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comparison: gfx/src/X11Util.cpp
gfx/src/X11Util.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:1128a64e2966 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * vim: sw=2 ts=8 et : | |
| 3 */ | |
| 4 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #include "X11Util.h" | |
| 9 #include "nsDebug.h" // for NS_ASSERTION, etc | |
| 10 | |
| 11 namespace mozilla { | |
| 12 | |
| 13 void | |
| 14 FindVisualAndDepth(Display* aDisplay, VisualID aVisualID, | |
| 15 Visual** aVisual, int* aDepth) | |
| 16 { | |
| 17 const Screen* screen = DefaultScreenOfDisplay(aDisplay); | |
| 18 | |
| 19 for (int d = 0; d < screen->ndepths; d++) { | |
| 20 Depth *d_info = &screen->depths[d]; | |
| 21 for (int v = 0; v < d_info->nvisuals; v++) { | |
| 22 Visual* visual = &d_info->visuals[v]; | |
| 23 if (visual->visualid == aVisualID) { | |
| 24 *aVisual = visual; | |
| 25 *aDepth = d_info->depth; | |
| 26 return; | |
| 27 } | |
| 28 } | |
| 29 } | |
| 30 | |
| 31 NS_ASSERTION(aVisualID == None, "VisualID not on Screen."); | |
| 32 *aVisual = nullptr; | |
| 33 *aDepth = 0; | |
| 34 return; | |
| 35 } | |
| 36 | |
| 37 void | |
| 38 FinishX(Display* aDisplay) | |
| 39 { | |
| 40 unsigned long lastRequest = NextRequest(aDisplay) - 1; | |
| 41 if (lastRequest == LastKnownRequestProcessed(aDisplay)) | |
| 42 return; | |
| 43 | |
| 44 XSync(aDisplay, False); | |
| 45 } | |
| 46 | |
| 47 ScopedXErrorHandler::ErrorEvent* ScopedXErrorHandler::sXErrorPtr; | |
| 48 | |
| 49 int | |
| 50 ScopedXErrorHandler::ErrorHandler(Display *, XErrorEvent *ev) | |
| 51 { | |
| 52 // only record the error if no error was previously recorded. | |
| 53 // this means that in case of multiple errors, it's the first error that we report. | |
| 54 if (!sXErrorPtr->mError.error_code) | |
| 55 sXErrorPtr->mError = *ev; | |
| 56 return 0; | |
| 57 } | |
| 58 | |
| 59 ScopedXErrorHandler::ScopedXErrorHandler() | |
| 60 { | |
| 61 // let sXErrorPtr point to this object's mXError object, but don't reset this mXError object! | |
| 62 // think of the case of nested ScopedXErrorHandler's. | |
| 63 mOldXErrorPtr = sXErrorPtr; | |
| 64 sXErrorPtr = &mXError; | |
| 65 mOldErrorHandler = XSetErrorHandler(ErrorHandler); | |
| 66 } | |
| 67 | |
| 68 ScopedXErrorHandler::~ScopedXErrorHandler() | |
| 69 { | |
| 70 sXErrorPtr = mOldXErrorPtr; | |
| 71 XSetErrorHandler(mOldErrorHandler); | |
| 72 } | |
| 73 | |
| 74 bool | |
| 75 ScopedXErrorHandler::SyncAndGetError(Display *dpy, XErrorEvent *ev) | |
| 76 { | |
| 77 FinishX(dpy); | |
| 78 | |
| 79 bool retval = mXError.mError.error_code != 0; | |
| 80 if (ev) | |
| 81 *ev = mXError.mError; | |
| 82 mXError = ErrorEvent(); // reset | |
| 83 return retval; | |
| 84 } | |
| 85 | |
| 86 } // namespace mozilla |
