NS_IMETHODIMP nsTreeSelection::ToggleSelect(PRInt32 aIndex)
{
// There are six cases that can occur on a ToggleSelect with our
// range code.
// (1) A new range should be made for a selection.
// (2) A single range is removed from the selection.
// (3) The item is added to an existing range.
// (4) The item is removed from an existing range.
// (5) The addition of the item causes two ranges to be merged.
// (6) The removal of the item causes two ranges to be split.
mShiftSelectPivot = -1;
SetCurrentIndex(aIndex);
nsresult rv = NS_OK;
if (!mFirstRange)
Select(aIndex);
else {
if (!mFirstRange->Contains(aIndex)) {
PRBool single;
GetSingle(&single);
if (!single)
rv = mFirstRange->Add(aIndex);
}
else
rv = mFirstRange->Remove(aIndex);
if (NS_SUCCEEDED(rv)) {
mTree->InvalidateRow(aIndex);
FireOnSelectHandler();
}
}
return rv;
}
NS_IMETHODIMP nsTreeSelection::RangedSelect(PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aAugment)
{
PRBool single;
nsresult rv = GetSingle(&single);
if (NS_FAILED(rv))
return rv;
if ((mFirstRange || (aStartIndex != aEndIndex)) && single)
return NS_OK;
if (!aAugment) {
// Clear our selection.
if (mFirstRange) {
mFirstRange->Invalidate();
delete mFirstRange;
mFirstRange = nsnull;
}
}
if (aStartIndex == -1) {
if (mShiftSelectPivot != -1)
aStartIndex = mShiftSelectPivot;
else if (mCurrentIndex != -1)
aStartIndex = mCurrentIndex;
else
aStartIndex = aEndIndex;
}
mShiftSelectPivot = aStartIndex;
rv = SetCurrentIndex(aEndIndex);
if (NS_FAILED(rv))
return rv;
PRInt32 start = aStartIndex < aEndIndex ? aStartIndex : aEndIndex;
PRInt32 end = aStartIndex < aEndIndex ? aEndIndex : aStartIndex;
if (aAugment && mFirstRange) {
// We need to remove all the items within our selected range from the selection,
// and then we insert our new range into the list.
nsresult rv = mFirstRange->RemoveRange(start, end);
if (NS_FAILED(rv))
return rv;
}
nsTreeRange* range = new nsTreeRange(this, start, end);
if (!range)
return NS_ERROR_OUT_OF_MEMORY;
range->Invalidate();
if (aAugment && mFirstRange)
mFirstRange->Insert(range);
else
mFirstRange = range;
FireOnSelectHandler();
return NS_OK;
}
NS_IMETHODIMP nsTreeSelection::ClearRange(PRInt32 aStartIndex, PRInt32 aEndIndex)
{
SetCurrentIndex(aEndIndex);
if (mFirstRange) {
PRInt32 start = aStartIndex < aEndIndex ? aStartIndex : aEndIndex;
PRInt32 end = aStartIndex < aEndIndex ? aEndIndex : aStartIndex;
mFirstRange->RemoveRange(start, end);
mTree->InvalidateRange(start, end);
}
return NS_OK;
}
NS_IMETHODIMP nsTreeSelection::ClearRange(int32_t aStartIndex, int32_t aEndIndex)
{
nsresult rv = SetCurrentIndex(aEndIndex);
if (NS_FAILED(rv))
return rv;
if (mFirstRange) {
int32_t start = aStartIndex < aEndIndex ? aStartIndex : aEndIndex;
int32_t end = aStartIndex < aEndIndex ? aEndIndex : aStartIndex;
mFirstRange->RemoveRange(start, end);
if (mTree)
mTree->InvalidateRange(start, end);
}
return NS_OK;
}
NS_IMETHODIMP nsTreeSelection::Select(PRInt32 aIndex)
{
mShiftSelectPivot = -1;
nsresult rv = SetCurrentIndex(aIndex);
if (NS_FAILED(rv))
return rv;
if (mFirstRange) {
PRBool alreadySelected = mFirstRange->Contains(aIndex);
if (alreadySelected) {
PRInt32 count = mFirstRange->Count();
if (count > 1) {
// We need to deselect everything but our item.
mFirstRange->RemoveAllBut(aIndex);
FireOnSelectHandler();
}
return NS_OK;
}
else {
// Clear out our selection.
mFirstRange->Invalidate();
delete mFirstRange;
}
}
// Create our new selection.
mFirstRange = new nsTreeRange(this, aIndex);
if (!mFirstRange)
return NS_ERROR_OUT_OF_MEMORY;
mFirstRange->Invalidate();
// Fire the select event
FireOnSelectHandler();
return NS_OK;
}