source:
history.c
@
a8c55b5
Last change on this file since a8c55b5 was 25891a8, checked in by David Benjamin <davidben@mit.edu>, 13 years ago | |
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File size: 1.6 KB |
Rev | Line | |
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[7d4fbcd] | 1 | #include "owl.h" |
2 | ||
[70b53ec] | 3 | void owl_history_init(owl_history *h) |
4 | { | |
[95b52d1] | 5 | g_queue_init(&h->hist); |
6 | h->cur = h->hist.tail; /* current position in history */ | |
[b470451] | 7 | h->partial = false; /* is the 0th element is partially composed? */ |
[7d4fbcd] | 8 | } |
9 | ||
[25891a8] | 10 | void owl_history_cleanup(owl_history *h) |
11 | { | |
12 | g_queue_foreach(&h->hist, (GFunc)g_free, NULL); | |
13 | g_queue_clear(&h->hist); | |
14 | } | |
15 | ||
[e19eb97] | 16 | const char *owl_history_get_prev(owl_history *h) |
[70b53ec] | 17 | { |
[10b866d] | 18 | if (!h) return NULL; |
[7d4fbcd] | 19 | |
[95b52d1] | 20 | if (h->cur == NULL || g_list_previous(h->cur) == NULL) return NULL; |
[10b866d] | 21 | |
[95b52d1] | 22 | h->cur = g_list_previous(h->cur); |
23 | return h->cur->data; | |
[7d4fbcd] | 24 | } |
25 | ||
[e19eb97] | 26 | const char *owl_history_get_next(owl_history *h) |
[70b53ec] | 27 | { |
[10b866d] | 28 | if (!h) return NULL; |
[7d4fbcd] | 29 | |
[95b52d1] | 30 | if (h->cur == NULL || g_list_next(h->cur) == NULL) return NULL; |
31 | ||
32 | h->cur = g_list_next(h->cur); | |
33 | return h->cur->data; | |
[7d4fbcd] | 34 | } |
35 | ||
[b470451] | 36 | void owl_history_store(owl_history *h, const char *line, bool partial) |
[70b53ec] | 37 | { |
[10b866d] | 38 | if (!h) return; |
[12c35df] | 39 | |
[83a079a] | 40 | owl_history_reset(h); |
41 | ||
[43744ce] | 42 | /* check if the line is the same as the last */ |
[95b52d1] | 43 | if (!partial && !g_queue_is_empty(&h->hist) && |
44 | strcmp(line, g_queue_peek_tail(&h->hist)) == 0) | |
[8e515f9] | 45 | return; |
[5a9f6fe] | 46 | |
[7d4fbcd] | 47 | /* if we've reached the max history size, pop off the last element */ |
[25891a8] | 48 | if (g_queue_get_length(&h->hist) >= OWL_HISTORYSIZE) |
[95b52d1] | 49 | g_free(g_queue_pop_head(&h->hist)); |
[7d4fbcd] | 50 | |
51 | /* add the new line */ | |
[95b52d1] | 52 | g_queue_push_tail(&h->hist, g_strdup(line)); |
[b470451] | 53 | h->partial = partial; |
[95b52d1] | 54 | h->cur = h->hist.tail; |
[7d4fbcd] | 55 | } |
56 | ||
[70b53ec] | 57 | void owl_history_reset(owl_history *h) |
58 | { | |
[10b866d] | 59 | if (!h) return; |
[ad37b39] | 60 | |
61 | /* if partial is set, remove the first entry first */ | |
62 | if (h->partial) { | |
[95b52d1] | 63 | g_free(g_queue_pop_tail(&h->hist)); |
[b470451] | 64 | h->partial = false; |
[ad37b39] | 65 | } |
66 | ||
[95b52d1] | 67 | h->cur = h->hist.tail; |
[7d4fbcd] | 68 | } |
69 | ||
[1e94c0b] | 70 | int owl_history_is_touched(const owl_history *h) |
[70b53ec] | 71 | { |
[10b866d] | 72 | if (!h) return(0); |
[95b52d1] | 73 | return h->cur != NULL && g_list_next(h->cur) != NULL; |
[7d4fbcd] | 74 | } |
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