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

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