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39 :
40 : #include "X11Util.h"
41 :
42 : namespace mozilla {
43 :
44 : bool
45 0 : XVisualIDToInfo(Display* aDisplay, VisualID aVisualID,
46 : Visual** aVisual, unsigned int* aDepth)
47 : {
48 0 : if (aVisualID == None) {
49 0 : *aVisual = NULL;
50 0 : *aDepth = 0;
51 0 : return true;
52 : }
53 :
54 0 : const Screen* screen = DefaultScreenOfDisplay(aDisplay);
55 :
56 0 : for (int d = 0; d < screen->ndepths; d++) {
57 0 : Depth *d_info = &screen->depths[d];
58 0 : for (int v = 0; v < d_info->nvisuals; v++) {
59 0 : Visual* visual = &d_info->visuals[v];
60 0 : if (visual->visualid == aVisualID) {
61 0 : *aVisual = visual;
62 0 : *aDepth = d_info->depth;
63 0 : return true;
64 : }
65 : }
66 : }
67 :
68 0 : NS_ERROR("VisualID not on Screen.");
69 0 : return false;
70 : }
71 :
72 : ScopedXErrorHandler::ErrorEvent* ScopedXErrorHandler::sXErrorPtr;
73 :
74 : int
75 0 : ScopedXErrorHandler::ErrorHandler(Display *, XErrorEvent *ev)
76 : {
77 : // only record the error if no error was previously recorded.
78 : // this means that in case of multiple errors, it's the first error that we report.
79 0 : if (!sXErrorPtr->mError.error_code)
80 0 : sXErrorPtr->mError = *ev;
81 0 : return 0;
82 : }
83 :
84 0 : ScopedXErrorHandler::ScopedXErrorHandler()
85 : {
86 : // let sXErrorPtr point to this object's mXError object, but don't reset this mXError object!
87 : // think of the case of nested ScopedXErrorHandler's.
88 0 : mOldXErrorPtr = sXErrorPtr;
89 0 : sXErrorPtr = &mXError;
90 0 : mOldErrorHandler = XSetErrorHandler(ErrorHandler);
91 0 : }
92 :
93 0 : ScopedXErrorHandler::~ScopedXErrorHandler()
94 : {
95 0 : sXErrorPtr = mOldXErrorPtr;
96 0 : XSetErrorHandler(mOldErrorHandler);
97 0 : }
98 :
99 : bool
100 0 : ScopedXErrorHandler::SyncAndGetError(Display *dpy, XErrorEvent *ev)
101 : {
102 0 : XSync(dpy, False);
103 0 : return GetError(ev);
104 : }
105 :
106 : bool
107 0 : ScopedXErrorHandler::GetError(XErrorEvent *ev)
108 : {
109 0 : bool retval = mXError.mError.error_code != 0;
110 0 : if (ev)
111 0 : *ev = mXError.mError;
112 0 : mXError = ErrorEvent(); // reset
113 0 : return retval;
114 : }
115 :
116 : } // namespace mozilla
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