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

**

** All rights reserved.

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

**

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

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** 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

** Alternatively, this file may be used under the terms of the GNU Lesser

** 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

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

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

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include "q3stylesheet.h"

#ifndef QT_NO_RICHTEXT

#include "qlayout.h"

#include "qpainter.h"

#include "q3cleanuphandler.h"

#include <qtextdocument.h>

#include <stdio.h>

QT_BEGIN_NAMESPACE

class Q3StyleSheetItemData

{

public:

    Q3StyleSheetItem::DisplayMode disp;

    int fontitalic;

    int fontunderline;

    int fontstrikeout;

    int fontweight;

    int fontsize;

    int fontsizelog;

    int fontsizestep;

    int lineSpacing;

    QString fontfamily;

    Q3StyleSheetItem *parentstyle;

    QString stylename;

    int ncolumns;

    QColor col;

    bool anchor;

    int align;

    Q3StyleSheetItem::VerticalAlignment valign;

    int margin[5];

    Q3StyleSheetItem::ListStyle list;

    Q3StyleSheetItem::WhiteSpaceMode whitespacemode;

    QString contxt;

    bool selfnest;

    Q3StyleSheet* sheet;

};

/*!

    \class Q3StyleSheetItem

    \brief The Q3StyleSheetItem class provides an encapsulation of a set of text styles.

    \compat

    A style sheet item consists of a name and a set of attributes that

    specify its font, color, etc. When used in a \link Q3StyleSheet

    style sheet\endlink (see styleSheet()), items define the name() of

    a rich text tag and the display property changes associated with

    it.

    The \link Q3StyleSheetItem::DisplayMode display mode\endlink

    attribute indicates whether the item is a block, an inline element

    or a list element; see setDisplayMode(). The treatment of

    whitespace is controlled by the \link

    Q3StyleSheetItem::WhiteSpaceMode white space mode\endlink; see

    setWhiteSpaceMode(). An item's margins are set with setMargin(),

    In the case of list items, the list style is set with

    setListStyle(). An item may be a hypertext link anchor; see

    setAnchor(). Other attributes are set with setAlignment(),

    setVerticalAlignment(), setFontFamily(), setFontSize(),

    setFontWeight(), setFontItalic(), setFontUnderline(),

    setFontStrikeOut and setColor().

*/

/*! \enum Q3StyleSheetItem::AdditionalStyleValues

    \internal

*/

/*!

    \enum Q3StyleSheetItem::WhiteSpaceMode

    This enum defines the ways in which Q3StyleSheet can treat

    whitespace.

    \value WhiteSpaceNormal  any sequence of whitespace (including

        line-breaks) is equivalent to a single space.

    \value WhiteSpacePre  whitespace must be output exactly as given

        in the input.

    \value WhiteSpaceNoWrap  multiple spaces are collapsed as with

        WhiteSpaceNormal, but no automatic line-breaks occur. To break

        lines manually, use the \c{<br>} tag.

    \omitvalue WhiteSpaceModeUndefined

*/

/*!

    \enum Q3StyleSheetItem::Margin

    \value MarginLeft  left margin

    \value MarginRight  right margin

    \value MarginTop  top margin

    \value MarginBottom  bottom margin

    \value MarginAll  all margins (left, right, top and bottom)

    \value MarginVertical  top and bottom margins

    \value MarginHorizontal  left and right margins

    \value MarginFirstLine  margin (indentation) of the first line of

        a paragarph (in addition to the MarginLeft of the paragraph)

    \value MarginUndefined

*/

/*!

    Constructs a new style called \a name for the stylesheet \a

    parent.

    All properties in Q3StyleSheetItem are initially in the "do not

    change" state, except \link Q3StyleSheetItem::DisplayMode display

    mode\endlink, which defaults to \c DisplayInline.

*/

Q3StyleSheetItem::Q3StyleSheetItem(Q3StyleSheet* parent, const QString& name)

{

    d = new Q3StyleSheetItemData;

    d->stylename = name.toLower();

    d->sheet = parent;

    init();

    if (parent)

        parent->insert(this);

}

/*!

    Copy constructor. Constructs a copy of \a other that is not bound

    to any style sheet.

*/

Q3StyleSheetItem::Q3StyleSheetItem(const Q3StyleSheetItem & other)

{

    d = new Q3StyleSheetItemData;

    *d = *other.d;

}

/*!

    Destroys the style. Note that Q3StyleSheetItem objects become

    owned by Q3StyleSheet when they are created.

*/

Q3StyleSheetItem::~Q3StyleSheetItem()

{

    delete d;

}

/*!

  Assignment. Assings a copy of \a other that is not bound to any style sheet.

  Unbounds first from previous style sheet.

 */

Q3StyleSheetItem& Q3StyleSheetItem::operator=(const Q3StyleSheetItem& other)

{

    if (&other == this)

        return *this;

    delete d;

    d = new Q3StyleSheetItemData;

    *d = *other.d;

    return *this;

}

/*!

    Returns the style sheet this item is in.

*/

Q3StyleSheet* Q3StyleSheetItem::styleSheet()

{

    return d->sheet;

}

/*!

    \overload

    Returns the style sheet this item is in.

*/

const Q3StyleSheet* Q3StyleSheetItem::styleSheet() const

{

    return d->sheet;

}

/*!

  \internal

  Internal initialization

 */

void Q3StyleSheetItem::init()

{

    d->disp = DisplayInline;

    d->fontitalic = Undefined;

    d->fontunderline = Undefined;

    d->fontstrikeout = Undefined;

    d->fontweight = Undefined;

    d->fontsize = Undefined;

    d->fontsizelog = Undefined;

    d->fontsizestep = 0;

    d->ncolumns = Undefined;

    d->col = QColor(); // !isValid()

    d->anchor = false;

    d->align = Undefined;

    d->valign = VAlignBaseline;

    d->margin[0] = Undefined;

    d->margin[1] = Undefined;

    d->margin[2] = Undefined;

    d->margin[3] = Undefined;

    d->margin[4] = Undefined;

    d->list = ListStyleUndefined;

    d->whitespacemode = WhiteSpaceModeUndefined;

    d->selfnest = true;

    d->lineSpacing = Undefined;

}

/*!

    Returns the name of the style item.

*/

QString Q3StyleSheetItem::name() const

{

    return d->stylename;

}

/*!

    Returns the \link Q3StyleSheetItem::DisplayMode display

    mode\endlink of the style.

    \sa setDisplayMode()

*/

Q3StyleSheetItem::DisplayMode Q3StyleSheetItem::displayMode() const

{

    return d->disp;

}

/*!

    \enum Q3StyleSheetItem::DisplayMode

    This enum type defines the way adjacent elements are displayed.

    \value DisplayBlock  elements are displayed as a rectangular block

        (e.g. \c{<p>...</p>}).

    \value DisplayInline  elements are displayed in a horizontally

        flowing sequence (e.g. \c{<em>...</em>}).

    \value DisplayListItem  elements are displayed in a vertical

        sequence (e.g. \c{<li>...</li>}).

    \value DisplayNone  elements are not displayed at all.

    \omitvalue DisplayModeUndefined

*/

/*!

    Sets the display mode of the style to \a m.

    \sa displayMode()

 */

void Q3StyleSheetItem::setDisplayMode(DisplayMode m)

{

    d->disp=m;

}

/*!

    Returns the alignment of this style. Possible values are

    Qt::AlignAuto, Qt::AlignLeft, Qt::AlignRight, Qt::AlignCenter or

    Qt::AlignJustify.

    \sa setAlignment(), Qt::Alignment

*/

int Q3StyleSheetItem::alignment() const

{

    return d->align;

}

/*!

    Sets the alignment to \a f. This only makes sense for styles with

    a \link Q3StyleSheetItem::DisplayMode display mode\endlink of

    DisplayBlock. Possible values are Qt::AlignAuto, Qt::AlignLeft,

    Qt::AlignRight, Qt::AlignCenter or Qt::AlignJustify.

    \sa alignment(), displayMode(), Qt::Alignment

*/

void Q3StyleSheetItem::setAlignment(int f)

{

    d->align = f;

}

/*!

    Returns the vertical alignment of the style. Possible values are

    VAlignBaseline, VAlignSub or VAlignSuper.

    \sa setVerticalAlignment()

*/

Q3StyleSheetItem::VerticalAlignment Q3StyleSheetItem::verticalAlignment() const

{

    return d->valign;

}

/*!

    \enum Q3StyleSheetItem::VerticalAlignment

    This enum type defines the way elements are aligned vertically.

    This is only supported for text elements.

    \value VAlignBaseline align the baseline of the element (or the

        bottom, if the element doesn't have a baseline) with the

        baseline of the parent

    \value VAlignSub subscript the element

    \value VAlignSuper superscript the element

*/

/*!

    Sets the vertical alignment to \a valign. Possible values are

    VAlignBaseline, VAlignSub or VAlignSuper.

    The vertical alignment property is not inherited.

    \sa verticalAlignment()

*/

void Q3StyleSheetItem::setVerticalAlignment(VerticalAlignment valign)

{

    d->valign = valign;

}

/*!

    Returns true if the style sets an italic font; otherwise returns

    false.

    \sa setFontItalic(), definesFontItalic()

*/

bool Q3StyleSheetItem::fontItalic() const

{

    return d->fontitalic > 0;

}

/*!

    If \a italic is true sets italic for the style; otherwise sets

    upright.

    \sa fontItalic(), definesFontItalic()

*/

void Q3StyleSheetItem::setFontItalic(bool italic)

{

    d->fontitalic = italic?1:0;

}

/*!

    Returns true if the style defines a font shape; otherwise returns

    false. A style does not define any shape until setFontItalic() is

    called.

    \sa setFontItalic(), fontItalic()

*/

bool Q3StyleSheetItem::definesFontItalic() const

{

    return d->fontitalic != Undefined;

}

/*!

    Returns true if the style sets an underlined font; otherwise

    returns false.

    \sa setFontUnderline(), definesFontUnderline()

*/

bool Q3StyleSheetItem::fontUnderline() const

{

    return d->fontunderline > 0;

}

/*!

    If \a underline is true, sets underline for the style; otherwise

    sets no underline.

    \sa fontUnderline(), definesFontUnderline()

*/

void Q3StyleSheetItem::setFontUnderline(bool underline)

{

    d->fontunderline = underline?1:0;

}

/*!

    Returns true if the style defines a setting for the underline

    property of the font; otherwise returns false. A style does not

    define this until setFontUnderline() is called.

    \sa setFontUnderline(), fontUnderline()

*/

bool Q3StyleSheetItem::definesFontUnderline() const

{

    return d->fontunderline != Undefined;

}

/*!

    Returns true if the style sets a strike out font; otherwise

    returns false.

    \sa setFontStrikeOut(), definesFontStrikeOut()

*/

bool Q3StyleSheetItem::fontStrikeOut() const

{

    return d->fontstrikeout > 0;

}

/*!

    If \a strikeOut is true, sets strike out for the style; otherwise

    sets no strike out.

    \sa fontStrikeOut(), definesFontStrikeOut()

*/

void Q3StyleSheetItem::setFontStrikeOut(bool strikeOut)

{

    d->fontstrikeout = strikeOut?1:0;

}

/*!

    Returns true if the style defines a setting for the strikeOut

    property of the font; otherwise returns false. A style does not

    define this until setFontStrikeOut() is called.

    \sa setFontStrikeOut(), fontStrikeOut()

*/

bool Q3StyleSheetItem::definesFontStrikeOut() const

{

    return d->fontstrikeout != Undefined;

}

/*!

    Returns the font weight setting of the style. This is either a

    valid QFont::Weight or the value Q3StyleSheetItem::Undefined.

    \sa setFontWeight(), QFont

*/

int Q3StyleSheetItem::fontWeight() const

{

    return d->fontweight;

}

/*!

    Sets the font weight setting of the style to \a w. Valid values

    are those defined by QFont::Weight.

    \sa QFont, fontWeight()

*/

void Q3StyleSheetItem::setFontWeight(int w)

{

    d->fontweight = w;

}

/*!

    Returns the logical font size setting of the style. This is either

    a valid size between 1 and 7 or Q3StyleSheetItem::Undefined.

    \sa setLogicalFontSize(), setLogicalFontSizeStep(), QFont::pointSize(), QFont::setPointSize()

*/

int Q3StyleSheetItem::logicalFontSize() const

{

    return d->fontsizelog;

}

/*!

    Sets the logical font size setting of the style to \a s. Valid

    logical sizes are 1 to 7.

    \sa logicalFontSize(), QFont::pointSize(), QFont::setPointSize()

*/

void Q3StyleSheetItem::setLogicalFontSize(int s)

{

    d->fontsizelog = s;

}

/*!

    Returns the logical font size step of this style.

    The default is 0. Tags such as \c big define \c +1; \c small

    defines \c -1.

    \sa setLogicalFontSizeStep()

*/

int Q3StyleSheetItem::logicalFontSizeStep() const

{

    return d->fontsizestep;

}

/*!

    Sets the logical font size step of this style to \a s.