554 lines
18 KiB
C++
554 lines
18 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2013, 2016, 2017 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "xkb.h"
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#include "xkb_qt_mapping.h"
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#include "utils.h"
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// frameworks
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#include <KConfigGroup>
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// KWayland
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#include <KWaylandServer/seat_interface.h>
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// Qt
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#include <QTemporaryFile>
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#include <QKeyEvent>
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// xkbcommon
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#include <xkbcommon/xkbcommon.h>
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#include <xkbcommon/xkbcommon-compose.h>
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#include <xkbcommon/xkbcommon-keysyms.h>
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// system
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#include <sys/mman.h>
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#include <unistd.h>
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#include <bitset>
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Q_LOGGING_CATEGORY(KWIN_XKB, "kwin_xkbcommon", QtCriticalMsg)
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namespace KWin
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{
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static void xkbLogHandler(xkb_context *context, xkb_log_level priority, const char *format, va_list args)
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{
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Q_UNUSED(context)
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char buf[1024];
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int length = std::vsnprintf(buf, 1023, format, args);
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while (length > 0 && std::isspace(buf[length - 1])) {
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--length;
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}
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if (length <= 0) {
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return;
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}
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switch (priority) {
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case XKB_LOG_LEVEL_DEBUG:
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qCDebug(KWIN_XKB, "XKB: %.*s", length, buf);
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break;
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case XKB_LOG_LEVEL_INFO:
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qCInfo(KWIN_XKB, "XKB: %.*s", length, buf);
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break;
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case XKB_LOG_LEVEL_WARNING:
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qCWarning(KWIN_XKB, "XKB: %.*s", length, buf);
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break;
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case XKB_LOG_LEVEL_ERROR:
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case XKB_LOG_LEVEL_CRITICAL:
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default:
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qCCritical(KWIN_XKB, "XKB: %.*s", length, buf);
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break;
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}
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}
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Xkb::Xkb(QObject *parent)
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: QObject(parent)
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, m_context(xkb_context_new(XKB_CONTEXT_NO_FLAGS))
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, m_keymap(nullptr)
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, m_state(nullptr)
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, m_shiftModifier(0)
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, m_capsModifier(0)
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, m_controlModifier(0)
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, m_altModifier(0)
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, m_metaModifier(0)
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, m_numModifier(0)
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, m_numLock(0)
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, m_capsLock(0)
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, m_scrollLock(0)
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, m_modifiers(Qt::NoModifier)
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, m_consumedModifiers(Qt::NoModifier)
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, m_keysym(XKB_KEY_NoSymbol)
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, m_leds()
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{
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qRegisterMetaType<KWin::Xkb::LEDs>();
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if (!m_context) {
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qCDebug(KWIN_XKB) << "Could not create xkb context";
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} else {
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xkb_context_set_log_level(m_context, XKB_LOG_LEVEL_DEBUG);
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xkb_context_set_log_fn(m_context, &xkbLogHandler);
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// get locale as described in xkbcommon doc
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// cannot use QLocale as it drops the modifier part
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QByteArray locale = qgetenv("LC_ALL");
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if (locale.isEmpty()) {
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locale = qgetenv("LC_CTYPE");
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}
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if (locale.isEmpty()) {
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locale = qgetenv("LANG");
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}
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if (locale.isEmpty()) {
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locale = QByteArrayLiteral("C");
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}
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m_compose.table = xkb_compose_table_new_from_locale(m_context, locale.constData(), XKB_COMPOSE_COMPILE_NO_FLAGS);
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if (m_compose.table) {
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m_compose.state = xkb_compose_state_new(m_compose.table, XKB_COMPOSE_STATE_NO_FLAGS);
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}
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}
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}
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Xkb::~Xkb()
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{
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xkb_compose_state_unref(m_compose.state);
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xkb_compose_table_unref(m_compose.table);
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xkb_state_unref(m_state);
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xkb_keymap_unref(m_keymap);
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xkb_context_unref(m_context);
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}
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void Xkb::reconfigure()
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{
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if (!m_context) {
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return;
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}
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xkb_keymap *keymap = nullptr;
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if (!qEnvironmentVariableIsSet("KWIN_XKB_DEFAULT_KEYMAP")) {
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keymap = loadKeymapFromConfig();
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}
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if (!keymap) {
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qCDebug(KWIN_XKB) << "Could not create xkb keymap from configuration";
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keymap = loadDefaultKeymap();
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}
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if (keymap) {
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updateKeymap(keymap);
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} else {
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qCDebug(KWIN_XKB) << "Could not create default xkb keymap";
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}
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}
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static bool stringIsEmptyOrNull(const char *str)
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{
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return str == nullptr || str[0] == '\0';
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}
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/**
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* libxkbcommon uses secure_getenv to read the XKB_DEFAULT_* variables.
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* As kwin_wayland may have the CAP_SET_NICE capability, it returns nullptr
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* so we need to do it ourselves (see xkb_context_sanitize_rule_names).
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**/
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static void applyEnvironmentRules(xkb_rule_names &ruleNames)
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{
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if (stringIsEmptyOrNull(ruleNames.rules)) {
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ruleNames.rules = getenv("XKB_DEFAULT_RULES");
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}
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if (stringIsEmptyOrNull(ruleNames.model)) {
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ruleNames.model = getenv("XKB_DEFAULT_MODEL");
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}
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if (stringIsEmptyOrNull(ruleNames.layout)) {
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ruleNames.layout = getenv("XKB_DEFAULT_LAYOUT");
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ruleNames.variant = getenv("XKB_DEFAULT_VARIANT");
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}
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if (ruleNames.options == nullptr) {
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ruleNames.options = getenv("XKB_DEFAULT_OPTIONS");
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}
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}
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xkb_keymap *Xkb::loadKeymapFromConfig()
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{
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// load config
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if (!m_config) {
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return nullptr;
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}
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const KConfigGroup config = m_config->group("Layout");
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const QByteArray model = config.readEntry("Model", "pc104").toLocal8Bit();
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const QByteArray layout = config.readEntry("LayoutList", "").toLocal8Bit();
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const QByteArray options = config.readEntry("Options", "").toLocal8Bit();
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xkb_rule_names ruleNames = {
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.rules = nullptr,
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.model = model.constData(),
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.layout = layout.constData(),
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.variant = nullptr,
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.options = options.constData()
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};
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applyEnvironmentRules(ruleNames);
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return xkb_keymap_new_from_names(m_context, &ruleNames, XKB_KEYMAP_COMPILE_NO_FLAGS);
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}
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xkb_keymap *Xkb::loadDefaultKeymap()
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{
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xkb_rule_names ruleNames = {};
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applyEnvironmentRules(ruleNames);
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return xkb_keymap_new_from_names(m_context, &ruleNames, XKB_KEYMAP_COMPILE_NO_FLAGS);
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}
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void Xkb::installKeymap(int fd, uint32_t size)
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{
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if (!m_context) {
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return;
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}
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char *map = reinterpret_cast<char*>(mmap(nullptr, size, PROT_READ, MAP_SHARED, fd, 0));
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if (map == MAP_FAILED) {
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return;
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}
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xkb_keymap *keymap = xkb_keymap_new_from_string(m_context, map, XKB_KEYMAP_FORMAT_TEXT_V1, XKB_MAP_COMPILE_PLACEHOLDER);
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munmap(map, size);
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if (!keymap) {
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qCDebug(KWIN_XKB) << "Could not map keymap from file";
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return;
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}
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m_ownership = Ownership::Client;
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updateKeymap(keymap);
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}
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void Xkb::updateKeymap(xkb_keymap *keymap)
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{
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Q_ASSERT(keymap);
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xkb_state *state = xkb_state_new(keymap);
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if (!state) {
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qCDebug(KWIN_XKB) << "Could not create XKB state";
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xkb_keymap_unref(keymap);
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return;
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}
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// now release the old ones
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xkb_state_unref(m_state);
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xkb_keymap_unref(m_keymap);
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m_keymap = keymap;
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m_state = state;
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m_shiftModifier = xkb_keymap_mod_get_index(m_keymap, XKB_MOD_NAME_SHIFT);
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m_capsModifier = xkb_keymap_mod_get_index(m_keymap, XKB_MOD_NAME_CAPS);
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m_controlModifier = xkb_keymap_mod_get_index(m_keymap, XKB_MOD_NAME_CTRL);
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m_altModifier = xkb_keymap_mod_get_index(m_keymap, XKB_MOD_NAME_ALT);
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m_metaModifier = xkb_keymap_mod_get_index(m_keymap, XKB_MOD_NAME_LOGO);
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m_numModifier = xkb_keymap_mod_get_index(m_keymap, XKB_MOD_NAME_NUM);
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m_numLock = xkb_keymap_led_get_index(m_keymap, XKB_LED_NAME_NUM);
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m_capsLock = xkb_keymap_led_get_index(m_keymap, XKB_LED_NAME_CAPS);
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m_scrollLock = xkb_keymap_led_get_index(m_keymap, XKB_LED_NAME_SCROLL);
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m_currentLayout = xkb_state_serialize_layout(m_state, XKB_STATE_LAYOUT_EFFECTIVE);
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m_modifierState.depressed = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_DEPRESSED));
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m_modifierState.latched = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LATCHED));
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m_modifierState.locked = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LOCKED));
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static bool s_startup = true;
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if (s_startup || qEnvironmentVariableIsSet("KWIN_FORCE_NUM_LOCK_EVALUATION")) {
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s_startup = false;
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if (m_ownership == Ownership::Server && m_numModifier != XKB_MOD_INVALID && m_numLockConfig) {
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const KConfigGroup config = m_numLockConfig->group("Keyboard");
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// STATE_ON = 0, STATE_OFF = 1, STATE_UNCHANGED = 2, see plasma-desktop/kcms/keyboard/kcmmisc.h
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const auto setting = config.readEntry("NumLock", 2);
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const bool numLockIsOn = xkb_state_mod_index_is_active(m_state, m_numModifier, XKB_STATE_MODS_LOCKED);
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if ((setting == 0 && !numLockIsOn) || (setting == 1 && numLockIsOn)) {
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std::bitset<sizeof(xkb_mod_mask_t)*8> mask{m_modifierState.locked};
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if (mask.size() > m_numModifier) {
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mask[m_numModifier] = (setting == 0);
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m_modifierState.locked = mask.to_ulong();
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xkb_state_update_mask(m_state, m_modifierState.depressed, m_modifierState.latched, m_modifierState.locked, 0, 0, m_currentLayout);
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m_modifierState.locked = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LOCKED));
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}
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}
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}
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}
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createKeymapFile();
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forwardModifiers();
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updateModifiers();
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}
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void Xkb::createKeymapFile()
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{
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if (!m_seat || !m_seat->keyboard()) {
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return;
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}
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// TODO: uninstall keymap on server?
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if (!m_keymap) {
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return;
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}
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ScopedCPointer<char> keymapString(xkb_keymap_get_as_string(m_keymap, XKB_KEYMAP_FORMAT_TEXT_V1));
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if (keymapString.isNull()) {
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return;
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}
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m_seat->keyboard()->setKeymap(keymapString.data());
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}
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void Xkb::updateModifiers(uint32_t modsDepressed, uint32_t modsLatched, uint32_t modsLocked, uint32_t group)
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{
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if (!m_keymap || !m_state) {
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return;
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}
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xkb_state_update_mask(m_state, modsDepressed, modsLatched, modsLocked, 0, 0, group);
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updateModifiers();
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forwardModifiers();
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}
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void Xkb::updateKey(uint32_t key, InputRedirection::KeyboardKeyState state)
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{
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if (!m_keymap || !m_state) {
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return;
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}
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xkb_state_update_key(m_state, key + 8, static_cast<xkb_key_direction>(state));
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if (state == InputRedirection::KeyboardKeyPressed) {
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const auto sym = toKeysym(key);
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if (m_compose.state && xkb_compose_state_feed(m_compose.state, sym) == XKB_COMPOSE_FEED_ACCEPTED) {
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switch (xkb_compose_state_get_status(m_compose.state)) {
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case XKB_COMPOSE_NOTHING:
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m_keysym = sym;
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break;
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case XKB_COMPOSE_COMPOSED:
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m_keysym = xkb_compose_state_get_one_sym(m_compose.state);
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break;
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default:
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m_keysym = XKB_KEY_NoSymbol;
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break;
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}
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} else {
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m_keysym = sym;
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}
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}
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updateModifiers();
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updateConsumedModifiers(key);
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}
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void Xkb::updateModifiers()
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{
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Qt::KeyboardModifiers mods = Qt::NoModifier;
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if (xkb_state_mod_index_is_active(m_state, m_shiftModifier, XKB_STATE_MODS_EFFECTIVE) == 1 ||
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xkb_state_mod_index_is_active(m_state, m_capsModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::ShiftModifier;
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}
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if (xkb_state_mod_index_is_active(m_state, m_altModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::AltModifier;
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}
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if (xkb_state_mod_index_is_active(m_state, m_controlModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::ControlModifier;
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}
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if (xkb_state_mod_index_is_active(m_state, m_metaModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::MetaModifier;
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}
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if (isKeypadKey(m_keysym)) {
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mods |= Qt::KeypadModifier;
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}
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m_modifiers = mods;
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// update LEDs
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LEDs leds;
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if (xkb_state_led_index_is_active(m_state, m_numLock) == 1) {
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leds = leds | LED::NumLock;
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}
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if (xkb_state_led_index_is_active(m_state, m_capsLock) == 1) {
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leds = leds | LED::CapsLock;
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}
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if (xkb_state_led_index_is_active(m_state, m_scrollLock) == 1) {
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leds = leds | LED::ScrollLock;
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}
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if (m_leds != leds) {
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m_leds = leds;
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emit ledsChanged(m_leds);
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}
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m_currentLayout = xkb_state_serialize_layout(m_state, XKB_STATE_LAYOUT_EFFECTIVE);
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m_modifierState.depressed = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_DEPRESSED));
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m_modifierState.latched = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LATCHED));
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m_modifierState.locked = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LOCKED));
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}
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void Xkb::forwardModifiers()
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{
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if (!m_seat || !m_seat->keyboard()) {
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return;
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}
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m_seat->keyboard()->updateModifiers(m_modifierState.depressed,
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m_modifierState.latched,
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m_modifierState.locked,
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m_currentLayout);
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}
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QString Xkb::layoutName() const
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{
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return layoutName(m_currentLayout);
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}
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QString Xkb::layoutName(xkb_layout_index_t layout) const
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{
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if (!m_keymap) {
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return QString{};
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}
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return QString::fromLocal8Bit(xkb_keymap_layout_get_name(m_keymap, layout));
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}
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QMap<xkb_layout_index_t, QString> Xkb::layoutNames() const
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{
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QMap<xkb_layout_index_t, QString> layouts;
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const auto size = m_keymap ? xkb_keymap_num_layouts(m_keymap) : 0u;
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for (xkb_layout_index_t i = 0; i < size; i++) {
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layouts.insert(i, layoutName(i));
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}
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return layouts;
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}
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void Xkb::updateConsumedModifiers(uint32_t key)
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{
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Qt::KeyboardModifiers mods = Qt::NoModifier;
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if (xkb_state_mod_index_is_consumed2(m_state, key + 8, m_shiftModifier, XKB_CONSUMED_MODE_GTK) == 1) {
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mods |= Qt::ShiftModifier;
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}
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if (xkb_state_mod_index_is_consumed2(m_state, key + 8, m_altModifier, XKB_CONSUMED_MODE_GTK) == 1) {
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mods |= Qt::AltModifier;
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}
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if (xkb_state_mod_index_is_consumed2(m_state, key + 8, m_controlModifier, XKB_CONSUMED_MODE_GTK) == 1) {
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mods |= Qt::ControlModifier;
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}
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if (xkb_state_mod_index_is_consumed2(m_state, key + 8, m_metaModifier, XKB_CONSUMED_MODE_GTK) == 1) {
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mods |= Qt::MetaModifier;
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}
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m_consumedModifiers = mods;
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}
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Qt::KeyboardModifiers Xkb::modifiersRelevantForGlobalShortcuts() const
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{
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if (!m_state) {
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return Qt::NoModifier;
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}
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Qt::KeyboardModifiers mods = Qt::NoModifier;
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if (xkb_state_mod_index_is_active(m_state, m_shiftModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::ShiftModifier;
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}
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if (xkb_state_mod_index_is_active(m_state, m_altModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::AltModifier;
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}
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if (xkb_state_mod_index_is_active(m_state, m_controlModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
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mods |= Qt::ControlModifier;
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}
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if (xkb_state_mod_index_is_active(m_state, m_metaModifier, XKB_STATE_MODS_EFFECTIVE) == 1) {
|
|
mods |= Qt::MetaModifier;
|
|
}
|
|
|
|
Qt::KeyboardModifiers consumedMods = m_consumedModifiers;
|
|
if ((mods & Qt::ShiftModifier) && (consumedMods == Qt::ShiftModifier)) {
|
|
// test whether current keysym is a letter
|
|
// in that case the shift should be removed from the consumed modifiers again
|
|
// otherwise it would not be possible to trigger e.g. Shift+W as a shortcut
|
|
// see BUG: 370341
|
|
if (QChar(toQtKey(m_keysym)).isLetter()) {
|
|
consumedMods = Qt::KeyboardModifiers();
|
|
}
|
|
}
|
|
|
|
return mods & ~consumedMods;
|
|
}
|
|
|
|
xkb_keysym_t Xkb::toKeysym(uint32_t key)
|
|
{
|
|
if (!m_state) {
|
|
return XKB_KEY_NoSymbol;
|
|
}
|
|
return xkb_state_key_get_one_sym(m_state, key + 8);
|
|
}
|
|
|
|
QString Xkb::toString(xkb_keysym_t keysym)
|
|
{
|
|
if (!m_state || keysym == XKB_KEY_NoSymbol) {
|
|
return QString();
|
|
}
|
|
QByteArray byteArray(7, 0);
|
|
int ok = xkb_keysym_to_utf8(keysym, byteArray.data(), byteArray.size());
|
|
if (ok == -1 || ok == 0) {
|
|
return QString();
|
|
}
|
|
return QString::fromUtf8(byteArray.constData());
|
|
}
|
|
|
|
Qt::Key Xkb::toQtKey(xkb_keysym_t keysym) const
|
|
{
|
|
return xkbToQtKey(keysym);
|
|
}
|
|
|
|
xkb_keysym_t Xkb::fromQtKey(Qt::Key key, Qt::KeyboardModifiers mods) const
|
|
{
|
|
return qtKeyToXkb(key, mods);
|
|
}
|
|
|
|
xkb_keysym_t Xkb::fromKeyEvent(QKeyEvent *event) const
|
|
{
|
|
xkb_keysym_t sym = xkb_keysym_from_name(event->text().toUtf8().constData(), XKB_KEYSYM_NO_FLAGS);
|
|
if (sym == XKB_KEY_NoSymbol) {
|
|
// mapping from text failed, try mapping through KKeyServer
|
|
sym = fromQtKey(Qt::Key(event->key() & ~Qt::KeyboardModifierMask), event->modifiers());
|
|
}
|
|
return sym;
|
|
}
|
|
|
|
bool Xkb::shouldKeyRepeat(quint32 key) const
|
|
{
|
|
if (!m_keymap) {
|
|
return false;
|
|
}
|
|
return xkb_keymap_key_repeats(m_keymap, key + 8) != 0;
|
|
}
|
|
|
|
void Xkb::switchToNextLayout()
|
|
{
|
|
if (!m_keymap || !m_state) {
|
|
return;
|
|
}
|
|
const xkb_layout_index_t numLayouts = xkb_keymap_num_layouts(m_keymap);
|
|
const xkb_layout_index_t nextLayout = (xkb_state_serialize_layout(m_state, XKB_STATE_LAYOUT_EFFECTIVE) + 1) % numLayouts;
|
|
switchToLayout(nextLayout);
|
|
}
|
|
|
|
void Xkb::switchToPreviousLayout()
|
|
{
|
|
if (!m_keymap || !m_state) {
|
|
return;
|
|
}
|
|
const xkb_layout_index_t previousLayout = m_currentLayout == 0 ? numberOfLayouts() - 1 : m_currentLayout -1;
|
|
switchToLayout(previousLayout);
|
|
}
|
|
|
|
void Xkb::switchToLayout(xkb_layout_index_t layout)
|
|
{
|
|
if (!m_keymap || !m_state) {
|
|
return;
|
|
}
|
|
if (layout >= numberOfLayouts()) {
|
|
return;
|
|
}
|
|
const xkb_mod_mask_t depressed = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_DEPRESSED));
|
|
const xkb_mod_mask_t latched = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LATCHED));
|
|
const xkb_mod_mask_t locked = xkb_state_serialize_mods(m_state, xkb_state_component(XKB_STATE_MODS_LOCKED));
|
|
xkb_state_update_mask(m_state, depressed, latched, locked, 0, 0, layout);
|
|
updateModifiers();
|
|
forwardModifiers();
|
|
}
|
|
|
|
quint32 Xkb::numberOfLayouts() const
|
|
{
|
|
if (!m_keymap) {
|
|
return 0;
|
|
}
|
|
return xkb_keymap_num_layouts(m_keymap);
|
|
}
|
|
|
|
void Xkb::setSeat(KWaylandServer::SeatInterface *seat)
|
|
{
|
|
m_seat = QPointer<KWaylandServer::SeatInterface>(seat);
|
|
}
|
|
|
|
}
|