nsresult
TextEditRules::WillDeleteSelection(Selection* aSelection,
nsIEditor::EDirection aCollapsedAction,
bool* aCancel,
bool* aHandled)
{
if (!aSelection || !aCancel || !aHandled) {
return NS_ERROR_NULL_POINTER;
}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = false;
*aHandled = false;
// if there is only bogus content, cancel the operation
if (mBogusNode) {
*aCancel = true;
return NS_OK;
}
// If the current selection is empty (e.g the user presses backspace with
// a collapsed selection), then we want to avoid sending the selectstart
// event to the user, so we hide selection changes. However, we still
// want to send a single selectionchange event to the document, so we
// batch the selectionchange events, such that a single event fires after
// the AutoHideSelectionChanges destructor has been run.
SelectionBatcher selectionBatcher(aSelection);
AutoHideSelectionChanges hideSelection(aSelection);
nsAutoScriptBlocker scriptBlocker;
if (IsPasswordEditor()) {
NS_ENSURE_STATE(mTextEditor);
nsresult rv =
mTextEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
NS_ENSURE_SUCCESS(rv, rv);
// manage the password buffer
uint32_t start, end;
nsContentUtils::GetSelectionInTextControl(aSelection,
mTextEditor->GetRoot(),
start, end);
if (LookAndFeel::GetEchoPassword()) {
HideLastPWInput();
mLastStart = start;
mLastLength = 0;
if (mTimer) {
mTimer->Cancel();
}
}
// Collapsed selection.
if (end == start) {
// Deleting back.
if (nsIEditor::ePrevious == aCollapsedAction && start > 0) {
mPasswordText.Cut(start-1, 1);
}
// Deleting forward.
else if (nsIEditor::eNext == aCollapsedAction) {
mPasswordText.Cut(start, 1);
}
// Otherwise nothing to do for this collapsed selection.
}
// Extended selection.
else {
mPasswordText.Cut(start, end-start);
}
} else {
nsCOMPtr<nsIDOMNode> startNode;
int32_t startOffset;
nsresult rv =
EditorBase::GetStartNodeAndOffset(aSelection, getter_AddRefs(startNode),
&startOffset);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE);
bool bCollapsed;
rv = aSelection->GetIsCollapsed(&bCollapsed);
NS_ENSURE_SUCCESS(rv, rv);
if (!bCollapsed) {
return NS_OK;
}
// Test for distance between caret and text that will be deleted
rv = CheckBidiLevelForDeletion(aSelection, startNode, startOffset,
aCollapsedAction, aCancel);
NS_ENSURE_SUCCESS(rv, rv);
if (*aCancel) {
return NS_OK;
}
NS_ENSURE_STATE(mTextEditor);
rv = mTextEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ENSURE_STATE(mTextEditor);
nsresult rv =
mTextEditor->DeleteSelectionImpl(aCollapsedAction, nsIEditor::eStrip);
NS_ENSURE_SUCCESS(rv, rv);
*aHandled = true;
ASSERT_PASSWORD_LENGTHS_EQUAL()
return NS_OK;
}
nsresult
nsTextEditRules::WillDeleteSelection(nsISelection *aSelection,
nsIEditor::EDirection aCollapsedAction,
PRBool *aCancel,
PRBool *aHandled)
{
if (!aSelection || !aCancel || !aHandled) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
*aHandled = PR_FALSE;
// if there is only bogus content, cancel the operation
if (mBogusNode) {
*aCancel = PR_TRUE;
return NS_OK;
}
nsresult res = NS_OK;
if (IsPasswordEditor())
{
res = mEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
NS_ENSURE_SUCCESS(res, res);
// manage the password buffer
PRUint32 start, end;
mEditor->GetTextSelectionOffsets(aSelection, start, end);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<nsILookAndFeel> lookAndFeel = do_GetService(kLookAndFeelCID);
if (lookAndFeel->GetEchoPassword()) {
HideLastPWInput();
mLastStart = start;
mLastLength = 0;
if (mTimer)
{
mTimer->Cancel();
}
}
if (end == start)
{ // collapsed selection
if (nsIEditor::ePrevious==aCollapsedAction && 0<start) { // del back
mPasswordText.Cut(start-1, 1);
}
else if (nsIEditor::eNext==aCollapsedAction) { // del forward
mPasswordText.Cut(start, 1);
}
// otherwise nothing to do for this collapsed selection
}
else { // extended selection
mPasswordText.Cut(start, end-start);
}
}
else
{
nsCOMPtr<nsIDOMNode> startNode;
PRInt32 startOffset;
res = mEditor->GetStartNodeAndOffset(aSelection, getter_AddRefs(startNode), &startOffset);
NS_ENSURE_SUCCESS(res, res);
NS_ENSURE_TRUE(startNode, NS_ERROR_FAILURE);
PRBool bCollapsed;
res = aSelection->GetIsCollapsed(&bCollapsed);
NS_ENSURE_SUCCESS(res, res);
if (!bCollapsed)
return NS_OK;
// Test for distance between caret and text that will be deleted
res = CheckBidiLevelForDeletion(aSelection, startNode, startOffset, aCollapsedAction, aCancel);
NS_ENSURE_SUCCESS(res, res);
if (*aCancel) return NS_OK;
res = mEditor->ExtendSelectionForDelete(aSelection, &aCollapsedAction);
NS_ENSURE_SUCCESS(res, res);
}
res = mEditor->DeleteSelectionImpl(aCollapsedAction);
NS_ENSURE_SUCCESS(res, res);
*aHandled = PR_TRUE;
ASSERT_PASSWORD_LENGTHS_EQUAL()
return NS_OK;
}
