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

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Revision 1.54 - (hide annotations)
Wed Nov 5 04:19:21 2025 UTC (4 months, 1 week ago) by sysadm
Branch: MAIN
Changes since 1.53: +7 -3 lines
Content type: text/x-csrc 
Use enum / const int instead of macro define constant integers
Use const char * instead of macro define for constant strings
1 sysadm 1.51 /* SPDX-License-Identifier: GPL-3.0-or-later */
2     /*
3     * editor
4     * - user interactive full-screen text editor
5     *
6 sysadm 1.52 * Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com>
7 sysadm 1.51 */
8 sysadm 1.1
9 sysadm 1.31 #include "bbs.h"
10     #include "common.h"
11 sysadm 1.1 #include "editor.h"
12     #include "io.h"
13     #include "log.h"
14 sysadm 1.43 #include "login.h"
15 sysadm 1.31 #include "memory_pool.h"
16 sysadm 1.1 #include "str_process.h"
17     #include <stdlib.h>
18 sysadm 1.30 #include <string.h>
19 sysadm 1.1 #include <sys/param.h>
20    
21 sysadm 1.54 enum _editor_constant_t
22     {
23     EDITOR_MEM_POOL_LINE_PER_CHUNK = 1000,
24     EDITOR_MEM_POOL_CHUNK_LIMIT = (MAX_EDITOR_DATA_LINES / EDITOR_MEM_POOL_LINE_PER_CHUNK + 1),
25     };
26    
27     static const char EDITOR_ESC_DISPLAY_STR[] = "\033[32m*\033[m";
28 sysadm 1.16
29     static MEMORY_POOL *p_mp_data_line;
30     static MEMORY_POOL *p_mp_editor_data;
31    
32     int editor_memory_pool_init(void)
33     {
34     if (p_mp_data_line != NULL || p_mp_editor_data != NULL)
35     {
36     log_error("Editor mem pool already initialized\n");
37     return -1;
38     }
39    
40     p_mp_data_line = memory_pool_init(MAX_EDITOR_DATA_LINE_LENGTH, EDITOR_MEM_POOL_LINE_PER_CHUNK, EDITOR_MEM_POOL_CHUNK_LIMIT);
41     if (p_mp_data_line == NULL)
42     {
43     log_error("Memory pool init error\n");
44     return -2;
45     }
46    
47     p_mp_editor_data = memory_pool_init(sizeof(EDITOR_DATA), 1, 1);
48 sysadm 1.45 if (p_mp_editor_data == NULL)
49 sysadm 1.16 {
50     log_error("Memory pool init error\n");
51     return -3;
52     }
53    
54     return 0;
55     }
56    
57     void editor_memory_pool_cleanup(void)
58     {
59     if (p_mp_data_line != NULL)
60     {
61     memory_pool_cleanup(p_mp_data_line);
62     p_mp_data_line = NULL;
63     }
64    
65     if (p_mp_editor_data != NULL)
66     {
67     memory_pool_cleanup(p_mp_editor_data);
68     p_mp_editor_data = NULL;
69     }
70     }
71 sysadm 1.12
72 sysadm 1.1 EDITOR_DATA *editor_data_load(const char *p_data)
73     {
74     EDITOR_DATA *p_editor_data;
75 sysadm 1.4 char *p_data_line = NULL;
76 sysadm 1.22 long line_offsets[MAX_EDITOR_DATA_LINES + 1];
77 sysadm 1.1 long current_data_line_length = 0;
78 sysadm 1.14 long i;
79 sysadm 1.1
80     if (p_data == NULL)
81     {
82 sysadm 1.46 log_error("NULL pointer error\n");
83 sysadm 1.1 return NULL;
84     }
85    
86 sysadm 1.16 p_editor_data = memory_pool_alloc(p_mp_editor_data);
87 sysadm 1.1 if (p_editor_data == NULL)
88     {
89 sysadm 1.16 log_error("memory_pool_alloc() error\n");
90 sysadm 1.1 return NULL;
91     }
92    
93 sysadm 1.39 p_editor_data->display_line_total = split_data_lines(p_data, SCREEN_COLS, line_offsets, MAX_EDITOR_DATA_LINES + 1,
94     0, p_editor_data->display_line_widths);
95 sysadm 1.1
96     for (i = 0; i < p_editor_data->display_line_total; i++)
97     {
98     p_editor_data->display_line_lengths[i] = line_offsets[i + 1] - line_offsets[i];
99    
100     if (i == 0 ||
101 sysadm 1.2 current_data_line_length + p_editor_data->display_line_lengths[i] + 1 > MAX_EDITOR_DATA_LINE_LENGTH ||
102 sysadm 1.1 (p_editor_data->display_line_lengths[i - 1] > 0 && p_data[line_offsets[i - 1] + p_editor_data->display_line_lengths[i - 1] - 1] == '\n'))
103     {
104     // Allocate new data line
105 sysadm 1.16 p_data_line = memory_pool_alloc(p_mp_data_line);
106 sysadm 1.4 if (p_data_line == NULL)
107 sysadm 1.1 {
108 sysadm 1.16 log_error("memory_pool_alloc() error: i = %d\n", i);
109 sysadm 1.1 // Cleanup
110 sysadm 1.14 editor_data_cleanup(p_editor_data);
111 sysadm 1.1 return NULL;
112     }
113    
114 sysadm 1.4 p_editor_data->p_display_lines[i] = p_data_line;
115 sysadm 1.2 current_data_line_length = 0;
116 sysadm 1.1 }
117     else
118     {
119     p_editor_data->p_display_lines[i] = p_editor_data->p_display_lines[i - 1] + p_editor_data->display_line_lengths[i - 1];
120     }
121    
122     memcpy(p_editor_data->p_display_lines[i], p_data + line_offsets[i], (size_t)p_editor_data->display_line_lengths[i]);
123     current_data_line_length += p_editor_data->display_line_lengths[i];
124 sysadm 1.19
125     // Trim \n from last line
126 sysadm 1.20 if (i + 1 == p_editor_data->display_line_total &&
127     p_editor_data->display_line_lengths[i] > 0 &&
128 sysadm 1.19 p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n')
129     {
130     p_editor_data->display_line_lengths[i]--;
131 sysadm 1.39 p_editor_data->display_line_widths[i]--;
132 sysadm 1.19 current_data_line_length--;
133     }
134 sysadm 1.4 p_data_line[current_data_line_length] = '\0';
135 sysadm 1.1 }
136    
137 sysadm 1.26 memset(p_editor_data->p_display_lines + p_editor_data->display_line_total, 0, MAX_EDITOR_DATA_LINES - (size_t)p_editor_data->display_line_total);
138 sysadm 1.4
139 sysadm 1.1 return p_editor_data;
140     }
141    
142     long editor_data_save(const EDITOR_DATA *p_editor_data, char *p_data, size_t buf_len)
143     {
144     long current_pos = 0;
145     long i;
146    
147     if (p_editor_data == NULL || p_data == NULL)
148     {
149 sysadm 1.46 log_error("NULL pointer error\n");
150 sysadm 1.1 return -1;
151     }
152    
153     for (i = 0; i < p_editor_data->display_line_total; i++)
154     {
155     if (current_pos + p_editor_data->display_line_lengths[i] + 1 > buf_len)
156     {
157     log_error("Data buffer not longer enough %d > %d\n", current_pos + p_editor_data->display_line_lengths[i] + 1, buf_len);
158     p_data[current_pos] = '\0';
159     return -2;
160     }
161    
162     memcpy(p_data + current_pos, p_editor_data->p_display_lines[i], (size_t)p_editor_data->display_line_lengths[i]);
163     current_pos += p_editor_data->display_line_lengths[i];
164     }
165    
166     p_data[current_pos] = '\0';
167    
168     return current_pos;
169     }
170    
171     void editor_data_cleanup(EDITOR_DATA *p_editor_data)
172     {
173 sysadm 1.14 char *p_data_line = NULL;
174 sysadm 1.1 long i;
175    
176     if (p_editor_data == NULL)
177     {
178     return;
179     }
180    
181 sysadm 1.14 for (i = 0; i < p_editor_data->display_line_total; i++)
182     {
183     if (p_data_line == NULL)
184     {
185     p_data_line = p_editor_data->p_display_lines[i];
186     }
187    
188     if (p_editor_data->display_line_lengths[i] > 0 &&
189     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n')
190     {
191 sysadm 1.16 memory_pool_free(p_mp_data_line, p_data_line);
192 sysadm 1.14 p_data_line = NULL;
193     }
194     }
195    
196     if (p_data_line != NULL)
197 sysadm 1.1 {
198 sysadm 1.16 memory_pool_free(p_mp_data_line, p_data_line);
199 sysadm 1.1 }
200    
201 sysadm 1.16 memory_pool_free(p_mp_editor_data, p_editor_data);
202 sysadm 1.1 }
203    
204 sysadm 1.3 int editor_data_insert(EDITOR_DATA *p_editor_data, long *p_display_line, long *p_offset,
205 sysadm 1.2 const char *str, int str_len, long *p_last_updated_line)
206     {
207 sysadm 1.3 long display_line = *p_display_line;
208     long offset = *p_offset;
209 sysadm 1.4 char *p_data_line = NULL;
210 sysadm 1.2 long len_data_line;
211     long offset_data_line;
212     long last_display_line; // of data line
213 sysadm 1.4 long line_offsets[MAX_EDITOR_DATA_LINE_LENGTH + 1];
214 sysadm 1.39 int line_widths[MAX_EDITOR_DATA_LINE_LENGTH + 1];
215 sysadm 1.4 long split_line_total;
216 sysadm 1.32 long i;
217 sysadm 1.15 int len;
218     int eol;
219     int display_len;
220 sysadm 1.2
221     if (p_editor_data == NULL || p_last_updated_line == NULL)
222     {
223 sysadm 1.46 log_error("NULL pointer error\n");
224 sysadm 1.2 return -1;
225     }
226    
227     // Get length of current data line
228     len_data_line = 0;
229     p_data_line = p_editor_data->p_display_lines[display_line];
230     for (i = display_line - 1; i >= 0; i--)
231     {
232     if (p_editor_data->display_line_lengths[i] > 0 &&
233     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of prior data line
234     {
235     break;
236     }
237    
238     len_data_line += p_editor_data->display_line_lengths[i];
239     p_data_line = p_editor_data->p_display_lines[i];
240     }
241     offset_data_line = len_data_line + offset;
242     last_display_line = p_editor_data->display_line_total - 1;
243     for (i = display_line; i < p_editor_data->display_line_total; i++)
244     {
245     len_data_line += p_editor_data->display_line_lengths[i];
246    
247     if (p_editor_data->display_line_lengths[i] > 0 &&
248     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
249     {
250     last_display_line = i;
251     break;
252     }
253     }
254    
255     // Split current data line if over-length
256 sysadm 1.37 if (len_data_line + str_len + 2 > MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
257 sysadm 1.2 {
258 sysadm 1.14 if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
259 sysadm 1.2 {
260 sysadm 1.29 #ifdef _DEBUG
261     log_error("Split line error, display_line_total(%ld) reach limit(%d)\n",
262     p_editor_data->display_line_total, MAX_EDITOR_DATA_LINES);
263     #endif
264    
265 sysadm 1.2 return -2;
266     }
267    
268     // Allocate new data line
269 sysadm 1.16 p_data_line = memory_pool_alloc(p_mp_data_line);
270 sysadm 1.4 if (p_data_line == NULL)
271 sysadm 1.2 {
272 sysadm 1.16 log_error("memory_pool_alloc() error\n");
273 sysadm 1.2 return -2;
274     }
275 sysadm 1.3
276 sysadm 1.37 if (offset_data_line + str_len + 2 >= MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
277 sysadm 1.2 {
278 sysadm 1.6 if (str[0] == CR)
279     {
280     str_len = 0;
281     }
282 sysadm 1.3
283 sysadm 1.4 // Copy str to new data line
284     memcpy(p_data_line, str, (size_t)str_len);
285    
286     // Copy rest part of current data line to new data line
287     memcpy(p_data_line + str_len,
288 sysadm 1.2 p_editor_data->p_display_lines[display_line] + offset,
289 sysadm 1.4 (size_t)(len_data_line - offset_data_line));
290    
291     p_data_line[str_len + len_data_line - offset_data_line] = '\0';
292 sysadm 1.2
293     // Add line ending to current display line (data line)
294     p_editor_data->p_display_lines[display_line][offset] = '\n';
295     p_editor_data->p_display_lines[display_line][offset + 1] = '\0';
296     p_editor_data->display_line_lengths[display_line] = offset + 1;
297 sysadm 1.4
298     *p_display_line = display_line + 1;
299     *p_offset = str_len;
300 sysadm 1.2 }
301 sysadm 1.6 else
302     {
303     // Copy rest part of current data line to new data line
304     memcpy(p_data_line,
305     p_editor_data->p_display_lines[display_line] + offset,
306     (size_t)(len_data_line - offset_data_line));
307    
308     p_data_line[len_data_line - offset_data_line] = '\0';
309    
310     // Append str to current display line
311     memcpy(p_editor_data->p_display_lines[display_line] + offset, str, (size_t)str_len);
312    
313     // Add line ending to current display line (data line)
314     p_editor_data->p_display_lines[display_line][offset + str_len] = '\n';
315     p_editor_data->p_display_lines[display_line][offset + str_len + 1] = '\0';
316     p_editor_data->display_line_lengths[display_line] = offset + str_len + 1;
317    
318     *p_display_line = display_line;
319     *p_offset = offset + str_len;
320     }
321 sysadm 1.2
322 sysadm 1.39 // Update display width of current display line
323     len = split_line(p_editor_data->p_display_lines[display_line], SCREEN_COLS, &eol, &display_len, 0);
324     p_editor_data->display_line_widths[display_line] = display_len;
325    
326 sysadm 1.4 split_line_total = last_display_line - display_line + 3;
327    
328     // Set start display_line for spliting new data line
329 sysadm 1.2 display_line++;
330 sysadm 1.4
331     *p_last_updated_line = p_editor_data->display_line_total;
332 sysadm 1.2 }
333 sysadm 1.4 else // insert str into current data line at offset_data_line
334 sysadm 1.2 {
335 sysadm 1.4 memmove(p_data_line + offset_data_line + str_len, p_data_line + offset_data_line, (size_t)(len_data_line - offset_data_line));
336     memcpy(p_data_line + offset_data_line, str, (size_t)str_len);
337     p_data_line[len_data_line + str_len] = '\0';
338 sysadm 1.3
339 sysadm 1.4 // Set p_data_line to head of current display line
340     p_data_line = p_editor_data->p_display_lines[display_line];
341     split_line_total = last_display_line - display_line + 3;
342 sysadm 1.3
343 sysadm 1.4 *p_display_line = display_line;
344     *p_offset = offset + str_len;
345 sysadm 1.2 }
346    
347 sysadm 1.4 // Split current data line since beginning of current display line
348 sysadm 1.39 split_line_total = split_data_lines(p_data_line, SCREEN_COLS, line_offsets, split_line_total, 0, line_widths);
349 sysadm 1.2
350 sysadm 1.4 for (i = 0; i < split_line_total; i++)
351 sysadm 1.2 {
352 sysadm 1.4 if (display_line + i > last_display_line)
353 sysadm 1.2 {
354 sysadm 1.4 // Insert blank display line after last_display_line
355     if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
356     {
357 sysadm 1.29 #ifdef _DEBUG
358     log_error("display_line_total over limit %d >= %d\n", p_editor_data->display_line_total, MAX_EDITOR_DATA_LINES);
359     #endif
360    
361 sysadm 1.15 // Terminate prior display line with \n, to avoid error on cleanup
362     if (display_line + i - 1 >= 0 && p_editor_data->display_line_lengths[display_line + i - 1] > 0)
363     {
364 sysadm 1.24 len = split_line(p_editor_data->p_display_lines[display_line + i - 1], SCREEN_COLS - 1, &eol, &display_len, 0);
365 sysadm 1.15 p_editor_data->p_display_lines[display_line + i - 1][len] = '\n';
366     p_editor_data->p_display_lines[display_line + i - 1][len + 1] = '\0';
367     p_editor_data->display_line_lengths[display_line + i - 1] = len + 1;
368 sysadm 1.39 p_editor_data->display_line_widths[display_line + i - 1] = display_len;
369 sysadm 1.15 }
370     if (*p_offset >= p_editor_data->display_line_lengths[*p_display_line])
371     {
372     *p_offset = p_editor_data->display_line_lengths[*p_display_line] - 1;
373     }
374     break;
375 sysadm 1.4 }
376 sysadm 1.32
377     // for (j = p_editor_data->display_line_total; j > last_display_line + 1; j--)
378     // {
379     // p_editor_data->p_display_lines[j] = p_editor_data->p_display_lines[j - 1];
380     // p_editor_data->display_line_lengths[j] = p_editor_data->display_line_lengths[j - 1];
381 sysadm 1.39 // p_editor_data->display_line_widths[j] = p_editor_data->display_line_widths[j - 1];
382 sysadm 1.32 // }
383     memmove(p_editor_data->p_display_lines + last_display_line + 2,
384     p_editor_data->p_display_lines + last_display_line + 1,
385     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
386     sizeof(p_editor_data->p_display_lines[last_display_line + 1]));
387     memmove(p_editor_data->display_line_lengths + last_display_line + 2,
388     p_editor_data->display_line_lengths + last_display_line + 1,
389     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
390     sizeof(p_editor_data->display_line_lengths[last_display_line + 1]));
391 sysadm 1.39 memmove(p_editor_data->display_line_widths + last_display_line + 2,
392     p_editor_data->display_line_widths + last_display_line + 1,
393     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
394     sizeof(p_editor_data->display_line_widths[last_display_line + 1]));
395 sysadm 1.32
396 sysadm 1.4 last_display_line++;
397 sysadm 1.32 *p_last_updated_line = p_editor_data->display_line_total;
398 sysadm 1.4 (p_editor_data->display_line_total)++;
399 sysadm 1.2 }
400    
401 sysadm 1.4 p_editor_data->display_line_lengths[display_line + i] = line_offsets[i + 1] - line_offsets[i];
402 sysadm 1.39 p_editor_data->display_line_widths[display_line + i] = line_widths[i];
403 sysadm 1.4 p_editor_data->p_display_lines[display_line + i] =
404     (i == 0
405     ? p_data_line
406     : (p_editor_data->p_display_lines[display_line + i - 1] + p_editor_data->display_line_lengths[display_line + i - 1]));
407 sysadm 1.2
408 sysadm 1.4 if (p_editor_data->display_line_lengths[display_line + i] > 0 &&
409     p_editor_data->p_display_lines[display_line + i][p_editor_data->display_line_lengths[display_line + i] - 1] == '\n')
410 sysadm 1.3 {
411 sysadm 1.4 break;
412 sysadm 1.3 }
413 sysadm 1.4 }
414 sysadm 1.3
415 sysadm 1.7 *p_last_updated_line = MAX(display_line + MIN(i, split_line_total - 1), *p_last_updated_line);
416 sysadm 1.2
417 sysadm 1.14 if (*p_offset >= p_editor_data->display_line_lengths[*p_display_line])
418 sysadm 1.3 {
419 sysadm 1.18 if (*p_display_line + 1 < p_editor_data->display_line_total)
420 sysadm 1.15 {
421 sysadm 1.18 *p_offset -= p_editor_data->display_line_lengths[*p_display_line];
422 sysadm 1.15 (*p_display_line)++;
423     }
424 sysadm 1.22 }
425    
426     // Prevent the last display line from being over-length
427     if (p_editor_data->display_line_total == MAX_EDITOR_DATA_LINES)
428     {
429 sysadm 1.24 len = split_line(p_editor_data->p_display_lines[p_editor_data->display_line_total - 1], SCREEN_COLS - 1, &eol, &display_len, 0);
430 sysadm 1.22 p_editor_data->p_display_lines[p_editor_data->display_line_total - 1][len] = '\0';
431     p_editor_data->display_line_lengths[p_editor_data->display_line_total - 1] = len;
432 sysadm 1.39 p_editor_data->display_line_widths[p_editor_data->display_line_total - 1] = display_len;
433 sysadm 1.22 if (*p_display_line + 1 >= p_editor_data->display_line_total)
434 sysadm 1.20 {
435 sysadm 1.22 *p_offset = MIN(*p_offset, len);
436     *p_display_line = p_editor_data->display_line_total - 1;
437 sysadm 1.20 }
438 sysadm 1.3 }
439    
440 sysadm 1.4 return 0;
441 sysadm 1.2 }
442    
443 sysadm 1.23 int editor_data_delete(EDITOR_DATA *p_editor_data, long *p_display_line, long *p_offset,
444 sysadm 1.49 long *p_last_updated_line, int del_line)
445 sysadm 1.2 {
446 sysadm 1.23 long display_line = *p_display_line;
447     long offset = *p_offset;
448 sysadm 1.7 char *p_data_line = NULL;
449     long len_data_line;
450     long offset_data_line;
451     long last_display_line; // of data line
452     long line_offsets[MAX_EDITOR_DATA_LINE_LENGTH + 1];
453 sysadm 1.39 int line_widths[MAX_EDITOR_DATA_LINE_LENGTH + 1];
454 sysadm 1.7 long split_line_total;
455     long i, j;
456     int str_len = 0;
457 sysadm 1.39 char c;
458 sysadm 1.7
459     if (p_editor_data == NULL || p_last_updated_line == NULL)
460     {
461 sysadm 1.46 log_error("NULL pointer error\n");
462 sysadm 1.7 return -1;
463     }
464    
465     // Get length of current data line
466     len_data_line = 0;
467     p_data_line = p_editor_data->p_display_lines[display_line];
468     for (i = display_line - 1; i >= 0; i--)
469     {
470     if (p_editor_data->display_line_lengths[i] > 0 &&
471     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of prior data line
472     {
473     break;
474     }
475    
476     len_data_line += p_editor_data->display_line_lengths[i];
477     p_data_line = p_editor_data->p_display_lines[i];
478     }
479     offset_data_line = len_data_line + offset;
480     last_display_line = p_editor_data->display_line_total - 1;
481     for (i = display_line; i < p_editor_data->display_line_total; i++)
482     {
483     len_data_line += p_editor_data->display_line_lengths[i];
484    
485     if (p_editor_data->display_line_lengths[i] > 0 &&
486     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
487     {
488     last_display_line = i;
489     break;
490     }
491     }
492    
493 sysadm 1.18 if (offset_data_line >= len_data_line) // end-of-line
494     {
495     return 0;
496     }
497    
498 sysadm 1.7 // Check str to be deleted
499 sysadm 1.49 if (del_line)
500     {
501     str_len = (int)(p_editor_data->display_line_lengths[display_line] - offset);
502     }
503     else if (p_data_line[offset_data_line] > 0 && p_data_line[offset_data_line] < 127)
504 sysadm 1.7 {
505     str_len = 1;
506     }
507 sysadm 1.48 else if (p_data_line[offset_data_line] & 0x80) // head of multi-byte character
508 sysadm 1.7 {
509 sysadm 1.39 str_len = 1;
510 sysadm 1.48 c = (p_data_line[offset_data_line] & 0x70) << 1;
511     while (c & 0x80)
512 sysadm 1.39 {
513     str_len++;
514 sysadm 1.48 c = (c & 0x7f) << 1;
515 sysadm 1.39 }
516 sysadm 1.7 }
517     else
518     {
519 sysadm 1.18 log_error("Some strange character at display_line %ld, offset %ld: %d %d\n",
520     display_line, offset, p_data_line[offset_data_line], p_data_line[offset_data_line + 1]);
521 sysadm 1.10 str_len = 1;
522 sysadm 1.7 }
523    
524     // Current display line is (almost) empty
525     if (offset_data_line + str_len > len_data_line ||
526 sysadm 1.49 (offset_data_line + str_len == len_data_line &&
527     p_data_line[del_line ? len_data_line - 1 : offset_data_line] == '\n'))
528 sysadm 1.7 {
529 sysadm 1.9 if (display_line + 1 >= p_editor_data->display_line_total) // No additional display line (data line)
530     {
531     return 0;
532     }
533    
534     len_data_line = 0; // Next data line
535     last_display_line = p_editor_data->display_line_total - 1;
536     for (i = display_line + 1; i < p_editor_data->display_line_total; i++)
537     {
538     len_data_line += p_editor_data->display_line_lengths[i];
539    
540     if (p_editor_data->display_line_lengths[i] > 0 &&
541     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
542     {
543     last_display_line = i;
544     break;
545     }
546     }
547    
548     if (offset_data_line + len_data_line + 1 > MAX_EDITOR_DATA_LINE_LENGTH) // No enough buffer to merge current data line with next data line
549     {
550     return 0;
551     }
552    
553     // Append next data line to current one
554     memcpy(p_data_line + offset_data_line, p_editor_data->p_display_lines[display_line + 1], (size_t)len_data_line);
555     p_data_line[offset_data_line + len_data_line] = '\0';
556    
557     // Recycle next data line
558 sysadm 1.16 memory_pool_free(p_mp_data_line, p_editor_data->p_display_lines[display_line + 1]);
559 sysadm 1.9 }
560     else
561     {
562     memmove(p_data_line + offset_data_line, p_data_line + offset_data_line + str_len, (size_t)(len_data_line - offset_data_line - str_len));
563     p_data_line[len_data_line - str_len] = '\0';
564     len_data_line -= str_len;
565 sysadm 1.7 }
566    
567     // Set p_data_line to head of current display line
568     p_data_line = p_editor_data->p_display_lines[display_line];
569     split_line_total = last_display_line - display_line + 2;
570    
571     // Split current data line since beginning of current display line
572 sysadm 1.39 split_line_total = split_data_lines(p_data_line, SCREEN_COLS, line_offsets, split_line_total, 0, line_widths);
573 sysadm 1.7
574     for (i = 0; i < split_line_total; i++)
575     {
576     p_editor_data->display_line_lengths[display_line + i] = line_offsets[i + 1] - line_offsets[i];
577 sysadm 1.39 p_editor_data->display_line_widths[display_line + i] = line_widths[i];
578 sysadm 1.7 p_editor_data->p_display_lines[display_line + i] =
579     (i == 0
580     ? p_data_line
581     : (p_editor_data->p_display_lines[display_line + i - 1] + p_editor_data->display_line_lengths[display_line + i - 1]));
582    
583     if (p_editor_data->display_line_lengths[display_line + i] > 0 &&
584     p_editor_data->p_display_lines[display_line + i][p_editor_data->display_line_lengths[display_line + i] - 1] == '\n')
585     {
586     break;
587     }
588     }
589    
590     *p_last_updated_line = display_line + MIN(i, split_line_total - 1);
591    
592 sysadm 1.18 if (*p_last_updated_line < last_display_line)
593 sysadm 1.7 {
594     // Remove redundant display line after last_display_line
595 sysadm 1.32 // for (j = last_display_line + 1; j < p_editor_data->display_line_total; j++)
596     // {
597     // p_editor_data->p_display_lines[j - (last_display_line - *p_last_updated_line)] = p_editor_data->p_display_lines[j];
598     // p_editor_data->display_line_lengths[j - (last_display_line - *p_last_updated_line)] = p_editor_data->display_line_lengths[j];
599 sysadm 1.39 // p_editor_data->display_line_widths[j - (last_display_line - *p_last_updated_line)] = p_editor_data->display_line_widths[j];
600 sysadm 1.32 // }
601     memmove(p_editor_data->p_display_lines + *p_last_updated_line + 1,
602     p_editor_data->p_display_lines + last_display_line + 1,
603     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
604     sizeof(p_editor_data->p_display_lines[last_display_line + 1]));
605     memmove(p_editor_data->display_line_lengths + *p_last_updated_line + 1,
606     p_editor_data->display_line_lengths + last_display_line + 1,
607     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
608     sizeof(p_editor_data->display_line_lengths[last_display_line + 1]));
609 sysadm 1.39 memmove(p_editor_data->display_line_widths + *p_last_updated_line + 1,
610     p_editor_data->display_line_widths + last_display_line + 1,
611     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
612     sizeof(p_editor_data->display_line_widths[last_display_line + 1]));
613 sysadm 1.7
614 sysadm 1.18 j = p_editor_data->display_line_total;
615     (p_editor_data->display_line_total) -= (last_display_line - *p_last_updated_line);
616     *p_last_updated_line = MAX(j - 1, *p_last_updated_line);
617 sysadm 1.7 }
618    
619 sysadm 1.23 // Return real offset
620     *p_offset = offset;
621    
622 sysadm 1.9 return str_len;
623 sysadm 1.2 }
624    
625     static int editor_display_key_handler(int *p_key, EDITOR_CTX *p_ctx)
626 sysadm 1.1 {
627     switch (*p_key)
628     {
629     case 0: // Set msg
630     snprintf(p_ctx->msg, sizeof(p_ctx->msg),
631 sysadm 1.39 "| 退出[\033[32mCtrl-W\033[33m] |");
632 sysadm 1.1 break;
633 sysadm 1.24 case KEY_CSI:
634     *p_key = KEY_ESC;
635     break;
636 sysadm 1.1 }
637    
638     return 0;
639     }
640    
641     int editor_display(EDITOR_DATA *p_editor_data)
642     {
643     static int show_help = 1;
644     char buffer[MAX_EDITOR_DATA_LINE_LENGTH];
645 sysadm 1.2 EDITOR_CTX ctx;
646 sysadm 1.1 int ch = 0;
647 sysadm 1.4 char input_str[4];
648 sysadm 1.39 char c;
649 sysadm 1.3 int str_len = 0;
650     int input_ok;
651     const int screen_begin_row = 1;
652 sysadm 1.14 const int screen_row_total = SCREEN_ROWS - screen_begin_row;
653     int output_current_row = screen_begin_row;
654     int output_end_row = SCREEN_ROWS - 1;
655 sysadm 1.1 long int line_current = 0;
656     long int len;
657     int loop;
658     int eol, display_len;
659     long row_pos = 1, col_pos = 1;
660 sysadm 1.3 long display_line_in, offset_in;
661     long display_line_out, offset_out;
662     int scroll_rows;
663 sysadm 1.2 long last_updated_line = 0;
664 sysadm 1.8 int key_insert = 1;
665 sysadm 1.12 int i, j;
666     char *p_str;
667 sysadm 1.49 int del_line;
668 sysadm 1.1
669 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
670 sysadm 1.1
671     // update msg_ext with extended key handler
672     if (editor_display_key_handler(&ch, &ctx) != 0)
673     {
674     return ch;
675     }
676    
677 sysadm 1.35 for (loop = 1; !SYS_server_exit && loop;)
678 sysadm 1.1 {
679 sysadm 1.14 if (line_current >= p_editor_data->display_line_total || output_current_row > output_end_row)
680 sysadm 1.1 {
681 sysadm 1.14 ctx.line_cursor = line_current - output_current_row + row_pos + 1;
682 sysadm 1.1
683     snprintf(buffer, sizeof(buffer),
684 sysadm 1.2 "\033[1;44;33m[\033[32m%ld\033[33m;\033[32m%ld\033[33m] "
685 sysadm 1.39 "第\033[32m%ld\033[33m/\033[32m%ld\033[33m行 [\033[32m%s\033[33m] "
686 sysadm 1.2 "%s",
687     row_pos, col_pos,
688     ctx.line_cursor, p_editor_data->display_line_total,
689 sysadm 1.39 key_insert ? "插入" : "替换",
690 sysadm 1.1 ctx.msg);
691    
692 sysadm 1.24 len = split_line(buffer, SCREEN_COLS, &eol, &display_len, 1);
693 sysadm 1.1 for (; display_len < SCREEN_COLS; display_len++)
694     {
695     buffer[len++] = ' ';
696     }
697     buffer[len] = '\0';
698     strncat(buffer, "\033[m", sizeof(buffer) - 1 - strnlen(buffer, sizeof(buffer)));
699    
700     moveto(SCREEN_ROWS, 0);
701     prints("%s", buffer);
702    
703     moveto((int)row_pos, (int)col_pos);
704     iflush();
705    
706 sysadm 1.25 str_len = 0;
707 sysadm 1.53 ch = igetch_t(BBS_max_user_idle_time);
708 sysadm 1.33 while (!SYS_server_exit)
709 sysadm 1.1 {
710 sysadm 1.47 if (ch != KEY_NULL && ch != KEY_TIMEOUT)
711     {
712     BBS_last_access_tm = time(NULL);
713     }
714    
715 sysadm 1.1 // extended key handler
716     if (editor_display_key_handler(&ch, &ctx) != 0)
717     {
718     goto cleanup;
719     }
720    
721 sysadm 1.48 if (ch < 256 && (ch & 0x80)) // head of multi-byte character
722 sysadm 1.3 {
723     str_len = 0;
724 sysadm 1.48 c = (char)(ch & 0xf0);
725     while (c & 0x80)
726 sysadm 1.39 {
727     input_str[str_len] = (char)(ch - 256);
728     str_len++;
729 sysadm 1.48 c = (c & 0x7f) << 1;
730 sysadm 1.39
731 sysadm 1.48 if ((c & 0x80) == 0) // Input completed
732 sysadm 1.39 {
733     break;
734     }
735    
736     // Expect additional bytes of input
737     ch = igetch(100); // 0.1 second
738     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Ignore received bytes if no futher input
739     {
740 sysadm 1.40 #ifdef _DEBUG
741 sysadm 1.39 log_error("Ignore %d bytes of incomplete UTF8 character\n", str_len);
742 sysadm 1.40 #endif
743 sysadm 1.39 str_len = 0;
744     break;
745     }
746     }
747 sysadm 1.3 }
748    
749 sysadm 1.39 if ((ch >= 32 && ch < 127) || str_len >= 2 || // Printable character or multi-byte character
750     ch == CR || ch == KEY_ESC) // Special character
751 sysadm 1.2 {
752 sysadm 1.43 // Refresh current action while user input
753     if (user_online_update(NULL) < 0)
754     {
755     log_error("user_online_update(NULL) error\n");
756     }
757    
758 sysadm 1.21 if (str_len == 0) // ch >= 32 && ch < 127
759 sysadm 1.3 {
760 sysadm 1.4 input_str[0] = (char)ch;
761 sysadm 1.3 str_len = 1;
762     }
763    
764 sysadm 1.14 display_line_in = line_current - output_current_row + row_pos;
765 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[display_line_in], (int)col_pos - 1, &eol, &display_len, 0);
766 sysadm 1.3 display_line_out = display_line_in;
767     offset_out = offset_in;
768 sysadm 1.2
769 sysadm 1.32 last_updated_line = display_line_in;
770    
771 sysadm 1.8 if (!key_insert) // overwrite
772     {
773 sysadm 1.23 if (editor_data_delete(p_editor_data, &display_line_out, &offset_out,
774 sysadm 1.49 &last_updated_line, 0) < 0)
775 sysadm 1.8 {
776     log_error("editor_data_delete() error\n");
777     }
778     }
779    
780 sysadm 1.3 if (editor_data_insert(p_editor_data, &display_line_out, &offset_out,
781 sysadm 1.4 input_str, str_len, &last_updated_line) < 0)
782 sysadm 1.2 {
783 sysadm 1.14 log_error("editor_data_insert(str_len=%d) error\n", str_len);
784 sysadm 1.2 }
785     else
786     {
787 sysadm 1.14 output_end_row = MIN(SCREEN_ROWS - 1, output_current_row + (int)(last_updated_line - line_current));
788     line_current -= (output_current_row - row_pos);
789     output_current_row = (int)row_pos;
790 sysadm 1.2
791 sysadm 1.14 scroll_rows = MAX(0, (int)(display_line_out - display_line_in) - (output_end_row - output_current_row));
792 sysadm 1.2
793 sysadm 1.3 if (scroll_rows > 0)
794 sysadm 1.2 {
795 sysadm 1.3 moveto(SCREEN_ROWS, 0);
796     clrtoeol();
797     for (i = 0; i < scroll_rows; i++)
798     {
799 sysadm 1.36 // prints("\033[S"); // Scroll up 1 line
800     prints("\n"); // Legacy Cterm only works with this line
801 sysadm 1.3 }
802 sysadm 1.2
803 sysadm 1.14 output_current_row -= scroll_rows;
804     if (output_current_row < screen_begin_row)
805 sysadm 1.2 {
806 sysadm 1.14 line_current += (screen_begin_row - output_current_row);
807     output_current_row = screen_begin_row;
808 sysadm 1.2 }
809 sysadm 1.14 row_pos = output_end_row;
810 sysadm 1.3 }
811     else // if (scroll_lines == 0)
812     {
813     row_pos += (display_line_out - display_line_in);
814 sysadm 1.2 }
815 sysadm 1.39
816     if (offset_out != offset_in)
817     {
818     if (display_line_out != display_line_in)
819     {
820     col_pos = 1;
821     }
822 sysadm 1.42 if (offset_out > 0)
823 sysadm 1.39 {
824     col_pos += (str_len == 1 ? 1 : 2);
825     }
826     }
827 sysadm 1.11 }
828 sysadm 1.3
829 sysadm 1.25 if (display_line_out != display_line_in) // Output on line change
830     {
831     break;
832     }
833    
834     ch = igetch(0);
835     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Output if no futher input
836     {
837     break;
838     }
839    
840 sysadm 1.21 str_len = 0;
841 sysadm 1.11 continue;
842 sysadm 1.2 }
843 sysadm 1.49 else if (ch == KEY_DEL || ch == BACKSPACE || ch == Ctrl('K') || ch == Ctrl('Y')) // Del
844 sysadm 1.2 {
845 sysadm 1.43 // Refresh current action while user input
846     if (user_online_update(NULL) < 0)
847     {
848     log_error("user_online_update(NULL) error\n");
849     }
850    
851 sysadm 1.49 del_line = 0;
852    
853 sysadm 1.9 if (ch == BACKSPACE)
854     {
855 sysadm 1.18 if (line_current - output_current_row + row_pos <= 0 && col_pos <= 1) // Forbidden
856     {
857 sysadm 1.34 break; // force output prior operation result if any
858 sysadm 1.18 }
859    
860 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
861     (int)col_pos - 1, &eol, &display_len, 0);
862     if (offset_in >= 1 && p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in - 1] < 0) // UTF8
863     {
864     col_pos = display_len - 1;
865     }
866     else
867 sysadm 1.23 {
868 sysadm 1.39 col_pos = display_len;
869 sysadm 1.23 }
870    
871 sysadm 1.14 if (col_pos < 1 && line_current - output_current_row + row_pos >= 0)
872 sysadm 1.9 {
873     row_pos--;
874 sysadm 1.39 col_pos = MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]);
875 sysadm 1.9 }
876     }
877 sysadm 1.49 else if (ch == Ctrl('K'))
878     {
879     del_line = 1;
880     }
881     else if (ch == Ctrl('Y'))
882     {
883     col_pos = 1;
884     del_line = 1;
885     }
886 sysadm 1.2
887 sysadm 1.23 display_line_in = line_current - output_current_row + row_pos;
888 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[display_line_in], (int)col_pos - 1, &eol, &display_len, 0);
889 sysadm 1.23 display_line_out = display_line_in;
890     offset_out = offset_in;
891    
892     if ((str_len = editor_data_delete(p_editor_data, &display_line_out, &offset_out,
893 sysadm 1.49 &last_updated_line, del_line)) < 0)
894 sysadm 1.2 {
895 sysadm 1.49 log_error("editor_data_delete() error: %d\n", str_len);
896 sysadm 1.2 }
897     else
898     {
899 sysadm 1.39 col_pos = display_len + 1; // Set col_pos to accurate pos
900 sysadm 1.9
901 sysadm 1.14 output_end_row = MIN(SCREEN_ROWS - 1, output_current_row + (int)(last_updated_line - line_current));
902     line_current -= (output_current_row - row_pos);
903     output_current_row = (int)row_pos;
904 sysadm 1.9
905 sysadm 1.14 if (output_current_row < screen_begin_row) // row_pos <= 0
906 sysadm 1.9 {
907 sysadm 1.14 output_current_row = screen_begin_row;
908 sysadm 1.9 row_pos = screen_begin_row;
909 sysadm 1.14 output_end_row = SCREEN_ROWS - 1;
910     }
911    
912     // Exceed end
913     if (line_current + (screen_row_total - output_current_row) >= p_editor_data->display_line_total &&
914     p_editor_data->display_line_total > screen_row_total)
915     {
916     scroll_rows = (int)((line_current - (output_current_row - screen_begin_row)) -
917     (p_editor_data->display_line_total - screen_row_total));
918    
919     line_current = p_editor_data->display_line_total - screen_row_total;
920     row_pos += scroll_rows;
921     output_current_row = screen_begin_row;
922     output_end_row = SCREEN_ROWS - 1;
923 sysadm 1.9 }
924 sysadm 1.18
925     clrline(output_current_row, output_end_row);
926 sysadm 1.2 }
927    
928 sysadm 1.25 if (display_line_out != display_line_in) // Output on line change
929     {
930     break;
931     }
932    
933     ch = igetch(0);
934     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Output if no futher input
935     {
936     break;
937     }
938    
939 sysadm 1.21 str_len = 0;
940 sysadm 1.2 continue;
941     }
942    
943 sysadm 1.25 input_ok = 1;
944 sysadm 1.1 switch (ch)
945     {
946     case KEY_NULL:
947 sysadm 1.47 log_error("KEY_NULL\n");
948     goto cleanup;
949 sysadm 1.1 case KEY_TIMEOUT:
950 sysadm 1.47 log_error("User input timeout\n");
951 sysadm 1.1 goto cleanup;
952 sysadm 1.17 case Ctrl('W'):
953 sysadm 1.41 case Ctrl('X'):
954 sysadm 1.1 loop = 0;
955     break;
956 sysadm 1.13 case Ctrl('S'): // Start of line
957 sysadm 1.2 case KEY_CTRL_LEFT:
958 sysadm 1.1 col_pos = 1;
959     break;
960 sysadm 1.13 case Ctrl('E'): // End of line
961 sysadm 1.2 case KEY_CTRL_RIGHT:
962 sysadm 1.23 if (line_current - output_current_row + row_pos == p_editor_data->display_line_total - 1) // row_pos at end line
963 sysadm 1.22 {
964     // last display line does NOT have \n in the end
965 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
966 sysadm 1.22 break;
967     }
968 sysadm 1.39 col_pos = MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]);
969 sysadm 1.1 break;
970 sysadm 1.13 case Ctrl('T'): // Top of screen
971 sysadm 1.2 case KEY_CTRL_UP:
972 sysadm 1.3 row_pos = screen_begin_row;
973 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
974 sysadm 1.2 break;
975 sysadm 1.13 case Ctrl('B'): // Bottom of screen
976 sysadm 1.2 case KEY_CTRL_DOWN:
977 sysadm 1.18 if (p_editor_data->display_line_total < screen_row_total)
978     {
979     row_pos = p_editor_data->display_line_total;
980     }
981     else
982     {
983     row_pos = SCREEN_ROWS - 1;
984     }
985     if (line_current + (screen_row_total - (output_current_row - screen_begin_row)) >= p_editor_data->display_line_total) // Reach end
986     {
987     // last display line does NOT have \n in the end
988 sysadm 1.39 col_pos = MIN(col_pos, p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1);
989 sysadm 1.18 }
990     else
991     {
992 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
993 sysadm 1.18 }
994 sysadm 1.2 break;
995     case KEY_INS:
996 sysadm 1.8 key_insert = !key_insert;
997 sysadm 1.2 break;
998 sysadm 1.1 case KEY_HOME:
999     row_pos = 1;
1000     col_pos = 1;
1001 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1002 sysadm 1.1 {
1003     break;
1004     }
1005     line_current = 0;
1006 sysadm 1.14 output_current_row = screen_begin_row;
1007     output_end_row = SCREEN_ROWS - 1;
1008     clrline(output_current_row, SCREEN_ROWS);
1009 sysadm 1.1 break;
1010     case KEY_END:
1011 sysadm 1.3 if (p_editor_data->display_line_total < screen_row_total)
1012 sysadm 1.1 {
1013     row_pos = p_editor_data->display_line_total;
1014 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1015 sysadm 1.1 break;
1016     }
1017 sysadm 1.3 line_current = p_editor_data->display_line_total - screen_row_total;
1018 sysadm 1.14 output_current_row = screen_begin_row;
1019     output_end_row = SCREEN_ROWS - 1;
1020     row_pos = SCREEN_ROWS - 1;
1021 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1022 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1023 sysadm 1.1 break;
1024     case KEY_LEFT:
1025 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
1026     (int)col_pos - 1, &eol, &display_len, 0);
1027     if (offset_in >= 1 && p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in - 1] < 0) // UTF8
1028     {
1029     col_pos = display_len - 1;
1030     }
1031     else
1032     {
1033     col_pos = display_len;
1034     }
1035     if (col_pos >= 1)
1036 sysadm 1.1 {
1037     break;
1038     }
1039     col_pos = SCREEN_COLS; // continue to KEY_UP
1040     case KEY_UP:
1041 sysadm 1.3 if (row_pos > screen_begin_row)
1042 sysadm 1.1 {
1043     row_pos--;
1044 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1045 sysadm 1.1 break;
1046     }
1047 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1048 sysadm 1.1 {
1049 sysadm 1.2 col_pos = 1;
1050 sysadm 1.1 break;
1051     }
1052 sysadm 1.14 line_current -= output_current_row;
1053     output_current_row = screen_begin_row;
1054 sysadm 1.1 // screen_end_line = begin_line;
1055     // prints("\033[T"); // Scroll down 1 line
1056 sysadm 1.14 output_end_row = SCREEN_ROWS - 1; // Legacy Fterm only works with this line
1057 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1058 sysadm 1.1 break;
1059     case KEY_RIGHT:
1060 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
1061     (int)col_pos - 1, &eol, &display_len, 0);
1062     if (offset_in < p_editor_data->display_line_lengths[line_current - output_current_row + row_pos] &&
1063     p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] < 0) // UTF8
1064     {
1065     col_pos = display_len + 3;
1066     }
1067     else
1068     {
1069     col_pos = display_len + 2;
1070     }
1071     if (col_pos <= p_editor_data->display_line_widths[line_current - output_current_row + row_pos])
1072 sysadm 1.1 {
1073     break;
1074     }
1075     col_pos = 1; // continue to KEY_DOWN
1076     case KEY_DOWN:
1077 sysadm 1.3 if (row_pos < MIN(screen_row_total, p_editor_data->display_line_total))
1078 sysadm 1.1 {
1079     row_pos++;
1080 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1081 sysadm 1.1 break;
1082     }
1083 sysadm 1.23 if (line_current - output_current_row + row_pos == p_editor_data->display_line_total - 1) // row_pos at end line
1084 sysadm 1.1 {
1085 sysadm 1.18 // last display line does NOT have \n in the end
1086 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1087 sysadm 1.1 break;
1088     }
1089 sysadm 1.14 line_current += (screen_row_total - (output_current_row - screen_begin_row));
1090     output_current_row = screen_row_total;
1091     output_end_row = SCREEN_ROWS - 1;
1092 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1093 sysadm 1.1 moveto(SCREEN_ROWS, 0);
1094     clrtoeol();
1095 sysadm 1.36 // prints("\033[S"); // Scroll up 1 line
1096     prints("\n"); // Legacy Cterm only works with this line
1097 sysadm 1.1 break;
1098     case KEY_PGUP:
1099 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1100 sysadm 1.1 {
1101     break;
1102     }
1103 sysadm 1.14 line_current -= ((screen_row_total - 1) + (output_current_row - screen_begin_row));
1104 sysadm 1.1 if (line_current < 0)
1105     {
1106     line_current = 0;
1107     }
1108 sysadm 1.14 output_current_row = screen_begin_row;
1109     output_end_row = SCREEN_ROWS - 1;
1110 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1111 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1112 sysadm 1.1 break;
1113     case KEY_PGDN:
1114 sysadm 1.14 if (line_current + screen_row_total - (output_current_row - screen_begin_row) >= p_editor_data->display_line_total) // Reach end
1115 sysadm 1.1 {
1116     break;
1117     }
1118 sysadm 1.14 line_current += (screen_row_total - 1) - (output_current_row - screen_begin_row);
1119 sysadm 1.3 if (line_current + screen_row_total > p_editor_data->display_line_total) // No enough lines to display
1120 sysadm 1.1 {
1121 sysadm 1.3 line_current = p_editor_data->display_line_total - screen_row_total;
1122 sysadm 1.1 }
1123 sysadm 1.14 output_current_row = screen_begin_row;
1124     output_end_row = SCREEN_ROWS - 1;
1125 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1126 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1127 sysadm 1.1 break;
1128 sysadm 1.44 case Ctrl('Q'):
1129 sysadm 1.1 case KEY_F1:
1130 sysadm 1.50 if (!show_help) // Not re-entrant
1131 sysadm 1.1 {
1132     break;
1133     }
1134     // Display help information
1135     show_help = 0;
1136 sysadm 1.50 display_file(DATA_EDITOR_HELP, 1);
1137 sysadm 1.1 show_help = 1;
1138     case KEY_F5:
1139     // Refresh after display help information
1140 sysadm 1.14 line_current -= (output_current_row - screen_begin_row);
1141     output_current_row = screen_begin_row;
1142     output_end_row = SCREEN_ROWS - 1;
1143     clrline(output_current_row, SCREEN_ROWS);
1144 sysadm 1.1 break;
1145     case 0: // Refresh bottom line
1146     break;
1147     default:
1148     input_ok = 0;
1149     break;
1150     }
1151    
1152 sysadm 1.43 // Refresh current action while user input
1153     if (user_online_update(NULL) < 0)
1154     {
1155     log_error("user_online_update(NULL) error\n");
1156     }
1157    
1158 sysadm 1.14 if (input_ok)
1159 sysadm 1.11 {
1160 sysadm 1.14 break;
1161 sysadm 1.11 }
1162 sysadm 1.25
1163 sysadm 1.53 ch = igetch_t(BBS_max_user_idle_time);
1164 sysadm 1.1 }
1165    
1166     continue;
1167     }
1168    
1169     len = p_editor_data->display_line_lengths[line_current];
1170     if (len >= sizeof(buffer))
1171     {
1172     log_error("Buffer overflow: len=%ld line=%ld \n", len, line_current);
1173     len = sizeof(buffer) - 1;
1174     }
1175     else if (len < 0)
1176     {
1177     log_error("Incorrect line offsets: len=%ld line=%ld \n", len, line_current);
1178     len = 0;
1179     }
1180    
1181 sysadm 1.12 // memcpy(buffer, p_editor_data->p_display_lines[line_current], (size_t)len);
1182     // Replace '\033' with '*'
1183     p_str = p_editor_data->p_display_lines[line_current];
1184     for (i = 0, j = 0; i < len; i++)
1185     {
1186     if (p_str[i] == '\033')
1187     {
1188     memcpy(buffer + j, EDITOR_ESC_DISPLAY_STR, sizeof(EDITOR_ESC_DISPLAY_STR) - 1);
1189     j += (int)(sizeof(EDITOR_ESC_DISPLAY_STR) - 1);
1190     }
1191     else
1192     {
1193     buffer[j] = p_str[i];
1194     j++;
1195     }
1196     }
1197     buffer[j] = '\0';
1198 sysadm 1.1
1199 sysadm 1.14 moveto(output_current_row, 0);
1200 sysadm 1.1 clrtoeol();
1201     prints("%s", buffer);
1202     line_current++;
1203 sysadm 1.14 output_current_row++;
1204 sysadm 1.1 }
1205    
1206     cleanup:
1207     return ch;
1208     }
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