diff options
Diffstat (limited to 'src/plugins/platforms/xlib/qxlibclipboard.cpp')
| -rw-r--r-- | src/plugins/platforms/xlib/qxlibclipboard.cpp | 677 |
1 files changed, 677 insertions, 0 deletions
diff --git a/src/plugins/platforms/xlib/qxlibclipboard.cpp b/src/plugins/platforms/xlib/qxlibclipboard.cpp new file mode 100644 index 0000000000..dfaf552121 --- /dev/null +++ b/src/plugins/platforms/xlib/qxlibclipboard.cpp @@ -0,0 +1,677 @@ +/**************************************************************************** +** +** 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 plugins 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qxlibclipboard.h" + +#include "qxlibscreen.h" +#include "qxlibmime.h" +#include "qxlibdisplay.h" + +#include <private/qapplication_p.h> + +#include <QtCore/QDebug> + +class QXlibClipboardMime : public QXlibMime +{ + Q_OBJECT +public: + QXlibClipboardMime(QClipboard::Mode mode, QXlibClipboard *clipboard) + : QXlibMime() + , m_clipboard(clipboard) + { + switch (mode) { + case QClipboard::Selection: + modeAtom = XA_PRIMARY; + break; + + case QClipboard::Clipboard: + modeAtom = QXlibStatic::atom(QXlibStatic::CLIPBOARD); + break; + + default: + qWarning("QTestLiteMime: Internal error: Unsupported clipboard mode"); + break; + } + } + +protected: + QStringList formats_sys() const + { + if (empty()) + return QStringList(); + + if (!formatList.count()) { + QXlibClipboardMime *that = const_cast<QXlibClipboardMime *>(this); + // get the list of targets from the current clipboard owner - we do this + // once so that multiple calls to this function don't require multiple + // server round trips... + that->format_atoms = m_clipboard->getDataInFormat(modeAtom,QXlibStatic::atom(QXlibStatic::TARGETS)); + + if (format_atoms.size() > 0) { + Atom *targets = (Atom *) format_atoms.data(); + int size = format_atoms.size() / sizeof(Atom); + + for (int i = 0; i < size; ++i) { + if (targets[i] == 0) + continue; + + QStringList formatsForAtom = mimeFormatsForAtom(m_clipboard->screen()->display()->nativeDisplay(),targets[i]); + for (int j = 0; j < formatsForAtom.size(); ++j) { + if (!formatList.contains(formatsForAtom.at(j))) + that->formatList.append(formatsForAtom.at(j)); + } + } + } + } + + return formatList; + } + + bool hasFormat_sys(const QString &format) const + { + QStringList list = formats(); + return list.contains(format); + } + + QVariant retrieveData_sys(const QString &fmt, QVariant::Type requestedType) const + { + if (fmt.isEmpty() || empty()) + return QByteArray(); + + (void)formats(); // trigger update of format list + + QList<Atom> atoms; + Atom *targets = (Atom *) format_atoms.data(); + int size = format_atoms.size() / sizeof(Atom); + for (int i = 0; i < size; ++i) + atoms.append(targets[i]); + + QByteArray encoding; + Atom fmtatom = mimeAtomForFormat(m_clipboard->screen()->display()->nativeDisplay(),fmt, requestedType, atoms, &encoding); + + if (fmtatom == 0) + return QVariant(); + + return mimeConvertToFormat(m_clipboard->screen()->display()->nativeDisplay(),fmtatom, m_clipboard->getDataInFormat(modeAtom,fmtatom), fmt, requestedType, encoding); + } +private: + bool empty() const + { + Window win = XGetSelectionOwner(m_clipboard->screen()->display()->nativeDisplay(), modeAtom); + + return win == XNone; + } + + + Atom modeAtom; + QXlibClipboard *m_clipboard; + QStringList formatList; + QByteArray format_atoms; +}; + +const int QXlibClipboard::clipboard_timeout = 5000; + +QXlibClipboard::QXlibClipboard(QXlibScreen *screen) + : QPlatformClipboard() + , m_screen(screen) + , m_xClipboard(0) + , m_clientClipboard(0) + , m_xSelection(0) + , m_clientSelection(0) + , m_requestor(XNone) + , m_owner(XNone) +{ +} + +const QMimeData * QXlibClipboard::mimeData(QClipboard::Mode mode) const +{ + if (mode == QClipboard::Clipboard) { + if (!m_xClipboard) { + QXlibClipboard *that = const_cast<QXlibClipboard *>(this); + that->m_xClipboard = new QXlibClipboardMime(mode,that); + } + Window clipboardOwner = XGetSelectionOwner(screen()->display()->nativeDisplay(),QXlibStatic::atom(QXlibStatic::CLIPBOARD)); + if (clipboardOwner == owner()) { + return m_clientClipboard; + } else { + return m_xClipboard; + } + } else if (mode == QClipboard::Selection) { + if (!m_xSelection) { + QXlibClipboard *that = const_cast<QXlibClipboard *>(this); + that->m_xSelection = new QXlibClipboardMime(mode,that); + } + Window clipboardOwner = XGetSelectionOwner(screen()->display()->nativeDisplay(),XA_PRIMARY); + if (clipboardOwner == owner()) { + return m_clientSelection; + } else { + return m_xSelection; + } + } + return 0; +} + +void QXlibClipboard::setMimeData(QMimeData *data, QClipboard::Mode mode) +{ + Atom modeAtom; + QMimeData **d; + switch (mode) { + case QClipboard::Selection: + modeAtom = XA_PRIMARY; + d = &m_clientSelection; + break; + + case QClipboard::Clipboard: + modeAtom = QXlibStatic::atom(QXlibStatic::CLIPBOARD); + d = &m_clientClipboard; + break; + + default: + qWarning("QClipboard::setMimeData: unsupported mode '%d'", mode); + return; + } + + Window newOwner; + + if (! data) { // no data, clear clipboard contents + newOwner = XNone; + } else { + newOwner = owner(); + + *d = data; + } + + XSetSelectionOwner(m_screen->display()->nativeDisplay(), modeAtom, newOwner, CurrentTime); + + if (XGetSelectionOwner(m_screen->display()->nativeDisplay(), modeAtom) != newOwner) { + qWarning("QClipboard::setData: Cannot set X11 selection owner"); + } + +} + +bool QXlibClipboard::supportsMode(QClipboard::Mode mode) const +{ + if (mode == QClipboard::Clipboard || mode == QClipboard::Selection) + return true; + return false; +} + + +QXlibScreen * QXlibClipboard::screen() const +{ + return m_screen; +} + +Window QXlibClipboard::requestor() const +{ + if (!m_requestor) { + int x = 0, y = 0, w = 3, h = 3; + QXlibClipboard *that = const_cast<QXlibClipboard *>(this); + Window window = XCreateSimpleWindow(m_screen->display()->nativeDisplay(), m_screen->rootWindow(), + x, y, w, h, 0 /*border_width*/, + m_screen->blackPixel(), m_screen->whitePixel()); + that->setRequestor(window); + } + return m_requestor; +} + +void QXlibClipboard::setRequestor(Window window) +{ + if (m_requestor != XNone) { + XDestroyWindow(m_screen->display()->nativeDisplay(),m_requestor); + } + m_requestor = window; +} + +Window QXlibClipboard::owner() const +{ + if (!m_owner) { + int x = 0, y = 0, w = 3, h = 3; + QXlibClipboard *that = const_cast<QXlibClipboard *>(this); + Window window = XCreateSimpleWindow(m_screen->display()->nativeDisplay(), m_screen->rootWindow(), + x, y, w, h, 0 /*border_width*/, + m_screen->blackPixel(), m_screen->whitePixel()); + that->setOwner(window); + } + return m_owner; +} + +void QXlibClipboard::setOwner(Window window) +{ + if (m_owner != XNone){ + XDestroyWindow(m_screen->display()->nativeDisplay(),m_owner); + } + m_owner = window; +} + +Atom QXlibClipboard::sendTargetsSelection(QMimeData *d, Window window, Atom property) +{ + QVector<Atom> types; + QStringList formats = QInternalMimeData::formatsHelper(d); + for (int i = 0; i < formats.size(); ++i) { + QList<Atom> atoms = QXlibMime::mimeAtomsForFormat(screen()->display()->nativeDisplay(),formats.at(i)); + for (int j = 0; j < atoms.size(); ++j) { + if (!types.contains(atoms.at(j))) + types.append(atoms.at(j)); + } + } + types.append(QXlibStatic::atom(QXlibStatic::TARGETS)); + types.append(QXlibStatic::atom(QXlibStatic::MULTIPLE)); + types.append(QXlibStatic::atom(QXlibStatic::TIMESTAMP)); + types.append(QXlibStatic::atom(QXlibStatic::SAVE_TARGETS)); + + XChangeProperty(screen()->display()->nativeDisplay(), window, property, XA_ATOM, 32, + PropModeReplace, (uchar *) types.data(), types.size()); + return property; +} + +Atom QXlibClipboard::sendSelection(QMimeData *d, Atom target, Window window, Atom property) +{ + Atom atomFormat = target; + int dataFormat = 0; + QByteArray data; + + QString fmt = QXlibMime::mimeAtomToString(screen()->display()->nativeDisplay(), target); + if (fmt.isEmpty()) { // Not a MIME type we have + qDebug() << "QClipboard: send_selection(): converting to type '%s' is not supported" << fmt.data(); + return XNone; + } + qDebug() << "QClipboard: send_selection(): converting to type '%s'" << fmt.data(); + + if (QXlibMime::mimeDataForAtom(screen()->display()->nativeDisplay(),target, d, &data, &atomFormat, &dataFormat)) { + + // don't allow INCR transfers when using MULTIPLE or to + // Motif clients (since Motif doesn't support INCR) + static Atom motif_clip_temporary = QXlibStatic::atom(QXlibStatic::CLIP_TEMPORARY); + bool allow_incr = property != motif_clip_temporary; + + // X_ChangeProperty protocol request is 24 bytes + const int increment = (XMaxRequestSize(screen()->display()->nativeDisplay()) * 4) - 24; + if (data.size() > increment && allow_incr) { + long bytes = data.size(); + XChangeProperty(screen()->display()->nativeDisplay(), window, property, + QXlibStatic::atom(QXlibStatic::INCR), 32, PropModeReplace, (uchar *) &bytes, 1); + +// (void)new QClipboardINCRTransaction(window, property, atomFormat, dataFormat, data, increment); + qDebug() << "not implemented INCRT just YET!"; + return property; + } + + // make sure we can perform the XChangeProperty in a single request + if (data.size() > increment) + return XNone; // ### perhaps use several XChangeProperty calls w/ PropModeAppend? + int dataSize = data.size() / (dataFormat / 8); + // use a single request to transfer data + XChangeProperty(screen()->display()->nativeDisplay(), window, property, atomFormat, + dataFormat, PropModeReplace, (uchar *) data.data(), + dataSize); + } + return property; +} + +void QXlibClipboard::handleSelectionRequest(XEvent *xevent) +{ + XSelectionRequestEvent *req = &xevent->xselectionrequest; + + if (requestor() && req->requestor == requestor()) { + qDebug() << "This should be caught before"; + return; + } + + XEvent event; + event.xselection.type = SelectionNotify; + event.xselection.display = req->display; + event.xselection.requestor = req->requestor; + event.xselection.selection = req->selection; + event.xselection.target = req->target; + event.xselection.property = XNone; + event.xselection.time = req->time; + + QMimeData *d; + if (req->selection == XA_PRIMARY) { + d = m_clientSelection; + } else if (req->selection == QXlibStatic::atom(QXlibStatic::CLIPBOARD)) { + d = m_clientClipboard; + } else { + qWarning("QClipboard: Unknown selection '%lx'", req->selection); + XSendEvent(screen()->display()->nativeDisplay(), req->requestor, False, NoEventMask, &event); + return; + } + + if (!d) { + qWarning("QClipboard: Cannot transfer data, no data available"); + XSendEvent(screen()->display()->nativeDisplay(), req->requestor, False, NoEventMask, &event); + return; + } + + Atom xa_targets = QXlibStatic::atom(QXlibStatic::TARGETS); + Atom xa_multiple = QXlibStatic::atom(QXlibStatic::MULTIPLE); + Atom xa_timestamp = QXlibStatic::atom(QXlibStatic::TIMESTAMP); + + struct AtomPair { Atom target; Atom property; } *multi = 0; + Atom multi_type = XNone; + int multi_format = 0; + int nmulti = 0; + int imulti = -1; + bool multi_writeback = false; + + if (req->target == xa_multiple) { + QByteArray multi_data; + if (req->property == XNone + || !clipboardReadProperty(req->requestor, req->property, false, &multi_data, + 0, &multi_type, &multi_format) + || multi_format != 32) { + // MULTIPLE property not formatted correctly + XSendEvent(screen()->display()->nativeDisplay(), req->requestor, False, NoEventMask, &event); + return; + } + nmulti = multi_data.size()/sizeof(*multi); + multi = new AtomPair[nmulti]; + memcpy(multi,multi_data.data(),multi_data.size()); + imulti = 0; + } + + for (; imulti < nmulti; ++imulti) { + Atom target; + Atom property; + + if (multi) { + target = multi[imulti].target; + property = multi[imulti].property; + } else { + target = req->target; + property = req->property; + if (property == XNone) // obsolete client + property = target; + } + + Atom ret = XNone; + if (target == XNone || property == XNone) { + ; + } else if (target == xa_timestamp) { +// if (d->timestamp != CurrentTime) { +// XChangeProperty(screen()->display()->nativeDisplay(), req->requestor, property, XA_INTEGER, 32, +// PropModeReplace, CurrentTime, 1); +// ret = property; +// } else { +// qWarning("QClipboard: Invalid data timestamp"); +// } + } else if (target == xa_targets) { + ret = sendTargetsSelection(d, req->requestor, property); + } else { + ret = sendSelection(d, target, req->requestor, property); + } + + if (nmulti > 0) { + if (ret == XNone) { + multi[imulti].property = XNone; + multi_writeback = true; + } + } else { + event.xselection.property = ret; + break; + } + } + + if (nmulti > 0) { + if (multi_writeback) { + // according to ICCCM 2.6.2 says to put None back + // into the original property on the requestor window + XChangeProperty(screen()->display()->nativeDisplay(), req->requestor, req->property, multi_type, 32, + PropModeReplace, (uchar *) multi, nmulti * 2); + } + + delete [] multi; + event.xselection.property = req->property; + } + + // send selection notify to requestor + XSendEvent(screen()->display()->nativeDisplay(), req->requestor, False, NoEventMask, &event); +} + +static inline int maxSelectionIncr(Display *dpy) +{ return XMaxRequestSize(dpy) > 65536 ? 65536*4 : XMaxRequestSize(dpy)*4 - 100; } + +bool QXlibClipboard::clipboardReadProperty(Window win, Atom property, bool deleteProperty, QByteArray *buffer, int *size, Atom *type, int *format) const +{ + int maxsize = maxSelectionIncr(screen()->display()->nativeDisplay()); + ulong bytes_left; // bytes_after + ulong length; // nitems + uchar *data; + Atom dummy_type; + int dummy_format; + int r; + + if (!type) // allow null args + type = &dummy_type; + if (!format) + format = &dummy_format; + + // Don't read anything, just get the size of the property data + r = XGetWindowProperty(screen()->display()->nativeDisplay(), win, property, 0, 0, False, + AnyPropertyType, type, format, + &length, &bytes_left, &data); + if (r != Success || (type && *type == XNone)) { + buffer->resize(0); + return false; + } + XFree((char*)data); + + int offset = 0, buffer_offset = 0, format_inc = 1, proplen = bytes_left; + + switch (*format) { + case 8: + default: + format_inc = sizeof(char) / 1; + break; + + case 16: + format_inc = sizeof(short) / 2; + proplen *= sizeof(short) / 2; + break; + + case 32: + format_inc = sizeof(long) / 4; + proplen *= sizeof(long) / 4; + break; + } + + int newSize = proplen; + buffer->resize(newSize); + + bool ok = (buffer->size() == newSize); + + if (ok && newSize) { + // could allocate buffer + + while (bytes_left) { + // more to read... + + r = XGetWindowProperty(screen()->display()->nativeDisplay(), win, property, offset, maxsize/4, + False, AnyPropertyType, type, format, + &length, &bytes_left, &data); + if (r != Success || (type && *type == XNone)) + break; + + offset += length / (32 / *format); + length *= format_inc * (*format) / 8; + + // Here we check if we get a buffer overflow and tries to + // recover -- this shouldn't normally happen, but it doesn't + // hurt to be defensive + if ((int)(buffer_offset + length) > buffer->size()) { + length = buffer->size() - buffer_offset; + + // escape loop + bytes_left = 0; + } + + memcpy(buffer->data() + buffer_offset, data, length); + buffer_offset += length; + + XFree((char*)data); + } + + if (*format == 8 && *type == QXlibStatic::atom(QXlibStatic::COMPOUND_TEXT)) { + // convert COMPOUND_TEXT to a multibyte string + XTextProperty textprop; + textprop.encoding = *type; + textprop.format = *format; + textprop.nitems = buffer_offset; + textprop.value = (unsigned char *) buffer->data(); + + char **list_ret = 0; + int count; + if (XmbTextPropertyToTextList(screen()->display()->nativeDisplay(), &textprop, &list_ret, + &count) == Success && count && list_ret) { + offset = buffer_offset = strlen(list_ret[0]); + buffer->resize(offset); + memcpy(buffer->data(), list_ret[0], offset); + } + if (list_ret) XFreeStringList(list_ret); + } + } + + // correct size, not 0-term. + if (size) + *size = buffer_offset; + + if (deleteProperty) + XDeleteProperty(screen()->display()->nativeDisplay(), win, property); + + screen()->display()->flush(); + + return ok; +} + +QByteArray QXlibClipboard::clipboardReadIncrementalProperty(Window win, Atom property, int nbytes, bool nullterm) +{ + XEvent event; + + QByteArray buf; + QByteArray tmp_buf; + bool alloc_error = false; + int length; + int offset = 0; + + if (nbytes > 0) { + // Reserve buffer + zero-terminator (for text data) + // We want to complete the INCR transfer even if we cannot + // allocate more memory + buf.resize(nbytes+1); + alloc_error = buf.size() != nbytes+1; + } + + for (;;) { + screen()->display()->flush(); + if (!screen()->waitForClipboardEvent(win,PropertyNotify,&event,clipboard_timeout)) + break; + if (event.xproperty.atom != property || + event.xproperty.state != PropertyNewValue) + continue; + if (clipboardReadProperty(win, property, true, &tmp_buf, &length, 0, 0)) { + if (length == 0) { // no more data, we're done + if (nullterm) { + buf.resize(offset+1); + buf[offset] = '\0'; + } else { + buf.resize(offset); + } + return buf; + } else if (!alloc_error) { + if (offset+length > (int)buf.size()) { + buf.resize(offset+length+65535); + if (buf.size() != offset+length+65535) { + alloc_error = true; + length = buf.size() - offset; + } + } + memcpy(buf.data()+offset, tmp_buf.constData(), length); + tmp_buf.resize(0); + offset += length; + } + } else { + break; + } + } + + // timed out ... create a new requestor window, otherwise the requestor + // could consider next request to be still part of this timed out request + setRequestor(0); + + return QByteArray(); +} + +QByteArray QXlibClipboard::getDataInFormat(Atom modeAtom, Atom fmtatom) +{ + QByteArray buf; + + Window win = requestor(); + + XSelectInput(screen()->display()->nativeDisplay(), win, NoEventMask); // don't listen for any events + + XDeleteProperty(screen()->display()->nativeDisplay(), win, QXlibStatic::atom(QXlibStatic::_QT_SELECTION)); + XConvertSelection(screen()->display()->nativeDisplay(), modeAtom, fmtatom, QXlibStatic::atom(QXlibStatic::_QT_SELECTION), win, CurrentTime); + screen()->display()->sync(); + + XEvent xevent; + if (!screen()->waitForClipboardEvent(win,SelectionNotify,&xevent,clipboard_timeout) || + xevent.xselection.property == XNone) { + return buf; + } + + Atom type; + XSelectInput(screen()->display()->nativeDisplay(), win, PropertyChangeMask); + + if (clipboardReadProperty(win, QXlibStatic::atom(QXlibStatic::_QT_SELECTION), true, &buf, 0, &type, 0)) { + if (type == QXlibStatic::atom(QXlibStatic::INCR)) { + int nbytes = buf.size() >= 4 ? *((int*)buf.data()) : 0; + buf = clipboardReadIncrementalProperty(win, QXlibStatic::atom(QXlibStatic::_QT_SELECTION), nbytes, false); + } + } + + XSelectInput(screen()->display()->nativeDisplay(), win, NoEventMask); + + + return buf; +} + +#include "qxlibclipboard.moc" |