nsresult
nsContentEventHandler::GetFlatTextOffsetOfRange(nsIContent* aRootContent,
nsINode* aNode,
PRInt32 aNodeOffset,
PRUint32* aNativeOffset)
{
NS_ASSERTION(aNativeOffset, "param is invalid");
nsCOMPtr<nsIRange> prev = new nsRange();
NS_ENSURE_TRUE(prev, NS_ERROR_OUT_OF_MEMORY);
nsCOMPtr<nsIDOMRange> domPrev(do_QueryInterface(prev));
NS_ASSERTION(domPrev, "nsRange doesn't have nsIDOMRange??");
nsCOMPtr<nsIDOMNode> rootDOMNode(do_QueryInterface(aRootContent));
domPrev->SetStart(rootDOMNode, 0);
nsCOMPtr<nsIDOMNode> startDOMNode(do_QueryInterface(aNode));
NS_ASSERTION(startDOMNode, "startNode doesn't have nsIDOMNode");
domPrev->SetEnd(startDOMNode, aNodeOffset);
nsAutoString prevStr;
nsresult rv = GenerateFlatTextContent(prev, prevStr);
NS_ENSURE_SUCCESS(rv, rv);
*aNativeOffset = prevStr.Length();
return NS_OK;
}
nsresult
nsQueryContentEventHandler::OnQuerySelectedText(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(aEvent->mReply.mString.IsEmpty(),
"The reply string must be empty");
rv = GetFlatTextOffsetOfRange(mFirstSelectedRange, &aEvent->mReply.mOffset);
NS_ENSURE_SUCCESS(rv, rv);
PRBool isCollapsed;
rv = mSelection->GetIsCollapsed(&isCollapsed);
NS_ENSURE_SUCCESS(rv, rv);
if (!isCollapsed) {
nsCOMPtr<nsIDOMRange> domRange;
rv = mSelection->GetRangeAt(0, getter_AddRefs(domRange));
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(domRange, "GetRangeAt succeeded, but the result is null");
nsCOMPtr<nsIRange> range(do_QueryInterface(domRange));
NS_ENSURE_TRUE(range, NS_ERROR_FAILURE);
rv = GenerateFlatTextContent(range, aEvent->mReply.mString);
NS_ENSURE_SUCCESS(rv, rv);
}
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
nsresult
nsContentEventHandler::OnQuerySelectedText(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(aEvent->mReply.mString.IsEmpty(),
"The reply string must be empty");
rv = GetFlatTextOffsetOfRange(mRootContent,
mFirstSelectedRange, &aEvent->mReply.mOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> anchorDomNode, focusDomNode;
rv = mSelection->GetAnchorNode(getter_AddRefs(anchorDomNode));
NS_ENSURE_TRUE(anchorDomNode, NS_ERROR_FAILURE);
rv = mSelection->GetFocusNode(getter_AddRefs(focusDomNode));
NS_ENSURE_TRUE(focusDomNode, NS_ERROR_FAILURE);
PRInt32 anchorOffset, focusOffset;
rv = mSelection->GetAnchorOffset(&anchorOffset);
NS_ENSURE_SUCCESS(rv, rv);
rv = mSelection->GetFocusOffset(&focusOffset);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsINode> anchorNode(do_QueryInterface(anchorDomNode));
nsCOMPtr<nsINode> focusNode(do_QueryInterface(focusDomNode));
NS_ENSURE_TRUE(anchorNode && focusNode, NS_ERROR_UNEXPECTED);
PRInt16 compare = nsContentUtils::ComparePoints(anchorNode, anchorOffset,
focusNode, focusOffset);
aEvent->mReply.mReversed = compare > 0;
if (compare) {
nsCOMPtr<nsIRange> range = mFirstSelectedRange;
rv = GenerateFlatTextContent(range, aEvent->mReply.mString);
NS_ENSURE_SUCCESS(rv, rv);
}
aEvent->mSucceeded = PR_TRUE;
return NS_OK;
}
nsresult
nsContentEventHandler::OnQueryTextContent(nsQueryContentEvent* aEvent)
{
nsresult rv = Init(aEvent);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(aEvent->mReply.mString.IsEmpty(),
"The reply string must be empty");
nsRefPtr<nsRange> range = new nsRange();
rv = SetRangeFromFlatTextOffset(range, aEvent->mInput.mOffset,
aEvent->mInput.mLength, false);
NS_ENSURE_SUCCESS(rv, rv);
rv = GenerateFlatTextContent(range, aEvent->mReply.mString);
NS_ENSURE_SUCCESS(rv, rv);
aEvent->mSucceeded = true;
return NS_OK;
}
