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Diffstat (limited to 'src/virtualkeyboard/pinyininputmethod.cpp')
| -rw-r--r-- | src/virtualkeyboard/pinyininputmethod.cpp | 496 |
1 files changed, 0 insertions, 496 deletions
diff --git a/src/virtualkeyboard/pinyininputmethod.cpp b/src/virtualkeyboard/pinyininputmethod.cpp deleted file mode 100644 index 3181b438..00000000 --- a/src/virtualkeyboard/pinyininputmethod.cpp +++ /dev/null @@ -1,496 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:GPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3 or (at your option) any later version -** approved by the KDE Free Qt Foundation. The licenses are as published by -** the Free Software Foundation and appearing in the file LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "pinyininputmethod.h" -#include "pinyindecoderservice.h" -#include "inputcontext.h" -#include "virtualkeyboarddebug.h" - -namespace QtVirtualKeyboard { - -class PinyinInputMethodPrivate : public AbstractInputMethodPrivate -{ - Q_DECLARE_PUBLIC(PinyinInputMethod) - -public: - enum State - { - Idle, - Input, - Predict - }; - - PinyinInputMethodPrivate(PinyinInputMethod *q_ptr) : - q_ptr(q_ptr), - inputMode(InputEngine::Pinyin), - pinyinDecoderService(PinyinDecoderService::getInstance()), - state(Idle), - surface(), - totalChoicesNum(0), - candidatesList(), - fixedLen(0), - composingStr(), - activeCmpsLen(0), - finishSelection(true), - posDelSpl(-1), - isPosInSpl(false) - { - } - - void resetToIdleState() - { - Q_Q(PinyinInputMethod); - - InputContext *inputContext = q->inputContext(); - - // Disable the user dictionary when entering sensitive data - if (inputContext) { - bool userDictionaryEnabled = !inputContext->inputMethodHints().testFlag(Qt::ImhSensitiveData); - if (userDictionaryEnabled != pinyinDecoderService->isUserDictionaryEnabled()) - pinyinDecoderService->setUserDictionary(userDictionaryEnabled); - } - - if (state == Idle) - return; - - state = Idle; - surface.clear(); - fixedLen = 0; - finishSelection = true; - composingStr.clear(); - if (inputContext) - inputContext->setPreeditText(""); - activeCmpsLen = 0; - posDelSpl = -1; - isPosInSpl = false; - - resetCandidates(); - } - - bool addSpellingChar(QChar ch, bool reset) - { - if (reset) { - surface.clear(); - pinyinDecoderService->resetSearch(); - } - if (ch == Qt::Key_Apostrophe) { - if (surface.isEmpty()) - return false; - if (surface.endsWith(ch)) - return true; - } - surface.append(ch); - return true; - } - - bool removeSpellingChar() - { - if (surface.isEmpty()) - return false; - QVector<int> splStart = pinyinDecoderService->spellingStartPositions(); - isPosInSpl = (surface.length() <= splStart[fixedLen + 1]); - posDelSpl = isPosInSpl ? fixedLen - 1 : surface.length() - 1; - return true; - } - - void chooseAndUpdate(int candId) - { - Q_Q(PinyinInputMethod); - - if (state == Predict) - choosePredictChoice(candId); - else - chooseDecodingCandidate(candId); - - if (composingStr.length() > 0) { - if ((candId >= 0 || finishSelection) && composingStr.length() == fixedLen) { - QString resultStr = getComposingStrActivePart(); - tryPredict(); - q->inputContext()->commit(resultStr); - } else if (state == Idle) { - state = Input; - } - } else { - tryPredict(); - } - } - - bool chooseAndFinish() - { - if (state == Predict || !totalChoicesNum) - return false; - - chooseAndUpdate(0); - if (state != Predict && totalChoicesNum > 0) - chooseAndUpdate(0); - - return true; - } - - int candidatesCount() - { - return totalChoicesNum; - } - - QString candidateAt(int index) - { - if (index < 0 || index >= totalChoicesNum) - return QString(); - if (index >= candidatesList.size()) { - int fetchMore = qMin(index + 20, totalChoicesNum - candidatesList.size()); - candidatesList.append(pinyinDecoderService->fetchCandidates(candidatesList.size(), fetchMore, fixedLen)); - if (index == 0 && totalChoicesNum == 1) { - int surfaceDecodedLen = pinyinDecoderService->pinyinStringLength(true); - if (surfaceDecodedLen < surface.length()) - candidatesList[0] = candidatesList[0] + surface.mid(surfaceDecodedLen).toLower(); - } - } - return index < candidatesList.size() ? candidatesList[index] : QString(); - } - - void chooseDecodingCandidate(int candId) - { - Q_Q(PinyinInputMethod); - Q_ASSERT(state != Predict); - - int result = 0; - if (candId < 0) { - if (surface.length() > 0) { - if (posDelSpl < 0) { - result = pinyinDecoderService->search(surface); - } else { - result = pinyinDecoderService->deleteSearch(posDelSpl, isPosInSpl, false); - posDelSpl = -1; - } - } - } else { - if (totalChoicesNum > 1) { - result = pinyinDecoderService->chooceCandidate(candId); - } else { - QString resultStr; - if (totalChoicesNum == 1) { - QString undecodedStr = candId < candidatesList.length() ? candidatesList.at(candId) : QString(); - resultStr = pinyinDecoderService->candidateAt(0).mid(0, fixedLen) + undecodedStr; - } - resetToIdleState(); - if (!resultStr.isEmpty()) - q->inputContext()->commit(resultStr); - return; - } - } - - resetCandidates(); - totalChoicesNum = result; - - surface = pinyinDecoderService->pinyinString(false); - QVector<int> splStart = pinyinDecoderService->spellingStartPositions(); - QString fullSent = pinyinDecoderService->candidateAt(0); - fixedLen = pinyinDecoderService->fixedLength(); - composingStr = fullSent.mid(0, fixedLen) + surface.mid(splStart[fixedLen + 1]); - activeCmpsLen = composingStr.length(); - - // Prepare the display string. - QString composingStrDisplay; - int surfaceDecodedLen = pinyinDecoderService->pinyinStringLength(true); - if (!surfaceDecodedLen) { - composingStrDisplay = composingStr.toLower(); - if (!totalChoicesNum) - totalChoicesNum = 1; - } else { - activeCmpsLen = activeCmpsLen - (surface.length() - surfaceDecodedLen); - composingStrDisplay = fullSent.mid(0, fixedLen); - for (int pos = fixedLen + 1; pos < splStart.size() - 1; pos++) { - composingStrDisplay += surface.mid(splStart[pos], splStart[pos + 1] - splStart[pos]).toUpper(); - if (splStart[pos + 1] < surfaceDecodedLen) - composingStrDisplay += " "; - } - if (surfaceDecodedLen < surface.length()) - composingStrDisplay += surface.mid(surfaceDecodedLen).toLower(); - } - q->inputContext()->setPreeditText(composingStrDisplay); - - finishSelection = splStart.size() == (fixedLen + 2); - if (!finishSelection) - candidateAt(0); - } - - void choosePredictChoice(int choiceId) - { - Q_ASSERT(state == Predict); - - if (choiceId < 0 || choiceId >= totalChoicesNum) - return; - - QString tmp = candidatesList.at(choiceId); - - resetCandidates(); - - candidatesList.append(tmp); - totalChoicesNum = 1; - - surface.clear(); - fixedLen = tmp.length(); - composingStr = tmp; - activeCmpsLen = fixedLen; - - finishSelection = true; - } - - QString getComposingStrActivePart() - { - return composingStr.mid(0, activeCmpsLen); - } - - void resetCandidates() - { - candidatesList.clear(); - if (totalChoicesNum) { - totalChoicesNum = 0; - } - } - - void updateCandidateList() - { - Q_Q(PinyinInputMethod); - emit q->selectionListChanged(SelectionListModel::WordCandidateList); - emit q->selectionListActiveItemChanged(SelectionListModel::WordCandidateList, - totalChoicesNum > 0 && state == PinyinInputMethodPrivate::Input ? 0 : -1); - } - - bool canDoPrediction() - { - Q_Q(PinyinInputMethod); - InputContext *inputContext = q->inputContext(); - return inputMode == InputEngine::Pinyin && - composingStr.length() == fixedLen && - inputContext && - !inputContext->inputMethodHints().testFlag(Qt::ImhNoPredictiveText); - } - - void tryPredict() - { - // Try to get the prediction list. - if (canDoPrediction()) { - Q_Q(PinyinInputMethod); - if (state != Predict) - resetToIdleState(); - InputContext *inputContext = q->inputContext(); - int cursorPosition = inputContext->cursorPosition(); - int historyStart = qMax(0, cursorPosition - 3); - QString history = inputContext->surroundingText().mid(historyStart, cursorPosition - historyStart); - candidatesList = pinyinDecoderService->predictionList(history); - totalChoicesNum = candidatesList.size(); - finishSelection = false; - state = Predict; - } else { - resetCandidates(); - } - - if (!candidatesCount()) - resetToIdleState(); - } - - PinyinInputMethod *q_ptr; - InputEngine::InputMode inputMode; - QPointer<PinyinDecoderService> pinyinDecoderService; - State state; - QString surface; - int totalChoicesNum; - QList<QString> candidatesList; - int fixedLen; - QString composingStr; - int activeCmpsLen; - bool finishSelection; - int posDelSpl; - bool isPosInSpl; -}; - -class ScopedCandidateListUpdate -{ - Q_DISABLE_COPY(ScopedCandidateListUpdate) -public: - inline explicit ScopedCandidateListUpdate(PinyinInputMethodPrivate *d) : - d(d), - candidatesList(d->candidatesList), - totalChoicesNum(d->totalChoicesNum), - state(d->state) - { - } - - inline ~ScopedCandidateListUpdate() - { - if (totalChoicesNum != d->totalChoicesNum || state != d->state || candidatesList != d->candidatesList) - d->updateCandidateList(); - } - -private: - PinyinInputMethodPrivate *d; - QList<QString> candidatesList; - int totalChoicesNum; - PinyinInputMethodPrivate::State state; -}; - -/*! - \class QtVirtualKeyboard::PinyinInputMethod - \internal -*/ - -PinyinInputMethod::PinyinInputMethod(QObject *parent) : - AbstractInputMethod(*new PinyinInputMethodPrivate(this), parent) -{ -} - -PinyinInputMethod::~PinyinInputMethod() -{ -} - -QList<InputEngine::InputMode> PinyinInputMethod::inputModes(const QString &locale) -{ - Q_UNUSED(locale) - Q_D(PinyinInputMethod); - QList<InputEngine::InputMode> result; - if (d->pinyinDecoderService) - result << InputEngine::Pinyin; - result << InputEngine::Latin; - return result; -} - -bool PinyinInputMethod::setInputMode(const QString &locale, InputEngine::InputMode inputMode) -{ - Q_UNUSED(locale) - Q_D(PinyinInputMethod); - reset(); - if (inputMode == InputEngine::Pinyin && !d->pinyinDecoderService) - return false; - d->inputMode = inputMode; - return true; -} - -bool PinyinInputMethod::setTextCase(InputEngine::TextCase textCase) -{ - Q_UNUSED(textCase) - return true; -} - -bool PinyinInputMethod::keyEvent(Qt::Key key, const QString &text, Qt::KeyboardModifiers modifiers) -{ - Q_UNUSED(modifiers) - Q_D(PinyinInputMethod); - if (d->inputMode == InputEngine::Pinyin) { - ScopedCandidateListUpdate scopedCandidateListUpdate(d); - Q_UNUSED(scopedCandidateListUpdate) - if ((key >= Qt::Key_A && key <= Qt::Key_Z) || (key == Qt::Key_Apostrophe)) { - if (d->state == PinyinInputMethodPrivate::Predict) - d->resetToIdleState(); - if (d->addSpellingChar(text.at(0), d->state == PinyinInputMethodPrivate::Idle)) { - d->chooseAndUpdate(-1); - return true; - } - } else if (key == Qt::Key_Space) { - if (d->state != PinyinInputMethodPrivate::Predict && d->candidatesCount() > 0) { - d->chooseAndUpdate(0); - return true; - } - } else if (key == Qt::Key_Return) { - if (d->state != PinyinInputMethodPrivate::Predict && d->candidatesCount() > 0) { - QString surface = d->surface; - d->resetToIdleState(); - inputContext()->commit(surface); - return true; - } - } else if (key == Qt::Key_Backspace) { - if (d->removeSpellingChar()) { - d->chooseAndUpdate(-1); - return true; - } - } else if (!text.isEmpty()) { - d->chooseAndFinish(); - } - } - return false; -} - -QList<SelectionListModel::Type> PinyinInputMethod::selectionLists() -{ - return QList<SelectionListModel::Type>() << SelectionListModel::WordCandidateList; -} - -int PinyinInputMethod::selectionListItemCount(SelectionListModel::Type type) -{ - Q_UNUSED(type) - Q_D(PinyinInputMethod); - return d->candidatesCount(); -} - -QVariant PinyinInputMethod::selectionListData(SelectionListModel::Type type, int index, int role) -{ - QVariant result; - Q_UNUSED(type) - Q_D(PinyinInputMethod); - switch (role) { - case SelectionListModel::DisplayRole: - result = QVariant(d->candidateAt(index)); - break; - case SelectionListModel::WordCompletionLengthRole: - result.setValue(0); - break; - default: - result = AbstractInputMethod::selectionListData(type, index, role); - break; - } - return result; -} - -void PinyinInputMethod::selectionListItemSelected(SelectionListModel::Type type, int index) -{ - Q_UNUSED(type) - Q_D(PinyinInputMethod); - ScopedCandidateListUpdate scopedCandidateListUpdate(d); - Q_UNUSED(scopedCandidateListUpdate) - d->chooseAndUpdate(index); -} - -void PinyinInputMethod::reset() -{ - Q_D(PinyinInputMethod); - ScopedCandidateListUpdate scopedCandidateListUpdate(d); - Q_UNUSED(scopedCandidateListUpdate) - d->resetToIdleState(); -} - -void PinyinInputMethod::update() -{ - Q_D(PinyinInputMethod); - ScopedCandidateListUpdate scopedCandidateListUpdate(d); - Q_UNUSED(scopedCandidateListUpdate) - d->chooseAndFinish(); - d->tryPredict(); -} - -} // namespace QtVirtualKeyboard |