NS_IMETHODIMP
nsAccessiblePivot::SetTextRange(nsIAccessibleText* aTextAccessible,
int32_t aStartOffset, int32_t aEndOffset,
bool aIsFromUserInput, uint8_t aArgc)
{
NS_ENSURE_ARG(aTextAccessible);
// Check that start offset is smaller than end offset, and that if a value is
// smaller than 0, both should be -1.
NS_ENSURE_TRUE(aStartOffset <= aEndOffset &&
(aStartOffset >= 0 || (aStartOffset != -1 && aEndOffset != -1)),
NS_ERROR_INVALID_ARG);
nsCOMPtr<nsIAccessible> xpcAcc = do_QueryInterface(aTextAccessible);
NS_ENSURE_ARG(xpcAcc);
RefPtr<Accessible> acc = xpcAcc->ToInternalAccessible();
NS_ENSURE_ARG(acc);
HyperTextAccessible* position = acc->AsHyperText();
if (!position || !IsDescendantOf(position, GetActiveRoot()))
return NS_ERROR_INVALID_ARG;
// Make sure the given offsets don't exceed the character count.
if (aEndOffset > static_cast<int32_t>(position->CharacterCount()))
return NS_ERROR_FAILURE;
int32_t oldStart = mStartOffset, oldEnd = mEndOffset;
mStartOffset = aStartOffset;
mEndOffset = aEndOffset;
mPosition.swap(acc);
NotifyOfPivotChange(acc, oldStart, oldEnd,
nsIAccessiblePivot::REASON_TEXT,
(aArgc > 0) ? aIsFromUserInput : true);
return NS_OK;
}
