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

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Revision 1.57 - (hide annotations)
Sun Nov 9 11:18:07 2025 UTC (4 months ago) by sysadm
Branch: MAIN
Changes since 1.56: +10 -0 lines
Content type: text/x-csrc 
Replace \t into single space while loading data into editor
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 1.55 #include <wchar.h>
20 sysadm 1.1 #include <sys/param.h>
21    
22 sysadm 1.54 enum _editor_constant_t
23     {
24     EDITOR_MEM_POOL_LINE_PER_CHUNK = 1000,
25     EDITOR_MEM_POOL_CHUNK_LIMIT = (MAX_EDITOR_DATA_LINES / EDITOR_MEM_POOL_LINE_PER_CHUNK + 1),
26     };
27    
28     static const char EDITOR_ESC_DISPLAY_STR[] = "\033[32m*\033[m";
29 sysadm 1.16
30     static MEMORY_POOL *p_mp_data_line;
31     static MEMORY_POOL *p_mp_editor_data;
32    
33     int editor_memory_pool_init(void)
34     {
35     if (p_mp_data_line != NULL || p_mp_editor_data != NULL)
36     {
37     log_error("Editor mem pool already initialized\n");
38     return -1;
39     }
40    
41     p_mp_data_line = memory_pool_init(MAX_EDITOR_DATA_LINE_LENGTH, EDITOR_MEM_POOL_LINE_PER_CHUNK, EDITOR_MEM_POOL_CHUNK_LIMIT);
42     if (p_mp_data_line == NULL)
43     {
44     log_error("Memory pool init error\n");
45     return -2;
46     }
47    
48     p_mp_editor_data = memory_pool_init(sizeof(EDITOR_DATA), 1, 1);
49 sysadm 1.45 if (p_mp_editor_data == NULL)
50 sysadm 1.16 {
51     log_error("Memory pool init error\n");
52     return -3;
53     }
54    
55     return 0;
56     }
57    
58     void editor_memory_pool_cleanup(void)
59     {
60     if (p_mp_data_line != NULL)
61     {
62     memory_pool_cleanup(p_mp_data_line);
63     p_mp_data_line = NULL;
64     }
65    
66     if (p_mp_editor_data != NULL)
67     {
68     memory_pool_cleanup(p_mp_editor_data);
69     p_mp_editor_data = NULL;
70     }
71     }
72 sysadm 1.12
73 sysadm 1.1 EDITOR_DATA *editor_data_load(const char *p_data)
74     {
75     EDITOR_DATA *p_editor_data;
76 sysadm 1.4 char *p_data_line = NULL;
77 sysadm 1.22 long line_offsets[MAX_EDITOR_DATA_LINES + 1];
78 sysadm 1.1 long current_data_line_length = 0;
79 sysadm 1.14 long i;
80 sysadm 1.57 int j;
81 sysadm 1.1
82     if (p_data == NULL)
83     {
84 sysadm 1.46 log_error("NULL pointer error\n");
85 sysadm 1.1 return NULL;
86     }
87    
88 sysadm 1.16 p_editor_data = memory_pool_alloc(p_mp_editor_data);
89 sysadm 1.1 if (p_editor_data == NULL)
90     {
91 sysadm 1.16 log_error("memory_pool_alloc() error\n");
92 sysadm 1.1 return NULL;
93     }
94    
95 sysadm 1.39 p_editor_data->display_line_total = split_data_lines(p_data, SCREEN_COLS, line_offsets, MAX_EDITOR_DATA_LINES + 1,
96     0, p_editor_data->display_line_widths);
97 sysadm 1.1
98     for (i = 0; i < p_editor_data->display_line_total; i++)
99     {
100     p_editor_data->display_line_lengths[i] = line_offsets[i + 1] - line_offsets[i];
101    
102     if (i == 0 ||
103 sysadm 1.2 current_data_line_length + p_editor_data->display_line_lengths[i] + 1 > MAX_EDITOR_DATA_LINE_LENGTH ||
104 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'))
105     {
106     // Allocate new data line
107 sysadm 1.16 p_data_line = memory_pool_alloc(p_mp_data_line);
108 sysadm 1.4 if (p_data_line == NULL)
109 sysadm 1.1 {
110 sysadm 1.16 log_error("memory_pool_alloc() error: i = %d\n", i);
111 sysadm 1.1 // Cleanup
112 sysadm 1.14 editor_data_cleanup(p_editor_data);
113 sysadm 1.1 return NULL;
114     }
115    
116 sysadm 1.4 p_editor_data->p_display_lines[i] = p_data_line;
117 sysadm 1.2 current_data_line_length = 0;
118 sysadm 1.1 }
119     else
120     {
121     p_editor_data->p_display_lines[i] = p_editor_data->p_display_lines[i - 1] + p_editor_data->display_line_lengths[i - 1];
122     }
123    
124     memcpy(p_editor_data->p_display_lines[i], p_data + line_offsets[i], (size_t)p_editor_data->display_line_lengths[i]);
125     current_data_line_length += p_editor_data->display_line_lengths[i];
126 sysadm 1.19
127 sysadm 1.57 // Convert \t to single space
128     for (j = 0; j < p_editor_data->display_line_lengths[i]; j++)
129     {
130     if (p_editor_data->p_display_lines[i][j] == '\t')
131     {
132     p_editor_data->p_display_lines[i][j] = ' ';
133     }
134     }
135    
136 sysadm 1.19 // Trim \n from last line
137 sysadm 1.20 if (i + 1 == p_editor_data->display_line_total &&
138     p_editor_data->display_line_lengths[i] > 0 &&
139 sysadm 1.19 p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n')
140     {
141     p_editor_data->display_line_lengths[i]--;
142 sysadm 1.39 p_editor_data->display_line_widths[i]--;
143 sysadm 1.19 current_data_line_length--;
144     }
145 sysadm 1.4 p_data_line[current_data_line_length] = '\0';
146 sysadm 1.1 }
147    
148 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);
149 sysadm 1.4
150 sysadm 1.1 return p_editor_data;
151     }
152    
153     long editor_data_save(const EDITOR_DATA *p_editor_data, char *p_data, size_t buf_len)
154     {
155     long current_pos = 0;
156     long i;
157    
158     if (p_editor_data == NULL || p_data == NULL)
159     {
160 sysadm 1.46 log_error("NULL pointer error\n");
161 sysadm 1.1 return -1;
162     }
163    
164     for (i = 0; i < p_editor_data->display_line_total; i++)
165     {
166     if (current_pos + p_editor_data->display_line_lengths[i] + 1 > buf_len)
167     {
168     log_error("Data buffer not longer enough %d > %d\n", current_pos + p_editor_data->display_line_lengths[i] + 1, buf_len);
169     p_data[current_pos] = '\0';
170     return -2;
171     }
172    
173     memcpy(p_data + current_pos, p_editor_data->p_display_lines[i], (size_t)p_editor_data->display_line_lengths[i]);
174     current_pos += p_editor_data->display_line_lengths[i];
175     }
176    
177     p_data[current_pos] = '\0';
178    
179     return current_pos;
180     }
181    
182     void editor_data_cleanup(EDITOR_DATA *p_editor_data)
183     {
184 sysadm 1.14 char *p_data_line = NULL;
185 sysadm 1.1 long i;
186    
187     if (p_editor_data == NULL)
188     {
189     return;
190     }
191    
192 sysadm 1.14 for (i = 0; i < p_editor_data->display_line_total; i++)
193     {
194     if (p_data_line == NULL)
195     {
196     p_data_line = p_editor_data->p_display_lines[i];
197     }
198    
199     if (p_editor_data->display_line_lengths[i] > 0 &&
200     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n')
201     {
202 sysadm 1.16 memory_pool_free(p_mp_data_line, p_data_line);
203 sysadm 1.14 p_data_line = NULL;
204     }
205     }
206    
207     if (p_data_line != NULL)
208 sysadm 1.1 {
209 sysadm 1.16 memory_pool_free(p_mp_data_line, p_data_line);
210 sysadm 1.1 }
211    
212 sysadm 1.16 memory_pool_free(p_mp_editor_data, p_editor_data);
213 sysadm 1.1 }
214    
215 sysadm 1.3 int editor_data_insert(EDITOR_DATA *p_editor_data, long *p_display_line, long *p_offset,
216 sysadm 1.2 const char *str, int str_len, long *p_last_updated_line)
217     {
218 sysadm 1.3 long display_line = *p_display_line;
219     long offset = *p_offset;
220 sysadm 1.4 char *p_data_line = NULL;
221 sysadm 1.2 long len_data_line;
222     long offset_data_line;
223     long last_display_line; // of data line
224 sysadm 1.4 long line_offsets[MAX_EDITOR_DATA_LINE_LENGTH + 1];
225 sysadm 1.39 int line_widths[MAX_EDITOR_DATA_LINE_LENGTH + 1];
226 sysadm 1.4 long split_line_total;
227 sysadm 1.32 long i;
228 sysadm 1.15 int len;
229     int eol;
230     int display_len;
231 sysadm 1.2
232     if (p_editor_data == NULL || p_last_updated_line == NULL)
233     {
234 sysadm 1.46 log_error("NULL pointer error\n");
235 sysadm 1.2 return -1;
236     }
237    
238     // Get length of current data line
239     len_data_line = 0;
240     p_data_line = p_editor_data->p_display_lines[display_line];
241     for (i = display_line - 1; i >= 0; i--)
242     {
243     if (p_editor_data->display_line_lengths[i] > 0 &&
244     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of prior data line
245     {
246     break;
247     }
248    
249     len_data_line += p_editor_data->display_line_lengths[i];
250     p_data_line = p_editor_data->p_display_lines[i];
251     }
252     offset_data_line = len_data_line + offset;
253     last_display_line = p_editor_data->display_line_total - 1;
254     for (i = display_line; i < p_editor_data->display_line_total; i++)
255     {
256     len_data_line += p_editor_data->display_line_lengths[i];
257    
258     if (p_editor_data->display_line_lengths[i] > 0 &&
259     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
260     {
261     last_display_line = i;
262     break;
263     }
264     }
265    
266     // Split current data line if over-length
267 sysadm 1.37 if (len_data_line + str_len + 2 > MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
268 sysadm 1.2 {
269 sysadm 1.14 if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
270 sysadm 1.2 {
271 sysadm 1.29 #ifdef _DEBUG
272     log_error("Split line error, display_line_total(%ld) reach limit(%d)\n",
273     p_editor_data->display_line_total, MAX_EDITOR_DATA_LINES);
274     #endif
275    
276 sysadm 1.2 return -2;
277     }
278    
279     // Allocate new data line
280 sysadm 1.16 p_data_line = memory_pool_alloc(p_mp_data_line);
281 sysadm 1.4 if (p_data_line == NULL)
282 sysadm 1.2 {
283 sysadm 1.16 log_error("memory_pool_alloc() error\n");
284 sysadm 1.2 return -2;
285     }
286 sysadm 1.3
287 sysadm 1.37 if (offset_data_line + str_len + 2 >= MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
288 sysadm 1.2 {
289 sysadm 1.6 if (str[0] == CR)
290     {
291     str_len = 0;
292     }
293 sysadm 1.3
294 sysadm 1.4 // Copy str to new data line
295     memcpy(p_data_line, str, (size_t)str_len);
296    
297     // Copy rest part of current data line to new data line
298     memcpy(p_data_line + str_len,
299 sysadm 1.2 p_editor_data->p_display_lines[display_line] + offset,
300 sysadm 1.4 (size_t)(len_data_line - offset_data_line));
301    
302     p_data_line[str_len + len_data_line - offset_data_line] = '\0';
303 sysadm 1.2
304     // Add line ending to current display line (data line)
305     p_editor_data->p_display_lines[display_line][offset] = '\n';
306     p_editor_data->p_display_lines[display_line][offset + 1] = '\0';
307     p_editor_data->display_line_lengths[display_line] = offset + 1;
308 sysadm 1.4
309     *p_display_line = display_line + 1;
310     *p_offset = str_len;
311 sysadm 1.2 }
312 sysadm 1.6 else
313     {
314     // Copy rest part of current data line to new data line
315     memcpy(p_data_line,
316     p_editor_data->p_display_lines[display_line] + offset,
317     (size_t)(len_data_line - offset_data_line));
318    
319     p_data_line[len_data_line - offset_data_line] = '\0';
320    
321     // Append str to current display line
322     memcpy(p_editor_data->p_display_lines[display_line] + offset, str, (size_t)str_len);
323    
324     // Add line ending to current display line (data line)
325     p_editor_data->p_display_lines[display_line][offset + str_len] = '\n';
326     p_editor_data->p_display_lines[display_line][offset + str_len + 1] = '\0';
327     p_editor_data->display_line_lengths[display_line] = offset + str_len + 1;
328    
329     *p_display_line = display_line;
330     *p_offset = offset + str_len;
331     }
332 sysadm 1.2
333 sysadm 1.39 // Update display width of current display line
334     len = split_line(p_editor_data->p_display_lines[display_line], SCREEN_COLS, &eol, &display_len, 0);
335     p_editor_data->display_line_widths[display_line] = display_len;
336    
337 sysadm 1.4 split_line_total = last_display_line - display_line + 3;
338    
339     // Set start display_line for spliting new data line
340 sysadm 1.2 display_line++;
341 sysadm 1.4
342     *p_last_updated_line = p_editor_data->display_line_total;
343 sysadm 1.2 }
344 sysadm 1.4 else // insert str into current data line at offset_data_line
345 sysadm 1.2 {
346 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));
347     memcpy(p_data_line + offset_data_line, str, (size_t)str_len);
348     p_data_line[len_data_line + str_len] = '\0';
349 sysadm 1.3
350 sysadm 1.4 // Set p_data_line to head of current display line
351     p_data_line = p_editor_data->p_display_lines[display_line];
352     split_line_total = last_display_line - display_line + 3;
353 sysadm 1.3
354 sysadm 1.4 *p_display_line = display_line;
355     *p_offset = offset + str_len;
356 sysadm 1.2 }
357    
358 sysadm 1.4 // Split current data line since beginning of current display line
359 sysadm 1.39 split_line_total = split_data_lines(p_data_line, SCREEN_COLS, line_offsets, split_line_total, 0, line_widths);
360 sysadm 1.2
361 sysadm 1.4 for (i = 0; i < split_line_total; i++)
362 sysadm 1.2 {
363 sysadm 1.4 if (display_line + i > last_display_line)
364 sysadm 1.2 {
365 sysadm 1.4 // Insert blank display line after last_display_line
366     if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
367     {
368 sysadm 1.29 #ifdef _DEBUG
369     log_error("display_line_total over limit %d >= %d\n", p_editor_data->display_line_total, MAX_EDITOR_DATA_LINES);
370     #endif
371    
372 sysadm 1.15 // Terminate prior display line with \n, to avoid error on cleanup
373     if (display_line + i - 1 >= 0 && p_editor_data->display_line_lengths[display_line + i - 1] > 0)
374     {
375 sysadm 1.24 len = split_line(p_editor_data->p_display_lines[display_line + i - 1], SCREEN_COLS - 1, &eol, &display_len, 0);
376 sysadm 1.15 p_editor_data->p_display_lines[display_line + i - 1][len] = '\n';
377     p_editor_data->p_display_lines[display_line + i - 1][len + 1] = '\0';
378     p_editor_data->display_line_lengths[display_line + i - 1] = len + 1;
379 sysadm 1.39 p_editor_data->display_line_widths[display_line + i - 1] = display_len;
380 sysadm 1.15 }
381     if (*p_offset >= p_editor_data->display_line_lengths[*p_display_line])
382     {
383     *p_offset = p_editor_data->display_line_lengths[*p_display_line] - 1;
384     }
385     break;
386 sysadm 1.4 }
387 sysadm 1.32
388     // for (j = p_editor_data->display_line_total; j > last_display_line + 1; j--)
389     // {
390     // p_editor_data->p_display_lines[j] = p_editor_data->p_display_lines[j - 1];
391     // p_editor_data->display_line_lengths[j] = p_editor_data->display_line_lengths[j - 1];
392 sysadm 1.39 // p_editor_data->display_line_widths[j] = p_editor_data->display_line_widths[j - 1];
393 sysadm 1.32 // }
394     memmove(p_editor_data->p_display_lines + last_display_line + 2,
395     p_editor_data->p_display_lines + last_display_line + 1,
396     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
397     sizeof(p_editor_data->p_display_lines[last_display_line + 1]));
398     memmove(p_editor_data->display_line_lengths + last_display_line + 2,
399     p_editor_data->display_line_lengths + last_display_line + 1,
400     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
401     sizeof(p_editor_data->display_line_lengths[last_display_line + 1]));
402 sysadm 1.39 memmove(p_editor_data->display_line_widths + last_display_line + 2,
403     p_editor_data->display_line_widths + last_display_line + 1,
404     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
405     sizeof(p_editor_data->display_line_widths[last_display_line + 1]));
406 sysadm 1.32
407 sysadm 1.4 last_display_line++;
408 sysadm 1.32 *p_last_updated_line = p_editor_data->display_line_total;
409 sysadm 1.4 (p_editor_data->display_line_total)++;
410 sysadm 1.2 }
411    
412 sysadm 1.4 p_editor_data->display_line_lengths[display_line + i] = line_offsets[i + 1] - line_offsets[i];
413 sysadm 1.39 p_editor_data->display_line_widths[display_line + i] = line_widths[i];
414 sysadm 1.4 p_editor_data->p_display_lines[display_line + i] =
415     (i == 0
416     ? p_data_line
417     : (p_editor_data->p_display_lines[display_line + i - 1] + p_editor_data->display_line_lengths[display_line + i - 1]));
418 sysadm 1.2
419 sysadm 1.4 if (p_editor_data->display_line_lengths[display_line + i] > 0 &&
420     p_editor_data->p_display_lines[display_line + i][p_editor_data->display_line_lengths[display_line + i] - 1] == '\n')
421 sysadm 1.3 {
422 sysadm 1.4 break;
423 sysadm 1.3 }
424 sysadm 1.4 }
425 sysadm 1.3
426 sysadm 1.7 *p_last_updated_line = MAX(display_line + MIN(i, split_line_total - 1), *p_last_updated_line);
427 sysadm 1.2
428 sysadm 1.14 if (*p_offset >= p_editor_data->display_line_lengths[*p_display_line])
429 sysadm 1.3 {
430 sysadm 1.18 if (*p_display_line + 1 < p_editor_data->display_line_total)
431 sysadm 1.15 {
432 sysadm 1.18 *p_offset -= p_editor_data->display_line_lengths[*p_display_line];
433 sysadm 1.15 (*p_display_line)++;
434     }
435 sysadm 1.22 }
436    
437     // Prevent the last display line from being over-length
438     if (p_editor_data->display_line_total == MAX_EDITOR_DATA_LINES)
439     {
440 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);
441 sysadm 1.22 p_editor_data->p_display_lines[p_editor_data->display_line_total - 1][len] = '\0';
442     p_editor_data->display_line_lengths[p_editor_data->display_line_total - 1] = len;
443 sysadm 1.39 p_editor_data->display_line_widths[p_editor_data->display_line_total - 1] = display_len;
444 sysadm 1.22 if (*p_display_line + 1 >= p_editor_data->display_line_total)
445 sysadm 1.20 {
446 sysadm 1.22 *p_offset = MIN(*p_offset, len);
447     *p_display_line = p_editor_data->display_line_total - 1;
448 sysadm 1.20 }
449 sysadm 1.3 }
450    
451 sysadm 1.4 return 0;
452 sysadm 1.2 }
453    
454 sysadm 1.23 int editor_data_delete(EDITOR_DATA *p_editor_data, long *p_display_line, long *p_offset,
455 sysadm 1.49 long *p_last_updated_line, int del_line)
456 sysadm 1.2 {
457 sysadm 1.23 long display_line = *p_display_line;
458     long offset = *p_offset;
459 sysadm 1.7 char *p_data_line = NULL;
460     long len_data_line;
461     long offset_data_line;
462     long last_display_line; // of data line
463     long line_offsets[MAX_EDITOR_DATA_LINE_LENGTH + 1];
464 sysadm 1.39 int line_widths[MAX_EDITOR_DATA_LINE_LENGTH + 1];
465 sysadm 1.7 long split_line_total;
466     long i, j;
467     int str_len = 0;
468 sysadm 1.39 char c;
469 sysadm 1.7
470     if (p_editor_data == NULL || p_last_updated_line == NULL)
471     {
472 sysadm 1.46 log_error("NULL pointer error\n");
473 sysadm 1.7 return -1;
474     }
475    
476     // Get length of current data line
477     len_data_line = 0;
478     p_data_line = p_editor_data->p_display_lines[display_line];
479     for (i = display_line - 1; i >= 0; i--)
480     {
481     if (p_editor_data->display_line_lengths[i] > 0 &&
482     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of prior data line
483     {
484     break;
485     }
486    
487     len_data_line += p_editor_data->display_line_lengths[i];
488     p_data_line = p_editor_data->p_display_lines[i];
489     }
490     offset_data_line = len_data_line + offset;
491     last_display_line = p_editor_data->display_line_total - 1;
492     for (i = display_line; i < p_editor_data->display_line_total; i++)
493     {
494     len_data_line += p_editor_data->display_line_lengths[i];
495    
496     if (p_editor_data->display_line_lengths[i] > 0 &&
497     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
498     {
499     last_display_line = i;
500     break;
501     }
502     }
503    
504 sysadm 1.18 if (offset_data_line >= len_data_line) // end-of-line
505     {
506     return 0;
507     }
508    
509 sysadm 1.7 // Check str to be deleted
510 sysadm 1.49 if (del_line)
511     {
512     str_len = (int)(p_editor_data->display_line_lengths[display_line] - offset);
513     }
514     else if (p_data_line[offset_data_line] > 0 && p_data_line[offset_data_line] < 127)
515 sysadm 1.7 {
516     str_len = 1;
517     }
518 sysadm 1.48 else if (p_data_line[offset_data_line] & 0x80) // head of multi-byte character
519 sysadm 1.7 {
520 sysadm 1.39 str_len = 1;
521 sysadm 1.48 c = (p_data_line[offset_data_line] & 0x70) << 1;
522     while (c & 0x80)
523 sysadm 1.39 {
524     str_len++;
525 sysadm 1.48 c = (c & 0x7f) << 1;
526 sysadm 1.39 }
527 sysadm 1.7 }
528     else
529     {
530 sysadm 1.18 log_error("Some strange character at display_line %ld, offset %ld: %d %d\n",
531     display_line, offset, p_data_line[offset_data_line], p_data_line[offset_data_line + 1]);
532 sysadm 1.10 str_len = 1;
533 sysadm 1.7 }
534    
535     // Current display line is (almost) empty
536     if (offset_data_line + str_len > len_data_line ||
537 sysadm 1.49 (offset_data_line + str_len == len_data_line &&
538     p_data_line[del_line ? len_data_line - 1 : offset_data_line] == '\n'))
539 sysadm 1.7 {
540 sysadm 1.9 if (display_line + 1 >= p_editor_data->display_line_total) // No additional display line (data line)
541     {
542     return 0;
543     }
544    
545     len_data_line = 0; // Next data line
546     last_display_line = p_editor_data->display_line_total - 1;
547     for (i = display_line + 1; i < p_editor_data->display_line_total; i++)
548     {
549     len_data_line += p_editor_data->display_line_lengths[i];
550    
551     if (p_editor_data->display_line_lengths[i] > 0 &&
552     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
553     {
554     last_display_line = i;
555     break;
556     }
557     }
558    
559     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
560     {
561     return 0;
562     }
563    
564     // Append next data line to current one
565     memcpy(p_data_line + offset_data_line, p_editor_data->p_display_lines[display_line + 1], (size_t)len_data_line);
566     p_data_line[offset_data_line + len_data_line] = '\0';
567    
568     // Recycle next data line
569 sysadm 1.16 memory_pool_free(p_mp_data_line, p_editor_data->p_display_lines[display_line + 1]);
570 sysadm 1.9 }
571     else
572     {
573     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));
574     p_data_line[len_data_line - str_len] = '\0';
575     len_data_line -= str_len;
576 sysadm 1.7 }
577    
578     // Set p_data_line to head of current display line
579     p_data_line = p_editor_data->p_display_lines[display_line];
580     split_line_total = last_display_line - display_line + 2;
581    
582     // Split current data line since beginning of current display line
583 sysadm 1.39 split_line_total = split_data_lines(p_data_line, SCREEN_COLS, line_offsets, split_line_total, 0, line_widths);
584 sysadm 1.7
585     for (i = 0; i < split_line_total; i++)
586     {
587     p_editor_data->display_line_lengths[display_line + i] = line_offsets[i + 1] - line_offsets[i];
588 sysadm 1.39 p_editor_data->display_line_widths[display_line + i] = line_widths[i];
589 sysadm 1.7 p_editor_data->p_display_lines[display_line + i] =
590     (i == 0
591     ? p_data_line
592     : (p_editor_data->p_display_lines[display_line + i - 1] + p_editor_data->display_line_lengths[display_line + i - 1]));
593    
594     if (p_editor_data->display_line_lengths[display_line + i] > 0 &&
595     p_editor_data->p_display_lines[display_line + i][p_editor_data->display_line_lengths[display_line + i] - 1] == '\n')
596     {
597     break;
598     }
599     }
600    
601     *p_last_updated_line = display_line + MIN(i, split_line_total - 1);
602    
603 sysadm 1.18 if (*p_last_updated_line < last_display_line)
604 sysadm 1.7 {
605     // Remove redundant display line after last_display_line
606 sysadm 1.32 // for (j = last_display_line + 1; j < p_editor_data->display_line_total; j++)
607     // {
608     // p_editor_data->p_display_lines[j - (last_display_line - *p_last_updated_line)] = p_editor_data->p_display_lines[j];
609     // p_editor_data->display_line_lengths[j - (last_display_line - *p_last_updated_line)] = p_editor_data->display_line_lengths[j];
610 sysadm 1.39 // p_editor_data->display_line_widths[j - (last_display_line - *p_last_updated_line)] = p_editor_data->display_line_widths[j];
611 sysadm 1.32 // }
612     memmove(p_editor_data->p_display_lines + *p_last_updated_line + 1,
613     p_editor_data->p_display_lines + last_display_line + 1,
614     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
615     sizeof(p_editor_data->p_display_lines[last_display_line + 1]));
616     memmove(p_editor_data->display_line_lengths + *p_last_updated_line + 1,
617     p_editor_data->display_line_lengths + last_display_line + 1,
618     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
619     sizeof(p_editor_data->display_line_lengths[last_display_line + 1]));
620 sysadm 1.39 memmove(p_editor_data->display_line_widths + *p_last_updated_line + 1,
621     p_editor_data->display_line_widths + last_display_line + 1,
622     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
623     sizeof(p_editor_data->display_line_widths[last_display_line + 1]));
624 sysadm 1.7
625 sysadm 1.18 j = p_editor_data->display_line_total;
626     (p_editor_data->display_line_total) -= (last_display_line - *p_last_updated_line);
627     *p_last_updated_line = MAX(j - 1, *p_last_updated_line);
628 sysadm 1.7 }
629    
630 sysadm 1.23 // Return real offset
631     *p_offset = offset;
632    
633 sysadm 1.9 return str_len;
634 sysadm 1.2 }
635    
636     static int editor_display_key_handler(int *p_key, EDITOR_CTX *p_ctx)
637 sysadm 1.1 {
638     switch (*p_key)
639     {
640     case 0: // Set msg
641     snprintf(p_ctx->msg, sizeof(p_ctx->msg),
642 sysadm 1.55 "| 退出[\033[32mCtrl-W\033[33m] | [\033[32m%s\033[33m]",
643     (UTF8_fixed_width ? "定宽" : "变宽"));
644 sysadm 1.1 break;
645 sysadm 1.24 case KEY_CSI:
646     *p_key = KEY_ESC;
647     break;
648 sysadm 1.1 }
649    
650     return 0;
651     }
652    
653     int editor_display(EDITOR_DATA *p_editor_data)
654     {
655     static int show_help = 1;
656     char buffer[MAX_EDITOR_DATA_LINE_LENGTH];
657 sysadm 1.2 EDITOR_CTX ctx;
658 sysadm 1.1 int ch = 0;
659 sysadm 1.55 char input_str[5];
660 sysadm 1.56 int str_len = 0;
661 sysadm 1.55 wchar_t wcs[2];
662 sysadm 1.56 int wc_len;
663 sysadm 1.39 char c;
664 sysadm 1.3 int input_ok;
665     const int screen_begin_row = 1;
666 sysadm 1.14 const int screen_row_total = SCREEN_ROWS - screen_begin_row;
667     int output_current_row = screen_begin_row;
668     int output_end_row = SCREEN_ROWS - 1;
669 sysadm 1.1 long int line_current = 0;
670     long int len;
671     int loop;
672     int eol, display_len;
673     long row_pos = 1, col_pos = 1;
674 sysadm 1.3 long display_line_in, offset_in;
675     long display_line_out, offset_out;
676     int scroll_rows;
677 sysadm 1.2 long last_updated_line = 0;
678 sysadm 1.8 int key_insert = 1;
679 sysadm 1.12 int i, j;
680     char *p_str;
681 sysadm 1.49 int del_line;
682 sysadm 1.1
683 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
684 sysadm 1.1
685     // update msg_ext with extended key handler
686     if (editor_display_key_handler(&ch, &ctx) != 0)
687     {
688     return ch;
689     }
690    
691 sysadm 1.35 for (loop = 1; !SYS_server_exit && loop;)
692 sysadm 1.1 {
693 sysadm 1.14 if (line_current >= p_editor_data->display_line_total || output_current_row > output_end_row)
694 sysadm 1.1 {
695 sysadm 1.14 ctx.line_cursor = line_current - output_current_row + row_pos + 1;
696 sysadm 1.1
697     snprintf(buffer, sizeof(buffer),
698 sysadm 1.2 "\033[1;44;33m[\033[32m%ld\033[33m;\033[32m%ld\033[33m] "
699 sysadm 1.39 "第\033[32m%ld\033[33m/\033[32m%ld\033[33m行 [\033[32m%s\033[33m] "
700 sysadm 1.2 "%s",
701     row_pos, col_pos,
702     ctx.line_cursor, p_editor_data->display_line_total,
703 sysadm 1.39 key_insert ? "插入" : "替换",
704 sysadm 1.1 ctx.msg);
705    
706 sysadm 1.24 len = split_line(buffer, SCREEN_COLS, &eol, &display_len, 1);
707 sysadm 1.1 for (; display_len < SCREEN_COLS; display_len++)
708     {
709     buffer[len++] = ' ';
710     }
711     buffer[len] = '\0';
712     strncat(buffer, "\033[m", sizeof(buffer) - 1 - strnlen(buffer, sizeof(buffer)));
713    
714     moveto(SCREEN_ROWS, 0);
715     prints("%s", buffer);
716    
717     moveto((int)row_pos, (int)col_pos);
718     iflush();
719    
720 sysadm 1.25 str_len = 0;
721 sysadm 1.53 ch = igetch_t(BBS_max_user_idle_time);
722 sysadm 1.33 while (!SYS_server_exit)
723 sysadm 1.1 {
724 sysadm 1.47 if (ch != KEY_NULL && ch != KEY_TIMEOUT)
725     {
726     BBS_last_access_tm = time(NULL);
727     }
728    
729 sysadm 1.1 // extended key handler
730     if (editor_display_key_handler(&ch, &ctx) != 0)
731     {
732     goto cleanup;
733     }
734    
735 sysadm 1.48 if (ch < 256 && (ch & 0x80)) // head of multi-byte character
736 sysadm 1.3 {
737     str_len = 0;
738 sysadm 1.48 c = (char)(ch & 0xf0);
739     while (c & 0x80)
740 sysadm 1.39 {
741     input_str[str_len] = (char)(ch - 256);
742     str_len++;
743 sysadm 1.48 c = (c & 0x7f) << 1;
744 sysadm 1.39
745 sysadm 1.48 if ((c & 0x80) == 0) // Input completed
746 sysadm 1.39 {
747     break;
748     }
749    
750     // Expect additional bytes of input
751     ch = igetch(100); // 0.1 second
752     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Ignore received bytes if no futher input
753     {
754 sysadm 1.40 #ifdef _DEBUG
755 sysadm 1.39 log_error("Ignore %d bytes of incomplete UTF8 character\n", str_len);
756 sysadm 1.40 #endif
757 sysadm 1.39 str_len = 0;
758     break;
759     }
760     }
761 sysadm 1.55 input_str[str_len] = '\0';
762 sysadm 1.3 }
763    
764 sysadm 1.39 if ((ch >= 32 && ch < 127) || str_len >= 2 || // Printable character or multi-byte character
765     ch == CR || ch == KEY_ESC) // Special character
766 sysadm 1.2 {
767 sysadm 1.43 // Refresh current action while user input
768     if (user_online_update(NULL) < 0)
769     {
770     log_error("user_online_update(NULL) error\n");
771     }
772    
773 sysadm 1.21 if (str_len == 0) // ch >= 32 && ch < 127
774 sysadm 1.3 {
775 sysadm 1.4 input_str[0] = (char)ch;
776 sysadm 1.3 str_len = 1;
777     }
778    
779 sysadm 1.14 display_line_in = line_current - output_current_row + row_pos;
780 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[display_line_in], (int)col_pos - 1, &eol, &display_len, 0);
781 sysadm 1.3 display_line_out = display_line_in;
782     offset_out = offset_in;
783 sysadm 1.2
784 sysadm 1.32 last_updated_line = display_line_in;
785    
786 sysadm 1.8 if (!key_insert) // overwrite
787     {
788 sysadm 1.23 if (editor_data_delete(p_editor_data, &display_line_out, &offset_out,
789 sysadm 1.49 &last_updated_line, 0) < 0)
790 sysadm 1.8 {
791     log_error("editor_data_delete() error\n");
792     }
793     }
794    
795 sysadm 1.3 if (editor_data_insert(p_editor_data, &display_line_out, &offset_out,
796 sysadm 1.4 input_str, str_len, &last_updated_line) < 0)
797 sysadm 1.2 {
798 sysadm 1.14 log_error("editor_data_insert(str_len=%d) error\n", str_len);
799 sysadm 1.2 }
800     else
801     {
802 sysadm 1.14 output_end_row = MIN(SCREEN_ROWS - 1, output_current_row + (int)(last_updated_line - line_current));
803     line_current -= (output_current_row - row_pos);
804     output_current_row = (int)row_pos;
805 sysadm 1.2
806 sysadm 1.14 scroll_rows = MAX(0, (int)(display_line_out - display_line_in) - (output_end_row - output_current_row));
807 sysadm 1.2
808 sysadm 1.3 if (scroll_rows > 0)
809 sysadm 1.2 {
810 sysadm 1.3 moveto(SCREEN_ROWS, 0);
811     clrtoeol();
812     for (i = 0; i < scroll_rows; i++)
813     {
814 sysadm 1.36 // prints("\033[S"); // Scroll up 1 line
815     prints("\n"); // Legacy Cterm only works with this line
816 sysadm 1.3 }
817 sysadm 1.2
818 sysadm 1.14 output_current_row -= scroll_rows;
819     if (output_current_row < screen_begin_row)
820 sysadm 1.2 {
821 sysadm 1.14 line_current += (screen_begin_row - output_current_row);
822     output_current_row = screen_begin_row;
823 sysadm 1.2 }
824 sysadm 1.14 row_pos = output_end_row;
825 sysadm 1.3 }
826     else // if (scroll_lines == 0)
827     {
828     row_pos += (display_line_out - display_line_in);
829 sysadm 1.2 }
830 sysadm 1.39
831     if (offset_out != offset_in)
832     {
833     if (display_line_out != display_line_in)
834     {
835     col_pos = 1;
836     }
837 sysadm 1.42 if (offset_out > 0)
838 sysadm 1.39 {
839 sysadm 1.55 if (mbstowcs(wcs, input_str, 1) == (size_t)-1)
840     {
841     log_error("mbstowcs() error\n");
842     }
843     col_pos += (str_len == 1 ? 1 : (UTF8_fixed_width ? 2 : wcwidth(wcs[0])));
844 sysadm 1.39 }
845     }
846 sysadm 1.11 }
847 sysadm 1.3
848 sysadm 1.25 if (display_line_out != display_line_in) // Output on line change
849     {
850     break;
851     }
852    
853     ch = igetch(0);
854     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Output if no futher input
855     {
856     break;
857     }
858    
859 sysadm 1.21 str_len = 0;
860 sysadm 1.11 continue;
861 sysadm 1.2 }
862 sysadm 1.49 else if (ch == KEY_DEL || ch == BACKSPACE || ch == Ctrl('K') || ch == Ctrl('Y')) // Del
863 sysadm 1.2 {
864 sysadm 1.43 // Refresh current action while user input
865     if (user_online_update(NULL) < 0)
866     {
867     log_error("user_online_update(NULL) error\n");
868     }
869    
870 sysadm 1.49 del_line = 0;
871    
872 sysadm 1.9 if (ch == BACKSPACE)
873     {
874 sysadm 1.18 if (line_current - output_current_row + row_pos <= 0 && col_pos <= 1) // Forbidden
875     {
876 sysadm 1.34 break; // force output prior operation result if any
877 sysadm 1.18 }
878    
879 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
880     (int)col_pos - 1, &eol, &display_len, 0);
881 sysadm 1.55 col_pos = display_len;
882 sysadm 1.14 if (col_pos < 1 && line_current - output_current_row + row_pos >= 0)
883 sysadm 1.9 {
884     row_pos--;
885 sysadm 1.39 col_pos = MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]);
886 sysadm 1.9 }
887     }
888 sysadm 1.49 else if (ch == Ctrl('K'))
889     {
890     del_line = 1;
891     }
892     else if (ch == Ctrl('Y'))
893     {
894     col_pos = 1;
895     del_line = 1;
896     }
897 sysadm 1.2
898 sysadm 1.23 display_line_in = line_current - output_current_row + row_pos;
899 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[display_line_in], (int)col_pos - 1, &eol, &display_len, 0);
900 sysadm 1.23 display_line_out = display_line_in;
901     offset_out = offset_in;
902    
903     if ((str_len = editor_data_delete(p_editor_data, &display_line_out, &offset_out,
904 sysadm 1.49 &last_updated_line, del_line)) < 0)
905 sysadm 1.2 {
906 sysadm 1.49 log_error("editor_data_delete() error: %d\n", str_len);
907 sysadm 1.2 }
908     else
909     {
910 sysadm 1.39 col_pos = display_len + 1; // Set col_pos to accurate pos
911 sysadm 1.9
912 sysadm 1.14 output_end_row = MIN(SCREEN_ROWS - 1, output_current_row + (int)(last_updated_line - line_current));
913     line_current -= (output_current_row - row_pos);
914     output_current_row = (int)row_pos;
915 sysadm 1.9
916 sysadm 1.14 if (output_current_row < screen_begin_row) // row_pos <= 0
917 sysadm 1.9 {
918 sysadm 1.14 output_current_row = screen_begin_row;
919 sysadm 1.9 row_pos = screen_begin_row;
920 sysadm 1.14 output_end_row = SCREEN_ROWS - 1;
921     }
922    
923     // Exceed end
924     if (line_current + (screen_row_total - output_current_row) >= p_editor_data->display_line_total &&
925     p_editor_data->display_line_total > screen_row_total)
926     {
927     scroll_rows = (int)((line_current - (output_current_row - screen_begin_row)) -
928     (p_editor_data->display_line_total - screen_row_total));
929    
930     line_current = p_editor_data->display_line_total - screen_row_total;
931     row_pos += scroll_rows;
932     output_current_row = screen_begin_row;
933     output_end_row = SCREEN_ROWS - 1;
934 sysadm 1.9 }
935 sysadm 1.18
936     clrline(output_current_row, output_end_row);
937 sysadm 1.2 }
938    
939 sysadm 1.25 if (display_line_out != display_line_in) // Output on line change
940     {
941     break;
942     }
943    
944     ch = igetch(0);
945     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Output if no futher input
946     {
947     break;
948     }
949    
950 sysadm 1.21 str_len = 0;
951 sysadm 1.2 continue;
952     }
953    
954 sysadm 1.25 input_ok = 1;
955 sysadm 1.1 switch (ch)
956     {
957     case KEY_NULL:
958 sysadm 1.47 log_error("KEY_NULL\n");
959     goto cleanup;
960 sysadm 1.1 case KEY_TIMEOUT:
961 sysadm 1.47 log_error("User input timeout\n");
962 sysadm 1.1 goto cleanup;
963 sysadm 1.17 case Ctrl('W'):
964 sysadm 1.41 case Ctrl('X'):
965 sysadm 1.1 loop = 0;
966     break;
967 sysadm 1.13 case Ctrl('S'): // Start of line
968 sysadm 1.2 case KEY_CTRL_LEFT:
969 sysadm 1.1 col_pos = 1;
970     break;
971 sysadm 1.13 case Ctrl('E'): // End of line
972 sysadm 1.2 case KEY_CTRL_RIGHT:
973 sysadm 1.23 if (line_current - output_current_row + row_pos == p_editor_data->display_line_total - 1) // row_pos at end line
974 sysadm 1.22 {
975     // last display line does NOT have \n in the end
976 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
977 sysadm 1.22 break;
978     }
979 sysadm 1.39 col_pos = MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]);
980 sysadm 1.1 break;
981 sysadm 1.13 case Ctrl('T'): // Top of screen
982 sysadm 1.2 case KEY_CTRL_UP:
983 sysadm 1.3 row_pos = screen_begin_row;
984 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
985 sysadm 1.2 break;
986 sysadm 1.13 case Ctrl('B'): // Bottom of screen
987 sysadm 1.2 case KEY_CTRL_DOWN:
988 sysadm 1.18 if (p_editor_data->display_line_total < screen_row_total)
989     {
990     row_pos = p_editor_data->display_line_total;
991     }
992     else
993     {
994     row_pos = SCREEN_ROWS - 1;
995     }
996     if (line_current + (screen_row_total - (output_current_row - screen_begin_row)) >= p_editor_data->display_line_total) // Reach end
997     {
998     // last display line does NOT have \n in the end
999 sysadm 1.39 col_pos = MIN(col_pos, p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1);
1000 sysadm 1.18 }
1001     else
1002     {
1003 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1004 sysadm 1.18 }
1005 sysadm 1.2 break;
1006     case KEY_INS:
1007 sysadm 1.8 key_insert = !key_insert;
1008 sysadm 1.2 break;
1009 sysadm 1.1 case KEY_HOME:
1010     row_pos = 1;
1011     col_pos = 1;
1012 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1013 sysadm 1.1 {
1014     break;
1015     }
1016     line_current = 0;
1017 sysadm 1.14 output_current_row = screen_begin_row;
1018     output_end_row = SCREEN_ROWS - 1;
1019     clrline(output_current_row, SCREEN_ROWS);
1020 sysadm 1.1 break;
1021     case KEY_END:
1022 sysadm 1.3 if (p_editor_data->display_line_total < screen_row_total)
1023 sysadm 1.1 {
1024     row_pos = p_editor_data->display_line_total;
1025 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1026 sysadm 1.1 break;
1027     }
1028 sysadm 1.3 line_current = p_editor_data->display_line_total - screen_row_total;
1029 sysadm 1.14 output_current_row = screen_begin_row;
1030     output_end_row = SCREEN_ROWS - 1;
1031     row_pos = SCREEN_ROWS - 1;
1032 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1033 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1034 sysadm 1.1 break;
1035     case KEY_LEFT:
1036 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
1037     (int)col_pos - 1, &eol, &display_len, 0);
1038 sysadm 1.55 col_pos = display_len;
1039 sysadm 1.56 if (offset_in > 0)
1040 sysadm 1.39 {
1041 sysadm 1.56 str_len = 1;
1042     offset_in--;
1043     if (p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] < 0 ||
1044     p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] > 127) // UTF8
1045 sysadm 1.55 {
1046 sysadm 1.56 while (offset_in > 0 &&
1047     (p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] & 0xc0) != 0xc0)
1048     {
1049     str_len++;
1050     offset_in--;
1051     }
1052    
1053     if (str_len > 4)
1054     {
1055     log_error("Invalid UTF-8 data detected: str_len > 4\n");
1056     }
1057    
1058     if (mbstowcs(wcs, p_editor_data->p_display_lines[line_current - output_current_row + row_pos] + offset_in, 1) ==
1059     (size_t)-1)
1060     {
1061     log_error("mbstowcs() error\n");
1062     }
1063     wc_len = (UTF8_fixed_width ? 2 : wcwidth(wcs[0]));
1064    
1065     if (wc_len == 2)
1066     {
1067     col_pos--;
1068     }
1069 sysadm 1.55 }
1070 sysadm 1.39 }
1071     if (col_pos >= 1)
1072 sysadm 1.1 {
1073     break;
1074     }
1075     col_pos = SCREEN_COLS; // continue to KEY_UP
1076     case KEY_UP:
1077 sysadm 1.3 if (row_pos > screen_begin_row)
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 1.14 if (line_current - output_current_row < 0) // Reach begin
1084 sysadm 1.1 {
1085 sysadm 1.2 col_pos = 1;
1086 sysadm 1.1 break;
1087     }
1088 sysadm 1.14 line_current -= output_current_row;
1089     output_current_row = screen_begin_row;
1090 sysadm 1.1 // screen_end_line = begin_line;
1091     // prints("\033[T"); // Scroll down 1 line
1092 sysadm 1.14 output_end_row = SCREEN_ROWS - 1; // Legacy Fterm only works with this line
1093 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1094 sysadm 1.1 break;
1095     case KEY_RIGHT:
1096 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
1097     (int)col_pos - 1, &eol, &display_len, 0);
1098 sysadm 1.55 col_pos = display_len + 2;
1099 sysadm 1.56 if (offset_in < p_editor_data->display_line_lengths[line_current - output_current_row + row_pos])
1100 sysadm 1.39 {
1101 sysadm 1.56 str_len = 0;
1102     if ((p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] & 0x80) ==
1103     0x80) // head of multi-byte character
1104     {
1105     c = (char)(p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] & 0xf0);
1106     while (c & 0x80)
1107     {
1108     str_len++;
1109     c = (c & 0x7f) << 1;
1110     }
1111    
1112     if (str_len > 4)
1113     {
1114     log_error("Invalid UTF-8 data detected: str_len > 4\n");
1115     }
1116    
1117     if (mbstowcs(wcs, p_editor_data->p_display_lines[line_current - output_current_row + row_pos] + offset_in, 1) ==
1118     (size_t)-1)
1119     {
1120     log_error("mbstowcs() error\n");
1121     }
1122     wc_len = (UTF8_fixed_width ? 2 : wcwidth(wcs[0]));
1123    
1124     if (wc_len == 2)
1125     {
1126     col_pos++;
1127     }
1128     }
1129     else
1130 sysadm 1.55 {
1131 sysadm 1.56 str_len = 1;
1132 sysadm 1.55 }
1133 sysadm 1.56 offset_in += str_len;
1134 sysadm 1.39 }
1135     if (col_pos <= p_editor_data->display_line_widths[line_current - output_current_row + row_pos])
1136 sysadm 1.1 {
1137     break;
1138     }
1139     col_pos = 1; // continue to KEY_DOWN
1140     case KEY_DOWN:
1141 sysadm 1.3 if (row_pos < MIN(screen_row_total, p_editor_data->display_line_total))
1142 sysadm 1.1 {
1143     row_pos++;
1144 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1145 sysadm 1.1 break;
1146     }
1147 sysadm 1.23 if (line_current - output_current_row + row_pos == p_editor_data->display_line_total - 1) // row_pos at end line
1148 sysadm 1.1 {
1149 sysadm 1.18 // last display line does NOT have \n in the end
1150 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1151 sysadm 1.1 break;
1152     }
1153 sysadm 1.14 line_current += (screen_row_total - (output_current_row - screen_begin_row));
1154     output_current_row = screen_row_total;
1155     output_end_row = SCREEN_ROWS - 1;
1156 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1157 sysadm 1.1 moveto(SCREEN_ROWS, 0);
1158     clrtoeol();
1159 sysadm 1.36 // prints("\033[S"); // Scroll up 1 line
1160     prints("\n"); // Legacy Cterm only works with this line
1161 sysadm 1.1 break;
1162     case KEY_PGUP:
1163 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1164 sysadm 1.1 {
1165     break;
1166     }
1167 sysadm 1.14 line_current -= ((screen_row_total - 1) + (output_current_row - screen_begin_row));
1168 sysadm 1.1 if (line_current < 0)
1169     {
1170     line_current = 0;
1171     }
1172 sysadm 1.14 output_current_row = screen_begin_row;
1173     output_end_row = SCREEN_ROWS - 1;
1174 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1175 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1176 sysadm 1.1 break;
1177     case KEY_PGDN:
1178 sysadm 1.14 if (line_current + screen_row_total - (output_current_row - screen_begin_row) >= p_editor_data->display_line_total) // Reach end
1179 sysadm 1.1 {
1180     break;
1181     }
1182 sysadm 1.14 line_current += (screen_row_total - 1) - (output_current_row - screen_begin_row);
1183 sysadm 1.3 if (line_current + screen_row_total > p_editor_data->display_line_total) // No enough lines to display
1184 sysadm 1.1 {
1185 sysadm 1.3 line_current = p_editor_data->display_line_total - screen_row_total;
1186 sysadm 1.1 }
1187 sysadm 1.14 output_current_row = screen_begin_row;
1188     output_end_row = SCREEN_ROWS - 1;
1189 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1190 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1191 sysadm 1.1 break;
1192 sysadm 1.44 case Ctrl('Q'):
1193 sysadm 1.1 case KEY_F1:
1194 sysadm 1.50 if (!show_help) // Not re-entrant
1195 sysadm 1.1 {
1196     break;
1197     }
1198     // Display help information
1199     show_help = 0;
1200 sysadm 1.50 display_file(DATA_EDITOR_HELP, 1);
1201 sysadm 1.1 show_help = 1;
1202     case KEY_F5:
1203     // Refresh after display help information
1204 sysadm 1.14 line_current -= (output_current_row - screen_begin_row);
1205     output_current_row = screen_begin_row;
1206     output_end_row = SCREEN_ROWS - 1;
1207     clrline(output_current_row, SCREEN_ROWS);
1208 sysadm 1.1 break;
1209     case 0: // Refresh bottom line
1210     break;
1211     default:
1212     input_ok = 0;
1213     break;
1214     }
1215    
1216 sysadm 1.43 // Refresh current action while user input
1217     if (user_online_update(NULL) < 0)
1218     {
1219     log_error("user_online_update(NULL) error\n");
1220     }
1221    
1222 sysadm 1.14 if (input_ok)
1223 sysadm 1.11 {
1224 sysadm 1.14 break;
1225 sysadm 1.11 }
1226 sysadm 1.25
1227 sysadm 1.53 ch = igetch_t(BBS_max_user_idle_time);
1228 sysadm 1.1 }
1229    
1230     continue;
1231     }
1232    
1233     len = p_editor_data->display_line_lengths[line_current];
1234     if (len >= sizeof(buffer))
1235     {
1236     log_error("Buffer overflow: len=%ld line=%ld \n", len, line_current);
1237     len = sizeof(buffer) - 1;
1238     }
1239     else if (len < 0)
1240     {
1241     log_error("Incorrect line offsets: len=%ld line=%ld \n", len, line_current);
1242     len = 0;
1243     }
1244    
1245 sysadm 1.12 // memcpy(buffer, p_editor_data->p_display_lines[line_current], (size_t)len);
1246     // Replace '\033' with '*'
1247     p_str = p_editor_data->p_display_lines[line_current];
1248     for (i = 0, j = 0; i < len; i++)
1249     {
1250     if (p_str[i] == '\033')
1251     {
1252     memcpy(buffer + j, EDITOR_ESC_DISPLAY_STR, sizeof(EDITOR_ESC_DISPLAY_STR) - 1);
1253     j += (int)(sizeof(EDITOR_ESC_DISPLAY_STR) - 1);
1254     }
1255     else
1256     {
1257     buffer[j] = p_str[i];
1258     j++;
1259     }
1260     }
1261     buffer[j] = '\0';
1262 sysadm 1.1
1263 sysadm 1.14 moveto(output_current_row, 0);
1264 sysadm 1.1 clrtoeol();
1265     prints("%s", buffer);
1266     line_current++;
1267 sysadm 1.14 output_current_row++;
1268 sysadm 1.1 }
1269    
1270     cleanup:
1271     return ch;
1272     }
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