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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 <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_isEditing(false),

      m_inDestruction(false),

      m_pendingInputCapabilitiesChanged(false),

      m_cursorVisibility(1),

      m_inlinePosition(0),

      m_formatRetriever(0),

      m_pointerHandler(0)

{

    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( 0 );

    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()

{

    CCoeFep* fep = CCoeEnv::Static()->Fep();

    if (fep)

        fep->CancelTransaction();

}

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

{

    QT_TRAP_THROWING(m_fepState->ReportAknEdStateEventL(aEventType));

}

void QCoeFepInputContext::update()

{

    updateHints(false);

	// :QTP: Always show virtual keyboard - fix needed to use feature manager

    // 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(false);

    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()) {

        ctrl->SetFocus(false);

        ctrl->SetFocus(true);

    }

}

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::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;

    if (event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease) {

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

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

        if (keyEvent->key() == Qt::Key_F20 && 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;

        }

    }

	// :QTP: Always show virtual keyboard - fix needed to use feature manager

    // For pre-5.0 SDKs, we don't launch the keyboard.

	/*

    if (QSysInfo::s60Version() != QSysInfo::SV_S60_5_0) {

        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::mouseHandler( int x, QMouseEvent *event)

{

    Q_ASSERT(m_isEditing);

    Q_ASSERT(focusWidget());

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

        commitCurrentString(false);

        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;

    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 & ImhHiddenText) {

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

    } else {

        m_textCapabilities = TCoeInputCapabilities::EAllText;

    }

}

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

{

    TCharFormat cFormat;

    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);

    m_pendingInputCapabilitiesChanged = true;

}

void QCoeFepInputContext::ensureInputCapabilitiesChanged()

{

    if (!m_pendingInputCapabilitiesChanged)

        return;

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

    // but is synchronous, rather than asynchronous.

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

    m_pendingInputCapabilitiesChanged = false;

}

void QCoeFepInputContext::StartFepInlineEditL(const TDesC& aInitialInlineText,

        TInt aPositionOfInsertionPointInInlineText, TBool aCursorVisibility, const MFormCustomDraw* /*aCustomDraw*/,

        MFepInlineTextFormatRetriever& aInlineTextFormatRetriever,

        MFepPointerEventHandlerDuringInlineEdit& aPointerEventHandlerDuringInlineEdit)

{

    QWidget *w = focusWidget();

    if (!w)

        return;

    m_isEditing = true;

    QList<QInputMethodEvent::Attribute> attributes;

    m_cursorVisibility = aCursorVisibility ? 1 : 0;

    m_inlinePosition = aPositionOfInsertionPointInInlineText;

    m_preeditString = qt_TDesC2QString(aInitialInlineText);

    m_formatRetriever = &aInlineTextFormatRetriever;

    m_pointerHandler = &aPointerEventHandlerDuringInlineEdit;

    applyFormat(&attributes);

    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::Cursor,

                                                   m_inlinePosition,

                                                   m_cursorVisibility,

                                                   QVariant()));

    QInputMethodEvent event(m_preeditString, attributes);

    sendEvent(event);

}

void QCoeFepInputContext::UpdateFepInlineTextL(const TDesC& aNewInlineText,

        TInt aPositionOfInsertionPointInInlineText)

{

    QWidget *w = focusWidget();

    if (!w)

        return;

    m_inlinePosition = aPositionOfInsertionPointInInlineText;

    QList<QInputMethodEvent::Attribute> attributes;

    applyFormat(&attributes);

    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::Cursor,

                                                   m_inlinePosition,

                                                   m_cursorVisibility,

                                                   QVariant()));

    m_preeditString = qt_TDesC2QString(aNewInlineText);

    QInputMethodEvent event(m_preeditString, attributes);

    sendEvent(event);

}

void QCoeFepInputContext::SetInlineEditingCursorVisibilityL(TBool aCursorVisibility)

{

    QWidget *w = focusWidget();

    if (!w)

        return;

    m_cursorVisibility = aCursorVisibility ? 1 : 0;

    QList<QInputMethodEvent::Attribute> attributes;

    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::Cursor,

                                                   m_inlinePosition,

                                                   m_cursorVisibility,

                                                   QVariant()));

    QInputMethodEvent event(m_preeditString, attributes);

    sendEvent(event);

}

void QCoeFepInputContext::CancelFepInlineEdit()

{

    QList<QInputMethodEvent::Attribute> attributes;

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

    event.setCommitString(QLatin1String(""), 0, 0);

    m_preeditString.clear();

    sendEvent(event);

    m_isEditing = false;

}

TInt QCoeFepInputContext::DocumentLengthForFep() const

{

    QWidget *w = focusWidget();

    if (!w)

        return 0;

    QVariant variant = w->inputMethodQuery(Qt::ImSurroundingText);

    return variant.value<QString>().size() + m_preeditString.size();

}

TInt QCoeFepInputContext::DocumentMaximumLengthForFep() const

{