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#include <QtTest/QtTest>

#include <QUndoGroup>

#include <QUndoStack>

#include <QAction>

// Temporarily disabling IRIX due to build issuues with GCC

#if !defined(__sgi) || defined(__sgi) && !defined(__GNUC__)

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

** Commands

*/

class InsertCommand : public QUndoCommand

{

public:

    InsertCommand(QString *str, int idx, const QString &text,

                    QUndoCommand *parent = 0);

    virtual void undo();

    virtual void redo();

private:

    QString *m_str;

    int m_idx;

    QString m_text;

};

class RemoveCommand : public QUndoCommand

{

public:

    RemoveCommand(QString *str, int idx, int len, QUndoCommand *parent = 0);

    virtual void undo();

    virtual void redo();

private:

    QString *m_str;

    int m_idx;

    QString m_text;

};

class AppendCommand : public QUndoCommand

{

public:

    AppendCommand(QString *str, const QString &text, QUndoCommand *parent = 0);

    virtual void undo();

    virtual void redo();

    virtual int id() const;

    virtual bool mergeWith(const QUndoCommand *other);

    bool merged;

private:

    QString *m_str;

    QString m_text;

};

InsertCommand::InsertCommand(QString *str, int idx, const QString &text,

                            QUndoCommand *parent)

    : QUndoCommand(parent)

{

    QVERIFY(str->length() >= idx);

    setText("insert");

    m_str = str;

    m_idx = idx;

    m_text = text;

}

void InsertCommand::redo()

{

    QVERIFY(m_str->length() >= m_idx);

    m_str->insert(m_idx, m_text);

}

void InsertCommand::undo()

{

    QCOMPARE(m_str->mid(m_idx, m_text.length()), m_text);

    m_str->remove(m_idx, m_text.length());

}

RemoveCommand::RemoveCommand(QString *str, int idx, int len, QUndoCommand *parent)

    : QUndoCommand(parent)

{

    QVERIFY(str->length() >= idx + len);

    setText("remove");

    m_str = str;

    m_idx = idx;

    m_text = m_str->mid(m_idx, len);

}

void RemoveCommand::redo()

{

    QCOMPARE(m_str->mid(m_idx, m_text.length()), m_text);

    m_str->remove(m_idx, m_text.length());

}

void RemoveCommand::undo()

{

    QVERIFY(m_str->length() >= m_idx);

    m_str->insert(m_idx, m_text);

}

AppendCommand::AppendCommand(QString *str, const QString &text, QUndoCommand *parent)

    : QUndoCommand(parent)

{

    setText("append");

    m_str = str;

    m_text = text;

    merged = false;

}

void AppendCommand::redo()

{

    m_str->append(m_text);

}

void AppendCommand::undo()

{

    QCOMPARE(m_str->mid(m_str->length() - m_text.length()), m_text);

    m_str->truncate(m_str->length() - m_text.length());

}

int AppendCommand::id() const

{

    return 1;

}

bool AppendCommand::mergeWith(const QUndoCommand *other)

{

    if (other->id() != id())

        return false;

    m_text += static_cast<const AppendCommand*>(other)->m_text;

    merged = true;

    return true;

}

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

** tst_QUndoStack

*/

class tst_QUndoGroup : public QObject

{

    Q_OBJECT

public:

    tst_QUndoGroup();

private slots:

    void setActive();

    void addRemoveStack();

    void deleteStack();

    void checkSignals();

    void addStackAndDie();

};

tst_QUndoGroup::tst_QUndoGroup()

{

}

void tst_QUndoGroup::setActive()

{

    QUndoGroup group;

    QUndoStack stack1(&group), stack2(&group);

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    QCOMPARE(stack1.isActive(), false);

    QCOMPARE(stack2.isActive(), false);

    QUndoStack stack3;

    QCOMPARE(stack3.isActive(), true);

    group.addStack(&stack3);

    QCOMPARE(stack3.isActive(), false);

    stack1.setActive();

    QCOMPARE(group.activeStack(), &stack1);

    QCOMPARE(stack1.isActive(), true);

    QCOMPARE(stack2.isActive(), false);

    QCOMPARE(stack3.isActive(), false);

    group.setActiveStack(&stack2);

    QCOMPARE(group.activeStack(), &stack2);

    QCOMPARE(stack1.isActive(), false);

    QCOMPARE(stack2.isActive(), true);

    QCOMPARE(stack3.isActive(), false);

    group.removeStack(&stack2);

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    QCOMPARE(stack1.isActive(), false);

    QCOMPARE(stack2.isActive(), true);

    QCOMPARE(stack3.isActive(), false);

    group.removeStack(&stack2);

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    QCOMPARE(stack1.isActive(), false);

    QCOMPARE(stack2.isActive(), true);

    QCOMPARE(stack3.isActive(), false);

}

void tst_QUndoGroup::addRemoveStack()

{

    QUndoGroup group;

    QUndoStack stack1(&group);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << &stack1);

    QUndoStack stack2;

    group.addStack(&stack2);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << &stack1 << &stack2);

    group.addStack(&stack1);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << &stack1 << &stack2);

    group.removeStack(&stack1);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << &stack2);

    group.removeStack(&stack1);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << &stack2);

    group.removeStack(&stack2);

    QCOMPARE(group.stacks(), QList<QUndoStack*>());

}

void tst_QUndoGroup::deleteStack()

{

    QUndoGroup group;

    QUndoStack *stack1 = new QUndoStack(&group);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << stack1);

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    stack1->setActive();

    QCOMPARE(group.activeStack(), stack1);

    QUndoStack *stack2 = new QUndoStack(&group);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << stack1 << stack2);

    QCOMPARE(group.activeStack(), stack1);

    QUndoStack *stack3 = new QUndoStack(&group);

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << stack1 << stack2 << stack3);

    QCOMPARE(group.activeStack(), stack1);

    delete stack2;

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << stack1 << stack3);

    QCOMPARE(group.activeStack(), stack1);

    delete stack1;

    QCOMPARE(group.stacks(), QList<QUndoStack*>() << stack3);

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    stack3->setActive(false);

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    stack3->setActive(true);

    QCOMPARE(group.activeStack(), stack3);

    group.removeStack(stack3);

    QCOMPARE(group.stacks(), QList<QUndoStack*>());

    QCOMPARE(group.activeStack(), (QUndoStack*)0);

    delete stack3;

}

static QString glue(const QString &s1, const QString &s2)

{

    QString result;

    result.append(s1);

    if (!s1.isEmpty() && !s2.isEmpty())

        result.append(' ');

    result.append(s2);

    return result;

}

#define CHECK_STATE(_activeStack, _clean, _canUndo, _undoText, _canRedo, _redoText, \

                    _cleanChanged, _indexChanged, _undoChanged, _redoChanged) \

    QCOMPARE(group.activeStack(), (QUndoStack*)_activeStack); \

    QCOMPARE(group.isClean(), _clean); \

    QCOMPARE(group.canUndo(), _canUndo); \

    QCOMPARE(group.undoText(), QString(_undoText)); \

    QCOMPARE(group.canRedo(), _canRedo); \

    QCOMPARE(group.redoText(), QString(_redoText)); \

    if (_indexChanged) { \

        QCOMPARE(indexChangedSpy.count(), 1); \

        indexChangedSpy.clear(); \

    } else { \

        QCOMPARE(indexChangedSpy.count(), 0); \

    } \

    if (_cleanChanged) { \

        QCOMPARE(cleanChangedSpy.count(), 1); \

        QCOMPARE(cleanChangedSpy.at(0).at(0).toBool(), _clean); \

        cleanChangedSpy.clear(); \

    } else { \

        QCOMPARE(cleanChangedSpy.count(), 0); \

    } \

    if (_undoChanged) { \

        QCOMPARE(canUndoChangedSpy.count(), 1); \

        QCOMPARE(canUndoChangedSpy.at(0).at(0).toBool(), _canUndo); \

        QCOMPARE(undo_action->isEnabled(), _canUndo); \

        QCOMPARE(undoTextChangedSpy.count(), 1); \

        QCOMPARE(undoTextChangedSpy.at(0).at(0).toString(), QString(_undoText)); \

        QCOMPARE(undo_action->text(), glue("foo", _undoText)); \

        canUndoChangedSpy.clear(); \

        undoTextChangedSpy.clear(); \

    } else { \

        QCOMPARE(canUndoChangedSpy.count(), 0); \

        QCOMPARE(undoTextChangedSpy.count(), 0); \

    } \

    if (_redoChanged) { \

        QCOMPARE(canRedoChangedSpy.count(), 1); \

        QCOMPARE(canRedoChangedSpy.at(0).at(0).toBool(), _canRedo); \

        QCOMPARE(redo_action->isEnabled(), _canRedo); \

        QCOMPARE(redoTextChangedSpy.count(), 1); \

        QCOMPARE(redoTextChangedSpy.at(0).at(0).toString(), QString(_redoText)); \

        QCOMPARE(redo_action->text(), glue("bar", _redoText)); \

        canRedoChangedSpy.clear(); \

        redoTextChangedSpy.clear(); \

    } else { \

        QCOMPARE(canRedoChangedSpy.count(), 0); \

        QCOMPARE(redoTextChangedSpy.count(), 0); \

    }

void tst_QUndoGroup::checkSignals()

{

    QUndoGroup group;

    QAction *undo_action = group.createUndoAction(0, QString("foo"));

    QAction *redo_action = group.createRedoAction(0, QString("bar"));

    QSignalSpy indexChangedSpy(&group, SIGNAL(indexChanged(int)));

    QSignalSpy cleanChangedSpy(&group, SIGNAL(cleanChanged(bool)));

    QSignalSpy canUndoChangedSpy(&group, SIGNAL(canUndoChanged(bool)));

    QSignalSpy undoTextChangedSpy(&group, SIGNAL(undoTextChanged(QString)));

    QSignalSpy canRedoChangedSpy(&group, SIGNAL(canRedoChanged(bool)));

    QSignalSpy redoTextChangedSpy(&group, SIGNAL(redoTextChanged(QString)));

    QString str;

    CHECK_STATE(0,          // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                false,      // canRedo

                "",         // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    group.undo();

    CHECK_STATE(0,     // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                false,      // canRedo

                "",         // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    group.redo();

    CHECK_STATE(0,     // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                false,      // canRedo

                "",         // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    QUndoStack *stack1 = new QUndoStack(&group);

    CHECK_STATE(0,          // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                false,      // canRedo

                "",         // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    stack1->push(new AppendCommand(&str, "foo"));

    CHECK_STATE(0,          // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                false,      // canRedo

                "",         // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    stack1->setActive();

    CHECK_STATE(stack1,     // activeStack

                false,      // clean

                true,       // canUndo

                "append",   // undoText

                false,      // canRedo

                "",         // redoText

                true,       // cleanChanged

                true,       // indexChanged

                true,       // undoChanged

                true)       // redoChanged

    stack1->push(new InsertCommand(&str, 0, "bar"));

    CHECK_STATE(stack1,     // activeStack

                false,      // clean

                true,       // canUndo

                "insert",   // undoText

                false,      // canRedo

                "",         // redoText

                false,      // cleanChanged

                true,       // indexChanged

                true,       // undoChanged

                true)       // redoChanged

    stack1->undo();

    CHECK_STATE(stack1,     // activeStack

                false,      // clean

                true,       // canUndo

                "append",   // undoText

                true,       // canRedo

                "insert",   // redoText

                false,      // cleanChanged

                true,       // indexChanged

                true,       // undoChanged

                true)       // redoChanged

    stack1->undo();

    CHECK_STATE(stack1,     // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                true,       // canRedo

                "append",   // redoText

                true,       // cleanChanged

                true,       // indexChanged

                true,       // undoChanged

                true)       // redoChanged

    stack1->undo();

    CHECK_STATE(stack1,     // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                true,       // canRedo

                "append",   // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    group.undo();

    CHECK_STATE(stack1,     // activeStack

                true,       // clean

                false,      // canUndo

                "",         // undoText

                true,       // canRedo

                "append",   // redoText

                false,      // cleanChanged

                false,      // indexChanged

                false,      // undoChanged

                false)      // redoChanged

    group.redo();

    CHECK_STATE(stack1,     // activeStack

                false,      // clean

                true,       // canUndo

                "append",   // undoText

                true,       // canRedo

                "insert",   // redoText

                true,       // cleanChanged

                true,       // indexChanged

                true,       // undoChanged