1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/src/X11Util.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,86 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim: sw=2 ts=8 et :
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#include "X11Util.h"
1.12 +#include "nsDebug.h" // for NS_ASSERTION, etc
1.13 +
1.14 +namespace mozilla {
1.15 +
1.16 +void
1.17 +FindVisualAndDepth(Display* aDisplay, VisualID aVisualID,
1.18 + Visual** aVisual, int* aDepth)
1.19 +{
1.20 + const Screen* screen = DefaultScreenOfDisplay(aDisplay);
1.21 +
1.22 + for (int d = 0; d < screen->ndepths; d++) {
1.23 + Depth *d_info = &screen->depths[d];
1.24 + for (int v = 0; v < d_info->nvisuals; v++) {
1.25 + Visual* visual = &d_info->visuals[v];
1.26 + if (visual->visualid == aVisualID) {
1.27 + *aVisual = visual;
1.28 + *aDepth = d_info->depth;
1.29 + return;
1.30 + }
1.31 + }
1.32 + }
1.33 +
1.34 + NS_ASSERTION(aVisualID == None, "VisualID not on Screen.");
1.35 + *aVisual = nullptr;
1.36 + *aDepth = 0;
1.37 + return;
1.38 +}
1.39 +
1.40 +void
1.41 +FinishX(Display* aDisplay)
1.42 +{
1.43 + unsigned long lastRequest = NextRequest(aDisplay) - 1;
1.44 + if (lastRequest == LastKnownRequestProcessed(aDisplay))
1.45 + return;
1.46 +
1.47 + XSync(aDisplay, False);
1.48 +}
1.49 +
1.50 +ScopedXErrorHandler::ErrorEvent* ScopedXErrorHandler::sXErrorPtr;
1.51 +
1.52 +int
1.53 +ScopedXErrorHandler::ErrorHandler(Display *, XErrorEvent *ev)
1.54 +{
1.55 + // only record the error if no error was previously recorded.
1.56 + // this means that in case of multiple errors, it's the first error that we report.
1.57 + if (!sXErrorPtr->mError.error_code)
1.58 + sXErrorPtr->mError = *ev;
1.59 + return 0;
1.60 +}
1.61 +
1.62 +ScopedXErrorHandler::ScopedXErrorHandler()
1.63 +{
1.64 + // let sXErrorPtr point to this object's mXError object, but don't reset this mXError object!
1.65 + // think of the case of nested ScopedXErrorHandler's.
1.66 + mOldXErrorPtr = sXErrorPtr;
1.67 + sXErrorPtr = &mXError;
1.68 + mOldErrorHandler = XSetErrorHandler(ErrorHandler);
1.69 +}
1.70 +
1.71 +ScopedXErrorHandler::~ScopedXErrorHandler()
1.72 +{
1.73 + sXErrorPtr = mOldXErrorPtr;
1.74 + XSetErrorHandler(mOldErrorHandler);
1.75 +}
1.76 +
1.77 +bool
1.78 +ScopedXErrorHandler::SyncAndGetError(Display *dpy, XErrorEvent *ev)
1.79 +{
1.80 + FinishX(dpy);
1.81 +
1.82 + bool retval = mXError.mError.error_code != 0;
1.83 + if (ev)
1.84 + *ev = mXError.mError;
1.85 + mXError = ErrorEvent(); // reset
1.86 + return retval;
1.87 +}
1.88 +
1.89 +} // namespace mozilla
