qwaylandtextinputv4.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qwaylandtextinputv4.h"
#include "qwaylandtextinputv4_p.h"
 
#include <QtWaylandCompositor/QWaylandCompositor>
#include <QtWaylandCompositor/private/qwaylandseat_p.h>
 
#include "qwaylandsurface.h"
#include "qwaylandview.h"
#include "qwaylandinputmethodeventbuilder_p.h"
 
#include <QGuiApplication>
#include <QInputMethodEvent>
#include <qpa/qwindowsysteminterface.h>
 
#if QT_CONFIG(xkbcommon)
#include <QtGui/private/qxkbcommon_p.h>
#endif
 
QT_BEGIN_NAMESPACE
 
Q_DECLARE_LOGGING_CATEGORY(qLcWaylandCompositorTextInput)
 
QWaylandTextInputV4ClientState::QWaylandTextInputV4ClientState()
{
}
 
Qt::InputMethodQueries QWaylandTextInputV4ClientState::updatedQueries(const QWaylandTextInputV4ClientState &other) const
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Qt::InputMethodQueries queries;
 
    if (hints != other.hints)
        queries |= Qt::ImHints;
    if (cursorRectangle != other.cursorRectangle)
        queries |= Qt::ImCursorRectangle;
    if (surroundingText != other.surroundingText)
        queries |= Qt::ImSurroundingText | Qt::ImCurrentSelection;
    if (cursorPosition != other.cursorPosition)
        queries |= Qt::ImCursorPosition | Qt::ImCurrentSelection;
    if (anchorPosition != other.anchorPosition)
        queries |= Qt::ImAnchorPosition | Qt::ImCurrentSelection;
 
    return queries;
}
 
Qt::InputMethodQueries QWaylandTextInputV4ClientState::mergeChanged(const QWaylandTextInputV4ClientState &other) {
 
    Qt::InputMethodQueries queries;
 
    if ((other.changedState & Qt::ImHints) && hints != other.hints) {
        hints = other.hints;
        queries |= Qt::ImHints;
    }
 
    if ((other.changedState & Qt::ImCursorRectangle) && cursorRectangle != other.cursorRectangle) {
        cursorRectangle = other.cursorRectangle;
        queries |= Qt::ImCursorRectangle;
    }
 
    if ((other.changedState & Qt::ImSurroundingText) && surroundingText != other.surroundingText) {
        surroundingText = other.surroundingText;
        queries |= Qt::ImSurroundingText | Qt::ImCurrentSelection;
    }
 
    if ((other.changedState & Qt::ImCursorPosition) && cursorPosition != other.cursorPosition) {
        cursorPosition = other.cursorPosition;
        queries |= Qt::ImCursorPosition | Qt::ImCurrentSelection;
    }
 
    if ((other.changedState & Qt::ImAnchorPosition) && anchorPosition != other.anchorPosition) {
        anchorPosition = other.anchorPosition;
        queries |= Qt::ImAnchorPosition | Qt::ImCurrentSelection;
    }
 
    return queries;
}
 
QWaylandTextInputV4Private::QWaylandTextInputV4Private(QWaylandCompositor *compositor)
    : compositor(compositor)
    , currentState(new QWaylandTextInputV4ClientState)
    , pendingState(new QWaylandTextInputV4ClientState)
{
}
 
void QWaylandTextInputV4Private::sendInputMethodEvent(QInputMethodEvent *event)
{
    Q_Q(QWaylandTextInputV4);
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    if (!focusResource || !focusResource->handle)
        return;
 
    bool needsDone = false;
 
    const QString &newPreeditString = event->preeditString();
 
    // Current cursor shape is only line. It means both cursorBegin
    // and cursorEnd will be the same values.
    int32_t preeditCursorPos = newPreeditString.length();
 
    if (event->replacementLength() > 0 || event->replacementStart() < 0) {
        if (event->replacementStart() <= 0 && (event->replacementLength() >= -event->replacementStart())) {
            const int selectionStart = qMin(currentState->cursorPosition, currentState->anchorPosition);
            const int selectionEnd = qMax(currentState->cursorPosition, currentState->anchorPosition);
            const int before = QWaylandInputMethodEventBuilder::indexToWayland(currentState->surroundingText, -event->replacementStart(), selectionStart + event->replacementStart());
            const int after = QWaylandInputMethodEventBuilder::indexToWayland(currentState->surroundingText, event->replacementLength() + event->replacementStart(), selectionEnd);
            send_delete_surrounding_text(focusResource->handle, before, after);
            needsDone = true;
        } else {
            qCWarning(qLcWaylandCompositorTextInput) << "Not yet supported case of replacement. Start:" << event->replacementStart() << "length:" << event->replacementLength();
        }
        preeditCursorPos = event->replacementStart() + event->replacementLength();
    }
 
    if (currentPreeditString != newPreeditString) {
        currentPreeditString = newPreeditString;
        send_preedit_string(focusResource->handle, currentPreeditString, preeditCursorPos, preeditCursorPos);
        needsDone = true;
    }
    if (!event->commitString().isEmpty()) {
        send_commit_string(focusResource->handle, event->commitString());
        needsDone = true;
    }
 
    if (needsDone)
        send_done(focusResource->handle, serial);
}
 
 
void QWaylandTextInputV4Private::sendKeyEvent(QKeyEvent *event)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_Q(QWaylandTextInputV4);
 
    if (!focusResource || !focusResource->handle)
        return;
 
    send_commit_string(focusResource->handle, event->text());
 
    send_done(focusResource->handle, serial);
}
 
QVariant QWaylandTextInputV4Private::inputMethodQuery(Qt::InputMethodQuery property, QVariant argument) const
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO << property;
 
    switch (property) {
    case Qt::ImHints:
        return QVariant(static_cast<int>(currentState->hints));
    case Qt::ImCursorRectangle:
        return currentState->cursorRectangle;
    case Qt::ImFont:
        // Not supported
        return QVariant();
    case Qt::ImCursorPosition:
        qCDebug(qLcWaylandCompositorTextInput) << currentState->cursorPosition;
        return currentState->cursorPosition;
    case Qt::ImSurroundingText:
        qCDebug(qLcWaylandCompositorTextInput) << currentState->surroundingText;
        return currentState->surroundingText;
    case Qt::ImCurrentSelection:
        return currentState->surroundingText.mid(qMin(currentState->cursorPosition, currentState->anchorPosition),
                                                 qAbs(currentState->anchorPosition - currentState->cursorPosition));
    case Qt::ImMaximumTextLength:
        // Not supported
        return QVariant();
    case Qt::ImAnchorPosition:
        qCDebug(qLcWaylandCompositorTextInput) << currentState->anchorPosition;
        return currentState->anchorPosition;
    case Qt::ImAbsolutePosition:
        // We assume the surrounding text is our whole document for now
        return currentState->cursorPosition;
    case Qt::ImTextAfterCursor:
        if (argument.isValid())
            return currentState->surroundingText.mid(currentState->cursorPosition, argument.toInt());
        return currentState->surroundingText.mid(currentState->cursorPosition);
    case Qt::ImTextBeforeCursor:
        if (argument.isValid())
            return currentState->surroundingText.left(currentState->cursorPosition).right(argument.toInt());
        return currentState->surroundingText.left(currentState->cursorPosition);
 
    default:
        return QVariant();
    }
}
 
void QWaylandTextInputV4Private::setFocus(QWaylandSurface *surface)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
    Q_Q(QWaylandTextInputV4);
 
    if (focusResource && focus) {
        // sync before leave
        // IBUS commits by itself but qtvirtualkeyboard doesn't
        // And when handling chinese input, it is required to commit
        // before leaving the focus.
        if (qgetenv("QT_IM_MODULE") != QByteArrayLiteral("ibus")
                || qApp->inputMethod()->locale().language() == QLocale::Chinese) {
            qApp->inputMethod()->commit();
        }
 
        qApp->inputMethod()->hide();
        inputPanelVisible = false;
        send_leave(focusResource->handle, focus->resource());
        currentPreeditString.clear();
    }
 
    if (focus != surface)
        focusDestroyListener.reset();
 
    Resource *resource = surface ? resourceMap().value(surface->waylandClient()) : 0;
    if (resource && surface) {
        send_enter(resource->handle, surface->resource());
 
        if (focus != surface)
            focusDestroyListener.listenForDestruction(surface->resource());
    }
 
    focus = surface;
    focusResource = resource;
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_bind_resource(Resource *resource)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_UNUSED(resource);
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_destroy_resource(Resource *resource)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    if (focusResource == resource)
        focusResource = nullptr;
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_destroy(Resource *resource)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    wl_resource_destroy(resource->handle);
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_enable(Resource *resource)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_Q(QWaylandTextInputV4);
 
    pendingState.reset(new QWaylandTextInputV4ClientState);
 
    enabledSurfaces.insert(resource, focus);
    emit q->surfaceEnabled(focus);
 
    serial = 0;
    inputPanelVisible = true;
    qApp->inputMethod()->show();
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_disable(QtWaylandServer::zwp_text_input_v4::Resource *resource)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_Q(QWaylandTextInputV4);
 
    QWaylandSurface *s = enabledSurfaces.take(resource);
    emit q->surfaceDisabled(s);
 
    // When reselecting a word by setFocus
    if (qgetenv("QT_IM_MODULE") != QByteArrayLiteral("ibus")
            || qApp->inputMethod()->locale().language() == QLocale::Chinese) {
        qApp->inputMethod()->commit();
    }
    qApp->inputMethod()->reset();
    pendingState.reset(new QWaylandTextInputV4ClientState);
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_set_cursor_rectangle(Resource *resource, int32_t x, int32_t y, int32_t width, int32_t height)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO << x << y << width << height;
 
    Q_Q(QWaylandTextInputV4);
 
    if (resource != focusResource)
        return;
 
    pendingState->cursorRectangle = QRect(x, y, width, height);
 
    pendingState->changedState |= Qt::ImCursorRectangle;
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_commit(Resource *resource)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_Q(QWaylandTextInputV4);
 
    if (resource != focusResource) {
        qCDebug(qLcWaylandCompositorTextInput) << "OBS: Disabled surface!!";
        return;
    }
 
    serial = serial < UINT_MAX ? serial + 1U : 0U;
 
    // Just increase serials and ignore empty commits
    if (!pendingState->changedState) {
        qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO << "pendingState is not changed";
        return;
    }
 
    // Selection starts.
    // But since qtvirtualkeyboard with hunspell does not reset its preedit string,
    // compositor forces to reset inputMethod.
    if ((currentState->cursorPosition == currentState->anchorPosition)
            && (pendingState->cursorPosition != pendingState->anchorPosition))
        qApp->inputMethod()->reset();
 
    // Enable reselection
    // This is a workaround to make qtvirtualkeyboad's state empty by clearing State::InputMethodClick.
    if (currentState->surroundingText == pendingState->surroundingText && currentState->cursorPosition != pendingState->cursorPosition)
        qApp->inputMethod()->invokeAction(QInputMethod::Click, pendingState->cursorPosition);
 
    Qt::InputMethodQueries queries = currentState->mergeChanged(*pendingState.data());
    pendingState.reset(new QWaylandTextInputV4ClientState);
 
    if (queries) {
        qCDebug(qLcWaylandCompositorTextInput) << "QInputMethod::update() after commit with" << queries;
 
        qApp->inputMethod()->update(queries);
    }
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_set_content_type(Resource *resource, uint32_t hint, uint32_t purpose)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO << hint << purpose;
 
    if (resource != focusResource)
        return;
 
    pendingState->hints = Qt::ImhNone;
 
    if ((hint & content_hint_completion) == 0)
        pendingState->hints |= Qt::ImhNoPredictiveText;
    if ((hint & content_hint_auto_capitalization) == 0)
        pendingState->hints |= Qt::ImhNoAutoUppercase;
    if ((hint & content_hint_lowercase) != 0)
        pendingState->hints |= Qt::ImhPreferLowercase;
    if ((hint & content_hint_uppercase) != 0)
        pendingState->hints |= Qt::ImhPreferUppercase;
    if ((hint & content_hint_hidden_text) != 0)
        pendingState->hints |= Qt::ImhHiddenText;
    if ((hint & content_hint_sensitive_data) != 0)
        pendingState->hints |= Qt::ImhSensitiveData;
    if ((hint & content_hint_latin) != 0)
        pendingState->hints |= Qt::ImhLatinOnly;
    if ((hint & content_hint_multiline) != 0)
        pendingState->hints |= Qt::ImhMultiLine;
 
    switch (purpose) {
    case content_purpose_normal:
        break;
    case content_purpose_alpha:
        pendingState->hints |= Qt::ImhUppercaseOnly | Qt::ImhLowercaseOnly;
        break;
    case content_purpose_digits:
        pendingState->hints |= Qt::ImhDigitsOnly;
        break;
    case content_purpose_number:
        pendingState->hints |= Qt::ImhFormattedNumbersOnly;
        break;
    case content_purpose_phone:
        pendingState->hints |= Qt::ImhDialableCharactersOnly;
        break;
    case content_purpose_url:
        pendingState->hints |= Qt::ImhUrlCharactersOnly;
        break;
    case content_purpose_email:
        pendingState->hints |= Qt::ImhEmailCharactersOnly;
        break;
    case content_purpose_name:
    case content_purpose_password:
        break;
    case content_purpose_date:
        pendingState->hints |= Qt::ImhDate;
        break;
    case content_purpose_time:
        pendingState->hints |= Qt::ImhTime;
        break;
    case content_purpose_datetime:
        pendingState->hints |= Qt::ImhDate | Qt::ImhTime;
        break;
    case content_purpose_terminal:
    default:
        break;
    }
 
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO << pendingState->hints;
 
    pendingState->changedState |= Qt::ImHints;
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_set_surrounding_text(Resource *resource, const QString &text, int32_t cursor, int32_t anchor)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO << text << cursor << anchor;
 
    if (resource != focusResource)
        return;
 
    pendingState->surroundingText = text;
    pendingState->cursorPosition = QWaylandInputMethodEventBuilder::indexFromWayland(text, cursor);
    pendingState->anchorPosition = QWaylandInputMethodEventBuilder::indexFromWayland(text, anchor);
 
    pendingState->changedState |= Qt::ImSurroundingText | Qt::ImCursorPosition | Qt::ImAnchorPosition;
}
 
void QWaylandTextInputV4Private::zwp_text_input_v4_set_text_change_cause(Resource *resource, uint32_t cause)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_UNUSED(resource);
    Q_UNUSED(cause);
}
 
QWaylandTextInputV4::QWaylandTextInputV4(QWaylandObject *container, QWaylandCompositor *compositor)
    : QWaylandCompositorExtensionTemplate(container, *new QWaylandTextInputV4Private(compositor))
{
    connect(&d_func()->focusDestroyListener, &QWaylandDestroyListener::fired,
            this, &QWaylandTextInputV4::focusSurfaceDestroyed);
}
 
QWaylandTextInputV4::~QWaylandTextInputV4()
{
}
 
void QWaylandTextInputV4::sendInputMethodEvent(QInputMethodEvent *event)
{
    Q_D(QWaylandTextInputV4);
 
    d->sendInputMethodEvent(event);
}
 
void QWaylandTextInputV4::sendKeyEvent(QKeyEvent *event)
{
    Q_D(QWaylandTextInputV4);
 
    d->sendKeyEvent(event);
}
 
QVariant QWaylandTextInputV4::inputMethodQuery(Qt::InputMethodQuery property, QVariant argument) const
{
    const Q_D(QWaylandTextInputV4);
 
    return d->inputMethodQuery(property, argument);
}
 
QWaylandSurface *QWaylandTextInputV4::focus() const
{
    const Q_D(QWaylandTextInputV4);
 
    return d->focus;
}
 
void QWaylandTextInputV4::setFocus(QWaylandSurface *surface)
{
    Q_D(QWaylandTextInputV4);
 
    d->setFocus(surface);
}
 
void QWaylandTextInputV4::focusSurfaceDestroyed(void *)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_D(QWaylandTextInputV4);
 
    d->focusDestroyListener.reset();
 
    d->focus = nullptr;
    d->focusResource = nullptr;
}
 
bool QWaylandTextInputV4::isSurfaceEnabled(QWaylandSurface *surface) const
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    const Q_D(QWaylandTextInputV4);
 
    return d->enabledSurfaces.values().contains(surface);
}
 
void QWaylandTextInputV4::add(::wl_client *client, uint32_t id, int version)
{
    qCDebug(qLcWaylandCompositorTextInput) << Q_FUNC_INFO;
 
    Q_D(QWaylandTextInputV4);
 
    d->add(client, id, version);
}
 
const wl_interface *QWaylandTextInputV4::interface()
{
    return QWaylandTextInputV4Private::interface();
}
 
QByteArray QWaylandTextInputV4::interfaceName()
{
    return QWaylandTextInputV4Private::interfaceName();
}
 
QT_END_NAMESPACE