qapplication_x11.cpp

奇趣公司比较新的qt/emd版本

        } else if (arg == "-geometry") {
            if (++i < argc)
                mwGeometry = argv[i];
        } else if (arg == "-im") {
            if (++i < argc)
                qt_ximServer = argv[i];
#if 0
        } else if (arg == "-noxim") {
            noxim=true;
#endif
        } else if (arg == "-ncols") {   // xv and netscape use this name
            if (++i < argc)
                X11->color_count = qMax(0,atoi(argv[i]));
        } else if (arg == "-visual") {  // xv and netscape use this name
            if (++i < argc && !X11->visual) {
                QString s = QString::fromLocal8Bit(argv[i]).toLower();
                if (s == QLatin1String("staticgray"))
                    X11->visual_class = StaticGray;
                else if (s == QLatin1String("grayscale"))
                    X11->visual_class = XGrayScale;
                else if (s == QLatin1String("staticcolor"))
                    X11->visual_class = StaticColor;
                else if (s == QLatin1String("pseudocolor"))
                    X11->visual_class = PseudoColor;
                else if (s == QLatin1String("truecolor"))
                    X11->visual_class = TrueColor;
                else if (s == QLatin1String("directcolor"))
                    X11->visual_class = DirectColor;
                else
                    X11->visual_id = static_cast<int>(strtol(argv[i], 0, 0));
            }
#ifndef QT_NO_XIM
        } else if (arg == "-inputstyle") {
            if (++i < argc) {
                QString s = QString::fromLocal8Bit(argv[i]).toLower();
                if (s == QLatin1String("onthespot"))
                    qt_xim_preferred_style = XIMPreeditCallbacks |
                                             XIMStatusNothing;
                else if (s == QLatin1String("overthespot"))
                    qt_xim_preferred_style = XIMPreeditPosition |
                                             XIMStatusNothing;
                else if (s == QLatin1String("offthespot"))
                    qt_xim_preferred_style = XIMPreeditArea |
                                             XIMStatusArea;
                else if (s == QLatin1String("root"))
                    qt_xim_preferred_style = XIMPreeditNothing |
                                             XIMStatusNothing;
            }
#endif
        } else if (arg == "-cmap") {    // xv uses this name
            if (!X11->colormap)
                X11->custom_cmap = true;
        }
#if defined(QT_DEBUG)
        else if (arg == "-sync")
            appSync = !appSync;
        else if (arg == "-nograb")
            appNoGrab = !appNoGrab;
        else if (arg == "-dograb")
            appDoGrab = !appDoGrab;
#endif
        else
            argv[j++] = argv[i];
    }

    priv->argc = j;

#if defined(QT_DEBUG) && defined(Q_OS_LINUX)
    if (!appNoGrab && !appDoGrab) {
        QString s;
        s.sprintf("/proc/%d/cmdline", getppid());
        QFile f(s);
        if (f.open(QIODevice::ReadOnly)) {
            s.clear();
            char c;
            while (f.getChar(&c) && c) {
                if (c == '/')
                    s.clear();
                else
                    s += QLatin1Char(c);
            }
            if (s == QLatin1String("gdb")) {
                appNoGrab = true;
                qDebug("Qt: gdb: -nograb added to command-line options.\n"
                       "\t Use the -dograb option to enforce grabbing.");
            }
            f.close();
        }
    }
#endif

    // Connect to X server
    if (qt_is_gui_used && !X11->display) {
        if ((X11->display = XOpenDisplay(X11->displayName)) == 0) {
            qWarning("%s: cannot connect to X server %s", appName,
                     XDisplayName(X11->displayName));
            QApplicationPrivate::reset_instance_pointer();
            exit(1);
        }

        if (appSync)                                // if "-sync" argument
            XSynchronize(X11->display, true);
    }

    // Common code, regardless of whether display is foreign.

    // Get X parameters

    if (qt_is_gui_used) {
        X11->defaultScreen = DefaultScreen(X11->display);
        X11->screenCount = ScreenCount(X11->display);

        X11->screens = new QX11InfoData[X11->screenCount];

        for (int s = 0; s < X11->screenCount; s++) {
            QX11InfoData *screen = X11->screens + s;
            screen->ref = 1; // ensures it doesn't get deleted
            screen->screen = s;
            screen->dpiX = (DisplayWidth(X11->display, s) * 254 + DisplayWidthMM(X11->display, s)*5)
                           / (DisplayWidthMM(X11->display, s)*10);
            screen->dpiY = (DisplayHeight(X11->display, s) * 254 + DisplayHeightMM(X11->display, s)*5)
                           / (DisplayHeightMM(X11->display, s)*10);
        }

        QColormap::initialize();

        // Support protocols
        X11->xdndSetup();

        // Finally create all atoms
        qt_x11_create_intern_atoms();

        // initialize NET lists
        qt_get_net_supported();
        qt_get_net_virtual_roots();

#ifndef QT_NO_XRANDR
        // See if XRandR is supported on the connected display
        if (XQueryExtension(X11->display, "RANDR", &X11->xrandr_major,
                            &X11->xrandr_eventbase, &X11->xrandr_errorbase)
            && XRRQueryExtension(X11->display, &X11->xrandr_eventbase, &X11->xrandr_errorbase)) {
            // XRandR is supported
            X11->use_xrandr = true;
        }
#endif // QT_NO_XRANDR

#ifndef QT_NO_XRENDER
        int xrender_eventbase,  xrender_errorbase;
        // See if XRender is supported on the connected display
        if (XQueryExtension(X11->display, "RENDER", &X11->xrender_major,
                            &xrender_eventbase, &xrender_errorbase)
            && XRenderQueryExtension(X11->display, &xrender_eventbase,
                                     &xrender_errorbase)) {
            // XRender is supported, let's see if we have a PictFormat for the
            // default visual
            XRenderPictFormat *format =
                XRenderFindVisualFormat(X11->display,
                                        (Visual *) QX11Info::appVisual(X11->defaultScreen));
            // Check the version as well - we need v0.4 or higher
            int major = 0;
            int minor = 0;
            XRenderQueryVersion(X11->display, &major, &minor);
            if (qgetenv("QT_X11_NO_XRENDER").isNull() && format != 0) {
                X11->use_xrender = (major >= 0 && minor >= 5);
                X11->xrender_version = major*100+minor;
                // workaround for broken XServer on Ubuntu Breezy (6.8 compiled with 7.0
                // protocol headers)
                if (X11->xrender_version == 10
                    && VendorRelease(X11->display) < 60900000
                    && QByteArray(ServerVendor(X11->display)).contains("X.Org"))
                    X11->xrender_version = 9;
            }
        }
#endif // QT_NO_XRENDER

#ifndef QT_NO_XFIXES
        // See if Xfixes is supported on the connected display
        if (XQueryExtension(X11->display, "XFIXES", &X11->xfixes_major,
                            &X11->xfixes_eventbase, &X11->xfixes_errorbase)
            && XFixesQueryExtension(X11->display, &X11->xfixes_eventbase,
                                    &X11->xfixes_errorbase)) {
            // Xfixes is supported.
            // Note: the XFixes protocol version is negotiated using QueryVersion.
            // We supply the highest version we support, the X server replies with
            // the highest version it supports, but no higher than the version we
            // asked for. The version sent back is the protocol version the X server
            // will use to talk us. If this call is removed, the behavior of the
            // X server when it receives an XFixes request is undefined.
            int major = 3;
            int minor = 0;
            XFixesQueryVersion(X11->display, &major, &minor);
            X11->use_xfixes = (major >= 2);
            X11->xfixes_major = major;
        }
#endif // QT_NO_XFIXES

#if !defined(QT_NO_FONTCONFIG)
        int dpi = 0;
        getXDefault("Xft", FC_DPI, &dpi);
        if (dpi) {
            for (int s = 0; s < ScreenCount(X11->display); ++s) {
                QX11Info::setAppDpiX(s, dpi);
                QX11Info::setAppDpiY(s, dpi);
            }
        }
        double fc_scale = 1.;
        getXDefault("Xft", FC_SCALE, &fc_scale);
        X11->fc_scale = fc_scale;
        for (int s = 0; s < ScreenCount(X11->display); ++s) {
            int subpixel = FC_RGBA_UNKNOWN;
#if RENDER_MAJOR > 0 || RENDER_MINOR >= 6
            if (X11->use_xrender) {
                int rsp = XRenderQuerySubpixelOrder(X11->display, s);
                switch (rsp) {
                default:
                case SubPixelUnknown:
                    subpixel = FC_RGBA_UNKNOWN;
                    break;
                case SubPixelHorizontalRGB:
                    subpixel = FC_RGBA_RGB;
                    break;
                case SubPixelHorizontalBGR:
                    subpixel = FC_RGBA_BGR;
                    break;
                case SubPixelVerticalRGB:
                    subpixel = FC_RGBA_VRGB;
                    break;
                case SubPixelVerticalBGR:
                    subpixel = FC_RGBA_VBGR;
                    break;
                case SubPixelNone:
                    subpixel = FC_RGBA_NONE;
                    break;
                }
            }
#endif
            getXDefault("Xft", FC_RGBA, &subpixel);
            X11->screens[s].subpixel = subpixel;
        }
        getXDefault("Xft", FC_ANTIALIAS, &X11->fc_antialias);
#ifdef FC_HINT_STYLE
        getXDefault("Xft", FC_HINT_STYLE, &X11->fc_hint_style);
#endif
#if 0
        // ###### these are implemented by Xft, not sure we need them
        getXDefault("Xft", FC_AUTOHINT, &X11->fc_autohint);
        getXDefault("Xft", FC_HINTING, &X11->fc_autohint);
        getXDefault("Xft", FC_MINSPACE, &X11->fc_autohint);
#endif
#endif // QT_NO_XRENDER

        // initialize key mapper
        QKeyMapper::changeKeyboard();

#ifndef QT_NO_XKB
        if (qt_keymapper_private()->useXKB) {
            // If XKB is detected, set the GrabsUseXKBState option so input method
            // compositions continue to work (ie. deadkeys)
            unsigned int state = XkbPCF_GrabsUseXKBStateMask;
            (void) XkbSetPerClientControls(X11->display, state, &state);
        }
#endif // QT_NO_XKB

        // Misc. initialization
#if 0 //disabled for now..
        QSegfaultHandler::initialize(priv->argv, priv->argc);
#endif
        QCursorData::initialize();
    }
    QFont::initialize();

    if(qt_is_gui_used) {
        qApp->setObjectName(QString::fromLocal8Bit(appName));

        int screen;
        for (screen = 0; screen < X11->screenCount; ++screen) {
            XSelectInput(X11->display, QX11Info::appRootWindow(screen),
                         KeymapStateMask | EnterWindowMask | LeaveWindowMask | PropertyChangeMask);

#ifndef QT_NO_XRANDR
            if (X11->use_xrandr)
                XRRSelectInput(X11->display, QX11Info::appRootWindow(screen), True);
#endif // QT_NO_XRANDR
        }
    }

    if (qt_is_gui_used) {
        // Attempt to determine the current running X11 Desktop Enviornment
        // Use dbus if/when we can, but fall back to using windowManagerName() for now

        X11->desktopEnvironment = DE_UNKNOWN;

        // See if the current window manager is using the freedesktop.org spec to give its name
        Window windowManagerWindow = XNone;
        Atom typeReturned;
        int formatReturned;
        unsigned long nitemsReturned;
        unsigned long unused;
        unsigned char *data = 0;
        if (XGetWindowProperty(QX11Info::display(), QX11Info::appRootWindow(),
                           ATOM(_NET_SUPPORTING_WM_CHECK),
                           0, 1024, False, XA_WINDOW, &typeReturned,
                           &formatReturned, &nitemsReturned, &unused, &data)
              == Success) {
            if (typeReturned == XA_WINDOW && formatReturned == 32)
                windowManagerWindow = *((Window*) data);
            if (data)
                XFree(data);

            if (windowManagerWindow != XNone) {
                QString wmName;
                Atom utf8atom = ATOM(UTF8_STRING);
                if (XGetWindowProperty(QX11Info::display(), windowManagerWindow, ATOM(_NET_WM_NAME),
                                       0, 1024, False, utf8atom, &typeReturned,
                                       &formatReturned, &nitemsReturned, &unused, &data)
                    == Success) {
                    if (typeReturned == utf8atom && formatReturned == 8)
                        wmName = QString::fromUtf8((const char*)data);
                    if (data)
                        XFree(data);
                    if (wmName == QLatin1String("KWin"))
                        X11->desktopEnvironment = DE_KDE;
                    if (wmName == QLatin1String("Metacity"))
                        X11->desktopEnvironment = DE_GNOME;
                }
            }
        }

        // Running a different/newer/older window manager?  Try some other things
        if (X11->desktopEnvironment == DE_UNKNOWN){
            Atom type;
            int format;
            unsigned long length, after;
            uchar *data = 0;

            if (XGetWindowProperty(X11->display, QX11Info::appRootWindow(), ATOM(DTWM_IS_RUNNING),
                                   0, 1, False, AnyPropertyType, &type, &format, &length,
                                   &after, &data) == Success && length) {
                // DTWM is running, meaning most likely CDE is running...
                X11->desktopEnvironment = DE_CDE;
            } else if (XGetWindowProperty(X11->display, QX11Info::appRootWindow(),
                                          ATOM(GNOME_BACKGROUND_PROPERTIES), 0, 1, False, AnyPropertyType,
                                          &type, &format, &length, &after, &data) == Success && length) {
                X11->desktopEnvironment = DE_GNOME;
            } else if ((XGetWindowProperty(X11->display, QX11Info::appRootWindow(), ATOM(KDE_FULL_SESSION),
                                           0, 1, False, AnyPropertyType, &type, &format, &length, &after, &data) == Success
                        && length)
                       || (XGetWindowProperty(X11->display, QX11Info::appRootWindow(), ATOM(KWIN_RUNNING),
                                              0, 1, False, AnyPropertyType, &type, &format, &length,
                                              &after, &data) == Success
                           && length)
                       || (XGetWindowProperty(X11->display, QX11Info::appRootWindow(), ATOM(KWM_RUNNING),
                                              0, 1, False, AnyPropertyType, &type, &format, &length,
                                              &after, &data) == Success && length)) {
                X11->desktopEnvironment = DE_KDE;
            } else if (XGetWindowProperty(X11->display, QX11Info::appRootWindow(), ATOM(_SGI_DESKS_MANAGER),