qwidget_x11.cpp

奇趣公司比较新的qt/emd版本

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#include "qevent.h"
#include "qwidget.h"
#include "qdesktopwidget.h"
#include "qapplication.h"
#include "qapplication_p.h"
#include "qnamespace.h"
#include "qpainter.h"
#include "qbitmap.h"
#include "qlayout.h"
#include "qtextcodec.h"
#include "qdatetime.h"
#include "qcursor.h"
#include "qstack.h"
#include "qcolormap.h"
#include "qdebug.h"
#include "private/qbackingstore_p.h"

extern bool qt_sendSpontaneousEvent(QObject *, QEvent *); //qapplication_x11.cpp

#include <private/qpixmap_p.h>
#include <private/qpaintengine_x11_p.h>
#include "qt_x11_p.h"
#include "qx11info_x11.h"

#include <stdlib.h>

// defined in qapplication_x11.cpp
bool qt_wstate_iconified(WId);
void qt_updated_rootinfo();


#if !defined(QT_NO_IM)
#include "qinputcontext.h"
#include "qinputcontextfactory.h"
#endif

#include "qwidget_p.h"

#define XCOORD_MAX 16383
#define WRECT_MAX 8191

extern bool qt_nograb();

static QWidget *mouseGrb    = 0;
static QWidget *keyboardGrb = 0;


int qt_x11_create_desktop_on_screen = -1;


// MWM support
struct QtMWMHints {
    ulong flags, functions, decorations;
    long input_mode;
    ulong status;
};

enum {
    MWM_HINTS_FUNCTIONS   = (1L << 0),

    MWM_FUNC_ALL      = (1L << 0),
    MWM_FUNC_RESIZE   = (1L << 1),
    MWM_FUNC_MOVE     = (1L << 2),
    MWM_FUNC_MINIMIZE = (1L << 3),
    MWM_FUNC_MAXIMIZE = (1L << 4),
    MWM_FUNC_CLOSE    = (1L << 5),

    MWM_HINTS_DECORATIONS = (1L << 1),

    MWM_DECOR_ALL      = (1L << 0),
    MWM_DECOR_BORDER   = (1L << 1),
    MWM_DECOR_RESIZEH  = (1L << 2),
    MWM_DECOR_TITLE    = (1L << 3),
    MWM_DECOR_MENU     = (1L << 4),
    MWM_DECOR_MINIMIZE = (1L << 5),
    MWM_DECOR_MAXIMIZE = (1L << 6),

    MWM_HINTS_INPUT_MODE = (1L << 2),

    MWM_INPUT_MODELESS                  = 0L,
    MWM_INPUT_PRIMARY_APPLICATION_MODAL = 1L,
    MWM_INPUT_FULL_APPLICATION_MODAL    = 3L
};


static QtMWMHints GetMWMHints(Display *display, Window window)
{
    QtMWMHints mwmhints;

    Atom type;
    int format;
    ulong nitems, bytesLeft;
    uchar *data = 0;
    if ((XGetWindowProperty(display, window, ATOM(_MOTIF_WM_HINTS), 0, 5, false,
                            ATOM(_MOTIF_WM_HINTS), &type, &format, &nitems, &bytesLeft,
                            &data) == Success)
        && (type == ATOM(_MOTIF_WM_HINTS)
            && format == 32
            && nitems >= 5)) {
        mwmhints = *(reinterpret_cast<QtMWMHints *>(data));
    } else {
        mwmhints.flags = 0L;
        mwmhints.functions = MWM_FUNC_ALL;
        mwmhints.decorations = MWM_DECOR_ALL;
        mwmhints.input_mode = 0L;
        mwmhints.status = 0L;
    }

    if (data)
        XFree(data);

    return mwmhints;
}

static void SetMWMHints(Display *display, Window window, const QtMWMHints &mwmhints)
{
    if (mwmhints.flags != 0l) {
        XChangeProperty(display, window, ATOM(_MOTIF_WM_HINTS), ATOM(_MOTIF_WM_HINTS), 32,
                        PropModeReplace, (unsigned char *) &mwmhints, 5);
    } else {
        XDeleteProperty(display, window, ATOM(_MOTIF_WM_HINTS));
    }
}

// Returns true if we should set WM_TRANSIENT_FOR on \a w
static inline bool isTransient(const QWidget *w)
{
    return ((w->windowType() == Qt::Dialog
             || w->windowType() == Qt::Sheet
             || w->windowType() == Qt::Tool
             || w->windowType() == Qt::SplashScreen
             || w->windowType() == Qt::ToolTip
             || w->windowType() == Qt::Drawer)
            // In 4.4, Qt::WA_X11BypassTransientForHint = 99
            && !w->testAttribute(Qt::WidgetAttribute(99)));
}

static void do_size_hints(QWidget* widget, QWExtra *x);

/*****************************************************************************
  QWidget member functions
 *****************************************************************************/

const uint stdWidgetEventMask =                        // X event mask
        (uint)(
            KeyPressMask | KeyReleaseMask |
            ButtonPressMask | ButtonReleaseMask |
            KeymapStateMask |
            ButtonMotionMask | PointerMotionMask |
            EnterWindowMask | LeaveWindowMask |
            FocusChangeMask |
            ExposureMask |
            PropertyChangeMask |
            StructureNotifyMask
       );

const uint stdDesktopEventMask =                        // X event mask
       (uint)(
           KeymapStateMask |
           EnterWindowMask | LeaveWindowMask |
           PropertyChangeMask
      );


/*
  The qt_ functions below are implemented in qwidgetcreate_x11.cpp.
*/

Window qt_XCreateWindow(const QWidget *creator,
                         Display *display, Window parent,
                         int x, int y, uint w, uint h,
                         int borderwidth, int depth,
                         uint windowclass, Visual *visual,
                         ulong valuemask, XSetWindowAttributes *attributes);
Window qt_XCreateSimpleWindow(const QWidget *creator,
                               Display *display, Window parent,
                               int x, int y, uint w, uint h, int borderwidth,
                               ulong border, ulong background);
void qt_XDestroyWindow(const QWidget *destroyer,
                        Display *display, Window window);


static void qt_insert_sip(QWidget* scrolled_widget, int dx, int dy)
{
    QX11Data::ScrollInProgress sip = { X11->sip_serial++, scrolled_widget, dx, dy };
    X11->sip_list.append(sip);

    XClientMessageEvent client_message;
    client_message.type = ClientMessage;
    client_message.window = scrolled_widget->internalWinId();
    client_message.format = 32;
    client_message.message_type = ATOM(_QT_SCROLL_DONE);
    client_message.data.l[0] = sip.id;

    XSendEvent(X11->display, scrolled_widget->internalWinId(), False, NoEventMask,
        (XEvent*)&client_message);
}

static int qt_sip_count(QWidget* scrolled_widget)
{
    int sips=0;

    for (int i = 0; i < X11->sip_list.size(); ++i) {
        const QX11Data::ScrollInProgress &sip = X11->sip_list.at(i);
        if (sip.scrolled_widget == scrolled_widget)
            sips++;
    }

    return sips;
}

static void create_wm_client_leader()
{
    if (X11->wm_client_leader) return;

    X11->wm_client_leader =
        XCreateSimpleWindow(X11->display,
                             QX11Info::appRootWindow(),
                             0, 0, 1, 1, 0, 0, 0);

    // set client leader property to itself
    XChangeProperty(X11->display,
                     X11->wm_client_leader, ATOM(WM_CLIENT_LEADER),
                     XA_WINDOW, 32, PropModeReplace,
                     (unsigned char *)&X11->wm_client_leader, 1);

#ifndef QT_NO_SESSIONMANAGER
    // If we are session managed, inform the window manager about it
    QByteArray session = qApp->sessionId().toLatin1();
    if (!session.isEmpty()) {
        XChangeProperty(X11->display,
                         X11->wm_client_leader, ATOM(SM_CLIENT_ID),
                         XA_STRING, 8, PropModeReplace,
                         (unsigned char *)session.data(), session.size());
    }
#endif
}


Q_GUI_EXPORT void qt_x11_enforce_cursor(QWidget * w)
{
    if (!w->testAttribute(Qt::WA_WState_Created))
        return;
    if (w->isWindow() || w->testAttribute(Qt::WA_SetCursor)) {
        QCursor *oc = QApplication::overrideCursor();
        if (oc) {
            XDefineCursor(X11->display, w->internalWinId(), oc->handle());
        } else if (w->isEnabled()) {
            XDefineCursor(X11->display, w->internalWinId(), w->cursor().handle());
        } else {
            // enforce the windows behavior of clearing the cursor on
            // disabled widgets
            XDefineCursor(X11->display, w->internalWinId(), XNone);
        }
    } else {
        XDefineCursor(X11->display, w->internalWinId(), XNone);
    }
}

Q_GUI_EXPORT void qt_x11_wait_for_window_manager(QWidget* w)
{
    QApplication::flush();
    XEvent ev;
    QTime t;
    t.start();
    if (!w->testAttribute(Qt::WA_WState_Created))
        return;
    while (!XCheckTypedWindowEvent(X11->display, w->internalWinId(), ReparentNotify, &ev)) {
        if (XCheckTypedWindowEvent(X11->display, w->internalWinId(), MapNotify, &ev))
            break;
        if (t.elapsed() > 500)
            return; // give up, no event available
        qApp->syncX(); // non-busy wait
    }
    qApp->x11ProcessEvent(&ev);
    if (XCheckTypedWindowEvent(X11->display, w->internalWinId(), ConfigureNotify, &ev))
        qApp->x11ProcessEvent(&ev);
}

void qt_change_net_wm_state(const QWidget* w, bool set, Atom one, Atom two = 0)
{
    if (!w->isVisible()) // not managed by the window manager
        return;

    XEvent e;
    e.xclient.type = ClientMessage;
    e.xclient.message_type = ATOM(_NET_WM_STATE);
    e.xclient.display = X11->display;
    e.xclient.window = w->internalWinId();
    e.xclient.format = 32;
    e.xclient.data.l[0] = set ? 1 : 0;
    e.xclient.data.l[1] = one;
    e.xclient.data.l[2] = two;
    e.xclient.data.l[3] = 0;
    e.xclient.data.l[4] = 0;
    XSendEvent(X11->display, RootWindow(X11->display, w->x11Info().screen()),
               false, (SubstructureNotifyMask | SubstructureRedirectMask), &e);
}

static QVector<Atom> getNetWmState(QWidget *w)
{
    QVector<Atom> returnValue;

    // Don't read anything, just get the size of the property data
    Atom actualType;
    int actualFormat;
    ulong propertyLength;
    ulong bytesLeft;
    uchar *propertyData = 0;
    if (XGetWindowProperty(X11->display, w->internalWinId(), ATOM(_NET_WM_STATE), 0, 0,
                           False, XA_ATOM, &actualType, &actualFormat,
                           &propertyLength, &bytesLeft, &propertyData) == Success
        && actualType == XA_ATOM && actualFormat == 32) {
        returnValue.resize(bytesLeft / 4);
        XFree((char*) propertyData);

        // fetch all data
        if (XGetWindowProperty(X11->display, w->internalWinId(), ATOM(_NET_WM_STATE), 0,
                               returnValue.size(), False, XA_ATOM, &actualType, &actualFormat,
                               &propertyLength, &bytesLeft, &propertyData) != Success) {
            returnValue.clear();
        } else if (propertyLength != (ulong)returnValue.size()) {
            returnValue.resize(propertyLength);
        }