nsresult
nsCoreUtils::ScrollSubstringTo(nsIFrame* aFrame, nsRange* aRange,
nsIPresShell::ScrollAxis aVertical,
nsIPresShell::ScrollAxis aHorizontal)
{
if (!aFrame)
return NS_ERROR_FAILURE;
nsPresContext *presContext = aFrame->PresContext();
nsCOMPtr<nsISelectionController> selCon;
aFrame->GetSelectionController(presContext, getter_AddRefs(selCon));
NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
nsCOMPtr<nsISelection> selection;
selCon->GetSelection(nsISelectionController::SELECTION_ACCESSIBILITY,
getter_AddRefs(selection));
nsCOMPtr<nsISelectionPrivate> privSel(do_QueryInterface(selection));
selection->RemoveAllRanges();
selection->AddRange(aRange);
privSel->ScrollIntoViewInternal(
nsISelectionController::SELECTION_ANCHOR_REGION,
true, aVertical, aHorizontal);
selection->CollapseToStart();
return NS_OK;
}
nsresult
nsCoreUtils::ScrollSubstringTo(nsIFrame *aFrame,
nsIDOMNode *aStartNode, PRInt32 aStartIndex,
nsIDOMNode *aEndNode, PRInt32 aEndIndex,
PRInt16 aVPercent, PRInt16 aHPercent)
{
if (!aFrame || !aStartNode || !aEndNode)
return NS_ERROR_FAILURE;
nsPresContext *presContext = aFrame->PresContext();
nsRefPtr<nsIDOMRange> scrollToRange = new nsRange();
nsCOMPtr<nsISelectionController> selCon;
aFrame->GetSelectionController(presContext, getter_AddRefs(selCon));
NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
scrollToRange->SetStart(aStartNode, aStartIndex);
scrollToRange->SetEnd(aEndNode, aEndIndex);
nsCOMPtr<nsISelection> selection;
selCon->GetSelection(nsISelectionController::SELECTION_ACCESSIBILITY,
getter_AddRefs(selection));
nsCOMPtr<nsISelectionPrivate> privSel(do_QueryInterface(selection));
selection->RemoveAllRanges();
selection->AddRange(scrollToRange);
privSel->ScrollIntoView(nsISelectionController::SELECTION_ANCHOR_REGION,
true, aVPercent, aHPercent);
selection->CollapseToStart();
return NS_OK;
}
void
nsCaretAccessible::ProcessSelectionChanged(nsISelection* aSelection)
{
nsCOMPtr<nsISelectionPrivate> privSel(do_QueryInterface(aSelection));
PRInt16 type = 0;
privSel->GetType(&type);
if (type == nsISelectionController::SELECTION_NORMAL)
NormalSelectionChanged(aSelection);
else if (type == nsISelectionController::SELECTION_SPELLCHECK)
SpellcheckSelectionChanged(aSelection);
}
NS_IMETHODIMP
nsCaretAccessible::NotifySelectionChanged(nsIDOMDocument* aDOMDocument,
nsISelection* aSelection,
PRInt16 aReason)
{
NS_ENSURE_ARG(aDOMDocument);
NS_ENSURE_STATE(mRootAccessible);
nsCOMPtr<nsIDocument> documentNode(do_QueryInterface(aDOMDocument));
nsDocAccessible* document = GetAccService()->GetDocAccessible(documentNode);
#ifdef DEBUG_NOTIFICATIONS
nsCOMPtr<nsISelectionPrivate> privSel(do_QueryInterface(aSelection));
PRInt16 type = 0;
privSel->GetType(&type);
if (type == nsISelectionController::SELECTION_NORMAL ||
type == nsISelectionController::SELECTION_SPELLCHECK) {
bool isNormalSelection =
(type == nsISelectionController::SELECTION_NORMAL);
bool isIgnored = !document || !document->IsContentLoaded();
printf("\nSelection changed, selection type: %s, notification %s\n",
(isNormalSelection ? "normal" : "spellcheck"),
(isIgnored ? "ignored" : "pending"));
} else {
bool isIgnored = !document || !document->IsContentLoaded();
printf("\nSelection changed, selection type: unknown, notification %s\n",
(isIgnored ? "ignored" : "pending"));
}
#endif
// Don't fire events until document is loaded.
if (document && document->IsContentLoaded()) {
// The caret accessible has the same lifetime as the root accessible, and
// this outlives all its descendant document accessibles, so that we are
// guaranteed that the notification is processed before the caret accessible
// is destroyed.
document->HandleNotification<nsCaretAccessible, nsISelection>
(this, &nsCaretAccessible::ProcessSelectionChanged, aSelection);
}
return NS_OK;
}
