bool QClipboard::event(QEvent *e)
{
if (e->type() != QEvent::Clipboard)
return QObject::event(e);
QClipboardData *d = clipboardData();
MSG *m = (MSG *)((QClipboardEvent*)e)->data();
if (!m) {
// this is sent to render all formats at app shut down
if (ownsClipboard()) {
OleFlushClipboard();
d->releaseIData();
}
return true;
}
bool propagate = false;
if (m->message == WM_CHANGECBCHAIN) {
if ((HWND)m->wParam == d->nextClipboardViewer)
d->nextClipboardViewer = (HWND)m->lParam;
else
propagate = true;
} else if (m->message == WM_DRAWCLIPBOARD) {
emitChanged(QClipboard::Clipboard);
if (!ownsClipboard() && d->iData)
// clean up the clipboard object if we no longer own the clipboard
d->releaseIData();
propagate = true;
}
if (propagate && d->nextClipboardViewer) {
if (ptrIsHungAppWindow == 0) {
QSystemLibrary library(QLatin1String("User32"));
ptrIsHungAppWindow = (PtrIsHungAppWindow)library.resolve("IsHungAppWindow");
}
if (ptrIsHungAppWindow && ptrIsHungAppWindow(d->nextClipboardViewer)) {
qWarning("%s: Cowardly refusing to send clipboard message to hung application...", Q_FUNC_INFO);
} else if (isProcessBeingDebugged(d->nextClipboardViewer)) {
// Also refuse if the process is being debugged, specifically, if it is
// displaying a runtime assert, which is not caught by isHungAppWindow().
qWarning("%s: Cowardly refusing to send clipboard message to application under debugger...", Q_FUNC_INFO);
} else {
SendMessage(d->nextClipboardViewer, m->message, m->wParam, m->lParam);
}
}
return true;
}
bool QWindowsClipboard::ownsMode(QClipboard::Mode mode) const
{
const bool result = mode == QClipboard::Clipboard ?
ownsClipboard() : false;
qCDebug(lcQpaMime) << __FUNCTION__ << mode << result;
return result;
}
bool QWindowsClipboard::ownsMode(QClipboard::Mode mode) const
{
const bool result = mode == QClipboard::Clipboard ?
ownsClipboard() : false;
if (QWindowsContext::verboseOLE)
qDebug("%s %d returns %d", __FUNCTION__, mode, result);
return result;
}
QMimeData *QWindowsClipboard::mimeData(QClipboard::Mode mode)
{
qCDebug(lcQpaMime) << __FUNCTION__ << mode;
if (mode != QClipboard::Clipboard)
return 0;
if (ownsClipboard())
return m_data->mimeData();
return &m_retrievalData;
}
QMimeData *QWindowsClipboard::mimeData(QClipboard::Mode mode)
{
if (QWindowsContext::verboseOLE)
qDebug() << __FUNCTION__ << mode;
if (mode != QClipboard::Clipboard)
return 0;
if (ownsClipboard())
return m_data->mimeData();
return &m_retrievalData;
}
const QMimeData *QClipboard::mimeData(Mode mode) const
{
if (mode != Clipboard)
return 0;
QClipboardData *data = clipboardData();
// sort cut for local copy / paste
if (ownsClipboard() && data->iData->mimeData())
return data->iData->mimeData();
return &data->watcher;
}
bool QWindowsClipboard::clipboardViewerWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam, LRESULT *result)
{
enum { wMClipboardUpdate = 0x031D };
*result = 0;
if (QWindowsContext::verbose)
qCDebug(lcQpaMime) << __FUNCTION__ << hwnd << message << QWindowsGuiEventDispatcher::windowsMessageName(message);
switch (message) {
case WM_CHANGECBCHAIN: {
const HWND toBeRemoved = (HWND)wParam;
if (toBeRemoved == m_nextClipboardViewer) {
m_nextClipboardViewer = (HWND)lParam;
} else {
propagateClipboardMessage(message, wParam, lParam);
}
}
return true;
case wMClipboardUpdate: // Clipboard Format listener (Vista onwards)
case WM_DRAWCLIPBOARD: { // Clipboard Viewer Chain handling (up to XP)
const bool owned = ownsClipboard();
qCDebug(lcQpaMime) << "Clipboard changed owned " << owned;
emitChanged(QClipboard::Clipboard);
// clean up the clipboard object if we no longer own the clipboard
if (!owned && m_data)
releaseIData();
if (!m_formatListenerRegistered)
propagateClipboardMessage(message, wParam, lParam);
}
return true;
case WM_DESTROY:
// Recommended shutdown
if (ownsClipboard()) {
qCDebug(lcQpaMime) << "Clipboard owner on shutdown, releasing.";
OleFlushClipboard();
releaseIData();
}
return true;
} // switch (message)
return false;
}
bool QWindowsClipboard::clipboardViewerWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam, LRESULT *result)
{
*result = 0;
if (QWindowsContext::verboseOLE)
qDebug("%s HWND=%p 0x%x %s", __FUNCTION__, hwnd, message,
QWindowsGuiEventDispatcher::windowsMessageName(message));
switch (message) {
case WM_CHANGECBCHAIN: {
const HWND toBeRemoved = (HWND)wParam;
if (toBeRemoved == m_nextClipboardViewer) {
m_nextClipboardViewer = (HWND)lParam;
} else {
propagateClipboardMessage(message, wParam, lParam);
}
}
return true;
case WM_DRAWCLIPBOARD: {
const bool owned = ownsClipboard();
if (QWindowsContext::verboseOLE)
qDebug("Clipboard changed owned %d", owned);
emitChanged(QClipboard::Clipboard);
// clean up the clipboard object if we no longer own the clipboard
if (!owned && m_data)
releaseIData();
propagateClipboardMessage(message, wParam, lParam);
}
return true;
case WM_DESTROY:
// Recommended shutdown
if (ownsClipboard()) {
if (QWindowsContext::verboseOLE)
qDebug("Clipboard owner on shutdown, releasing.");
OleFlushClipboard();
releaseIData();
}
return true;
} // switch (message)
return false;
}
bool QClipboard::event(QEvent *e)
{
if (e->type() != QEvent::Clipboard)
return QObject::event(e);
QClipboardData *d = clipboardData();
MSG *m = (MSG *)((QClipboardEvent*)e)->data();
if (!m) {
// this is sent to render all formats at app shut down
if (ownsClipboard()) {
OleFlushClipboard();
d->releaseIData();
}
return true;
}
bool propagate = false;
if (m->message == WM_CHANGECBCHAIN) {
if ((HWND)m->wParam == d->nextClipboardViewer)
d->nextClipboardViewer = (HWND)m->lParam;
else
propagate = true;
} else if (m->message == WM_DRAWCLIPBOARD) {
emitChanged(QClipboard::Clipboard);
if (!ownsClipboard() && d->iData)
// clean up the clipboard object if we no longer own the clipboard
d->releaseIData();
propagate = true;
}
if (propagate && d->nextClipboardViewer) {
SendMessage(d->nextClipboardViewer, m->message, m->wParam, m->lParam);
}
return true;
}
