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#include "qdesigner_command2_p.h"

#include "formwindowbase_p.h"

#include "layoutinfo_p.h"

#include "qdesigner_command_p.h"

#include "widgetfactory_p.h"

#include "qlayout_widget_p.h"

#include <QtDesigner/QDesignerFormEditorInterface>

#include <QtDesigner/QDesignerMetaDataBaseInterface>

#include <QtGui/QApplication>

#include <QtGui/QLayout>

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

MorphLayoutCommand::MorphLayoutCommand(QDesignerFormWindowInterface *formWindow) :

    QDesignerFormWindowCommand(QString(), formWindow),

    m_breakLayoutCommand(new BreakLayoutCommand(formWindow)),

    m_layoutCommand(new LayoutCommand(formWindow)),

    m_newType(LayoutInfo::VBox),

    m_layoutBase(0)

{

}

MorphLayoutCommand::~MorphLayoutCommand()

{

    delete m_layoutCommand;

    delete m_breakLayoutCommand;

}

bool MorphLayoutCommand::init(QWidget *w, int newType)

{

    int oldType;

    QDesignerFormWindowInterface *fw = formWindow();

    if (!canMorph(fw, w, &oldType) || oldType == newType)

        return false;

    m_layoutBase = w;

    m_newType = newType;

    // Find all managed widgets

    m_widgets.clear();

    const QLayout *layout = LayoutInfo::managedLayout(fw->core(), w);

    const int count = layout->count();

    for (int i = 0; i < count ; i++) {

        if (QWidget *w = layout->itemAt(i)->widget())

            if (fw->isManaged(w))

                m_widgets.push_back(w);

    }

    const bool reparentLayoutWidget = false; // leave QLayoutWidget intact

    m_breakLayoutCommand->init(m_widgets, m_layoutBase, reparentLayoutWidget);

    m_layoutCommand->init(m_layoutBase, m_widgets, static_cast<LayoutInfo::Type>(m_newType), m_layoutBase, reparentLayoutWidget);

    setText(formatDescription(core(), m_layoutBase, oldType, newType));

    return true;

}

bool MorphLayoutCommand::canMorph(const QDesignerFormWindowInterface *formWindow, QWidget *w, int *ptrToCurrentType)

{

    if (ptrToCurrentType)

        *ptrToCurrentType = LayoutInfo::NoLayout;

    // We want a managed widget or a container page

    // with a level-0 managed layout

    QDesignerFormEditorInterface *core = formWindow->core();

    QLayout *layout = LayoutInfo::managedLayout(core, w);

    if (!layout)

        return false;

    const LayoutInfo::Type type = LayoutInfo::layoutType(core, layout);

    if (ptrToCurrentType)

        *ptrToCurrentType = type;

    switch (type) {

    case LayoutInfo::HBox:

    case LayoutInfo::VBox:

    case LayoutInfo::Grid:

    case LayoutInfo::Form:

        return true;

        break;

    case LayoutInfo::NoLayout:

    case LayoutInfo::HSplitter: // Nothing doing

    case LayoutInfo::VSplitter:

    case LayoutInfo::UnknownLayout:

        break;

    }

    return false;

}

void MorphLayoutCommand::redo()

{

    m_breakLayoutCommand->redo();

    m_layoutCommand->redo();

    /* Transfer applicable properties which is a cross-section of the modified

     * properties except object name. */

    if (const LayoutProperties *properties = m_breakLayoutCommand->layoutProperties()) {

        const int oldMask = m_breakLayoutCommand->propertyMask();

        QLayout *newLayout = LayoutInfo::managedLayout(core(), m_layoutBase);

        const int newMask = LayoutProperties::visibleProperties(newLayout);

        const int applicableMask = (oldMask & newMask) & ~LayoutProperties::ObjectNameProperty;

        if (applicableMask)

            properties->toPropertySheet(core(), newLayout, applicableMask);

    }

}

void MorphLayoutCommand::undo()

{

    m_layoutCommand->undo();

    m_breakLayoutCommand->undo();

}

QString MorphLayoutCommand::formatDescription(QDesignerFormEditorInterface * /* core*/, const QWidget *w, int oldType, int newType)

{

    const QString oldName = LayoutInfo::layoutName(static_cast<LayoutInfo::Type>(oldType));

    const QString newName = LayoutInfo::layoutName(static_cast<LayoutInfo::Type>(newType));

    const QString widgetName = qobject_cast<const QLayoutWidget*>(w) ? w->layout()->objectName() : w->objectName();

    return QApplication::translate("Command", "Change layout of '%1' from %2 to %3").arg(widgetName, oldName, newName);

}

} // namespace qdesigner_internal

QT_END_NAMESPACE