qapplication_qws.cpp

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/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qglobal.h"
#include "qcursor.h"
#include "qapplication.h"
#include "private/qapplication_p.h"
#include "qwidget.h"
#include "qbitarray.h"
#include "qpainter.h"
#include "qpixmapcache.h"
#include "qdatetime.h"
#include "qtextcodec.h"
#include "qdatastream.h"
#include "qbuffer.h"
#include "qsocketnotifier.h"
#include "qsessionmanager.h"
#include "qclipboard.h"
#include "qbitmap.h"
#include "qwssocket_qws.h"
#include "qtransportauth_qws.h"
#include "private/qtransportauth_qws_p.h"
#include "qwsevent_qws.h"
#include "private/qwscommand_qws_p.h"
#include "qwsproperty_qws.h"
#include "qscreen_qws.h"
#include "qcopchannel_qws.h"
#include "private/qlock_p.h"
#include "private/qwslock_p.h"
//#include "qmemorymanager_qws.h"
#include "qwsmanager_qws.h"
//#include "qwsregionmanager_qws.h"
#include "qwindowsystem_qws.h"
#include "private/qwindowsystem_p.h"

#include "qwsdisplay_qws.h"
#include "private/qwsdisplay_qws_p.h"
#include "private/qwsinputcontext_p.h"
#include "qfile.h"
#include "qhash.h"
#include "qdesktopwidget.h"
#include "qcolormap.h"
#include "private/qcursor_p.h"
#include "qsettings.h"
#include "qdebug.h"
#include "qeventdispatcher_qws_p.h"
#include "private/qwidget_p.h"
#include "private/qbackingstore_p.h"
#include "private/qwindowsurface_qws_p.h"

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/types.h>

#ifndef QT_NO_QWS_MULTIPROCESS
#ifdef QT_NO_QSHM
#include <sys/ipc.h>
#include <sys/shm.h>
#ifndef Q_OS_DARWIN
# include <sys/sem.h>
#endif
#include <sys/socket.h>
#else
#include "private/qsharedmemory_p.h"
#endif
#endif

#ifndef QT_NO_DIRECTPAINTER
class QDirectPainter;
extern void qt_directpainter_region(QDirectPainter *dp, const QRegion &alloc, int type);
#ifndef QT_NO_QWSEMBEDWIDGET
extern void qt_directpainter_embedevent(QDirectPainter *dp,
                                        const QWSEmbedEvent *e);
#endif
#endif // QT_NO_DIRECTPAINTER

const int qwsSharedRamSize = 1 * 1024; // misc data, written by server, read by clients

extern QApplication::Type qt_appType;
extern bool qt_app_has_font;

//these used to be environment variables, they are initialized from
//environment variables in

bool qws_savefonts = false;
bool qws_screen_is_interlaced=false; //### should be detected
bool qws_shared_memory = false;
bool qws_sw_cursor = true;
bool qws_accel = true;            // ### never set
QByteArray qws_display_spec(":0");
Q_GUI_EXPORT int qws_display_id = 0;
int qws_client_id = 0;
QWidget *qt_pressGrab = 0;
QWidget *qt_mouseGrb = 0;
int *qt_last_x = 0;
int *qt_last_y = 0;

static int mouse_x_root = -1;
static int mouse_y_root = -1;
static int mouse_state = 0;

int qt_servershmid = -1;

bool qws_overrideCursor = false;
#ifndef QT_NO_QWS_MANAGER
#include "qdecorationfactory_qws.h"
static QDecoration *qws_decoration = 0;
#endif

#if defined(QT_DEBUG)
/*
extern "C" void dumpmem(const char* m)
{
    static int init=0;
    static int prev=0;
    FILE* f = fopen("/proc/meminfo","r");
    //    char line[100];
    int total=0,used=0,free=0,shared=0,buffers=0,cached=0;
    fscanf(f,"%*[^M]Mem: %d %d %d %d %d %d",&total,&used,&free,&shared,&buffers,&cached);
    used -= buffers + cached;
    if (!init) {
        init=used;
    } else {
        printf("%40s: %+8d = %8d\n",m,used-init-prev,used-init);
        prev = used-init;
    }
    fclose(f);
}
*/
#endif

// Get the name of the directory where Qtopia Core temporary data should
// live.
QString qws_dataDir()
{
    QByteArray dataDir = QString("/tmp/qtembedded-%1").arg(qws_display_id).toLocal8Bit();
    if (mkdir(dataDir, 0700)) {
        if (errno != EEXIST) {
            qFatal("Cannot create Qtopia Core data directory: %s", dataDir.constData());
        }
    }

    struct stat buf;
    if (lstat(dataDir, &buf))
        qFatal("stat failed for Qtopia Core data directory: %s", dataDir.constData());

    if (!S_ISDIR(buf.st_mode))
        qFatal("%s is not a directory", dataDir.constData());
    if (buf.st_uid != getuid())
        qFatal("Qtopia Core data directory is not owned by user %d", getuid());

    if ((buf.st_mode & 0677) != 0600)
        qFatal("Qtopia Core data directory has incorrect permissions: %s", dataDir.constData());
    dataDir += "/";

    return QString(dataDir);
}

// Get the filename of the pipe Qtopia Core uses for server/client comms
Q_GUI_EXPORT QString qws_qtePipeFilename()
{
    return (qws_dataDir() + QString(QTE_PIPE).arg(qws_display_id));
}

static void setMaxWindowRect(const QRect &rect)
{
    const QList<QScreen*> subScreens = qt_screen->subScreens();
    QScreen *screen = qt_screen;
    for (int i = 0; i < subScreens.size(); ++i) {
        if (subScreens.at(i)->region().contains(rect)) {
            screen = subScreens.at(i);
            break;
        }
    }

    const QSize devSize(screen->deviceWidth(), screen->deviceHeight());
    QRect r = screen->mapFromDevice(rect, devSize);

    QApplicationPrivate *ap = QApplicationPrivate::instance();
    ap->setMaxWindowRect(screen, r);
}

void QApplicationPrivate::setMaxWindowRect(const QScreen *screen,
                                           const QRect &rect)
{
    if (maxWindowRects.value(screen) == rect)
        return;

    maxWindowRects[screen] = rect;

    // Re-resize any maximized windows
    QWidgetList l = QApplication::topLevelWidgets();
    for (int i = 0; i < l.size(); ++i) {
        QWidget *w = l.at(i);
        QScreen *s = w->d_func()->getScreen();
        if (w->isVisible() && w->isMaximized() && s == screen) {
            w->showNormal(); //#### flicker
            w->showMaximized();
        }
    }
}

/*****************************************************************************
  Internal variables and functions
 *****************************************************************************/


static QString appName;                          // application name
static const char *appFont = 0;                  // application font
static const char *appBGCol = 0;                 // application bg color
static const char *appFGCol = 0;                 // application fg color
static const char *appBTNCol = 0;                // application btn color
static const char *mwGeometry = 0;               // main widget geometry
static const char *mwTitle = 0;                  // main widget title
//static bool mwIconic = false;                  // main widget iconified

static bool app_do_modal = false;                // modal mode
Q_GUI_EXPORT QWSDisplay *qt_fbdpy = 0;                        // QWS `display'
QLock *QWSDisplay::lock = 0;

static int mouseButtonPressed = 0;               // last mouse button pressed
static int mouseButtonPressTime = 0;             // when was a button pressed
static short mouseXPos, mouseYPos;               // mouse position in act window

extern QWidgetList *qt_modal_stack;              // stack of modal widgets

static QWidget *popupButtonFocus = 0;
static QWidget *popupOfPopupButtonFocus = 0;
static bool popupCloseDownMode = false;
static bool popupGrabOk;
static QPointer<QWidget> *mouseInWidget = 0;

static bool sm_blockUserInput = false;           // session management

QWidget *qt_button_down = 0;                     // widget got last button-down
WId qt_last_cursor = 0xffffffff;                 // Was -1, but WIds are unsigned

class QWSMouseEvent;
class QWSKeyEvent;

class QETWidget : public QWidget                 // event translator widget
{
public:
    bool translateMouseEvent(const QWSMouseEvent *, int oldstate);
    bool translateKeyEvent(const QWSKeyEvent *, bool grab);
    bool translateRegionEvent(const QWSRegionEvent *);
#ifndef QT_NO_QWSEMBEDWIDGET
    void translateEmbedEvent(const QWSEmbedEvent *event);
#endif
    bool translateWheelEvent(const QWSMouseEvent *me);
    void repaintDecoration(QRegion r, bool post);
    void updateRegion();

    bool raiseOnClick()
    {
        // With limited windowmanagement/taskbar/etc., raising big windows
        // (eg. spreadsheet) over the top of everything else (eg. calculator)
        // is just annoying.
        return !isMaximized() && !isFullScreen();
    }
};

void QApplicationPrivate::createEventDispatcher()
{
    Q_Q(QApplication);
    eventDispatcher = (q->type() != QApplication::Tty
                       ? new QEventDispatcherQWS(q)
                       : new QEventDispatcherUNIX(q));
}

// Single-process stuff. This should maybe move into qwindowsystem_qws.cpp

static bool qws_single_process;
static QList<QWSEvent*> incoming;
static QList<QWSCommand*> outgoing;

void qt_client_enqueue(const QWSEvent *event)
{
    QWSEvent *copy = QWSEvent::factory(event->type);
    copy->copyFrom(event);
    incoming.append(copy);
}

QList<QWSCommand*> *qt_get_server_queue()
{
    return &outgoing;
}

void qt_server_enqueue(const QWSCommand *command)
{
    QWSCommand *copy = QWSCommand::factory(command->type);
    copy->copyFrom(command);
    outgoing.append(copy);
}

QWSDisplay::Data::Data(QObject* parent, bool singleProcess)
{
#ifdef QT_NO_QWS_MULTIPROCESS
    Q_UNUSED(parent);
    Q_UNUSED(singleProcess);
#else
    if (singleProcess)
        csocket = 0;
    else {
        csocket = new QWSSocket(parent);
        QObject::connect(csocket, SIGNAL(disconnected()),
                         qApp, SLOT(quit()));
    }
    clientLock = 0;
#endif
    init();
}

QWSDisplay::Data::~Data()
{
//        delete rgnMan; rgnMan = 0;
//        delete memorymanager; memorymanager = 0;
    qt_screen->disconnect();
    delete qt_screen; qt_screen = 0;
#ifndef QT_NO_QWS_CURSOR
    delete qt_screencursor; qt_screencursor = 0;
#endif
#ifndef QT_NO_QWS_MULTIPROCESS
    shm.detach();
    if (csocket) {
        csocket->flush(); // may be pending QCop message, eg.
        delete csocket;
    }
    delete clientLock;
    clientLock = 0;
#endif
    delete connected_event;
    delete mouse_event;
    delete current_event;
    qDeleteAll(queue);
#ifndef QT_NO_COP
    delete qcop_response;
#endif
}

bool QWSDisplay::Data::lockClient(QWSLock::LockType type, int timeout)
{
    return !clientLock || clientLock->lock(type, timeout);
}

void QWSDisplay::Data::unlockClient(QWSLock::LockType type)
{
    if (clientLock) clientLock->unlock(type);
}

bool QWSDisplay::Data::waitClient(QWSLock::LockType type, int timeout)
{
    return !clientLock || clientLock->wait(type, timeout);
}

QWSLock* QWSDisplay::Data::getClientLock()
{
    return clientLock;
}

void QWSDisplay::Data::flush()
{
#ifndef QT_NO_QWS_MULTIPROCESS
    if (csocket) {
        csocket->waitForReadyRead(0);
        csocket->flush();
   }
#endif
}

#if 0
void QWSDisplay::Data::debugQueue() {
    for (int i = 0; i < queue.size(); ++i) {
        QWSEvent *e = queue.at(i);
        qDebug( "   ev %d type %d sl %d rl %d", i, e->type, e->simpleLen, e->rawLen);
    }
}
#endif

bool QWSDisplay::Data::queueNotEmpty()
{
    return mouse_event/*||region_event*/||queue.count() > 0;
}
QWSEvent* QWSDisplay::Data::dequeue()
{
    QWSEvent *r=0;
    if (queue.count()) {
        r = queue.first(); queue.removeFirst();
    } else if (mouse_event) {
        r = mouse_event;
        mouse_event = 0;
#ifdef QAPPLICATION_EXTRA_DEBUG
        mouse_event_count = 0;
#endif
#if 0
    } else {
        r = region_event;
        region_event = 0;
#endif
    }
    return r;
}

QWSEvent* QWSDisplay::Data::peek()
{
    return queue.first();
}

bool QWSDisplay::Data::directServerConnection()
{
#ifndef QT_NO_QWS_MULTIPROCESS
    return csocket == 0;
#else
    return true;
#endif
}

#if 0
void QWSDisplay::Data::offsetPendingExpose(int, const QPoint &);