Listview S5
Dimitrie O. Paun
dpaun at rogers.com
Wed Oct 16 23:58:12 CDT 2002
Lots o'goodies
ChangeLog
Add ability to create an iterator over a range list
Fix memory leak when destroying ranges
Add function that will to a 'deep' clone of a range list
Add function that will subtract a range list from another
Do not crash on NULL ranges (similar in spirit to HDPAs)
Fancy deselection routines uses the above infrastructure
to deselect the minimum possible
Modify SetGroupSelection to take advantage of all this
new infrastructure, to avoid flicker on selection extension.
--- dlls/comctl32/listview.c.S4 Wed Oct 16 23:28:24 2002
+++ dlls/comctl32/listview.c Thu Oct 17 00:49:28 2002
@@ -881,6 +881,19 @@
return TRUE;
}
+
+/***
+ * Create an iterator over a bunch of ranges.
+ * Please note that the iterator will take ownership of the ranges,
+ * and will free them upon destruction.
+ */
+static inline BOOL iterator_ranges(ITERATOR* i, RANGES ranges)
+{
+ iterator_empty(i);
+ i->ranges = ranges;
+ return TRUE;
+}
+
/***
* Creates an iterator over the items which intersect lprc.
*/
@@ -2192,15 +2205,58 @@
static void ranges_destroy(RANGES ranges)
{
if (!ranges) return;
- DPA_Destroy(ranges->hdpa);
- ranges->hdpa = NULL;
+ if (ranges->hdpa)
+ {
+ INT i;
+
+ for(i = 0; i < ranges->hdpa->nItemCount; i++)
+ COMCTL32_Free(DPA_GetPtr(ranges->hdpa, i));
+ DPA_Destroy(ranges->hdpa);
+ ranges->hdpa = NULL;
+ }
COMCTL32_Free(ranges);
}
+static RANGES ranges_clone(RANGES ranges)
+{
+ RANGES clone;
+ INT i;
+
+ if (!ranges) return NULL;
+ clone = ranges_create(ranges->hdpa->nItemCount);
+ if (!clone) return NULL;
+
+ for (i = 0; i < ranges->hdpa->nItemCount; i++)
+ {
+ RANGE *newrng = (RANGE *)COMCTL32_Alloc(sizeof(RANGE));
+ if (!newrng)
+ {
+ ranges_destroy(clone);
+ return NULL;
+ }
+ *newrng = *((RANGE*)DPA_GetPtr(ranges->hdpa, i));
+ DPA_InsertPtr(clone->hdpa, i, newrng);
+ }
+ return clone;
+}
+
+static RANGES ranges_diff(RANGES ranges, RANGES sub)
+{
+ INT i;
+
+ if (!ranges || !sub) return ranges;
+
+ for (i = 0; i < sub->hdpa->nItemCount; i++)
+ ranges_del(ranges, *((RANGE *)DPA_GetPtr(sub->hdpa, i)));
+
+ return ranges;
+}
+
static void ranges_dump(RANGES ranges)
{
INT i;
+ if (!ranges) return;
for (i = 0; i < ranges->hdpa->nItemCount; i++)
TRACE(" %s\n", debugrange(DPA_GetPtr(ranges->hdpa, i)));
}
@@ -2210,6 +2266,7 @@
RANGE srchrng = { nItem, nItem + 1 };
TRACE("(nItem=%d)\n", nItem);
+ if (!ranges) return FALSE;
if (TRACE_ON(listview)) ranges_dump(ranges);
return DPA_Search(ranges->hdpa, &srchrng, 0, ranges_cmp, 0, DPAS_SORTED) != -1;
}
@@ -2218,6 +2275,7 @@
{
INT i, count = 0;
+ if (!ranges) return 0;
for (i = 0; i < ranges->hdpa->nItemCount; i++)
{
RANGE *sel = DPA_GetPtr(ranges->hdpa, i);
@@ -2232,6 +2290,7 @@
RANGE srchrng = { nItem, nItem + 1 }, *chkrng;
INT index;
+ if (!ranges) return FALSE;
index = DPA_Search(ranges->hdpa, &srchrng, 0, ranges_cmp, 0, DPAS_SORTED | DPAS_INSERTAFTER);
if (index == -1) return TRUE;
@@ -2252,6 +2311,7 @@
INT index;
TRACE("(%s)\n", debugrange(&range));
+ if (!ranges) return FALSE;
if (TRACE_ON(listview)) ranges_dump(ranges);
/* try find overlapping regions first */
@@ -2330,6 +2390,7 @@
INT index;
TRACE("(%s)\n", debugrange(&range));
+ if (!ranges) return FALSE;
remrgn = range;
do
@@ -2391,45 +2452,49 @@
*
* Parameters(s):
* [I] infoPtr : valid pointer to the listview structure
-* [I] nSkipItem : item to skip removing the selection
+* [I] toSkip : item range to skip removing the selection
*
* RETURNS:
* SUCCESS : TRUE
* FAILURE : TRUE
*/
-static LRESULT LISTVIEW_RemoveAllSelections(LISTVIEW_INFO *infoPtr, INT nSkipItem)
+static BOOL LISTVIEW_DeselectAllSkipItems(LISTVIEW_INFO *infoPtr, RANGES toSkip)
{
LVITEMW lvItem;
- RANGE *sel;
- INT i, pos;
- HDPA clone;
-
- if (infoPtr->bRemovingAllSelections) return TRUE;
-
- infoPtr->bRemovingAllSelections = TRUE;
+ ITERATOR i;
TRACE("()\n");
+ if (TRACE_ON(listview)) ranges_dump(toSkip);
lvItem.state = 0;
lvItem.stateMask = LVIS_SELECTED;
/* need to clone the DPA because callbacks can change it */
- clone = DPA_Clone(infoPtr->selectionRanges->hdpa, NULL);
- for ( pos = 0; (sel = DPA_GetPtr(clone, pos)); pos++ )
- {
- for(i = sel->lower; i <= sel->upper; i++)
- {
- if (i != nSkipItem)
- LISTVIEW_SetItemState(infoPtr, i, &lvItem);
- }
- }
- DPA_Destroy(clone);
+ iterator_ranges(&i, ranges_diff(ranges_clone(infoPtr->selectionRanges), toSkip));
+ while(iterator_next(&i))
+ LISTVIEW_SetItemState(infoPtr, i.nItem, &lvItem);
+ /* note that the iterator destructor will free the cloned range */
+ iterator_destroy(&i);
- infoPtr->bRemovingAllSelections = FALSE;
+ return TRUE;
+}
+static inline BOOL LISTVIEW_DeselectAllSkipItem(LISTVIEW_INFO *infoPtr, INT nItem)
+{
+ RANGES toSkip = ranges_create(1);
+
+ if (!toSkip) return FALSE;
+ ranges_additem(toSkip, nItem);
+ LISTVIEW_DeselectAllSkipItems(infoPtr, toSkip);
+ ranges_destroy(toSkip);
return TRUE;
}
+static inline BOOL LISTVIEW_DeselectAll(LISTVIEW_INFO *infoPtr)
+{
+ return LISTVIEW_DeselectAllSkipItem(infoPtr, -1);
+}
+
/***
* DESCRIPTION:
* Retrieves the number of items that are marked as selected.
@@ -2578,34 +2643,35 @@
static void LISTVIEW_SetGroupSelection(LISTVIEW_INFO *infoPtr, INT nItem)
{
UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
- INT i;
+ RANGES selection;
LVITEMW item;
- POINT ptItem;
- RECT rcSel;
+ ITERATOR i;
+
+ if (!(selection = ranges_create(100))) return;
- LISTVIEW_RemoveAllSelections(infoPtr, -1);
-
item.state = LVIS_SELECTED;
item.stateMask = LVIS_SELECTED;
if ((uView == LVS_LIST) || (uView == LVS_REPORT))
{
- INT nFirst, nLast;
-
if (infoPtr->nSelectionMark == -1)
- infoPtr->nSelectionMark = nFirst = nLast = nItem;
+ {
+ infoPtr->nSelectionMark = nItem;
+ ranges_additem(selection, nItem);
+ }
else
{
- nFirst = min(infoPtr->nSelectionMark, nItem);
- nLast = max(infoPtr->nSelectionMark, nItem);
+ RANGE sel;
+
+ sel.lower = min(infoPtr->nSelectionMark, nItem);
+ sel.upper = max(infoPtr->nSelectionMark, nItem) + 1;
+ ranges_add(selection, sel);
}
- for (i = nFirst; i <= nLast; i++)
- LISTVIEW_SetItemState(infoPtr, i, &item);
}
else
{
- RECT rcItem, rcSelMark;
- ITERATOR i;
+ RECT rcItem, rcSel, rcSelMark;
+ POINT ptItem;
rcItem.left = LVIR_BOUNDS;
if (!LISTVIEW_GetItemRect(infoPtr, nItem, &rcItem)) return;
@@ -2616,12 +2682,18 @@
while(iterator_next(&i))
{
LISTVIEW_GetItemPosition(infoPtr, i.nItem, &ptItem);
- if (PtInRect(&rcSel, ptItem))
- LISTVIEW_SetItemState(infoPtr, i.nItem, &item);
+ if (PtInRect(&rcSel, ptItem)) ranges_additem(selection, i.nItem);
}
iterator_destroy(&i);
}
+ LISTVIEW_DeselectAllSkipItems(infoPtr, selection);
+ iterator_ranges(&i, selection);
+ while(iterator_next(&i))
+ LISTVIEW_SetItemState(infoPtr, i.nItem, &item);
+ /* this will also destroy the selection */
+ iterator_destroy(&i);
+
LISTVIEW_SetItemFocus(infoPtr, nItem);
}
@@ -2642,7 +2714,7 @@
TRACE("nItem=%d\n", nItem);
- LISTVIEW_RemoveAllSelections(infoPtr, nItem);
+ LISTVIEW_DeselectAllSkipItem(infoPtr, nItem);
lvItem.state = LVIS_FOCUSED | LVIS_SELECTED;
lvItem.stateMask = LVIS_FOCUSED | LVIS_SELECTED;
@@ -2833,7 +2905,7 @@
{
if (lpLVItem->state & LVIS_SELECTED)
{
- if (lStyle & LVS_SINGLESEL) LISTVIEW_RemoveAllSelections(infoPtr, lpLVItem->iItem);
+ if (lStyle & LVS_SINGLESEL) LISTVIEW_DeselectAllSkipItem(infoPtr, lpLVItem->iItem);
ranges_additem(infoPtr->selectionRanges, lpLVItem->iItem);
}
else
@@ -2934,7 +3006,7 @@
lpItem->state |= (lpLVItem->state & lpLVItem->stateMask);
if (lpLVItem->state & lpLVItem->stateMask & ~infoPtr->uCallbackMask & LVIS_SELECTED)
{
- if (lStyle & LVS_SINGLESEL) LISTVIEW_RemoveAllSelections(infoPtr, lpLVItem->iItem);
+ if (lStyle & LVS_SINGLESEL) LISTVIEW_DeselectAllSkipItem(infoPtr, lpLVItem->iItem);
ranges_additem(infoPtr->selectionRanges, lpLVItem->iItem);
}
else if (lpLVItem->stateMask & LVIS_SELECTED)
@@ -3706,7 +3778,7 @@
TRACE("()\n");
- LISTVIEW_RemoveAllSelections(infoPtr, -1);
+ LISTVIEW_DeselectAll(infoPtr);
infoPtr->nSelectionMark=-1;
infoPtr->nFocusedItem=-1;
SetRectEmpty(&infoPtr->rcFocus);
@@ -6495,7 +6567,7 @@
: "",
(dwFlags & LVSICF_NOSCROLL) ? "LVSICF_NOSCROLL" : "");
- LISTVIEW_RemoveAllSelections(infoPtr, -1);
+ LISTVIEW_DeselectAll(infoPtr);
precount = infoPtr->nItemCount;
topvisible = LISTVIEW_GetTopIndex(infoPtr) +
@@ -7520,7 +7592,7 @@
else
{
/* remove all selections */
- LISTVIEW_RemoveAllSelections(infoPtr, -1);
+ LISTVIEW_DeselectAll(infoPtr);
}
return 0;
@@ -7786,7 +7858,7 @@
}
else
{
- LISTVIEW_RemoveAllSelections(infoPtr, -1);
+ LISTVIEW_DeselectAll(infoPtr);
}
return 0;
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