/*
* Finds the first child of aNode after child N and returns it. If a
* child is found, mCurrentNode is set to that child
* @param aNode Node to search for children
* @param childNum Child number to start search from. The child with
* this number is not searched
* @param aReversed Reverses search to find the last child instead
* of first
* @param aIndexPos Position of aNode in mPossibleIndexes
* @param _retval Returned node. Null if no child is found
* @returns Errorcode
*/
nsresult
nsTreeWalker::ChildOf(nsINode* aNode,
PRInt32 childNum,
PRBool aReversed,
PRInt32 aIndexPos,
nsINode** _retval)
{
PRInt16 filtered;
nsresult rv;
PRInt32 dir = aReversed ? -1 : 1;
// Step through all children
PRInt32 i = childNum;
while (1) {
i += dir;
nsCOMPtr<nsINode> child = aNode->GetChildAt(i);
if (!child) {
break;
}
rv = TestNode(child, &filtered);
NS_ENSURE_SUCCESS(rv, rv);
switch (filtered) {
case nsIDOMNodeFilter::FILTER_ACCEPT:
// Child found
mCurrentNode = child;
mPossibleIndexesPos = aIndexPos;
*_retval = child;
NS_ADDREF(*_retval);
SetChildIndex(aIndexPos, i);
return NS_OK;
case nsIDOMNodeFilter::FILTER_SKIP:
// Search children
rv = FirstChildOf(child, aReversed, aIndexPos+1, _retval);
NS_ENSURE_SUCCESS(rv, rv);
if (*_retval) {
SetChildIndex(aIndexPos, i);
return NS_OK;
}
break;
case nsIDOMNodeFilter::FILTER_REJECT:
// Keep searching
break;
default:
return NS_ERROR_UNEXPECTED;
}
}
*_retval = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::Deselect(void)
{
if (!mCurrentIndex)
return NS_OK;
nsresult rv = SetChildIndex(mCurrentIndex, PR_FALSE);
if (NS_SUCCEEDED(rv)) {
mCurrentIndex = 0;
}
return rv;
}
NS_IMETHODIMP
nsXFormsRepeatElement::Refresh()
{
#ifdef DEBUG_XF_REPEAT
printf("nsXFormsRepeatElement::Refresh()\n");
#endif
if (mAddingChildren || mIsParent)
return NS_OK;
nsPostRefresh postRefresh = nsPostRefresh();
PRUint32 oldIndex = mCurrentIndex;
/// @todo The spec says: "This node-set must consist of contiguous child
/// element nodes, with the same local name and namespace name of a common
/// parent node. The behavior of element repeat with respect to
/// non-homogeneous node-sets is undefined."
/// @see http://www.w3.org/TR/xforms/slice9.html#ui-repeat
///
/// Can/should we check this somehow? (XXX)
// Get the nodeset we are bound to
nsresult rv;
nsCOMPtr<nsIDOMXPathResult> result;
rv = ProcessNodeBinding(NS_LITERAL_STRING("nodeset"),
nsIDOMXPathResult::ORDERED_NODE_SNAPSHOT_TYPE,
getter_AddRefs(result));
NS_ENSURE_SUCCESS(rv, rv);
// Unroll the repeat rows
rv = UnrollRows(result);
NS_ENSURE_SUCCESS(rv, rv);
// Maintain the index
if (mCurrentIndex || !mMaxIndex) {
// Somebody might have been fooling around with our children since last
// refresh (either using delete or through script). Or we might have an
// empty nodeset. So fix the index value.
SanitizeIndex(&mCurrentIndex);
} else if (mMaxIndex) {
// repeat-index has not been initialized, set it.
if (!mParent) {
GetStartingIndex(&mCurrentIndex);
// Inform listeners of initial index value
IndexHasChanged();
} else if (mLevel > 1) {
// Set repeat-index for inner repeats. If parent <contextcontainer/>
// element is selected then mCurrentIndex is setted on starting index.
nsCOMPtr<nsIDOMNode> temp = mElement;
nsCOMPtr<nsIDOMNode> parent;
nsCOMPtr<nsIXFormsRepeatItemElement> context;
while (!context) {
rv = temp->GetParentNode(getter_AddRefs(parent));
NS_ENSURE_SUCCESS(rv, rv);
if (!parent)
break;
context = do_QueryInterface(parent);
temp.swap(parent);
}
if (context) {
PRBool hasIndex = PR_FALSE;
context->GetIndexState(&hasIndex);
if (hasIndex) {
PRUint32 index = 0;
GetStartingIndex(&index);
SetIndex(&index, PR_FALSE);
}
}
return NS_OK;
}
}
// If we have the repeat-index, set it.
if (mCurrentIndex) {
SetChildIndex(mCurrentIndex, PR_TRUE, PR_TRUE);
}
if (mCurrentIndex != oldIndex) {
mParent ? mParent->IndexHasChanged() : IndexHasChanged();
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::SetIndex(PRUint32 *aIndex,
PRBool aIsRefresh)
{
NS_ENSURE_ARG(aIndex);
#ifdef DEBUG_XF_REPEAT
printf("\tSetindex to %d (current: %d, max: %d), aIsRefresh=%d\n",
*aIndex, mCurrentIndex, mMaxIndex, aIsRefresh);
#endif
nsresult rv;
// Set repeat-index
if (mIsParent) {
NS_ASSERTION(mCurrentRepeat,
"How can we be a repeat parent without a child?");
// We're the parent of nested repeats, set through the correct repeat
return mCurrentRepeat->SetIndex(aIndex, aIsRefresh);
}
// Do nothing if we are not showing anything
if (mMaxIndex == 0) {
SanitizeIndex(aIndex, PR_TRUE);
mCurrentIndex = *aIndex;
return NS_OK;
}
if (aIsRefresh && !mCurrentIndex) {
// If we are refreshing, get existing index value from parent
NS_ASSERTION(mParent,
"SetIndex with aIsRefresh == PR_TRUE for a non-nested repeat?!");
rv = mParent->GetIndex(aIndex);
NS_ENSURE_SUCCESS(rv, rv);
}
// Check min. and max. value
SanitizeIndex(aIndex, PR_TRUE);
// Do nothing if setting to existing value
if (!aIsRefresh && mCurrentIndex && *aIndex == mCurrentIndex)
return NS_OK;
#ifdef DEBUG_XF_REPEAT
printf("\tWill set index to %d\n",
*aIndex);
#endif
// Set the repeat-index
rv = SetChildIndex(*aIndex, PR_TRUE, aIsRefresh);
NS_ENSURE_SUCCESS(rv, rv);
// Unset previous repeat-index
if (mCurrentIndex) {
// We had the previous selection, unset directly
SetChildIndex(mCurrentIndex, PR_FALSE, aIsRefresh);
}
if (mParent) {
// Selection is in another repeat, inform parent (it will inform the
// previous owner of its new state)
rv = mParent->SetCurrentRepeat(this, *aIndex);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set current index to new value
mCurrentIndex = *aIndex;
// Inform of index change
mParent ? mParent->IndexHasChanged() : IndexHasChanged();
return NS_OK;
}
