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comctl32/listbox: Use a helper to expand the item array. 

Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Gabriel Ivăncescu 2019-02-07 15:12:21 +02:00 committed by Alexandre Julliard
parent 98ece04660
commit 3afbda2ae2
1 changed files with 25 additions and 39 deletions
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64
dlls/comctl32/listbox.c
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@ -36,12 +36,13 @@
#include "wine/unicode.h"
#include "wine/exception.h"
#include "wine/debug.h"
#include "wine/heap.h"
#include "comctl32.h"
WINE_DEFAULT_DEBUG_CHANNEL(listbox);
/* Items array granularity */
/* Items array granularity (must be power of 2) */
#define LB_ARRAY_GRANULARITY 16
/* Scrolling timeout in ms */
@ -126,6 +127,26 @@ static TIMER_DIRECTION LISTBOX_Timer = LB_TIMER_NONE;
static LRESULT LISTBOX_GetItemRect( const LB_DESCR *descr, INT index, RECT *rect );
static BOOL resize_storage(LB_DESCR *descr, UINT items_size)
{
LB_ITEMDATA *items;
if (items_size > descr->items_size ||
items_size + LB_ARRAY_GRANULARITY * 2 < descr->items_size)
{
items_size = (items_size + LB_ARRAY_GRANULARITY - 1) & ~(LB_ARRAY_GRANULARITY - 1);
items = heap_realloc(descr->items, items_size * sizeof(LB_ITEMDATA));
if (!items)
{
SEND_NOTIFICATION(descr, LBN_ERRSPACE);
return FALSE;
}
descr->items_size = items_size;
descr->items = items;
}
return TRUE;
}
static BOOL is_item_selected( const LB_DESCR *descr, UINT index )
{
return descr->items[index].selected;
@ -684,27 +705,10 @@ static void LISTBOX_DrawFocusRect( LB_DESCR *descr, BOOL on )
*/
static LRESULT LISTBOX_InitStorage( LB_DESCR *descr, INT nb_items )
{
LB_ITEMDATA *item;
UINT new_size = descr->nb_items + nb_items;
nb_items += LB_ARRAY_GRANULARITY - 1;
nb_items -= (nb_items % LB_ARRAY_GRANULARITY);
if (descr->items) {
nb_items += descr->items_size;
item = HeapReAlloc( GetProcessHeap(), 0, descr->items,
nb_items * sizeof(LB_ITEMDATA));
}
else {
item = HeapAlloc( GetProcessHeap(), 0,
nb_items * sizeof(LB_ITEMDATA));
}
if (!item)
{
SEND_NOTIFICATION( descr, LBN_ERRSPACE );
if (new_size > descr->items_size && !resize_storage(descr, new_size))
return LB_ERRSPACE;
}
descr->items_size = nb_items;
descr->items = item;
return LB_OKAY;
}
@ -1525,29 +1529,11 @@ static LRESULT LISTBOX_InsertItem( LB_DESCR *descr, INT index,
LPWSTR str, ULONG_PTR data )
{
LB_ITEMDATA *item;
INT max_items;
INT oldfocus = descr->focus_item;
if (index == -1) index = descr->nb_items;
else if ((index < 0) || (index > descr->nb_items)) return LB_ERR;
if (descr->nb_items == descr->items_size)
{
/* We need to grow the array */
max_items = descr->items_size + LB_ARRAY_GRANULARITY;
if (descr->items)
item = HeapReAlloc( GetProcessHeap(), 0, descr->items,
max_items * sizeof(LB_ITEMDATA) );
else
item = HeapAlloc( GetProcessHeap(), 0,
max_items * sizeof(LB_ITEMDATA) );
if (!item)
{
SEND_NOTIFICATION( descr, LBN_ERRSPACE );
return LB_ERRSPACE;
}
descr->items_size = max_items;
descr->items = item;
}
if (!resize_storage(descr, descr->nb_items + 1)) return LB_ERR;
/* Insert the item structure */