diff options
Diffstat (limited to 'src/plugins/platforminputcontexts/compose/qcomposeplatforminputcontext.cpp')
| -rw-r--r-- | src/plugins/platforminputcontexts/compose/qcomposeplatforminputcontext.cpp | 297 |
1 files changed, 78 insertions, 219 deletions
diff --git a/src/plugins/platforminputcontexts/compose/qcomposeplatforminputcontext.cpp b/src/plugins/platforminputcontexts/compose/qcomposeplatforminputcontext.cpp index 81a730232c..4e9828663f 100644 --- a/src/plugins/platforminputcontexts/compose/qcomposeplatforminputcontext.cpp +++ b/src/plugins/platforminputcontexts/compose/qcomposeplatforminputcontext.cpp @@ -1,6 +1,6 @@ /**************************************************************************** ** -** Copyright (C) 2016 The Qt Company Ltd. +** Copyright (C) 2019 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the plugins of the Qt Toolkit. @@ -36,131 +36,110 @@ ** $QT_END_LICENSE$ ** ****************************************************************************/ - #include "qcomposeplatforminputcontext.h" #include <QtCore/QCoreApplication> #include <QtGui/QKeyEvent> -#include <QtCore/QDebug> +#include <QtGui/QGuiApplication> -#include <algorithm> +#include <locale.h> QT_BEGIN_NAMESPACE -//#define DEBUG_COMPOSING +Q_LOGGING_CATEGORY(lcXkbCompose, "qt.xkb.compose") -static const int ignoreKeys[] = { - Qt::Key_Shift, - Qt::Key_Control, - Qt::Key_Meta, - Qt::Key_Alt, - Qt::Key_CapsLock, - Qt::Key_Super_L, - Qt::Key_Super_R, - Qt::Key_Hyper_L, - Qt::Key_Hyper_R, - Qt::Key_Mode_switch -}; +QComposeInputContext::QComposeInputContext() +{ + setObjectName(QStringLiteral("QComposeInputContext")); + qCDebug(lcXkbCompose, "using xkb compose input context"); +} -static const int composingKeys[] = { - Qt::Key_Multi_key, - Qt::Key_Dead_Grave, - Qt::Key_Dead_Acute, - Qt::Key_Dead_Circumflex, - Qt::Key_Dead_Tilde, - Qt::Key_Dead_Macron, - Qt::Key_Dead_Breve, - Qt::Key_Dead_Abovedot, - Qt::Key_Dead_Diaeresis, - Qt::Key_Dead_Abovering, - Qt::Key_Dead_Doubleacute, - Qt::Key_Dead_Caron, - Qt::Key_Dead_Cedilla, - Qt::Key_Dead_Ogonek, - Qt::Key_Dead_Iota, - Qt::Key_Dead_Voiced_Sound, - Qt::Key_Dead_Semivoiced_Sound, - Qt::Key_Dead_Belowdot, - Qt::Key_Dead_Hook, - Qt::Key_Dead_Horn, - Qt::Key_Dead_Stroke, - Qt::Key_Dead_Abovecomma, - Qt::Key_Dead_Abovereversedcomma, - Qt::Key_Dead_Doublegrave, - Qt::Key_Dead_Belowring, - Qt::Key_Dead_Belowmacron, - Qt::Key_Dead_Belowcircumflex, - Qt::Key_Dead_Belowtilde, - Qt::Key_Dead_Belowbreve, - Qt::Key_Dead_Belowdiaeresis, - Qt::Key_Dead_Invertedbreve, - Qt::Key_Dead_Belowcomma, - Qt::Key_Dead_Currency, - Qt::Key_Dead_a, - Qt::Key_Dead_A, - Qt::Key_Dead_e, - Qt::Key_Dead_E, - Qt::Key_Dead_i, - Qt::Key_Dead_I, - Qt::Key_Dead_o, - Qt::Key_Dead_O, - Qt::Key_Dead_u, - Qt::Key_Dead_U, - Qt::Key_Dead_Small_Schwa, - Qt::Key_Dead_Capital_Schwa, - Qt::Key_Dead_Greek, - Qt::Key_Dead_Lowline, - Qt::Key_Dead_Aboveverticalline, - Qt::Key_Dead_Belowverticalline, - Qt::Key_Dead_Longsolidusoverlay -}; +QComposeInputContext::~QComposeInputContext() +{ + xkb_compose_state_unref(m_composeState); + xkb_compose_table_unref(m_composeTable); +} -QComposeInputContext::QComposeInputContext() - : m_tableState(TableGenerator::EmptyTable) - , m_compositionTableInitialized(false) +void QComposeInputContext::ensureInitialized() { - clearComposeBuffer(); + 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) { - const QKeyEvent *keyEvent = (const QKeyEvent *)event; - // should pass only the key presses - if (keyEvent->type() != QEvent::KeyPress) { + auto keyEvent = static_cast<const QKeyEvent *>(event); + if (keyEvent->type() != QEvent::KeyPress) return false; - } - // if there were errors when generating the compose table input - // context should not try to filter anything, simply return false - if (m_compositionTableInitialized && (m_tableState & TableGenerator::NoErrors) != TableGenerator::NoErrors) + if (!inputMethodAccepted()) return false; - int keyval = keyEvent->key(); - int keysym = 0; + // lazy initialization - we don't want to do this on an app startup + ensureInitialized(); - if (ignoreKey(keyval)) + if (!m_composeTable || !m_composeState) return false; - if (!composeKey(keyval) && keyEvent->text().isEmpty()) + 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()); - keysym = keyEvent->nativeVirtualKey(); + QInputMethodEvent event; + event.setCommitString(composedText); - int nCompose = 0; - while (nCompose < QT_KEYSEQUENCE_MAX_LEN && m_composeBuffer[nCompose] != 0) - nCompose++; + if (!m_focusObject && qApp) + m_focusObject = qApp->focusObject(); - if (nCompose == QT_KEYSEQUENCE_MAX_LEN) { - reset(); - nCompose = 0; - } + if (m_focusObject) + QCoreApplication::sendEvent(m_focusObject, &event); + else + qCWarning(lcXkbCompose, "no focus object"); - m_composeBuffer[nCompose] = keysym; - // check sequence - if (checkComposeTable()) + reset(); return true; - - return false; + } + case XKB_COMPOSE_NOTHING: + return false; + default: + Q_UNREACHABLE(); + return false; + } } bool QComposeInputContext::isValid() const @@ -175,7 +154,8 @@ void QComposeInputContext::setFocusObject(QObject *object) void QComposeInputContext::reset() { - clearComposeBuffer(); + if (m_composeState) + xkb_compose_state_reset(m_composeState); } void QComposeInputContext::update(Qt::InputMethodQueries q) @@ -183,125 +163,4 @@ void QComposeInputContext::update(Qt::InputMethodQueries q) QPlatformInputContext::update(q); } -static bool isDuplicate(const QComposeTableElement &lhs, const QComposeTableElement &rhs) -{ - return std::equal(lhs.keys, lhs.keys + QT_KEYSEQUENCE_MAX_LEN, - QT_MAKE_CHECKED_ARRAY_ITERATOR(rhs.keys, QT_KEYSEQUENCE_MAX_LEN)); -} - -bool QComposeInputContext::checkComposeTable() -{ - if (!m_compositionTableInitialized) { - TableGenerator reader; - m_tableState = reader.tableState(); - - m_compositionTableInitialized = true; - if ((m_tableState & TableGenerator::NoErrors) == TableGenerator::NoErrors) { - m_composeTable = reader.composeTable(); - } else { -#ifdef DEBUG_COMPOSING - qDebug( "### FAILED_PARSING ###" ); -#endif - // if we have errors, don' try to look things up anyways. - reset(); - return false; - } - } - Q_ASSERT(!m_composeTable.isEmpty()); - QVector<QComposeTableElement>::const_iterator it = - std::lower_bound(m_composeTable.constBegin(), m_composeTable.constEnd(), m_composeBuffer, ByKeys()); - - // prevent dereferencing an 'end' iterator, which would result in a crash - if (it == m_composeTable.constEnd()) - it -= 1; - - QComposeTableElement elem = *it; - // would be nicer if qLowerBound had API that tells if the item was actually found - if (m_composeBuffer[0] != elem.keys[0]) { -#ifdef DEBUG_COMPOSING - qDebug( "### no match ###" ); -#endif - reset(); - return false; - } - // check if compose buffer is matched - for (int i=0; i < QT_KEYSEQUENCE_MAX_LEN; i++) { - - // check if partial match - if (m_composeBuffer[i] == 0 && elem.keys[i]) { -#ifdef DEBUG_COMPOSING - qDebug("### partial match ###"); -#endif - return true; - } - - if (m_composeBuffer[i] != elem.keys[i]) { -#ifdef DEBUG_COMPOSING - qDebug("### different entry ###"); -#endif - reset(); - return i != 0; - } - } -#ifdef DEBUG_COMPOSING - qDebug("### match exactly ###"); -#endif - - // check if the key sequence is overwriten - see the comment in - // TableGenerator::orderComposeTable() - int next = 1; - do { - // if we are at the end of the table, then we have nothing to do here - if (it + next != m_composeTable.constEnd()) { - QComposeTableElement nextElem = *(it + next); - if (isDuplicate(elem, nextElem)) { - elem = nextElem; - next++; - continue; - } else { - break; - } - } - break; - } while (true); - - commitText(elem.value); - reset(); - - return true; -} - -void QComposeInputContext::commitText(uint character) const -{ - QInputMethodEvent event; - event.setCommitString(QChar(character)); - QCoreApplication::sendEvent(m_focusObject, &event); -} - -bool QComposeInputContext::ignoreKey(int keyval) const -{ - for (uint i = 0; i < (sizeof(ignoreKeys) / sizeof(ignoreKeys[0])); i++) - if (keyval == ignoreKeys[i]) - return true; - - return false; -} - -bool QComposeInputContext::composeKey(int keyval) const -{ - for (uint i = 0; i < (sizeof(composingKeys) / sizeof(composingKeys[0])); i++) - if (keyval == composingKeys[i]) - return true; - - return false; -} - -void QComposeInputContext::clearComposeBuffer() -{ - for (uint i=0; i < (sizeof(m_composeBuffer) / sizeof(int)); i++) - m_composeBuffer[i] = 0; -} - -QComposeInputContext::~QComposeInputContext() {} - QT_END_NAMESPACE |