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

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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

#include "qsidebar_p.h"

#include "qfilesystemmodel.h"

#ifndef QT_NO_FILEDIALOG

#include <qaction.h>

#include <qurl.h>

#include <qmenu.h>

#include <qmimedata.h>

#include <qevent.h>

#include <qdebug.h>

#include <qfileiconprovider.h>

#include <qfiledialog.h>

QT_BEGIN_NAMESPACE

void QSideBarDelegate::initStyleOption(QStyleOptionViewItem *option,

                                         const QModelIndex &index) const

{

    QStyledItemDelegate::initStyleOption(option,index);

    QVariant value = index.data(QUrlModel::EnabledRole);

    if (value.isValid()) {

        //If the bookmark/entry is not enabled then we paint it in gray

        if (!qvariant_cast<bool>(value))

            option->state &= ~QStyle::State_Enabled;

    }

}

/*!

    QUrlModel lets you have indexes from a QFileSystemModel to a list.  When QFileSystemModel

    changes them QUrlModel will automatically update.

    Example usage: File dialog sidebar and combo box

 */

QUrlModel::QUrlModel(QObject *parent) : QStandardItemModel(parent), showFullPath(false), fileSystemModel(0)

{

}

/*!

    \reimp

*/

QStringList QUrlModel::mimeTypes() const

{

    return QStringList(QLatin1String("text/uri-list"));

}

/*!

    \reimp

*/

Qt::ItemFlags QUrlModel::flags(const QModelIndex &index) const

{

    Qt::ItemFlags flags = QStandardItemModel::flags(index);

    if (index.isValid()) {

        flags &= ~Qt::ItemIsEditable;

        // ### some future version could support "moving" urls onto a folder

        flags &= ~Qt::ItemIsDropEnabled;

    }

    if (index.data(Qt::DecorationRole).isNull())

        flags &= ~Qt::ItemIsEnabled;

    return flags;

}

/*!

    \reimp

*/

QMimeData *QUrlModel::mimeData(const QModelIndexList &indexes) const

{

    QList<QUrl> list;

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

        if (indexes.at(i).column() == 0)

           list.append(indexes.at(i).data(UrlRole).toUrl());

    }

    QMimeData *data = new QMimeData();

    data->setUrls(list);

    return data;

}

#ifndef QT_NO_DRAGANDDROP

/*!

    Decide based upon the data if it should be accepted or not

    We only accept dirs and not files

*/

bool QUrlModel::canDrop(QDragEnterEvent *event)

{

    if (!event->mimeData()->formats().contains(mimeTypes().first()))

        return false;

    const QList<QUrl> list = event->mimeData()->urls();

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

        QModelIndex idx = fileSystemModel->index(list.at(0).toLocalFile());

        if (!fileSystemModel->isDir(idx))

            return false;

    }

    return true;

}

/*!

    \reimp

*/

bool QUrlModel::dropMimeData(const QMimeData *data, Qt::DropAction action,

                                 int row, int column, const QModelIndex &parent)

{

    if (!data->formats().contains(mimeTypes().first()))

        return false;

    Q_UNUSED(action);

    Q_UNUSED(column);

    Q_UNUSED(parent);

    addUrls(data->urls(), row);

    return true;

}

#endif // QT_NO_DRAGANDDROP

/*!

    \reimp

    If the role is the UrlRole then handle otherwise just pass to QStandardItemModel

*/

bool QUrlModel::setData(const QModelIndex &index, const QVariant &value, int role)

{

    if (value.type() == QVariant::Url) {

        QUrl url = value.toUrl();

        QModelIndex dirIndex = fileSystemModel->index(url.toLocalFile());

        //On windows the popup display the "C:\", convert to nativeSeparators

        if (showFullPath)

            QStandardItemModel::setData(index, QDir::toNativeSeparators(fileSystemModel->data(dirIndex, QFileSystemModel::FilePathRole).toString()));

        else {

            QStandardItemModel::setData(index, QDir::toNativeSeparators(fileSystemModel->data(dirIndex, QFileSystemModel::FilePathRole).toString()), Qt::ToolTipRole);

            QStandardItemModel::setData(index, fileSystemModel->data(dirIndex).toString());

        }

        QStandardItemModel::setData(index, fileSystemModel->data(dirIndex, Qt::DecorationRole),

                                               Qt::DecorationRole);

        QStandardItemModel::setData(index, url, UrlRole);

        return true;

    }

    return QStandardItemModel::setData(index, value, role);

}

void QUrlModel::setUrl(const QModelIndex &index, const QUrl &url, const QModelIndex &dirIndex)

{

    setData(index, url, UrlRole);

    if (url.path().isEmpty()) {

        setData(index, fileSystemModel->myComputer());

        setData(index, fileSystemModel->myComputer(Qt::DecorationRole), Qt::DecorationRole);

    } else {

        QString newName;

        if (showFullPath) {

            //On windows the popup display the "C:\", convert to nativeSeparators

            newName = QDir::toNativeSeparators(dirIndex.data(QFileSystemModel::FilePathRole).toString());

        } else {

            newName = dirIndex.data().toString();

        }

        QIcon newIcon = qvariant_cast<QIcon>(dirIndex.data(Qt::DecorationRole));

        if (!dirIndex.isValid()) {

            newIcon = fileSystemModel->iconProvider()->icon(QFileIconProvider::Folder);

            newName = QFileInfo(url.toLocalFile()).fileName();

            if (!invalidUrls.contains(url))

                invalidUrls.append(url);

            //The bookmark is invalid then we set to false the EnabledRole

            setData(index, false, EnabledRole);

        } else {

            //The bookmark is valid then we set to true the EnabledRole

            setData(index, true, EnabledRole);

        }

        // Make sure that we have at least 32x32 images

        const QSize size = newIcon.actualSize(QSize(32,32));

        if (size.width() < 32) {

            QPixmap smallPixmap = newIcon.pixmap(QSize(32, 32));

            newIcon.addPixmap(smallPixmap.scaledToWidth(32, Qt::SmoothTransformation));

        }

        if (index.data().toString() != newName)

            setData(index, newName);

        QIcon oldIcon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));

        if (oldIcon.cacheKey() != newIcon.cacheKey())

            setData(index, newIcon, Qt::DecorationRole);

    }

}

void QUrlModel::setUrls(const QList<QUrl> &list)

{

    removeRows(0, rowCount());

    invalidUrls.clear();

    watching.clear();

    addUrls(list, 0);

}

/*!

    Add urls \a list into the list at \a row.  If move then movie

    existing ones to row.

    \sa dropMimeData()

*/

void QUrlModel::addUrls(const QList<QUrl> &list, int row, bool move)

{

    if (row == -1)

        row = rowCount();

    row = qMin(row, rowCount());

    for (int i = list.count() - 1; i >= 0; --i) {

        QUrl url = list.at(i);

        if (!url.isValid() || url.scheme() != QLatin1String("file"))

            continue;

        //this makes sure the url is clean

        const QString cleanUrl = QDir::cleanPath(url.toLocalFile());

        url = QUrl::fromLocalFile(cleanUrl);

        for (int j = 0; move && j < rowCount(); ++j) {

            QString local = index(j, 0).data(UrlRole).toUrl().toLocalFile();

#if defined(Q_OS_WIN)

            if (index(j, 0).data(UrlRole).toUrl().toLocalFile().toLower() == cleanUrl.toLower()) {

#else

            if (index(j, 0).data(UrlRole).toUrl().toLocalFile() == cleanUrl) {

#endif

                removeRow(j);

                if (j <= row)

                    row--;

                break;

            }

        }

        row = qMax(row, 0);

        QModelIndex idx = fileSystemModel->index(cleanUrl);

        if (!fileSystemModel->isDir(idx))

            continue;

        insertRows(row, 1);

        setUrl(index(row, 0), url, idx);

        watching.append(qMakePair(idx, cleanUrl));

    }

}

/*!

    Return the complete list of urls in a QList.

*/

QList<QUrl> QUrlModel::urls() const

{

    QList<QUrl> list;

    for (int i = 0; i < rowCount(); ++i)

        list.append(data(index(i, 0), UrlRole).toUrl());

    return list;

}

/*!

    QFileSystemModel to get index's from, clears existing rows

*/

void QUrlModel::setFileSystemModel(QFileSystemModel *model)

{

    if (model == fileSystemModel)

        return;

    if (fileSystemModel != 0) {

        disconnect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),

            this, SLOT(dataChanged(QModelIndex,QModelIndex)));

        disconnect(model, SIGNAL(layoutChanged()),

            this, SLOT(layoutChanged()));

        disconnect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),

            this, SLOT(layoutChanged()));

    }

    fileSystemModel = model;

    if (fileSystemModel != 0) {

        connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),

            this, SLOT(dataChanged(QModelIndex,QModelIndex)));

        connect(model, SIGNAL(layoutChanged()),

            this, SLOT(layoutChanged()));

        connect(model, SIGNAL(rowsRemoved(QModelIndex,int,int)),

            this, SLOT(layoutChanged()));

    }

    clear();

    insertColumns(0, 1);

}

/*

    If one of the index's we are watching has changed update our internal data

*/

void QUrlModel::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)

{

    QModelIndex parent = topLeft.parent();

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

        QModelIndex index = watching.at(i).first;

        if (index.model() && topLeft.model()) {

            Q_ASSERT(index.model() == topLeft.model());

        }

        if (   index.row() >= topLeft.row()

            && index.row() <= bottomRight.row()

            && index.column() >= topLeft.column()

            && index.column() <= bottomRight.column()

            && index.parent() == parent) {

                changed(watching.at(i).second);

        }

    }

}

/*!

    Re-get all of our data, anything could have changed!

 */

void QUrlModel::layoutChanged()

{

    QStringList paths;

    for (int i = 0; i < watching.count(); ++i)

        paths.append(watching.at(i).second);

    watching.clear();

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

        QString path = paths.at(i);

        QModelIndex newIndex = fileSystemModel->index(path);

        watching.append(QPair<QModelIndex, QString>(newIndex, path));

        if (newIndex.isValid())

            changed(path);

     }

}

/*!

    The following path changed data update our copy of that data

    \sa layoutChanged() dataChanged()

*/

void QUrlModel::changed(const QString &path)

{

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

        QModelIndex idx = index(i, 0);

        if (idx.data(UrlRole).toUrl().toLocalFile() == path) {

            setData(idx, idx.data(UrlRole).toUrl());

        }

    }

}

QSidebar::QSidebar(QWidget *parent) : QListView(parent)

{

}

void QSidebar::init(QFileSystemModel *model, const QList<QUrl> &newUrls)

{

    // ### TODO make icon size dynamic

    setIconSize(QSize(24,24));

    setUniformItemSizes(true);

    urlModel = new QUrlModel(this);

    urlModel->setFileSystemModel(model);

    setModel(urlModel);

    setItemDelegate(new QSideBarDelegate(this));

    connect(selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)),

            this, SLOT(clicked(QModelIndex)));

#ifndef QT_NO_DRAGANDDROP

    setDragDropMode(QAbstractItemView::DragDrop);

#endif

    setContextMenuPolicy(Qt::CustomContextMenu);

    connect(this, SIGNAL(customContextMenuRequested(QPoint)),

            this, SLOT(showContextMenu(QPoint)));

    urlModel->setUrls(newUrls);

    setCurrentIndex(this->model()->index(0,0));

}

QSidebar::~QSidebar()

{

}

#ifndef QT_NO_DRAGANDDROP

void QSidebar::dragEnterEvent(QDragEnterEvent *event)

{

    if (urlModel->canDrop(event))

        QListView::dragEnterEvent(event);

}

#endif // QT_NO_DRAGANDDROP

QSize QSidebar::sizeHint() const

{

    if (model())

        return QListView::sizeHintForIndex(model()->index(0, 0)) + QSize(2 * frameWidth(), 2 * frameWidth());

    return QListView::sizeHint();

}

void QSidebar::selectUrl(const QUrl &url)

{

    disconnect(selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)),

               this, SLOT(clicked(QModelIndex)));

    selectionModel()->clear();

    for (int i = 0; i < model()->rowCount(); ++i) {

        if (model()->index(i, 0).data(QUrlModel::UrlRole).toUrl() == url) {

            selectionModel()->select(model()->index(i, 0), QItemSelectionModel::Select);

            break;

        }

    }

    connect(selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)),

            this, SLOT(clicked(QModelIndex)));

}

#ifndef QT_NO_MENU

/*!

    \internal

    \sa removeEntry()

*/

void QSidebar::showContextMenu(const QPoint &position)

{

    QList<QAction *> actions;

    if (indexAt(position).isValid()) {

        QAction *action = new QAction(QFileDialog::tr("Remove"), this);

        if (indexAt(position).data(QUrlModel::UrlRole).toUrl().path().isEmpty())

            action->setEnabled(false);

        connect(action, SIGNAL(triggered()), this, SLOT(removeEntry()));

        actions.append(action);

    }

    if (actions.count() > 0)

        QMenu::exec(actions, mapToGlobal(position));

}

#endif // QT_NO_MENU

/*!

    \internal

    \sa showContextMenu()

*/

void QSidebar::removeEntry()

{

    QList<QModelIndex> idxs = selectionModel()->selectedIndexes();

    QList<QPersistentModelIndex> indexes;

    for (int i = 0; i < idxs.count(); i++)

        indexes.append(idxs.at(i));

    for (int i = 0; i < indexes.count(); ++i)

        if (!indexes.at(i).data(QUrlModel::UrlRole).toUrl().path().isEmpty())

            model()->removeRow(indexes.at(i).row());

}

/*!

    \internal

    \sa goToUrl()

*/

void QSidebar::clicked(const QModelIndex &index)

{

    QUrl url = model()->index(index.row(), 0).data(QUrlModel::UrlRole).toUrl();

    emit goToUrl(url);

    selectUrl(url);

}

/*!

    \reimp

    Don't automatically select something

 */

void QSidebar::focusInEvent(QFocusEvent *event)

{

    QAbstractScrollArea::focusInEvent(event);

    viewport()->update();

}

/*!

    \reimp

 */

bool QSidebar::event(QEvent * event)

{

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

        QKeyEvent* ke = (QKeyEvent*) event;

        if (ke->key() == Qt::Key_Delete) {

            removeEntry();

            return true;

        }

    }

    return QListView::event(event);

}

QT_END_NAMESPACE

#endif