-
Notifications
You must be signed in to change notification settings - Fork 1
/
history.c
519 lines (453 loc) · 14.6 KB
/
history.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
/* This file is part of clipsim.
* Copyright (C) 2024 Lucas Mior
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "clipsim.h"
static volatile bool recovered = false;
static int32 lastindex;
static File history = { .file = NULL, .fd = -1, .name = NULL };
static char *XDG_CACHE_HOME = NULL;
static uint8 length_counts[ENTRY_MAX_LENGTH] = {0};
static int32 history_repeated_index(const char *, const int);
static void history_reorder(const int32);
static void history_free_entry(const Entry *);
static void history_clean(void);
static void history_save_image(char **, int *);
static void history_save_entry(Entry *, int);
int32
history_lastindex(void) {
DEBUG_PRINT("void");
return lastindex;
}
void history_backup(void) {
char buffer[PATH_MAX];
int n = snprintf(buffer, sizeof(buffer), "%s.bak", history.name);
if (n <= 0) {
error("Error in snprintf.\n");
exit(EXIT_FAILURE);
}
if (rename(history.name, buffer) < 0) {
error("Error creating backup history file: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
return;
}
void
history_save_entry(Entry *e, int index) {
DEBUG_PRINT("{\n %s,\n %d,\n %s,\n %d\n}",
e->content, e->content_length, e->trimmed, e->trimmed_length);
char image_save[PATH_MAX];
usize tag_size = sizeof(*(&IMAGE_TAG));
isize w;
if (e->image_path) {
int n;
char *base = basename(e->image_path);
n = snprintf(image_save, sizeof(image_save),
"%s/clipsim/%s", XDG_CACHE_HOME, base);
if (n < 0) {
error("Error printing image path.\n");
return;
}
if (strcmp(image_save, e->image_path)) {
if (util_copy_file(image_save, e->image_path) < 0) {
error("Error copying %s to %s: %s.\n",
e->image_path, image_save, strerror(errno));
history_remove(index);
return;
}
}
if (write(history.fd, image_save, (usize) n) < n) {
error("Error writing %s: %s\n", image_save, strerror(errno));
history_remove(index);
return;
}
if (write(history.fd, &IMAGE_TAG, tag_size) < (isize) tag_size) {
error("Error writing IMAGE_TAG: %s\n", strerror(errno));
history_remove(index);
return;
}
} else {
int left = e->content_length;
int offset = 0;
do {
w = write(history.fd, e->content + offset, (usize) left);
left -= w;
offset += w;
if (left == 0)
break;
} while (w > 0);
if (w < 0) {
error("Error writing %s: %s\n", e->content, strerror(errno));
history_remove(index);
return;
}
if (write(history.fd, &TEXT_TAG, tag_size) < (isize) tag_size) {
error("Error writing TEXT_TAG: %s\n", strerror(errno));
history_remove(index);
return;
}
}
return;
}
bool
history_save(void) {
DEBUG_PRINT("void");
int saved;
if (lastindex < 0) {
error("History is empty. Not saving.\n");
return false;
}
if (history.name == NULL) {
error("History file name unresolved, can't save history.");
return false;
}
if ((history.fd = open(history.name, O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR)) < 0) {
error("Error opening history file for saving: %s\n", strerror(errno));
return false;
}
for (int i = 0; i <= lastindex; i += 1)
history_save_entry(&entries[i], i);
if ((saved = fsync(history.fd)) < 0)
error("Error saving history to disk: %s\n", strerror(errno));
else
error("History saved to disk.\n");
util_close(&history);
return saved >= 0;
}
void
history_read(void) {
DEBUG_PRINT("void");
usize history_length;
char *history_map;
char *begin;
const char *clipsim = "clipsim/history";
usize length;
if ((XDG_CACHE_HOME = getenv("XDG_CACHE_HOME")) == NULL) {
error("XDG_CACHE_HOME needs to be set.\n");
exit(EXIT_FAILURE);
}
length = strlen(XDG_CACHE_HOME);
length += 1 + strlen(clipsim);
if (length > (PATH_MAX - 1)) {
error("XDG_CACHE_HOME is too long.\n");
exit(EXIT_FAILURE);
}
{
char buffer[PATH_MAX];
int n = snprintf(buffer, sizeof(buffer), "%s/%s",
XDG_CACHE_HOME, clipsim);
if (n < (int) length)
util_die_notify("Error printing to buffer: %s\n", strerror(errno));
buffer[sizeof(buffer) - 1] = '\0';
usize size = (usize) n + 1;
history.name = util_memdup(buffer, size);
char *clipsim_dir = dirname(buffer);
if (mkdir(clipsim_dir, 0770) < 0) {
if (errno != EEXIST) {
util_die_notify("Error creating dir %s: %s\n",
clipsim_dir, strerror(errno));
}
}
}
lastindex = -1;
if ((history.fd = open(history.name, O_RDONLY)) < 0) {
error("Error opening history file for reading: %s\n"
"History will start empty.\n", strerror(errno));
return;
}
{
struct stat history_stat;
if (fstat(history.fd, &history_stat) < 0) {
error("Error getting file information: %s\n"
"History will start empty.\n", strerror(errno));
util_close(&history);
return;
}
history_length = (usize) history_stat.st_size;
if (history_length <= 0) {
error("History_length: %zu\n", history_length);
error("History file is empty.\n");
util_close(&history);
return;
}
}
history_map = mmap(NULL, history_length,
PROT_READ | PROT_WRITE, MAP_PRIVATE,
history.fd, 0);
if (history_map == MAP_FAILED) {
error("Error mapping history file to memory: %s"
"History will start empty.\n", strerror(errno));
util_close(&history);
return;
}
begin = history_map;
for (char *p = history_map; p < history_map + history_length; p += 1) {
Entry *e;
char c;
if ((*p == TEXT_TAG) || (*p == IMAGE_TAG)) {
c = *p;
*p = '\0';
lastindex += 1;
e = &entries[lastindex];
e->content_length = (int) (p - begin);
e->content = util_memdup(begin, (usize) e->content_length + 1);
if (c == IMAGE_TAG) {
e->trimmed = e->content;
e->image_path = e->content;
e->trimmed_length = e->content_length;
} else {
content_trim_spaces(&e->trimmed, &e->trimmed_length,
e->content, e->content_length);
e->image_path = NULL;
}
begin = p + 1;
length_counts[e->content_length] += 1;
if (lastindex > HISTORY_BUFFER_SIZE)
break;
}
}
if (munmap(history_map, history_length) < 0) {
error("Error unmapping %p with %zu bytes: %s\n",
(void *) history_map, history_length, strerror(errno));
}
util_close(&history);
return;
}
int32
history_repeated_index(const char *content, const int length) {
DEBUG_PRINT("%s, %d", content, length);
int candidates = length_counts[length];
if (candidates == 0)
return -1;
for (int32 i = lastindex; i >= 0; i -= 1) {
Entry *e = &entries[i];
if (e->content_length != length)
continue;
if (!memcmp(e->content, content, (usize) length))
return i;
candidates -= 1;
if (candidates <= 0)
return -1;
}
return -1;
}
void
history_save_image(char **content, int *length) {
DEBUG_PRINT("%p, %d", (void *) content, *length);
time_t t = time(NULL);
int fp;
isize w = 0;
isize copied = 0;
int n;
char buffer[256];
char *directory = "/tmp/clipsim";
n = snprintf(buffer, sizeof(buffer), "%s/%lu.png", directory, t);
if (n < (int) strlen(directory))
util_die_notify("Error printing image path.\n");
buffer[sizeof(buffer) - 1] = '\0';
if ((fp = open(buffer, O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR)) < 0) {
util_die_notify("Error opening image file for saving: "
"%s\n", strerror(errno));
}
do {
w = write(fp, *(content + copied), (usize) *length);
if (w <= 0)
break;
copied += (usize) w;
*length -= (usize) w;
} while (*length > 0);
if (w < 0) {
error("Error writing to %s: %s\n", buffer, strerror(errno));
exit(EXIT_FAILURE);
}
*length = n;
*content = util_realloc(*content, (usize) *length + 1);
memcpy(*content, buffer, (usize) *length + 1);
return;
}
void
history_append(char *content, int length) {
DEBUG_PRINT("%s, %d", content, length);
int32 oldindex;
int32 kind;
Entry *e;
if (!content) {
error("Error getting data from clipboard. Skipping entry...\n");
recovered = false;
return;
}
if (recovered) {
recovered = false;
return;
}
kind = content_check_content((uchar *) content, length);
switch (kind) {
case CLIPBOARD_TEXT:
content_remove_newline(content, &length);
break;
case CLIPBOARD_IMAGE:
history_save_image(&content, &length);
break;
default:
return;
}
if ((oldindex = history_repeated_index(content, length)) >= 0) {
error("Entry is equal to previous entry. Reordering...\n");
if (oldindex != lastindex)
history_reorder(oldindex);
free(content);
return;
}
lastindex += 1;
e = &entries[lastindex];
e->content = content;
e->content_length = length;
length_counts[length] += 1;
switch (kind) {
case CLIPBOARD_TEXT:
content_trim_spaces(&(e->trimmed), &(e->trimmed_length),
e->content, e->content_length);
e->image_path = NULL;
break;
case CLIPBOARD_IMAGE:
e->trimmed = e->content;
e->trimmed_length = e->content_length;
e->image_path = e->content;
break;
default:
break;
}
if (lastindex + 1 >= HISTORY_BUFFER_SIZE) {
history_clean();
history_save();
}
return;
}
void
history_recover(int32 id) {
DEBUG_PRINT("%d", id);
pid_t child;
int fd[2];
Entry *e;
bool istext;
char *xclip = "xclip";
char *xclip_path = "/usr/bin/xclip";
if (lastindex < 0) {
error("Clipboard history empty. Start copying text.\n");
return;
}
if (id < 0)
id = lastindex + id + 1;
if (id > lastindex) {
error("Invalid index for recovery: %d\n", id);
recovered = true;
return;
}
e = &entries[id];
istext = (e->image_path == NULL);
if (istext) {
if (pipe(fd))
util_die_notify("Error creating pipe: %s\n", strerror(errno));
}
switch ((child = fork())) {
case 0:
if (istext) {
close(fd[1]);
dup2(fd[0], STDIN_FILENO);
close(fd[0]);
execl(xclip_path, xclip, "-selection", "clipboard", NULL);
} else {
execl(xclip_path, xclip, "-selection", "clipboard",
"-target", "image/png", e->image_path, NULL);
}
util_die_notify("Error in exec(%s): %s", xclip_path, strerror(errno));
case -1:
util_die_notify("Error in fork(%s): %s", xclip_path, strerror(errno));
default:
if (istext && (close(fd[0]) < 0))
util_die_notify("Error closing pipe 0: %s\n", strerror(errno));
}
if (istext) {
dprintf(fd[1], "%s", e->content);
if (close(fd[1]) < 0) {
util_die_notify("Error closing pipe 1: %s\n", strerror(errno));
}
}
if (wait(NULL) < 0)
util_die_notify("Error waiting for fork: %s\n", strerror(errno));
if (id != lastindex)
history_reorder(id);
recovered = true;
return;
}
void
history_remove(int32 id) {
DEBUG_PRINT("%d", id);
if (lastindex <= 0)
return;
if (id < 0) {
id = lastindex + id + 1;
} else if (id == lastindex) {
history_recover(-2);
history_remove(-2);
return;
}
if (id > lastindex) {
error("Invalid index %d for deletion.\n", id);
return;
}
history_free_entry(&entries[id]);
if (id < lastindex) {
memmove(&entries[id], &(entries[id + 1]),
(usize) (lastindex - id)*sizeof(*entries));
memset(&entries[lastindex], 0, sizeof(*entries));
}
lastindex -= 1;
return;
}
void
history_reorder(const int32 oldindex) {
DEBUG_PRINT("%d", oldindex);
Entry aux = entries[oldindex];
memmove(&entries[oldindex], &entries[oldindex + 1],
(usize) (lastindex - oldindex)*sizeof(*entries));
memmove(&entries[lastindex], &aux, sizeof(*entries));
return;
}
void
history_free_entry(const Entry *e) {
DEBUG_PRINT("{\n %s,\n %d,\n %s,\n %d\n}",
e->content, e->content_length, e->trimmed, e->trimmed_length);
length_counts[e->content_length] -= 1;
/* image_path does not have to be freed
* because e->content is the same pointer */
if (e->image_path)
unlink(e->image_path);
free(e->content);
if (e->trimmed != e->content)
free(e->trimmed);
return;
}
void
history_clean(void) {
DEBUG_PRINT("void");
for (int i = 0; i < HISTORY_KEEP_SIZE; i += 1)
history_free_entry(&entries[i]);
memcpy(&entries[0], &entries[HISTORY_KEEP_SIZE],
HISTORY_KEEP_SIZE * sizeof(*entries));
memset(&entries[HISTORY_KEEP_SIZE], 0,
HISTORY_KEEP_SIZE * sizeof(*entries));
lastindex = HISTORY_KEEP_SIZE - 1;
return;
}