gecko-dev/gfx/src/X11Util.cpp

89 lines
2.9 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* ***** 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/
*
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* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Code.
*
* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
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* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either 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
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* ***** END LICENSE BLOCK ***** */
#include "X11Util.h"
namespace mozilla {
ScopedXErrorHandler::ErrorEvent* ScopedXErrorHandler::sXErrorPtr;
int
ScopedXErrorHandler::ErrorHandler(Display *, XErrorEvent *ev)
{
// only record the error if no error was previously recorded.
// this means that in case of multiple errors, it's the first error that we report.
if (!sXErrorPtr->mError.error_code)
sXErrorPtr->mError = *ev;
return 0;
}
ScopedXErrorHandler::ScopedXErrorHandler()
{
// let sXErrorPtr point to this object's mXError object, but don't reset this mXError object!
// think of the case of nested ScopedXErrorHandler's.
mOldXErrorPtr = sXErrorPtr;
sXErrorPtr = &mXError;
mOldErrorHandler = XSetErrorHandler(ErrorHandler);
}
ScopedXErrorHandler::~ScopedXErrorHandler()
{
sXErrorPtr = mOldXErrorPtr;
XSetErrorHandler(mOldErrorHandler);
}
bool
ScopedXErrorHandler::SyncAndGetError(Display *dpy, XErrorEvent *ev)
{
XSync(dpy, False);
return GetError(ev);
}
bool
ScopedXErrorHandler::GetError(XErrorEvent *ev)
{
bool retval = mXError.mError.error_code != 0;
if (ev)
*ev = mXError.mError;
mXError = ErrorEvent(); // reset
return retval;
}
} // namespace mozilla