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#ifndef QT_NO_IM

#include "qcoefepinputcontext_p.h"

#include <qapplication.h>

#include <qtextformat.h>

#include <private/qcore_symbian_p.h>

#include <fepitfr.h>

#include <hal.h>

#include <limits.h>

// You only find these enumerations on SDK 5 onwards, so we need to provide our own

// to remain compatible with older releases. They won't be called by pre-5.0 SDKs.

// MAknEdStateObserver::EAknCursorPositionChanged

#define QT_EAknCursorPositionChanged MAknEdStateObserver::EAknEdwinStateEvent(6)

// MAknEdStateObserver::EAknActivatePenInputRequest

#define QT_EAknActivatePenInputRequest MAknEdStateObserver::EAknEdwinStateEvent(7)

QT_BEGIN_NAMESPACE

QCoeFepInputContext::QCoeFepInputContext(QObject *parent)

    : QInputContext(parent),

      m_fepState(q_check_ptr(new CAknEdwinState)),		// CBase derived object needs check on new

      m_lastImHints(Qt::ImhNone),

      m_textCapabilities(TCoeInputCapabilities::EAllText),

      m_inDestruction(false),

      m_pendingInputCapabilitiesChanged(false),

      m_cursorVisibility(1),

      m_inlinePosition(0),

      m_formatRetriever(0),

      m_pointerHandler(0),

      m_cursorPos(0),

      m_hasTempPreeditString(false)

{

    m_fepState->SetObjectProvider(this);

    m_fepState->SetFlags(EAknEditorFlagDefault);

    m_fepState->SetDefaultInputMode( EAknEditorTextInputMode );

    m_fepState->SetPermittedInputModes( EAknEditorAllInputModes );

    m_fepState->SetDefaultCase( EAknEditorLowerCase );

    m_fepState->SetPermittedCases( EAknEditorLowerCase|EAknEditorUpperCase );

    m_fepState->SetSpecialCharacterTableResourceId(R_AVKON_SPECIAL_CHARACTER_TABLE_DIALOG);

    m_fepState->SetNumericKeymap( EAknEditorStandardNumberModeKeymap );

}

QCoeFepInputContext::~QCoeFepInputContext()

{

    m_inDestruction = true;

    // This is to make sure that the FEP manager "forgets" about us,

    // otherwise we may get callbacks even after we're destroyed.

    // The call below is essentially equivalent to InputCapabilitiesChanged(),

    // but is synchronous, rather than asynchronous.

    CCoeEnv::Static()->SyncNotifyFocusObserversOfChangeInFocus();

    if (m_fepState)

        delete m_fepState;

}

void QCoeFepInputContext::reset()

{

    commitCurrentString(true);

}

void QCoeFepInputContext::ReportAknEdStateEvent(MAknEdStateObserver::EAknEdwinStateEvent aEventType)

{

    QT_TRAP_THROWING(m_fepState->ReportAknEdStateEventL(aEventType));

}

void QCoeFepInputContext::update()

{

    updateHints(false);

    // For pre-5.0 SDKs, we don't do text updates on S60 side.

    if (QSysInfo::s60Version() < QSysInfo::SV_S60_5_0) {

        return;

    }

    // Don't be fooled (as I was) by the name of this enumeration.

    // What it really does is tell the virtual keyboard UI that the text has been

    // updated and it should be reflected in the internal display of the VK.

    ReportAknEdStateEvent(QT_EAknCursorPositionChanged);

}

void QCoeFepInputContext::setFocusWidget(QWidget *w)

{

    commitCurrentString(true);

    QInputContext::setFocusWidget(w);

    updateHints(true);

}

void QCoeFepInputContext::widgetDestroyed(QWidget *w)

{

    // Make sure that the input capabilities of whatever new widget got focused are queried.

    CCoeControl *ctrl = w->effectiveWinId();

    if (ctrl->IsFocused()) {

        queueInputCapabilitiesChanged();

    }

}

QString QCoeFepInputContext::language()

{

    TLanguage lang = m_fepState->LocalLanguage();

    const QByteArray localeName = qt_symbianLocaleName(lang);

    if (!localeName.isEmpty()) {

        return QString::fromLatin1(localeName);

    } else {

        return QString::fromLatin1("C");

    }

}

bool QCoeFepInputContext::needsInputPanel()

{

    switch (QSysInfo::s60Version()) {

    case QSysInfo::SV_S60_3_1:

    case QSysInfo::SV_S60_3_2:

        // There are no touch phones for pre-5.0 SDKs.

        return false;

#ifdef Q_CC_NOKIAX86

    default:

        // For emulator we assume that we need an input panel, since we can't

        // separate between phone types.

        return true;

#else

    case QSysInfo::SV_S60_5_0: {

        // For SDK == 5.0, we need phone specific detection, since the HAL API

        // is no good on most phones. However, all phones at the time of writing use the

        // input panel, except N97 in landscape mode, but in this mode it refuses to bring

        // up the panel anyway, so we don't have to care.

        return true;

    }

    default:

        // For unknown/newer types, we try to use the HAL API.

        int keyboardEnabled;

        int keyboardType;

        int err[2];

        err[0] = HAL::Get(HAL::EKeyboard, keyboardType);

        err[1] = HAL::Get(HAL::EKeyboardState, keyboardEnabled);

        if (err[0] == KErrNone && err[1] == KErrNone

                && keyboardType != 0 && keyboardEnabled)

            // Means that we have some sort of keyboard.

            return false;

        // Fall back to using the input panel.

        return true;

#endif // !Q_CC_NOKIAX86

    }

}

bool QCoeFepInputContext::filterEvent(const QEvent *event)

{

    // The CloseSoftwareInputPanel event is not handled here, because the VK will automatically

    // close when it discovers that the underlying widget does not have input capabilities.

    if (!focusWidget())

        return false;

    switch (event->type()) {

    case QEvent::KeyPress:

        commitTemporaryPreeditString();

        // fall through intended

    case QEvent::KeyRelease:

        const QKeyEvent *keyEvent = static_cast<const QKeyEvent *>(event);

        switch (keyEvent->key()) {

        case Qt::Key_F20:

            Q_ASSERT(m_lastImHints == focusWidget()->inputMethodHints());

            if (m_lastImHints & Qt::ImhHiddenText) {

                // Special case in Symbian. On editors with secret text, F20 is for some reason

                // considered to be a backspace.

                QKeyEvent modifiedEvent(keyEvent->type(), Qt::Key_Backspace, keyEvent->modifiers(),

                        keyEvent->text(), keyEvent->isAutoRepeat(), keyEvent->count());

                QApplication::sendEvent(focusWidget(), &modifiedEvent);

                return true;

            }

            break;

        case Qt::Key_Select:

            if (!m_preeditString.isEmpty()) {

                commitCurrentString(true);

                return true;

            }

            break;

        default:

            break;

        }

        if (keyEvent->type() == QEvent::KeyPress

            && focusWidget()->inputMethodHints() & Qt::ImhHiddenText

            && !keyEvent->text().isEmpty()) {

            // Send some temporary preedit text in order to make text visible for a moment.

            m_cursorPos = focusWidget()->inputMethodQuery(Qt::ImCursorPosition).toInt();

            m_preeditString = keyEvent->text();

            QList<QInputMethodEvent::Attribute> attributes;

            QInputMethodEvent imEvent(m_preeditString, attributes);

            sendEvent(imEvent);

            m_tempPreeditStringTimeout.start(1000, this);

            m_hasTempPreeditString = true;

            update();

            return true;

        }

        break;

    }

    if (!needsInputPanel())

        return false;

    if (event->type() == QEvent::RequestSoftwareInputPanel) {

        // Notify S60 that we want the virtual keyboard to show up.

        QSymbianControl *sControl;

        sControl = focusWidget()->effectiveWinId()->MopGetObject(sControl);

        Q_ASSERT(sControl);

        // The FEP UI temporarily steals focus when it shows up the first time, causing

        // all sorts of weird effects on the focused widgets. Since it will immediately give

        // back focus to us, we temporarily disable focus handling until the job's done.

        if (sControl) {

            sControl->setIgnoreFocusChanged(true);

        }

        ensureInputCapabilitiesChanged();

        m_fepState->ReportAknEdStateEventL(MAknEdStateObserver::QT_EAknActivatePenInputRequest);

        if (sControl) {

            sControl->setIgnoreFocusChanged(false);

        }

        return true;

    }

    return false;

}

void QCoeFepInputContext::timerEvent(QTimerEvent *timerEvent)

{

    if (timerEvent->timerId() == m_tempPreeditStringTimeout.timerId())

        commitTemporaryPreeditString();

}

void QCoeFepInputContext::commitTemporaryPreeditString()

{

    if (m_tempPreeditStringTimeout.isActive())

        m_tempPreeditStringTimeout.stop();

    if (!m_hasTempPreeditString)

        return;

    commitCurrentString(false);

}

void QCoeFepInputContext::mouseHandler( int x, QMouseEvent *event)

{

    Q_ASSERT(focusWidget());

    if (event->type() == QEvent::MouseButtonPress && event->button() == Qt::LeftButton) {

        commitCurrentString(true);

        int pos = focusWidget()->inputMethodQuery(Qt::ImCursorPosition).toInt();

        QList<QInputMethodEvent::Attribute> attributes;

        attributes << QInputMethodEvent::Attribute(QInputMethodEvent::Selection, pos + x, 0, QVariant());

        QInputMethodEvent event(QLatin1String(""), attributes);

        sendEvent(event);

    }

}

TCoeInputCapabilities QCoeFepInputContext::inputCapabilities()

{

    if (m_inDestruction || !focusWidget()) {

        return TCoeInputCapabilities(TCoeInputCapabilities::ENone, 0, 0);

    }

    return TCoeInputCapabilities(m_textCapabilities, this, 0);

}

static QTextCharFormat qt_TCharFormat2QTextCharFormat(const TCharFormat &cFormat)

{

    QTextCharFormat qFormat;

    QBrush foreground(QColor(cFormat.iFontPresentation.iTextColor.Internal()));

    qFormat.setForeground(foreground);

    qFormat.setFontStrikeOut(cFormat.iFontPresentation.iStrikethrough == EStrikethroughOn);

    qFormat.setFontUnderline(cFormat.iFontPresentation.iUnderline == EUnderlineOn);

    return qFormat;

}

void QCoeFepInputContext::updateHints(bool mustUpdateInputCapabilities)

{

    QWidget *w = focusWidget();

    if (w) {

        Qt::InputMethodHints hints = w->inputMethodHints();

        if (hints != m_lastImHints) {

            m_lastImHints = hints;

            applyHints(hints);

        } else if (!mustUpdateInputCapabilities) {

            // Optimization. Return immediately if there was no change.

            return;

        }

    }

    queueInputCapabilitiesChanged();

}

void QCoeFepInputContext::applyHints(Qt::InputMethodHints hints)

{

    using namespace Qt;

    commitTemporaryPreeditString();

    bool numbersOnly = hints & ImhDigitsOnly || hints & ImhFormattedNumbersOnly

            || hints & ImhDialableCharactersOnly;

    bool noOnlys = !(numbersOnly || hints & ImhUppercaseOnly

            || hints & ImhLowercaseOnly);

    TInt flags;

    Qt::InputMethodHints oldHints = hints;

    // Some sanity checking. Make sure that only one preference is set.

    InputMethodHints prefs = ImhPreferNumbers | ImhPreferUppercase | ImhPreferLowercase;

    prefs &= hints;

    if (prefs != ImhPreferNumbers && prefs != ImhPreferUppercase && prefs != ImhPreferLowercase) {

        hints &= ~prefs;

    }

    if (!noOnlys) {

        // Make sure that the preference is within the permitted set.

        if (hints & ImhPreferNumbers && !(hints & ImhDigitsOnly || hints & ImhFormattedNumbersOnly

                || hints & ImhDialableCharactersOnly)) {

            hints &= ~ImhPreferNumbers;

        } else if (hints & ImhPreferUppercase && !(hints & ImhUppercaseOnly)) {

            hints &= ~ImhPreferUppercase;

        } else if (hints & ImhPreferLowercase && !(hints & ImhLowercaseOnly)) {

            hints &= ~ImhPreferLowercase;

        }

        // If there is no preference, set it to something within the permitted set.

        if (!(hints & ImhPreferNumbers || hints & ImhPreferUppercase || hints & ImhPreferLowercase)) {

            if (hints & ImhLowercaseOnly) {

                hints |= ImhPreferLowercase;

            } else if (hints & ImhUppercaseOnly) {

                hints |= ImhPreferUppercase;

            } else if (hints & ImhDigitsOnly || hints & ImhFormattedNumbersOnly

                    || hints & ImhDialableCharactersOnly) {

                hints |= ImhPreferNumbers;

            }

        }

    }

    if (hints & ImhPreferNumbers) {

        m_fepState->SetDefaultInputMode(EAknEditorNumericInputMode);

        m_fepState->SetCurrentInputMode(EAknEditorNumericInputMode);

    } else {

        m_fepState->SetDefaultInputMode(EAknEditorTextInputMode);

        m_fepState->SetCurrentInputMode(EAknEditorTextInputMode);

    }

    flags = 0;

    if (numbersOnly) {

        flags |= EAknEditorNumericInputMode;

    }

    if (hints & ImhUppercaseOnly || hints & ImhLowercaseOnly) {

        flags |= EAknEditorTextInputMode;

    }

    if (flags == 0) {

        flags = EAknEditorAllInputModes;

    }

    m_fepState->SetPermittedInputModes(flags);

    ReportAknEdStateEvent(MAknEdStateObserver::EAknEdwinStateInputModeUpdate);

    if (hints & ImhPreferLowercase) {

        m_fepState->SetDefaultCase(EAknEditorLowerCase);

        m_fepState->SetCurrentCase(EAknEditorLowerCase);

    } else if (hints & ImhPreferUppercase) {

        m_fepState->SetDefaultCase(EAknEditorUpperCase);

        m_fepState->SetCurrentCase(EAknEditorUpperCase);

    } else if (hints & ImhNoAutoUppercase) {

        m_fepState->SetDefaultCase(EAknEditorLowerCase);

        m_fepState->SetCurrentCase(EAknEditorLowerCase);

    } else {

        m_fepState->SetDefaultCase(EAknEditorTextCase);

        m_fepState->SetCurrentCase(EAknEditorTextCase);

    }

    flags = 0;

    if (hints & ImhUppercaseOnly) {

        flags |= EAknEditorUpperCase;

    }

    if (hints & ImhLowercaseOnly) {

        flags |= EAknEditorLowerCase;

    }

    if (flags == 0) {

        flags = EAknEditorAllCaseModes;

        if (hints & ImhNoAutoUppercase) {

            flags &= ~EAknEditorTextCase;

        }

    }

    m_fepState->SetPermittedCases(flags);

    ReportAknEdStateEvent(MAknEdStateObserver::EAknEdwinStateCaseModeUpdate);

    flags = 0;

    if (hints & ImhUppercaseOnly && !(hints & ImhLowercaseOnly)

            || hints & ImhLowercaseOnly && !(hints & ImhUppercaseOnly)) {

        flags |= EAknEditorFlagFixedCase;

    }

    // Using T9 and hidden text together may actually crash the FEP, so check for hidden text too.

    if (hints & ImhNoPredictiveText || hints & ImhHiddenText) {

        flags |= EAknEditorFlagNoT9;

    }

    m_fepState->SetFlags(flags);

    ReportAknEdStateEvent(MAknEdStateObserver::EAknEdwinStateFlagsUpdate);

    if (hints & ImhFormattedNumbersOnly) {

        flags = EAknEditorCalculatorNumberModeKeymap;

    } else if (hints & ImhDigitsOnly) {

        flags = EAknEditorPlainNumberModeKeymap;

    } else {

        // ImhDialableCharactersOnly is the fallback as well, so we don't need to check for

        // that flag.

        flags = EAknEditorStandardNumberModeKeymap;

    }

    m_fepState->SetNumericKeymap(static_cast<TAknEditorNumericKeymap>(flags));

    if (hints & ImhEmailCharactersOnly) {

        m_fepState->SetSpecialCharacterTableResourceId(R_AVKON_EMAIL_ADDR_SPECIAL_CHARACTER_TABLE_DIALOG);

    } else if (hints & ImhUrlCharactersOnly) {

        m_fepState->SetSpecialCharacterTableResourceId(R_AVKON_URL_SPECIAL_CHARACTER_TABLE_DIALOG);

    } else {

        m_fepState->SetSpecialCharacterTableResourceId(R_AVKON_SPECIAL_CHARACTER_TABLE_DIALOG);

    }

    if (hints & ImhHiddenText) {

        m_textCapabilities = TCoeInputCapabilities::EAllText | TCoeInputCapabilities::ESecretText;

    } else {

        m_textCapabilities = TCoeInputCapabilities::EAllText;

    }

}

void QCoeFepInputContext::applyFormat(QList<QInputMethodEvent::Attribute> *attributes)

{

    TCharFormat cFormat;

    QColor styleTextColor = QApplication::palette("QLineEdit").text().color();

    TLogicalRgb tontColor(TRgb(styleTextColor.red(), styleTextColor.green(), styleTextColor.blue(), styleTextColor.alpha()));

    cFormat.iFontPresentation.iTextColor = tontColor;

    TInt numChars = 0;

    TInt charPos = 0;

    int oldSize = attributes->size();

    while (m_formatRetriever) {

        m_formatRetriever->GetFormatOfFepInlineText(cFormat, numChars, charPos);

        if (numChars <= 0) {

            // This shouldn't happen according to S60 docs, but apparently does sometimes.

            break;

        }

        attributes->append(QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat,

                                                        charPos,

                                                        numChars,

                                                        QVariant(qt_TCharFormat2QTextCharFormat(cFormat))));

        charPos += numChars;

        if (charPos >= m_preeditString.size()) {

            break;

        }

    }

    if (attributes->size() == oldSize) {

        // S60 didn't provide any format, so let's give our own instead.

        attributes->append(QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat,

                                                        0,

                                                        m_preeditString.size(),

                                                        standardFormat(PreeditFormat)));

    }

}

void QCoeFepInputContext::queueInputCapabilitiesChanged()

{

    if (m_pendingInputCapabilitiesChanged)

        return;

    // Call ensureInputCapabilitiesChanged asynchronously. This is done to improve performance

    // by not updating input capabilities too often. The reason we don't call the Symbian

    // asynchronous version of InputCapabilitiesChanged is because we need to ensure that it

    // is synchronous in some specific cases. Those will call ensureInputCapabilitesChanged.

    QMetaObject::invokeMethod(this, "ensureInputCapabilitiesChanged", Qt::QueuedConnection);