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

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Revision 1.58 - (hide annotations)
Mon Nov 10 07:23:16 2025 UTC (4 months ago) by sysadm
Branch: MAIN
Changes since 1.57: +19 -3 lines
Content type: text/x-csrc 
Support TAB in text 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 sysadm 1.58 TAB_SIZE = 4,
27 sysadm 1.54 };
28    
29     static const char EDITOR_ESC_DISPLAY_STR[] = "\033[32m*\033[m";
30 sysadm 1.16
31     static MEMORY_POOL *p_mp_data_line;
32     static MEMORY_POOL *p_mp_editor_data;
33    
34     int editor_memory_pool_init(void)
35     {
36     if (p_mp_data_line != NULL || p_mp_editor_data != NULL)
37     {
38     log_error("Editor mem pool already initialized\n");
39     return -1;
40     }
41    
42     p_mp_data_line = memory_pool_init(MAX_EDITOR_DATA_LINE_LENGTH, EDITOR_MEM_POOL_LINE_PER_CHUNK, EDITOR_MEM_POOL_CHUNK_LIMIT);
43     if (p_mp_data_line == NULL)
44     {
45     log_error("Memory pool init error\n");
46     return -2;
47     }
48    
49     p_mp_editor_data = memory_pool_init(sizeof(EDITOR_DATA), 1, 1);
50 sysadm 1.45 if (p_mp_editor_data == NULL)
51 sysadm 1.16 {
52     log_error("Memory pool init error\n");
53     return -3;
54     }
55    
56     return 0;
57     }
58    
59     void editor_memory_pool_cleanup(void)
60     {
61     if (p_mp_data_line != NULL)
62     {
63     memory_pool_cleanup(p_mp_data_line);
64     p_mp_data_line = NULL;
65     }
66    
67     if (p_mp_editor_data != NULL)
68     {
69     memory_pool_cleanup(p_mp_editor_data);
70     p_mp_editor_data = NULL;
71     }
72     }
73 sysadm 1.12
74 sysadm 1.1 EDITOR_DATA *editor_data_load(const char *p_data)
75     {
76     EDITOR_DATA *p_editor_data;
77 sysadm 1.4 char *p_data_line = NULL;
78 sysadm 1.22 long line_offsets[MAX_EDITOR_DATA_LINES + 1];
79 sysadm 1.1 long current_data_line_length = 0;
80 sysadm 1.14 long i;
81 sysadm 1.57 int j;
82 sysadm 1.1
83     if (p_data == NULL)
84     {
85 sysadm 1.46 log_error("NULL pointer error\n");
86 sysadm 1.1 return NULL;
87     }
88    
89 sysadm 1.16 p_editor_data = memory_pool_alloc(p_mp_editor_data);
90 sysadm 1.1 if (p_editor_data == NULL)
91     {
92 sysadm 1.16 log_error("memory_pool_alloc() error\n");
93 sysadm 1.1 return NULL;
94     }
95    
96 sysadm 1.39 p_editor_data->display_line_total = split_data_lines(p_data, SCREEN_COLS, line_offsets, MAX_EDITOR_DATA_LINES + 1,
97     0, p_editor_data->display_line_widths);
98 sysadm 1.1
99     for (i = 0; i < p_editor_data->display_line_total; i++)
100     {
101     p_editor_data->display_line_lengths[i] = line_offsets[i + 1] - line_offsets[i];
102    
103     if (i == 0 ||
104 sysadm 1.2 current_data_line_length + p_editor_data->display_line_lengths[i] + 1 > MAX_EDITOR_DATA_LINE_LENGTH ||
105 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'))
106     {
107     // Allocate new data line
108 sysadm 1.16 p_data_line = memory_pool_alloc(p_mp_data_line);
109 sysadm 1.4 if (p_data_line == NULL)
110 sysadm 1.1 {
111 sysadm 1.16 log_error("memory_pool_alloc() error: i = %d\n", i);
112 sysadm 1.1 // Cleanup
113 sysadm 1.14 editor_data_cleanup(p_editor_data);
114 sysadm 1.1 return NULL;
115     }
116    
117 sysadm 1.4 p_editor_data->p_display_lines[i] = p_data_line;
118 sysadm 1.2 current_data_line_length = 0;
119 sysadm 1.1 }
120     else
121     {
122     p_editor_data->p_display_lines[i] = p_editor_data->p_display_lines[i - 1] + p_editor_data->display_line_lengths[i - 1];
123     }
124    
125     memcpy(p_editor_data->p_display_lines[i], p_data + line_offsets[i], (size_t)p_editor_data->display_line_lengths[i]);
126     current_data_line_length += p_editor_data->display_line_lengths[i];
127 sysadm 1.19
128 sysadm 1.57 // Convert \t to single space
129     for (j = 0; j < p_editor_data->display_line_lengths[i]; j++)
130     {
131     if (p_editor_data->p_display_lines[i][j] == '\t')
132     {
133     p_editor_data->p_display_lines[i][j] = ' ';
134     }
135     }
136    
137 sysadm 1.19 // Trim \n from last line
138 sysadm 1.20 if (i + 1 == p_editor_data->display_line_total &&
139     p_editor_data->display_line_lengths[i] > 0 &&
140 sysadm 1.19 p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n')
141     {
142     p_editor_data->display_line_lengths[i]--;
143 sysadm 1.39 p_editor_data->display_line_widths[i]--;
144 sysadm 1.19 current_data_line_length--;
145     }
146 sysadm 1.4 p_data_line[current_data_line_length] = '\0';
147 sysadm 1.1 }
148    
149 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);
150 sysadm 1.4
151 sysadm 1.1 return p_editor_data;
152     }
153    
154     long editor_data_save(const EDITOR_DATA *p_editor_data, char *p_data, size_t buf_len)
155     {
156     long current_pos = 0;
157     long i;
158    
159     if (p_editor_data == NULL || p_data == NULL)
160     {
161 sysadm 1.46 log_error("NULL pointer error\n");
162 sysadm 1.1 return -1;
163     }
164    
165     for (i = 0; i < p_editor_data->display_line_total; i++)
166     {
167     if (current_pos + p_editor_data->display_line_lengths[i] + 1 > buf_len)
168     {
169     log_error("Data buffer not longer enough %d > %d\n", current_pos + p_editor_data->display_line_lengths[i] + 1, buf_len);
170     p_data[current_pos] = '\0';
171     return -2;
172     }
173    
174     memcpy(p_data + current_pos, p_editor_data->p_display_lines[i], (size_t)p_editor_data->display_line_lengths[i]);
175     current_pos += p_editor_data->display_line_lengths[i];
176     }
177    
178     p_data[current_pos] = '\0';
179    
180     return current_pos;
181     }
182    
183     void editor_data_cleanup(EDITOR_DATA *p_editor_data)
184     {
185 sysadm 1.14 char *p_data_line = NULL;
186 sysadm 1.1 long i;
187    
188     if (p_editor_data == NULL)
189     {
190     return;
191     }
192    
193 sysadm 1.14 for (i = 0; i < p_editor_data->display_line_total; i++)
194     {
195     if (p_data_line == NULL)
196     {
197     p_data_line = p_editor_data->p_display_lines[i];
198     }
199    
200     if (p_editor_data->display_line_lengths[i] > 0 &&
201     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n')
202     {
203 sysadm 1.16 memory_pool_free(p_mp_data_line, p_data_line);
204 sysadm 1.14 p_data_line = NULL;
205     }
206     }
207    
208     if (p_data_line != NULL)
209 sysadm 1.1 {
210 sysadm 1.16 memory_pool_free(p_mp_data_line, p_data_line);
211 sysadm 1.1 }
212    
213 sysadm 1.16 memory_pool_free(p_mp_editor_data, p_editor_data);
214 sysadm 1.1 }
215    
216 sysadm 1.3 int editor_data_insert(EDITOR_DATA *p_editor_data, long *p_display_line, long *p_offset,
217 sysadm 1.2 const char *str, int str_len, long *p_last_updated_line)
218     {
219 sysadm 1.3 long display_line = *p_display_line;
220     long offset = *p_offset;
221 sysadm 1.4 char *p_data_line = NULL;
222 sysadm 1.2 long len_data_line;
223     long offset_data_line;
224     long last_display_line; // of data line
225 sysadm 1.4 long line_offsets[MAX_EDITOR_DATA_LINE_LENGTH + 1];
226 sysadm 1.39 int line_widths[MAX_EDITOR_DATA_LINE_LENGTH + 1];
227 sysadm 1.4 long split_line_total;
228 sysadm 1.32 long i;
229 sysadm 1.15 int len;
230     int eol;
231     int display_len;
232 sysadm 1.2
233     if (p_editor_data == NULL || p_last_updated_line == NULL)
234     {
235 sysadm 1.46 log_error("NULL pointer error\n");
236 sysadm 1.2 return -1;
237     }
238    
239     // Get length of current data line
240     len_data_line = 0;
241     p_data_line = p_editor_data->p_display_lines[display_line];
242     for (i = display_line - 1; i >= 0; i--)
243     {
244     if (p_editor_data->display_line_lengths[i] > 0 &&
245     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of prior data line
246     {
247     break;
248     }
249    
250     len_data_line += p_editor_data->display_line_lengths[i];
251     p_data_line = p_editor_data->p_display_lines[i];
252     }
253     offset_data_line = len_data_line + offset;
254     last_display_line = p_editor_data->display_line_total - 1;
255     for (i = display_line; i < p_editor_data->display_line_total; i++)
256     {
257     len_data_line += p_editor_data->display_line_lengths[i];
258    
259     if (p_editor_data->display_line_lengths[i] > 0 &&
260     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
261     {
262     last_display_line = i;
263     break;
264     }
265     }
266    
267     // Split current data line if over-length
268 sysadm 1.37 if (len_data_line + str_len + 2 > MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
269 sysadm 1.2 {
270 sysadm 1.14 if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
271 sysadm 1.2 {
272 sysadm 1.29 #ifdef _DEBUG
273     log_error("Split line error, display_line_total(%ld) reach limit(%d)\n",
274     p_editor_data->display_line_total, MAX_EDITOR_DATA_LINES);
275     #endif
276    
277 sysadm 1.2 return -2;
278     }
279    
280     // Allocate new data line
281 sysadm 1.16 p_data_line = memory_pool_alloc(p_mp_data_line);
282 sysadm 1.4 if (p_data_line == NULL)
283 sysadm 1.2 {
284 sysadm 1.16 log_error("memory_pool_alloc() error\n");
285 sysadm 1.2 return -2;
286     }
287 sysadm 1.3
288 sysadm 1.37 if (offset_data_line + str_len + 2 >= MAX_EDITOR_DATA_LINE_LENGTH || str[0] == CR)
289 sysadm 1.2 {
290 sysadm 1.6 if (str[0] == CR)
291     {
292     str_len = 0;
293     }
294 sysadm 1.3
295 sysadm 1.4 // Copy str to new data line
296     memcpy(p_data_line, str, (size_t)str_len);
297    
298     // Copy rest part of current data line to new data line
299     memcpy(p_data_line + str_len,
300 sysadm 1.2 p_editor_data->p_display_lines[display_line] + offset,
301 sysadm 1.4 (size_t)(len_data_line - offset_data_line));
302    
303     p_data_line[str_len + len_data_line - offset_data_line] = '\0';
304 sysadm 1.2
305     // Add line ending to current display line (data line)
306     p_editor_data->p_display_lines[display_line][offset] = '\n';
307     p_editor_data->p_display_lines[display_line][offset + 1] = '\0';
308     p_editor_data->display_line_lengths[display_line] = offset + 1;
309 sysadm 1.4
310     *p_display_line = display_line + 1;
311     *p_offset = str_len;
312 sysadm 1.2 }
313 sysadm 1.6 else
314     {
315     // Copy rest part of current data line to new data line
316     memcpy(p_data_line,
317     p_editor_data->p_display_lines[display_line] + offset,
318     (size_t)(len_data_line - offset_data_line));
319    
320     p_data_line[len_data_line - offset_data_line] = '\0';
321    
322     // Append str to current display line
323     memcpy(p_editor_data->p_display_lines[display_line] + offset, str, (size_t)str_len);
324    
325     // Add line ending to current display line (data line)
326     p_editor_data->p_display_lines[display_line][offset + str_len] = '\n';
327     p_editor_data->p_display_lines[display_line][offset + str_len + 1] = '\0';
328     p_editor_data->display_line_lengths[display_line] = offset + str_len + 1;
329    
330     *p_display_line = display_line;
331     *p_offset = offset + str_len;
332     }
333 sysadm 1.2
334 sysadm 1.39 // Update display width of current display line
335     len = split_line(p_editor_data->p_display_lines[display_line], SCREEN_COLS, &eol, &display_len, 0);
336     p_editor_data->display_line_widths[display_line] = display_len;
337    
338 sysadm 1.4 split_line_total = last_display_line - display_line + 3;
339    
340     // Set start display_line for spliting new data line
341 sysadm 1.2 display_line++;
342 sysadm 1.4
343     *p_last_updated_line = p_editor_data->display_line_total;
344 sysadm 1.2 }
345 sysadm 1.4 else // insert str into current data line at offset_data_line
346 sysadm 1.2 {
347 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));
348     memcpy(p_data_line + offset_data_line, str, (size_t)str_len);
349     p_data_line[len_data_line + str_len] = '\0';
350 sysadm 1.3
351 sysadm 1.4 // Set p_data_line to head of current display line
352     p_data_line = p_editor_data->p_display_lines[display_line];
353     split_line_total = last_display_line - display_line + 3;
354 sysadm 1.3
355 sysadm 1.4 *p_display_line = display_line;
356     *p_offset = offset + str_len;
357 sysadm 1.2 }
358    
359 sysadm 1.4 // Split current data line since beginning of current display line
360 sysadm 1.39 split_line_total = split_data_lines(p_data_line, SCREEN_COLS, line_offsets, split_line_total, 0, line_widths);
361 sysadm 1.2
362 sysadm 1.4 for (i = 0; i < split_line_total; i++)
363 sysadm 1.2 {
364 sysadm 1.4 if (display_line + i > last_display_line)
365 sysadm 1.2 {
366 sysadm 1.4 // Insert blank display line after last_display_line
367     if (p_editor_data->display_line_total >= MAX_EDITOR_DATA_LINES)
368     {
369 sysadm 1.29 #ifdef _DEBUG
370     log_error("display_line_total over limit %d >= %d\n", p_editor_data->display_line_total, MAX_EDITOR_DATA_LINES);
371     #endif
372    
373 sysadm 1.15 // Terminate prior display line with \n, to avoid error on cleanup
374     if (display_line + i - 1 >= 0 && p_editor_data->display_line_lengths[display_line + i - 1] > 0)
375     {
376 sysadm 1.24 len = split_line(p_editor_data->p_display_lines[display_line + i - 1], SCREEN_COLS - 1, &eol, &display_len, 0);
377 sysadm 1.15 p_editor_data->p_display_lines[display_line + i - 1][len] = '\n';
378     p_editor_data->p_display_lines[display_line + i - 1][len + 1] = '\0';
379     p_editor_data->display_line_lengths[display_line + i - 1] = len + 1;
380 sysadm 1.39 p_editor_data->display_line_widths[display_line + i - 1] = display_len;
381 sysadm 1.15 }
382     if (*p_offset >= p_editor_data->display_line_lengths[*p_display_line])
383     {
384     *p_offset = p_editor_data->display_line_lengths[*p_display_line] - 1;
385     }
386     break;
387 sysadm 1.4 }
388 sysadm 1.32
389     // for (j = p_editor_data->display_line_total; j > last_display_line + 1; j--)
390     // {
391     // p_editor_data->p_display_lines[j] = p_editor_data->p_display_lines[j - 1];
392     // p_editor_data->display_line_lengths[j] = p_editor_data->display_line_lengths[j - 1];
393 sysadm 1.39 // p_editor_data->display_line_widths[j] = p_editor_data->display_line_widths[j - 1];
394 sysadm 1.32 // }
395     memmove(p_editor_data->p_display_lines + last_display_line + 2,
396     p_editor_data->p_display_lines + last_display_line + 1,
397     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
398     sizeof(p_editor_data->p_display_lines[last_display_line + 1]));
399     memmove(p_editor_data->display_line_lengths + last_display_line + 2,
400     p_editor_data->display_line_lengths + last_display_line + 1,
401     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
402     sizeof(p_editor_data->display_line_lengths[last_display_line + 1]));
403 sysadm 1.39 memmove(p_editor_data->display_line_widths + last_display_line + 2,
404     p_editor_data->display_line_widths + last_display_line + 1,
405     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
406     sizeof(p_editor_data->display_line_widths[last_display_line + 1]));
407 sysadm 1.32
408 sysadm 1.4 last_display_line++;
409 sysadm 1.32 *p_last_updated_line = p_editor_data->display_line_total;
410 sysadm 1.4 (p_editor_data->display_line_total)++;
411 sysadm 1.2 }
412    
413 sysadm 1.4 p_editor_data->display_line_lengths[display_line + i] = line_offsets[i + 1] - line_offsets[i];
414 sysadm 1.39 p_editor_data->display_line_widths[display_line + i] = line_widths[i];
415 sysadm 1.4 p_editor_data->p_display_lines[display_line + i] =
416     (i == 0
417     ? p_data_line
418     : (p_editor_data->p_display_lines[display_line + i - 1] + p_editor_data->display_line_lengths[display_line + i - 1]));
419 sysadm 1.2
420 sysadm 1.4 if (p_editor_data->display_line_lengths[display_line + i] > 0 &&
421     p_editor_data->p_display_lines[display_line + i][p_editor_data->display_line_lengths[display_line + i] - 1] == '\n')
422 sysadm 1.3 {
423 sysadm 1.4 break;
424 sysadm 1.3 }
425 sysadm 1.4 }
426 sysadm 1.3
427 sysadm 1.7 *p_last_updated_line = MAX(display_line + MIN(i, split_line_total - 1), *p_last_updated_line);
428 sysadm 1.2
429 sysadm 1.14 if (*p_offset >= p_editor_data->display_line_lengths[*p_display_line])
430 sysadm 1.3 {
431 sysadm 1.18 if (*p_display_line + 1 < p_editor_data->display_line_total)
432 sysadm 1.15 {
433 sysadm 1.18 *p_offset -= p_editor_data->display_line_lengths[*p_display_line];
434 sysadm 1.15 (*p_display_line)++;
435     }
436 sysadm 1.22 }
437    
438     // Prevent the last display line from being over-length
439     if (p_editor_data->display_line_total == MAX_EDITOR_DATA_LINES)
440     {
441 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);
442 sysadm 1.22 p_editor_data->p_display_lines[p_editor_data->display_line_total - 1][len] = '\0';
443     p_editor_data->display_line_lengths[p_editor_data->display_line_total - 1] = len;
444 sysadm 1.39 p_editor_data->display_line_widths[p_editor_data->display_line_total - 1] = display_len;
445 sysadm 1.22 if (*p_display_line + 1 >= p_editor_data->display_line_total)
446 sysadm 1.20 {
447 sysadm 1.22 *p_offset = MIN(*p_offset, len);
448     *p_display_line = p_editor_data->display_line_total - 1;
449 sysadm 1.20 }
450 sysadm 1.3 }
451    
452 sysadm 1.4 return 0;
453 sysadm 1.2 }
454    
455 sysadm 1.23 int editor_data_delete(EDITOR_DATA *p_editor_data, long *p_display_line, long *p_offset,
456 sysadm 1.49 long *p_last_updated_line, int del_line)
457 sysadm 1.2 {
458 sysadm 1.23 long display_line = *p_display_line;
459     long offset = *p_offset;
460 sysadm 1.7 char *p_data_line = NULL;
461     long len_data_line;
462     long offset_data_line;
463     long last_display_line; // of data line
464     long line_offsets[MAX_EDITOR_DATA_LINE_LENGTH + 1];
465 sysadm 1.39 int line_widths[MAX_EDITOR_DATA_LINE_LENGTH + 1];
466 sysadm 1.7 long split_line_total;
467     long i, j;
468     int str_len = 0;
469 sysadm 1.39 char c;
470 sysadm 1.7
471     if (p_editor_data == NULL || p_last_updated_line == NULL)
472     {
473 sysadm 1.46 log_error("NULL pointer error\n");
474 sysadm 1.7 return -1;
475     }
476    
477     // Get length of current data line
478     len_data_line = 0;
479     p_data_line = p_editor_data->p_display_lines[display_line];
480     for (i = display_line - 1; i >= 0; i--)
481     {
482     if (p_editor_data->display_line_lengths[i] > 0 &&
483     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of prior data line
484     {
485     break;
486     }
487    
488     len_data_line += p_editor_data->display_line_lengths[i];
489     p_data_line = p_editor_data->p_display_lines[i];
490     }
491     offset_data_line = len_data_line + offset;
492     last_display_line = p_editor_data->display_line_total - 1;
493     for (i = display_line; i < p_editor_data->display_line_total; i++)
494     {
495     len_data_line += p_editor_data->display_line_lengths[i];
496    
497     if (p_editor_data->display_line_lengths[i] > 0 &&
498     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
499     {
500     last_display_line = i;
501     break;
502     }
503     }
504    
505 sysadm 1.18 if (offset_data_line >= len_data_line) // end-of-line
506     {
507     return 0;
508     }
509    
510 sysadm 1.7 // Check str to be deleted
511 sysadm 1.49 if (del_line)
512     {
513     str_len = (int)(p_editor_data->display_line_lengths[display_line] - offset);
514     }
515     else if (p_data_line[offset_data_line] > 0 && p_data_line[offset_data_line] < 127)
516 sysadm 1.7 {
517     str_len = 1;
518     }
519 sysadm 1.48 else if (p_data_line[offset_data_line] & 0x80) // head of multi-byte character
520 sysadm 1.7 {
521 sysadm 1.39 str_len = 1;
522 sysadm 1.48 c = (p_data_line[offset_data_line] & 0x70) << 1;
523     while (c & 0x80)
524 sysadm 1.39 {
525     str_len++;
526 sysadm 1.48 c = (c & 0x7f) << 1;
527 sysadm 1.39 }
528 sysadm 1.7 }
529     else
530     {
531 sysadm 1.18 log_error("Some strange character at display_line %ld, offset %ld: %d %d\n",
532     display_line, offset, p_data_line[offset_data_line], p_data_line[offset_data_line + 1]);
533 sysadm 1.10 str_len = 1;
534 sysadm 1.7 }
535    
536     // Current display line is (almost) empty
537     if (offset_data_line + str_len > len_data_line ||
538 sysadm 1.49 (offset_data_line + str_len == len_data_line &&
539     p_data_line[del_line ? len_data_line - 1 : offset_data_line] == '\n'))
540 sysadm 1.7 {
541 sysadm 1.9 if (display_line + 1 >= p_editor_data->display_line_total) // No additional display line (data line)
542     {
543     return 0;
544     }
545    
546     len_data_line = 0; // Next data line
547     last_display_line = p_editor_data->display_line_total - 1;
548     for (i = display_line + 1; i < p_editor_data->display_line_total; i++)
549     {
550     len_data_line += p_editor_data->display_line_lengths[i];
551    
552     if (p_editor_data->display_line_lengths[i] > 0 &&
553     p_editor_data->p_display_lines[i][p_editor_data->display_line_lengths[i] - 1] == '\n') // reach end of current data line
554     {
555     last_display_line = i;
556     break;
557     }
558     }
559    
560     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
561     {
562     return 0;
563     }
564    
565     // Append next data line to current one
566     memcpy(p_data_line + offset_data_line, p_editor_data->p_display_lines[display_line + 1], (size_t)len_data_line);
567     p_data_line[offset_data_line + len_data_line] = '\0';
568    
569     // Recycle next data line
570 sysadm 1.16 memory_pool_free(p_mp_data_line, p_editor_data->p_display_lines[display_line + 1]);
571 sysadm 1.9 }
572     else
573     {
574     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));
575     p_data_line[len_data_line - str_len] = '\0';
576     len_data_line -= str_len;
577 sysadm 1.7 }
578    
579     // Set p_data_line to head of current display line
580     p_data_line = p_editor_data->p_display_lines[display_line];
581     split_line_total = last_display_line - display_line + 2;
582    
583     // Split current data line since beginning of current display line
584 sysadm 1.39 split_line_total = split_data_lines(p_data_line, SCREEN_COLS, line_offsets, split_line_total, 0, line_widths);
585 sysadm 1.7
586     for (i = 0; i < split_line_total; i++)
587     {
588     p_editor_data->display_line_lengths[display_line + i] = line_offsets[i + 1] - line_offsets[i];
589 sysadm 1.39 p_editor_data->display_line_widths[display_line + i] = line_widths[i];
590 sysadm 1.7 p_editor_data->p_display_lines[display_line + i] =
591     (i == 0
592     ? p_data_line
593     : (p_editor_data->p_display_lines[display_line + i - 1] + p_editor_data->display_line_lengths[display_line + i - 1]));
594    
595     if (p_editor_data->display_line_lengths[display_line + i] > 0 &&
596     p_editor_data->p_display_lines[display_line + i][p_editor_data->display_line_lengths[display_line + i] - 1] == '\n')
597     {
598     break;
599     }
600     }
601    
602     *p_last_updated_line = display_line + MIN(i, split_line_total - 1);
603    
604 sysadm 1.18 if (*p_last_updated_line < last_display_line)
605 sysadm 1.7 {
606     // Remove redundant display line after last_display_line
607 sysadm 1.32 // for (j = last_display_line + 1; j < p_editor_data->display_line_total; j++)
608     // {
609     // p_editor_data->p_display_lines[j - (last_display_line - *p_last_updated_line)] = p_editor_data->p_display_lines[j];
610     // p_editor_data->display_line_lengths[j - (last_display_line - *p_last_updated_line)] = p_editor_data->display_line_lengths[j];
611 sysadm 1.39 // p_editor_data->display_line_widths[j - (last_display_line - *p_last_updated_line)] = p_editor_data->display_line_widths[j];
612 sysadm 1.32 // }
613     memmove(p_editor_data->p_display_lines + *p_last_updated_line + 1,
614     p_editor_data->p_display_lines + last_display_line + 1,
615     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
616     sizeof(p_editor_data->p_display_lines[last_display_line + 1]));
617     memmove(p_editor_data->display_line_lengths + *p_last_updated_line + 1,
618     p_editor_data->display_line_lengths + last_display_line + 1,
619     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
620     sizeof(p_editor_data->display_line_lengths[last_display_line + 1]));
621 sysadm 1.39 memmove(p_editor_data->display_line_widths + *p_last_updated_line + 1,
622     p_editor_data->display_line_widths + last_display_line + 1,
623     (size_t)(p_editor_data->display_line_total - last_display_line - 1) *
624     sizeof(p_editor_data->display_line_widths[last_display_line + 1]));
625 sysadm 1.7
626 sysadm 1.18 j = p_editor_data->display_line_total;
627     (p_editor_data->display_line_total) -= (last_display_line - *p_last_updated_line);
628     *p_last_updated_line = MAX(j - 1, *p_last_updated_line);
629 sysadm 1.7 }
630    
631 sysadm 1.23 // Return real offset
632     *p_offset = offset;
633    
634 sysadm 1.9 return str_len;
635 sysadm 1.2 }
636    
637     static int editor_display_key_handler(int *p_key, EDITOR_CTX *p_ctx)
638 sysadm 1.1 {
639     switch (*p_key)
640     {
641     case 0: // Set msg
642     snprintf(p_ctx->msg, sizeof(p_ctx->msg),
643 sysadm 1.55 "| 退出[\033[32mCtrl-W\033[33m] | [\033[32m%s\033[33m]",
644     (UTF8_fixed_width ? "定宽" : "变宽"));
645 sysadm 1.1 break;
646 sysadm 1.24 case KEY_CSI:
647     *p_key = KEY_ESC;
648     break;
649 sysadm 1.1 }
650    
651     return 0;
652     }
653    
654     int editor_display(EDITOR_DATA *p_editor_data)
655     {
656     static int show_help = 1;
657     char buffer[MAX_EDITOR_DATA_LINE_LENGTH];
658 sysadm 1.2 EDITOR_CTX ctx;
659 sysadm 1.1 int ch = 0;
660 sysadm 1.55 char input_str[5];
661 sysadm 1.56 int str_len = 0;
662 sysadm 1.55 wchar_t wcs[2];
663 sysadm 1.56 int wc_len;
664 sysadm 1.39 char c;
665 sysadm 1.3 int input_ok;
666     const int screen_begin_row = 1;
667 sysadm 1.14 const int screen_row_total = SCREEN_ROWS - screen_begin_row;
668     int output_current_row = screen_begin_row;
669     int output_end_row = SCREEN_ROWS - 1;
670 sysadm 1.1 long int line_current = 0;
671     long int len;
672     int loop;
673     int eol, display_len;
674     long row_pos = 1, col_pos = 1;
675 sysadm 1.3 long display_line_in, offset_in;
676     long display_line_out, offset_out;
677     int scroll_rows;
678 sysadm 1.2 long last_updated_line = 0;
679 sysadm 1.8 int key_insert = 1;
680 sysadm 1.12 int i, j;
681     char *p_str;
682 sysadm 1.49 int del_line;
683 sysadm 1.58 int tab_width = 0;
684 sysadm 1.1
685 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
686 sysadm 1.1
687     // update msg_ext with extended key handler
688     if (editor_display_key_handler(&ch, &ctx) != 0)
689     {
690     return ch;
691     }
692    
693 sysadm 1.35 for (loop = 1; !SYS_server_exit && loop;)
694 sysadm 1.1 {
695 sysadm 1.14 if (line_current >= p_editor_data->display_line_total || output_current_row > output_end_row)
696 sysadm 1.1 {
697 sysadm 1.14 ctx.line_cursor = line_current - output_current_row + row_pos + 1;
698 sysadm 1.1
699     snprintf(buffer, sizeof(buffer),
700 sysadm 1.2 "\033[1;44;33m[\033[32m%ld\033[33m;\033[32m%ld\033[33m] "
701 sysadm 1.39 "第\033[32m%ld\033[33m/\033[32m%ld\033[33m行 [\033[32m%s\033[33m] "
702 sysadm 1.2 "%s",
703     row_pos, col_pos,
704     ctx.line_cursor, p_editor_data->display_line_total,
705 sysadm 1.39 key_insert ? "插入" : "替换",
706 sysadm 1.1 ctx.msg);
707    
708 sysadm 1.24 len = split_line(buffer, SCREEN_COLS, &eol, &display_len, 1);
709 sysadm 1.1 for (; display_len < SCREEN_COLS; display_len++)
710     {
711     buffer[len++] = ' ';
712     }
713     buffer[len] = '\0';
714     strncat(buffer, "\033[m", sizeof(buffer) - 1 - strnlen(buffer, sizeof(buffer)));
715    
716     moveto(SCREEN_ROWS, 0);
717     prints("%s", buffer);
718    
719     moveto((int)row_pos, (int)col_pos);
720     iflush();
721    
722 sysadm 1.58 tab_width = 0;
723 sysadm 1.25 str_len = 0;
724 sysadm 1.53 ch = igetch_t(BBS_max_user_idle_time);
725 sysadm 1.33 while (!SYS_server_exit)
726 sysadm 1.1 {
727 sysadm 1.47 if (ch != KEY_NULL && ch != KEY_TIMEOUT)
728     {
729     BBS_last_access_tm = time(NULL);
730     }
731    
732 sysadm 1.1 // extended key handler
733     if (editor_display_key_handler(&ch, &ctx) != 0)
734     {
735     goto cleanup;
736     }
737    
738 sysadm 1.58 if (ch == '\t')
739     {
740     ch = ' ';
741     tab_width = TAB_SIZE - ((int)(col_pos - 1) % TAB_SIZE) - 1;
742     }
743    
744 sysadm 1.48 if (ch < 256 && (ch & 0x80)) // head of multi-byte character
745 sysadm 1.3 {
746     str_len = 0;
747 sysadm 1.48 c = (char)(ch & 0xf0);
748     while (c & 0x80)
749 sysadm 1.39 {
750     input_str[str_len] = (char)(ch - 256);
751     str_len++;
752 sysadm 1.48 c = (c & 0x7f) << 1;
753 sysadm 1.39
754 sysadm 1.48 if ((c & 0x80) == 0) // Input completed
755 sysadm 1.39 {
756     break;
757     }
758    
759     // Expect additional bytes of input
760     ch = igetch(100); // 0.1 second
761     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Ignore received bytes if no futher input
762     {
763 sysadm 1.40 #ifdef _DEBUG
764 sysadm 1.39 log_error("Ignore %d bytes of incomplete UTF8 character\n", str_len);
765 sysadm 1.40 #endif
766 sysadm 1.39 str_len = 0;
767     break;
768     }
769     }
770 sysadm 1.55 input_str[str_len] = '\0';
771 sysadm 1.3 }
772    
773 sysadm 1.39 if ((ch >= 32 && ch < 127) || str_len >= 2 || // Printable character or multi-byte character
774     ch == CR || ch == KEY_ESC) // Special character
775 sysadm 1.2 {
776 sysadm 1.43 // Refresh current action while user input
777     if (user_online_update(NULL) < 0)
778     {
779     log_error("user_online_update(NULL) error\n");
780     }
781    
782 sysadm 1.21 if (str_len == 0) // ch >= 32 && ch < 127
783 sysadm 1.3 {
784 sysadm 1.4 input_str[0] = (char)ch;
785 sysadm 1.3 str_len = 1;
786     }
787    
788 sysadm 1.14 display_line_in = line_current - output_current_row + row_pos;
789 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[display_line_in], (int)col_pos - 1, &eol, &display_len, 0);
790 sysadm 1.3 display_line_out = display_line_in;
791     offset_out = offset_in;
792 sysadm 1.2
793 sysadm 1.32 last_updated_line = display_line_in;
794    
795 sysadm 1.8 if (!key_insert) // overwrite
796     {
797 sysadm 1.23 if (editor_data_delete(p_editor_data, &display_line_out, &offset_out,
798 sysadm 1.49 &last_updated_line, 0) < 0)
799 sysadm 1.8 {
800     log_error("editor_data_delete() error\n");
801     }
802     }
803    
804 sysadm 1.3 if (editor_data_insert(p_editor_data, &display_line_out, &offset_out,
805 sysadm 1.4 input_str, str_len, &last_updated_line) < 0)
806 sysadm 1.2 {
807 sysadm 1.14 log_error("editor_data_insert(str_len=%d) error\n", str_len);
808 sysadm 1.2 }
809     else
810     {
811 sysadm 1.14 output_end_row = MIN(SCREEN_ROWS - 1, output_current_row + (int)(last_updated_line - line_current));
812     line_current -= (output_current_row - row_pos);
813     output_current_row = (int)row_pos;
814 sysadm 1.2
815 sysadm 1.14 scroll_rows = MAX(0, (int)(display_line_out - display_line_in) - (output_end_row - output_current_row));
816 sysadm 1.2
817 sysadm 1.3 if (scroll_rows > 0)
818 sysadm 1.2 {
819 sysadm 1.3 moveto(SCREEN_ROWS, 0);
820     clrtoeol();
821     for (i = 0; i < scroll_rows; i++)
822     {
823 sysadm 1.36 // prints("\033[S"); // Scroll up 1 line
824     prints("\n"); // Legacy Cterm only works with this line
825 sysadm 1.3 }
826 sysadm 1.2
827 sysadm 1.14 output_current_row -= scroll_rows;
828     if (output_current_row < screen_begin_row)
829 sysadm 1.2 {
830 sysadm 1.14 line_current += (screen_begin_row - output_current_row);
831     output_current_row = screen_begin_row;
832 sysadm 1.2 }
833 sysadm 1.14 row_pos = output_end_row;
834 sysadm 1.3 }
835     else // if (scroll_lines == 0)
836     {
837     row_pos += (display_line_out - display_line_in);
838 sysadm 1.2 }
839 sysadm 1.39
840     if (offset_out != offset_in)
841     {
842     if (display_line_out != display_line_in)
843     {
844     col_pos = 1;
845     }
846 sysadm 1.42 if (offset_out > 0)
847 sysadm 1.39 {
848 sysadm 1.55 if (mbstowcs(wcs, input_str, 1) == (size_t)-1)
849     {
850     log_error("mbstowcs() error\n");
851     }
852     col_pos += (str_len == 1 ? 1 : (UTF8_fixed_width ? 2 : wcwidth(wcs[0])));
853 sysadm 1.39 }
854     }
855 sysadm 1.11 }
856 sysadm 1.3
857 sysadm 1.25 if (display_line_out != display_line_in) // Output on line change
858     {
859     break;
860     }
861    
862 sysadm 1.58 if (ch == ' ' && tab_width > 0)
863     {
864     tab_width--;
865     }
866     else
867 sysadm 1.25 {
868 sysadm 1.58 ch = igetch(0);
869     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Output if no futher input
870     {
871     break;
872     }
873 sysadm 1.25 }
874    
875 sysadm 1.21 str_len = 0;
876 sysadm 1.11 continue;
877 sysadm 1.2 }
878 sysadm 1.49 else if (ch == KEY_DEL || ch == BACKSPACE || ch == Ctrl('K') || ch == Ctrl('Y')) // Del
879 sysadm 1.2 {
880 sysadm 1.43 // Refresh current action while user input
881     if (user_online_update(NULL) < 0)
882     {
883     log_error("user_online_update(NULL) error\n");
884     }
885    
886 sysadm 1.49 del_line = 0;
887    
888 sysadm 1.9 if (ch == BACKSPACE)
889     {
890 sysadm 1.18 if (line_current - output_current_row + row_pos <= 0 && col_pos <= 1) // Forbidden
891     {
892 sysadm 1.34 break; // force output prior operation result if any
893 sysadm 1.18 }
894    
895 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
896     (int)col_pos - 1, &eol, &display_len, 0);
897 sysadm 1.55 col_pos = display_len;
898 sysadm 1.14 if (col_pos < 1 && line_current - output_current_row + row_pos >= 0)
899 sysadm 1.9 {
900     row_pos--;
901 sysadm 1.39 col_pos = MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]);
902 sysadm 1.9 }
903     }
904 sysadm 1.49 else if (ch == Ctrl('K'))
905     {
906     del_line = 1;
907     }
908     else if (ch == Ctrl('Y'))
909     {
910     col_pos = 1;
911     del_line = 1;
912     }
913 sysadm 1.2
914 sysadm 1.23 display_line_in = line_current - output_current_row + row_pos;
915 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[display_line_in], (int)col_pos - 1, &eol, &display_len, 0);
916 sysadm 1.23 display_line_out = display_line_in;
917     offset_out = offset_in;
918    
919     if ((str_len = editor_data_delete(p_editor_data, &display_line_out, &offset_out,
920 sysadm 1.49 &last_updated_line, del_line)) < 0)
921 sysadm 1.2 {
922 sysadm 1.49 log_error("editor_data_delete() error: %d\n", str_len);
923 sysadm 1.2 }
924     else
925     {
926 sysadm 1.39 col_pos = display_len + 1; // Set col_pos to accurate pos
927 sysadm 1.9
928 sysadm 1.14 output_end_row = MIN(SCREEN_ROWS - 1, output_current_row + (int)(last_updated_line - line_current));
929     line_current -= (output_current_row - row_pos);
930     output_current_row = (int)row_pos;
931 sysadm 1.9
932 sysadm 1.14 if (output_current_row < screen_begin_row) // row_pos <= 0
933 sysadm 1.9 {
934 sysadm 1.14 output_current_row = screen_begin_row;
935 sysadm 1.9 row_pos = screen_begin_row;
936 sysadm 1.14 output_end_row = SCREEN_ROWS - 1;
937     }
938    
939     // Exceed end
940     if (line_current + (screen_row_total - output_current_row) >= p_editor_data->display_line_total &&
941     p_editor_data->display_line_total > screen_row_total)
942     {
943     scroll_rows = (int)((line_current - (output_current_row - screen_begin_row)) -
944     (p_editor_data->display_line_total - screen_row_total));
945    
946     line_current = p_editor_data->display_line_total - screen_row_total;
947     row_pos += scroll_rows;
948     output_current_row = screen_begin_row;
949     output_end_row = SCREEN_ROWS - 1;
950 sysadm 1.9 }
951 sysadm 1.18
952     clrline(output_current_row, output_end_row);
953 sysadm 1.2 }
954    
955 sysadm 1.25 if (display_line_out != display_line_in) // Output on line change
956     {
957     break;
958     }
959    
960     ch = igetch(0);
961     if (ch == KEY_NULL || ch == KEY_TIMEOUT) // Output if no futher input
962     {
963     break;
964     }
965    
966 sysadm 1.21 str_len = 0;
967 sysadm 1.2 continue;
968     }
969    
970 sysadm 1.25 input_ok = 1;
971 sysadm 1.1 switch (ch)
972     {
973     case KEY_NULL:
974 sysadm 1.47 log_error("KEY_NULL\n");
975     goto cleanup;
976 sysadm 1.1 case KEY_TIMEOUT:
977 sysadm 1.47 log_error("User input timeout\n");
978 sysadm 1.1 goto cleanup;
979 sysadm 1.17 case Ctrl('W'):
980 sysadm 1.41 case Ctrl('X'):
981 sysadm 1.1 loop = 0;
982     break;
983 sysadm 1.13 case Ctrl('S'): // Start of line
984 sysadm 1.2 case KEY_CTRL_LEFT:
985 sysadm 1.1 col_pos = 1;
986     break;
987 sysadm 1.13 case Ctrl('E'): // End of line
988 sysadm 1.2 case KEY_CTRL_RIGHT:
989 sysadm 1.23 if (line_current - output_current_row + row_pos == p_editor_data->display_line_total - 1) // row_pos at end line
990 sysadm 1.22 {
991     // last display line does NOT have \n in the end
992 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
993 sysadm 1.22 break;
994     }
995 sysadm 1.39 col_pos = MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]);
996 sysadm 1.1 break;
997 sysadm 1.13 case Ctrl('T'): // Top of screen
998 sysadm 1.2 case KEY_CTRL_UP:
999 sysadm 1.3 row_pos = screen_begin_row;
1000 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1001 sysadm 1.2 break;
1002 sysadm 1.13 case Ctrl('B'): // Bottom of screen
1003 sysadm 1.2 case KEY_CTRL_DOWN:
1004 sysadm 1.18 if (p_editor_data->display_line_total < screen_row_total)
1005     {
1006     row_pos = p_editor_data->display_line_total;
1007     }
1008     else
1009     {
1010     row_pos = SCREEN_ROWS - 1;
1011     }
1012     if (line_current + (screen_row_total - (output_current_row - screen_begin_row)) >= p_editor_data->display_line_total) // Reach end
1013     {
1014     // last display line does NOT have \n in the end
1015 sysadm 1.39 col_pos = MIN(col_pos, p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1);
1016 sysadm 1.18 }
1017     else
1018     {
1019 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1020 sysadm 1.18 }
1021 sysadm 1.2 break;
1022     case KEY_INS:
1023 sysadm 1.8 key_insert = !key_insert;
1024 sysadm 1.2 break;
1025 sysadm 1.1 case KEY_HOME:
1026     row_pos = 1;
1027     col_pos = 1;
1028 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1029 sysadm 1.1 {
1030     break;
1031     }
1032     line_current = 0;
1033 sysadm 1.14 output_current_row = screen_begin_row;
1034     output_end_row = SCREEN_ROWS - 1;
1035     clrline(output_current_row, SCREEN_ROWS);
1036 sysadm 1.1 break;
1037     case KEY_END:
1038 sysadm 1.3 if (p_editor_data->display_line_total < screen_row_total)
1039 sysadm 1.1 {
1040     row_pos = p_editor_data->display_line_total;
1041 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1042 sysadm 1.1 break;
1043     }
1044 sysadm 1.3 line_current = p_editor_data->display_line_total - screen_row_total;
1045 sysadm 1.14 output_current_row = screen_begin_row;
1046     output_end_row = SCREEN_ROWS - 1;
1047     row_pos = SCREEN_ROWS - 1;
1048 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1049 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1050 sysadm 1.1 break;
1051     case KEY_LEFT:
1052 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
1053     (int)col_pos - 1, &eol, &display_len, 0);
1054 sysadm 1.55 col_pos = display_len;
1055 sysadm 1.56 if (offset_in > 0)
1056 sysadm 1.39 {
1057 sysadm 1.56 str_len = 1;
1058     offset_in--;
1059     if (p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] < 0 ||
1060     p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] > 127) // UTF8
1061 sysadm 1.55 {
1062 sysadm 1.56 while (offset_in > 0 &&
1063     (p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] & 0xc0) != 0xc0)
1064     {
1065     str_len++;
1066     offset_in--;
1067     }
1068    
1069     if (str_len > 4)
1070     {
1071     log_error("Invalid UTF-8 data detected: str_len > 4\n");
1072     }
1073    
1074     if (mbstowcs(wcs, p_editor_data->p_display_lines[line_current - output_current_row + row_pos] + offset_in, 1) ==
1075     (size_t)-1)
1076     {
1077     log_error("mbstowcs() error\n");
1078     }
1079     wc_len = (UTF8_fixed_width ? 2 : wcwidth(wcs[0]));
1080    
1081     if (wc_len == 2)
1082     {
1083     col_pos--;
1084     }
1085 sysadm 1.55 }
1086 sysadm 1.39 }
1087     if (col_pos >= 1)
1088 sysadm 1.1 {
1089     break;
1090     }
1091     col_pos = SCREEN_COLS; // continue to KEY_UP
1092     case KEY_UP:
1093 sysadm 1.3 if (row_pos > screen_begin_row)
1094 sysadm 1.1 {
1095     row_pos--;
1096 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1097 sysadm 1.1 break;
1098     }
1099 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1100 sysadm 1.1 {
1101 sysadm 1.2 col_pos = 1;
1102 sysadm 1.1 break;
1103     }
1104 sysadm 1.14 line_current -= output_current_row;
1105     output_current_row = screen_begin_row;
1106 sysadm 1.1 // screen_end_line = begin_line;
1107     // prints("\033[T"); // Scroll down 1 line
1108 sysadm 1.14 output_end_row = SCREEN_ROWS - 1; // Legacy Fterm only works with this line
1109 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1110 sysadm 1.1 break;
1111     case KEY_RIGHT:
1112 sysadm 1.39 offset_in = split_line(p_editor_data->p_display_lines[line_current - output_current_row + row_pos],
1113     (int)col_pos - 1, &eol, &display_len, 0);
1114 sysadm 1.55 col_pos = display_len + 2;
1115 sysadm 1.56 if (offset_in < p_editor_data->display_line_lengths[line_current - output_current_row + row_pos])
1116 sysadm 1.39 {
1117 sysadm 1.56 str_len = 0;
1118     if ((p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] & 0x80) ==
1119     0x80) // head of multi-byte character
1120     {
1121     c = (char)(p_editor_data->p_display_lines[line_current - output_current_row + row_pos][offset_in] & 0xf0);
1122     while (c & 0x80)
1123     {
1124     str_len++;
1125     c = (c & 0x7f) << 1;
1126     }
1127    
1128     if (str_len > 4)
1129     {
1130     log_error("Invalid UTF-8 data detected: str_len > 4\n");
1131     }
1132    
1133     if (mbstowcs(wcs, p_editor_data->p_display_lines[line_current - output_current_row + row_pos] + offset_in, 1) ==
1134     (size_t)-1)
1135     {
1136     log_error("mbstowcs() error\n");
1137     }
1138     wc_len = (UTF8_fixed_width ? 2 : wcwidth(wcs[0]));
1139    
1140     if (wc_len == 2)
1141     {
1142     col_pos++;
1143     }
1144     }
1145     else
1146 sysadm 1.55 {
1147 sysadm 1.56 str_len = 1;
1148 sysadm 1.55 }
1149 sysadm 1.56 offset_in += str_len;
1150 sysadm 1.39 }
1151     if (col_pos <= p_editor_data->display_line_widths[line_current - output_current_row + row_pos])
1152 sysadm 1.1 {
1153     break;
1154     }
1155     col_pos = 1; // continue to KEY_DOWN
1156     case KEY_DOWN:
1157 sysadm 1.3 if (row_pos < MIN(screen_row_total, p_editor_data->display_line_total))
1158 sysadm 1.1 {
1159     row_pos++;
1160 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1161 sysadm 1.1 break;
1162     }
1163 sysadm 1.23 if (line_current - output_current_row + row_pos == p_editor_data->display_line_total - 1) // row_pos at end line
1164 sysadm 1.1 {
1165 sysadm 1.18 // last display line does NOT have \n in the end
1166 sysadm 1.39 col_pos = p_editor_data->display_line_widths[line_current - output_current_row + row_pos] + 1;
1167 sysadm 1.1 break;
1168     }
1169 sysadm 1.14 line_current += (screen_row_total - (output_current_row - screen_begin_row));
1170     output_current_row = screen_row_total;
1171     output_end_row = SCREEN_ROWS - 1;
1172 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1173 sysadm 1.1 moveto(SCREEN_ROWS, 0);
1174     clrtoeol();
1175 sysadm 1.36 // prints("\033[S"); // Scroll up 1 line
1176     prints("\n"); // Legacy Cterm only works with this line
1177 sysadm 1.1 break;
1178     case KEY_PGUP:
1179 sysadm 1.14 if (line_current - output_current_row < 0) // Reach begin
1180 sysadm 1.1 {
1181     break;
1182     }
1183 sysadm 1.14 line_current -= ((screen_row_total - 1) + (output_current_row - screen_begin_row));
1184 sysadm 1.1 if (line_current < 0)
1185     {
1186     line_current = 0;
1187     }
1188 sysadm 1.14 output_current_row = screen_begin_row;
1189     output_end_row = SCREEN_ROWS - 1;
1190 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1191 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1192 sysadm 1.1 break;
1193     case KEY_PGDN:
1194 sysadm 1.14 if (line_current + screen_row_total - (output_current_row - screen_begin_row) >= p_editor_data->display_line_total) // Reach end
1195 sysadm 1.1 {
1196     break;
1197     }
1198 sysadm 1.14 line_current += (screen_row_total - 1) - (output_current_row - screen_begin_row);
1199 sysadm 1.3 if (line_current + screen_row_total > p_editor_data->display_line_total) // No enough lines to display
1200 sysadm 1.1 {
1201 sysadm 1.3 line_current = p_editor_data->display_line_total - screen_row_total;
1202 sysadm 1.1 }
1203 sysadm 1.14 output_current_row = screen_begin_row;
1204     output_end_row = SCREEN_ROWS - 1;
1205 sysadm 1.39 col_pos = MIN(col_pos, MAX(1, p_editor_data->display_line_widths[line_current - output_current_row + row_pos]));
1206 sysadm 1.14 clrline(output_current_row, SCREEN_ROWS);
1207 sysadm 1.1 break;
1208 sysadm 1.44 case Ctrl('Q'):
1209 sysadm 1.1 case KEY_F1:
1210 sysadm 1.50 if (!show_help) // Not re-entrant
1211 sysadm 1.1 {
1212     break;
1213     }
1214     // Display help information
1215     show_help = 0;
1216 sysadm 1.50 display_file(DATA_EDITOR_HELP, 1);
1217 sysadm 1.1 show_help = 1;
1218     case KEY_F5:
1219     // Refresh after display help information
1220 sysadm 1.14 line_current -= (output_current_row - screen_begin_row);
1221     output_current_row = screen_begin_row;
1222     output_end_row = SCREEN_ROWS - 1;
1223     clrline(output_current_row, SCREEN_ROWS);
1224 sysadm 1.1 break;
1225     case 0: // Refresh bottom line
1226     break;
1227     default:
1228     input_ok = 0;
1229     break;
1230     }
1231    
1232 sysadm 1.43 // Refresh current action while user input
1233     if (user_online_update(NULL) < 0)
1234     {
1235     log_error("user_online_update(NULL) error\n");
1236     }
1237    
1238 sysadm 1.14 if (input_ok)
1239 sysadm 1.11 {
1240 sysadm 1.14 break;
1241 sysadm 1.11 }
1242 sysadm 1.25
1243 sysadm 1.53 ch = igetch_t(BBS_max_user_idle_time);
1244 sysadm 1.1 }
1245    
1246     continue;
1247     }
1248    
1249     len = p_editor_data->display_line_lengths[line_current];
1250     if (len >= sizeof(buffer))
1251     {
1252     log_error("Buffer overflow: len=%ld line=%ld \n", len, line_current);
1253     len = sizeof(buffer) - 1;
1254     }
1255     else if (len < 0)
1256     {
1257     log_error("Incorrect line offsets: len=%ld line=%ld \n", len, line_current);
1258     len = 0;
1259     }
1260    
1261 sysadm 1.12 // memcpy(buffer, p_editor_data->p_display_lines[line_current], (size_t)len);
1262     // Replace '\033' with '*'
1263     p_str = p_editor_data->p_display_lines[line_current];
1264     for (i = 0, j = 0; i < len; i++)
1265     {
1266     if (p_str[i] == '\033')
1267     {
1268     memcpy(buffer + j, EDITOR_ESC_DISPLAY_STR, sizeof(EDITOR_ESC_DISPLAY_STR) - 1);
1269     j += (int)(sizeof(EDITOR_ESC_DISPLAY_STR) - 1);
1270     }
1271     else
1272     {
1273     buffer[j] = p_str[i];
1274     j++;
1275     }
1276     }
1277     buffer[j] = '\0';
1278 sysadm 1.1
1279 sysadm 1.14 moveto(output_current_row, 0);
1280 sysadm 1.1 clrtoeol();
1281     prints("%s", buffer);
1282     line_current++;
1283 sysadm 1.14 output_current_row++;
1284 sysadm 1.1 }
1285    
1286     cleanup:
1287     return ch;
1288     }
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