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Diffstat (limited to 'src/gui/guikernel/qmotifdnd_x11.cpp')
| -rw-r--r-- | src/gui/guikernel/qmotifdnd_x11.cpp | 1031 |
1 files changed, 1031 insertions, 0 deletions
diff --git a/src/gui/guikernel/qmotifdnd_x11.cpp b/src/gui/guikernel/qmotifdnd_x11.cpp new file mode 100644 index 0000000000..eef4cc470b --- /dev/null +++ b/src/gui/guikernel/qmotifdnd_x11.cpp @@ -0,0 +1,1031 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/* The following copyright notice pertains to the code as contributed +to Qt, not to Nokia's modifications. It is replicated +in doc/dnd.doc, where the documentation system can see it. */ + +/* Copyright 1996 Daniel Dardailler. + + Permission to use, copy, modify, distribute, and sell this software + for any purpose is hereby granted without fee, provided that the above + copyright notice appear in all copies and that both that copyright + notice and this permission notice appear in supporting documentation, + and that the name of Daniel Dardailler not be used in advertising or + publicity pertaining to distribution of the software without specific, + written prior permission. Daniel Dardailler makes no representations + about the suitability of this software for any purpose. It is + provided "as is" without express or implied warranty. + + Modifications Copyright 1999 Matt Koss, under the same license as + above. +************************************************************/ + +/***********************************************************/ +/* Motif Drag&Drop Dynamic Protocol messaging API code */ +/* Only requires Xlib layer - not MT safe */ +/* Author: Daniel Dardailler, daniel@x.org */ +/* Adapted by: Matt Koss, koss@napri.sk */ +/* Further adaptions by: Nokia Corporation and/or its subsidiary(-ies) */ +/***********************************************************/ + +#include "qplatformdefs.h" + +#include "qapplication.h" + +#ifndef QT_NO_DRAGANDDROP + +#include "qdebug.h" +#include "qtextcodec.h" +#include "qwidget.h" +#include "qevent.h" +#include "qt_x11_p.h" +#include "qx11info_x11.h" +#include "qiodevice.h" +#include "qdnd_p.h" + +#include <stdlib.h> + +QT_BEGIN_NAMESPACE + +static Window sourceWindow = XNone; +static QWidget *dropWidget = 0; +static Qt::DropAction lastAcceptedAction = Qt::IgnoreAction; + +static Atom Dnd_selection = 0; +static Time Dnd_selection_time; + +static Atom * src_targets ; +static ushort num_src_targets ; + +// Motif definitions +#define DndVersion 1 +#define DndRevision 0 +#define DndIncludeVersion (DndVersion * 10 + DndRevision) + +/* The following values are used in the DndData structure */ + +/* protocol style */ +#define DND_DRAG_NONE 0 +#define DND_DRAG_DROP_ONLY 1 +#define DND_DRAG_DYNAMIC 5 + +/* message type */ +#define DND_TOP_LEVEL_ENTER 0 +#define DND_TOP_LEVEL_LEAVE 1 +#define DND_DRAG_MOTION 2 +#define DND_DROP_SITE_ENTER 3 +#define DND_DROP_SITE_LEAVE 4 +#define DND_DROP_START 5 +#define DND_OPERATION_CHANGED 8 + +/* operation(s) */ +#define DND_NOOP 0L +#define DND_MOVE (1L << 0) +#define DND_COPY (1L << 1) +#define DND_LINK (1L << 2) + +static Qt::DropActions DndOperationsToQtDropActions(uchar op) +{ + Qt::DropActions actions = Qt::IgnoreAction; + if (op | DND_MOVE) + actions |= Qt::MoveAction; + if (op | DND_COPY) + actions |= Qt::CopyAction; + if (op | DND_LINK) + actions |= Qt::LinkAction; + return actions; +} + +static uchar QtDropActionToDndOperation(Qt::DropAction action) +{ + switch (action & Qt::ActionMask) { + case Qt::CopyAction: + default: + return DND_COPY; + case Qt::MoveAction: + return DND_MOVE; + case Qt::LinkAction: + return DND_LINK; + } +} + + +/* status */ +#define DND_NO_DROP_SITE 1 +#define DND_INVALID_DROP_SITE 2 +#define DND_VALID_DROP_SITE 3 + +/* completion */ +#define DND_DROP 0 +#define DND_DROP_HELP 1 +#define DND_DROP_CANCEL 2 + +#define BYTE unsigned char +#define CARD32 unsigned int +#define CARD16 unsigned short +#define INT16 signed short + +/* Client side structure used in the API */ +typedef struct { + unsigned char reason; /* message type: DND_TOP_LEVEL_ENTER, etc */ + Time time ; + unsigned char operation; + unsigned char operations; + unsigned char status; + unsigned char completion; + short x ; + short y ; + Window src_window ; + Atom property ; +} DndData ; + + +typedef struct _DndSrcProp { + BYTE byte_order ; + BYTE protocol_version ; + CARD16 target_index ; + CARD32 selection ; +} DndSrcProp ; + +typedef struct _DndReceiverProp { + BYTE byte_order ; + BYTE protocol_version ; + BYTE protocol_style ; + BYTE pad1; + CARD32 proxy_window; + CARD16 num_drop_sites ; + CARD16 pad2; + CARD32 total_size; +} DndReceiverProp ; + +/* need to use some union hack since window and property are in + different order depending on the message ... */ +typedef struct _DndTop { + CARD32 src_window; + CARD32 property; +} DndTop ; + +typedef struct _DndPot { + INT16 x; + INT16 y; + CARD32 property; + CARD32 src_window; +} DndPot ; + +typedef struct _DndMessage { + BYTE reason; + BYTE byte_order; + CARD16 flags; + CARD32 time; + union { + DndTop top ; + DndPot pot ; + } data ; +} DndMessage ; + +typedef struct { + BYTE byte_order; + BYTE protocol_version; + CARD16 num_target_lists; + CARD32 data_size; + /* then come series of CARD16,CARD32,CARD32,CARD32... */ +} DndTargets; + + +/* protocol version */ +#define DND_PROTOCOL_VERSION 0 + + +#define DND_EVENT_TYPE_MASK ((BYTE)0x80) +#define DND_EVENT_TYPE_SHIFT 7 +#define DND_CLEAR_EVENT_TYPE ((BYTE)0x7F) + +/* message_type is data[0] of the client_message + this return 1 (receiver bit up) or 0 (initiator) */ +#define DND_GET_EVENT_TYPE(message_type) \ +((char) (((message_type) & DND_EVENT_TYPE_MASK) >> DND_EVENT_TYPE_SHIFT)) + +/* event_type can be 0 (initiator) or 1 (receiver) */ +#define DND_SET_EVENT_TYPE(event_type) \ +(((BYTE)(event_type) << DND_EVENT_TYPE_SHIFT) & DND_EVENT_TYPE_MASK) + + +#define DND_OPERATION_MASK ((CARD16) 0x000F) +#define DND_OPERATION_SHIFT 0 +#define DND_STATUS_MASK ((CARD16) 0x00F0) +#define DND_STATUS_SHIFT 4 +#define DND_OPERATIONS_MASK ((CARD16) 0x0F00) +#define DND_OPERATIONS_SHIFT 8 +#define DND_COMPLETION_MASK ((CARD16) 0xF000) +#define DND_COMPLETION_SHIFT 12 + +#define DND_GET_OPERATION(flags) \ +((unsigned char) \ +(((flags) & DND_OPERATION_MASK) >> DND_OPERATION_SHIFT)) + +#define DND_SET_OPERATION(operation) \ +(((CARD16)(operation) << DND_OPERATION_SHIFT)\ +& DND_OPERATION_MASK) + +#define DND_GET_STATUS(flags) \ +((unsigned char) \ +(((flags) & DND_STATUS_MASK) >> DND_STATUS_SHIFT)) + +#define DND_SET_STATUS(status) \ +(((CARD16)(status) << DND_STATUS_SHIFT)\ +& DND_STATUS_MASK) + +#define DND_GET_OPERATIONS(flags) \ +((unsigned char) \ +(((flags) & DND_OPERATIONS_MASK) >> DND_OPERATIONS_SHIFT)) + +#define DND_SET_OPERATIONS(operation) \ +(((CARD16)(operation) << DND_OPERATIONS_SHIFT)\ +& DND_OPERATIONS_MASK) + +#define DND_GET_COMPLETION(flags) \ +((unsigned char) \ +(((flags) & DND_COMPLETION_MASK) >> DND_COMPLETION_SHIFT)) + +#define DND_SET_COMPLETION(completion) \ +(((CARD16)(completion) << DND_COMPLETION_SHIFT)\ +& DND_COMPLETION_MASK) + + +#define SWAP4BYTES(l) {\ +struct { unsigned t :32;} bit32;\ +char n, *tp = (char *) &bit32;\ +bit32.t = l;\ +n = tp[0]; tp[0] = tp[3]; tp[3] = n;\ +n = tp[1]; tp[1] = tp[2]; tp[2] = n;\ +l = bit32.t;\ +} + +#define SWAP2BYTES(s) {\ +struct { unsigned t :16; } bit16;\ +char n, *tp = (char *) &bit16;\ +bit16.t = s;\ +n = tp[0]; tp[0] = tp[1]; tp[1] = n;\ +s = bit16.t;\ +} + + +/** Private extern functions */ + +static unsigned char DndByteOrder (); + + +/***** Targets/Index stuff */ + +typedef struct { + int num_targets; + Atom *targets; +} DndTargetsTableEntryRec, * DndTargetsTableEntry; + +typedef struct { + int num_entries; + DndTargetsTableEntry entries; +} DndTargetsTableRec, * DndTargetsTable; + + +static ushort _DndIndexToTargets(Display * display, + int index, + Atom ** targets); + +extern void qt_x11_intern_atom(const char *, Atom *); + +///////////////////////////////////////////////////////////////// + +static unsigned char DndByteOrder () +{ + static unsigned char byte_order = 0; + + if (!byte_order) { + unsigned int endian = 1; + byte_order = (*((char *)&endian))?'l':'B'; + } + return byte_order ; +} + + + +static void DndReadSourceProperty(Display * dpy, + Window window, Atom dnd_selection, + Atom ** targets, unsigned short * num_targets) +{ + unsigned char *retval = 0; + Atom type ; + int format ; + unsigned long bytesafter, lengthRtn; + + if ((XGetWindowProperty (dpy, window, dnd_selection, 0L, 100000L, + False, ATOM(_MOTIF_DRAG_INITIATOR_INFO), &type, + &format, &lengthRtn, &bytesafter, + &retval) != Success) + || (type == XNone)) { + *num_targets = 0; + return ; + } + + DndSrcProp * src_prop = (DndSrcProp *)retval; + + if (src_prop->byte_order != DndByteOrder()) { + SWAP2BYTES(src_prop->target_index); + SWAP4BYTES(src_prop->selection); + } + + *num_targets = _DndIndexToTargets(dpy, src_prop->target_index, targets); + + XFree((char*)src_prop); +} + + +/* Position the _MOTIF_DRAG_RECEIVER_INFO property on the dropsite window. + Called by the receiver of the drop to indicate the + supported protocol style : dynamic, drop_only or none */ +static void DndWriteReceiverProperty(Display * dpy, Window window, + unsigned char protocol_style) +{ + DndReceiverProp receiver_prop; + + // squelch potential valgrind errors about uninitialized reads + memset(&receiver_prop, 0, sizeof(receiver_prop)); + + receiver_prop.byte_order = DndByteOrder() ; + receiver_prop.protocol_version = DND_PROTOCOL_VERSION; + receiver_prop.protocol_style = protocol_style ; + receiver_prop.proxy_window = XNone ; + receiver_prop.num_drop_sites = 0 ; + receiver_prop.total_size = sizeof(DndReceiverProp); + + /* write the buffer to the property */ + XChangeProperty (dpy, window, ATOM(_MOTIF_DRAG_RECEIVER_INFO), ATOM(_MOTIF_DRAG_RECEIVER_INFO), + 8, PropModeReplace, + (unsigned char *)&receiver_prop, + sizeof(DndReceiverProp)); +} + + +/* protocol style equiv (preregister stuff really) */ +#define DND_DRAG_DROP_ONLY_EQUIV 3 +#define DND_DRAG_DYNAMIC_EQUIV1 2 +#define DND_DRAG_DYNAMIC_EQUIV2 4 + + +/* Produce a client message to be sent by the caller */ +static void DndFillClientMessage(Display * dpy, Window window, + XClientMessageEvent *cm, + DndData * dnd_data, + char receiver) +{ + DndMessage * dnd_message = (DndMessage*)&cm->data.b[0] ; + + cm->display = dpy; + cm->type = ClientMessage; + cm->serial = LastKnownRequestProcessed(dpy); + cm->send_event = True; + cm->window = window; + cm->format = 8; + cm->message_type = ATOM(_MOTIF_DRAG_AND_DROP_MESSAGE); + + dnd_message->reason = dnd_data->reason | DND_SET_EVENT_TYPE(receiver); + + dnd_message->byte_order = DndByteOrder(); + + /* we're filling in flags with more stuff that necessary, + depending on the reason, but it doesn't matter */ + dnd_message->flags = 0 ; + dnd_message->flags |= DND_SET_STATUS(dnd_data->status) ; + dnd_message->flags |= DND_SET_OPERATION(dnd_data->operation) ; + dnd_message->flags |= DND_SET_OPERATIONS(dnd_data->operations) ; + dnd_message->flags |= DND_SET_COMPLETION(dnd_data->completion) ; + + dnd_message->time = dnd_data->time ; + + switch(dnd_data->reason) { + case DND_DROP_SITE_LEAVE: break ; + case DND_TOP_LEVEL_ENTER: + case DND_TOP_LEVEL_LEAVE: + dnd_message->data.top.src_window = dnd_data->src_window ; + dnd_message->data.top.property = dnd_data->property ; + break ; /* cannot fall through since the byte layout is different in + both set of messages, see top and pot union stuff */ + + case DND_DRAG_MOTION: + case DND_OPERATION_CHANGED: + case DND_DROP_SITE_ENTER: + case DND_DROP_START: + dnd_message->data.pot.x = dnd_data->x ; /* mouse position */ + dnd_message->data.pot.y = dnd_data->y ; + dnd_message->data.pot.src_window = dnd_data->src_window ; + dnd_message->data.pot.property = dnd_data->property ; + break ; + default: + break ; + } + +} + +static Bool DndParseClientMessage(XClientMessageEvent *cm, DndData * dnd_data, + char * receiver) +{ + DndMessage * dnd_message = (DndMessage*)&cm->data.b[0] ; + + if (cm->message_type != ATOM(_MOTIF_DRAG_AND_DROP_MESSAGE)) { + return False ; + } + + if (dnd_message->byte_order != DndByteOrder()) { + SWAP2BYTES(dnd_message->flags); + SWAP4BYTES(dnd_message->time); + } /* do the rest in the switch */ + + dnd_data->reason = dnd_message->reason ; + if (DND_GET_EVENT_TYPE(dnd_data->reason)) + *receiver = 1 ; + else + *receiver = 0 ; + dnd_data->reason &= DND_CLEAR_EVENT_TYPE ; + + dnd_data->time = dnd_message->time ; + + /* we're reading in more stuff that necessary. but who cares */ + dnd_data->status = DND_GET_STATUS(dnd_message->flags) ; + dnd_data->operation = DND_GET_OPERATION(dnd_message->flags) ; + dnd_data->operations = DND_GET_OPERATIONS(dnd_message->flags) ; + dnd_data->completion = DND_GET_COMPLETION(dnd_message->flags) ; + + switch(dnd_data->reason) { + case DND_TOP_LEVEL_ENTER: + case DND_TOP_LEVEL_LEAVE: + if (dnd_message->byte_order != DndByteOrder()) { + SWAP4BYTES(dnd_message->data.top.src_window); + SWAP4BYTES(dnd_message->data.top.property); + } + dnd_data->src_window = dnd_message->data.top.src_window ; + dnd_data->property = dnd_message->data.top.property ; + break ; /* cannot fall through, see above comment in write msg */ + + case DND_DRAG_MOTION: + case DND_OPERATION_CHANGED: + case DND_DROP_SITE_ENTER: + case DND_DROP_START: + if (dnd_message->byte_order != DndByteOrder()) { + SWAP2BYTES(dnd_message->data.pot.x); + SWAP2BYTES(dnd_message->data.pot.y); + SWAP4BYTES(dnd_message->data.pot.property); + SWAP4BYTES(dnd_message->data.pot.src_window); + } + dnd_data->x = dnd_message->data.pot.x ; + dnd_data->y = dnd_message->data.pot.y ; + dnd_data->property = dnd_message->data.pot.property ; + dnd_data->src_window = dnd_message->data.pot.src_window ; + break ; + + case DND_DROP_SITE_LEAVE: + break; + default: + break ; + } + + return True ; +} + + +static Window MotifWindow(Display *display) +{ + Atom type; + int format; + unsigned long size; + unsigned long bytes_after; + unsigned char *property = 0; + Window motif_window ; + + /* this version does no caching, so it's slow: round trip each time */ + + if ((XGetWindowProperty (display, RootWindow(display, 0), + ATOM(_MOTIF_DRAG_WINDOW), + 0L, 100000L, False, AnyPropertyType, + &type, &format, &size, &bytes_after, + &property) == Success) && + (type != XNone)) { + motif_window = *(Window *)property; + } else { + XSetWindowAttributes sAttributes; + + /* really, this should be done on a separate connection, + with XSetCloseDownMode (RetainPermanent), so that + others don't have to recreate it; hopefully, some real + Motif application will be around to do it */ + + sAttributes.override_redirect = True; + sAttributes.event_mask = PropertyChangeMask; + motif_window = XCreateWindow (display, + RootWindow (display, 0), + -170, -560, 1, 1, 0, 0, + InputOnly, CopyFromParent, + (CWOverrideRedirect |CWEventMask), + &sAttributes); + XMapWindow (display, motif_window); + } + + if (property) { + XFree ((char *)property); + } + + return (motif_window); +} + + +static DndTargetsTable TargetsTable(Display *display) +{ + Atom type; + int format; + unsigned long size; + unsigned long bytes_after; + Window motif_window = MotifWindow(display) ; + unsigned char *retval; + DndTargetsTable targets_table ; + int i,j ; + char * target_data ; + + /* this version does no caching, so it's slow: round trip each time */ + /* ideally, register for property notify on this target_list + atom and update when necessary only */ + + if ((XGetWindowProperty (display, motif_window, + ATOM(_MOTIF_DRAG_TARGETS), 0L, 100000L, + False, ATOM(_MOTIF_DRAG_TARGETS), + &type, &format, &size, &bytes_after, + &retval) != Success) || + type == XNone) { + qWarning("QMotifDND: Cannot get property on Motif window"); + return 0; + } + + DndTargets * target_prop = (DndTargets *)retval; + + if (target_prop->protocol_version != DND_PROTOCOL_VERSION) { + qWarning("QMotifDND: Protocol mismatch"); + } + + if (target_prop->byte_order != DndByteOrder()) { + /* need to swap num_target_lists and size */ + SWAP2BYTES(target_prop->num_target_lists); + SWAP4BYTES(target_prop->data_size); + } + + /* now parse DndTarget prop data in a TargetsTable */ + + targets_table = (DndTargetsTable)malloc(sizeof(DndTargetsTableRec)); + targets_table->num_entries = target_prop->num_target_lists ; + targets_table->entries = (DndTargetsTableEntry) + malloc(sizeof(DndTargetsTableEntryRec) * target_prop->num_target_lists); + + target_data = (char*)target_prop + sizeof(*target_prop) ; + + for (i = 0 ; i < targets_table->num_entries; i++) { + CARD16 num_targets ; + CARD32 atom ; + + memcpy(&num_targets, target_data, 2); + target_data += 2; + + /* potential swap needed here */ + if (target_prop->byte_order != DndByteOrder()) + SWAP2BYTES(num_targets); + + targets_table->entries[i].num_targets = num_targets ; + targets_table->entries[i].targets = (Atom *) + malloc(sizeof(Atom) * targets_table->entries[i].num_targets); + + + for (j = 0; j < num_targets; j++) { + memcpy(&atom, target_data, 4); + target_data += 4; + + /* another potential swap needed here */ + if (target_prop->byte_order != DndByteOrder()) + SWAP4BYTES(atom); + + targets_table->entries[i].targets[j] = (Atom) atom ; + } + } + + if (target_prop) { + XFree((char *)target_prop); + } + + return targets_table ; +} + + +static ushort _DndIndexToTargets(Display * display, + int index, + Atom ** targets) +{ + DndTargetsTable targets_table; + int i ; + + /* again, slow: no caching here, alloc/free each time */ + + if (!(targets_table = TargetsTable (display)) || + (index >= targets_table->num_entries)) { + if (targets_table) + XFree((char*)targets_table); + return 0; + } + + /* transfer the correct target list index */ + *targets = (Atom*)malloc(sizeof(Atom)*targets_table-> + entries[index].num_targets); + memcpy((char*)*targets, + (char*)targets_table->entries[index].targets, + sizeof(Atom)*targets_table->entries[index].num_targets); + + /* free the target table and its guts */ + for (i=0 ; i < targets_table->num_entries; i++) + XFree((char*)targets_table->entries[i].targets); + + int tmp = targets_table->entries[index].num_targets; + XFree((char*)targets_table); + + return tmp; // targets_table->entries[index].num_targets; +} + + +QByteArray QX11Data::motifdndFormat(int n) +{ + if (!motifdnd_active) + return 0; // should not happen + + if (n >= num_src_targets) + return 0; + + Atom target = src_targets[n]; + + if (target == XA_STRING) + return "text/plain;charset=ISO-8859-1"; + if (target == ATOM(UTF8_STRING)) + return "text/plain;charset=UTF-8"; + if (target == ATOM(COMPOUND_TEXT)) + return QByteArray("text/plain;charset=") + QTextCodec::codecForLocale()->name(); + if (target == ATOM(TEXT)) + return "text/plain"; + + return ("x-motif-dnd/" + X11->xdndAtomToString(target)); +} + + +QVariant QX11Data::motifdndObtainData(const char *mimeType) +{ + QByteArray result; + + if (Dnd_selection == 0 || !dropWidget) + return result; + + // try to convert the selection to the requested property + // qDebug("trying to convert to '%s'", mimeType); + + int n=0; + QByteArray f; + do { + f = motifdndFormat(n); + if (f.isEmpty()) + return result; + n++; + } while(qstricmp(mimeType, f.data())); + + Atom conversion_type = XNone; + if (f == "text/plain;charset=ISO-8859-1") { + conversion_type = XA_STRING; + } else if (f == "text/plain;charset=UTF-8") { + conversion_type = ATOM(UTF8_STRING); + } else if (f == (QByteArray("text/plain;charset=") + QTextCodec::codecForLocale()->name())) { + conversion_type = ATOM(COMPOUND_TEXT); + } else if (f == "text/plain") { + conversion_type = ATOM(TEXT); + } else if (f.startsWith("x-motif-dnd/")) { + // strip off the "x-motif-dnd/" prefix + conversion_type = X11->xdndStringToAtom(f.remove(0, 12)); + } + + if (XGetSelectionOwner(X11->display, Dnd_selection) == XNone) { + return result; // should never happen? + } + + QWidget* tw = dropWidget; + if ((dropWidget->windowType() == Qt::Desktop)) { + tw = new QWidget; + } + + // convert selection to the appropriate type + XConvertSelection (X11->display, Dnd_selection, conversion_type, + Dnd_selection, tw->internalWinId(), Dnd_selection_time); + + XFlush(X11->display); + + XEvent xevent; + bool got=X11->clipboardWaitForEvent(tw->internalWinId(), SelectionNotify, &xevent, 5000); + if (got) { + Atom type; + + if (X11->clipboardReadProperty(tw->internalWinId(), Dnd_selection, true, &result, 0, &type, 0)) { + } + } + + // we have to convert selection in order to indicate success to the initiator + XConvertSelection (X11->display, Dnd_selection, ATOM(XmTRANSFER_SUCCESS), + Dnd_selection, tw->internalWinId(), Dnd_selection_time); + + // wait again for SelectionNotify event + X11->clipboardWaitForEvent(tw->internalWinId(), SelectionNotify, &xevent, 5000); + + if ((dropWidget->windowType() == Qt::Desktop)) { + delete tw; + } + + return result; +} + + +void QX11Data::motifdndEnable(QWidget *widget, bool) +{ + DndWriteReceiverProperty(display, widget->internalWinId(), DND_DRAG_DYNAMIC); +} + + +void QX11Data::motifdndHandle(QWidget *widget, const XEvent * xe, bool /* passive */) +{ + XEvent event = *xe; + XClientMessageEvent cm ; + DndData dnd_data ; + char receiver ; + + if (!(DndParseClientMessage ((XClientMessageEvent*)&event, + &dnd_data, &receiver))) { + return; + } + + switch (dnd_data.reason) { + + case DND_DRAG_MOTION: + { + QPoint p = widget->mapFromGlobal(QPoint(dnd_data.x, dnd_data.y)); + QWidget *c = widget->childAt(p); + + if (!c || !c->acceptDrops()) { + // not over a drop site + if (dropWidget) { + QDragLeaveEvent dragLeaveEvent; + QApplication::sendEvent(dropWidget, &dragLeaveEvent); + + dropWidget = 0; + lastAcceptedAction = Qt::IgnoreAction; + + dnd_data.reason = DND_DROP_SITE_LEAVE; + dnd_data.time = X11->time; + DndFillClientMessage (event.xclient.display, sourceWindow, &cm, &dnd_data, receiver); + XSendEvent(event.xbutton.display, sourceWindow, False, 0, (XEvent *)&cm) ; + } else { + dnd_data.reason = DND_DRAG_MOTION; + dnd_data.status = DND_NO_DROP_SITE; + dnd_data.time = X11->time; + dnd_data.operation = DND_NOOP; + dnd_data.operations = DND_NOOP; + DndFillClientMessage (event.xclient.display, sourceWindow, &cm, &dnd_data, receiver); + XSendEvent(event.xbutton.display, sourceWindow, False, 0, (XEvent *)&cm) ; + } + } else { + Q_ASSERT(c != 0); + p = c->mapFrom(widget, p); + + if (dropWidget != c) { + if (dropWidget) { + QDragLeaveEvent le; + QApplication::sendEvent(dropWidget, &le); + } + + dropWidget = c; + lastAcceptedAction = Qt::IgnoreAction; + + const Qt::DropActions possibleActions = + DndOperationsToQtDropActions(dnd_data.operations); + QDragEnterEvent de(p, possibleActions, QDragManager::self()->dropData, + QApplication::mouseButtons(), QApplication::keyboardModifiers()); + QApplication::sendEvent(dropWidget, &de); + + dnd_data.reason = DND_DROP_SITE_ENTER; + dnd_data.time = X11->time; + if (de.isAccepted()) { + lastAcceptedAction = de.dropAction(); + + dnd_data.status = DND_VALID_DROP_SITE; + dnd_data.operation = QtDropActionToDndOperation(lastAcceptedAction); + } else { + dnd_data.status = DND_INVALID_DROP_SITE; + dnd_data.operation = DND_NOOP; + dnd_data.operations = DND_NOOP; + } + DndFillClientMessage (event.xclient.display, sourceWindow, &cm, &dnd_data, receiver); + XSendEvent(event.xbutton.display, sourceWindow, False, 0, (XEvent *)&cm); + } else { + const Qt::DropActions possibleActions = + DndOperationsToQtDropActions(dnd_data.operations); + QDragMoveEvent me(p, possibleActions, QDragManager::self()->dropData, + QApplication::mouseButtons(), QApplication::keyboardModifiers()); + if (lastAcceptedAction != Qt::IgnoreAction) { + me.setDropAction(lastAcceptedAction); + me.accept(); + } + QApplication::sendEvent(dropWidget, &me); + + dnd_data.reason = DND_DRAG_MOTION; + dnd_data.time = X11->time; + + if (me.isAccepted()) { + lastAcceptedAction = me.dropAction(); + + dnd_data.status = DND_VALID_DROP_SITE; + dnd_data.operation = QtDropActionToDndOperation(lastAcceptedAction); + } else { + dnd_data.status = DND_INVALID_DROP_SITE; + dnd_data.operation = DND_NOOP; + dnd_data.operations = DND_NOOP; + } + + DndFillClientMessage (event.xclient.display, sourceWindow, &cm, &dnd_data, receiver); + XSendEvent(event.xbutton.display, sourceWindow, False, 0, (XEvent *)&cm); + } + } + + break; + } + + case DND_TOP_LEVEL_ENTER: + { + /* get the size of our drop site for later use */ + + motifdnd_active = true; + sourceWindow = dnd_data.src_window; + + /* no answer needed, just read source property */ + DndReadSourceProperty (event.xclient.display, + sourceWindow, + dnd_data.property, + &src_targets, &num_src_targets); + + break; + } + + case DND_TOP_LEVEL_LEAVE: + { + XEvent nextEvent; + if (XCheckTypedWindowEvent(X11->display, widget->winId(), ClientMessage, &nextEvent)) { + // we just want to check, not eat (should use XPeekIfEvent) + XPutBackEvent(X11->display, &nextEvent); + + if (DndParseClientMessage (&nextEvent.xclient, &dnd_data, &receiver) + && dnd_data.reason == DND_DROP_START) { + // expecting drop next, keeping DnD alive + break; + } + } + + // not expecting drop, need to send drag leave events and such here + if (dropWidget) { + QDragLeaveEvent le; + QApplication::sendEvent(dropWidget, &le); + } + + sourceWindow = XNone; + dropWidget = 0; + lastAcceptedAction = Qt::IgnoreAction; + + motifdnd_active = false; + + break; + } + + case DND_OPERATION_CHANGED: + // ### need to echo + break; + + case DND_DROP_START: + { + Q_ASSERT(motifdnd_active); + Q_ASSERT(sourceWindow == dnd_data.src_window); + + if (!dropWidget || lastAcceptedAction == Qt::IgnoreAction) { + // echo DROP_START + dnd_data.reason = DND_DROP_START; + dnd_data.status = DND_NO_DROP_SITE; + dnd_data.operation = DND_NOOP; + dnd_data.operations = DND_NOOP; + DndFillClientMessage (event.xclient.display, sourceWindow, &cm, &dnd_data, 0); + XSendEvent(event.xbutton.display, sourceWindow, False, 0, (XEvent *)&cm); + + // we have to convert selection in order to indicate failure to the initiator + XConvertSelection (X11->display, dnd_data.property, ATOM(XmTRANSFER_FAILURE), + dnd_data.property, dnd_data.src_window, dnd_data.time); + + if (dropWidget) { + QDragLeaveEvent e; + QApplication::sendEvent(dropWidget, &e); + } + + motifdnd_active = false; + sourceWindow = XNone; + dropWidget = 0; + lastAcceptedAction = Qt::IgnoreAction; + + return; + } + + // store selection and its time + Dnd_selection = dnd_data.property; + Dnd_selection_time = dnd_data.time; + + QPoint p(dnd_data.x, dnd_data.y); + QDropEvent de(dropWidget->mapFromGlobal(p), Qt::CopyAction, QDragManager::self()->dropData, + QApplication::mouseButtons(), QApplication::keyboardModifiers()); + if (lastAcceptedAction != Qt::IgnoreAction) { + de.setDropAction(lastAcceptedAction); + de.accept(); + } + QApplication::sendEvent(dropWidget, &de); + + // reset + Dnd_selection = XNone; + Dnd_selection_time = 0; + + // echo DROP_START depending on the result of the dropEvent + if (de.isAccepted()) { + dnd_data.reason = DND_DROP_START; + dnd_data.status = DND_VALID_DROP_SITE; + dnd_data.operation = QtDropActionToDndOperation(de.dropAction()); + } else { + dnd_data.reason = DND_DROP_START; + dnd_data.status = DND_NO_DROP_SITE; + dnd_data.operation = DND_NOOP; + dnd_data.operations = DND_NOOP; + } + DndFillClientMessage (event.xclient.display, sourceWindow, &cm, &dnd_data, 0); + XSendEvent(event.xbutton.display, sourceWindow, False, 0, (XEvent *)&cm); + + sourceWindow = XNone; + dropWidget = 0; + lastAcceptedAction = Qt::IgnoreAction; + + motifdnd_active = false; + + break; + } + + default: + break; + } // end of switch (dnd_data.reason) +} + +QT_END_NAMESPACE + +#endif // QT_NO_DRAGANDDROP |