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| ** Copyright (C) 2019 The Qt Company Ltd. |
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| ** This file is part of the plugins of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| #include "qcomposeplatforminputcontext.h" |
| |
| #include <QtCore/QCoreApplication> |
| #include <QtGui/QKeyEvent> |
| #include <QtGui/QGuiApplication> |
| |
| #include <locale.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| Q_LOGGING_CATEGORY(lcXkbCompose, "qt.xkb.compose") |
| |
| QComposeInputContext::QComposeInputContext() |
| { |
| setObjectName(QStringLiteral("QComposeInputContext")); |
| qCDebug(lcXkbCompose, "using xkb compose input context"); |
| } |
| |
| QComposeInputContext::~QComposeInputContext() |
| { |
| xkb_compose_state_unref(m_composeState); |
| xkb_compose_table_unref(m_composeTable); |
| } |
| |
| void QComposeInputContext::ensureInitialized() |
| { |
| if (m_initialized) |
| return; |
| |
| if (!m_XkbContext) { |
| qCWarning(lcXkbCompose) << "error: xkb context has not been set on" << metaObject()->className(); |
| return; |
| } |
| |
| m_initialized = true; |
| const char *locale = setlocale(LC_CTYPE, ""); |
| if (!locale) |
| locale = setlocale(LC_CTYPE, nullptr); |
| qCDebug(lcXkbCompose) << "detected locale (LC_CTYPE):" << locale; |
| |
| m_composeTable = xkb_compose_table_new_from_locale(m_XkbContext, locale, XKB_COMPOSE_COMPILE_NO_FLAGS); |
| if (m_composeTable) |
| m_composeState = xkb_compose_state_new(m_composeTable, XKB_COMPOSE_STATE_NO_FLAGS); |
| |
| if (!m_composeTable) { |
| qCWarning(lcXkbCompose, "failed to create compose table"); |
| return; |
| } |
| if (!m_composeState) { |
| qCWarning(lcXkbCompose, "failed to create compose state"); |
| return; |
| } |
| } |
| |
| bool QComposeInputContext::filterEvent(const QEvent *event) |
| { |
| auto keyEvent = static_cast<const QKeyEvent *>(event); |
| if (keyEvent->type() != QEvent::KeyPress) |
| return false; |
| |
| if (!inputMethodAccepted()) |
| return false; |
| |
| // lazy initialization - we don't want to do this on an app startup |
| ensureInitialized(); |
| |
| if (!m_composeTable || !m_composeState) |
| return false; |
| |
| xkb_compose_state_feed(m_composeState, keyEvent->nativeVirtualKey()); |
| |
| switch (xkb_compose_state_get_status(m_composeState)) { |
| case XKB_COMPOSE_COMPOSING: |
| return true; |
| case XKB_COMPOSE_CANCELLED: |
| reset(); |
| return false; |
| case XKB_COMPOSE_COMPOSED: |
| { |
| const int size = xkb_compose_state_get_utf8(m_composeState, nullptr, 0); |
| QVarLengthArray<char, 32> buffer(size + 1); |
| xkb_compose_state_get_utf8(m_composeState, buffer.data(), buffer.size()); |
| QString composedText = QString::fromUtf8(buffer.constData()); |
| |
| QInputMethodEvent event; |
| event.setCommitString(composedText); |
| |
| if (!m_focusObject && qApp) |
| m_focusObject = qApp->focusObject(); |
| |
| if (m_focusObject) |
| QCoreApplication::sendEvent(m_focusObject, &event); |
| else |
| qCWarning(lcXkbCompose, "no focus object"); |
| |
| reset(); |
| return true; |
| } |
| case XKB_COMPOSE_NOTHING: |
| return false; |
| default: |
| Q_UNREACHABLE(); |
| return false; |
| } |
| } |
| |
| bool QComposeInputContext::isValid() const |
| { |
| return true; |
| } |
| |
| void QComposeInputContext::setFocusObject(QObject *object) |
| { |
| m_focusObject = object; |
| } |
| |
| void QComposeInputContext::reset() |
| { |
| if (m_composeState) |
| xkb_compose_state_reset(m_composeState); |
| } |
| |
| void QComposeInputContext::update(Qt::InputMethodQueries q) |
| { |
| QPlatformInputContext::update(q); |
| } |
| |
| QT_END_NAMESPACE |