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qfcitxplatforminputcontext.cpp
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qfcitxplatforminputcontext.cpp
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/*
* SPDX-FileCopyrightText: 2011~2017 CSSlayer <wengxt@gmail.com>
*
* SPDX-License-Identifier: BSD-3-Clause
*
*/
#include <QDBusConnection>
#include <QDebug>
#include <QInputMethod>
#include <QKeyEvent>
#include <QMetaMethod>
#include <QPalette>
#include <QTextCharFormat>
#include <QWidget>
#include <QWindow>
#include <qnamespace.h>
#include <qpa/qplatformcursor.h>
#include <qpa/qplatformnativeinterface.h>
#include <qpa/qplatformscreen.h>
#include <qpa/qwindowsysteminterface.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include "fcitx4watcher.h"
#include "fcitxcandidatewindow.h"
#include "fcitxflags.h"
#include "fcitxtheme.h"
#include "hybridinputcontext.h"
#include "qfcitxplatforminputcontext.h"
#include "qtkey.h"
#include <array>
#include <memory>
#include <xcb/xcb.h>
namespace fcitx {
template <typename T>
using XCBReply = std::unique_ptr<T, decltype(&std::free)>;
template <typename T>
XCBReply<T> makeXCBReply(T *ptr) noexcept {
return {ptr, &std::free};
}
void setFocusGroupForX11(const QByteArray &uuid) {
if (uuid.size() != 16) {
return;
}
if (QGuiApplication::platformName() != QLatin1String("xcb")) {
return;
}
auto native = QGuiApplication::platformNativeInterface();
if (!native) {
return;
}
auto connection = static_cast<xcb_connection_t *>(
native->nativeResourceForIntegration(QByteArray("connection")));
if (!connection) {
return;
}
xcb_atom_t result = XCB_ATOM_NONE;
{
char atomName[] = "_FCITX_SERVER";
xcb_intern_atom_cookie_t cookie =
xcb_intern_atom(connection, false, strlen(atomName), atomName);
auto reply =
makeXCBReply(xcb_intern_atom_reply(connection, cookie, nullptr));
if (reply) {
result = reply->atom;
}
if (result == XCB_ATOM_NONE) {
return;
}
}
xcb_window_t owner = XCB_WINDOW_NONE;
{
auto cookie = xcb_get_selection_owner(connection, result);
auto reply = makeXCBReply(
xcb_get_selection_owner_reply(connection, cookie, nullptr));
if (reply) {
owner = reply->owner;
}
}
if (owner == XCB_WINDOW_NONE) {
return;
}
xcb_client_message_event_t ev;
memset(&ev, 0, sizeof(ev));
ev.response_type = XCB_CLIENT_MESSAGE;
ev.window = owner;
ev.type = result;
ev.format = 8;
memcpy(ev.data.data8, uuid.constData(), 16);
xcb_send_event(connection, false, owner, XCB_EVENT_MASK_NO_EVENT,
reinterpret_cast<char *>(&ev));
xcb_flush(connection);
}
static bool get_boolean_env(const char *name, bool defval) {
const char *value = getenv(name);
if (value == nullptr)
return defval;
if (strcmp(value, "") == 0 || strcmp(value, "0") == 0 ||
strcmp(value, "false") == 0 || strcmp(value, "False") == 0 ||
strcmp(value, "FALSE") == 0)
return false;
return true;
}
static inline const char *get_locale() {
const char *locale = getenv("LC_ALL");
if (!locale)
locale = getenv("LC_CTYPE");
if (!locale)
locale = getenv("LANG");
if (!locale)
locale = "C";
return locale;
}
struct xkb_context *_xkb_context_new_helper() {
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (context) {
xkb_context_set_log_level(context, XKB_LOG_LEVEL_CRITICAL);
}
return context;
}
QObject *deepestFocusProxy(QObject *object) {
auto *widget = qobject_cast<QWidget *>(object);
if (!widget) {
return object;
}
while (auto *proxy = widget->focusProxy()) {
widget = proxy;
}
return widget;
}
FcitxQtICData::FcitxQtICData(QFcitxPlatformInputContext *context,
QWindow *window)
: proxy(new HybridInputContext(context->watcher(), context->fcitx4Watcher(),
context)),
context_(context), window_(window) {
proxy->setProperty("icData",
QVariant::fromValue(static_cast<void *>(this)));
QObject::connect(window, &QWindow::visibilityChanged, proxy,
[this](bool visible) {
if (!visible) {
resetCandidateWindow();
}
});
QObject::connect(context_->watcher(), &FcitxQtWatcher::availabilityChanged,
proxy, [this](bool avail) {
if (!avail) {
resetCandidateWindow();
}
});
window->installEventFilter(this);
}
FcitxQtICData::~FcitxQtICData() {
if (window_) {
window_->removeEventFilter(this);
}
delete proxy;
resetCandidateWindow();
}
bool FcitxQtICData::eventFilter(QObject *, QEvent *event) {
if (event->type() != QMouseEvent::MouseButtonPress) {
return false;
}
auto focusObject = context_->focusObjectWrapper();
if (!focusObject) {
return false;
}
if (!window_ || window_ != context_->focusWindowWrapper() ||
!context_->hasPreedit()) {
return false;
}
if (focusObject->metaObject()->className() ==
QLatin1String("KateViewInternal") ||
(focusObject->metaObject()->className() == QLatin1String("QtWidget") &&
QCoreApplication::applicationFilePath().endsWith("soffice.bin")) ||
focusObject->metaObject()->className() ==
QLatin1String("Konsole::TerminalDisplay")) {
if (context_->commitPreedit()) {
if (proxy->isValid()) {
proxy->reset();
}
}
}
return false;
}
FcitxCandidateWindow *FcitxQtICData::candidateWindow() {
if (!candidateWindow_) {
candidateWindow_ = new FcitxCandidateWindow(window(), context_);
QObject::connect(
candidateWindow_, &FcitxCandidateWindow::candidateSelected, proxy,
[proxy = proxy](int index) { proxy->selectCandidate(index); });
QObject::connect(candidateWindow_, &FcitxCandidateWindow::prevClicked,
proxy, [proxy = proxy]() { proxy->prevPage(); });
QObject::connect(candidateWindow_, &FcitxCandidateWindow::nextClicked,
proxy, [proxy = proxy]() { proxy->nextPage(); });
}
return candidateWindow_;
}
void FcitxQtICData::resetCandidateWindow() {
if (auto *w = candidateWindow_.data()) {
candidateWindow_ = nullptr;
w->deleteLater();
return;
}
}
QFcitxPlatformInputContext::QFcitxPlatformInputContext()
: watcher_(new FcitxQtWatcher(
QDBusConnection::connectToBus(QDBusConnection::SessionBus, "fcitx"),
this)),
fcitx4Watcher_(new Fcitx4Watcher(watcher_->connection(), this)),
cursorPos_(0), useSurroundingText_(false),
syncMode_(get_boolean_env("FCITX_QT_USE_SYNC", false)), destroy_(false),
xkbContext_(_xkb_context_new_helper()),
xkbComposeTable_(xkbContext_ ? xkb_compose_table_new_from_locale(
xkbContext_.data(), get_locale(),
XKB_COMPOSE_COMPILE_NO_FLAGS)
: 0),
xkbComposeState_(xkbComposeTable_
? xkb_compose_state_new(xkbComposeTable_.data(),
XKB_COMPOSE_STATE_NO_FLAGS)
: 0) {
registerFcitxQtDBusTypes();
watcher_->setWatchPortal(true);
// Input context may be created without QApplication with wayland, defer it
// to event loop to ensure event dispatcher is avaiable.
QMetaObject::invokeMethod(
this,
[this]() {
watcher_->watch();
fcitx4Watcher_->watch();
},
Qt::QueuedConnection);
}
QFcitxPlatformInputContext::~QFcitxPlatformInputContext() {
destroy_ = true;
watcher_->unwatch();
fcitx4Watcher_->unwatch();
cleanUp();
delete watcher_;
delete fcitx4Watcher_;
}
bool QFcitxPlatformInputContext::objectAcceptsInputMethod() const {
bool enabled = false;
QObject *object = qGuiApp->focusObject();
if (object) {
QInputMethodQueryEvent query(Qt::ImEnabled);
QGuiApplication::sendEvent(object, &query);
enabled = query.value(Qt::ImEnabled).toBool();
}
QObject *realFocusObject = focusObjectWrapper();
// Make sure we don't query same object twice.
if (realFocusObject && realFocusObject != object && !enabled) {
QInputMethodQueryEvent query(Qt::ImEnabled);
QGuiApplication::sendEvent(realFocusObject, &query);
enabled = query.value(Qt::ImEnabled).toBool();
}
return enabled;
}
bool QFcitxPlatformInputContext::shouldDisableInputMethod() const {
return !inputMethodAccepted() && !objectAcceptsInputMethod();
}
void QFcitxPlatformInputContext::cleanUp() {
icMap_.clear();
if (!destroy_) {
commitPreedit();
}
}
bool QFcitxPlatformInputContext::isValid() const { return true; }
void QFcitxPlatformInputContext::invokeAction(QInputMethod::Action imAction,
int cursorPosition) {
unsigned int action;
if (imAction == QInputMethod::Click) {
action = 0;
} else if (imAction == QInputMethod::ContextMenu) {
action = 1;
} else {
return;
}
if (auto *proxy = validIC(); proxy->supportInvokeAction()) {
if (cursorPosition >= 0 && cursorPosition <= preedit_.length()) {
auto ucs4Cursor = preedit_.left(cursorPosition).toUcs4().length();
proxy->invokeAction(action, ucs4Cursor);
}
} else {
if (cursorPosition <= 0 || cursorPosition >= preedit_.length()) {
// qDebug() << action << cursorPosition;
reset();
}
}
}
bool QFcitxPlatformInputContext::commitPreedit(QPointer<QObject> input) {
if (!input) {
return false;
}
if (preeditList_.isEmpty()) {
return false;
}
QInputMethodEvent e;
if (!commitPreedit_.isEmpty()) {
e.setCommitString(commitPreedit_);
}
commitPreedit_.clear();
preeditList_.clear();
QCoreApplication::sendEvent(input, &e);
return true;
}
bool checkUtf8(const QByteArray &byteArray) {
QString s = QString::fromUtf8(byteArray);
return !s.contains(QChar::ReplacementCharacter);
}
void QFcitxPlatformInputContext::reset() {
commitPreedit();
if (auto *proxy = validIC()) {
proxy->reset();
}
if (xkbComposeState_) {
xkb_compose_state_reset(xkbComposeState_.data());
}
QPlatformInputContext::reset();
}
void QFcitxPlatformInputContext::update(Qt::InputMethodQueries queries) {
QWindow *window = focusWindowWrapper();
auto *proxy = validICByWindow(window);
if (!proxy)
return;
FcitxQtICData &data = *static_cast<FcitxQtICData *>(
proxy->property("icData").value<void *>());
QObject *input = focusObjectWrapper();
if (!input)
return;
QInputMethodQueryEvent query(queries);
QGuiApplication::sendEvent(input, &query);
if (queries & Qt::ImCursorRectangle) {
cursorRectChanged();
}
if (queries & Qt::ImEnabled) {
if (shouldDisableInputMethod()) {
addCapability(data, FcitxCapabilityFlag_Disable);
} else {
removeCapability(data, FcitxCapabilityFlag_Disable);
}
}
if (queries & Qt::ImHints) {
Qt::InputMethodHints hints =
Qt::InputMethodHints(query.value(Qt::ImHints).toUInt());
#define CHECK_HINTS(_HINTS, _CAPABILITY) \
if (hints & _HINTS) \
addCapability(data, FcitxCapabilityFlag_##_CAPABILITY); \
else \
removeCapability(data, FcitxCapabilityFlag_##_CAPABILITY);
CHECK_HINTS(Qt::ImhHiddenText, Password)
CHECK_HINTS(Qt::ImhSensitiveData, Sensitive)
CHECK_HINTS(Qt::ImhNoAutoUppercase, NoAutoUpperCase)
CHECK_HINTS(Qt::ImhPreferNumbers, Number)
CHECK_HINTS(Qt::ImhPreferUppercase, Uppercase)
CHECK_HINTS(Qt::ImhPreferLowercase, Lowercase)
CHECK_HINTS(Qt::ImhNoPredictiveText, NoSpellCheck)
CHECK_HINTS(Qt::ImhDigitsOnly, Digit)
CHECK_HINTS(Qt::ImhFormattedNumbersOnly, Number)
CHECK_HINTS(Qt::ImhUppercaseOnly, Uppercase)
CHECK_HINTS(Qt::ImhLowercaseOnly, Lowercase)
CHECK_HINTS(Qt::ImhDialableCharactersOnly, Dialable)
CHECK_HINTS(Qt::ImhEmailCharactersOnly, Email)
CHECK_HINTS(Qt::ImhPreferLatin, Alpha)
CHECK_HINTS(Qt::ImhUrlCharactersOnly, Url)
CHECK_HINTS(Qt::ImhMultiLine, Multiline)
}
bool setSurrounding = false;
do {
if (!useSurroundingText_)
break;
if (!(queries & (Qt::ImSurroundingText | Qt::ImCursorPosition |
Qt::ImAnchorPosition)))
break;
if ((data.capability & FcitxCapabilityFlag_Password) ||
(data.capability & FcitxCapabilityFlag_Sensitive))
break;
QVariant var = query.value(Qt::ImSurroundingText);
QVariant var1 = query.value(Qt::ImCursorPosition);
QVariant var2 = query.value(Qt::ImAnchorPosition);
if (!var.isValid() || !var1.isValid())
break;
QString text = var.toString();
/* we don't want to waste too much memory here */
#define SURROUNDING_THRESHOLD 4096
if (text.length() < SURROUNDING_THRESHOLD) {
if (checkUtf8(text.toUtf8())) {
addCapability(data, FcitxCapabilityFlag_SurroundingText);
int cursor = var1.toInt();
int anchor;
if (var2.isValid())
anchor = var2.toInt();
else
anchor = cursor;
// adjust it to real character size
QVector<unsigned int> tempUCS4 = text.left(cursor).toUcs4();
cursor = tempUCS4.size();
tempUCS4 = text.left(anchor).toUcs4();
anchor = tempUCS4.size();
if (data.surroundingText != text) {
data.surroundingText = text;
proxy->setSurroundingText(text, cursor, anchor);
} else {
if (data.surroundingAnchor != anchor ||
data.surroundingCursor != cursor)
proxy->setSurroundingTextPosition(cursor, anchor);
}
data.surroundingCursor = cursor;
data.surroundingAnchor = anchor;
setSurrounding = true;
}
}
if (!setSurrounding) {
data.surroundingAnchor = -1;
data.surroundingCursor = -1;
data.surroundingText = QString();
removeCapability(data, FcitxCapabilityFlag_SurroundingText);
}
} while (0);
}
void QFcitxPlatformInputContext::commit() {
auto *proxy = validICByWindow(lastWindow_);
commitPreedit(lastObject_);
if (proxy) {
proxy->reset();
FcitxQtICData &data = *static_cast<FcitxQtICData *>(
proxy->property("icData").value<void *>());
data.resetCandidateWindow();
}
}
void QFcitxPlatformInputContext::setFocusObject(QObject *object) {
Q_UNUSED(object);
// Since we have a wrapper, it's possible that real focus object is not
// changed. Do not emit focusOut and focusIn if:
// realFocusObject does not change.
QObject *realFocusObject = focusObjectWrapper();
if (lastObject_ == realFocusObject) {
return;
}
auto *proxy = validICByWindow(lastWindow_);
commitPreedit(lastObject_);
if (proxy) {
proxy->focusOut();
FcitxQtICData &data = *static_cast<FcitxQtICData *>(
proxy->property("icData").value<void *>());
data.resetCandidateWindow();
}
QWindow *window = focusWindowWrapper();
lastWindow_ = window;
lastObject_ = realFocusObject;
// Always create IC Data for window.
if (window) {
proxy = validICByWindow(window);
if (!proxy) {
createICData(window);
}
}
if (!window) {
lastWindow_ = nullptr;
lastObject_ = nullptr;
return;
}
if (proxy) {
proxy->focusIn();
// We need to delegate this otherwise it may cause self-recursion in
// certain application like libreoffice.
QMetaObject::invokeMethod(
this,
[this, window = QPointer<QWindow>(lastWindow_)]() {
if (window != lastWindow_) {
return;
}
update(Qt::ImHints | Qt::ImEnabled);
updateCursorRect();
},
Qt::QueuedConnection);
}
updateInputPanelVisible();
}
void QFcitxPlatformInputContext::updateCursorRect() {
if (validICByWindow(lastWindow_.data())) {
cursorRectChanged();
}
}
void QFcitxPlatformInputContext::windowDestroyed(QObject *object) {
/* access QWindow is not possible here, so we use our own map to do so */
icMap_.erase(static_cast<QWindow *>(object));
}
void QFcitxPlatformInputContext::cursorRectChanged() {
QWindow *inputWindow = focusWindowWrapper();
if (!inputWindow)
return;
auto *proxy = validICByWindow(inputWindow);
if (!proxy)
return;
FcitxQtICData &data = *static_cast<FcitxQtICData *>(
proxy->property("icData").value<void *>());
QRect r = cursorRectangleWrapper();
if (!r.isValid())
return;
// not sure if this is necessary but anyway, qt's screen used to be buggy.
if (!inputWindow->screen()) {
return;
}
qreal scale = inputWindow->devicePixelRatio();
if (data.capability & FcitxCapabilityFlag_RelativeRect) {
auto margins = inputWindow->frameMargins();
r.translate(margins.left(), margins.top());
r = QRect(r.topLeft() * scale, r.size() * scale);
if (data.rect != r) {
data.rect = r;
proxy->setCursorRectV2(r.x(), r.y(), r.width(), r.height(), scale);
}
return;
}
auto screenGeometry = inputWindow->screen()->geometry();
auto point = inputWindow->mapToGlobal(r.topLeft());
auto native =
(point - screenGeometry.topLeft()) * scale + screenGeometry.topLeft();
QRect newRect(native, r.size() * scale);
if (data.rect != newRect) {
data.rect = newRect;
proxy->setCursorRect(newRect.x(), newRect.y(), newRect.width(),
newRect.height());
}
}
void QFcitxPlatformInputContext::createInputContextFinished(
const QByteArray &uuid) {
auto proxy = qobject_cast<HybridInputContext *>(sender());
if (!proxy) {
return;
}
FcitxQtICData *data =
static_cast<FcitxQtICData *>(proxy->property("icData").value<void *>());
auto w = data->window();
data->rect = QRect();
if (proxy->isValid() && !uuid.isEmpty()) {
QWindow *window = focusWindowWrapper();
setFocusGroupForX11(uuid);
if (window && window == w) {
cursorRectChanged();
proxy->focusIn();
}
updateInputPanelVisible();
}
quint64 flag = 0;
flag |= FcitxCapabilityFlag_Preedit;
flag |= FcitxCapabilityFlag_FormattedPreedit;
flag |= FcitxCapabilityFlag_ClientUnfocusCommit;
flag |= FcitxCapabilityFlag_GetIMInfoOnFocus;
flag |= FcitxCapabilityFlag_KeyEventOrderFix;
flag |= FcitxCapabilityFlag_ReportKeyRepeat;
useSurroundingText_ =
get_boolean_env("FCITX_QT_ENABLE_SURROUNDING_TEXT", true);
if (useSurroundingText_) {
flag |= FcitxCapabilityFlag_SurroundingText;
}
if (QGuiApplication::platformName().startsWith("wayland")) {
flag |= FcitxCapabilityFlag_RelativeRect;
}
flag |= FcitxCapabilityFlag_ClientSideInputPanel;
if (shouldDisableInputMethod()) {
flag |= FcitxCapabilityFlag_Disable;
}
// Notify fcitx of the effective bits from 0bit to 40bit
// (FcitxCapabilityFlag_Disable)
data->proxy->setSupportedCapability(0x1ffffffffffull);
addCapability(*data, flag, true);
}
void QFcitxPlatformInputContext::updateCapability(const FcitxQtICData &data) {
if (!data.proxy || !data.proxy->isValid())
return;
data.proxy->setCapability(data.capability);
}
void QFcitxPlatformInputContext::commitString(const QString &str) {
cursorPos_ = 0;
preeditList_.clear();
commitPreedit_.clear();
QObject *input = qGuiApp->focusObject();
if (!input)
return;
QInputMethodEvent event;
event.setCommitString(str);
QCoreApplication::sendEvent(input, &event);
}
void QFcitxPlatformInputContext::updateFormattedPreedit(
const FcitxQtFormattedPreeditList &preeditList, int cursorPos) {
QObject *input = qGuiApp->focusObject();
if (!input)
return;
if (cursorPos == cursorPos_ && preeditList == preeditList_)
return;
preeditList_ = preeditList;
cursorPos_ = cursorPos;
QString str, commitStr;
int pos = 0;
QList<QInputMethodEvent::Attribute> attrList;
Q_FOREACH (const FcitxQtFormattedPreedit &preedit, preeditList) {
str += preedit.string();
if (!(preedit.format() & FcitxTextFormatFlag_DontCommit))
commitStr += preedit.string();
QTextCharFormat format;
if (preedit.format() & FcitxTextFormatFlag_Underline) {
format.setUnderlineStyle(QTextCharFormat::DashUnderline);
}
if (preedit.format() & FcitxTextFormatFlag_Strike) {
format.setFontStrikeOut(true);
}
if (preedit.format() & FcitxTextFormatFlag_Bold) {
format.setFontWeight(QFont::Bold);
}
if (preedit.format() & FcitxTextFormatFlag_Italic) {
format.setFontItalic(true);
}
if (preedit.format() & FcitxTextFormatFlag_HighLight) {
QBrush brush;
QPalette palette;
palette = QGuiApplication::palette();
format.setBackground(QBrush(
QColor(palette.color(QPalette::Active, QPalette::Highlight))));
format.setForeground(QBrush(QColor(
palette.color(QPalette::Active, QPalette::HighlightedText))));
}
attrList.append(
QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, pos,
preedit.string().length(), format));
pos += preedit.string().length();
}
QByteArray array = str.toUtf8();
array.truncate(cursorPos);
cursorPos = QString::fromUtf8(array).length();
attrList.append(QInputMethodEvent::Attribute(QInputMethodEvent::Cursor,
cursorPos, 1, 0));
preedit_ = str;
commitPreedit_ = commitStr;
QInputMethodEvent event(str, attrList);
QCoreApplication::sendEvent(input, &event);
update(Qt::ImCursorRectangle);
}
void QFcitxPlatformInputContext::updateClientSideUI(
const FcitxQtFormattedPreeditList &preedit, int cursorpos,
const FcitxQtFormattedPreeditList &auxUp,
const FcitxQtFormattedPreeditList &auxDown,
const FcitxQtStringKeyValueList &candidates, int candidateIndex,
int layoutHint, bool hasPrev, bool hasNext) {
QObject *input = qGuiApp->focusObject();
if (!input) {
return;
}
auto *proxy = qobject_cast<HybridInputContext *>(sender());
if (!proxy) {
return;
}
FcitxQtICData *data =
static_cast<FcitxQtICData *>(proxy->property("icData").value<void *>());
auto w = data->window();
auto window = focusWindowWrapper();
if (window && w == window) {
data->candidateWindow()->updateClientSideUI(
preedit, cursorpos, auxUp, auxDown, candidates, candidateIndex,
layoutHint, hasPrev, hasNext);
}
}
void QFcitxPlatformInputContext::deleteSurroundingText(int offset,
unsigned int _nchar) {
QObject *input = qGuiApp->focusObject();
if (!input)
return;
QInputMethodEvent event;
auto *proxy = qobject_cast<HybridInputContext *>(sender());
if (!proxy) {
return;
}
FcitxQtICData *data =
static_cast<FcitxQtICData *>(proxy->property("icData").value<void *>());
auto ucsText = data->surroundingText.toStdU32String();
int cursor = data->surroundingCursor;
// make nchar signed so we are safer
int nchar = _nchar;
// Qt's reconvert semantics is different from gtk's. It doesn't count the
// current
// selection. Discard selection from nchar.
if (data->surroundingAnchor < data->surroundingCursor) {
nchar -= data->surroundingCursor - data->surroundingAnchor;
offset += data->surroundingCursor - data->surroundingAnchor;
cursor = data->surroundingAnchor;
} else if (data->surroundingAnchor > data->surroundingCursor) {
nchar -= data->surroundingAnchor - data->surroundingCursor;
cursor = data->surroundingCursor;
}
// validates
if (nchar >= 0 && cursor + offset >= 0 &&
cursor + offset + nchar <= static_cast<int>(ucsText.size())) {
// order matters
auto replacedChars = ucsText.substr(cursor + offset, nchar);
nchar = QString::fromUcs4(replacedChars.data(), replacedChars.size())
.size();
int start, len;
if (offset >= 0) {
start = cursor;
len = offset;
} else {
start = cursor + offset;
len = -offset;
}
auto prefixedChars = ucsText.substr(start, len);
offset = QString::fromUcs4(prefixedChars.data(), prefixedChars.size())
.size() *
(offset >= 0 ? 1 : -1);
event.setCommitString("", offset, nchar);
QCoreApplication::sendEvent(input, &event);
}
}
void QFcitxPlatformInputContext::forwardKey(unsigned int keyval,
unsigned int state, bool type) {
auto proxy = qobject_cast<HybridInputContext *>(sender());
if (!proxy) {
return;
}
FcitxQtICData &data = *static_cast<FcitxQtICData *>(
proxy->property("icData").value<void *>());
auto *w = data.window();
QObject *input = qGuiApp->focusObject();
auto window = focusWindowWrapper();
if (input && window && w == window) {
std::unique_ptr<QKeyEvent> keyevent{
createKeyEvent(keyval, state, type, data.event.get())};
forwardEvent(window, *keyevent);
}
}
void QFcitxPlatformInputContext::updateCurrentIM(const QString &name,
const QString &uniqueName,
const QString &langCode) {
Q_UNUSED(name);
Q_UNUSED(uniqueName);
QLocale newLocale(langCode);
if (locale_ != newLocale) {
locale_ = newLocale;
emitLocaleChanged();
}
}
void QFcitxPlatformInputContext::serverSideFocusOut() {
if (lastObject_ == focusObjectWrapper()) {
commitPreedit();
}
}
QLocale QFcitxPlatformInputContext::locale() const { return locale_; }
bool QFcitxPlatformInputContext::hasCapability(Capability) const {
return true;
}
void QFcitxPlatformInputContext::showInputPanel() {
auto *proxy = validIC();
if (proxy == nullptr) {
return;
}
proxy->showVirtualKeyboard();
}
void QFcitxPlatformInputContext::hideInputPanel() {
auto *proxy = validIC();
if (proxy == nullptr) {
return;
}
proxy->hideVirtualKeyboard();
}
bool QFcitxPlatformInputContext::isInputPanelVisible() const {
return inputPanelVisible_;
}
void QFcitxPlatformInputContext::updateInputPanelVisible() {
// We have to use two levels of cache here, one level is from
// DBus to proxy, another level is from proxy to the one read by Qt.
//
// Because the API is designed in a way that "input panel" visibility is a
// per-input context thing. We have to update the value when focus is
// changed.
bool oldVisible = inputPanelVisible_;
bool newVisible = false;
if (auto *proxy = validIC()) {
newVisible = proxy->isVirtualKeyboardVisible();
}
if (newVisible != oldVisible) {
inputPanelVisible_ = newVisible;
emitInputPanelVisibleChanged();
}
}
void QFcitxPlatformInputContext::createICData(QWindow *w) {
auto iter = icMap_.find(w);
if (iter == icMap_.end()) {
auto result =
icMap_.emplace(std::piecewise_construct, std::forward_as_tuple(w),
std::forward_as_tuple(this, w));
connect(w, &QObject::destroyed, this,
&QFcitxPlatformInputContext::windowDestroyed);
iter = result.first;
auto &data = iter->second;
if (QGuiApplication::platformName() == QLatin1String("xcb")) {
data.proxy->setDisplay("x11:");
} else if (QGuiApplication::platformName().startsWith("wayland")) {
data.proxy->setDisplay("wayland:");
}
connect(data.proxy, &HybridInputContext::inputContextCreated, this,
&QFcitxPlatformInputContext::createInputContextFinished);
connect(data.proxy, &HybridInputContext::commitString, this,
&QFcitxPlatformInputContext::commitString);
connect(data.proxy, &HybridInputContext::forwardKey, this,
&QFcitxPlatformInputContext::forwardKey);
connect(data.proxy, &HybridInputContext::updateFormattedPreedit, this,
&QFcitxPlatformInputContext::updateFormattedPreedit);
connect(data.proxy, &HybridInputContext::deleteSurroundingText, this,
&QFcitxPlatformInputContext::deleteSurroundingText);
connect(data.proxy, &HybridInputContext::currentIM, this,
&QFcitxPlatformInputContext::updateCurrentIM);
connect(data.proxy, &HybridInputContext::updateClientSideUI, this,
&QFcitxPlatformInputContext::updateClientSideUI);
connect(data.proxy, &HybridInputContext::notifyFocusOut, this,
&QFcitxPlatformInputContext::serverSideFocusOut);
connect(data.proxy,
&HybridInputContext::virtualKeyboardVisibilityChanged, this,
[this]() {
if (validIC() == sender()) {
updateInputPanelVisible();
}
});
}
}
QKeyEvent *QFcitxPlatformInputContext::createKeyEvent(unsigned int keyval,
unsigned int state,
bool isRelease,
const QKeyEvent *event) {
QKeyEvent *newEvent = nullptr;
state &= (~(1u << 31));
if (event && event->nativeVirtualKey() == keyval &&
event->nativeModifiers() == state &&
isRelease == (event->type() == QEvent::KeyRelease)) {
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
newEvent = new QKeyEvent(
event->type(), event->key(), event->modifiers(),
event->nativeScanCode(), event->nativeVirtualKey(),
event->nativeModifiers(), event->text(), event->isAutoRepeat(),
event->count(), event->device());
#else
newEvent = new QKeyEvent(*event);
#endif
} else {
Qt::KeyboardModifiers qstate = Qt::NoModifier;
int count = 1;
if (state & FcitxKeyState_Alt) {
qstate |= Qt::AltModifier;
count++;
}
if (state & FcitxKeyState_Shift) {
qstate |= Qt::ShiftModifier;
count++;
}
if (state & FcitxKeyState_Ctrl) {
qstate |= Qt::ControlModifier;
count++;
}
char32_t unicode = xkb_keysym_to_utf32(keyval);
QString text;
if (unicode) {
text = QString::fromUcs4(&unicode, 1);
}
int key = keysymToQtKey(keyval, text);
newEvent =
new QKeyEvent(isRelease ? (QEvent::KeyRelease) : (QEvent::KeyPress),
key, qstate, 0, keyval, state, text, false, count);
if (event) {
newEvent->setTimestamp(event->timestamp());
}
}
return newEvent;
}
void QFcitxPlatformInputContext::forwardEvent(QWindow *window,
const QKeyEvent &keyEvent) {
// use same variable name as in QXcbKeyboard::handleKeyEvent
QEvent::Type type = keyEvent.type();
int qtcode = keyEvent.key();
Qt::KeyboardModifiers modifiers = keyEvent.modifiers();
quint32 code = keyEvent.nativeScanCode();
quint32 sym = keyEvent.nativeVirtualKey();
quint32 state = keyEvent.nativeModifiers();
QString string = keyEvent.text();
bool isAutoRepeat = keyEvent.isAutoRepeat();