kwin/virtualkeyboard.cpp
Martin Flöser a17c85a9ea Support mapping QKeyEvent to xkb_keysym_t
Summary:
This is needed in virtual keyboard and also used KKeyServer so far. With
this change it is moved to new API provided in Xkb. The new translation
map is now also used for the direction from Qt::Key +
Qt::KeyboardModifier to xkb_keysym_t.

New implementation is supported by a new test case covering the same
combinations as in the existing direction.

Reviewers: #kwin, #plasma

Subscribers: plasma-devel, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D7356
2017-09-19 19:09:17 +02:00

437 lines
17 KiB
C++

/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2016 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "virtualkeyboard.h"
#include "input.h"
#include "keyboard_input.h"
#include "utils.h"
#include "screens.h"
#include "wayland_server.h"
#include "workspace.h"
#include "xkb.h"
#include <KWayland/Server/display.h>
#include <KWayland/Server/seat_interface.h>
#include <KWayland/Server/textinput_interface.h>
#include <KStatusNotifierItem>
#include <KLocalizedString>
#include <QDBusConnection>
#include <QDBusPendingCall>
#include <QDBusMessage>
#include <QGuiApplication>
#include <QQmlComponent>
#include <QQmlContext>
#include <QQmlEngine>
#include <QQuickItem>
#include <QQuickView>
#include <QQuickWindow>
// xkbcommon
#include <xkbcommon/xkbcommon.h>
using namespace KWayland::Server;
namespace KWin
{
KWIN_SINGLETON_FACTORY(VirtualKeyboard)
VirtualKeyboard::VirtualKeyboard(QObject *parent)
: QObject(parent)
{
// this is actually too late. Other processes are started before init,
// so might miss the availability of text input
// but without Workspace we don't have the window listed at all
connect(kwinApp(), &Application::workspaceCreated, this, &VirtualKeyboard::init);
}
VirtualKeyboard::~VirtualKeyboard() = default;
void VirtualKeyboard::init()
{
// TODO: need a shared Qml engine
m_inputWindow.reset(new QQuickView(nullptr));
m_inputWindow->setFlags(Qt::FramelessWindowHint);
m_inputWindow->setGeometry(screens()->geometry(screens()->current()));
m_inputWindow->setResizeMode(QQuickView::SizeRootObjectToView);
m_inputWindow->setSource(QUrl::fromLocalFile(QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral(KWIN_NAME "/virtualkeyboard/main.qml"))));
if (m_inputWindow->status() != QQuickView::Status::Ready) {
m_inputWindow.reset();
return;
}
m_inputWindow->setProperty("__kwin_input_method", true);
if (waylandServer()) {
m_enabled = !input()->hasAlphaNumericKeyboard();
connect(input(), &InputRedirection::hasAlphaNumericKeyboardChanged, this,
[this] (bool set) {
setEnabled(!set);
}
);
}
m_sni = new KStatusNotifierItem(QStringLiteral("kwin-virtual-keyboard"), this);
m_sni->setStandardActionsEnabled(false);
m_sni->setCategory(KStatusNotifierItem::Hardware);
m_sni->setStatus(KStatusNotifierItem::Passive);
m_sni->setTitle(i18n("Virtual Keyboard"));
updateSni();
connect(m_sni, &KStatusNotifierItem::activateRequested, this,
[this] {
setEnabled(!m_enabled);
}
);
if (waylandServer()) {
// we can announce support for the text input interface
auto t = waylandServer()->display()->createTextInputManager(TextInputInterfaceVersion::UnstableV0, waylandServer()->display());
t->create();
auto t2 = waylandServer()->display()->createTextInputManager(TextInputInterfaceVersion::UnstableV2, waylandServer()->display());
t2->create();
connect(waylandServer()->seat(), &SeatInterface::focusedTextInputChanged, this,
[this] {
disconnect(m_waylandShowConnection);
disconnect(m_waylandHideConnection);
disconnect(m_waylandHintsConnection);
disconnect(m_waylandSurroundingTextConnection);
disconnect(m_waylandResetConnection);
disconnect(m_waylandEnabledConnection);
qApp->inputMethod()->reset();
if (auto t = waylandServer()->seat()->focusedTextInput()) {
m_waylandShowConnection = connect(t, &TextInputInterface::requestShowInputPanel, this, &VirtualKeyboard::show);
m_waylandHideConnection = connect(t, &TextInputInterface::requestHideInputPanel, this, &VirtualKeyboard::hide);
m_waylandSurroundingTextConnection = connect(t, &TextInputInterface::surroundingTextChanged, this,
[] {
qApp->inputMethod()->update(Qt::ImSurroundingText | Qt::ImCursorPosition | Qt::ImAnchorPosition);
}
);
m_waylandHintsConnection = connect(t, &TextInputInterface::contentTypeChanged, this,
[] {
qApp->inputMethod()->update(Qt::ImHints);
}
);
m_waylandResetConnection = connect(t, &TextInputInterface::requestReset, qApp->inputMethod(), &QInputMethod::reset);
m_waylandEnabledConnection = connect(t, &TextInputInterface::enabledChanged, this,
[] {
qApp->inputMethod()->update(Qt::ImQueryAll);
}
);
// TODO: calculate overlap
t->setInputPanelState(m_inputWindow->isVisible(), QRect(0, 0, 0, 0));
} else {
m_waylandShowConnection = QMetaObject::Connection();
m_waylandHideConnection = QMetaObject::Connection();
m_waylandHintsConnection = QMetaObject::Connection();
m_waylandSurroundingTextConnection = QMetaObject::Connection();
m_waylandResetConnection = QMetaObject::Connection();
m_waylandEnabledConnection = QMetaObject::Connection();
}
qApp->inputMethod()->update(Qt::ImQueryAll);
}
);
}
m_inputWindow->installEventFilter(this);
connect(Workspace::self(), &Workspace::destroyed, this,
[this] {
m_inputWindow.reset();
}
);
m_inputWindow->setColor(Qt::transparent);
m_inputWindow->setMask(m_inputWindow->rootObject()->childrenRect().toRect());
connect(m_inputWindow->rootObject(), &QQuickItem::childrenRectChanged, m_inputWindow.data(),
[this] {
if (!m_inputWindow) {
return;
}
m_inputWindow->setMask(m_inputWindow->rootObject()->childrenRect().toRect());
}
);
connect(qApp->inputMethod(), &QInputMethod::visibleChanged, m_inputWindow.data(),
[this] {
m_inputWindow->setVisible(qApp->inputMethod()->isVisible());
if (qApp->inputMethod()->isVisible()) {
m_inputWindow->setMask(m_inputWindow->rootObject()->childrenRect().toRect());
}
if (waylandServer()) {
if (auto t = waylandServer()->seat()->focusedTextInput()) {
// TODO: calculate overlap
t->setInputPanelState(m_inputWindow->isVisible(), QRect(0, 0, 0, 0));
}
}
}
);
}
void VirtualKeyboard::setEnabled(bool enabled)
{
if (m_enabled == enabled) {
return;
}
m_enabled = enabled;
qApp->inputMethod()->update(Qt::ImQueryAll);
updateSni();
// send OSD message
QDBusMessage msg = QDBusMessage::createMethodCall(
QStringLiteral("org.kde.plasmashell"),
QStringLiteral("/org/kde/osdService"),
QStringLiteral("org.kde.osdService"),
QStringLiteral("virtualKeyboardEnabledChanged")
);
msg.setArguments({enabled});
QDBusConnection::sessionBus().asyncCall(msg);
}
void VirtualKeyboard::updateSni()
{
if (!m_sni) {
return;
}
if (m_enabled) {
m_sni->setIconByName(QStringLiteral("input-keyboard-virtual-on"));
m_sni->setToolTipTitle(i18n("Virtual Keyboard is enabled."));
} else {
m_sni->setIconByName(QStringLiteral("input-keyboard-virtual-off"));
m_sni->setToolTipTitle(i18n("Virtual Keyboard is disabled."));
}
}
void VirtualKeyboard::show()
{
if (m_inputWindow.isNull() || !m_enabled) {
return;
}
m_inputWindow->setGeometry(screens()->geometry(screens()->current()));
qApp->inputMethod()->show();
}
void VirtualKeyboard::hide()
{
if (m_inputWindow.isNull()) {
return;
}
qApp->inputMethod()->hide();
}
bool VirtualKeyboard::event(QEvent *e)
{
if (e->type() == QEvent::InputMethod) {
QInputMethodEvent *event = static_cast<QInputMethodEvent*>(e);
if (m_enabled && waylandServer()) {
bool isPreedit = false;
for (auto attribute : event->attributes()) {
switch (attribute.type) {
case QInputMethodEvent::TextFormat:
case QInputMethodEvent::Cursor:
case QInputMethodEvent::Language:
case QInputMethodEvent::Ruby:
isPreedit = true;
break;
default:
break;
}
}
TextInputInterface *ti = waylandServer()->seat()->focusedTextInput();
if (ti && ti->isEnabled()) {
if (!isPreedit && event->preeditString().isEmpty() && !event->commitString().isEmpty()) {
ti->commit(event->commitString().toUtf8());
} else {
ti->preEdit(event->preeditString().toUtf8(), event->commitString().toUtf8());
}
}
}
}
if (e->type() == QEvent::InputMethodQuery) {
auto event = static_cast<QInputMethodQueryEvent*>(e);
TextInputInterface *ti = nullptr;
if (waylandServer() && m_enabled) {
ti = waylandServer()->seat()->focusedTextInput();
}
if (event->queries().testFlag(Qt::ImEnabled)) {
event->setValue(Qt::ImEnabled, QVariant(ti != nullptr && ti->isEnabled()));
}
if (event->queries().testFlag(Qt::ImCursorRectangle)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImFont)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImCursorPosition)) {
// the virtual keyboard doesn't send us the cursor position in the preedit
// this would break text input, thus we ignore it
// see https://bugreports.qt.io/browse/QTBUG-53517
#if 0
event->setValue(Qt::ImCursorPosition, QString::fromUtf8(ti->surroundingText().left(ti->surroundingTextCursorPosition())).size());
#else
event->setValue(Qt::ImCursorPosition, 0);
#endif
}
if (event->queries().testFlag(Qt::ImSurroundingText)) {
// the virtual keyboard doesn't send us the cursor position in the preedit
// this would break text input, thus we ignore it
// see https://bugreports.qt.io/browse/QTBUG-53517
#if 0
event->setValue(Qt::ImSurroundingText, QString::fromUtf8(ti->surroundingText()));
#else
event->setValue(Qt::ImSurroundingText, QString());
#endif
}
if (event->queries().testFlag(Qt::ImCurrentSelection)) {
// TODO: should be text between cursor and anchor, but might be dangerous
}
if (event->queries().testFlag(Qt::ImMaximumTextLength)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImAnchorPosition)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImHints)) {
if (ti && ti->isEnabled()) {
Qt::InputMethodHints hints;
const auto contentHints = ti->contentHints();
if (!contentHints.testFlag(TextInputInterface::ContentHint::AutoCompletion)) {
hints |= Qt::ImhNoPredictiveText;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::AutoCorrection)) {
// no mapping in Qt
}
if (!contentHints.testFlag(TextInputInterface::ContentHint::AutoCapitalization)) {
hints |= Qt::ImhNoAutoUppercase;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::LowerCase)) {
hints |= Qt::ImhPreferLowercase;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::UpperCase)) {
hints |= Qt::ImhPreferUppercase;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::TitleCase)) {
// no mapping in Qt
}
if (contentHints.testFlag(TextInputInterface::ContentHint::HiddenText)) {
hints |= Qt::ImhHiddenText;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::SensitiveData)) {
hints |= Qt::ImhSensitiveData;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::Latin)) {
hints |= Qt::ImhPreferLatin;
}
if (contentHints.testFlag(TextInputInterface::ContentHint::MultiLine)) {
hints |= Qt::ImhMultiLine;
}
switch (ti->contentPurpose()) {
case TextInputInterface::ContentPurpose::Digits:
hints |= Qt::ImhDigitsOnly;
break;
case TextInputInterface::ContentPurpose::Number:
hints |= Qt::ImhFormattedNumbersOnly;
break;
case TextInputInterface::ContentPurpose::Phone:
hints |= Qt::ImhDialableCharactersOnly;
break;
case TextInputInterface::ContentPurpose::Url:
hints |= Qt::ImhUrlCharactersOnly;
break;
case TextInputInterface::ContentPurpose::Email:
hints |= Qt::ImhEmailCharactersOnly;
break;
case TextInputInterface::ContentPurpose::Date:
hints |= Qt::ImhDate;
break;
case TextInputInterface::ContentPurpose::Time:
hints |= Qt::ImhTime;
break;
case TextInputInterface::ContentPurpose::DateTime:
hints |= Qt::ImhDate;
hints |= Qt::ImhTime;
break;
case TextInputInterface::ContentPurpose::Name:
// no mapping in Qt
case TextInputInterface::ContentPurpose::Password:
// no mapping in Qt
case TextInputInterface::ContentPurpose::Terminal:
// no mapping in Qt
case TextInputInterface::ContentPurpose::Normal:
// that's the default
case TextInputInterface::ContentPurpose::Alpha:
// no mapping in Qt
break;
}
event->setValue(Qt::ImHints, QVariant(int(hints)));
} else {
event->setValue(Qt::ImHints, Qt::ImhNone);
}
}
if (event->queries().testFlag(Qt::ImPreferredLanguage)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImPlatformData)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImAbsolutePosition)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImTextBeforeCursor)) {
// not used by virtual keyboard
}
if (event->queries().testFlag(Qt::ImTextAfterCursor)) {
// not used by virtual keyboard
}
event->accept();
return true;
}
return QObject::event(e);
}
bool VirtualKeyboard::eventFilter(QObject *o, QEvent *e)
{
if (o != m_inputWindow.data() || !m_inputWindow->isVisible()) {
return false;
}
if (e->type() == QEvent::KeyPress || e->type() == QEvent::KeyRelease) {
QKeyEvent *event = static_cast<QKeyEvent*>(e);
if (event->nativeScanCode() == 0) {
// this is a key composed by the virtual keyboard - we need to send it to the client
const auto sym = input()->keyboard()->xkb()->fromKeyEvent(event);
if (sym != 0) {
if (waylandServer()) {
auto t = waylandServer()->seat()->focusedTextInput();
if (t && t->isEnabled()) {
if (e->type() == QEvent::KeyPress) {
t->keysymPressed(sym);
} else if (e->type() == QEvent::KeyRelease) {
t->keysymReleased(sym);
}
}
}
}
return true;
}
}
return false;
}
QWindow *VirtualKeyboard::inputPanel() const
{
return m_inputWindow.data();
}
}