gecko-dev/layout/base/nsFocusEventSuppressor.cpp

124 строки
3.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Olli Pettay <Olli.Pettay@helsinki.fi> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIFocusEventSuppressor.h"
#include "nsTArray.h"
class nsFocusEventSuppressorService : public nsIFocusEventSuppressorService
{
public:
NS_DECL_ISUPPORTS
virtual void AddObserverCallback(nsFocusEventSuppressorCallback aCallback)
{
NS_AddFocusSuppressorCallback(aCallback);
}
virtual void Suppress()
{
NS_SuppressFocusEvent();
}
virtual void Unsuppress()
{
NS_UnsuppressFocusEvent();
}
};
static nsTArray<nsFocusEventSuppressorCallback>* sCallbacks = nsnull;
static PRUint32 sFocusSuppressCount = 0;
NS_IMPL_ADDREF(nsFocusEventSuppressorService)
NS_IMPL_RELEASE(nsFocusEventSuppressorService)
NS_INTERFACE_MAP_BEGIN(nsFocusEventSuppressorService)
NS_INTERFACE_MAP_ENTRY(nsIFocusEventSuppressorService)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
void
NS_AddFocusSuppressorCallback(nsFocusEventSuppressorCallback aCallback)
{
if (aCallback) {
if (!sCallbacks) {
sCallbacks = new nsTArray<nsFocusEventSuppressorCallback>(2);
if (!sCallbacks) {
NS_WARNING("Out of memory!");
return;
}
} else if (sCallbacks->Contains(aCallback)) {
return;
}
sCallbacks->AppendElement(aCallback);
}
}
void
NS_SuppressFocusEvent()
{
++sFocusSuppressCount;
if (sFocusSuppressCount == 1 && sCallbacks) {
for (PRUint32 i = 0; i < sCallbacks->Length(); ++i) {
sCallbacks->ElementAt(i)(PR_TRUE);
}
}
}
void
NS_UnsuppressFocusEvent()
{
--sFocusSuppressCount;
if (sFocusSuppressCount == 0 && sCallbacks) {
for (PRUint32 i = 0; i < sCallbacks->Length(); ++i) {
sCallbacks->ElementAt(i)(PR_FALSE);
}
}
}
void
NS_ShutdownFocusSuppressor()
{
delete sCallbacks;
sCallbacks = nsnull;
}
nsresult
NS_NewFocusEventSuppressorService(nsIFocusEventSuppressorService** aResult)
{
nsIFocusEventSuppressorService* it = new nsFocusEventSuppressorService();
NS_ENSURE_TRUE(it, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aResult = it);
return NS_OK;
}