source: history.c @ 32c331d

Last change on this file since 32c331d was 32c331d, checked in by Anders Kaseorg <andersk@mit.edu>, 10 years ago
history: Do not deduplicate a partial entry This fixes a bug that let you to remove the last item from your history by typing it again, pressing up and down, and erasing it. Signed-off-by: Anders Kaseorg <andersk@mit.edu>
  • Property mode set to 100644
File size: 1.7 KB
Line 
1#include "owl.h"
2
3void owl_history_init(owl_history *h)
4{
5  owl_list_create(&(h->hist));
6  h->cur=0;                     /* current position in history */
7  h->partial = false;           /* is the 0th element is partially composed? */
8}
9
10const char *owl_history_get_prev(owl_history *h)
11{
12
13  if (!h) return NULL;
14
15  if (owl_list_get_size(&(h->hist))==0) return(NULL);
16
17  if (h->cur == owl_list_get_size(&(h->hist))-1) {
18    return(NULL);
19  }
20
21  h->cur++;
22
23  return(owl_list_get_element(&(h->hist), h->cur));
24}
25
26const char *owl_history_get_next(owl_history *h)
27{
28  if (!h) return NULL;
29  if (owl_list_get_size(&(h->hist))==0) return(NULL);
30  if (h->cur==0) {
31    return(NULL);
32  }
33
34  h->cur--;
35  return(owl_list_get_element(&(h->hist), h->cur));
36}
37
38void owl_history_store(owl_history *h, const char *line, bool partial)
39{
40  int size;
41
42  if (!h) return;
43  size=owl_list_get_size(&(h->hist));
44
45  owl_history_reset(h);
46
47  /* check if the line is the same as the last */
48  if (!partial && owl_list_get_size(&(h->hist)) > 0 &&
49      strcmp(line, owl_list_get_element(&(h->hist), 0)) == 0)
50    return;
51
52  /* if we've reached the max history size, pop off the last element */
53  if (size>OWL_HISTORYSIZE) {
54    g_free(owl_list_get_element(&(h->hist), size-1));
55    owl_list_remove_element(&(h->hist), size-1);
56  }
57
58  /* add the new line */
59  owl_list_prepend_element(&(h->hist), g_strdup(line));
60  h->partial = partial;
61}
62
63void owl_history_reset(owl_history *h)
64{
65  if (!h) return;
66
67  /* if partial is set, remove the first entry first */
68  if (h->partial) {
69    g_free(owl_list_get_element(&(h->hist), 0));
70    owl_list_remove_element(&(h->hist), 0);
71    h->partial = false;
72  }
73
74  h->cur=0;
75}
76
77int owl_history_is_touched(const owl_history *h)
78{
79  if (!h) return(0);
80  return h->cur > 0;
81}
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