render_list.cpp

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/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 * Copyright (C) 2003 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */

#include "render_list.h"
#include "rendering/render_canvas.h"

#include "xml/dom_docimpl.h"
#include "misc/htmltags.h"

#include <qpainter.h>

#include "misc/helper.h"

#include <kdebug.h>

//#define BOX_DEBUG

using DOM::DocumentImpl;
using namespace khtml;

const int cMarkerPadding = 7;

static QString toRoman( int number, bool upper )
{
    QString roman;
    QChar ldigits[] = { 'i', 'v', 'x', 'l', 'c', 'd', 'm' };
    QChar udigits[] = { 'I', 'V', 'X', 'L', 'C', 'D', 'M' };
    QChar *digits = upper ? udigits : ldigits;
    int i, d = 0;

    do
    {
        int num = number % 10;

        if ( num % 5 < 4 )
            for ( i = num % 5; i > 0; i-- )
                roman.insert( 0, digits[ d ] );

        if ( num >= 4 && num <= 8)
            roman.insert( 0, digits[ d+1 ] );

        if ( num == 9 )
            roman.insert( 0, digits[ d+2 ] );

        if ( num % 5 == 4 )
            roman.insert( 0, digits[ d ] );

        number /= 10;
        d += 2;
    }
    while ( number );

    return roman;
}

static QString toLetter( int number, int base ) {
    number--;
    QString letter = (QChar) (base + (number % 26));
    // Add a single quote at the end of the alphabet.
    for (int i = 0; i < (number / 26); i++) {
       letter += '\'';
    }
    return letter;
}

static QString toHebrew( int number ) {
    const QChar tenDigit[] = {1497, 1499, 1500, 1502, 1504, 1505, 1506, 1508, 1510};

    QString letter;
    if (number>999) {
  	letter = toHebrew(number/1000) + QString::fromLatin1("'");
   	number = number%1000;
    }

    int hunderts = (number/400);
    if (hunderts > 0) {
	for(int i=0; i<hunderts; i++) {
	    letter += QChar(1511 + 3);
	}
    }
    number = number % 400;
    if ((number / 100) != 0) {
        letter += QChar (1511 + (number / 100) -1);
    }
    number = number % 100;
    int tens = number/10;
    if (tens > 0 && !(number == 15 || number == 16)) {
	letter += tenDigit[tens-1];
    }
    if (number == 15 || number == 16) { // special because of religious
	letter += QChar(1487 + 9);       // reasons
    	letter += QChar(1487 + number - 9);
    } else {
        number = number % 10;
        if (number != 0) {
            letter += QChar (1487 + number);
        }
    }
    return letter;
}

// -------------------------------------------------------------------------

RenderListItem::RenderListItem(DOM::NodeImpl* node)
    : RenderBlock(node), _notInList(false)
{
    // init RenderObject attributes
    setInline(false);   // our object is not Inline

    predefVal = -1;
    m_marker = 0;
}

void RenderListItem::setStyle(RenderStyle *_style)
{
    RenderBlock::setStyle(_style);

    if (style()->listStyleType() != LNONE ||
        (style()->listStyleImage() && !style()->listStyleImage()->isErrorImage())) {
        RenderStyle *newStyle = new (renderArena()) RenderStyle();
        newStyle->ref();
        // The marker always inherits from the list item, regardless of where it might end
        // up (e.g., in some deeply nested line box).  See CSS3 spec.
        newStyle->inheritFrom(style());
        if (!m_marker) {
            m_marker = new (renderArena()) RenderListMarker(document());
            m_marker->setStyle(newStyle);
            m_marker->setListItem(this);
        }
        else
            m_marker->setStyle(newStyle);
        newStyle->deref(renderArena());
    } else if (m_marker) {
        m_marker->detach();
        m_marker = 0;
    }
}

RenderListItem::~RenderListItem()
{
}

void RenderListItem::detach()
{
    if (m_marker) {
        m_marker->detach();
        m_marker = 0;
    }
    RenderBlock::detach();
}

void RenderListItem::calcListValue()
{
    // only called from the marker so..
    KHTMLAssert(m_marker);

    if(predefVal != -1)
        m_marker->m_value = predefVal;
    else if(!previousSibling())
        m_marker->m_value = 1;
    else {
	RenderObject *o = previousSibling();
	while ( o && (!o->isListItem() || o->style()->listStyleType() == LNONE) )
	    o = o->previousSibling();
        if( o && o->isListItem() && o->style()->listStyleType() != LNONE ) {
            RenderListItem *item = static_cast<RenderListItem *>(o);
            m_marker->m_value = item->value() + 1;
        }
        else
            m_marker->m_value = 1;
    }
}

static RenderObject* getParentOfFirstLineBox(RenderObject* curr, RenderObject* marker)
{
    RenderObject* firstChild = curr->firstChild();
    if (!firstChild)
        return 0;

    for (RenderObject* currChild = firstChild;
         currChild; currChild = currChild->nextSibling()) {
        if (currChild == marker)
            continue;

        if (currChild->isInline())
            return curr;

        if (currChild->isFloating() || currChild->isPositioned())
            continue;

        if (currChild->isTable() || !currChild->isRenderBlock())
            break;

        if (currChild->style()->htmlHacks() && currChild->element() &&
            (currChild->element()->id() == ID_UL || currChild->element()->id() == ID_OL))
            break;

        RenderObject* lineBox = getParentOfFirstLineBox(currChild, marker);
        if (lineBox)
            return lineBox;
    }

    return 0;
}

void RenderListItem::updateMarkerLocation()
{
    // Sanity check the location of our marker.
    if (m_marker) {
        RenderObject* markerPar = m_marker->parent();
        RenderObject* lineBoxParent = getParentOfFirstLineBox(this, m_marker);
        if (!lineBoxParent) {
            // If the marker is currently contained inside an anonymous box,
            // then we are the only item in that anonymous box (since no line box
            // parent was found).  It's ok to just leave the marker where it is
            // in this case.
            if (markerPar && markerPar->isAnonymousBlock())
                lineBoxParent = markerPar;
            else
                lineBoxParent = this;
        }
        if (markerPar != lineBoxParent)
        {
            if (markerPar)
                markerPar->removeChild(m_marker);
            if (!lineBoxParent)
                lineBoxParent = this;
            lineBoxParent->addChild(m_marker, lineBoxParent->firstChild());
            if (!m_marker->minMaxKnown())
                m_marker->calcMinMaxWidth();
            recalcMinMaxWidths();
        }
    }
}

void RenderListItem::calcMinMaxWidth()
{
    // Make sure our marker is in the correct location.
    updateMarkerLocation();
    if (!minMaxKnown())
        RenderBlock::calcMinMaxWidth();
}

void RenderListItem::layout( )
{
    KHTMLAssert( needsLayout() );
    KHTMLAssert( minMaxKnown() );

    updateMarkerLocation();
    RenderBlock::layout();
    if (m_marker && !m_marker->isInside()) {
        // This can be a sloppy and imprecise offset as long as it's always too big.
        int offset;
        bool haveImage = m_marker->listImage() && !m_marker->listImage()->isErrorImage();
        if (haveImage)
            offset = m_marker->listImage()->pixmap().width();
        else
            {
            int pixHeight = style()->htmlFont().getFontDef().computedPixelSize();
            offset = pixHeight*2/3*kMax((int)m_marker->text().length()+1,1);
            }
        if (style()->direction() == LTR)
            m_overflowLeft = kMin(m_overflowLeft, -cMarkerPadding-offset);
        m_overflowWidth = kMax(m_overflowWidth, m_width+cMarkerPadding+offset);
    }
}

void RenderListItem::paint(PaintInfo& i, int _tx, int _ty)
{
    if (!m_height)
        return;

#ifdef DEBUG_LAYOUT
    kdDebug( 6040 ) << nodeName().string() << "(LI)::paint()" << endl;
#endif
    RenderBlock::paint(i, _tx, _ty);
}

QRect RenderListItem::getAbsoluteRepaintRect()
{
    QRect result = RenderBlock::getAbsoluteRepaintRect();
    if (m_marker && !m_marker->isInside()) {
        // This can be a sloppy and imprecise offset as long as it's always too big.
        int pixHeight = style()->htmlFont().getFontDef().computedPixelSize();
        int offset = pixHeight*2/3;
        bool haveImage = m_marker->listImage() && !m_marker->listImage()->isErrorImage();
        if (haveImage)
            offset = m_marker->listImage()->pixmap().width();
        int bulletWidth = offset/2;
        if (offset%2)
            bulletWidth++;
        int xoff = 0;
        if (style()->direction() == LTR)
            xoff = -cMarkerPadding - offset;
        else
            xoff = cMarkerPadding + (haveImage ? 0 : (offset - bulletWidth));

        if (xoff < 0) {
            result.setX(result.x() + xoff);
            result.setWidth(result.width() - xoff);
        }
        else
            result.setWidth(result.width() + xoff);
    }
    return result;
}

// -----------------------------------------------------------