1 | #include "owl.h" |
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2 | |
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3 | void owl_history_init(owl_history *h) |
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4 | { |
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5 | owl_list_create(&(h->hist)); |
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6 | h->cur=0; /* current position in history */ |
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7 | h->touched=0; /* whether we've gone into history */ |
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8 | h->partial=0; /* is the 0th element is partially composed? */ |
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9 | h->repeats=1; /* by default we'll allow repeat entries */ |
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10 | } |
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11 | |
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12 | void owl_history_set_norepeats(owl_history *h) |
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13 | { |
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14 | h->repeats=0; |
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15 | } |
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16 | |
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17 | const char *owl_history_get_prev(owl_history *h) |
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18 | { |
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19 | |
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20 | if (!h) return NULL; |
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21 | h->touched=1; |
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22 | |
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23 | if (owl_list_get_size(&(h->hist))==0) return(NULL); |
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24 | |
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25 | if (h->cur == owl_list_get_size(&(h->hist))-1) { |
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26 | return(NULL); |
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27 | } |
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28 | |
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29 | h->cur++; |
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30 | |
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31 | return(owl_list_get_element(&(h->hist), h->cur)); |
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32 | } |
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33 | |
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34 | const char *owl_history_get_next(owl_history *h) |
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35 | { |
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36 | if (!h) return NULL; |
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37 | if (owl_list_get_size(&(h->hist))==0) return(NULL); |
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38 | if (h->cur==0) { |
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39 | return(NULL); |
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40 | } |
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41 | |
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42 | h->cur--; |
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43 | return(owl_list_get_element(&(h->hist), h->cur)); |
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44 | } |
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45 | |
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46 | void owl_history_store(owl_history *h, const char *line) |
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47 | { |
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48 | int size; |
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49 | |
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50 | if (!h) return; |
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51 | size=owl_list_get_size(&(h->hist)); |
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52 | |
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53 | /* if partial is set, remove the first entry first */ |
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54 | if (h->partial) { |
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55 | owl_free(owl_list_get_element(&(h->hist), 0)); |
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56 | owl_list_remove_element(&(h->hist), 0); |
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57 | } |
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58 | |
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59 | /* if repeats are disallowed, check if the line is the same as the last */ |
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60 | if (owl_list_get_size(&(h->hist))>0) { |
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61 | if (!strcmp(line, owl_list_get_element(&(h->hist), 0))) return; |
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62 | } |
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63 | |
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64 | /* if we've reached the max history size, pop off the last element */ |
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65 | if (size>OWL_HISTORYSIZE) { |
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66 | owl_free(owl_list_get_element(&(h->hist), size-1)); |
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67 | owl_list_remove_element(&(h->hist), size-1); |
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68 | } |
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69 | |
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70 | /* add the new line */ |
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71 | owl_list_prepend_element(&(h->hist), owl_strdup(line)); |
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72 | } |
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73 | |
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74 | void owl_history_set_partial(owl_history *h) |
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75 | { |
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76 | if (!h) return; |
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77 | h->partial=1; |
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78 | } |
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79 | |
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80 | void owl_history_reset(owl_history *h) |
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81 | { |
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82 | if (!h) return; |
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83 | h->cur=0; |
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84 | h->touched=0; |
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85 | h->partial=0; |
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86 | } |
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87 | |
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88 | int owl_history_is_touched(const owl_history *h) |
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89 | { |
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90 | if (!h) return(0); |
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91 | if (h->touched) return(1); |
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92 | return(0); |
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93 | } |
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