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#include "qapplication.h"

#include "qevent.h"

#include "qbitmap.h"

#include "qstyle.h"

#include "qmenubar.h"

#include "private/qt_s60_p.h"

#include "private/qmenu_p.h"

#include "private/qsoftkeymanager_p.h"

#include "private/qsoftkeymanager_s60_p.h"

#include "private/qobject_p.h"

#include <eiksoftkeyimage.h>

#include <eikcmbut.h>

#ifndef QT_NO_SOFTKEYMANAGER

QT_BEGIN_NAMESPACE

const int S60_COMMAND_START = 6000;

const int LSK_POSITION = 0;

const int MSK_POSITION = 3;

const int RSK_POSITION = 2;

QSoftKeyManagerPrivateS60::QSoftKeyManagerPrivateS60() : cbaHasImage(4) // 4 since MSK position index is 3

{

    cachedCbaIconSize[0] = QSize(0,0);

    cachedCbaIconSize[1] = QSize(0,0);

    cachedCbaIconSize[2] = QSize(0,0);

    cachedCbaIconSize[3] = QSize(0,0);

}

bool QSoftKeyManagerPrivateS60::skipCbaUpdate()

{

    // Lets not update softkeys if

    // 1. We don't have application panes, i.e. cba

    // 2. Our CBA is not active, i.e. S60 native dialog or menu with custom CBA is shown

    //    2.1. Except if thre is no current CBA at all and WindowSoftkeysRespondHint is set

    // Note: Cannot use IsDisplayingMenuOrDialog since CBA update can be triggered before

    // menu/dialog CBA is actually displayed i.e. it is being costructed.

    CEikButtonGroupContainer *appUiCba = S60->buttonGroupContainer();

    // CEikButtonGroupContainer::Current returns 0 if CBA is not visible at all

    CEikButtonGroupContainer *currentCba = CEikButtonGroupContainer::Current();

    // Check if softkey need to be update even they are not visible

    bool cbaRespondsWhenInvisible = false;

    QWidget *window = QApplication::activeWindow();

    if (window && (window->windowFlags() & Qt::WindowSoftkeysRespondHint))

        cbaRespondsWhenInvisible = true;

    if (QApplication::testAttribute(Qt::AA_S60DontConstructApplicationPanes)

            || (appUiCba != currentCba && !cbaRespondsWhenInvisible)) {

        return true;

    }

    return false;

}

void QSoftKeyManagerPrivateS60::ensureCbaVisibilityAndResponsiviness(CEikButtonGroupContainer &cba)

{

    RDrawableWindow *cbaWindow = cba.DrawableWindow();

    Q_ASSERT_X(cbaWindow, Q_FUNC_INFO, "Native CBA does not have window!");

    // Make sure CBA is visible, i.e. CBA window is on top

    cbaWindow->SetOrdinalPosition(0);

    // Qt shares same CBA instance between top-level widgets,

    // make sure we are not faded by underlying window.

    cbaWindow->SetFaded(EFalse, RWindowTreeNode::EFadeIncludeChildren);

    // Modal dialogs capture pointer events, but shared cba instance

    // shall stay responsive. Raise pointer capture priority to keep

    // softkeys responsive in modal dialogs

    cbaWindow->SetPointerCapturePriority(1);

}

void QSoftKeyManagerPrivateS60::clearSoftkeys(CEikButtonGroupContainer &cba)

{

    QT_TRAP_THROWING(

        //Using -1 instead of EAknSoftkeyEmpty to avoid flickering.

        cba.SetCommandL(0, -1, KNullDesC);

        // TODO: Should we clear also middle SK?

        cba.SetCommandL(2, -1, KNullDesC);

    );

    realSoftKeyActions.clear();

}

QString QSoftKeyManagerPrivateS60::softkeyText(QAction &softkeyAction)

{

    // In S60 softkeys and menu items do not support key accelerators (i.e.

    // CTRL+X). Therefore, removing the accelerator characters from both softkey

    // and menu item texts.

    const int underlineShortCut = QApplication::style()->styleHint(QStyle::SH_UnderlineShortcut);

    QString iconText = softkeyAction.iconText();

    return underlineShortCut ? softkeyAction.text() : iconText;

}

QAction *QSoftKeyManagerPrivateS60::highestPrioritySoftkey(QAction::SoftKeyRole role)

{

    QAction *ret = NULL;

    // Priority look up is two level

    // 1. First widget with softkeys always has highest priority

    for (int level = 0; !ret; level++) {

        // 2. Highest priority action within widget

        QList<QAction*> actions = requestedSoftKeyActions.values(level);

        if (actions.isEmpty())

            break;

        qSort(actions.begin(), actions.end(), QSoftKeyManagerPrivateS60::actionPriorityMoreThan);

        foreach (QAction *action, actions) {

            if (action->softKeyRole() == role) {

                ret = action;

                break;

            }

        }

    }

    return ret;

}

bool QSoftKeyManagerPrivateS60::actionPriorityMoreThan(const QAction *firstItem, const QAction *secondItem)

{

    return firstItem->priority() > secondItem->priority();

}

void QSoftKeyManagerPrivateS60::setNativeSoftkey(CEikButtonGroupContainer &cba,

                                              TInt position, TInt command, const TDesC &text)

{

    // Calling SetCommandL causes CBA redraw

    QT_TRAP_THROWING(cba.SetCommandL(position, command, text));

}

QPoint QSoftKeyManagerPrivateS60::softkeyIconPosition(int position, QSize sourceSize, QSize targetSize)

{

    QPoint iconPosition(0,0);

    switch( AknLayoutUtils::CbaLocation() )

        {

        case AknLayoutUtils::EAknCbaLocationBottom:

            // RSK must be moved to right, LSK in on correct position by default

            if (position == RSK_POSITION)

                iconPosition.setX(targetSize.width() - sourceSize.width());

            break;

        case AknLayoutUtils::EAknCbaLocationRight:

        case AknLayoutUtils::EAknCbaLocationLeft:

            // Already in correct position

        default:

            break;

        }

    // Align horizontally to center

    iconPosition.setY((targetSize.height() - sourceSize.height()) >> 1);

    return iconPosition;

}

QPixmap QSoftKeyManagerPrivateS60::prepareSoftkeyPixmap(QPixmap src, int position, QSize targetSize)

{

    QPixmap target(targetSize);

    target.fill(Qt::transparent);

    QPainter p;

    p.begin(&target);

    p.drawPixmap(softkeyIconPosition(position, src.size(), targetSize), src);

    p.end();

    return target;

}

bool QSoftKeyManagerPrivateS60::isOrientationLandscape()

{

    // Hard to believe that there is no public API in S60 to

    // get current orientation. This workaround works with currently supported resolutions

    return  S60->screenHeightInPixels <  S60->screenWidthInPixels;

}

QSize QSoftKeyManagerPrivateS60::cbaIconSize(CEikButtonGroupContainer *cba, int position)

{

    int index = position;

    index += isOrientationLandscape() ? 0 : 1;

    if(cachedCbaIconSize[index].isNull()) {

        // Only way I figured out to get CBA icon size without RnD SDK, was

        // to set some dummy icon to CBA first and then ask CBA button CCoeControl::Size()

        // The returned value is cached to avoid unnecessary icon setting every time.

        const bool left = (position == LSK_POSITION);

        if(position == LSK_POSITION || position == RSK_POSITION) {

            CEikImage* tmpImage = NULL;

            QT_TRAP_THROWING(tmpImage = new (ELeave) CEikImage);

            EikSoftkeyImage::SetImage(cba, *tmpImage, left); // Takes myimage ownership

            int command = S60_COMMAND_START + position;

            setNativeSoftkey(*cba, position, command, KNullDesC());

            cachedCbaIconSize[index] = qt_TSize2QSize(cba->ControlOrNull(command)->Size());

            EikSoftkeyImage::SetLabel(cba, left);

            if(cachedCbaIconSize[index] == QSize(138,72)) {

                // Hack for S60 5.0 (5800) landscape orientation, which return wrong icon size

                cachedCbaIconSize[index] = QSize(60,60);

            }

        }

    }

    return cachedCbaIconSize[index];

}

bool QSoftKeyManagerPrivateS60::setSoftkeyImage(CEikButtonGroupContainer *cba,

                                            QAction &action, int position)

{

    bool ret = false;

    const bool left = (position == LSK_POSITION);

    if(position == LSK_POSITION || position == RSK_POSITION) {

        QIcon icon = action.icon();

        if (!icon.isNull()) {

            // Get size of CBA icon area based on button position and orientation

            QSize requiredIconSize = cbaIconSize(cba, position);

            // Get pixmap out of icon based on preferred size, the aspect ratio is kept

            QPixmap pmWihtAspectRatio = icon.pixmap(requiredIconSize);

            // Native softkeys require that pixmap size is exactly the same as requiredIconSize

            // prepareSoftkeyPixmap creates a new pixmap with requiredIconSize and blits the 'pmWihtAspectRatio'

            // to correct location of it

            QPixmap softkeyPixmap = prepareSoftkeyPixmap(pmWihtAspectRatio, position, requiredIconSize);

            QPixmap softkeyAlpha = softkeyPixmap.alphaChannel();

            // Alpha channel in 5.1 and older devices need to be inverted

            // TODO: Switch to use toSymbianCFbsBitmap with invert when available

            if(QSysInfo::s60Version() <= QSysInfo::SV_S60_5_1) {

                QImage alphaImage = softkeyAlpha.toImage();

                alphaImage.invertPixels();

                softkeyAlpha = QPixmap::fromImage(alphaImage);

            }

            CFbsBitmap* nBitmap = softkeyPixmap.toSymbianCFbsBitmap();

            CFbsBitmap* nMask = softkeyAlpha.toSymbianCFbsBitmap();

            CEikImage* myimage = new (ELeave) CEikImage;

            myimage->SetPicture( nBitmap, nMask ); // nBitmap and nMask ownership transfered

            EikSoftkeyImage::SetImage(cba, *myimage, left); // Takes myimage ownership

            cbaHasImage[position] = true;

            ret = true;

        } else {

            // Restore softkey to text based

            if (cbaHasImage[position]) {

                EikSoftkeyImage::SetLabel(cba, left);

                cbaHasImage[position] = false;

            }

        }

    }

    return ret;

}

bool QSoftKeyManagerPrivateS60::setSoftkey(CEikButtonGroupContainer &cba,

                                        QAction::SoftKeyRole role, int position)

{

    QAction *action = highestPrioritySoftkey(role);

    if (action) {

        setSoftkeyImage(&cba, *action, position);

        QString text = softkeyText(*action);

        TPtrC nativeText = qt_QString2TPtrC(text);

        int command = S60_COMMAND_START + position;

        setNativeSoftkey(cba, position, command, nativeText);

        const bool dimmed = !action->isEnabled() && !QSoftKeyManager::isForceEnabledInSofkeys(action);

        cba.DimCommand(command, dimmed);

        realSoftKeyActions.insert(command, action);

        return true;

    }

    return false;

}

bool QSoftKeyManagerPrivateS60::setLeftSoftkey(CEikButtonGroupContainer &cba)

{

    return setSoftkey(cba, QAction::PositiveSoftKey, LSK_POSITION);

}

bool QSoftKeyManagerPrivateS60::setMiddleSoftkey(CEikButtonGroupContainer &cba)

{

    // Note: In order to get MSK working, application has to have EAknEnableMSK flag set

    // Currently it is not possible very easily)

    // For more information see: http://wiki.forum.nokia.com/index.php/Middle_softkey_usage

    return setSoftkey(cba, QAction::SelectSoftKey, MSK_POSITION);

}

bool QSoftKeyManagerPrivateS60::setRightSoftkey(CEikButtonGroupContainer &cba)

{

    if (!setSoftkey(cba, QAction::NegativeSoftKey, RSK_POSITION)) {

        if (windowType != Qt::Dialog && windowType != Qt::Popup) {

            QString text(QSoftKeyManager::tr("Exit"));

            TPtrC nativeText = qt_QString2TPtrC(text);

            if (cbaHasImage[RSK_POSITION]) {

                EikSoftkeyImage::SetLabel(&cba, false);

                cbaHasImage[RSK_POSITION] = false;

            }

            setNativeSoftkey(cba, RSK_POSITION, EAknSoftkeyExit, nativeText);

            cba.DimCommand(EAknSoftkeyExit, false);

            return true;

        }

    }

    return false;

}

void QSoftKeyManagerPrivateS60::setSoftkeys(CEikButtonGroupContainer &cba)

{

    int requestedSoftkeyCount = requestedSoftKeyActions.count();

    const int maxSoftkeyCount = 2; // TODO: differs based on orientation ans S60 versions (some have MSK)

    if (requestedSoftkeyCount > maxSoftkeyCount) {

        // We have more softkeys than available slots

        // Put highest priority negative action to RSK and Options menu with rest of softkey actions to LSK

        // TODO: Build menu

        setLeftSoftkey(cba);

        if(AknLayoutUtils::MSKEnabled())

            setMiddleSoftkey(cba);

        setRightSoftkey(cba);

    } else {

        // We have less softkeys than available slots

        // Put softkeys to request slots based on role

        setLeftSoftkey(cba);

        if(AknLayoutUtils::MSKEnabled())

            setMiddleSoftkey(cba);

        setRightSoftkey(cba);

    }

}

void QSoftKeyManagerPrivateS60::updateSoftKeys_sys()

{

    if (skipCbaUpdate())

        return;

    CEikButtonGroupContainer *nativeContainer = S60->buttonGroupContainer();

    Q_ASSERT_X(nativeContainer, Q_FUNC_INFO, "Native CBA does not exist!");

    ensureCbaVisibilityAndResponsiviness(*nativeContainer);

    clearSoftkeys(*nativeContainer);

    setSoftkeys(*nativeContainer);

    nativeContainer->DrawDeferred(); // 3.1 needs an extra invitation

}

bool QSoftKeyManagerPrivateS60::handleCommand(int command)

{

    QAction *action = realSoftKeyActions.value(command);

    if (action) {

        QVariant property = action->property(MENU_ACTION_PROPERTY);

        if (property.isValid() && property.toBool()) {

        } else if (action->menu()) {

            // TODO: This is hack, in order to use exising QMenuBar implementation for Symbian

            // menubar needs to have widget to which it is associated. Since we want to associate

            // to action and pass that for QMenuBar. This associates the menubar to action, and we

            // can have own menubar for each action.

            QWidget *actionContainer = action->property("_q_action_widget").value<QWidget*>();

            if(!actionContainer) {

                actionContainer = new QWidget(action->parentWidget());

                QMenuBar *menuBar = new QMenuBar(actionContainer);

                foreach(QAction *menuAction, action->menu()->actions()) {

                    QMenu *menu = menuAction->menu();

                    if(menu)

                        menuBar->addMenu(action->menu());

                    else

                        menuBar->addAction(menuAction);

                }

                QVariant v;

                v.setValue(actionContainer);

                action->setProperty("_q_action_widget", v);

            }

            qt_symbian_next_menu_from_action(actionContainer);

        }

    }

    return false;

}

QT_END_NAMESPACE

#endif //QT_NO_SOFTKEYMANAGER