Qt-ify the QtCompositor module

Currently the QtCompositor library and API do not follow the Qt API
naming conventions.  This commit intends to fix these inconsistencies.

filenames start with q
headers containing private API's end in _p
public API classes begin with Q
use the qt namespace macros where necessary

Wayland namespace is now QtWayland
wayland_wrapper classes are now private API's

It's important to make these changes not just for stylistic reasons, but
also because when qmake builds the module in checks for these
conventions to determine how to deploy the include files.

Change-Id: I8bfadeceda92a0f52cb73c704551da75540e7587
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

1 files changed, 308 insertions, 0 deletions

diff --git a/src/compositor/wayland_wrapper/qwldatadevicemanager.cpp b/src/compositor/wayland_wrapper/qwldatadevicemanager.cpp
new file mode 100644
index 00000000..f89dbc31
--- /dev/null
+++ b/src/compositor/wayland_wrapper/qwldatadevicemanager.cpp
@@ -0,0 +1,308 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Compositor.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwldatadevicemanager_p.h"
+
+#include "qwldatadevice_p.h"
+#include "qwldatasource_p.h"
+#include "qwlinputdevice_p.h"
+#include "qwlcompositor_p.h"
+#include "qwldataoffer_p.h"
+#include "qwlsurface_p.h"
+#include "qwaylandmimehelper.h"
+
+#include <QtCore/QDebug>
+#include <QtCore/QSocketNotifier>
+#include <fcntl.h>
+#include <QtCore/private/qcore_unix_p.h>
+#include <QtCore/QFile>
+
+QT_BEGIN_NAMESPACE
+
+namespace QtWayland {
+
+DataDeviceManager::DataDeviceManager(Compositor *compositor)
+    : m_compositor(compositor)
+    , m_current_selection_source(0)
+    , m_retainedReadNotifier(0)
+    , m_compositorOwnsSelection(false)
+{
+    wl_display_add_global(compositor->wl_display(), &wl_data_device_manager_interface, this, DataDeviceManager::bind_func_drag);
+}
+
+void DataDeviceManager::setCurrentSelectionSource(DataSource *source)
+{
+    if (m_current_selection_source
+            && m_current_selection_source->time() > source->time()) {
+        qDebug() << "Trying to set older selection";
+        return;
+    }
+
+    m_compositorOwnsSelection = false;
+
+    finishReadFromClient();
+
+    m_current_selection_source = source;
+    source->setManager(this);
+
+    // When retained selection is enabled, the compositor will query all the data from the client.
+    // This makes it possible to
+    //    1. supply the selection after the offering client is gone
+    //    2. make it possible for the compositor to participate in copy-paste
+    // The downside is decreased performance, therefore this mode has to be enabled
+    // explicitly in the compositors.
+    if (m_compositor->wantsRetainedSelection()) {
+        m_retainedData.clear();
+        m_retainedReadIndex = 0;
+        retain();
+    }
+}
+
+void DataDeviceManager::sourceDestroyed(DataSource *source)
+{
+    Q_UNUSED(source);
+    if (m_current_selection_source == source)
+        finishReadFromClient();
+}
+
+void DataDeviceManager::retain()
+{
+    QList<QByteArray> offers = m_current_selection_source->offerList();
+    finishReadFromClient();
+    if (m_retainedReadIndex >= offers.count()) {
+        m_compositor->feedRetainedSelectionData(&m_retainedData);
+        return;
+    }
+    QByteArray mimeType = offers.at(m_retainedReadIndex);
+    m_retainedReadBuf.clear();
+    int fd[2];
+    if (pipe(fd) == -1) {
+        qWarning("Clipboard: Failed to create pipe");
+        return;
+    }
+    fcntl(fd[0], F_SETFL, fcntl(fd[0], F_GETFL, 0) | O_NONBLOCK);
+    m_current_selection_source->postSendEvent(mimeType, fd[1]);
+    close(fd[1]);
+    m_retainedReadNotifier = new QSocketNotifier(fd[0], QSocketNotifier::Read, this);
+    connect(m_retainedReadNotifier, SIGNAL(activated(int)), SLOT(readFromClient(int)));
+}
+
+void DataDeviceManager::finishReadFromClient(bool exhausted)
+{
+    Q_UNUSED(exhausted);
+    if (m_retainedReadNotifier) {
+        if (exhausted) {
+            int fd = m_retainedReadNotifier->socket();
+            delete m_retainedReadNotifier;
+            close(fd);
+        } else {
+            // Do not close the handle or destroy the read notifier here
+            // or else clients may SIGPIPE.
+            m_obsoleteRetainedReadNotifiers.append(m_retainedReadNotifier);
+        }
+        m_retainedReadNotifier = 0;
+    }
+}
+
+void DataDeviceManager::readFromClient(int fd)
+{
+    static char buf[4096];
+    int obsCount = m_obsoleteRetainedReadNotifiers.count();
+    for (int i = 0; i < obsCount; ++i) {
+        QSocketNotifier *sn = m_obsoleteRetainedReadNotifiers.at(i);
+        if (sn->socket() == fd) {
+            // Read and drop the data, stopping to read and closing the handle
+            // is not yet safe because that could kill the client with SIGPIPE
+            // when it still tries to write.
+            int n;
+            do {
+                n = QT_READ(fd, buf, sizeof buf);
+            } while (n > 0);
+            if (n != -1 || (errno != EAGAIN && errno != EWOULDBLOCK)) {
+                m_obsoleteRetainedReadNotifiers.removeAt(i);
+                delete sn;
+                close(fd);
+            }
+            return;
+        }
+    }
+    int n = QT_READ(fd, buf, sizeof buf);
+    if (n <= 0) {
+        if (n != -1 || (errno != EAGAIN && errno != EWOULDBLOCK)) {
+            finishReadFromClient(true);
+            QList<QByteArray> offers = m_current_selection_source->offerList();
+            QString mimeType = QString::fromLatin1(offers.at(m_retainedReadIndex));
+            m_retainedData.setData(mimeType, m_retainedReadBuf);
+            ++m_retainedReadIndex;
+            retain();
+        }
+    } else {
+        m_retainedReadBuf.append(buf, n);
+    }
+}
+
+DataSource *DataDeviceManager::currentSelectionSource()
+{
+    return m_current_selection_source;
+}
+
+struct wl_display *DataDeviceManager::display() const
+{
+    return m_compositor->wl_display();
+}
+
+void DataDeviceManager::bind_func_drag(struct wl_client *client, void *data, uint32_t version, uint32_t id)
+{
+    Q_UNUSED(version);
+    wl_client_add_object(client,&wl_data_device_manager_interface,&drag_interface,id,data);
+}
+
+void DataDeviceManager::bind_func_data(struct wl_client *client, void *data, uint32_t version, uint32_t id)
+{
+    Q_UNUSED(client);
+    Q_UNUSED(data);
+    Q_UNUSED(version);
+    Q_UNUSED(id);
+}
+
+void DataDeviceManager::get_data_device(struct wl_client *client,
+                      struct wl_resource *data_device_manager_resource,
+                      uint32_t id,
+                      struct wl_resource *input_device_resource)
+{
+    DataDeviceManager *data_device_manager = static_cast<DataDeviceManager *>(data_device_manager_resource->data);
+    InputDevice *input_device = resolve<InputDevice>(input_device_resource);
+    input_device->clientRequestedDataDevice(data_device_manager,client,id);
+}
+
+void DataDeviceManager::create_data_source(struct wl_client *client,
+                               struct wl_resource *data_device_manager_resource,
+                               uint32_t id)
+{
+    Q_UNUSED(data_device_manager_resource);
+    new DataSource(client,id, Compositor::currentTimeMsecs());
+}
+
+struct wl_data_device_manager_interface DataDeviceManager::drag_interface = {
+    DataDeviceManager::create_data_source,
+    DataDeviceManager::get_data_device
+};
+
+void DataDeviceManager::overrideSelection(const QMimeData &mimeData)
+{
+    QStringList formats = mimeData.formats();
+    if (formats.isEmpty())
+        return;
+
+    m_retainedData.clear();
+    foreach (const QString &format, formats)
+        m_retainedData.setData(format, mimeData.data(format));
+
+    m_compositor->feedRetainedSelectionData(&m_retainedData);
+
+    m_compositorOwnsSelection = true;
+
+    InputDevice *dev = m_compositor->defaultInputDevice();
+    Surface *focusSurface = dev->keyboardFocus();
+    if (focusSurface)
+        offerFromCompositorToClient(
+                    dev->dataDevice(focusSurface->base()->resource.client)->dataDeviceResource());
+}
+
+bool DataDeviceManager::offerFromCompositorToClient(wl_resource *clientDataDeviceResource)
+{
+    if (!m_compositorOwnsSelection)
+        return false;
+
+    wl_client *client = clientDataDeviceResource->client;
+    //qDebug("compositor offers %d types to %p", m_retainedData.formats().count(), client);
+
+    struct wl_resource *selectionOffer =
+             wl_client_new_object(client, &wl_data_offer_interface, &compositor_offer_interface, this);
+    wl_data_device_send_data_offer(clientDataDeviceResource, selectionOffer);
+    foreach (const QString &format, m_retainedData.formats()) {
+        QByteArray ba = format.toLatin1();
+        wl_data_offer_send_offer(selectionOffer, ba.constData());
+    }
+    wl_data_device_send_selection(clientDataDeviceResource, selectionOffer);
+
+    return true;
+}
+
+void DataDeviceManager::offerRetainedSelection(wl_resource *clientDataDeviceResource)
+{
+    if (m_retainedData.formats().isEmpty())
+        return;
+
+    m_compositorOwnsSelection = true;
+    offerFromCompositorToClient(clientDataDeviceResource);
+}
+
+void DataDeviceManager::comp_accept(wl_client *, wl_resource *, uint32_t, const char *)
+{
+}
+
+void DataDeviceManager::comp_receive(wl_client *client, wl_resource *resource, const char *mime_type, int32_t fd)
+{
+    Q_UNUSED(client);
+    DataDeviceManager *self = static_cast<DataDeviceManager *>(resource->data);
+    //qDebug("client %p wants data for type %s from compositor", client, mime_type);
+    QByteArray content = QWaylandMimeHelper::getByteArray(&self->m_retainedData, QString::fromLatin1(mime_type));
+    if (!content.isEmpty()) {
+        QFile f;
+        if (f.open(fd, QIODevice::WriteOnly))
+            f.write(content);
+    }
+    close(fd);
+}
+
+void DataDeviceManager::comp_destroy(wl_client *, wl_resource *)
+{
+}
+
+const struct wl_data_offer_interface DataDeviceManager::compositor_offer_interface = {
+    DataDeviceManager::comp_accept,
+    DataDeviceManager::comp_receive,
+    DataDeviceManager::comp_destroy
+};
+
+} //namespace
+
+QT_END_NAMESPACE