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Do not blindly trust GetItem to succeed -- check the return value, and 

fail gracefully.
This commit is contained in:
Dimitrie O. Paun 2002-10-04 17:51:42 +00:00 committed by Alexandre Julliard
parent 45387e3a6c
commit c1b1a296ff
1 changed files with 22 additions and 16 deletions
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38
dlls/comctl32/listview.c
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@ -289,7 +289,7 @@ static INT LISTVIEW_ProcessLetterKeys(LISTVIEW_INFO *, WPARAM, LPARAM);
static BOOL LISTVIEW_KeySelection(LISTVIEW_INFO *, INT); static BOOL LISTVIEW_KeySelection(LISTVIEW_INFO *, INT);
static LRESULT LISTVIEW_GetItemState(LISTVIEW_INFO *, INT, UINT); static LRESULT LISTVIEW_GetItemState(LISTVIEW_INFO *, INT, UINT);
static LRESULT LISTVIEW_SetItemState(LISTVIEW_INFO *, INT, LPLVITEMW); static LRESULT LISTVIEW_SetItemState(LISTVIEW_INFO *, INT, LPLVITEMW);
static void LISTVIEW_UpdateLargeItemLabelRect (LISTVIEW_INFO *, int, RECT*); static BOOL LISTVIEW_UpdateLargeItemLabelRect (LISTVIEW_INFO *, int, RECT*);
static LRESULT LISTVIEW_GetColumnT(LISTVIEW_INFO *, INT, LPLVCOLUMNW, BOOL); static LRESULT LISTVIEW_GetColumnT(LISTVIEW_INFO *, INT, LPLVCOLUMNW, BOOL);
static LRESULT LISTVIEW_VScroll(LISTVIEW_INFO *, INT, INT, HWND); static LRESULT LISTVIEW_VScroll(LISTVIEW_INFO *, INT, INT, HWND);
static LRESULT LISTVIEW_HScroll(LISTVIEW_INFO *, INT, INT, HWND); static LRESULT LISTVIEW_HScroll(LISTVIEW_INFO *, INT, INT, HWND);
@ -677,7 +677,7 @@ static BOOL notify_customdrawitem (LISTVIEW_INFO *infoPtr, HDC hdc, UINT iItem,
item.iItem = iItem; item.iItem = iItem;
item.iSubItem = 0; item.iSubItem = 0;
item.mask = LVIF_PARAM; item.mask = LVIF_PARAM;
LISTVIEW_GetItemT(infoPtr, &item, TRUE, TRUE); if (!LISTVIEW_GetItemT(infoPtr, &item, TRUE, TRUE)) return FALSE;
uItemState = 0; uItemState = 0;
@ -955,7 +955,7 @@ static INT LISTVIEW_ProcessLetterKeys(LISTVIEW_INFO *infoPtr, WPARAM charCode, L
item.iSubItem = 0; item.iSubItem = 0;
item.pszText = buffer; item.pszText = buffer;
item.cchTextMax = COUNTOF(buffer); item.cchTextMax = COUNTOF(buffer);
ListView_GetItemW(infoPtr->hwndSelf, &item); if (!LISTVIEW_GetItemW(infoPtr, &item, TRUE)) return 0;
/* check for a match */ /* check for a match */
if (lstrncmpiW(item.pszText,infoPtr->szSearchParam,infoPtr->nSearchParamLength) == 0) { if (lstrncmpiW(item.pszText,infoPtr->szSearchParam,infoPtr->nSearchParamLength) == 0) {
@ -1248,7 +1248,7 @@ static BOOL LISTVIEW_GetItemMeasures(LISTVIEW_INFO *infoPtr, INT nItem,
lvItem.mask = LVIF_INDENT; lvItem.mask = LVIF_INDENT;
lvItem.iItem = nItem; lvItem.iItem = nItem;
lvItem.iSubItem = 0; lvItem.iSubItem = 0;
LISTVIEW_GetItemW(infoPtr, &lvItem, TRUE); if (!LISTVIEW_GetItemW(infoPtr, &lvItem, TRUE)) return FALSE;
/* do indent */ /* do indent */
nIndent = infoPtr->iconSize.cx * lvItem.iIndent; nIndent = infoPtr->iconSize.cx * lvItem.iIndent;
@ -2985,9 +2985,10 @@ static inline BOOL LISTVIEW_FillBkgnd(LISTVIEW_INFO *infoPtr, HDC hdc, const REC
* [I] RECT * : clipping rectangle * [I] RECT * : clipping rectangle
* *
* RETURN: * RETURN:
* None * Success: TRUE
* Failure: FALSE
*/ */
static void LISTVIEW_DrawSubItem(LISTVIEW_INFO *infoPtr, HDC hdc, INT nItem, static BOOL LISTVIEW_DrawSubItem(LISTVIEW_INFO *infoPtr, HDC hdc, INT nItem,
INT nSubItem, RECT rcItem, UINT align) INT nSubItem, RECT rcItem, UINT align)
{ {
WCHAR szDispText[DISP_TEXT_SIZE]; WCHAR szDispText[DISP_TEXT_SIZE];
@ -3003,13 +3004,16 @@ static void LISTVIEW_DrawSubItem(LISTVIEW_INFO *infoPtr, HDC hdc, INT nItem,
lvItem.cchTextMax = COUNTOF(szDispText); lvItem.cchTextMax = COUNTOF(szDispText);
lvItem.pszText = szDispText; lvItem.pszText = szDispText;
*lvItem.pszText = '\0'; *lvItem.pszText = '\0';
LISTVIEW_GetItemW(infoPtr, &lvItem, TRUE); if (!LISTVIEW_GetItemW(infoPtr, &lvItem, TRUE)) return FALSE;
TRACE(" lvItem=%s\n", debuglvitem_t(&lvItem, TRUE)); TRACE(" lvItem=%s\n", debuglvitem_t(&lvItem, TRUE));
if (lvItem.iImage) FIXME("Draw the image for the subitem\n"); if (lvItem.iImage) FIXME("Draw the image for the subitem\n");
DrawTextW(hdc, lvItem.pszText, -1, &rcItem, DrawTextW(hdc, lvItem.pszText, -1, &rcItem,
DT_SINGLELINE | DT_VCENTER | DT_WORD_ELLIPSIS | align); DT_SINGLELINE | DT_VCENTER | DT_WORD_ELLIPSIS | align);
return TRUE;
} }
@ -3140,7 +3144,7 @@ static BOOL LISTVIEW_DrawLargeItem(LISTVIEW_INFO *infoPtr, HDC hdc, INT nItem, R
lvItem.cchTextMax = DISP_TEXT_SIZE; lvItem.cchTextMax = DISP_TEXT_SIZE;
lvItem.pszText = szDispText; lvItem.pszText = szDispText;
*lvItem.pszText = '\0'; *lvItem.pszText = '\0';
LISTVIEW_GetItemW(infoPtr, &lvItem, FALSE); if (!LISTVIEW_GetItemW(infoPtr, &lvItem, FALSE)) return FALSE;
TRACE(" lvItem=%s\n", debuglvitem_t(&lvItem, TRUE)); TRACE(" lvItem=%s\n", debuglvitem_t(&lvItem, TRUE));
/* now check if we need to update the focus rectangle */ /* now check if we need to update the focus rectangle */
@ -4170,7 +4174,7 @@ static BOOL LISTVIEW_EndEditLabelT(LISTVIEW_INFO *infoPtr, LPWSTR pszText, BOOL
item.iSubItem = 0; item.iSubItem = 0;
item.mask = LVIF_PARAM | LVIF_STATE; item.mask = LVIF_PARAM | LVIF_STATE;
item.stateMask = ~0; item.stateMask = ~0;
ListView_GetItemW(infoPtr->hwndSelf, &item); if (!LISTVIEW_GetItemW(infoPtr, &item, TRUE)) return FALSE;
lvItemRef.hdr.iImage = item.iImage; lvItemRef.hdr.iImage = item.iImage;
lvItemRef.state = item.state; lvItemRef.state = item.state;
lvItemRef.lParam = item.lParam; lvItemRef.lParam = item.lParam;
@ -4252,7 +4256,7 @@ static HWND LISTVIEW_EditLabelT(LISTVIEW_INFO *infoPtr, INT nItem, BOOL isW)
item.iSubItem = 0; item.iSubItem = 0;
item.mask = LVIF_PARAM | LVIF_STATE; item.mask = LVIF_PARAM | LVIF_STATE;
item.stateMask = ~0; item.stateMask = ~0;
ListView_GetItemW(infoPtr->hwndSelf, &item); if (!LISTVIEW_GetItemW(infoPtr, &item, TRUE)) return FALSE;
lvItemRef.hdr.iImage = item.iImage; lvItemRef.hdr.iImage = item.iImage;
lvItemRef.state = item.state; lvItemRef.state = item.state;
lvItemRef.lParam = item.lParam; lvItemRef.lParam = item.lParam;
@ -4266,7 +4270,7 @@ static HWND LISTVIEW_EditLabelT(LISTVIEW_INFO *infoPtr, INT nItem, BOOL isW)
lvItem.cchTextMax = DISP_TEXT_SIZE; lvItem.cchTextMax = DISP_TEXT_SIZE;
lvItem.pszText = szDispText; lvItem.pszText = szDispText;
*lvItem.pszText = '\0'; *lvItem.pszText = '\0';
LISTVIEW_GetItemT(infoPtr, &lvItem, FALSE, isW); if (!LISTVIEW_GetItemT(infoPtr, &lvItem, FALSE, isW)) return FALSE;
ZeroMemory(&dispInfo, sizeof(dispInfo)); ZeroMemory(&dispInfo, sizeof(dispInfo));
dispInfo.item.mask = 0; dispInfo.item.mask = 0;
@ -5098,7 +5102,7 @@ static void LISTVIEW_GetIntegralLines(
* *
* This appears to be weird, even in the Microsoft implementation. * This appears to be weird, even in the Microsoft implementation.
*/ */
static void LISTVIEW_UpdateLargeItemLabelRect (LISTVIEW_INFO *infoPtr, int nItem, RECT *rect) static BOOL LISTVIEW_UpdateLargeItemLabelRect (LISTVIEW_INFO *infoPtr, int nItem, RECT *rect)
{ {
HDC hdc = GetDC (infoPtr->hwndSelf); HDC hdc = GetDC (infoPtr->hwndSelf);
HFONT hOldFont = SelectObject (hdc, infoPtr->hFont); HFONT hOldFont = SelectObject (hdc, infoPtr->hFont);
@ -5134,9 +5138,9 @@ static void LISTVIEW_UpdateLargeItemLabelRect (LISTVIEW_INFO *infoPtr, int nItem
lvItem.iSubItem = 0; lvItem.iSubItem = 0;
/* We will specify INTERNAL and so will receive back a const /* We will specify INTERNAL and so will receive back a const
* pointer to the text, rather than specifying a buffer to which * pointer to the text, rather than specifying a buffer to which
* to copy it. * to copy it. FIXME: what about OWNERDRAW???
*/ */
LISTVIEW_GetItemW (infoPtr, &lvItem, TRUE); if (!LISTVIEW_GetItemW(infoPtr, &lvItem, TRUE)) return FALSE;
InflateRect(&rcText, -2, 0); InflateRect(&rcText, -2, 0);
DrawTextW (hdc, lvItem.pszText, -1, &rcText, uFormat); DrawTextW (hdc, lvItem.pszText, -1, &rcText, uFormat);
@ -5169,6 +5173,8 @@ static void LISTVIEW_UpdateLargeItemLabelRect (LISTVIEW_INFO *infoPtr, int nItem
SelectObject (hdc, hOldFont); SelectObject (hdc, hOldFont);
ReleaseDC (infoPtr->hwndSelf, hdc); ReleaseDC (infoPtr->hwndSelf, hdc);
return TRUE;
} }
/*** /***
@ -6450,7 +6456,7 @@ static LRESULT LISTVIEW_SetColumnWidth(LISTVIEW_INFO *infoPtr, INT iCol, INT cx)
for(item_index = 0; item_index < GETITEMCOUNT(infoPtr); item_index++) for(item_index = 0; item_index < GETITEMCOUNT(infoPtr); item_index++)
{ {
lvItem.iItem = item_index; lvItem.iItem = item_index;
LISTVIEW_GetItemT(infoPtr, &lvItem, FALSE, TRUE); if (!LISTVIEW_GetItemT(infoPtr, &lvItem, FALSE, TRUE)) continue;
nLabelWidth = LISTVIEW_GetStringWidthT(infoPtr, lvItem.pszText, TRUE); nLabelWidth = LISTVIEW_GetStringWidthT(infoPtr, lvItem.pszText, TRUE);
cx = (nLabelWidth>cx)?nLabelWidth:cx; cx = (nLabelWidth>cx)?nLabelWidth:cx;
} }
@ -6514,7 +6520,7 @@ static LRESULT LISTVIEW_SetColumnWidth(LISTVIEW_INFO *infoPtr, INT iCol, INT cx)
for(item_index = 0; item_index < GETITEMCOUNT(infoPtr); item_index++) for(item_index = 0; item_index < GETITEMCOUNT(infoPtr); item_index++)
{ {
lvItem.iItem = item_index; lvItem.iItem = item_index;
LISTVIEW_GetItemT(infoPtr, &lvItem, FALSE, TRUE); if (!LISTVIEW_GetItemT(infoPtr, &lvItem, FALSE, TRUE)) continue;
nLabelWidth = LISTVIEW_GetStringWidthT(infoPtr, lvItem.pszText, TRUE); nLabelWidth = LISTVIEW_GetStringWidthT(infoPtr, lvItem.pszText, TRUE);
nLabelWidth += TRAILING_PADDING; nLabelWidth += TRAILING_PADDING;
/* While it is possible for subitems to have icons, even MS messes /* While it is possible for subitems to have icons, even MS messes