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->partial = false; /* is the 0th element is partially composed? */ |
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8 | } |
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9 | |
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10 | const char *owl_history_get_prev(owl_history *h) |
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11 | { |
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12 | |
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13 | if (!h) return NULL; |
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14 | |
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15 | if (owl_list_get_size(&(h->hist))==0) return(NULL); |
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16 | |
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17 | if (h->cur == owl_list_get_size(&(h->hist))-1) { |
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18 | return(NULL); |
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19 | } |
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20 | |
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21 | h->cur++; |
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22 | |
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23 | return(owl_list_get_element(&(h->hist), h->cur)); |
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24 | } |
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25 | |
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26 | const char *owl_history_get_next(owl_history *h) |
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27 | { |
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28 | if (!h) return NULL; |
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29 | if (owl_list_get_size(&(h->hist))==0) return(NULL); |
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30 | if (h->cur==0) { |
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31 | return(NULL); |
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32 | } |
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33 | |
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34 | h->cur--; |
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35 | return(owl_list_get_element(&(h->hist), h->cur)); |
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36 | } |
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37 | |
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38 | void owl_history_store(owl_history *h, const char *line, bool partial) |
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39 | { |
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40 | int size; |
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41 | |
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42 | if (!h) return; |
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43 | size=owl_list_get_size(&(h->hist)); |
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44 | |
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45 | owl_history_reset(h); |
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46 | |
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47 | /* check if the line is the same as the last */ |
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48 | if (owl_list_get_size(&(h->hist))>0) { |
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49 | if (!strcmp(line, owl_list_get_element(&(h->hist), 0))) return; |
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50 | } |
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51 | |
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52 | /* if we've reached the max history size, pop off the last element */ |
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53 | if (size>OWL_HISTORYSIZE) { |
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54 | g_free(owl_list_get_element(&(h->hist), size-1)); |
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55 | owl_list_remove_element(&(h->hist), size-1); |
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56 | } |
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57 | |
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58 | /* add the new line */ |
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59 | owl_list_prepend_element(&(h->hist), g_strdup(line)); |
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60 | h->partial = partial; |
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61 | } |
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62 | |
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63 | void owl_history_reset(owl_history *h) |
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64 | { |
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65 | if (!h) return; |
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66 | |
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67 | /* if partial is set, remove the first entry first */ |
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68 | if (h->partial) { |
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69 | g_free(owl_list_get_element(&(h->hist), 0)); |
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70 | owl_list_remove_element(&(h->hist), 0); |
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71 | h->partial = false; |
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72 | } |
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73 | |
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74 | h->cur=0; |
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75 | } |
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76 | |
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77 | int owl_history_is_touched(const owl_history *h) |
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78 | { |
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79 | if (!h) return(0); |
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80 | return h->cur > 0; |
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81 | } |
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