type query */ |
903 | back->send ("\033[?6c", 5); |
904 | break; |
905 | case 'n': /* cursor position query */ |
906 | if (esc_args[0] == 6) { |
907 | char buf[32]; |
908 | sprintf (buf, "\033[%d;%dR", curs_y + 1, curs_x + 1); |
909 | back->send (buf, strlen(buf)); |
910 | } |
911 | break; |
912 | case 'h': /* toggle a mode to high */ |
913 | toggle_mode (esc_args[0], esc_query, TRUE); |
914 | break; |
915 | case 'l': /* toggle a mode to low */ |
916 | toggle_mode (esc_args[0], esc_query, FALSE); |
917 | break; |
918 | case 'g': /* clear tabs */ |
919 | if (esc_nargs == 1) { |
920 | if (esc_args[0] == 0) { |
921 | tabs[curs_x] = FALSE; |
922 | } else if (esc_args[0] == 3) { |
923 | int i; |
924 | for (i = 0; i < cols; i++) |
925 | tabs[i] = FALSE; |
926 | } |
927 | } |
928 | break; |
929 | case 'r': /* set scroll margins */ |
930 | if (esc_nargs <= 2) { |
931 | int top, bot; |
932 | top = def(esc_args[0], 1) - 1; |
933 | if (top < 0) |
934 | top = 0; |
935 | bot = (esc_nargs == 1 ? rows : |
936 | def(esc_args[1], rows)) - 1; |
937 | if (bot >= rows) |
938 | bot = rows-1; |
939 | if (top <= bot) { |
940 | marg_t = top; |
941 | marg_b = bot; |
942 | curs_x = 0; |
943 | /* |
944 | * I used to think the cursor should be |
945 | * placed at the top of the newly marginned |
946 | * area. Apparently not: VMS TPU falls over |
947 | * if so. |
948 | */ |
949 | curs_y = 0; |
950 | fix_cpos; |
951 | disptop = scrtop; |
952 | must_update = TRUE; |
953 | } |
954 | } |
955 | break; |
956 | case 'm': /* set graphics rendition */ |
957 | { |
958 | int i; |
959 | for (i=0; i<esc_nargs; i++) { |
960 | switch (def(esc_args[i], 0)) { |
961 | case 0: /* restore defaults */ |
962 | curr_attr = ATTR_DEFAULT; break; |
963 | case 1: /* enable bold */ |
964 | curr_attr |= ATTR_BOLD; break; |
965 | case 4: /* enable underline */ |
966 | case 21: /* (enable double underline) */ |
967 | curr_attr |= ATTR_UNDER; break; |
968 | case 7: /* enable reverse video */ |
969 | curr_attr |= ATTR_REVERSE; break; |
970 | case 22: /* disable bold */ |
971 | curr_attr &= ~ATTR_BOLD; break; |
972 | case 24: /* disable underline */ |
973 | curr_attr &= ~ATTR_UNDER; break; |
974 | case 27: /* disable reverse video */ |
975 | curr_attr &= ~ATTR_REVERSE; break; |
976 | case 30: case 31: case 32: case 33: |
977 | case 34: case 35: case 36: case 37: |
978 | /* foreground */ |
979 | curr_attr &= ~ATTR_FGMASK; |
980 | curr_attr |= (esc_args[i] - 30) << ATTR_FGSHIFT; |
981 | break; |
982 | case 39: /* default-foreground */ |
983 | curr_attr &= ~ATTR_FGMASK; |
984 | curr_attr |= ATTR_DEFFG; |
985 | break; |
986 | case 40: case 41: case 42: case 43: |
987 | case 44: case 45: case 46: case 47: |
988 | /* background */ |
989 | curr_attr &= ~ATTR_BGMASK; |
990 | curr_attr |= (esc_args[i] - 40) << ATTR_BGSHIFT; |
991 | break; |
992 | case 49: /* default-background */ |
993 | curr_attr &= ~ATTR_BGMASK; |
994 | curr_attr |= ATTR_DEFBG; |
995 | break; |
996 | } |
997 | } |
998 | } |
999 | break; |
1000 | case 's': /* save cursor */ |
1001 | save_cursor (TRUE); |
1002 | break; |
1003 | case 'u': /* restore cursor */ |
1004 | save_cursor (FALSE); |
1005 | disptop = scrtop; |
1006 | must_update = TRUE; |
1007 | break; |
1008 | case 't': /* set page size - ie window height */ |
1009 | request_resize (cols, def(esc_args[0], 24)); |
1010 | deselect(); |
1011 | break; |
1012 | case 'X': /* write N spaces w/o moving cursor */ |
1013 | { |
1014 | int n = def(esc_args[0], 1); |
1015 | unsigned long *p = cpos; |
1016 | if (n > cols - curs_x) |
1017 | n = cols - curs_x; |
1018 | check_selection (cpos, cpos+n); |
1019 | while (n--) |
1020 | *p++ = ERASE_CHAR; |
1021 | disptop = scrtop; |
1022 | must_update = TRUE; |
1023 | } |
1024 | break; |
1025 | case 'x': /* report terminal characteristics */ |
1026 | { |
1027 | char buf[32]; |
1028 | int i = def(esc_args[0], 0); |
1029 | if (i == 0 || i == 1) { |
1030 | strcpy (buf, "\033[2;1;1;112;112;1;0x"); |
1031 | buf[2] += i; |
1032 | back->send (buf, 20); |
1033 | } |
1034 | } |
1035 | break; |
1036 | } |
1037 | break; |
1038 | case SET_GL: |
1039 | case SET_GR: |
1040 | switch (c) { |
1041 | case 'A': |
1042 | cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_GBCHR; |
1043 | break; |
1044 | case '0': |
1045 | cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_LINEDRW; |
1046 | break; |
1047 | default: /* specifically, 'B' */ |
1048 | cset_attr[termstate == SET_GL ? 0 : 1] = ATTR_ASCII; |
1049 | break; |
1050 | } |
1051 | termstate = TOPLEVEL; |
1052 | break; |
1053 | case SEEN_OSC: |
1054 | osc_w = FALSE; |
1055 | switch (c) { |
1056 | case '\005': case '\007': case '\b': case '\016': case '\017': |
1057 | case '\033': case 0233: case 0234: case 0235: case '\r': |
1058 | case '\013': case '\014': case '\n': case '\t': |
1059 | termstate = TOPLEVEL; |
1060 | goto do_toplevel; /* hack... */ |
1061 | case 'P': /* Linux palette sequence */ |
1062 | termstate = SEEN_OSC_P; |
1063 | osc_strlen = 0; |
1064 | break; |
1065 | case 'R': /* Linux palette reset */ |
1066 | palette_reset(); |
1067 | term_invalidate(); |
1068 | termstate = TOPLEVEL; |
1069 | break; |
1070 | case 'W': /* word-set */ |
1071 | termstate = SEEN_OSC_W; |
1072 | osc_w = TRUE; |
1073 | break; |
1074 | case '0': case '1': case '2': case '3': case '4': |
1075 | case '5': case '6': case '7': case '8': case '9': |
1076 | esc_args[0] = 10 * esc_args[0] + c - '0'; |
1077 | break; |
1078 | case 'L': |
1079 | /* |
1080 | * Grotty hack to support xterm and DECterm title |
1081 | * sequences concurrently. |
1082 | */ |
1083 | if (esc_args[0] == 2) { |
1084 | esc_args[0] = 1; |
1085 | break; |
1086 | } |
1087 | /* else fall through */ |
1088 | default: |
1089 | termstate = OSC_STRING; |
1090 | osc_strlen = 0; |
1091 | } |
1092 | break; |
1093 | case OSC_STRING: |
1094 | if (c == 0234 || c == '\007') { |
1095 | /* |
1096 | * These characters terminate the string; ST and BEL |
1097 | * terminate the sequence and trigger instant |
1098 | * processing of it, whereas ESC goes back to SEEN_ESC |
1099 | * mode unless it is followed by \, in which case it is |
1100 | * synonymous with ST in the first place. |
1101 | */ |
1102 | do_osc(); |
1103 | termstate = TOPLEVEL; |
1104 | } else if (c == '\033') |
1105 | termstate = OSC_MAYBE_ST; |
1106 | else if (osc_strlen < OSC_STR_MAX) |
1107 | osc_string[osc_strlen++] = c; |
1108 | break; |
1109 | case SEEN_OSC_P: |
1110 | { |
1111 | int max = (osc_strlen == 0 ? 21 : 16); |
1112 | int val; |
1113 | if (c >= '0' && c <= '9') |
1114 | val = c - '0'; |
1115 | else if (c >= 'A' && c <= 'A'+max-10) |
1116 | val = c - 'A' + 10; |
1117 | else if (c >= 'a' && c <= 'a'+max-10) |
1118 | val = c - 'a' + 10; |
1119 | else |
1120 | termstate = TOPLEVEL; |
1121 | osc_string[osc_strlen++] = val; |
1122 | if (osc_strlen >= 7) { |
1123 | palette_set (osc_string[0], |
1124 | osc_string[1] * 16 + osc_string[2], |
1125 | osc_string[3] * 16 + osc_string[4], |
1126 | osc_string[5] * 16 + osc_string[6]); |
1127 | term_invalidate(); |
1128 | termstate = TOPLEVEL; |
1129 | } |
1130 | } |
1131 | break; |
1132 | case SEEN_OSC_W: |
1133 | switch (c) { |
1134 | case '\005': case '\007': case '\b': case '\016': case '\017': |
1135 | case '\033': case 0233: case 0234: case 0235: case '\r': |
1136 | case '\013': case '\014': case '\n': case '\t': |
1137 | termstate = TOPLEVEL; |
1138 | goto do_toplevel; /* hack... */ |
1139 | case '0': case '1': case '2': case '3': case '4': |
1140 | case '5': case '6': case '7': case '8': case '9': |
1141 | esc_args[0] = 10 * esc_args[0] + c - '0'; |
1142 | break; |
1143 | default: |
1144 | termstate = OSC_STRING; |
1145 | osc_strlen = 0; |
1146 | } |
1147 | break; |
1148 | case SEEN_ESCHASH: |
1149 | if (c == '8') { |
1150 | unsigned long *p = scrtop; |
1151 | int n = rows * (cols+1); |
1152 | while (n--) |
1153 | *p++ = ATTR_DEFAULT | 'E'; |
1154 | disptop = scrtop; |
1155 | must_update = TRUE; |
1156 | check_selection (scrtop, scrtop + rows * (cols+1)); |
1157 | } |
1158 | termstate = TOPLEVEL; |
1159 | break; |
1160 | } |
1161 | check_selection (cpos, cpos+1); |
1162 | } |
1163 | |
1164 | if (must_update || nl_count > MAXNL) |
1165 | term_update(); |
1166 | } |
1167 | |
1168 | /* |
1169 | * Compare two lines to determine whether they are sufficiently |
1170 | * alike to scroll-optimise one to the other. Return the degree of |
1171 | * similarity. |
1172 | */ |
1173 | static int linecmp (unsigned long *a, unsigned long *b) { |
1174 | int i, n; |
1175 | |
1176 | for (i=n=0; i < cols; i++) |
1177 | n += (*a++ == *b++); |
1178 | return n; |
1179 | } |
1180 | |
1181 | /* |
1182 | * Given a context, update the window. Out of paranoia, we don't |
1183 | * allow WM_PAINT responses to do scrolling optimisations. |
1184 | */ |
1185 | static void do_paint (Context ctx, int may_optimise){ |
1186 | int i, j, start, our_curs_y; |
1187 | unsigned long attr, rv, cursor; |
1188 | char ch[1024]; |
1189 | |
1190 | cursor = (has_focus ? ATTR_ACTCURS : ATTR_PASCURS); |
1191 | rv = (rvideo ? ATTR_REVERSE : 0); |
1192 | our_curs_y = curs_y + (scrtop - disptop) / (cols+1); |
1193 | |
1194 | for (i=0; i<rows; i++) { |
1195 | int idx = i*(cols+1); |
1196 | for (j=0; j<=cols; j++,idx++) { |
1197 | unsigned long *d = disptop+idx; |
1198 | wanttext[idx] = ((*d ^ rv |
1199 | ^ (selstart <= d && d < selend ? |
1200 | ATTR_REVERSE : 0)) | |
1201 | (i==our_curs_y && j==curs_x ? cursor : 0)); |
1202 | } |
1203 | } |
1204 | |
1205 | /* |
1206 | * We would perform scrolling optimisations in here, if they |
1207 | * didn't have a nasty tendency to cause the whole sodding |
1208 | * program to hang for a second at speed-critical moments. |
1209 | * We'll leave it well alone... |
1210 | */ |
1211 | |
1212 | for (i=0; i<rows; i++) { |
1213 | int idx = i*(cols+1); |
1214 | start = -1; |
1215 | for (j=0; j<=cols; j++,idx++) { |
1216 | unsigned long t = wanttext[idx]; |
1217 | int needs_update = (j < cols && t != disptext[idx]); |
1218 | int keep_going = (start != -1 && needs_update && |
1219 | (t & ATTR_MASK) == attr && |
1220 | j-start < sizeof(ch)); |
1221 | if (start != -1 && !keep_going) { |
1222 | do_text (ctx, start, i, ch, j-start, attr); |
1223 | start = -1; |
1224 | } |
1225 | if (needs_update) { |
1226 | if (start == -1) { |
1227 | start = j; |
1228 | attr = t & ATTR_MASK; |
1229 | } |
1230 | ch[j-start] = (char) (t & CHAR_MASK); |
1231 | } |
1232 | disptext[idx] = t; |
1233 | } |
1234 | } |
1235 | } |
1236 | |
1237 | /* |
1238 | * Invalidate the whole screen so it will be repainted in full. |
1239 | */ |
1240 | void term_invalidate(void) { |
1241 | int i; |
1242 | |
1243 | for (i=0; i<rows*(cols+1); i++) |
1244 | disptext[i] = ATTR_INVALID; |
1245 | } |
1246 | |
1247 | /* |
1248 | * Paint the window in response to a WM_PAINT message. |
1249 | */ |
1250 | void term_paint (Context ctx, int l, int t, int r, int b) { |
1251 | int i, j, left, top, right, bottom; |
1252 | |
1253 | left = l / font_width; |
1254 | right = (r - 1) / font_width; |
1255 | top = t / font_height; |
1256 | bottom = (b - 1) / font_height; |
1257 | for (i = top; i <= bottom; i++) |
1258 | for (j = left; j <= right; j++) |
1259 | disptext[i*(cols+1)+j] = ATTR_INVALID; |
1260 | |
1261 | do_paint (ctx, FALSE); |
1262 | } |
1263 | |
1264 | /* |
1265 | * Attempt to scroll the scrollback. The second parameter gives the |
1266 | * position we want to scroll to; the first is +1 to denote that |
1267 | * this position is relative to the beginning of the scrollback, -1 |
1268 | * to denote it is relative to the end, and 0 to denote that it is |
1269 | * relative to the current position. |
1270 | */ |
1271 | void term_scroll (int rel, int where) { |
1272 | int n = where * (cols+1); |
1273 | |
1274 | disptop = (rel < 0 ? scrtop : |
1275 | rel > 0 ? sbtop : disptop) + n; |
1276 | if (disptop < sbtop) |
1277 | disptop = sbtop; |
1278 | if (disptop > scrtop) |
1279 | disptop = scrtop; |
1280 | update_sbar(); |
1281 | term_update(); |
1282 | } |
1283 | |
1284 | /* |
1285 | * Spread the selection outwards according to the selection mode. |
1286 | */ |
1287 | static unsigned long *sel_spread_half (unsigned long *p, int dir) { |
1288 | unsigned long *linestart, *lineend; |
1289 | int x; |
1290 | short wvalue; |
1291 | |
1292 | x = (p - text) % (cols+1); |
1293 | linestart = p - x; |
1294 | lineend = linestart + cols; |
1295 | |
1296 | switch (selmode) { |
1297 | case SM_CHAR: |
1298 | /* |
1299 | * In this mode, every character is a separate unit, except |
1300 | * for runs of spaces at the end of a non-wrapping line. |
1301 | */ |
1302 | if (!(linestart[cols] & ATTR_WRAPPED)) { |
1303 | unsigned long *q = lineend; |
1304 | while (q > linestart && (q[-1] & CHAR_MASK) == 0x20) |
1305 | q--; |
1306 | if (q == lineend) |
1307 | q--; |
1308 | if (p >= q) |
1309 | p = (dir == -1 ? q : lineend - 1); |
1310 | } |
1311 | break; |
1312 | case SM_WORD: |
1313 | /* |
1314 | * In this mode, the units are maximal runs of characters |
1315 | * whose `wordness' has the same value. |
1316 | */ |
1317 | wvalue = wordness[*p & CHAR_MASK]; |
1318 | if (dir == +1) { |
1319 | while (p < lineend && wordness[p[1] & CHAR_MASK] == wvalue) |
1320 | p++; |
1321 | } else { |
1322 | while (p > linestart && wordness[p[-1] & CHAR_MASK] == wvalue) |
1323 | p--; |
1324 | } |
1325 | break; |
1326 | case SM_LINE: |
1327 | /* |
1328 | * In this mode, every line is a unit. |
1329 | */ |
1330 | p = (dir == -1 ? linestart : lineend - 1); |
1331 | break; |
1332 | } |
1333 | return p; |
1334 | } |
1335 | |
1336 | static void sel_spread (void) { |
1337 | selstart = sel_spread_half (selstart, -1); |
1338 | selend = sel_spread_half (selend - 1, +1) + 1; |
1339 | } |
1340 | |
1341 | void term_mouse (Mouse_Button b, Mouse_Action a, int x, int y) { |
1342 | unsigned long *selpoint = disptop + y * (cols+1) + x; |
1343 | |
1344 | if (b == MB_SELECT && a == MA_CLICK) { |
1345 | deselect(); |
1346 | selstate = ABOUT_TO; |
1347 | selanchor = selpoint; |
1348 | selmode = SM_CHAR; |
1349 | } else if (b == MB_SELECT && (a == MA_2CLK || a == MA_3CLK)) { |
1350 | deselect(); |
1351 | selmode = (a == MA_2CLK ? SM_WORD : SM_LINE); |
1352 | selstate = DRAGGING; |
1353 | selstart = selanchor = selpoint; |
1354 | selend = selstart + 1; |
1355 | sel_spread(); |
1356 | } else if ((b == MB_SELECT && a == MA_DRAG) || |
1357 | (b == MB_EXTEND && a != MA_RELEASE)) { |
1358 | if (selstate == ABOUT_TO && selanchor == selpoint) |
1359 | return; |
1360 | if (b == MB_EXTEND && a != MA_DRAG && selstate == SELECTED) { |
1361 | if (selpoint-selstart < (selend-selstart)/2) |
1362 | selanchor = selend - 1; |
1363 | else |
1364 | selanchor = selstart; |
1365 | selstate = DRAGGING; |
1366 | } |
1367 | if (selstate != ABOUT_TO && selstate != DRAGGING) |
1368 | selanchor = selpoint; |
1369 | selstate = DRAGGING; |
1370 | if (selpoint < selanchor) { |
1371 | selstart = selpoint; |
1372 | selend = selanchor + 1; |
1373 | } else { |
1374 | selstart = selanchor; |
1375 | selend = selpoint + 1; |
1376 | } |
1377 | sel_spread(); |
1378 | } else if ((b == MB_SELECT || b == MB_EXTEND) && a == MA_RELEASE) { |
1379 | if (selstate == DRAGGING) { |
1380 | /* |
1381 | * We've completed a selection. We now transfer the |
1382 | * data to the clipboard. |
1383 | */ |
1384 | unsigned char *p = selspace; |
1385 | unsigned long *q = selstart; |
1386 | |
1387 | while (q < selend) { |
1388 | int nl = FALSE; |
1389 | unsigned long *lineend = q - (q-text) % (cols+1) + cols; |
1390 | unsigned long *nlpos = lineend; |
1391 | |
1392 | if (!(*nlpos & ATTR_WRAPPED)) { |
1393 | while ((nlpos[-1] & CHAR_MASK) == 0x20 && nlpos > q) |
1394 | nlpos--; |
1395 | if (nlpos < selend) |
1396 | nl = TRUE; |
1397 | } |
1398 | while (q < nlpos && q < selend) |
1399 | *p++ = (unsigned char) (*q++ & CHAR_MASK); |
1400 | if (nl) { |
1401 | int i; |
1402 | for (i=0; i<sizeof(sel_nl); i++) |
1403 | *p++ = sel_nl[i]; |
1404 | } |
1405 | q = lineend + 1; /* start of next line */ |
1406 | } |
1407 | write_clip (selspace, p - selspace); |
1408 | selstate = SELECTED; |
1409 | } else |
1410 | selstate = NO_SELECTION; |
1411 | } else if (b == MB_PASTE && (a==MA_CLICK || a==MA_2CLK || a==MA_3CLK)) { |
1412 | char *data; |
1413 | int len; |
1414 | |
1415 | get_clip((void **) &data, &len); |
1416 | if (data) { |
1417 | char *p, *q; |
1418 | p = q = data; |
1419 | while (p < data+len) { |
1420 | while (p < data+len && |
1421 | !(p <= data+len-sizeof(sel_nl) && |
1422 | !memcmp(p, sel_nl, sizeof(sel_nl)))) |
1423 | p++; |
1424 | back->send (q, p-q); |
1425 | if (p <= data+len-sizeof(sel_nl) && |
1426 | !memcmp(p, sel_nl, sizeof(sel_nl))) { |
1427 | back->send ("\r", 1); |
1428 | p += sizeof(sel_nl); |
1429 | } |
1430 | q = p; |
1431 | } |
1432 | } |
1433 | get_clip(NULL, NULL); |
1434 | } |
1435 | |
1436 | term_update(); |
1437 | } |
1438 | |
1439 | static void deselect (void) { |
1440 | selstate = NO_SELECTION; |
1441 | selstart = selend = scrtop; |
1442 | } |
1443 | |
1444 | void term_deselect (void) { |
1445 | deselect(); |
1446 | term_update(); |
1447 | } |