diff options
Diffstat (limited to 'src/plugins/platforms/wasm/qwasmkeytranslator.cpp')
| -rw-r--r-- | src/plugins/platforms/wasm/qwasmkeytranslator.cpp | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/src/plugins/platforms/wasm/qwasmkeytranslator.cpp b/src/plugins/platforms/wasm/qwasmkeytranslator.cpp new file mode 100644 index 0000000000..8f5240d2d0 --- /dev/null +++ b/src/plugins/platforms/wasm/qwasmkeytranslator.cpp @@ -0,0 +1,295 @@ +// Copyright (C) 2023 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only + +#include "qwasmkeytranslator.h" +#include "qwasmevent.h" + +#include <QtCore/private/qmakearray_p.h> +#include <QtCore/qglobal.h> +#include <QtCore/qobject.h> + +#include <algorithm> + +QT_BEGIN_NAMESPACE + +namespace { +struct WebKb2QtData +{ + static constexpr char StringTerminator = '\0'; + + const char *web; + unsigned int qt; + + constexpr bool operator<=(const WebKb2QtData &that) const noexcept + { + return !(strcmp(that) > 0); + } + + bool operator<(const WebKb2QtData &that) const noexcept { return ::strcmp(web, that.web) < 0; } + + constexpr bool operator==(const WebKb2QtData &that) const noexcept { return strcmp(that) == 0; } + + constexpr int strcmp(const WebKb2QtData &that, const int i = 0) const + { + return web[i] == StringTerminator && that.web[i] == StringTerminator ? 0 + : web[i] == StringTerminator ? -1 + : that.web[i] == StringTerminator ? 1 + : web[i] < that.web[i] ? -1 + : web[i] > that.web[i] ? 1 + : strcmp(that, i + 1); + } +}; + +template<unsigned int Qt, char... WebChar> +struct Web2Qt +{ + static constexpr const char storage[sizeof...(WebChar) + 1] = { WebChar..., '\0' }; + using Type = WebKb2QtData; + static constexpr Type data() noexcept { return Type{ storage, Qt }; } +}; + +template<unsigned int Qt, char... WebChar> +constexpr char Web2Qt<Qt, WebChar...>::storage[]; + +static constexpr const auto WebToQtKeyCodeMappings = qMakeArray( + QSortedData<Web2Qt<Qt::Key_Alt, 'A', 'l', 't', 'L', 'e', 'f', 't'>, + Web2Qt<Qt::Key_Alt, 'A', 'l', 't'>, + Web2Qt<Qt::Key_AltGr, 'A', 'l', 't', 'R', 'i', 'g', 'h', 't'>, + Web2Qt<Qt::Key_Apostrophe, 'Q', 'u', 'o', 't', 'e'>, + Web2Qt<Qt::Key_Backspace, 'B', 'a', 'c', 'k', 's', 'p', 'a', 'c', 'e'>, + Web2Qt<Qt::Key_CapsLock, 'C', 'a', 'p', 's', 'L', 'o', 'c', 'k'>, + Web2Qt<Qt::Key_Control, 'C', 'o', 'n', 't', 'r', 'o', 'l'>, + Web2Qt<Qt::Key_Delete, 'D', 'e', 'l', 'e', 't', 'e'>, + Web2Qt<Qt::Key_Down, 'A', 'r', 'r', 'o', 'w', 'D', 'o', 'w', 'n'>, + Web2Qt<Qt::Key_Escape, 'E', 's', 'c', 'a', 'p', 'e'>, + Web2Qt<Qt::Key_F1, 'F', '1'>, Web2Qt<Qt::Key_F2, 'F', '2'>, + Web2Qt<Qt::Key_F11, 'F', '1', '1'>, Web2Qt<Qt::Key_F12, 'F', '1', '2'>, + Web2Qt<Qt::Key_F13, 'F', '1', '3'>, Web2Qt<Qt::Key_F14, 'F', '1', '4'>, + Web2Qt<Qt::Key_F15, 'F', '1', '5'>, Web2Qt<Qt::Key_F16, 'F', '1', '6'>, + Web2Qt<Qt::Key_F17, 'F', '1', '7'>, Web2Qt<Qt::Key_F18, 'F', '1', '8'>, + Web2Qt<Qt::Key_F19, 'F', '1', '9'>, Web2Qt<Qt::Key_F20, 'F', '2', '0'>, + Web2Qt<Qt::Key_F21, 'F', '2', '1'>, Web2Qt<Qt::Key_F22, 'F', '2', '2'>, + Web2Qt<Qt::Key_F23, 'F', '2', '3'>, + Web2Qt<Qt::Key_F3, 'F', '3'>, Web2Qt<Qt::Key_F4, 'F', '4'>, + Web2Qt<Qt::Key_F5, 'F', '5'>, Web2Qt<Qt::Key_F6, 'F', '6'>, + Web2Qt<Qt::Key_F7, 'F', '7'>, Web2Qt<Qt::Key_F8, 'F', '8'>, + Web2Qt<Qt::Key_F9, 'F', '9'>, Web2Qt<Qt::Key_F10, 'F', '1', '0'>, + Web2Qt<Qt::Key_Help, 'H', 'e', 'l', 'p'>, + Web2Qt<Qt::Key_Home, 'H', 'o', 'm', 'e'>, Web2Qt<Qt::Key_End, 'E', 'n', 'd'>, + Web2Qt<Qt::Key_Insert, 'I', 'n', 's', 'e', 'r', 't'>, + Web2Qt<Qt::Key_Left, 'A', 'r', 'r', 'o', 'w', 'L', 'e', 'f', 't'>, + Web2Qt<Qt::Key_Meta, 'M', 'e', 't', 'a'>, Web2Qt<Qt::Key_Meta, 'O', 'S'>, + Web2Qt<Qt::Key_Menu, 'C', 'o', 'n', 't', 'e', 'x', 't', 'M', 'e', 'n', 'u'>, + Web2Qt<Qt::Key_NumLock, 'N', 'u', 'm', 'L', 'o', 'c', 'k'>, + Web2Qt<Qt::Key_PageDown, 'P', 'a', 'g', 'e', 'D', 'o', 'w', 'n'>, + Web2Qt<Qt::Key_PageUp, 'P', 'a', 'g', 'e', 'U', 'p'>, + Web2Qt<Qt::Key_Paste, 'P', 'a', 's', 't', 'e'>, + Web2Qt<Qt::Key_Pause, 'C', 'l', 'e', 'a', 'r'>, + Web2Qt<Qt::Key_Pause, 'P', 'a', 'u', 's', 'e'>, + Web2Qt<Qt::Key_QuoteLeft, 'B', 'a', 'c', 'k', 'q', 'u', 'o', 't', 'e'>, + Web2Qt<Qt::Key_QuoteLeft, 'I', 'n', 't', 'l', 'B', 'a', 'c', 'k', 's', 'l', 'a', 's', 'h'>, + Web2Qt<Qt::Key_Return, 'E', 'n', 't', 'e', 'r'>, + Web2Qt<Qt::Key_Right, 'A', 'r', 'r', 'o', 'w', 'R', 'i', 'g', 'h', 't'>, + Web2Qt<Qt::Key_ScrollLock, 'S', 'c', 'r', 'o', 'l', 'l', 'L', 'o', 'c', 'k'>, + Web2Qt<Qt::Key_Shift, 'S', 'h', 'i', 'f', 't'>, + Web2Qt<Qt::Key_Tab, 'T', 'a', 'b'>, + Web2Qt<Qt::Key_Up, 'A', 'r', 'r', 'o', 'w', 'U', 'p'>, + Web2Qt<Qt::Key_yen, 'I', 'n', 't', 'l', 'Y', 'e', 'n'>>::Data{}); + +static constexpr const auto DiacriticalCharsKeyToTextLowercase = qMakeArray( + QSortedData< + Web2Qt<Qt::Key_Aacute, '\xc3', '\xa1'>, + Web2Qt<Qt::Key_Acircumflex, '\xc3', '\xa2'>, + Web2Qt<Qt::Key_Adiaeresis, '\xc3', '\xa4'>, + Web2Qt<Qt::Key_AE, '\xc3', '\xa6'>, + Web2Qt<Qt::Key_Agrave, '\xc3', '\xa0'>, + Web2Qt<Qt::Key_Aring, '\xc3', '\xa5'>, + Web2Qt<Qt::Key_Atilde, '\xc3', '\xa3'>, + Web2Qt<Qt::Key_Ccedilla, '\xc3', '\xa7'>, + Web2Qt<Qt::Key_Eacute, '\xc3', '\xa9'>, + Web2Qt<Qt::Key_Ecircumflex, '\xc3', '\xaa'>, + Web2Qt<Qt::Key_Ediaeresis, '\xc3', '\xab'>, + Web2Qt<Qt::Key_Egrave, '\xc3', '\xa8'>, + Web2Qt<Qt::Key_Iacute, '\xc3', '\xad'>, + Web2Qt<Qt::Key_Icircumflex, '\xc3', '\xae'>, + Web2Qt<Qt::Key_Idiaeresis, '\xc3', '\xaf'>, + Web2Qt<Qt::Key_Igrave, '\xc3', '\xac'>, + Web2Qt<Qt::Key_Ntilde, '\xc3', '\xb1'>, + Web2Qt<Qt::Key_Oacute, '\xc3', '\xb3'>, + Web2Qt<Qt::Key_Ocircumflex, '\xc3', '\xb4'>, + Web2Qt<Qt::Key_Odiaeresis, '\xc3', '\xb6'>, + Web2Qt<Qt::Key_Ograve, '\xc3', '\xb2'>, + Web2Qt<Qt::Key_Ooblique, '\xc3', '\xb8'>, + Web2Qt<Qt::Key_Otilde, '\xc3', '\xb5'>, + Web2Qt<Qt::Key_Uacute, '\xc3', '\xba'>, + Web2Qt<Qt::Key_Ucircumflex, '\xc3', '\xbb'>, + Web2Qt<Qt::Key_Udiaeresis, '\xc3', '\xbc'>, + Web2Qt<Qt::Key_Ugrave, '\xc3', '\xb9'>, + Web2Qt<Qt::Key_Yacute, '\xc3', '\xbd'>, + Web2Qt<Qt::Key_ydiaeresis, '\xc3', '\xbf'>>::Data{}); + +static constexpr const auto DiacriticalCharsKeyToTextUppercase = qMakeArray( + QSortedData< + Web2Qt<Qt::Key_Aacute, '\xc3', '\x81'>, + Web2Qt<Qt::Key_Acircumflex, '\xc3', '\x82'>, + Web2Qt<Qt::Key_Adiaeresis, '\xc3', '\x84'>, + Web2Qt<Qt::Key_AE, '\xc3', '\x86'>, + Web2Qt<Qt::Key_Agrave, '\xc3', '\x80'>, + Web2Qt<Qt::Key_Aring, '\xc3', '\x85'>, + Web2Qt<Qt::Key_Atilde, '\xc3', '\x83'>, + Web2Qt<Qt::Key_Ccedilla, '\xc3', '\x87'>, + Web2Qt<Qt::Key_Eacute, '\xc3', '\x89'>, + Web2Qt<Qt::Key_Ecircumflex, '\xc3', '\x8a'>, + Web2Qt<Qt::Key_Ediaeresis, '\xc3', '\x8b'>, + Web2Qt<Qt::Key_Egrave, '\xc3', '\x88'>, + Web2Qt<Qt::Key_Iacute, '\xc3', '\x8d'>, + Web2Qt<Qt::Key_Icircumflex, '\xc3', '\x8e'>, + Web2Qt<Qt::Key_Idiaeresis, '\xc3', '\x8f'>, + Web2Qt<Qt::Key_Igrave, '\xc3', '\x8c'>, + Web2Qt<Qt::Key_Ntilde, '\xc3', '\x91'>, + Web2Qt<Qt::Key_Oacute, '\xc3', '\x93'>, + Web2Qt<Qt::Key_Ocircumflex, '\xc3', '\x94'>, + Web2Qt<Qt::Key_Odiaeresis, '\xc3', '\x96'>, + Web2Qt<Qt::Key_Ograve, '\xc3', '\x92'>, + Web2Qt<Qt::Key_Ooblique, '\xc3', '\x98'>, + Web2Qt<Qt::Key_Otilde, '\xc3', '\x95'>, + Web2Qt<Qt::Key_Uacute, '\xc3', '\x9a'>, + Web2Qt<Qt::Key_Ucircumflex, '\xc3', '\x9b'>, + Web2Qt<Qt::Key_Udiaeresis, '\xc3', '\x9c'>, + Web2Qt<Qt::Key_Ugrave, '\xc3', '\x99'>, + Web2Qt<Qt::Key_Yacute, '\xc3', '\x9d'>, + Web2Qt<Qt::Key_ydiaeresis, '\xc5', '\xb8'>>::Data{}); + +static_assert(DiacriticalCharsKeyToTextLowercase.size() + == DiacriticalCharsKeyToTextUppercase.size(), + "Add the new key to both arrays"); + +struct KeyMapping +{ + Qt::Key from, to; +}; + +constexpr KeyMapping tildeKeyTable[] = { + // ~ + { Qt::Key_A, Qt::Key_Atilde }, + { Qt::Key_N, Qt::Key_Ntilde }, + { Qt::Key_O, Qt::Key_Otilde }, +}; +constexpr KeyMapping graveKeyTable[] = { + // ` + { Qt::Key_A, Qt::Key_Agrave }, { Qt::Key_E, Qt::Key_Egrave }, { Qt::Key_I, Qt::Key_Igrave }, + { Qt::Key_O, Qt::Key_Ograve }, { Qt::Key_U, Qt::Key_Ugrave }, +}; +constexpr KeyMapping acuteKeyTable[] = { + // ' + { Qt::Key_A, Qt::Key_Aacute }, { Qt::Key_E, Qt::Key_Eacute }, { Qt::Key_I, Qt::Key_Iacute }, + { Qt::Key_O, Qt::Key_Oacute }, { Qt::Key_U, Qt::Key_Uacute }, { Qt::Key_Y, Qt::Key_Yacute }, +}; +constexpr KeyMapping diaeresisKeyTable[] = { + // umlaut ยจ + { Qt::Key_A, Qt::Key_Adiaeresis }, { Qt::Key_E, Qt::Key_Ediaeresis }, + { Qt::Key_I, Qt::Key_Idiaeresis }, { Qt::Key_O, Qt::Key_Odiaeresis }, + { Qt::Key_U, Qt::Key_Udiaeresis }, { Qt::Key_Y, Qt::Key_ydiaeresis }, +}; +constexpr KeyMapping circumflexKeyTable[] = { + // ^ + { Qt::Key_A, Qt::Key_Acircumflex }, { Qt::Key_E, Qt::Key_Ecircumflex }, + { Qt::Key_I, Qt::Key_Icircumflex }, { Qt::Key_O, Qt::Key_Ocircumflex }, + { Qt::Key_U, Qt::Key_Ucircumflex }, +}; + +static Qt::Key find_impl(const KeyMapping *first, const KeyMapping *last, Qt::Key key) noexcept +{ + while (first != last) { + if (first->from == key) + return first->to; + ++first; + } + return Qt::Key_unknown; +} + +template<size_t N> +static Qt::Key find(const KeyMapping (&map)[N], Qt::Key key) noexcept +{ + return find_impl(map, map + N, key); +} + +Qt::Key translateBaseKeyUsingDeadKey(Qt::Key accentBaseKey, Qt::Key deadKey) +{ + switch (deadKey) { + case Qt::Key_Dead_Grave: + return find(graveKeyTable, accentBaseKey); + case Qt::Key_Dead_Acute: + return find(acuteKeyTable, accentBaseKey); + case Qt::Key_Dead_Tilde: + return find(tildeKeyTable, accentBaseKey); + case Qt::Key_Dead_Diaeresis: + return find(diaeresisKeyTable, accentBaseKey); + case Qt::Key_Dead_Circumflex: + return find(circumflexKeyTable, accentBaseKey); + default: + return Qt::Key_unknown; + }; +} + +template<class T> +std::optional<QString> findKeyTextByKeyId(const T &mappingArray, Qt::Key qtKey) +{ + const auto it = std::find_if(mappingArray.cbegin(), mappingArray.cend(), + [qtKey](const WebKb2QtData &data) { return data.qt == qtKey; }); + return it != mappingArray.cend() ? it->web : std::optional<QString>(); +} +} // namespace + +std::optional<Qt::Key> QWasmKeyTranslator::mapWebKeyTextToQtKey(const char *toFind) +{ + const WebKb2QtData searchKey{ toFind, 0 }; + const auto it = std::lower_bound(WebToQtKeyCodeMappings.cbegin(), WebToQtKeyCodeMappings.cend(), + searchKey); + return it != WebToQtKeyCodeMappings.cend() && searchKey == *it ? static_cast<Qt::Key>(it->qt) + : std::optional<Qt::Key>(); +} + +QWasmDeadKeySupport::QWasmDeadKeySupport() = default; + +QWasmDeadKeySupport::~QWasmDeadKeySupport() = default; + +void QWasmDeadKeySupport::applyDeadKeyTranslations(KeyEvent *event) +{ + if (event->deadKey) { + m_activeDeadKey = event->key; + } else if (m_activeDeadKey != Qt::Key_unknown + && (((m_keyModifiedByDeadKeyOnPress == Qt::Key_unknown + && event->type == EventType::KeyDown)) + || (m_keyModifiedByDeadKeyOnPress == event->key + && event->type == EventType::KeyUp))) { + const Qt::Key baseKey = event->key; + const Qt::Key translatedKey = translateBaseKeyUsingDeadKey(baseKey, m_activeDeadKey); + if (translatedKey != Qt::Key_unknown) { + event->key = translatedKey; + + auto foundText = event->modifiers.testFlag(Qt::ShiftModifier) + ? findKeyTextByKeyId(DiacriticalCharsKeyToTextUppercase, event->key) + : findKeyTextByKeyId(DiacriticalCharsKeyToTextLowercase, event->key); + Q_ASSERT(foundText.has_value()); + event->text = foundText->size() == 1 ? *foundText : QString(); + } + + if (!event->text.isEmpty()) { + if (event->type == EventType::KeyDown) { + // Assume the first keypress with an active dead key is treated as modified, + // regardless of whether it has actually been modified or not. Take into account + // only events that produce actual key text. + if (!event->text.isEmpty()) + m_keyModifiedByDeadKeyOnPress = baseKey; + } else { + Q_ASSERT(event->type == EventType::KeyUp); + Q_ASSERT(m_keyModifiedByDeadKeyOnPress == baseKey); + m_keyModifiedByDeadKeyOnPress = Qt::Key_unknown; + m_activeDeadKey = Qt::Key_unknown; + } + } + } +} + +QT_END_NAMESPACE |