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

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the Qt3Support module of the Qt Toolkit.

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** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

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** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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

#include "qglobal.h"

#if defined(Q_CC_BOR)

// needed for qsort() because of a std namespace problem on Borland

#include "qplatformdefs.h"

#endif

#include "q3iconview.h"

#ifndef QT_NO_ICONVIEW

#include "private/q3richtext_p.h"

#include "q3textedit.h"

#include "qapplication.h"

#include "qbitmap.h"

#include "qbrush.h"

#include "q3cleanuphandler.h"

#include "qcursor.h"

#include "qevent.h"

#include "qfontmetrics.h"

#include "qhash.h"

#include "qimage.h"

#include "qmime.h"

#include "qpainter.h"

#include "qpalette.h"

#include "qpen.h"

#include "qpixmapcache.h"

#include "qstringlist.h"

#include "qstyle.h"

#include "qstyleoption.h"

#include "qtimer.h"

#include "qtooltip.h"

#include "q3strlist.h"

#include <limits.h>

#include <stdlib.h>

QT_BEGIN_NAMESPACE

#define RECT_EXTENSION 300

static const char * const unknown_xpm[] = {

    "32 32 11 1",

    "c c #ffffff",

    "g c #c0c0c0",

    "a c #c0ffc0",

    "h c #a0a0a4",

    "d c #585858",

    "f c #303030",

    "i c #400000",

    "b c #00c000",

    "e c #000000",

    "# c #000000",

    ". c None",

    "...###..........................",

    "...#aa##........................",

    ".###baaa##......................",

    ".#cde#baaa##....................",

    ".#cccdeebaaa##..##f.............",

    ".#cccccdeebaaa##aaa##...........",

    ".#cccccccdeebaaaaaaaa##.........",

    ".#cccccccccdeebaaaaaaa#.........",

    ".#cccccgcgghhebbbbaaaaa#........",

    ".#ccccccgcgggdebbbbbbaa#........",

    ".#cccgcgcgcgghdeebiebbba#.......",

    ".#ccccgcggggggghdeddeeba#.......",

    ".#cgcgcgcggggggggghghdebb#......",

    ".#ccgcggggggggghghghghd#b#......",

    ".#cgcgcggggggggghghghhd#b#......",

    ".#gcggggggggghghghhhhhd#b#......",

    ".#cgcggggggggghghghhhhd#b#......",

    ".#ggggggggghghghhhhhhhdib#......",

    ".#gggggggggghghghhhhhhd#b#......",

    ".#hhggggghghghhhhhhhhhd#b#......",

    ".#ddhhgggghghghhhhhhhhd#b#......",

    "..##ddhhghghhhhhhhhhhhdeb#......",

    "....##ddhhhghhhhhhhhhhd#b#......",

    "......##ddhhhhhhhhhhhhd#b#......",

    "........##ddhhhhhhhhhhd#b#......",

    "..........##ddhhhhhhhhd#b#......",

    "............##ddhhhhhhd#b###....",

    "..............##ddhhhhd#b#####..",

    "................##ddhhd#b######.",

    "..................##dddeb#####..",

    "....................##d#b###....",

    "......................####......"};

static QPixmap *unknown_icon = 0;

static QPixmap *qiv_buffer_pixmap = 0;

#if !defined(Q_WS_X11)

static QPixmap *qiv_selection = 0;

#endif

static bool optimize_layout = false;

static Q3CleanupHandler<QPixmap> qiv_cleanup_pixmap;

static QPixmap *get_qiv_buffer_pixmap(const QSize &s)

{

    if (!qiv_buffer_pixmap) {

        qiv_buffer_pixmap = new QPixmap(s);

        qiv_cleanup_pixmap.add(&qiv_buffer_pixmap);

        return qiv_buffer_pixmap;

    }

    qiv_buffer_pixmap->resize(s);

    return qiv_buffer_pixmap;

}

#ifndef QT_NO_DRAGANDDROP

class Q_COMPAT_EXPORT Q3IconDragData

{

public:

    Q3IconDragData();

    Q3IconDragData(const QRect &ir, const QRect &tr);

    QRect pixmapRect() const;

    QRect textRect() const;

    void setPixmapRect(const QRect &r);

    void setTextRect(const QRect &r);

    QRect iconRect_, textRect_;

    QString key_;

    bool operator==(const Q3IconDragData &i) const;

};

class Q_COMPAT_EXPORT Q3IconDragDataItem

{

public:

    Q3IconDragDataItem() {}

    Q3IconDragDataItem(const Q3IconDragItem &i1, const Q3IconDragData &i2) : data(i1), item(i2) {}

    Q3IconDragItem data;

    Q3IconDragData item;

    bool operator== (const Q3IconDragDataItem&) const;

};

class Q3IconDragPrivate

{

public:

    QLinkedList<Q3IconDragDataItem> items;

    static bool decode(QMimeSource* e, QLinkedList<Q3IconDragDataItem> &lst);

};

#endif

class Q3IconViewPrivate

{

public:

    Q3IconViewItem *firstItem, *lastItem;

    uint count;

    Q3IconView::SelectionMode selectionMode;

    Q3IconViewItem *currentItem, *tmpCurrentItem, *highlightedItem,

        *startDragItem, *pressedItem, *selectAnchor, *renamingItem;

    QRect *rubber;

    QTimer *scrollTimer, *adjustTimer, *updateTimer, *inputTimer,

        *fullRedrawTimer;

    int rastX, rastY, spacing;

    int dragItems;

    QPoint oldDragPos;

    Q3IconView::Arrangement arrangement;

    Q3IconView::ResizeMode resizeMode;

    QSize oldSize;

#ifndef QT_NO_DRAGANDDROP

    QLinkedList<Q3IconDragDataItem> iconDragData;

#endif

    int numDragItems, cachedW, cachedH;

    int maxItemWidth, maxItemTextLength;

    QPoint dragStart;

    QString currInputString;

    Q3IconView::ItemTextPos itemTextPos;

#ifndef QT_NO_CURSOR

    QCursor oldCursor;

#endif

    int cachedContentsX, cachedContentsY;

    QBrush itemTextBrush;

    QRegion clipRegion;

    QPoint dragStartPos;

    QFontMetrics *fm;

    int minLeftBearing, minRightBearing;

    uint mousePressed : 1;

    uint cleared : 1;

    uint dropped : 1;

    uint clearing : 1;

    uint oldDragAcceptAction : 1;

    uint isIconDrag : 1;

    uint drawDragShapes : 1;

    uint dirty : 1;

    uint rearrangeEnabled : 1;

    uint reorderItemsWhenInsert : 1;

    uint drawAllBack : 1;

    uint resortItemsWhenInsert : 1;

    uint sortDirection : 1;

    uint wordWrapIconText : 1;

    uint containerUpdateLocked : 1;

    uint firstSizeHint : 1;

    uint showTips : 1;

    uint pressedSelected : 1;

    uint dragging : 1;

    uint drawActiveSelection : 1;

    uint inMenuMode : 1;

    QPoint dragPos;

    QPixmapCache maskCache;

    QHash<Q3IconViewItem *, Q3IconViewItem *> selectedItems;

    struct ItemContainer {

        ItemContainer(ItemContainer *pr, ItemContainer *nx, const QRect &r)

            : p(pr), n(nx), rect(r)

        {

            if (p)

                p->n = this;

            if (n)

                n->p = this;

        }

        ItemContainer *p, *n;

        QRect rect;

        QList<Q3IconViewItem*> items;

    } *firstContainer, *lastContainer;

    struct SortableItem {

        Q3IconViewItem *item;

    };

public:

    /* finds the containers that intersect with \a searchRect in the direction \a dir relative to \a relativeTo */

    QList<ItemContainer* >* findContainers(

        Q3IconView:: Direction dir,

        const QPoint &relativeTo,

        const QRect &searchRect) const;

    //    friend int cmpIconViewItems(const void *n1, const void *n2);

};

QList<Q3IconViewPrivate::ItemContainer *>* Q3IconViewPrivate::findContainers(

        Q3IconView:: Direction dir,

        const QPoint &relativeTo,

        const QRect &searchRect) const

{

    QList<Q3IconViewPrivate::ItemContainer *>* list =

        new QList<Q3IconViewPrivate::ItemContainer*>();

    if (arrangement == Q3IconView::LeftToRight) {

        if (dir == Q3IconView::DirLeft || dir == Q3IconView::DirRight) {

            ItemContainer *c = firstContainer;

            for (; c; c = c->n)

                if (c->rect.intersects(searchRect))

                    list->append(c);

        } else {

            if (dir == Q3IconView::DirDown) {

                ItemContainer *c = firstContainer;

                for (; c; c = c->n)

                    if (c->rect.intersects(searchRect) &&

                         c->rect.bottom() >= relativeTo.y())

                        list->append(c);

            } else {

                ItemContainer *c = lastContainer;

                for (; c; c = c->p)

                    if (c->rect.intersects(searchRect) &&

                         c->rect.top() <= relativeTo.y())

                        list->append(c);

            }

        }

    } else {

        if (dir == Q3IconView::DirUp || dir == Q3IconView::DirDown) {

            ItemContainer *c = firstContainer;

            for (; c; c = c->n)

                if (c->rect.intersects(searchRect))

                    list->append(c);

        } else {

            if (dir == Q3IconView::DirRight) {

                ItemContainer *c = firstContainer;

                for (; c; c = c->n)

                    if (c->rect.intersects(searchRect) &&

                         c->rect.right() >= relativeTo.x())

                        list->append(c);

            } else {

                ItemContainer *c = lastContainer;

                for (; c; c = c->p)

                    if (c->rect.intersects(searchRect) &&

                         c->rect.left() <= relativeTo.x())

                        list->append(c);

            }

        }

    }

    return list;

}

#if defined(Q_C_CALLBACKS)

extern "C" {

#endif

#ifdef Q_OS_WINCE

static int _cdecl cmpIconViewItems(const void *n1, const void *n2)

#else

static int cmpIconViewItems(const void *n1, const void *n2)

#endif

{

    if (!n1 || !n2)

        return 0;

    Q3IconViewPrivate::SortableItem *i1 = (Q3IconViewPrivate::SortableItem *)n1;

    Q3IconViewPrivate::SortableItem *i2 = (Q3IconViewPrivate::SortableItem *)n2;

    return i1->item->compare(i2->item);

}

#if defined(Q_C_CALLBACKS)

}

#endif

class Q3IconViewItemPrivate

{

public:

    Q3IconViewPrivate::ItemContainer *container1, *container2;

};

#ifndef QT_NO_TEXTEDIT

class Q3IconViewItemLineEdit : public Q3TextEdit

{

    friend class Q3IconViewItem;

public:

    Q3IconViewItemLineEdit(const QString &text, QWidget *parent, Q3IconViewItem *theItem, const char* name=0);

protected:

    void keyPressEvent(QKeyEvent *e);

    void focusOutEvent(QFocusEvent *e);

protected:

    Q3IconViewItem *item;

    QString startText;

private:

    Q_DISABLE_COPY(Q3IconViewItemLineEdit)

};

Q3IconViewItemLineEdit::Q3IconViewItemLineEdit(const QString &text, QWidget *parent,

                                              Q3IconViewItem *theItem, const char *name)

    : Q3TextEdit(parent, name), item(theItem), startText(text)

{

    setFrameStyle(QFrame::Plain | QFrame::Box);

    setLineWidth(1);

    setHScrollBarMode(AlwaysOff);

    setVScrollBarMode(AlwaysOff);

    setWordWrap(WidgetWidth);

    setWrapColumnOrWidth(item->iconView()->maxItemWidth() -

                          (item->iconView()->itemTextPos() == Q3IconView::Bottom ?

                            0 : item->pixmapRect().width()));

    document()->formatter()->setAllowBreakInWords(true);

    resize(200, 200); // ### some size, there should be a forceReformat()

    setTextFormat(Qt::PlainText);

    setText(text);

    setAlignment(Qt::AlignCenter);

    resize(wrapColumnOrWidth() + 2, heightForWidth(wrapColumnOrWidth()) + 2);

}

void Q3IconViewItemLineEdit::keyPressEvent(QKeyEvent *e)

{

    if (e->key()  == Qt::Key_Escape) {

        item->Q3IconViewItem::setText(startText);

        item->cancelRenameItem();

    } else if (e->key() == Qt::Key_Enter ||

                e->key() == Qt::Key_Return) {

        item->renameItem();

    } else {

        Q3TextEdit::keyPressEvent(e);

        sync();

        resize(width(), document()->height() + 2);

    }

}

void Q3IconViewItemLineEdit::focusOutEvent(QFocusEvent *e)

{

    Q_UNUSED(e) // I need this to get rid of a Borland warning

    if (e->reason() != Qt::PopupFocusReason)

        item->cancelRenameItem();

}

#endif

#ifndef QT_NO_DRAGANDDROP

/*!

    \class Q3IconDragItem

    \brief The Q3IconDragItem class encapsulates a drag item.

    \compat

    The Q3IconDrag class uses a list of Q3IconDragItems to support drag

    and drop operations.

    In practice a Q3IconDragItem object (or an object of a class derived

    from Q3IconDragItem) is created for each icon view item which is

    dragged. Each of these Q3IconDragItems is stored in a Q3IconDrag

    object.

    See Q3IconView::dragObject() for more information.

*/

/*!

    Constructs a Q3IconDragItem with no data.

*/

Q3IconDragItem::Q3IconDragItem()

{

    ba = "no data";

}

/*!

    Destructor.

*/

Q3IconDragItem::~Q3IconDragItem()

{

}

/*!

    Returns the data contained in the Q3IconDragItem.

*/

QByteArray Q3IconDragItem::data() const

{

    return ba;

}

/*!

    Sets the data for the Q3IconDragItem to the data stored in the

    QByteArray \a d.

*/

void Q3IconDragItem::setData(const QByteArray &d)

{

    ba = d;

}

/*!

    \internal

*/

bool Q3IconDragItem::operator==(const Q3IconDragItem &i) const

{

    return ba == i.ba;

}

/*!

    \reimp

*/

bool Q3IconDragDataItem::operator==(const Q3IconDragDataItem &i) const

{

    return (i.item == item &&

             i.data == data);

}

/*!

    \reimp

*/

bool Q3IconDragData::operator==(const Q3IconDragData &i) const

{

    return key_ == i.key_;

}

/*!

    \class Q3IconDrag

    \brief The Q3IconDrag class supports drag and drop operations

    within a Q3IconView.

    \compat

    A Q3IconDrag object is used to maintain information about the

    positions of dragged items and the data associated with them.

    Q3IconViews are able to use this information to paint the dragged

    items in the correct positions. Internally, Q3IconDrag stores the

    data associated with drag items in Q3IconDragItem objects.