/usr/include/firefox/mozilla/X11Util.h is in firefox-dev 11.0+build1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | /* -*- 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/
*
* 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 Code.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* 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
* 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 ***** */
#ifndef mozilla_X11Util_h
#define mozilla_X11Util_h
// Utilities common to all X clients, regardless of UI toolkit.
#if defined(MOZ_WIDGET_GTK2)
# include <gdk/gdkx.h>
#elif defined(MOZ_WIDGET_QT)
// X11/X.h has #define CursorShape 0, but Qt's qnamespace.h defines
// enum CursorShape { ... }. Good times!
#undef CursorShape
# include <QX11Info>
# include <X11/Xlib.h>
#else
# error Unknown toolkit
#endif
#include "gfxCore.h"
#include "nsDebug.h"
namespace mozilla {
/**
* Return the default X Display created and used by the UI toolkit.
*/
inline Display*
DefaultXDisplay()
{
#if defined(MOZ_WIDGET_GTK2)
return GDK_DISPLAY();
#elif defined(MOZ_WIDGET_QT)
return QX11Info::display();
#endif
}
/**
* Invoke XFree() on a pointer to memory allocated by Xlib (if the
* pointer is nonnull) when this class goes out of scope.
*/
template<typename T>
struct ScopedXFree
{
ScopedXFree() : mPtr(NULL) {}
ScopedXFree(T* aPtr) : mPtr(aPtr) {}
~ScopedXFree() { Assign(NULL); }
ScopedXFree& operator=(T* aPtr) { Assign(aPtr); return *this; }
operator T*() const { return get(); }
T* operator->() const { return get(); }
T* get() const { return mPtr; }
private:
void Assign(T* aPtr)
{
NS_ASSERTION(!mPtr || mPtr != aPtr, "double-XFree() imminent");
if (mPtr)
XFree(mPtr);
mPtr = aPtr;
}
T* mPtr;
// disable these
ScopedXFree(const ScopedXFree&);
ScopedXFree& operator=(const ScopedXFree&);
static void* operator new (size_t);
static void operator delete (void*);
};
/**
* On construction, set a graceful X error handler that doesn't crash the application and records X errors.
* On destruction, restore the X error handler to what it was before construction.
*
* The SyncAndGetError() method allows to know whether a X error occurred, optionally allows to get the full XErrorEvent,
* and resets the recorded X error state so that a single X error will be reported only once.
*
* Nesting is correctly handled: multiple nested ScopedXErrorHandler's don't interfere with each other's state. However,
* if SyncAndGetError is not called on the nested ScopedXErrorHandler, then any X errors caused by X calls made while the nested
* ScopedXErrorHandler was in place may then be caught by the other ScopedXErrorHandler. This is just a result of X being
* asynchronous and us not doing any implicit syncing: the only method in this class what causes syncing is SyncAndGetError().
*
* This class is not thread-safe at all. It is assumed that only one thread is using any ScopedXErrorHandler's. Given that it's
* not used on Mac, it should be easy to make it thread-safe by using thread-local storage with __thread.
*/
class NS_GFX ScopedXErrorHandler
{
public:
// trivial wrapper around XErrorEvent, just adding ctor initializing by zero.
struct ErrorEvent
{
XErrorEvent mError;
ErrorEvent()
{
memset(this, 0, sizeof(ErrorEvent));
}
};
private:
// this ScopedXErrorHandler's ErrorEvent object
ErrorEvent mXError;
// static pointer for use by the error handler
static ErrorEvent* sXErrorPtr;
// what to restore sXErrorPtr to on destruction
ErrorEvent* mOldXErrorPtr;
// what to restore the error handler to on destruction
int (*mOldErrorHandler)(Display *, XErrorEvent *);
public:
static int
ErrorHandler(Display *, XErrorEvent *ev);
ScopedXErrorHandler();
~ScopedXErrorHandler();
/** \returns true if a X error occurred since the last time this method was called on this ScopedXErrorHandler object,
* or since the creation of this ScopedXErrorHandler object if this method was never called on it.
*
* \param ev this optional parameter, if set, will be filled with the XErrorEvent object. If multiple errors occurred,
* the first one will be returned.
*/
bool SyncAndGetError(Display *dpy, XErrorEvent *ev = nsnull);
/** Like SyncAndGetError, but does not sync. Faster, but only reliably catches errors in synchronous calls.
*
* \param ev this optional parameter, if set, will be filled with the XErrorEvent object. If multiple errors occurred,
* the first one will be returned.
*/
bool GetError(XErrorEvent *ev = nsnull);
};
} // namespace mozilla
#endif // mozilla_X11Util_h
|