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#include "internal.h"
#include <stdlib.h>
#include <assert.h>
#include <string.h>
/**
* Shrink bmItem** list pointer.
*
* Useful helper function for filter functions.
*
* @param list Pointer to pointer to list of bmItem pointers.
* @param osize Current size of the list.
* @param nsize New size the list will be shrinked to.
* @return Pointer to list of bmItem pointers.
*/
static bmItem** _bmFilterShrinkList(bmItem ***inOutList, size_t osize, size_t nsize)
{
assert(inOutList);
if (nsize == 0) {
free(*inOutList);
return (*inOutList = NULL);
}
if (nsize >= osize)
return *inOutList;
void *tmp = malloc(sizeof(bmItem*) * nsize);
if (!tmp)
return *inOutList;
memcpy(tmp, *inOutList, sizeof(bmItem*) * nsize);
free(*inOutList);
return (*inOutList = tmp);
}
/**
* Text filter tokenizer helper.
*
* @param menu bmMenu instance which filter to tokenize.
* @param outTokv char pointer reference to list of tokens, this should be freed after use.
* @param outTokc unsigned int reference to number of tokens.
* @return Pointer to buffer that contains tokenized string, this should be freed after use.
*/
static char* _bmFilterTokenize(bmMenu *menu, char ***outTokv, unsigned int *outTokc)
{
assert(menu);
assert(outTokv);
assert(outTokc);
*outTokv = NULL;
*outTokc = 0;
char **tokv = NULL, *buffer = NULL;
if (!(buffer = _bmStrdup(menu->filter)))
goto fail;
char *s;
for (s = buffer; *s && *s == ' '; ++s);
char **tmp = NULL;
size_t pos = 0, next;
unsigned int tokc = 0, tokn = 0;
for (; (pos = _bmStripToken(s, " ", &next)) > 0; tokv = tmp) {
if (++tokc > tokn && !(tmp = realloc(tokv, ++tokn * sizeof(char*))))
goto fail;
tmp[tokc - 1] = s;
s += next;
}
*outTokv = tmp;
*outTokc = tokc;
return buffer;
fail:
if (buffer)
free(buffer);
if (tokv)
free(tokv);
return NULL;
}
/**
* Dmenu filterer that accepts substring function.
*
* @param menu bmMenu instance to filter.
* @param addition This will be 1, if filter is same as previous filter with something appended.
* @param fstrstr Substring function used to match items.
* @param outNmemb unsigned int reference to filtered items outNmemb.
* @return Pointer to array of bmItem pointers.
*/
bmItem** _bmFilterDmenuFun(bmMenu *menu, char addition, char* (*fstrstr)(const char *a, const char *b), int (*fstrncmp)(const char *a, const char *b, size_t len), unsigned int *outNmemb)
{
assert(menu);
assert(fstrstr);
assert(fstrncmp);
assert(outNmemb);
*outNmemb = 0;
unsigned int itemsCount;
bmItem **items;
if (addition) {
items = bmMenuGetFilteredItems(menu, &itemsCount);
} else {
items = bmMenuGetItems(menu, &itemsCount);
}
char *buffer = NULL;
bmItem **filtered = calloc(itemsCount, sizeof(bmItem*));
if (!filtered)
goto fail;
char **tokv;
unsigned int tokc;
if (!(buffer = _bmFilterTokenize(menu, &tokv, &tokc)))
goto fail;
size_t len = (tokc ? strlen(tokv[0]) : 0);
unsigned int i, f, e;
for (e = f = i = 0; i < itemsCount; ++i) {
bmItem *item = items[i];
if (!item->text && tokc != 0)
continue;
if (tokc && item->text) {
unsigned int t;
for (t = 0; t < tokc && fstrstr(item->text, tokv[t]); ++t);
if (t < tokc)
continue;
}
if (tokc && item->text && !fstrncmp(tokv[0], item->text, len + 1)) { /* exact matches */
memmove(&filtered[1], filtered, f * sizeof(bmItem*));
filtered[0] = item;
e++; /* where do exact matches end */
} else if (tokc && item->text && !fstrncmp(tokv[0], item->text, len)) { /* prefixes */
memmove(&filtered[e + 1], &filtered[e], (f - e) * sizeof(bmItem*));
filtered[e] = item;
e++; /* where do exact matches end */
} else {
filtered[f] = item;
}
f++; /* where do all matches end */
}
if (buffer)
free(buffer);
if (tokv)
free(tokv);
return _bmFilterShrinkList(&filtered, menu->items.count, (*outNmemb = f));
fail:
if (filtered)
free(filtered);
if (buffer)
free(buffer);
return NULL;
}
/**
* Filter that mimics the vanilla dmenu filtering.
*
* @param menu bmMenu instance to filter.
* @param addition This will be 1, if filter is same as previous filter with something appended.
* @param outNmemb unsigned int reference to filtered items outNmemb.
* @return Pointer to array of bmItem pointers.
*/
bmItem** _bmFilterDmenu(bmMenu *menu, char addition, unsigned int *outNmemb)
{
return _bmFilterDmenuFun(menu, addition, strstr, strncmp, outNmemb);
}
/**
* Filter that mimics the vanilla case-insensitive dmenu filtering.
*
* @param menu bmMenu instance to filter.
* @param addition This will be 1, if filter is same as previous filter with something appended.
* @param outNmemb unsigned int reference to filtered items outNmemb.
* @return Pointer to array of bmItem pointers.
*/
bmItem** _bmFilterDmenuCaseInsensitive(bmMenu *menu, char addition, unsigned int *outNmemb)
{
return _bmFilterDmenuFun(menu, addition, _bmStrupstr, _bmStrnupcmp, outNmemb);
}
/* vim: set ts=8 sw=4 tw=0 :*/
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