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#include "commands.h"

static const int setShapeRectCommandId = 1;

static const int setShapeColorCommandId = 2;

/******************************************************************************

** AddShapeCommand

*/

AddShapeCommand::AddShapeCommand(Document *doc, const Shape &shape, QUndoCommand *parent)

    : QUndoCommand(parent)

{

    m_doc = doc;

    m_shape = shape;

}

void AddShapeCommand::undo()

{

    m_doc->deleteShape(m_shapeName);

}

void AddShapeCommand::redo()

{

    // A shape only gets a name when it is inserted into a document

    m_shapeName = m_doc->addShape(m_shape);

    setText(QObject::tr("Add %1").arg(m_shapeName));

}

/******************************************************************************

** RemoveShapeCommand

*/

RemoveShapeCommand::RemoveShapeCommand(Document *doc, const QString &shapeName,

                                        QUndoCommand *parent)

    : QUndoCommand(parent)

{

    setText(QObject::tr("Remove %1").arg(shapeName));

    m_doc = doc;

    m_shape = doc->shape(shapeName);

    m_shapeName = shapeName;

}

void RemoveShapeCommand::undo()

{

    m_shapeName = m_doc->addShape(m_shape);

}

void RemoveShapeCommand::redo()

{

    m_doc->deleteShape(m_shapeName);

}

/******************************************************************************

** SetShapeColorCommand

*/

SetShapeColorCommand::SetShapeColorCommand(Document *doc, const QString &shapeName,

                                            const QColor &color, QUndoCommand *parent)

    : QUndoCommand(parent)

{

    setText(QObject::tr("Set %1's color").arg(shapeName));

    m_doc = doc;

    m_shapeName = shapeName;

    m_oldColor = doc->shape(shapeName).color();

    m_newColor = color;

}

void SetShapeColorCommand::undo()

{

    m_doc->setShapeColor(m_shapeName, m_oldColor);

}

void SetShapeColorCommand::redo()

{

    m_doc->setShapeColor(m_shapeName, m_newColor);

}

bool SetShapeColorCommand::mergeWith(const QUndoCommand *command)

{

    if (command->id() != setShapeColorCommandId)

        return false;

    const SetShapeColorCommand *other = static_cast<const SetShapeColorCommand*>(command);

    if (m_shapeName != other->m_shapeName)

        return false;

    m_newColor = other->m_newColor;

    return true;

}

int SetShapeColorCommand::id() const

{

    return setShapeColorCommandId;

}

/******************************************************************************

** SetShapeRectCommand

*/

SetShapeRectCommand::SetShapeRectCommand(Document *doc, const QString &shapeName,

                                            const QRect &rect, QUndoCommand *parent)

    : QUndoCommand(parent)

{

    setText(QObject::tr("Change %1's geometry").arg(shapeName));

    m_doc = doc;

    m_shapeName = shapeName;

    m_oldRect = doc->shape(shapeName).rect();

    m_newRect = rect;

}

void SetShapeRectCommand::undo()

{

    m_doc->setShapeRect(m_shapeName, m_oldRect);

}

void SetShapeRectCommand::redo()

{

    m_doc->setShapeRect(m_shapeName, m_newRect);

}

bool SetShapeRectCommand::mergeWith(const QUndoCommand *command)

{

    if (command->id() != setShapeRectCommandId)

        return false;

    const SetShapeRectCommand *other = static_cast<const SetShapeRectCommand*>(command);

    if (m_shapeName != other->m_shapeName)

        return false;

    m_newRect = other->m_newRect;

    return true;

}

int SetShapeRectCommand::id() const

{

    return setShapeRectCommandId;

}