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/*
* prof_autocomplete.c
*
* Copyright (C) 2012 James Booth <boothj5@gmail.com>
*
* This file is part of Profanity.
*
* Profanity is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Profanity 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Profanity. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <string.h>
#include "prof_autocomplete.h"
struct p_autocomplete_t {
GSList *items;
GSList *last_found;
gchar *search_str;
};
static gchar * _search_from(PAutocomplete ac, GSList *curr);
PAutocomplete
p_autocomplete_new(void)
{
PAutocomplete new = malloc(sizeof(struct p_autocomplete_t));
new->items = NULL;
new->last_found = NULL;
new->search_str = NULL;
return new;
}
void
p_autocomplete_clear(PAutocomplete ac)
{
g_slist_free_full(ac->items, free);
ac->items = NULL;
p_autocomplete_reset(ac);
}
void
p_autocomplete_reset(PAutocomplete ac)
{
ac->last_found = NULL;
if (ac->search_str != NULL) {
free(ac->search_str);
ac->search_str = NULL;
}
}
gboolean
p_autocomplete_add(PAutocomplete ac, void *item)
{
if (ac->items == NULL) {
ac->items = g_slist_append(ac->items, item);
return TRUE;
} else {
GSList *curr = ac->items;
while(curr) {
// insert
if (g_strcmp0(curr->data, item) > 0) {
ac->items = g_slist_insert_before(ac->items,
curr, item);
return TRUE;
// update
} else if (g_strcmp0(curr->data, item) == 0) {
// only update if data different
if (strcmp(curr->data, item) != 0) {
free(curr->data);
curr->data = item;
return TRUE;
} else {
return FALSE;
}
}
curr = g_slist_next(curr);
}
// hit end, append
ac->items = g_slist_append(ac->items, item);
return TRUE;
}
}
gboolean
p_autocomplete_remove(PAutocomplete ac, const char * const item)
{
// reset last found if it points to the item to be removed
if (ac->last_found != NULL)
if (g_strcmp0(ac->last_found->data, item) == 0)
ac->last_found = NULL;
if (!ac->items) {
return FALSE;
} else {
GSList *curr = ac->items;
while(curr) {
if (g_strcmp0(curr->data, item) == 0) {
void *current_item = curr->data;
ac->items = g_slist_remove(ac->items, curr->data);
free(current_item);
return TRUE;
}
curr = g_slist_next(curr);
}
return FALSE;
}
}
GSList *
p_autocomplete_get_list(PAutocomplete ac)
{
GSList *copy = NULL;
GSList *curr = ac->items;
while(curr) {
copy = g_slist_append(copy, strdup(curr->data));
curr = g_slist_next(curr);
}
return copy;
}
gchar *
p_autocomplete_complete(PAutocomplete ac, gchar *search_str)
{
gchar *found = NULL;
// no items to search
if (!ac->items)
return NULL;
// first search attempt
if (ac->last_found == NULL) {
ac->search_str =
(gchar *) malloc((strlen(search_str) + 1) * sizeof(gchar));
strcpy(ac->search_str, search_str);
found = _search_from(ac, ac->items);
return found;
// subsequent search attempt
} else {
// search from here+1 tp end
found = _search_from(ac, g_slist_next(ac->last_found));
if (found != NULL)
return found;
// search from beginning
found = _search_from(ac, ac->items);
if (found != NULL)
return found;
// we found nothing, reset search
p_autocomplete_reset(ac);
return NULL;
}
}
static gchar *
_search_from(PAutocomplete ac, GSList *curr)
{
while(curr) {
// match found
if (strncmp(curr->data,
ac->search_str,
strlen(ac->search_str)) == 0) {
gchar *result =
(gchar *) malloc((strlen(curr->data) + 1) * sizeof(gchar));
// set pointer to last found
ac->last_found = curr;
// return the string, must be free'd by caller
strcpy(result, curr->data);
return result;
}
curr = g_slist_next(curr);
}
return NULL;
}
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