gecko-dev/layout/generic/nsSelection.cpp

104 lines
2.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsSelection.h"
#include "nsISelection.h"
NS_LAYOUT nsresult
NS_NewSelection(nsISelection** aInstancePtrResult)
{
static NS_DEFINE_IID(kISelectionIID, NS_ISELECTION_IID);
nsSelection * sel = new nsSelection();
return sel->QueryInterface(kISelectionIID, (void**) aInstancePtrResult);
}
nsresult nsSelection::QueryInterface(const nsIID& aIID,
void** aInstancePtrResult)
{
static NS_DEFINE_IID(kISelectionIID, NS_ISELECTION_IID);
NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kISelectionIID)) {
nsISelection* tmp = this;
*aInstancePtrResult = (void*) tmp;
NS_ADDREF_THIS();
return NS_OK;
}
return !NS_OK;
}
nsSelection::nsSelection() {
NS_INIT_REFCNT();
mRange = new nsSelectionRange();
}
nsSelection::~nsSelection() {
delete mRange;
}
NS_IMPL_ADDREF(nsSelection)
NS_IMPL_RELEASE(nsSelection)
/**
* Returns whether there is a valid selection
*/
PRBool nsSelection::IsValidSelection() {
return (PRBool)(mRange->GetStartContent() == nsnull ||
mRange->GetEndContent() == nsnull);
}
/**
* Clears the current selection (invalidates the selection)
*/
void nsSelection::ClearSelection() {
mRange->GetStartPoint()->SetPoint(nsnull, -1, PR_TRUE);
mRange->GetEndPoint()->SetPoint(nsnull, -1, PR_TRUE);
}
/**
* Copies the data from one nsSelectionPoint in the range to another,
* it does NOT just assign the pointers
*/
void nsSelection::SetRange(nsSelectionRange * aSelectionRange) {
mRange->SetRange(aSelectionRange->GetStartPoint(),
aSelectionRange->GetEndPoint());
}
/**
* Copies the data from one nsSelectionPoint in the range to another,
* it does NOT just assign the pointers
*/
void nsSelection::GetRange(nsSelectionRange * aSelectionRange) {
mRange->SetRange(aSelectionRange->GetStartPoint(),
aSelectionRange->GetEndPoint());
}
/**
* For debug only, it potentially leaks memory
*/
char * nsSelection::ToString() {
return mRange->ToString();;
}