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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtVirtualKeyboard>
#include <QApplication>
#include <QLoggingCategory>
#include "handlekeyevents.h"
#include "vkbhidetimer.h"
#include "xcbkeyboard.h"
#include "keysymmapsforfakeinput.h"
extern "C" {
#include <xdo.h>
#include <X11/extensions/XTest.h>
}
namespace {
const bool KKeyPress = true;
const bool KKeyRelease = false;
// Undefine define KeyRelease from X.h.
// Enables using QEvent::KeyRelease type in eventFilter.
#ifdef KeyRelease
#undef KeyRelease
#endif
}
Q_LOGGING_CATEGORY(lcHandleKeyEvents, "qt.virtualkeyboard.tests.manual.x11vkbwrapper.handlekeyevents")
/**
* @brief qtKeyToXKeySym
* Mapping a Qt::Key to the KeySym.
* @param key a Pressed virtual key
* @param upper True if a Shift in use
* @return
*/
KeySym qtKeyToXKeySym(Qt::Key key, bool upper)
{
const auto keySym = XStringToKeysym(QKeySequence(key).toString().toUtf8().data());
KeySym keyS = upper ? keySym : static_cast<unsigned long>(tolower(static_cast<int>(keySym)));
if (keyS != NoSymbol) {
return keyS;
}
for (int i = 0; KeyTbl[i] != 0; i += 2) {
if (KeyTbl[i + 1] == key) {
return KeyTbl[i];
}
}
return static_cast<ushort>(key);
}
/**
* @brief HandleKeyEvents::HandleKeyEvents
* Handling a key release events.
* @param parent
*/
HandleKeyEvents::HandleKeyEvents(QObject *parent) : QObject(parent),
m_xdo(nullptr)
{
}
/**
* @brief HandleKeyEvents::~HandleKeyEvents
*/
HandleKeyEvents::~HandleKeyEvents()
{
qCDebug(lcHandleKeyEvents) << Q_FUNC_INFO;
xdo_free(m_xdo);
}
/**
* @brief HandleKeyEvents::init
* @return false if xdo_new fail
*/
bool HandleKeyEvents::init()
{
m_xdo = xdo_new(nullptr);
return m_xdo != nullptr;
}
/**
* @brief HandleKeyEvents::eventFilter
* Catch the QEvent::KeyRelease event.
* @param watched
* @param event a QEvent::KeyRelease
* @return
*/
bool HandleKeyEvents::eventFilter(QObject *watched, QEvent *event)
{
Q_UNUSED( watched );
const auto type = event->type();
if (type == QEvent::MouseButtonRelease && !QGuiApplication::inputMethod()->isVisible()) {
// Start the VKB hide timer when the VKB indicator image is pressed.
VkbHideTimer::getInstance()->startTimer();
}
if (type == QEvent::MouseMove) {
// Start/re-start the VKB hide timer when there's mouse move event
// anywhere on the virtual keyboard surface.
VkbHideTimer::getInstance()->startTimer();
}
if (type == QEvent::MouseButtonPress) {
// Start/re-start the VKB hide timer when there's button press event
// anywhere on the virtual keyboard surface.
VkbHideTimer::getInstance()->startTimer();
}
if (type == QEvent::KeyRelease) {
if (m_xdo == nullptr) {
qWarning() << Q_FUNC_INFO << "xdo_t instance is not valid, shutting down...";
QApplication::exit(1);
}
// Start/re-start the VKB hide timer when the VKB keys are pressed.
VkbHideTimer::getInstance()->startTimer();
auto keyEvent = static_cast<QKeyEvent *>(event);
bool shiftOn = keyEvent->modifiers() == Qt::ShiftModifier;
auto key = static_cast<Qt::Key>(keyEvent->key());
QString str = keyEvent->text();
/** a Qt special keys. */
if (qtKeyCodes.indexOf(key) >= 0) {
xdo_send_keysequence_window(m_xdo, CURRENTWINDOW,
XKeysymToString(qtKeyToXKeySym(key, shiftOn)),
2000);
/** a Key strings as Emojis ":-), <3". */
} else if (str.length() > 1) {
xdo_enter_text_window(m_xdo, CURRENTWINDOW,
str.toLatin1(),
2000);
/** a Normal Keys. */
} else if (!str.isEmpty()) {
keyTap(str);
}
}
return false;
}
/**
* @brief HandleKeyEvents::keyTap
* @param key a Key as a string
*/
void HandleKeyEvents::keyTap(const QString &key) const
{
qCDebug(lcHandleKeyEvents) << Q_FUNC_INFO;
bool shiftDown = false;
KeyCode keyCode = getUnicodeKeycode(key);
KeyCode shift = XKeysymToKeycode(m_xdo->xdpy, XK_Shift_L);
/** Press a Shift button down if capital letter. */
if (key.length() == 1 && (key.toLower() != key || xUpKeyCodes.count(key))) {
keyPressRelease(shift, KKeyPress);
shiftDown = true;
}
/** A Key press */
keyPressRelease(keyCode, KKeyPress);
/** A Key release */
keyPressRelease(keyCode, KKeyRelease);
/** Release a Shift button if capital letter. */
if (shiftDown) {
keyPressRelease(shift, KKeyRelease);
}
}
/**
* @brief HandleKeyEvents::keyPressRelease
* Press / Release a key
* @param key a Key as a string
* @param eventType true when press a key
*/
void HandleKeyEvents::keyPressRelease(const KeyCode key, const bool eventType) const
{
qCDebug(lcHandleKeyEvents) << Q_FUNC_INFO;
XTestFakeKeyEvent(m_xdo->xdpy, key, eventType ? 1 : 0, 0);
XFlush(m_xdo->xdpy);
}
/**
* @brief HandleKeyEvents::getUnicodeKeycode
* Get a correct key mapping for a key.
* @param key a Key as a string
* @return Keycode
*/
KeyCode HandleKeyEvents::getUnicodeKeycode(const QString &key) const
{
qCDebug(lcHandleKeyEvents) << Q_FUNC_INFO;
KeyCode code = 0;
if (xKeyCodes.count(key)) {
auto xKeyIter = xKeyCodes.find(key);
code = XKeysymToKeycode(m_xdo->xdpy, xKeyIter->second);
} else if (xUpKeyCodes.count(key)) {
auto xUpKeyIter = xKeyCodes.find(key);
code = XKeysymToKeycode(m_xdo->xdpy, xUpKeyIter->second);
} else {
auto unicodeIter = unicodeKeySymbols.find(key);
quint32 unicodeKey = unicodeIter != unicodeKeySymbols.end() ? unicodeIter->second : 0;
KeySym keysyms[] = {unicodeKey};
XChangeKeyboardMapping(m_xdo->xdpy, 999, 1, static_cast<KeySym*>(keysyms), 1);
code = static_cast<KeyCode>(999);
}
return code;
}
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