/[LeafOK_CVS]/lbbs/src/screen.c
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Annotation of /lbbs/src/screen.c

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Revision 1.127 - (hide annotations)
Sat Nov 8 08:21:31 2025 UTC (4 months, 1 week ago) by sysadm
Branch: MAIN
Changes since 1.126: +19 -5 lines
Content type: text/x-csrc 
Support dynamic wide-character display width in str_process and editor related functions
Add dynamic / fixed wide-character display width selection
1 sysadm 1.121 /* SPDX-License-Identifier: GPL-3.0-or-later */
2     /*
3     * screen
4     * - advanced telnet-based user interactive input / output features
5     *
6 sysadm 1.122 * Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
7 sysadm 1.121 */
8 sysadm 1.1
9 sysadm 1.9 #include "bbs.h"
10 sysadm 1.6 #include "common.h"
11 sysadm 1.89 #include "editor.h"
12 sysadm 1.54 #include "file_loader.h"
13 sysadm 1.102 #include "io.h"
14     #include "log.h"
15 sysadm 1.101 #include "login.h"
16 sysadm 1.102 #include "screen.h"
17     #include "str_process.h"
18     #include <ctype.h>
19     #include <errno.h>
20 sysadm 1.52 #include <fcntl.h>
21 sysadm 1.98 #include <string.h>
22 sysadm 1.102 #include <stdlib.h>
23 sysadm 1.41 #include <unistd.h>
24 sysadm 1.127 #include <wchar.h>
25 sysadm 1.102 #include <sys/param.h>
26 sysadm 1.6 #include <sys/stat.h>
27 sysadm 1.55 #include <sys/shm.h>
28 sysadm 1.102 #include <sys/types.h>
29 sysadm 1.1
30 sysadm 1.124 const char CTRL_SEQ_CLR_LINE[] = "\033[K";
31 sysadm 1.9
32 sysadm 1.124 static const int ACTIVE_BOARD_HEIGHT = 8;
33    
34     static const int STR_TOP_LEFT_MAX_LEN = 80;
35     static const int STR_TOP_MIDDLE_MAX_LEN = 40;
36     static const int STR_TOP_RIGHT_MAX_LEN = 80;
37 sysadm 1.70
38 sysadm 1.119 static size_t get_time_str(char *s, size_t len)
39 sysadm 1.107 {
40     time_t curtime;
41     struct tm local_tm;
42    
43     time(&curtime);
44     localtime_r(&curtime, &local_tm);
45 sysadm 1.119 size_t j = strftime(s, len, "%m/%d %H:%M %Z", &local_tm);
46 sysadm 1.107
47 sysadm 1.119 return j;
48 sysadm 1.107 }
49    
50 sysadm 1.21 void moveto(int row, int col)
51 sysadm 1.1 {
52 sysadm 1.21 if (row >= 0)
53     {
54     prints("\033[%d;%dH", row, col);
55     }
56     else
57     {
58     prints("\r");
59     }
60 sysadm 1.1 }
61    
62 sysadm 1.21 void clrtoeol()
63 sysadm 1.1 {
64 sysadm 1.63 prints(CTRL_SEQ_CLR_LINE);
65 sysadm 1.2 }
66    
67 sysadm 1.21 void clrline(int line_begin, int line_end)
68 sysadm 1.5 {
69 sysadm 1.21 int i;
70 sysadm 1.6
71 sysadm 1.21 for (i = line_begin; i <= line_end; i++)
72     {
73     moveto(i, 0);
74 sysadm 1.63 prints(CTRL_SEQ_CLR_LINE);
75 sysadm 1.21 }
76 sysadm 1.5 }
77    
78 sysadm 1.21 void clrtobot(int line_begin)
79 sysadm 1.16 {
80 sysadm 1.21 moveto(line_begin, 0);
81 sysadm 1.25 prints("\033[J");
82     moveto(line_begin, 0);
83 sysadm 1.16 }
84    
85 sysadm 1.21 void clearscr()
86 sysadm 1.2 {
87 sysadm 1.23 prints("\033[2J");
88 sysadm 1.21 moveto(0, 0);
89 sysadm 1.6 }
90    
91 sysadm 1.113 inline int press_any_key()
92     {
93 sysadm 1.114 return press_any_key_ex(" \033[1;33m按任意键继续...\033[m", 60);
94 sysadm 1.113 }
95    
96 sysadm 1.114 int press_any_key_ex(const char *msg, int sec)
97 sysadm 1.6 {
98 sysadm 1.112 int ch = 0;
99     int duration = 0;
100     time_t t_begin = time(NULL);
101    
102 sysadm 1.53 moveto(SCREEN_ROWS, 0);
103 sysadm 1.21 clrtoeol();
104 sysadm 1.6
105 sysadm 1.113 prints(msg);
106 sysadm 1.21 iflush();
107 sysadm 1.6
108 sysadm 1.114 igetch_reset();
109    
110 sysadm 1.112 do
111     {
112 sysadm 1.114 ch = igetch_t(sec - duration);
113 sysadm 1.112 duration = (int)(time(NULL) - t_begin);
114     } while (!SYS_server_exit && ch == 0 && duration < 60);
115    
116     return ch;
117 sysadm 1.1 }
118    
119 sysadm 1.21 void set_input_echo(int echo)
120 sysadm 1.7 {
121 sysadm 1.21 if (echo)
122     {
123     outc('\x83'); // ASCII code 131
124     }
125     else
126     {
127 sysadm 1.111 // outc ('\x85'); // ASCII code 133
128 sysadm 1.21 prints("\xff\xfb\x01\xff\xfb\x03");
129     }
130 sysadm 1.111 iflush();
131 sysadm 1.7 }
132    
133 sysadm 1.124 static int _str_input(char *buffer, int buf_size, int max_display_len, enum io_echo_t echo_mode)
134 sysadm 1.1 {
135 sysadm 1.104 int ch;
136 sysadm 1.38 int offset = 0;
137 sysadm 1.104 int eol;
138     int display_len;
139 sysadm 1.127 char input_str[5];
140 sysadm 1.104 int str_len = 0;
141 sysadm 1.127 wchar_t wcs[2];
142 sysadm 1.104 char c;
143 sysadm 1.1
144 sysadm 1.38 buffer[buf_size - 1] = '\0';
145 sysadm 1.104 offset = split_line(buffer, max_display_len, &eol, &display_len, 0);
146 sysadm 1.21
147 sysadm 1.47 igetch_reset();
148    
149 sysadm 1.48 while (!SYS_server_exit)
150 sysadm 1.1 {
151 sysadm 1.123 ch = igetch_t(MIN(BBS_max_user_idle_time, 60));
152 sysadm 1.48
153 sysadm 1.104 if (ch == CR)
154 sysadm 1.22 {
155 sysadm 1.21 break;
156 sysadm 1.22 }
157 sysadm 1.104 else if (ch == KEY_TIMEOUT || ch == KEY_NULL) // timeout or broken pipe
158 sysadm 1.41 {
159     return -1;
160     }
161 sysadm 1.104 else if (ch == LF || ch == '\0')
162 sysadm 1.22 {
163 sysadm 1.21 continue;
164 sysadm 1.22 }
165 sysadm 1.104 else if (ch == BACKSPACE)
166 sysadm 1.21 {
167     if (offset > 0)
168     {
169 sysadm 1.31 offset--;
170 sysadm 1.104 if (buffer[offset] < 0 || buffer[offset] > 127) // UTF8
171 sysadm 1.31 {
172 sysadm 1.115 while (offset > 0 && (buffer[offset] & 0xc0) != 0xc0)
173 sysadm 1.31 {
174 sysadm 1.104 offset--;
175 sysadm 1.31 }
176 sysadm 1.104 display_len--;
177     prints("\033[D \033[D");
178 sysadm 1.31 }
179     buffer[offset] = '\0';
180 sysadm 1.104 display_len--;
181 sysadm 1.31 prints("\033[D \033[D");
182 sysadm 1.21 iflush();
183     }
184     continue;
185     }
186 sysadm 1.104 else if (ch > 255 || iscntrl(ch))
187 sysadm 1.21 {
188     continue;
189     }
190 sysadm 1.104 else if ((ch & 0xff80) == 0x80) // head of multi-byte character
191 sysadm 1.21 {
192 sysadm 1.104 str_len = 0;
193 sysadm 1.115 c = (char)(ch & 0xf0);
194     while (c & 0x80)
195 sysadm 1.104 {
196     input_str[str_len] = (char)(ch - 256);
197     str_len++;
198 sysadm 1.115 c = (c & 0x7f) << 1;
199 sysadm 1.104
200 sysadm 1.115 if ((c & 0x80) == 0) // Input completed
201 sysadm 1.104 {
202     break;
203     }
204    
205     // Expect additional bytes of input
206     ch = igetch(100); // 0.1 second
207     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Ignore received bytes if no futher input
208     {
209 sysadm 1.106 #ifdef _DEBUG
210 sysadm 1.104 log_error("Ignore %d bytes of incomplete UTF8 character\n", str_len);
211 sysadm 1.106 #endif
212 sysadm 1.104 str_len = 0;
213     break;
214     }
215     }
216 sysadm 1.127 input_str[str_len] = '\0';
217 sysadm 1.104
218     if (str_len == 0) // Incomplete input
219     {
220     continue;
221     }
222    
223 sysadm 1.127 if (mbstowcs(wcs, input_str, 1) == (size_t)-1)
224     {
225     log_error("mbstowcs() error\n");
226     }
227     if (offset + str_len > buf_size - 1 || display_len + (UTF8_fixed_width ? 2 : wcwidth(wcs[0])) > max_display_len) // No enough space for Chinese character
228 sysadm 1.31 {
229     outc('\a');
230     iflush();
231     continue;
232     }
233 sysadm 1.104
234     memcpy(buffer + offset, input_str, (size_t)str_len);
235     offset += str_len;
236     buffer[offset] = '\0';
237     display_len += 2;
238    
239     switch (echo_mode)
240     {
241     case DOECHO:
242     prints(input_str);
243     break;
244     case NOECHO:
245     prints("**");
246     break;
247     }
248 sysadm 1.21 }
249 sysadm 1.104 else if (ch >= 32 && ch < 127) // Printable character
250 sysadm 1.21 {
251 sysadm 1.104 if (offset + 1 > buf_size - 1 || display_len + 1 > max_display_len)
252     {
253     outc('\a');
254     iflush();
255     continue;
256     }
257 sysadm 1.43
258 sysadm 1.104 buffer[offset++] = (char)ch;
259     buffer[offset] = '\0';
260     display_len++;
261 sysadm 1.43
262 sysadm 1.104 switch (echo_mode)
263     {
264     case DOECHO:
265     outc((char)ch);
266     break;
267     case NOECHO:
268     outc('*');
269     break;
270     }
271 sysadm 1.21 }
272 sysadm 1.104 else // Invalid character
273 sysadm 1.21 {
274 sysadm 1.104 continue;
275 sysadm 1.21 }
276 sysadm 1.104
277     iflush();
278 sysadm 1.6 }
279 sysadm 1.1
280 sysadm 1.21 return offset;
281 sysadm 1.1 }
282    
283 sysadm 1.124 int str_input(char *buffer, int buf_size, enum io_echo_t echo_mode)
284 sysadm 1.18 {
285 sysadm 1.32 int len;
286    
287     buffer[0] = '\0';
288 sysadm 1.21
289 sysadm 1.104 len = _str_input(buffer, buf_size, buf_size, echo_mode);
290 sysadm 1.21
291 sysadm 1.32 prints("\r\n");
292     iflush();
293 sysadm 1.21
294 sysadm 1.32 return len;
295 sysadm 1.115 }
296 sysadm 1.18
297 sysadm 1.108 int get_data(int row, int col, char *prompt, char *buffer, int buf_size, int max_display_len)
298 sysadm 1.15 {
299 sysadm 1.108 int len = 0;
300     int col_cur = 0;
301     int ch;
302     int offset = 0;
303     int eol;
304     int display_len;
305 sysadm 1.127 char input_str[5];
306     wchar_t wcs[2];
307 sysadm 1.108 int str_len = 0;
308     char c;
309    
310     buffer[buf_size - 1] = '\0';
311     offset = split_line(buffer, max_display_len, &eol, &display_len, 0);
312     buffer[offset] = '\0';
313     len = offset;
314     col_cur = col + str_length(prompt, 1) + display_len;
315 sysadm 1.15
316 sysadm 1.21 moveto(row, col);
317 sysadm 1.80 prints("%s", prompt);
318     prints("%s", buffer);
319 sysadm 1.108 prints("%*s", max_display_len - display_len, "");
320     moveto(row, col_cur);
321 sysadm 1.21 iflush();
322 sysadm 1.15
323 sysadm 1.108 igetch_reset();
324    
325     while (!SYS_server_exit)
326     {
327 sysadm 1.123 ch = igetch_t(MIN(BBS_max_user_idle_time, 60));
328 sysadm 1.108
329     if (ch == CR)
330     {
331     break;
332     }
333     else if (ch == KEY_TIMEOUT || ch == KEY_NULL) // timeout or broken pipe
334     {
335     return -1;
336     }
337     else if (ch == LF || ch == '\0')
338     {
339     continue;
340     }
341     else if (ch == BACKSPACE)
342     {
343     if (offset > 0)
344     {
345     str_len = 1;
346     offset--;
347     if (buffer[offset] < 0 || buffer[offset] > 127) // UTF8
348     {
349 sysadm 1.115 while (offset > 0 && (buffer[offset] & 0xc0) != 0xc0)
350 sysadm 1.108 {
351     str_len++;
352     offset--;
353     }
354     display_len--;
355     col_cur--;
356     }
357    
358     memmove(buffer + offset, buffer + offset + str_len, (size_t)(len - offset - str_len));
359     len -= str_len;
360     buffer[len] = '\0';
361     display_len--;
362     col_cur--;
363    
364     moveto(row, col_cur);
365     prints("%s", buffer + offset);
366     prints("%*s", max_display_len - display_len, "");
367     moveto(row, col_cur);
368     iflush();
369     }
370     continue;
371     }
372     else if (ch == KEY_DEL)
373     {
374     if (offset < len)
375     {
376     if ((buffer[offset] & 0x80) == 0x80) // head of multi-byte character
377     {
378     str_len = 0;
379 sysadm 1.115 c = (char)(buffer[offset] & 0xf0);
380     while (c & 0x80)
381 sysadm 1.108 {
382     str_len++;
383 sysadm 1.115 c = (c & 0x7f) << 1;
384 sysadm 1.108 }
385     display_len--;
386     }
387     else
388     {
389     str_len = 1;
390     }
391    
392     memmove(buffer + offset, buffer + offset + str_len, (size_t)(len - offset - str_len));
393     len -= str_len;
394     buffer[len] = '\0';
395     display_len--;
396    
397     moveto(row, col_cur);
398     prints("%s", buffer + offset);
399     prints("%*s", max_display_len - display_len, "");
400     moveto(row, col_cur);
401     iflush();
402     }
403     continue;
404     }
405     else if (ch == KEY_LEFT)
406     {
407     if (offset > 0)
408     {
409     str_len = 1;
410     offset--;
411     if (buffer[offset] < 0 || buffer[offset] > 127) // UTF8
412     {
413 sysadm 1.115 while (offset > 0 && (buffer[offset] & 0xc0) != 0xc0)
414 sysadm 1.108 {
415     str_len++;
416     offset--;
417     }
418     col_cur--;
419     }
420     col_cur--;
421    
422     moveto(row, col_cur);
423     iflush();
424     }
425     continue;
426     }
427     else if (ch == KEY_RIGHT)
428     {
429     if (offset < len)
430     {
431     str_len = 0;
432     if ((buffer[offset] & 0x80) == 0x80) // head of multi-byte character
433     {
434 sysadm 1.115 c = (char)(buffer[offset] & 0xf0);
435     while (c & 0x80)
436 sysadm 1.108 {
437     str_len++;
438 sysadm 1.115 c = (c & 0x7f) << 1;
439 sysadm 1.108 }
440     col_cur++;
441     }
442     else
443     {
444     str_len = 1;
445     }
446    
447     col_cur++;
448     offset += str_len;
449    
450     moveto(row, col_cur);
451     iflush();
452     }
453     continue;
454     }
455     else if (ch == KEY_HOME || ch == KEY_UP)
456     {
457     if (offset > 0)
458     {
459     offset = 0;
460     col_cur = col + str_length(prompt, 1);
461    
462     moveto(row, col_cur);
463     iflush();
464     }
465     continue;
466     }
467     else if (ch == KEY_END || ch == KEY_DOWN)
468     {
469     if (offset < len)
470     {
471     offset = len;
472     col_cur = col + str_length(prompt, 1) + display_len;
473    
474     moveto(row, col_cur);
475     iflush();
476     }
477     continue;
478     }
479     else if (ch > 255 || iscntrl(ch))
480     {
481     continue;
482     }
483     else if ((ch & 0xff80) == 0x80) // head of multi-byte character
484     {
485     str_len = 0;
486 sysadm 1.115 c = (char)(ch & 0xf0);
487     while (c & 0x80)
488 sysadm 1.108 {
489     input_str[str_len] = (char)(ch - 256);
490     str_len++;
491 sysadm 1.115 c = (c & 0x7f) << 1;
492 sysadm 1.108
493 sysadm 1.115 if ((c & 0x80) == 0) // Input completed
494 sysadm 1.108 {
495     break;
496     }
497    
498     // Expect additional bytes of input
499     ch = igetch(100); // 0.1 second
500     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Ignore received bytes if no futher input
501     {
502     #ifdef _DEBUG
503     log_error("Ignore %d bytes of incomplete UTF8 character\n", str_len);
504     #endif
505     str_len = 0;
506     break;
507     }
508     }
509 sysadm 1.127 input_str[str_len] = '\0';
510 sysadm 1.108
511     if (str_len == 0) // Incomplete input
512     {
513     continue;
514     }
515    
516 sysadm 1.127 if (mbstowcs(wcs, input_str, 1) == (size_t)-1)
517     {
518     log_error("mbstowcs() error\n");
519     }
520     if (len + str_len > buf_size - 1 || display_len + (UTF8_fixed_width ? 2 : wcwidth(wcs[0])) > max_display_len) // No enough space for Chinese character
521 sysadm 1.108 {
522     outc('\a');
523     iflush();
524     continue;
525     }
526    
527     memmove(buffer + offset + str_len, buffer + offset, (size_t)(len - offset));
528     memcpy(buffer + offset, input_str, (size_t)str_len);
529     len += str_len;
530     buffer[len] = '\0';
531     display_len += 2;
532    
533     moveto(row, col_cur);
534     prints("%s", buffer + offset);
535     prints("%*s", max_display_len - display_len, "");
536    
537     col_cur += 2;
538    
539     moveto(row, col_cur);
540     iflush();
541    
542     offset += str_len;
543     }
544     else if (ch >= 32 && ch < 127) // Printable character
545     {
546     if (len + 1 > buf_size - 1 || display_len + 1 > max_display_len)
547     {
548     outc('\a');
549     iflush();
550     continue;
551     }
552    
553     memmove(buffer + offset + 1, buffer + offset, (size_t)(len - offset));
554     buffer[offset] = (char)ch;
555     len++;
556     buffer[len] = '\0';
557     display_len++;
558    
559     moveto(row, col_cur);
560     prints("%s", buffer + offset);
561     prints("%*s", max_display_len - display_len, "");
562    
563     col_cur++;
564    
565     moveto(row, col_cur);
566     iflush();
567    
568     offset++;
569     }
570     else // Invalid character
571     {
572     continue;
573     }
574     }
575 sysadm 1.21
576     return len;
577 sysadm 1.15 }
578    
579 sysadm 1.89 int display_data(const void *p_data, long display_line_total, const long *p_line_offsets, int eof_exit,
580 sysadm 1.81 display_data_key_handler key_handler, const char *help_filename)
581 sysadm 1.1 {
582 sysadm 1.37 static int show_help = 1;
583 sysadm 1.26 char buffer[LINE_BUFFER_LEN];
584 sysadm 1.85 DISPLAY_CTX ctx;
585 sysadm 1.81 int ch = 0;
586 sysadm 1.91 int input_ok;
587     const int screen_begin_row = 1;
588 sysadm 1.95 const int screen_row_total = SCREEN_ROWS - screen_begin_row;
589     int output_current_row = screen_begin_row;
590     int output_end_row = SCREEN_ROWS - 1;
591 sysadm 1.54 long int line_current = 0;
592 sysadm 1.34 long int len;
593     long int percentile;
594 sysadm 1.54 int loop;
595 sysadm 1.78 int eol, display_len;
596 sysadm 1.52
597 sysadm 1.95 clrline(output_current_row, SCREEN_ROWS);
598 sysadm 1.6
599 sysadm 1.81 // update msg_ext with extended key handler
600 sysadm 1.85 if (key_handler(&ch, &ctx) != 0)
601 sysadm 1.81 {
602     return ch;
603     }
604    
605 sysadm 1.54 loop = 1;
606 sysadm 1.44 while (!SYS_server_exit && loop)
607 sysadm 1.6 {
608 sysadm 1.126 if (eof_exit > 0 && line_current >= display_line_total)
609 sysadm 1.27 {
610 sysadm 1.82 if (eof_exit == 1)
611 sysadm 1.27 {
612     ch = press_any_key();
613     }
614 sysadm 1.82 else // if (eof_exit == 2)
615 sysadm 1.27 {
616     iflush();
617     }
618    
619     loop = 0;
620     break;
621     }
622    
623 sysadm 1.95 if (line_current >= display_line_total || output_current_row > output_end_row)
624 sysadm 1.21 {
625 sysadm 1.95 ctx.reach_begin = (line_current < output_current_row ? 1 : 0);
626 sysadm 1.85
627 sysadm 1.95 if (line_current - (output_current_row - screen_begin_row) + screen_row_total < display_line_total)
628 sysadm 1.27 {
629 sysadm 1.95 percentile = (line_current - (output_current_row - screen_begin_row) + screen_row_total) * 100 / display_line_total;
630 sysadm 1.85 ctx.reach_end = 0;
631 sysadm 1.27 }
632     else
633     {
634     percentile = 100;
635 sysadm 1.85 ctx.reach_end = 1;
636 sysadm 1.27 }
637 sysadm 1.6
638 sysadm 1.95 ctx.line_top = line_current - (output_current_row - screen_begin_row) + 1;
639     ctx.line_bottom = MIN(line_current - (output_current_row - screen_begin_row) + screen_row_total, display_line_total);
640 sysadm 1.85
641 sysadm 1.78 snprintf(buffer, sizeof(buffer),
642 sysadm 1.104 "\033[1;44;33m第\033[32m%ld\033[33m-\033[32m%ld\033[33m行 (\033[32m%ld%%\033[33m) %s",
643 sysadm 1.85 ctx.line_top,
644     ctx.line_bottom,
645     percentile,
646     ctx.msg);
647 sysadm 1.78
648 sysadm 1.97 len = split_line(buffer, SCREEN_COLS, &eol, &display_len, 1);
649 sysadm 1.81 for (; display_len < SCREEN_COLS; display_len++)
650 sysadm 1.78 {
651     buffer[len++] = ' ';
652     }
653     buffer[len] = '\0';
654     strncat(buffer, "\033[m", sizeof(buffer) - 1 - strnlen(buffer, sizeof(buffer)));
655    
656 sysadm 1.53 moveto(SCREEN_ROWS, 0);
657 sysadm 1.80 prints("%s", buffer);
658 sysadm 1.26 iflush();
659 sysadm 1.6
660 sysadm 1.26 input_ok = 0;
661 sysadm 1.44 while (!SYS_server_exit && !input_ok)
662 sysadm 1.21 {
663 sysadm 1.123 ch = igetch_t(BBS_max_user_idle_time);
664 sysadm 1.94 input_ok = 1;
665    
666 sysadm 1.110 if (ch != KEY_NULL && ch != KEY_TIMEOUT)
667     {
668     BBS_last_access_tm = time(NULL);
669     }
670    
671 sysadm 1.81 // extended key handler
672 sysadm 1.85 if (key_handler(&ch, &ctx) != 0)
673 sysadm 1.81 {
674     goto cleanup;
675     }
676    
677 sysadm 1.26 switch (ch)
678 sysadm 1.21 {
679 sysadm 1.67 case KEY_NULL:
680 sysadm 1.110 log_error("KEY_NULL\n");
681     goto cleanup;
682 sysadm 1.41 case KEY_TIMEOUT:
683 sysadm 1.110 log_error("User input timeout\n");
684 sysadm 1.41 goto cleanup;
685 sysadm 1.50 case KEY_HOME:
686 sysadm 1.95 if (line_current - output_current_row < 0) // Reach begin
687 sysadm 1.84 {
688     break;
689     }
690 sysadm 1.54 line_current = 0;
691 sysadm 1.95 output_current_row = screen_begin_row;
692     output_end_row = SCREEN_ROWS - 1;
693     clrline(output_current_row, SCREEN_ROWS);
694 sysadm 1.50 break;
695     case KEY_END:
696 sysadm 1.91 if (display_line_total < screen_row_total)
697 sysadm 1.83 {
698 sysadm 1.84 break;
699 sysadm 1.83 }
700 sysadm 1.91 line_current = display_line_total - screen_row_total;
701 sysadm 1.95 output_current_row = screen_begin_row;
702     output_end_row = SCREEN_ROWS - 1;
703     clrline(output_current_row, SCREEN_ROWS);
704 sysadm 1.50 break;
705 sysadm 1.26 case KEY_UP:
706 sysadm 1.95 if (line_current - output_current_row < 0) // Reach begin
707 sysadm 1.21 {
708     break;
709 sysadm 1.26 }
710 sysadm 1.95 line_current -= output_current_row;
711     output_current_row = screen_begin_row;
712 sysadm 1.89 // screen_end_line = screen_begin_line;
713 sysadm 1.39 // prints("\033[T"); // Scroll down 1 line
714 sysadm 1.95 output_end_row = SCREEN_ROWS - 1; // Legacy Fterm only works with this line
715 sysadm 1.26 break;
716 sysadm 1.49 case CR:
717 sysadm 1.26 case KEY_DOWN:
718 sysadm 1.95 if (line_current + (screen_row_total - (output_current_row - screen_begin_row)) >= display_line_total) // Reach end
719 sysadm 1.26 {
720 sysadm 1.21 break;
721 sysadm 1.26 }
722 sysadm 1.95 line_current += (screen_row_total - (output_current_row - screen_begin_row));
723     output_current_row = screen_row_total;
724     output_end_row = SCREEN_ROWS - 1;
725 sysadm 1.53 moveto(SCREEN_ROWS, 0);
726 sysadm 1.26 clrtoeol();
727 sysadm 1.104 // prints("\033[S"); // Scroll up 1 line
728 sysadm 1.103 prints("\n"); // Legacy Cterm only works with this line
729 sysadm 1.26 break;
730     case KEY_PGUP:
731 sysadm 1.95 if (line_current - output_current_row < 0) // Reach begin
732 sysadm 1.26 {
733 sysadm 1.21 break;
734 sysadm 1.26 }
735 sysadm 1.95 line_current -= ((screen_row_total - 1) + (output_current_row - screen_begin_row));
736 sysadm 1.54 if (line_current < 0)
737 sysadm 1.26 {
738 sysadm 1.54 line_current = 0;
739 sysadm 1.26 }
740 sysadm 1.95 output_current_row = screen_begin_row;
741     output_end_row = SCREEN_ROWS - 1;
742     clrline(output_current_row, SCREEN_ROWS);
743 sysadm 1.26 break;
744 sysadm 1.116 case KEY_SPACE:
745 sysadm 1.26 case KEY_PGDN:
746 sysadm 1.95 if (line_current + screen_row_total - (output_current_row - screen_begin_row) >= display_line_total) // Reach end
747 sysadm 1.26 {
748 sysadm 1.21 break;
749     }
750 sysadm 1.95 line_current += (screen_row_total - 1) - (output_current_row - screen_begin_row);
751 sysadm 1.91 if (line_current + screen_row_total > display_line_total) // No enough lines to display
752 sysadm 1.26 {
753 sysadm 1.91 line_current = display_line_total - screen_row_total;
754 sysadm 1.26 }
755 sysadm 1.95 output_current_row = screen_begin_row;
756     output_end_row = SCREEN_ROWS - 1;
757     clrline(output_current_row, SCREEN_ROWS);
758 sysadm 1.26 break;
759 sysadm 1.74 case KEY_ESC:
760 sysadm 1.26 case KEY_LEFT:
761 sysadm 1.27 loop = 0;
762 sysadm 1.26 break;
763     case 'h':
764 sysadm 1.81 if (!show_help) // Not reentrant
765 sysadm 1.37 {
766     break;
767     }
768 sysadm 1.26 // Display help information
769 sysadm 1.37 show_help = 0;
770 sysadm 1.89 display_file(help_filename, 1);
771 sysadm 1.37 show_help = 1;
772 sysadm 1.81 case KEY_F5:
773 sysadm 1.26 // Refresh after display help information
774 sysadm 1.95 line_current -= (output_current_row - screen_begin_row);
775     output_current_row = screen_begin_row;
776     output_end_row = SCREEN_ROWS - 1;
777     clrline(output_current_row, SCREEN_ROWS);
778 sysadm 1.89 break;
779 sysadm 1.81 case 0: // Refresh bottom line
780     break;
781 sysadm 1.26 default:
782     input_ok = 0;
783     break;
784 sysadm 1.21 }
785 sysadm 1.6 }
786 sysadm 1.21
787 sysadm 1.26 continue;
788     }
789 sysadm 1.21
790 sysadm 1.55 len = p_line_offsets[line_current + 1] - p_line_offsets[line_current];
791 sysadm 1.89 if (len >= sizeof(buffer))
792 sysadm 1.26 {
793 sysadm 1.87 log_error("Buffer overflow: len=%ld(%ld - %ld) line=%ld \n",
794 sysadm 1.62 len, p_line_offsets[line_current + 1], p_line_offsets[line_current], line_current);
795 sysadm 1.89 len = sizeof(buffer) - 1;
796 sysadm 1.26 }
797 sysadm 1.87 else if (len < 0)
798     {
799     log_error("Incorrect line offsets: len=%ld(%ld - %ld) line=%ld \n",
800     len, p_line_offsets[line_current + 1], p_line_offsets[line_current], line_current);
801     len = 0;
802     }
803 sysadm 1.52
804 sysadm 1.55 memcpy(buffer, (const char *)p_data + p_line_offsets[line_current], (size_t)len);
805 sysadm 1.52 buffer[len] = '\0';
806    
807 sysadm 1.95 moveto(output_current_row, 0);
808 sysadm 1.26 clrtoeol();
809     prints("%s", buffer);
810 sysadm 1.54 line_current++;
811 sysadm 1.95 output_current_row++;
812 sysadm 1.26 }
813 sysadm 1.6
814 sysadm 1.41 cleanup:
815 sysadm 1.78 return ch;
816     }
817    
818 sysadm 1.126 int display_file_key_handler(int *p_key, DISPLAY_CTX *p_ctx)
819 sysadm 1.81 {
820 sysadm 1.85 switch (*p_key)
821 sysadm 1.81 {
822     case 0: // Set msg
823 sysadm 1.85 snprintf(p_ctx->msg, sizeof(p_ctx->msg),
824 sysadm 1.104 "| 返回[\033[32m←\033[33m,\033[32mESC\033[33m] | "
825     "移动[\033[32m↑\033[33m/\033[32m↓\033[33m/\033[32mPgUp\033[33m/\033[32mPgDn\033[33m] | "
826     "帮助[\033[32mh\033[33m] |");
827 sysadm 1.81 break;
828     }
829    
830     return 0;
831     }
832    
833 sysadm 1.89 int display_file(const char *filename, int eof_exit)
834 sysadm 1.78 {
835 sysadm 1.81 int ret;
836 sysadm 1.78 const void *p_shm;
837     size_t data_len;
838     long line_total;
839     const void *p_data;
840     const long *p_line_offsets;
841    
842     if ((p_shm = get_file_shm_readonly(filename, &data_len, &line_total, &p_data, &p_line_offsets)) == NULL)
843     {
844     log_error("get_file_shm(%s) error\n", filename);
845     return KEY_NULL;
846     }
847    
848 sysadm 1.101 if (user_online_update("VIEW_FILE") < 0)
849     {
850     log_error("user_online_update(VIEW_FILE) error\n");
851     }
852    
853 sysadm 1.89 ret = display_data(p_data, line_total, p_line_offsets, eof_exit, display_file_key_handler, DATA_READ_HELP);
854 sysadm 1.78
855 sysadm 1.69 if (detach_file_shm(p_shm) < 0)
856     {
857     log_error("detach_file_shm(%s) error\n", filename);
858     }
859    
860 sysadm 1.81 return ret;
861 sysadm 1.1 }
862 sysadm 1.9
863 sysadm 1.73 int show_top(const char *str_left, const char *str_middle, const char *str_right)
864 sysadm 1.9 {
865 sysadm 1.71 char str_left_f[STR_TOP_LEFT_MAX_LEN + 1];
866     char str_middle_f[STR_TOP_MIDDLE_MAX_LEN + 1];
867     char str_right_f[STR_TOP_RIGHT_MAX_LEN + 1];
868 sysadm 1.70 int str_left_len;
869 sysadm 1.71 int str_middle_len;
870 sysadm 1.70 int str_right_len;
871 sysadm 1.71 int eol;
872 sysadm 1.51 int len;
873 sysadm 1.40
874 sysadm 1.71 strncpy(str_left_f, str_left, sizeof(str_left_f) - 1);
875     str_left_f[sizeof(str_left_f) - 1] = '\0';
876 sysadm 1.105 len = split_line(str_left_f, STR_TOP_LEFT_MAX_LEN / 2, &eol, &str_left_len, 1);
877 sysadm 1.71 str_left_f[len] = '\0';
878    
879     strncpy(str_middle_f, str_middle, sizeof(str_middle_f) - 1);
880     str_middle_f[sizeof(str_middle_f) - 1] = '\0';
881 sysadm 1.105 len = split_line(str_middle, STR_TOP_MIDDLE_MAX_LEN / 2, &eol, &str_middle_len, 1);
882 sysadm 1.71 str_middle_f[len] = '\0';
883    
884 sysadm 1.73 strncpy(str_right_f, str_right, sizeof(str_right_f) - 1);
885 sysadm 1.71 str_right_f[sizeof(str_right_f) - 1] = '\0';
886 sysadm 1.105 len = split_line(str_right, STR_TOP_RIGHT_MAX_LEN / 2, &eol, &str_right_len, 1);
887 sysadm 1.71 str_right_f[len] = '\0';
888 sysadm 1.9
889 sysadm 1.21 moveto(1, 0);
890 sysadm 1.26 clrtoeol();
891 sysadm 1.105 prints("\033[1;44;33m%s\033[37m%*s%s\033[33m%*s%s\033[m",
892     str_left_f, 44 - str_left_len - str_middle_len, "",
893     str_middle_f, 36 - str_right_len, "", str_right_f);
894 sysadm 1.9
895 sysadm 1.21 return 0;
896 sysadm 1.9 }
897    
898 sysadm 1.57 int show_bottom(const char *msg)
899 sysadm 1.9 {
900 sysadm 1.26 char str_time[LINE_BUFFER_LEN];
901 sysadm 1.119 int len_str_time;
902 sysadm 1.21 time_t time_online;
903     struct tm *tm_online;
904 sysadm 1.77 char msg_f[LINE_BUFFER_LEN];
905 sysadm 1.72 int eol;
906 sysadm 1.119 int len_msg;
907 sysadm 1.58 int len;
908     int len_username;
909 sysadm 1.88 char str_tm_online[LINE_BUFFER_LEN];
910 sysadm 1.125 int len_str_tm_online;
911 sysadm 1.9
912 sysadm 1.119 len_str_time = (int)get_time_str(str_time, sizeof(str_time));
913 sysadm 1.9
914 sysadm 1.76 msg_f[0] = '\0';
915 sysadm 1.119 len_msg = 0;
916 sysadm 1.77 if (msg != NULL)
917 sysadm 1.76 {
918 sysadm 1.77 strncpy(msg_f, msg, sizeof(msg_f) - 1);
919 sysadm 1.76 msg_f[sizeof(msg_f) - 1] = '\0';
920 sysadm 1.119 len = split_line(msg_f, 23, &eol, &len_msg, 1);
921 sysadm 1.77 msg_f[len] = '\0';
922 sysadm 1.76 }
923 sysadm 1.58
924     len_username = (int)strnlen(BBS_username, sizeof(BBS_username));
925    
926 sysadm 1.99 time_online = time(NULL) - BBS_login_tm;
927 sysadm 1.21 tm_online = gmtime(&time_online);
928 sysadm 1.118 if (tm_online->tm_mday > 1)
929 sysadm 1.88 {
930     snprintf(str_tm_online, sizeof(str_tm_online),
931 sysadm 1.119 "\033[36m%d\033[33md \033[36m%d\033[33m:\033[36m%.2d",
932     tm_online->tm_mday - 1, tm_online->tm_hour, tm_online->tm_min);
933 sysadm 1.88 }
934     else
935     {
936     snprintf(str_tm_online, sizeof(str_tm_online),
937 sysadm 1.119 "\033[36m%d\033[33m:\033[36m%.2d",
938 sysadm 1.89 tm_online->tm_hour, tm_online->tm_min);
939 sysadm 1.88 }
940 sysadm 1.125 len_str_tm_online = str_length(str_tm_online, 1);
941 sysadm 1.9
942 sysadm 1.53 moveto(SCREEN_ROWS, 0);
943 sysadm 1.26 clrtoeol();
944 sysadm 1.119 prints("\033[1;44;33m时间[\033[36m%s\033[33m]%s%*s \033[33m用户[\033[36m%s\033[33m][%s\033[33m]\033[m",
945 sysadm 1.127 str_time, msg_f, 65 - len_str_time - len_msg - len_username - len_str_tm_online,
946     "", BBS_username, str_tm_online);
947 sysadm 1.9
948 sysadm 1.21 return 0;
949 sysadm 1.9 }
950    
951 sysadm 1.21 int show_active_board()
952 sysadm 1.9 {
953 sysadm 1.59 static int line_current = 0;
954 sysadm 1.61 static const void *p_shm = NULL;
955 sysadm 1.59 static size_t data_len;
956     static long line_total;
957 sysadm 1.61 static const void *p_data;
958 sysadm 1.59 static const long *p_line_offsets;
959    
960 sysadm 1.65 static time_t t_last_show = 0;
961     static int line_last = 0;
962    
963 sysadm 1.26 char buffer[LINE_BUFFER_LEN];
964 sysadm 1.59 long int len;
965 sysadm 1.9
966 sysadm 1.61 if (p_shm == NULL)
967 sysadm 1.26 {
968 sysadm 1.69 if ((p_shm = get_file_shm_readonly(DATA_ACTIVE_BOARD, &data_len, &line_total, &p_data, &p_line_offsets)) == NULL)
969 sysadm 1.9 {
970 sysadm 1.59 log_error("get_file_shm(%s) error\n", DATA_ACTIVE_BOARD);
971     return KEY_NULL;
972 sysadm 1.9 }
973 sysadm 1.26 }
974 sysadm 1.21
975 sysadm 1.99 if (time(NULL) - t_last_show >= 10)
976 sysadm 1.65 {
977     line_last = line_current;
978 sysadm 1.99 t_last_show = time(NULL);
979 sysadm 1.65 }
980     else
981     {
982     line_current = line_last;
983     }
984    
985 sysadm 1.64 clrline(2, 2 + ACTIVE_BOARD_HEIGHT);
986 sysadm 1.59
987 sysadm 1.26 for (int i = 0; i < ACTIVE_BOARD_HEIGHT; i++)
988     {
989 sysadm 1.59 len = p_line_offsets[line_current + 1] - p_line_offsets[line_current];
990     if (len >= LINE_BUFFER_LEN)
991 sysadm 1.9 {
992 sysadm 1.62 log_error("buffer overflow: len=%ld(%ld - %ld) line=%ld \n",
993     len, p_line_offsets[line_current + 1], p_line_offsets[line_current], line_current);
994 sysadm 1.59 len = LINE_BUFFER_LEN - 1;
995 sysadm 1.9 }
996 sysadm 1.59
997     memcpy(buffer, (const char *)p_data + p_line_offsets[line_current], (size_t)len);
998     buffer[len] = '\0';
999    
1000 sysadm 1.26 moveto(3 + i, 0);
1001     prints("%s", buffer);
1002 sysadm 1.59
1003     line_current++;
1004 sysadm 1.60 if (line_current >= line_total)
1005 sysadm 1.59 {
1006     line_current = 0;
1007     break;
1008     }
1009 sysadm 1.9 }
1010 sysadm 1.26
1011 sysadm 1.21 return 0;
1012 sysadm 1.9 }
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