nsresult
nsTextControlFrame::OffsetToDOMPoint(PRInt32 aOffset,
nsIDOMNode** aResult,
PRInt32* aPosition)
{
NS_ENSURE_ARG_POINTER(aResult && aPosition);
*aResult = nsnull;
*aPosition = 0;
nsCOMPtr<nsIDOMElement> rootElement;
nsresult rv = GetRootNodeAndInitializeEditor(getter_AddRefs(rootElement));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> rootNode(do_QueryInterface(rootElement));
NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMNodeList> nodeList;
rv = rootNode->GetChildNodes(getter_AddRefs(nodeList));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(nodeList, NS_ERROR_FAILURE);
PRUint32 length = 0;
rv = nodeList->GetLength(&length);
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(length <= 2, "We should have one text node and one mozBR at most");
nsCOMPtr<nsIDOMNode> firstNode;
rv = nodeList->Item(0, getter_AddRefs(firstNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(firstNode);
if (length == 0 || aOffset < 0) {
NS_IF_ADDREF(*aResult = rootNode);
*aPosition = 0;
} else if (textNode) {
PRUint32 textLength = 0;
textNode->GetLength(&textLength);
if (length == 2 && PRUint32(aOffset) == textLength) {
// If we're at the end of the text node and we have a trailing BR node,
// set the selection on the BR node.
NS_IF_ADDREF(*aResult = rootNode);
*aPosition = 1;
} else {
// Otherwise, set the selection on the textnode itself.
NS_IF_ADDREF(*aResult = firstNode);
*aPosition = NS_MIN(aOffset, PRInt32(textLength));
}
} else {
NS_IF_ADDREF(*aResult = rootNode);
*aPosition = 0;
}
return NS_OK;
}
nsresult
nsTextControlFrame::DOMPointToOffset(nsIDOMNode* aNode,
PRInt32 aNodeOffset,
PRInt32* aResult)
{
NS_ENSURE_ARG_POINTER(aNode && aResult);
*aResult = 0;
nsCOMPtr<nsIDOMElement> rootElement;
nsresult rv = GetRootNodeAndInitializeEditor(getter_AddRefs(rootElement));
nsCOMPtr<nsIDOMNode> rootNode(do_QueryInterface(rootElement));
NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMNodeList> nodeList;
rv = rootNode->GetChildNodes(getter_AddRefs(nodeList));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(nodeList, NS_ERROR_FAILURE);
PRUint32 length = 0;
rv = nodeList->GetLength(&length);
NS_ENSURE_SUCCESS(rv, rv);
if (!length || aNodeOffset < 0)
return NS_OK;
NS_ASSERTION(length <= 2, "We should have one text node and one mozBR at most");
nsCOMPtr<nsIDOMNode> firstNode;
rv = nodeList->Item(0, getter_AddRefs(firstNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMText> textNode = do_QueryInterface(firstNode);
nsCOMPtr<nsIDOMText> nodeAsText = do_QueryInterface(aNode);
if (nodeAsText || (aNode == rootNode && aNodeOffset == 0)) {
// Selection is somewhere inside the text node; the offset is aNodeOffset
*aResult = aNodeOffset;
} else {
// Selection is on the mozBR node, so offset should be set to the length
// of the text node.
if (textNode) {
rv = textNode->GetLength(&length);
NS_ENSURE_SUCCESS(rv, rv);
*aResult = PRInt32(length);
}
}
return NS_OK;
}
nsresult
nsTextControlFrame::SelectAllOrCollapseToEndOfText(PRBool aSelect)
{
nsCOMPtr<nsIDOMElement> rootElement;
nsresult rv = GetRootNodeAndInitializeEditor(getter_AddRefs(rootElement));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIContent> rootContent = do_QueryInterface(rootElement);
nsCOMPtr<nsIDOMNode> rootNode(do_QueryInterface(rootElement));
NS_ENSURE_TRUE(rootNode && rootContent, NS_ERROR_FAILURE);
PRInt32 numChildren = rootContent->GetChildCount();
if (numChildren > 0) {
// We never want to place the selection after the last
// br under the root node!
nsIContent *child = rootContent->GetChildAt(numChildren - 1);
if (child) {
if (child->Tag() == nsGkAtoms::br)
--numChildren;
}
if (!aSelect && numChildren) {
child = rootContent->GetChildAt(numChildren - 1);
if (child && child->IsNodeOfType(nsINode::eTEXT)) {
rootNode = do_QueryInterface(child);
const nsTextFragment* fragment = child->GetText();
numChildren = fragment ? fragment->GetLength() : 0;
}
}
}
rv = SetSelectionInternal(rootNode, aSelect ? 0 : numChildren,
rootNode, numChildren);
NS_ENSURE_SUCCESS(rv, rv);
return ScrollSelectionIntoView();
}
