Minor code shuffle.

[lyx.git] / src / text.C

/* This file is part of
 * ====================================================== 
 * 
 *           LyX, The Document Processor
 *       
 *           Copyright 1995 Matthias Ettrich
 *           Copyright 1995-2001 The LyX Team.
 *
 * ====================================================== */

#include <config.h>
#include <cstdlib>
#include <cctype>
#include <algorithm>

#include "lyxtext.h"
#include "layout.h"
#include "paragraph.h"
#include "support/textutils.h"
#include "insets/insetbib.h"
#include "insets/insettext.h"
#include "lyx_gui_misc.h"
#include "gettext.h"
#include "bufferparams.h"
#include "buffer.h"
#include "debug.h"
#include "lyxrc.h"
#include "LyXView.h"
#include "Painter.h"
#include "tracer.h"
#include "font.h"
#include "encoding.h"
#include "lyxscreen.h"
#include "bufferview_funcs.h"
#include "BufferView.h"
#include "language.h"
#include "ParagraphParameters.h"
#include "undo_funcs.h"

using std::max;
using std::min;
using std::endl;
using std::pair;

namespace {

int const LYX_PAPER_MARGIN = 20;

} // namespace anon

extern int bibitemMaxWidth(BufferView *, LyXFont const &);


int LyXText::workWidth(BufferView * bview) const
{
        if (inset_owner) {
                return inset_owner->textWidth(bview);
        }
        return bview->workWidth();
}


int LyXText::getRealCursorX(BufferView * bview) const
{
        int x = cursor.x();
        if (the_locking_inset && (the_locking_inset->getLyXText(bview)!=this))
                x = the_locking_inset->getLyXText(bview)->getRealCursorX(bview);
        return x;
}


unsigned char LyXText::transformChar(unsigned char c, Paragraph * par,
                        Paragraph::size_type pos) const
{
        if (!Encodings::is_arabic(c))
                if (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 && isdigit(c))
                        return c + (0xb0 - '0');
                else
                        return c;

        unsigned char const prev_char = pos > 0 ? par->getChar(pos-1) : ' ';
        unsigned char next_char = ' ';

        for (Paragraph::size_type i = pos+1; i < par->size(); ++i)
                if (!Encodings::IsComposeChar_arabic(par->getChar(i))) {
                        next_char = par->getChar(i);
                        break;
                }

        if (Encodings::is_arabic(next_char)) {
                if (Encodings::is_arabic(prev_char))
                        return Encodings::TransformChar(c, Encodings::FORM_MEDIAL);
                else
                        return Encodings::TransformChar(c, Encodings::FORM_INITIAL);
        } else {
                if (Encodings::is_arabic(prev_char))
                        return Encodings::TransformChar(c, Encodings::FORM_FINAL);
                else
                        return Encodings::TransformChar(c, Encodings::FORM_ISOLATED);
        }
}

// This is the comments that some of the warnings below refers to.
// There are some issues in this file and I don't think they are
// really related to the FIX_DOUBLE_SPACE patch. I'd rather think that
// this is a problem that has been here almost from day one and that a
// larger userbase with differenct access patters triggers the bad
// behaviour. (segfaults.) What I think happen is: In several places
// we store the paragraph in the current cursor and then moves the
// cursor. This movement of the cursor will delete paragraph at the
// old position if it is now empty. This will make the temporary
// pointer to the old cursor paragraph invalid and dangerous to use.
// And is some cases this will trigger a segfault. I have marked some
// of the cases where this happens with a warning, but I am sure there
// are others in this file and in text2.C. There is also a note in
// Delete() that you should read. In Delete I store the paragraph->id
// instead of a pointer to the paragraph. I am pretty sure this faulty
// use of temporary pointers to paragraphs that might have gotten
// invalidated (through a cursor movement) before they are used, are
// the cause of the strange crashes we get reported often.
//
// It is very tiresom to change this code, especially when it is as
// hard to read as it is. Help to fix all the cases where this is done
// would be greately appreciated.
//
// Lgb

int LyXText::singleWidth(BufferView * bview, Paragraph * par,
                         Paragraph::size_type pos) const
{
        char const c = par->getChar(pos);
        return singleWidth(bview, par, pos, c);
}


int LyXText::singleWidth(BufferView * bview, Paragraph * par,
                         Paragraph::size_type pos, char c) const
{
        LyXFont const font = getFont(bview->buffer(), par, pos);

        // The most common case is handled first (Asger)
        if (IsPrintable(c)) {
                if (font.language()->RightToLeft()) {
                        if (font.language()->lang() == "arabic" &&
                            (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
                             lyxrc.font_norm_type == LyXRC::ISO_10646_1))
                                if (Encodings::IsComposeChar_arabic(c))
                                        return 0;
                                else
                                        c = transformChar(c, par, pos);
                        else if (font.language()->lang() == "hebrew" &&
                                 Encodings::IsComposeChar_hebrew(c))
                                return 0;
                }
                return lyxfont::width(c, font);

        } else if (IsHfillChar(c)) {
                return 3;       /* Because of the representation
                                 * as vertical lines */
        } else if (c == Paragraph::META_INSET) {
                Inset * tmpinset = par->getInset(pos);
                if (tmpinset) {
#if 0 // seems not to be needed, but ...
                        tmpinset->update(bview, font);
#endif
                        return tmpinset->width(bview, font);
                } else
                        return 0;

        } else if (IsSeparatorChar(c))
                c = ' ';
        else if (IsNewlineChar(c))
                c = 'n';
        return lyxfont::width(c, font);
}


// Returns the paragraph position of the last character in the specified row
Paragraph::size_type LyXText::rowLast(Row const * row) const
{
        if (row->next() == 0)
                return row->par()->size() - 1;
        else if (row->next()->par() != row->par()) 
                return row->par()->size() - 1;
        else 
                return row->next()->pos() - 1;
}


Paragraph::size_type LyXText::rowLastPrintable(Row const * row) const
{
        Paragraph::size_type const last = rowLast(row);
        if (last >= row->pos()
            && row->next()
            && row->next()->par() == row->par()
            && row->par()->isSeparator(last))
                return last - 1;
        else
                return last;
}


void LyXText::computeBidiTables(Buffer const * buf, Row * row) const
{
        bidi_same_direction = true;
        if (!lyxrc.rtl_support) {
                bidi_start = -1;
                return;
        }

        bidi_start = row->pos();
        bidi_end = rowLastPrintable(row);

        if (bidi_start > bidi_end) {
                bidi_start = -1;
                return;
        }

        if (bidi_end + 2 - bidi_start >
            static_cast<Paragraph::size_type>(log2vis_list.size())) {
                Paragraph::size_type new_size = 
                        (bidi_end + 2 - bidi_start < 500) ?
                        500 : 2 * (bidi_end + 2 - bidi_start);
                log2vis_list.resize(new_size);
                vis2log_list.resize(new_size);
                bidi_levels.resize(new_size);
        }

        vis2log_list[bidi_end + 1 - bidi_start] = -1;
        log2vis_list[bidi_end + 1 - bidi_start] = -1;

        Paragraph::size_type    stack[2];
        bool const rtl_par =
                row->par()->getParLanguage(buf->params)->RightToLeft();
        int level = 0;
        bool rtl = false;
        bool rtl0 = false;
        Paragraph::size_type const main_body =
                beginningOfMainBody(buf, row->par());

        for (Paragraph::size_type lpos = bidi_start;
             lpos <= bidi_end; ++lpos) {
                bool is_space = row->par()->isLineSeparator(lpos);
                Paragraph::size_type const pos =
                        (is_space && lpos + 1 <= bidi_end &&
                         !row->par()->isLineSeparator(lpos + 1) &&
                         !row->par()->isNewline(lpos + 1))
                        ? lpos + 1 : lpos;
                LyXFont font = row->par()->getFontSettings(buf->params, pos);
                if (pos != lpos && 0 < lpos && rtl0 && font.isRightToLeft() &&
                    font.number() == LyXFont::ON &&
                    row->par()->getFontSettings(buf->params, lpos-1).number()
                    == LyXFont::ON) {
                        font = row->par()->getFontSettings(buf->params, lpos);
                        is_space = false;
                }


                bool new_rtl = font.isVisibleRightToLeft();
                bool new_rtl0 = font.isRightToLeft();
                int new_level;

                if (lpos == main_body - 1
                    && row->pos() < main_body - 1
                    && is_space) {
                        new_level = (rtl_par) ? 1 : 0;
                        new_rtl = new_rtl0 = rtl_par;
                } else if (new_rtl0)
                        new_level = (new_rtl) ? 1 : 2;
                else
                        new_level = (rtl_par) ? 2 : 0;

                if (is_space && new_level >= level) {
                        new_level = level;
                        new_rtl = rtl;
                        new_rtl0 = rtl0;
                }

                int new_level2 = new_level;

                if (level == new_level && rtl0 != new_rtl0) {
                        --new_level2;
                        log2vis_list[lpos - bidi_start] = (rtl) ? 1 : -1;
                } else if (level < new_level) {
                        log2vis_list[lpos - bidi_start] =  (rtl) ? -1 : 1;
                        if (new_level > rtl_par)
                                bidi_same_direction = false;
                } else
                        log2vis_list[lpos - bidi_start] = (new_rtl) ? -1 : 1;
                rtl = new_rtl;
                rtl0 = new_rtl0;
                bidi_levels[lpos - bidi_start] = new_level;

                while (level > new_level2) {
                        Paragraph::size_type old_lpos =
                                stack[--level];
                        int delta = lpos - old_lpos - 1;
                        if (level % 2)
                                delta = -delta;
                        log2vis_list[lpos - bidi_start] += delta;
                        log2vis_list[old_lpos - bidi_start] += delta;
                }
                while (level < new_level)
                        stack[level++] = lpos;
        }

        while (level > 0) {
                Paragraph::size_type const old_lpos = stack[--level];
                int delta = bidi_end - old_lpos;
                if (level % 2)
                        delta = -delta;
                log2vis_list[old_lpos - bidi_start] += delta;
        }

        Paragraph::size_type vpos = bidi_start - 1;
        for (Paragraph::size_type lpos = bidi_start;
             lpos <= bidi_end; ++lpos) {
                vpos += log2vis_list[lpos - bidi_start];
                vis2log_list[vpos - bidi_start] = lpos;
                log2vis_list[lpos - bidi_start] = vpos;
        }
}


// This method requires a previous call to ComputeBidiTables()
bool LyXText::isBoundary(Buffer const * buf, Paragraph * par,
                         Paragraph::size_type pos) const
{
        if (!lyxrc.rtl_support || pos == 0)
                return false;

        if (!bidi_InRange(pos - 1)) {
                /// This can happen if pos is the first char of a row.
                /// Returning false in this case is incorrect!
                return false;
        }

        bool const rtl = bidi_level(pos - 1) % 2;
        bool const rtl2 = bidi_InRange(pos)
                ? bidi_level(pos) % 2
                : par->isRightToLeftPar(buf->params);
        return rtl != rtl2;
}


bool LyXText::isBoundary(Buffer const * buf, Paragraph * par,
                         Paragraph::size_type pos,
                         LyXFont const & font) const
{
        if (!lyxrc.rtl_support)
                return false;    // This is just for speedup

        bool const rtl = font.isVisibleRightToLeft();
        bool const rtl2 = bidi_InRange(pos)
                ? bidi_level(pos) % 2
                : par->isRightToLeftPar(buf->params);
        return rtl != rtl2;
}


void LyXText::draw(BufferView * bview, Row const * row,
                   Paragraph::size_type & vpos,
                   int offset, float & x, bool cleared)
{
        Painter & pain = bview->painter();
        
        Paragraph::size_type pos = vis2log(vpos);
        char c = row->par()->getChar(pos);
        float tmpx = x;

        if (IsNewlineChar(c)) {
                ++vpos;
                // Draw end-of-line marker
                LyXFont const font = getFont(bview->buffer(), row->par(), pos);
                int const wid = lyxfont::width('n', font);
                int const asc = lyxfont::maxAscent(font);
                int const y = offset + row->baseline();
                int xp[3];
                int yp[3];
                
                if (bidi_level(pos) % 2 == 0) {
                        xp[0] = int(x + wid * 0.375);
                        yp[0] = int(y - 0.875 * asc * 0.75);
                        
                        xp[1] = int(x);
                        yp[1] = int(y - 0.500 * asc * 0.75);
                        
                        xp[2] = int(x + wid * 0.375);
                        yp[2] = int(y - 0.125 * asc * 0.75);
                        
                        pain.lines(xp, yp, 3, LColor::eolmarker);
                        
                        xp[0] = int(x);
                        yp[0] = int(y - 0.500 * asc * 0.75);
                        
                        xp[1] = int(x + wid);
                        yp[1] = int(y - 0.500 * asc * 0.75);
                        
                        xp[2] = int(x + wid);
                        yp[2] = int(y - asc * 0.75);
                        
                        pain.lines(xp, yp, 3, LColor::eolmarker);
                } else {
                        xp[0] = int(x + wid * 0.625);
                        yp[0] = int(y - 0.875 * asc * 0.75);
                        
                        xp[1] = int(x + wid);
                        yp[1] = int(y - 0.500 * asc * 0.75);
                        
                        xp[2] = int(x + wid * 0.625);
                        yp[2] = int(y - 0.125 * asc * 0.75);
                        
                        pain.lines(xp, yp, 3, LColor::eolmarker);
                        
                        xp[0] = int(x + wid);
                        yp[0] = int(y - 0.500 * asc * 0.75);
                        
                        xp[1] = int(x);
                        yp[1] = int(y - 0.500 * asc * 0.75);
                        
                        xp[2] = int(x);
                        yp[2] = int(y - asc * 0.75);
                        
                        pain.lines(xp, yp, 3, LColor::eolmarker);
                }
                x += wid;
                return;
        }

        LyXFont font = getFont(bview->buffer(), row->par(), pos);
        LyXFont font2 = font;

        if (c == Paragraph::META_INSET) {
                Inset * tmpinset = row->par()->getInset(pos);
                if (tmpinset) {
                        tmpinset->update(bview, font, false);
                        tmpinset->draw(bview, font, offset+row->baseline(), x,
                                       cleared);
#ifdef SEEMS_TO_BE_NOT_NEEDED
                        if (status_ == CHANGED_IN_DRAW) {
                                UpdateInset(bview, tmpinset);
                                status(bview, CHANGED_IN_DRAW);
                        }
#endif
                }
                ++vpos;

                if (lyxrc.mark_foreign_language &&
                    font.language() != bview->buffer()->params.language) {
                        int const y = offset + row->height() - 1;
                        pain.line(int(tmpx), y, int(x), y,
                                  LColor::language);
                }

                return;
        }

        /* usual characters, no insets */

        // Collect character that we can draw in one command

        // This is dirty, but fast. Notice that it will never be too small.
        // For the record, I'll note that Microsoft Word has a limit
        // of 768 here. We have none :-) (Asger)
        // Ok. I am the first to admit that the use of std::string will be
        // a tiny bit slower than using a POD char array. However, I claim
        // that this slowdown is so small that it is close to inperceptive.
        // So IMHO we should go with the easier and clearer implementation.
        // And even if 1024 is a large number here it might overflow, string
        // will only overflow if the machine is out of memory...
        static string textstring;
        textstring = c;
        ++vpos;

        Paragraph::size_type const last = rowLastPrintable(row);

        if (font.language()->lang() == "hebrew") {
                if (Encodings::IsComposeChar_hebrew(c)) {
                        int const width = lyxfont::width(c, font2);
                        int dx = 0;
                        for (Paragraph::size_type i = pos-1; i >= 0; --i) {
                                c = row->par()->getChar(i);
                                if (!Encodings::IsComposeChar_hebrew(c)) {
                                        if (IsPrintableNonspace(c)) {
                                                int const width2 =
                                                        singleWidth(bview,
                                                                    row->par(),
                                                                    i, c);
                                                dx = (c == 'ø' || c == 'ã') // dalet / resh
                                                        ? width2 - width : (width2 - width) / 2;
                                        }
                                        break;
                                }
                        }
                        // Draw nikud
                        pain.text(int(x) + dx, offset + row->baseline(),
                                  textstring, font);
                } else {
                        while (vpos <= last &&
                               (pos = vis2log(vpos)) >= 0
                               && IsPrintableNonspace(c = row->par()->getChar(pos))
                               && !Encodings::IsComposeChar_hebrew(c)
                               && font2 == getFont(bview->buffer(), row->par(), pos)) {
                                textstring += c;
                                ++vpos;
                        }
                        // Draw text and set the new x position
                        pain.text(int(x), offset + row->baseline(),
                                  textstring, font);
                        x += lyxfont::width(textstring, font);
                }
        } else if (font.language()->lang() == "arabic" &&
                   (lyxrc.font_norm_type == LyXRC::ISO_8859_6_8 ||
                    lyxrc.font_norm_type == LyXRC::ISO_10646_1)) {
                if (Encodings::IsComposeChar_arabic(c)) {
                        c = transformChar(c, row->par(), pos);
                        textstring = c;
                        int const width = lyxfont::width(c, font2);
                        int dx = 0;
                        for (Paragraph::size_type i = pos-1; i >= 0; --i) {
                                c = row->par()->getChar(i);
                                if (!Encodings::IsComposeChar_arabic(c)) {
                                        if (IsPrintableNonspace(c)) {
                                                int const width2 =
                                                        singleWidth(bview,
                                                                    row->par(),
                                                                    i, c);
                                                dx = (width2 - width) / 2;
                                        }
                                        break;
                                }
                        }
                        // Draw nikud
                        pain.text(int(x) + dx, offset + row->baseline(), 
                                  textstring, font);
                } else {
                        textstring = transformChar(c, row->par(), pos);
                        while (vpos <= last &&
                               (pos = vis2log(vpos)) >= 0
                               && IsPrintableNonspace(c = row->par()->getChar(pos))
                               && !Encodings::IsComposeChar_arabic(c)
                               && font2 == getFont(bview->buffer(), row->par(), pos)) {
                                c = transformChar(c, row->par(), pos);
                                textstring += c;
                                ++vpos;
                        }
                        // Draw text and set the new x position
                        pain.text(int(x), offset + row->baseline(),
                                  textstring, font);
                        x += lyxfont::width(textstring, font);
                }
        } else {
                while (vpos <= last &&
                       (pos = vis2log(vpos)) >= 0
                       && IsPrintableNonspace(c = row->par()->getChar(pos))
                       && font2 == getFont(bview->buffer(), row->par(), pos)) {
                        textstring += c;
                        ++vpos;
                }
                // Draw text and set the new x position
                pain.text(int(x), offset + row->baseline(), textstring, font);
                x += lyxfont::width(textstring, font);
        }

        if (lyxrc.mark_foreign_language &&
            font.language() != bview->buffer()->params.language) {
                int const y = offset + row->height() - 1;
                pain.line(int(tmpx), y, int(x), y,
                          LColor::language);
        }

        // If we want ulem.sty support, drawing
        // routines should go here. (Asger)
        // Why shouldn't LyXFont::drawText handle it internally?
}


// Returns the left beginning of the text. 
// This information cannot be taken from the layouts-objekt, because in 
// LaTeX the beginning of the text fits in some cases (for example sections)
// exactly the label-width.
int LyXText::leftMargin(BufferView * bview, Row const * row) const
{
        LyXLayout const & layout =
                textclasslist.Style(bview->buffer()->params.textclass,
                                    row->par()->getLayout());
        
        string parindent = layout.parindent; 

        int x = LYX_PAPER_MARGIN;
        
        x += lyxfont::signedWidth(textclasslist
                                  .TextClass(bview->buffer()->params.textclass)
                                  .leftmargin(),
                                  textclasslist
                                  .TextClass(bview->buffer()->params.textclass)
                                  .defaultfont());

        // this is the way, LyX handles the LaTeX-Environments.
        // I have had this idea very late, so it seems to be a
        // later added hack and this is true
        if (!row->par()->getDepth()) {
                if (!row->par()->getLayout()) {
                        // find the previous same level paragraph
                        if (row->par()->previous()) {
                                Paragraph * newpar = row->par()
                                        ->depthHook(row->par()->getDepth());
                                if (newpar &&
                                    textclasslist.Style(bview->buffer()->params.textclass,
                                                        newpar->getLayout())
                                    .nextnoindent)
                                        parindent.erase();
                        }
                }
        } else {
                // find the next level paragraph
                
                Paragraph * newpar =
                        row->par()->outerHook();
                
                // make a corresponding row. Needed to call LeftMargin()
                
                // check wether it is a sufficent paragraph 
                if (newpar
                    && textclasslist
                        .Style(bview->buffer()->params.textclass, 
                               newpar->getLayout()).isEnvironment()) {
                        Row dummyrow;
                        dummyrow.par(newpar);
                        dummyrow.pos(newpar->size());
                        x = leftMargin(bview, &dummyrow);
                } else {
                        // this is no longer an error, because this function
                        // is used to clear impossible depths after changing
                        // a layout. Since there is always a redo,
                        // LeftMargin() is always called
                        row->par()->params().depth(0);
                }
                
                if (newpar && !row->par()->getLayout()) {
                        if (newpar->params().noindent())
                                parindent.erase();
                        else
                                parindent = textclasslist
                                        .Style(bview->buffer()->params.textclass, 
                                               newpar->getLayout()).parindent;
                }
                
        }
        
        LyXFont const labelfont = getFont(bview->buffer(), row->par(), -2);
        switch (layout.margintype) {
        case MARGIN_DYNAMIC:
                if (!layout.leftmargin.empty()) {
                        x += lyxfont::signedWidth(layout.leftmargin,
                                                  textclasslist
                                                  .TextClass(bview->buffer()->params.
                                                             textclass)
                                                  .defaultfont());
                }
                if (!row->par()->getLabelstring().empty()) {
                        x += lyxfont::signedWidth(layout.labelindent,
                                                  labelfont);
                        x += lyxfont::width(row->par()->getLabelstring(),
                                            labelfont);
                        x += lyxfont::width(layout.labelsep, labelfont);
                }
                break;
        case MARGIN_MANUAL:
                x += lyxfont::signedWidth(layout.labelindent, labelfont);
                if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
                        if (!row->par()->getLabelWidthString().empty()) {
                                x += lyxfont::width(row->par()->getLabelWidthString(),
                                               labelfont);
                                x += lyxfont::width(layout.labelsep, labelfont);
                        }
                }
                break;
        case MARGIN_STATIC:
                x += lyxfont::signedWidth(layout.leftmargin, textclasslist.TextClass(bview->buffer()->params.textclass).defaultfont()) * 4
                        / (row->par()->getDepth() + 4);
                break;
        case MARGIN_FIRST_DYNAMIC:
                if (layout.labeltype == LABEL_MANUAL) {
                        if (row->pos() >= beginningOfMainBody(bview->buffer(), row->par())) {
                                x += lyxfont::signedWidth(layout.leftmargin,
                                                          labelfont);
                        } else {
                                x += lyxfont::signedWidth(layout.labelindent,
                                                          labelfont);
                        }
                } else if (row->pos()
                           // Special case to fix problems with
                           // theorems (JMarc)
                           || (layout.labeltype == LABEL_STATIC
                               && layout.latextype == LATEX_ENVIRONMENT
                               && ! row->par()->isFirstInSequence())) {
                        x += lyxfont::signedWidth(layout.leftmargin,
                                                  labelfont);
                } else if (layout.labeltype != LABEL_TOP_ENVIRONMENT
                           && layout.labeltype != LABEL_BIBLIO
                           && layout.labeltype !=
                           LABEL_CENTERED_TOP_ENVIRONMENT) {
                        x += lyxfont::signedWidth(layout.labelindent,
                                                  labelfont);
                        x += lyxfont::width(layout.labelsep, labelfont);
                        x += lyxfont::width(row->par()->getLabelstring(),
                                            labelfont);
                } 
                break;
                
        case MARGIN_RIGHT_ADDRESS_BOX:
        {
                // ok, a terrible hack. The left margin depends on the widest
                // row in this paragraph. Do not care about footnotes, they
                // are *NOT* allowed in the LaTeX realisation of this layout.
                
                // find the first row of this paragraph
                Row const * tmprow = row;
                while (tmprow->previous()
                       && tmprow->previous()->par() == row->par())
                        tmprow = tmprow->previous();
                
                int minfill = tmprow->fill();
                while (tmprow->next() && tmprow->next()->par() == row->par()) {
                        tmprow = tmprow->next();
                        if (tmprow->fill() < minfill)
                                minfill = tmprow->fill();
                }
                
                x += lyxfont::signedWidth(layout.leftmargin,
                                          textclasslist
                                          .TextClass(bview->buffer()->params.textclass)
                                          .defaultfont());
                x += minfill;
        }
        break;
        }
        
        int align; // wrong type

        if (row->par()->params().align() == LYX_ALIGN_LAYOUT)
                align = layout.align;
        else
                align = row->par()->params().align();

        // set the correct parindent
        if (row->pos() == 0) {
                if ((layout.labeltype == LABEL_NO_LABEL 
                     || layout.labeltype == LABEL_TOP_ENVIRONMENT 
                     || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT
                     || (layout.labeltype == LABEL_STATIC
                         && layout.latextype == LATEX_ENVIRONMENT
                         && ! row->par()->isFirstInSequence()))
                    && align == LYX_ALIGN_BLOCK
                    && !row->par()->params().noindent()
                    && (row->par()->layout ||
                        bview->buffer()->params.paragraph_separation ==
                        BufferParams::PARSEP_INDENT))
                        x += lyxfont::signedWidth(parindent,
                                                  textclasslist
                                                  .TextClass(bview->buffer()->params
                                                             .textclass)
                                                  .defaultfont());
                else if (layout.labeltype == LABEL_BIBLIO) {
                        // ale970405 Right width for bibitems
                        x += bibitemMaxWidth(bview,textclasslist
                                             .TextClass(bview->buffer()->params
                                                        .textclass)
                                             .defaultfont());
                }
        }
        return x;
}


int LyXText::rightMargin(Buffer const * buf, Row const * row) const
{
        LyXLayout const & layout =
                textclasslist.Style(buf->params.textclass,
                                    row->par()->getLayout());
        
        int x = LYX_PAPER_MARGIN
                + lyxfont::signedWidth(textclasslist
                                       .TextClass(buf->params.textclass)
                                       .rightmargin(),
                                       textclasslist
                                       .TextClass(buf->params.textclass)
                                       .defaultfont());

        // this is the way, LyX handles the LaTeX-Environments.
        // I have had this idea very late, so it seems to be a
        // later added hack and this is true
        if (row->par()->getDepth()) {
                // find the next level paragraph
                
                Paragraph * newpar = row->par();
                
                do {
                        newpar = newpar->previous();
                } while (newpar
                         && newpar->getDepth() >= row->par()->getDepth());
                
                // make a corresponding row. Needed to call LeftMargin()
                
                // check wether it is a sufficent paragraph
                if (newpar
                    && textclasslist.Style(buf->params.textclass,
                                           newpar->getLayout())
                       .isEnvironment()) {
                        Row dummyrow;
                        dummyrow.par(newpar);
                        dummyrow.pos(0);
                        x = rightMargin(buf, &dummyrow);
                } else {
                        // this is no longer an error, because this function
                        // is used to clear impossible depths after changing
                        // a layout. Since there is always a redo,
                        // LeftMargin() is always called
                        row->par()->params().depth(0);
                }
        }
        
        //lyxerr << "rightmargin: " << layout->rightmargin << endl;
        x += lyxfont::signedWidth(layout.rightmargin, textclasslist
                                  .TextClass(buf->params.textclass)
                                  .defaultfont()) * 4 / (row->par()->getDepth()
                                                         + 4);
        return x;
}


int LyXText::labelEnd(BufferView * bview, Row const * row) const
{
        if (textclasslist.Style(bview->buffer()->params.textclass,
                                row->par()->getLayout()).margintype
            == MARGIN_MANUAL) {
                Row tmprow;
                tmprow = *row;
                tmprow.pos(row->par()->size());
                return leftMargin(bview, &tmprow);  /* just the beginning 
                                                of the main body */
        } else
                return 0;  /* LabelEnd is only needed, if the  
                              layout fills a flushleft
                              label. */
}


// get the next breakpoint in a given paragraph
Paragraph::size_type
LyXText::nextBreakPoint(BufferView * bview, Row const * row, int width) const
{
        Paragraph * par = row->par();

        if (width < 0)
                return par->size();

        Paragraph::size_type const pos = row->pos();


        // position of the last possible breakpoint 
        // -1 isn't a suitable value, but a flag
        Paragraph::size_type last_separator = -1;
        width -= rightMargin(bview->buffer(), row);
        
        Paragraph::size_type const main_body =
                beginningOfMainBody(bview->buffer(), par);
        LyXLayout const & layout =
                textclasslist.Style(bview->buffer()->params.textclass, par->getLayout());
        Paragraph::size_type i = pos;

        if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
                /* special code for right address boxes, only newlines count */
                while (i < par->size()) {
                        if (par->isNewline(i)) {
                                last_separator = i;
                                i = par->size() - 1; // this means break
                                //x = width;
                        } else if (par->getChar(i) == Paragraph::META_INSET &&
                                   par->getInset(i) && par->getInset(i)->display()){
                                par->getInset(i)->display(false);
                        }
                        ++i;
                }
        } else {
                // Last position is an invariant
                Paragraph::size_type const last = 
                        par->size();
                // this is the usual handling
                int x = leftMargin(bview, row);
                bool doitonetime = true;
                while (doitonetime || ((x < width) && (i < last))) {
                        doitonetime = false;
                        char const c = par->getChar(i);
                        if (IsNewlineChar(c)) {
                                last_separator = i;
                                x = width; // this means break
                        } else if (c == Paragraph::META_INSET &&
                                   par->getInset(i)) {
                                
                                // check wether a Display() inset is
                                // valid here. if not, change it to
                                // non-display
                                if (par->getInset(i)->display() &&
                                    (layout.isCommand() ||
                                     (layout.labeltype == LABEL_MANUAL
                                      && i < beginningOfMainBody(bview->buffer(), par)))) {
                                        // display istn't allowd
                                        par->getInset(i)->display(false);
                                        x += singleWidth(bview, par, i, c);
                                } else if (par->getInset(i)->display() ||
                                         par->getInset(i)->needFullRow()) {
                                        // So break the line here
                                        if (i == pos) {
                                                if (pos < last-1) {
                                                        last_separator = i;
                                                        if (IsLineSeparatorChar(par->getChar(i+1)))
                                                                ++last_separator;
                                                } else
                                                        last_separator = last; // to avoid extra rows
                                        } else
                                                last_separator = i - 1;
                                        x = width;  // this means break
                                } else {
                                        x += singleWidth(bview, par, i, c);
                                }
                        } else  {
                                if (IsLineSeparatorChar(c))
                                        last_separator = i;
                                x += singleWidth(bview, par, i, c);
                        }
                        ++i;
                        if (i == main_body) {
                                x += lyxfont::width(layout.labelsep,
                                                    getFont(bview->buffer(), par, -2));
                                if (par->isLineSeparator(i - 1))
                                        x-= singleWidth(bview, par, i - 1);
                                int left_margin = labelEnd(bview, row);
                                if (x < left_margin)
                                        x = left_margin;
                        }
                }
                // end of paragraph is always a suitable separator
                if (i == last && x < width)
                        last_separator = i;
        }
        
        // well, if last_separator is still 0, the line isn't breakable. 
        // don't care and cut simply at the end
        if (last_separator < 0) {
                last_separator = i;
        }
        
        // manual labels cannot be broken in LaTeX, do not care
        if (main_body && last_separator < main_body)
                last_separator = main_body - 1;
        
        return last_separator;
}


// returns the minimum space a row needs on the screen in pixel
int LyXText::fill(BufferView * bview, Row * row, int paper_width) const
{
        if (paper_width < 0)
                return 20;

        int w;
        // get the pure distance
        Paragraph::size_type const last = rowLastPrintable(row);
        
        // special handling of the right address boxes
        if (textclasslist.Style(bview->buffer()->params.textclass,
                                row->par()->getLayout()).margintype
            == MARGIN_RIGHT_ADDRESS_BOX) {
                int const tmpfill = row->fill();
                row->fill(0); // the minfill in MarginLeft()
                w = leftMargin(bview, row);
                row->fill(tmpfill);
        } else
                w = leftMargin(bview, row);
        
        LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
                                                       row->par()->getLayout());
        Paragraph::size_type const main_body = 
                beginningOfMainBody(bview->buffer(), row->par());
        Paragraph::size_type i = row->pos();

        while (i <= last) {
                if (main_body > 0 && i == main_body) {
                        w += lyxfont::width(layout.labelsep, getFont(bview->buffer(), row->par(), -2));
                        if (row->par()->isLineSeparator(i - 1))
                                w -= singleWidth(bview, row->par(), i - 1);
                        int left_margin = labelEnd(bview, row);
                        if (w < left_margin)
                                w = left_margin;
                }
                w += singleWidth(bview, row->par(), i);
                ++i;
        }
        if (main_body > 0 && main_body > last) {
                w += lyxfont::width(layout.labelsep, getFont(bview->buffer(), row->par(), -2));
                if (last >= 0 && row->par()->isLineSeparator(last))
                        w -= singleWidth(bview, row->par(), last);
                int const left_margin = labelEnd(bview, row);
                if (w < left_margin)
                        w = left_margin;
        }
        
        int const fill = paper_width - w - rightMargin(bview->buffer(), row);
#ifdef WITH_WARNINGS
#warning Please fix me (Jug!)
#endif
#if 0
        if (fill < 0)
                return 0;
#endif
        return fill;
}


// returns the minimum space a manual label needs on the screen in pixel
int LyXText::labelFill(BufferView * bview, Row const * row) const
{
        Paragraph::size_type last = beginningOfMainBody(bview->buffer(), row->par()) - 1;
        // -1 because a label ends either with a space that is in the label, 
        // or with the beginning of a footnote that is outside the label.

        // I don't understand this code in depth, but sometimes "last" is
        // less than 0 and this causes a crash. This fix seems to work
        // correctly, but I bet the real error is elsewhere.  The bug is
        // triggered when you have an open footnote in a paragraph
        // environment with a manual label. (Asger)
        if (last < 0) last = 0;
        
        if (row->par()->isLineSeparator(last)) /* a sepearator at this end 
                                                does not count */
                --last;
        
        int w = 0;
        int i = row->pos();
        while (i <= last) {
                w += singleWidth(bview, row->par(), i);
                ++i;
        }
        
        int fill = 0;
        if (!row->par()->params().labelWidthString().empty()) {
                fill = max(lyxfont::width(row->par()->params().labelWidthString(),
                                          getFont(bview->buffer(), row->par(), -2)) - w,
                           0);
        }
        
        return fill;
}


// returns the number of separators in the specified row. The separator 
// on the very last column doesnt count
int LyXText::numberOfSeparators(Buffer const * buf, Row const * row) const
{
        Paragraph::size_type const last = rowLast(row);
        Paragraph::size_type p =
                max(row->pos(), beginningOfMainBody(buf, row->par()));
        int n = 0;
        for (; p < last; ++p) {
                if (row->par()->isSeparator(p)) {
                        ++n;
                }
        }
        return n;
}


// returns the number of hfills in the specified row. The LyX-Hfill is
// a LaTeX \hfill so that the hfills at the beginning and at the end were 
// ignored. This is *MUCH* more usefull than not to ignore!
int LyXText::numberOfHfills(Buffer const * buf, Row const * row) const
{
        Paragraph::size_type const last = rowLast(row);
        Paragraph::size_type first = row->pos();
        if (first) { /* hfill *DO* count at the beginning 
                      * of paragraphs! */
                while(first <= last && row->par()->isHfill(first))
                        ++first;
        }

        first = max(first, beginningOfMainBody(buf, row->par()));
        int n = 0;
        for (int p = first; p <= last; ++p) { // last, because the end is ignored!
                if (row->par()->isHfill(p)) {
                        ++n;
                }
        }
        return n;
}


// like NumberOfHfills, but only those in the manual label!
int LyXText::numberOfLabelHfills(Buffer const * buf, Row const * row) const
{
        Paragraph::size_type last = rowLast(row);
        Paragraph::size_type first = row->pos();
        if (first) { /* hfill *DO* count at the beginning 
                      * of paragraphs! */
                while(first < last && row->par()->isHfill(first))
                        ++first;
        }

        last = min(last, beginningOfMainBody(buf, row->par()));
        int n = 0;
        for (Paragraph::size_type p = first;
             p < last; ++p) {  // last, because the end is ignored!
                if (row->par()->isHfill(p)) {
                        ++n;
                }
        }
        return n;
}


// returns true, if a expansion is needed.
// Rules are given by LaTeX
bool LyXText::hfillExpansion(Buffer const * buf, Row const * row_ptr,
                             Paragraph::size_type pos) const
{
        // by the way, is it a hfill?
        if (!row_ptr->par()->isHfill(pos))
                return false;
        
        // at the end of a row it does not count
        if (pos >= rowLast(row_ptr))
                return false;
        
        // at the beginning of a row it does not count, if it is not 
        // the first row of a paragaph
        if (!row_ptr->pos())
                return true;
        
        // in some labels  it does not count
        if (textclasslist.Style(buf->params.textclass,
                                row_ptr->par()->getLayout()).margintype
            != MARGIN_MANUAL
            && pos < beginningOfMainBody(buf, row_ptr->par()))
                return false; 
        
        // if there is anything between the first char of the row and
        // the sepcified position that is not a newline and not a hfill,
        // the hfill will count, otherwise not
        Paragraph::size_type i = row_ptr->pos();
        while (i < pos && (row_ptr->par()->isNewline(i)
                           || row_ptr->par()->isHfill(i)))
                ++i;
        
        return i != pos;
}


void LyXText::setHeightOfRow(BufferView * bview, Row * row_ptr) const
{
    /* get the maximum ascent and the maximum descent */
   int asc = 0;
   int desc = 0;
   float layoutasc = 0;
   float layoutdesc = 0;
   float tmptop = 0;
   LyXFont tmpfont;
   Inset * tmpinset = 0;

   /* this must not happen before the currentrow for clear reasons.
      so the trick is just to set the current row onto this row */
   int unused_y;
   getRow(row_ptr->par(), row_ptr->pos(), unused_y);

   /* ok , let us initialize the maxasc and maxdesc value. 
    * This depends in LaTeX of the font of the last character
    * in the paragraph. The hack below is necessary because
    * of the possibility of open footnotes */

   /* Correction: only the fontsize count. The other properties
      are taken from the layoutfont. Nicer on the screen :) */
   Paragraph * par = row_ptr->par();
   Paragraph * firstpar = row_ptr->par();
   
   LyXLayout const & layout = textclasslist.Style(bview->buffer()->params.textclass,
                                                  firstpar->getLayout());

   LyXFont font = getFont(bview->buffer(), par, par->size() - 1);
   LyXFont::FONT_SIZE const size = font.size();
   font = getFont(bview->buffer(), par, -1);
   font.setSize(size);

   LyXFont labelfont = getFont(bview->buffer(), par, -2);

   float spacing_val = 1.0;
   if (!row_ptr->par()->params().spacing().isDefault()) {
           spacing_val = row_ptr->par()->params().spacing().getValue();
   } else {
           spacing_val = bview->buffer()->params.spacing.getValue();
   }
   //lyxerr << "spacing_val = " << spacing_val << endl;
   
   int maxasc = int(lyxfont::maxAscent(font) *
                   layout.spacing.getValue() *
                   spacing_val);
   int maxdesc = int(lyxfont::maxDescent(font) *
                    layout.spacing.getValue() *
                    spacing_val);
   int const pos_end = rowLast(row_ptr);
   int labeladdon = 0;
   int maxwidth = 0;

   // Check if any insets are larger
   for (int pos = row_ptr->pos(); pos <= pos_end; ++pos) {
           if (row_ptr->par()->getChar(pos) == Paragraph::META_INSET) {
                   tmpfont = getFont(bview->buffer(), row_ptr->par(), pos);
                   tmpinset = row_ptr->par()->getInset(pos);
                   if (tmpinset) {
#if 1 // this is needed for deep update on initialitation
                           tmpinset->update(bview, tmpfont);
#endif
                           asc = tmpinset->ascent(bview, tmpfont);
                           desc = tmpinset->descent(bview, tmpfont);
                           maxwidth += tmpinset->width(bview, tmpfont);
                           maxasc = max(maxasc, asc);
                           maxdesc = max(maxdesc, desc);
                   }
           } else {
                   maxwidth += singleWidth(bview, row_ptr->par(), pos);
           }
   }

   // Check if any custom fonts are larger (Asger)
   // This is not completely correct, but we can live with the small,
   // cosmetic error for now.
   LyXFont::FONT_SIZE const maxsize =
           row_ptr->par()->highestFontInRange(row_ptr->pos(),
                                              pos_end);
   if (maxsize > font.size()) {
        font.setSize(maxsize);

        asc = lyxfont::maxAscent(font);
        desc = lyxfont::maxDescent(font);
        if (asc > maxasc) 
                maxasc = asc;
        if (desc > maxdesc)
                maxdesc = desc;
   }

   // This is nicer with box insets:
   ++maxasc;
   ++maxdesc;

   row_ptr->ascent_of_text(maxasc);
   
   // is it a top line?
   if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
      
           // some parksips VERY EASY IMPLEMENTATION
      if (bview->buffer()->params.paragraph_separation ==
          BufferParams::PARSEP_SKIP) {
         if (layout.isParagraph()
             && firstpar->getDepth() == 0
             && firstpar->previous())
            maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
         else if (firstpar->previous()
                  && textclasslist.Style(bview->buffer()->params.textclass,
                           firstpar->previous()->getLayout()).isParagraph()
                  && firstpar->previous()->getDepth() == 0)
           // is it right to use defskip here too? (AS)
           maxasc += bview->buffer()->params.getDefSkip().inPixels(bview);
      }
      
      // the paper margins
      if (!row_ptr->par()->previous() && bv_owner)
         maxasc += LYX_PAPER_MARGIN;
      
      // add the vertical spaces, that the user added
      if (firstpar->params().spaceTop().kind() != VSpace::NONE)
         maxasc += int(firstpar->params().spaceTop().inPixels(bview));
      
      // do not forget the DTP-lines!
      // there height depends on the font of the nearest character
      if (firstpar->params().lineTop())
         maxasc += 2 * lyxfont::ascent('x', getFont(bview->buffer(),
                                                    firstpar, 0));
      
      // and now the pagebreaks
      if (firstpar->params().pagebreakTop())
         maxasc += 3 * defaultHeight();
      
      // This is special code for the chapter, since the label of this
      // layout is printed in an extra row
      if (layout.labeltype == LABEL_COUNTER_CHAPTER
          && bview->buffer()->params.secnumdepth >= 0) {
              float spacing_val = 1.0;
              if (!row_ptr->par()->params().spacing().isDefault()) {
                      spacing_val = row_ptr->par()->params().spacing().getValue();
              } else {
                      spacing_val = bview->buffer()->params.spacing.getValue();
              }
              
              labeladdon = int(lyxfont::maxDescent(labelfont) *
                               layout.spacing.getValue() *
                               spacing_val)
                      + int(lyxfont::maxAscent(labelfont) *
                            layout.spacing.getValue() *
                            spacing_val);
      }
      
      // special code for the top label
      if ((layout.labeltype == LABEL_TOP_ENVIRONMENT
           || layout.labeltype == LABEL_BIBLIO
           || layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT)
          && row_ptr->par()->isFirstInSequence()
          && !row_ptr->par()->getLabelstring().empty()) {
              float spacing_val = 1.0;
              if (!row_ptr->par()->params().spacing().isDefault()) {
                      spacing_val = row_ptr->par()->params().spacing().getValue();
              } else {
                      spacing_val = bview->buffer()->params.spacing.getValue();
              }
              
              labeladdon = int(
                      (lyxfont::maxAscent(labelfont) *
                       layout.spacing.getValue() *
                       spacing_val)
                      +(lyxfont::maxDescent(labelfont) *
                        layout.spacing.getValue() *
                        spacing_val)
                      + layout.topsep * defaultHeight()
                      + layout.labelbottomsep *  defaultHeight());
      }
   
      // and now the layout spaces, for example before and after a section, 
      // or between the items of a itemize or enumerate environment
      
      if (!firstpar->params().pagebreakTop()) {
         Paragraph * prev = row_ptr->par()->previous();
         if (prev)
            prev = row_ptr->par()->depthHook(row_ptr->par()->getDepth());
         if (prev && prev->getLayout() == firstpar->getLayout()
             && prev->getDepth() == firstpar->getDepth()
             && prev->getLabelWidthString() == firstpar->getLabelWidthString())
           {
              layoutasc = (layout.itemsep * defaultHeight());
           }
         else if (row_ptr->previous()) {
            tmptop = layout.topsep;
            
            if (row_ptr->previous()->par()->getDepth() >= row_ptr->par()->getDepth())
               tmptop -= textclasslist.Style(bview->buffer()->params.textclass,
                                             row_ptr->previous()->par()->
                                             getLayout()).bottomsep;
            
            if (tmptop > 0)
               layoutasc = (tmptop * defaultHeight());
         }
         else if (row_ptr->par()->params().lineTop()) {
            tmptop = layout.topsep;
            
            if (tmptop > 0)
               layoutasc = (tmptop * defaultHeight());
         }
         
         prev = row_ptr->par()->outerHook();
         if (prev)  {
            maxasc += int(textclasslist.Style(bview->buffer()->params.textclass,
                                         prev->getLayout()).parsep * defaultHeight());
         }
         else {
                if (firstpar->previous()
                    && firstpar->previous()->getDepth() == 0
                    && firstpar->previous()->getLayout() != firstpar->getLayout()) {
                        // avoid parsep
                }
            else if (firstpar->previous()){
               maxasc += int(layout.parsep * defaultHeight());
            }
         }
      }
   }
   
   // is it a bottom line?
   if (row_ptr->par() == par
       && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par())) {
          
           // the paper margins
          if (!par->next() && bv_owner)
            maxdesc += LYX_PAPER_MARGIN;
          
          // add the vertical spaces, that the user added
          if (firstpar->params().spaceBottom().kind() != VSpace::NONE)
                  maxdesc += int(firstpar->params().spaceBottom().inPixels(bview));
          
          // do not forget the DTP-lines!
          // there height depends on the font of the nearest character
          if (firstpar->params().lineBottom())
                  maxdesc += 2 * lyxfont::ascent('x',
                                                 getFont(bview->buffer(),
                                                         par, par->size() - 1));
          
          // and now the pagebreaks
          if (firstpar->params().pagebreakBottom())
            maxdesc += 3 * defaultHeight();
          
          // and now the layout spaces, for example before and after
          // a section, or between the items of a itemize or enumerate
          // environment
          if (!firstpar->params().pagebreakBottom() && row_ptr->par()->next()) {
             Paragraph * nextpar = row_ptr->par()->next();
             Paragraph * comparepar = row_ptr->par();
             float usual = 0;
             float unusual = 0;
             
             if (comparepar->getDepth() > nextpar->getDepth()) {
                usual = (textclasslist.Style(bview->buffer()->params.textclass, comparepar->getLayout()).bottomsep * defaultHeight());
                comparepar = comparepar->depthHook(nextpar->getDepth());
                if (comparepar->getLayout()!= nextpar->getLayout()
                    || nextpar->getLabelWidthString() != 
                        comparepar->getLabelWidthString())
                  unusual = (textclasslist.Style(bview->buffer()->params.textclass, comparepar->getLayout()).bottomsep * defaultHeight());
                
                if (unusual > usual)
                  layoutdesc = unusual;
                else
                  layoutdesc = usual;
             }
             else if (comparepar->getDepth() ==  nextpar->getDepth()) {
                
                if (comparepar->getLayout()!= nextpar->getLayout()
                    || nextpar->getLabelWidthString() != 
                        comparepar->getLabelWidthString())
                  layoutdesc = int(textclasslist.Style(bview->buffer()->params.textclass, comparepar->getLayout()).bottomsep * defaultHeight());
             }
          }
       }
   
   // incalculate the layout spaces
   maxasc += int(layoutasc * 2 / (2 + firstpar->getDepth()));
   maxdesc += int(layoutdesc * 2 / (2 + firstpar->getDepth()));

   // calculate the new height of the text
   height -= row_ptr->height();
   
   row_ptr->height(maxasc + maxdesc + labeladdon);
   row_ptr->baseline(maxasc + labeladdon);
   
   height += row_ptr->height();
   float x;
   float dummy;
   prepareToPrint(bview, row_ptr, x, dummy, dummy, dummy, false);
   row_ptr->width(int(maxwidth + x));
   if (inset_owner) {
           Row * r = firstrow;
           width = max(0,workWidth(bview));
           while(r) {
                   if (r->width() > width)
                           width = r->width();
                   r = r->next();
           }
   }
}


/* Appends the implicit specified paragraph behind the specified row,
 * start at the implicit given position */
void LyXText::appendParagraph(BufferView * bview, Row * row) const
{
   bool not_ready = true;
   
   // The last character position of a paragraph is an invariant so we can 
   // safely get it here. (Asger)
   int const lastposition = row->par()->size();
   do {
      // Get the next breakpoint
      int z = nextBreakPoint(bview, row, workWidth(bview));
      
      Row * tmprow = row;

      // Insert the new row
      if (z < lastposition) {
         ++z;
         insertRow(row, row->par(), z);
         row = row->next();

         row->height(0);
      } else
         not_ready = false;
      
      // Set the dimensions of the row
#ifdef WITH_WARNINGS
#warning Something is rotten here! (Jug)
#endif
      tmprow->fill(fill(bview, tmprow, workWidth(bview)));
      setHeightOfRow(bview, tmprow);

   } while (not_ready);
}


void LyXText::breakAgain(BufferView * bview, Row * row) const
{
        bool not_ready = true;
   
        do  {
                // get the next breakpoint
                Paragraph::size_type z = nextBreakPoint(bview, row, workWidth(bview));
                Row * tmprow = row;

                if (z < row->par()->size()) {
                        if (!row->next() || (row->next() && row->next()->par() != row->par())) {
                                // insert a new row
                                ++z;
                                insertRow(row, row->par(), z);
                                row = row->next();
                                row->height(0);
                        } else  {
                                row = row->next();
                                ++z;
                                if (row->pos() == z)
                                        not_ready = false;     // the rest will not change
                                else {
                                        row->pos(z);
                                }
                        }
                } else {
                        /* if there are some rows too much, delete them */
                        /* only if you broke the whole paragraph! */ 
                        Row * tmprow2 = row;
                        while (tmprow2->next() && tmprow2->next()->par() == row->par()) {
                                tmprow2 = tmprow2->next();
                        }
                        while (tmprow2 != row) {
                                tmprow2 = tmprow2->previous();
                                removeRow(tmprow2->next());
                        }
                        not_ready = false;
                }
                
                /* set the dimensions of the row */ 
                tmprow->fill(fill(bview, tmprow, workWidth(bview)));
                setHeightOfRow(bview, tmprow);
        } while (not_ready);
}


// this is just a little changed version of break again
void LyXText::breakAgainOneRow(BufferView * bview, Row * row)
{
        // get the next breakpoint
        Paragraph::size_type z = nextBreakPoint(bview, row, workWidth(bview));
        Row * tmprow = row;

        if (z < row->par()->size()) {
                if (!row->next()
                    || (row->next() && row->next()->par() != row->par())) {
                        /* insert a new row */ 
                        ++z;
                        insertRow(row, row->par(), z);
                        row = row->next();
                        row->height(0);
                } else  {
                        row= row->next();
                        ++z;
                        if (row->pos() != z)
                                row->pos(z);
                }
        } else {
                // if there are some rows too much, delete them
                // only if you broke the whole paragraph!
                Row * tmprow2 = row;
                while (tmprow2->next()
                       && tmprow2->next()->par() == row->par()) {
                        tmprow2 = tmprow2->next();
                }
                while (tmprow2 != row) {
                        tmprow2 = tmprow2->previous();
                        removeRow(tmprow2->next());
                }
        }
        
        // set the dimensions of the row
        tmprow->fill(fill(bview, tmprow, workWidth(bview)));
        setHeightOfRow(bview, tmprow);
}


void LyXText::breakParagraph(BufferView * bview, char keep_layout)
{
   LyXLayout const & layout =
           textclasslist.Style(bview->buffer()->params.textclass,
                               cursor.par()->getLayout());

   // this is only allowed, if the current paragraph is not empty or caption
   if ((cursor.par()->size() <= 0)
       && layout.labeltype!= LABEL_SENSITIVE)
           return;
   
   setUndo(bview, Undo::INSERT,cursor.par(),cursor.par()->next()); 

   // Always break behind a space
   //
   // It is better to erase the space (Dekel)
   if (cursor.pos() < cursor.par()->size()
       && cursor.par()->isLineSeparator(cursor.pos()))
           cursor.par()->erase(cursor.pos());
           // cursor.pos(cursor.pos() + 1);

   // break the paragraph
   if (keep_layout)
     keep_layout = 2;
   else 
     keep_layout = layout.isEnvironment();
   cursor.par()->breakParagraph(bview->buffer()->params, cursor.pos(),
                                keep_layout);

   // well this is the caption hack since one caption is really enough
   if (layout.labeltype == LABEL_SENSITIVE) {
     if (!cursor.pos())
             // set to standard-layout
             cursor.par()->setLayout(0);
     else
             // set to standard-layout
             cursor.par()->next()->setLayout(0);
   }
   
   /* if the cursor is at the beginning of a row without prior newline, 
    * move one row up! 
    * This touches only the screen-update. Otherwise we would may have
    * an empty row on the screen */
   if (cursor.pos() && !cursor.row()->par()->isNewline(cursor.row()->pos() - 1)
       && cursor.row()->pos() == cursor.pos()) {
           cursorLeft(bview);
   } 
   
   status(bview, LyXText::NEED_MORE_REFRESH);
   refresh_row = cursor.row();
   refresh_y = cursor.y() - cursor.row()->baseline();
   
   // Do not forget the special right address boxes
   if (layout.margintype == MARGIN_RIGHT_ADDRESS_BOX) {
      while (refresh_row->previous() &&
             refresh_row->previous()->par() == refresh_row->par()) {
              refresh_row = refresh_row->previous();
              refresh_y -= refresh_row->height();
      }
   }
   removeParagraph(cursor.row());
   
   // set the dimensions of the cursor row
   cursor.row()->fill(fill(bview, cursor.row(), workWidth(bview)));

   setHeightOfRow(bview, cursor.row());

   while (cursor.par()->next()->size()
          && cursor.par()->next()->isNewline(0))
           cursor.par()->next()->erase(0);
   
   insertParagraph(bview, cursor.par()->next(), cursor.row());

   updateCounters(bview, cursor.row()->previous());
   
   /* This check is necessary. Otherwise the new empty paragraph will
    * be deleted automatically. And it is more friendly for the user! */ 
   if (cursor.pos())
           setCursor(bview, cursor.par()->next(), 0);
   else
           setCursor(bview, cursor.par(), 0);
   
   if (cursor.row()->next())
           breakAgain(bview, cursor.row()->next());

   need_break_row = 0;
}


// Just a macro to make some thing easier. 
void LyXText::redoParagraph(BufferView * bview) const
{
        clearSelection(bview);
        redoParagraphs(bview, cursor, cursor.par()->next());
        setCursorIntern(bview, cursor.par(), cursor.pos());
}


/* insert a character, moves all the following breaks in the 
 * same Paragraph one to the right and make a rebreak */
void LyXText::insertChar(BufferView * bview, char c)
{
        setUndo(bview, Undo::INSERT,
                cursor.par(), cursor.par()->next());

        // When the free-spacing option is set for the current layout,
        // disable the double-space checking

        bool const freeSpacing = 
                textclasslist.Style(bview->buffer()->params.textclass,
                               cursor.row()->par()->getLayout()).free_spacing;


        if (lyxrc.auto_number) {
                static string const number_operators = "+-/*";
                static string const number_unary_operators = "+-";
                static string const number_seperators = ".,:";

                if (current_font.number() == LyXFont::ON) {
                        if (!isdigit(c) && !contains(number_operators, c) &&
                            !(contains(number_seperators, c) &&
                              cursor.pos() >= 1 &&
                              cursor.pos() < cursor.par()->size() &&
                              getFont(bview->buffer(),
                                      cursor.par(),
                                      cursor.pos()).number() == LyXFont::ON &&
                              getFont(bview->buffer(),
                                      cursor.par(),
                                      cursor.pos()-1).number() == LyXFont::ON)
                            )
                                Number(bview); // Set current_font.number to OFF
                } else if (isdigit(c) &&
                           real_current_font.isVisibleRightToLeft()) {
                        Number(bview); // Set current_font.number to ON

                        if (cursor.pos() > 0) {
                                char const c = cursor.par()->getChar(cursor.pos() - 1);
                                if (contains(number_unary_operators, c) &&
                                    (cursor.pos() == 1 ||
                                     cursor.par()->isSeparator(cursor.pos() - 2) ||
                                     cursor.par()->isNewline(cursor.pos() - 2) )
                                   ) {
                                        setCharFont(bview->buffer(),
                                                    cursor.par(),
                                                    cursor.pos() - 1,
                                                    current_font);
                                } else if (contains(number_seperators, c) &&
                                           cursor.pos() >= 2 &&
                                           getFont(bview->buffer(),
                                                   cursor.par(),
                                                   cursor.pos()-2).number() == LyXFont::ON) {
                                        setCharFont(bview->buffer(),
                                                    cursor.par(),
                                                    cursor.pos() - 1,
                                                    current_font);
                                }
                        }
                }
        }


        /* First check, if there will be two blanks together or a blank at 
          the beginning of a paragraph. 
          I decided to handle blanks like normal characters, the main 
          difference are the special checks when calculating the row.fill
          (blank does not count at the end of a row) and the check here */ 

        // The bug is triggered when we type in a description environment:
        // The current_font is not changed when we go from label to main text
        // and it should (along with realtmpfont) when we type the space.
        // CHECK There is a bug here! (Asger)
        
        LyXFont realtmpfont = real_current_font;
        LyXFont rawtmpfont = current_font;  /* store the current font.
                                     * This is because of the use
                                     * of cursor movements. The moving
                                     * cursor would refresh the 
                                     * current font */

        // Get the font that is used to calculate the baselineskip
        Paragraph::size_type const lastpos = cursor.par()->size();
        LyXFont rawparfont =
                cursor.par()->getFontSettings(bview->buffer()->params,
                                              lastpos - 1);

        bool jumped_over_space = false;
   
        if (!freeSpacing && IsLineSeparatorChar(c)) {
                if ((cursor.pos() > 0 
                     && cursor.par()->isLineSeparator(cursor.pos() - 1))
                    || (cursor.pos() > 0
                        && cursor.par()->isNewline(cursor.pos() - 1))
                    || (cursor.pos() == 0)) {
                        static bool sent_space_message = false;
                        if (!sent_space_message) {
                                if (cursor.pos() == 0) 
                                        bview->owner()->message(_("You cannot insert a space at the beginning of a paragraph.  Please read the Tutorial."));
                                else
                                        bview->owner()->message(_("You cannot type two spaces this way.  Please read the Tutorial."));
                                sent_space_message = true;
                        }
                        charInserted();
                        return;
                }
        } else if (IsNewlineChar(c)) {
                if (cursor.par() == cursor.par()
                    && cursor.pos() <= beginningOfMainBody(bview->buffer(), cursor.par())) {
                        charInserted();
                        return;
                }
                /* No newline at first position 
                 * of a paragraph or behind labels. 
                 * TeX does not allow that. */

                if (cursor.pos() < cursor.par()->size() &&
                    cursor.par()->isLineSeparator(cursor.pos()))
                        // newline always after a blank!
                        cursorRight(bview);
                cursor.row()->fill(-1);        // to force a new break
        }
   
        // the display inset stuff
        if (cursor.row()->par()->getChar(cursor.row()->pos()) == Paragraph::META_INSET
            && cursor.row()->par()->getInset(cursor.row()->pos())
            && (cursor.row()->par()->getInset(cursor.row()->pos())->display() ||
                cursor.row()->par()->getInset(cursor.row()->pos())->needFullRow()))
                cursor.row()->fill(-1); // to force a new break  

        // get the cursor row fist
        Row * row = cursor.row();
        int y = cursor.y() - row->baseline();
        if (c != Paragraph::META_INSET) /* Here case LyXText::InsertInset 
                                            * already insertet the character */
                cursor.par()->insertChar(cursor.pos(), c);
        setCharFont(bview->buffer(), cursor.par(), cursor.pos(), rawtmpfont);

        if (!jumped_over_space) {
                // refresh the positions
                Row * tmprow = row;
                while (tmprow->next() && tmprow->next()->par() == row->par()) {
                        tmprow = tmprow->next();
                        tmprow->pos(tmprow->pos() + 1);
                }
        }
   
        // Is there a break one row above
        if ((cursor.par()->isLineSeparator(cursor.pos())
             || cursor.par()->isNewline(cursor.pos())
             || cursor.row()->fill() == -1)
            && row->previous() && row->previous()->par() == row->par()) {
                Paragraph::size_type z = nextBreakPoint(bview,
                                                           row->previous(),
                                                           workWidth(bview));
                if (z >= row->pos()) {
                        row->pos(z + 1);
                        
                        // set the dimensions of the row above
                        row->previous()->fill(fill(bview,
                                                   row->previous(),
                                                   workWidth(bview)));

                        setHeightOfRow(bview, row->previous());
             
                        y -= row->previous()->height();
                        refresh_y = y;
                        refresh_row = row->previous();
                        status(bview, LyXText::NEED_MORE_REFRESH);
             
                        breakAgainOneRow(bview, row);

                        current_font = rawtmpfont;
                        real_current_font = realtmpfont;
                        setCursor(bview, cursor.par(), cursor.pos() + 1,
                                  false, cursor.boundary());
                        // cursor MUST be in row now.
             
                        if (row->next() && row->next()->par() == row->par())
                                need_break_row = row->next();
                        else
                                need_break_row = 0;
             
                        // check, wether the last characters font has changed.
                        if (cursor.pos() && cursor.pos() == cursor.par()->size()
                            && rawparfont != rawtmpfont)
                                redoHeightOfParagraph(bview, cursor);
                        
                        charInserted();
                        return;
                }
        }
   
        // recalculate the fill of the row
        if (row->fill() >= 0)  /* needed because a newline
                              * will set fill to -1. Otherwise
                              * we would not get a rebreak! */
                row->fill(fill(bview, row, workWidth(bview)));
        if (row->fill() < 0) {
                refresh_y = y;
                refresh_row = row; 
                refresh_x = cursor.x();
                refresh_pos = cursor.pos();
                status(bview, LyXText::NEED_MORE_REFRESH);
                breakAgainOneRow(bview, row); 
                // will the cursor be in another row now?
                if (rowLast(row) <= cursor.pos() + 1 && row->next()) {
                        if (row->next() && row->next()->par() == row->par())
                                // this should always be true
                                row = row->next();
                        breakAgainOneRow(bview, row);
                }
                current_font = rawtmpfont;
                real_current_font = realtmpfont;

                setCursor(bview, cursor.par(), cursor.pos() + 1, false,
                          cursor.boundary());
                if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
                    != cursor.boundary())
                        setCursor(bview, cursor.par(), cursor.pos(), false,
                          !cursor.boundary());
                if (row->next() && row->next()->par() == row->par())
                        need_break_row = row->next();
                else
                        need_break_row = 0;             
        } else {
                refresh_y = y;
                refresh_x = cursor.x();
                refresh_row = row;
                refresh_pos = cursor.pos();
                
                int const tmpheight = row->height();
                setHeightOfRow(bview, row);
                if (tmpheight == row->height())
                        status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
                else
                        status(bview, LyXText::NEED_MORE_REFRESH);
            
                current_font = rawtmpfont;
                real_current_font = realtmpfont;
                setCursor(bview, cursor.par(), cursor.pos() + 1, false,
                          cursor.boundary());
        }

        // check, wether the last characters font has changed.
        if (cursor.pos() && cursor.pos() == cursor.par()->size()
            && rawparfont != rawtmpfont) {
                redoHeightOfParagraph(bview, cursor);
        } else {
                // now the special right address boxes
                if (textclasslist.Style(bview->buffer()->params.textclass,
                                   cursor.par()->getLayout()).margintype
                    == MARGIN_RIGHT_ADDRESS_BOX) {
                        redoDrawingOfParagraph(bview, cursor); 
                }
        }

        charInserted();
}
   

void LyXText::charInserted()
{
        // Here we could call FinishUndo for every 20 characters inserted.
        // This is from my experience how emacs does it.
        static unsigned int counter;
        if (counter < 20) {
                ++counter;
        } else {
                finishUndo();
                counter = 0;
        }
}


void LyXText::prepareToPrint(BufferView * bview,
                             Row * row, float & x,
                             float & fill_separator, 
                             float & fill_hfill,
                             float & fill_label_hfill,
                             bool bidi) const
{
        float nlh;
        float ns;
        
        float w = row->fill();
        fill_hfill = 0;
        fill_label_hfill = 0;
        fill_separator = 0;
        fill_label_hfill = 0;

        bool const is_rtl =
                row->par()->isRightToLeftPar(bview->buffer()->params);
        if (is_rtl) {
                x = (workWidth(bview) > 0)
                        ? rightMargin(bview->buffer(), row) : 0;
        } else
                x = (workWidth(bview) > 0) ? leftMargin(bview, row) : 0;
        
        // is there a manual margin with a manual label
        if (textclasslist.Style(bview->buffer()->params.textclass,
                           row->par()->getLayout()).margintype == MARGIN_MANUAL
            && textclasslist.Style(bview->buffer()->params.textclass,
                              row->par()->getLayout()).labeltype == LABEL_MANUAL) {
               
                /* one more since labels are left aligned */ 
                nlh = numberOfLabelHfills(bview->buffer(), row) + 1;
                if (nlh && !row->par()->getLabelWidthString().empty()) {
                        fill_label_hfill = labelFill(bview, row) / nlh;
                }
        }
                
        // are there any hfills in the row?
        float const nh = numberOfHfills(bview->buffer(), row);

        if (nh)
          fill_hfill = w / nh;
        else  {
                // is it block, flushleft or flushright? 
                // set x how you need it
        int align;
        if (row->par()->params().align() == LYX_ALIGN_LAYOUT)
          align = textclasslist.Style(bview->buffer()->params.textclass, row->par()->getLayout()).align;
        else
          align = row->par()->params().align();
           
        // center displayed insets 
        Inset * inset;
           if (row->par()->getChar(row->pos()) == Paragraph::META_INSET
               && (inset=row->par()->getInset(row->pos()))
               && (inset->display())) // || (inset->scroll() < 0)))
             align = (inset->lyxCode() == Inset::MATHMACRO_CODE)
                     ? LYX_ALIGN_BLOCK : LYX_ALIGN_CENTER;

           switch (align) {
            case LYX_ALIGN_BLOCK:
              ns = numberOfSeparators(bview->buffer(), row);
              if (ns && row->next() && row->next()->par() == row->par() &&
                  !(row->next()->par()->isNewline(row->next()->pos() - 1))
                  && !(row->next()->par()->getChar(row->next()->pos()) == Paragraph::META_INSET
                       && row->next()->par()->getInset(row->next()->pos())
                       && row->next()->par()->getInset(row->next()->pos())->display())
                  )
                fill_separator = w / ns;
              else if (is_rtl)
                x += w;
              break;
            case LYX_ALIGN_RIGHT:
              x += w;
              break;
            case LYX_ALIGN_CENTER:
              x += w / 2;
              break;
           }
        }
        if (!bidi)
                return;

        computeBidiTables(bview->buffer(), row);
        if (is_rtl) {
                Paragraph::size_type main_body = 
                        beginningOfMainBody(bview->buffer(), row->par());
                Paragraph::size_type last = rowLast(row);

                if (main_body > 0 &&
                    (main_body-1 > last || 
                     !row->par()->isLineSeparator(main_body-1))) {
                        LyXLayout const & layout =
                                textclasslist.Style(bview->buffer()->params.textclass,
                                                    row->par()->getLayout());
                        x += lyxfont::width(layout.labelsep,
                                            getFont(bview->buffer(), row->par(), -2));
                        if (main_body-1 <= last)
                                x += fill_label_hfill;
                }
        }
}
      
/* important for the screen */


/* the cursor set functions have a special mechanism. When they
* realize, that you left an empty paragraph, they will delete it.
* They also delete the corresponding row */

void LyXText::cursorRightOneWord(BufferView * bview) const
{
        // treat floats, HFills and Insets as words
        LyXCursor tmpcursor = cursor;
        // CHECK See comment on top of text.C

        if (tmpcursor.pos() == tmpcursor.par()->size()
            && tmpcursor.par()->next()) {
                        tmpcursor.par(tmpcursor.par()->next());
                        tmpcursor.pos(0);
        } else {
                int steps = 0;

                // Skip through initial nonword stuff.
                while (tmpcursor.pos() < tmpcursor.par()->size() &&
                       ! tmpcursor.par()->isWord(tmpcursor.pos())) {
                  //    printf("Current pos1 %d", tmpcursor.pos()) ;
                        tmpcursor.pos(tmpcursor.pos() + 1);
                        ++steps;
                }
                // Advance through word.
                while (tmpcursor.pos() < tmpcursor.par()->size() &&
                        tmpcursor.par()->isWord( tmpcursor.pos())) {
                  //     printf("Current pos2 %d", tmpcursor.pos()) ;
                        tmpcursor.pos(tmpcursor.pos() + 1);
                        ++steps;
                }
        }
        setCursor(bview, tmpcursor.par(), tmpcursor.pos());
}


void LyXText::cursorTab(BufferView * bview) const
{
    LyXCursor tmpcursor = cursor;
    while (tmpcursor.pos() < tmpcursor.par()->size()
           && !tmpcursor.par()->isNewline(tmpcursor.pos()))
        tmpcursor.pos(tmpcursor.pos() + 1);

    if (tmpcursor.pos() == tmpcursor.par()->size()){
        if (tmpcursor.par()->next()) {
            tmpcursor.par(tmpcursor.par()->next());
            tmpcursor.pos(0);
        }
    } else
        tmpcursor.pos(tmpcursor.pos() + 1);
    setCursor(bview, tmpcursor.par(), tmpcursor.pos());
}


/* -------> Skip initial whitespace at end of word and move cursor to *start*
            of prior word, not to end of next prior word. */

void LyXText::cursorLeftOneWord(BufferView * bview)  const
{
        LyXCursor tmpcursor = cursor;
        cursorLeftOneWord(tmpcursor);
        setCursor(bview, tmpcursor.par(), tmpcursor.pos());
}

void LyXText::cursorLeftOneWord(LyXCursor  & cur)  const
{
        // treat HFills, floats and Insets as words
        cur = cursor;
        while (cur.pos() 
               && (cur.par()->isSeparator(cur.pos() - 1) 
                   || cur.par()->isKomma(cur.pos() - 1))
               && !(cur.par()->isHfill(cur.pos() - 1)
                    || cur.par()->isInset(cur.pos() - 1)))
                cur.pos(cur.pos() - 1);

        if (cur.pos()
            && (cur.par()->isInset(cur.pos() - 1)
                || cur.par()->isHfill(cur.pos() - 1))) {
                cur.pos(cur.pos() - 1);
        } else if (!cur.pos()) {
                if (cur.par()->previous()){
                        cur.par(cur.par()->previous());
                        cur.pos(cur.par()->size());
                }
        } else {                // Here, cur != 0 
                while (cur.pos() > 0 &&
                       cur.par()->isWord(cur.pos()-1) )
                        cur.pos(cur.pos() - 1);
        }
}

/* -------> Select current word. This depends on behaviour of CursorLeftOneWord(), so it is
                        patched as well. */

void LyXText::getWord(LyXCursor & from, LyXCursor & to, word_location loc) const
{
        // first put the cursor where we wana start to select the word
        from = cursor;
        switch(loc) {
        case WHOLE_WORD:
                // Move cursor to the beginning, when not already there.
                if (from.pos() && !from.par()->isSeparator(from.pos() - 1)
                    && !from.par()->isKomma(from.pos() - 1))
                        cursorLeftOneWord(from);
                break;
        case NEXT_WORD:
                lyxerr << "LyXText::getWord: NEXT_WORD not implemented yet\n";
                break;
        case PARTIAL_WORD:
                break;
        }
        to = from;
        while (to.pos() < to.par()->size()
               && !to.par()->isSeparator(to.pos())
               && !to.par()->isKomma(to.pos())
               && !to.par()->isHfill(to.pos()) )
        {
                to.pos(to.pos() + 1);
        }
}


void LyXText::selectWord(BufferView * bview) 
{
        LyXCursor from;
        LyXCursor to;
        getWord(from, to, WHOLE_WORD);
        if (cursor != from)
                setCursor(bview, from.par(), from.pos());
        selection.cursor = cursor;
        setCursor(bview, to.par(), to.pos() );
        setSelection(bview);
}

/* -------> Select the word currently under the cursor when:
                        1: no selection is currently set,
                        2: the cursor is not at the borders of the word. */

bool LyXText::selectWordWhenUnderCursor(BufferView * bview) 
{
        if (!selection.set() &&
            cursor.pos() > 0 && cursor.pos() < cursor.par()->size()
            && !cursor.par()->isSeparator(cursor.pos())
            && !cursor.par()->isKomma(cursor.pos())
            && !cursor.par()->isSeparator(cursor.pos() -1)
            && !cursor.par()->isKomma(cursor.pos() -1)) {
                selectWord(bview);
                return true;
        }
        return false;
}


// This function is only used by the spellchecker for NextWord().
// It doesn't handle LYX_ACCENTs and probably never will.
string const LyXText::selectNextWord(BufferView * bview,
                                     float & value) const
{
        Paragraph * tmppar = cursor.par();
        
        // If this is not the very first word, skip rest of
        // current word because we are probably in the middle
        // of a word if there is text here.
        if (cursor.pos() || cursor.par()->previous()) {
                while (cursor.pos() < cursor.par()->size()
                       && cursor.par()->isLetter(cursor.pos()))
                        cursor.pos(cursor.pos() + 1);
        }
        
        // Now, skip until we have real text (will jump paragraphs)
        while ((cursor.par()->size() > cursor.pos()
                && (!cursor.par()->isLetter(cursor.pos())
#ifndef NO_LATEX
                    || cursor.par()->getFont(bview->buffer()->params, cursor.pos())
                    .latex() == LyXFont::ON
#endif
                        ))
               || (cursor.par()->size() == cursor.pos()
                   && cursor.par()->next())){
                if (cursor.pos() == cursor.par()->size()) {
                        cursor.par(cursor.par()->next());
                        cursor.pos(0);
                } else
                        cursor.pos(cursor.pos() + 1);
        }
  
        // Update the value if we changed paragraphs
        if (cursor.par() != tmppar){
                setCursor(bview, cursor.par(), cursor.pos());
                value = float(cursor.y())/float(height);
        }

        // Start the selection from here
        selection.cursor = cursor;
        
        ostringstream latex;

        // and find the end of the word 
        // (optional hyphens are part of a word)
        while (cursor.pos() < cursor.par()->size()
               && (cursor.par()->isLetter(cursor.pos())) 
                   || (cursor.par()->getChar(cursor.pos()) == Paragraph::META_INSET
                       && cursor.par()->getInset(cursor.pos()) != 0
                       && cursor.par()->getInset(cursor.pos())->latex(bview->buffer(), latex, false, false) == 0
                       && latex.str() == "\\-"
                           ))
                cursor.pos(cursor.pos() + 1);

        // Finally, we copy the word to a string and return it
        string str;
        if (selection.cursor.pos() < cursor.pos()) {
                Paragraph::size_type i;
                for (i = selection.cursor.pos(); i < cursor.pos(); ++i) {
                        if (cursor.par()->getChar(i) != Paragraph::META_INSET)
                                str += cursor.par()->getChar(i);
                }
        }
        return str;
}


// This one is also only for the spellchecker
void LyXText::selectSelectedWord(BufferView * bview)
{
        // move cursor to the beginning
        setCursor(bview, selection.cursor.par(), selection.cursor.pos());
        
        // set the sel cursor
        selection.cursor = cursor;
        ostringstream latex;
        
        // now find the end of the word
        while (cursor.pos() < cursor.par()->size()
               && (cursor.par()->isLetter(cursor.pos())
                   || (cursor.par()->getChar(cursor.pos()) == Paragraph::META_INSET
                       && cursor.par()->getInset(cursor.pos()) != 0
                       && cursor.par()->getInset(cursor.pos())->latex(bview->buffer(), latex, false, false) == 0
                       && latex.str() == "\\-"
                           )))
                cursor.pos(cursor.pos() + 1);
        
        setCursor(bview, cursor.par(), cursor.pos());
        
        // finally set the selection
        setSelection(bview);
}


/* -------> Delete from cursor up to the end of the current or next word. */
void LyXText::deleteWordForward(BufferView * bview)
{
        if (!cursor.par()->size())
                cursorRight(bview);
        else {
                LyXCursor tmpcursor = cursor;
                tmpcursor.row(0); // ??
                selection.set(true); // to avoid deletion
                cursorRightOneWord(bview);
                setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
                selection.cursor = cursor;
                cursor = tmpcursor;
                setSelection(bview); 
                
                /* -----> Great, CutSelection() gets rid of multiple spaces. */
                cutSelection(bview);
        }
}


/* -------> Delete from cursor to start of current or prior word. */
void LyXText::deleteWordBackward(BufferView * bview)
{
       if (!cursor.par()->size())
               cursorLeft(bview);
       else {
               LyXCursor tmpcursor = cursor;
               tmpcursor.row(0); // ??
               selection.set(true); // to avoid deletion
               cursorLeftOneWord(bview);
               setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
               selection.cursor = cursor;
               cursor = tmpcursor;
               setSelection(bview);
               cutSelection(bview);
       }
}


/* -------> Kill to end of line. */
void LyXText::deleteLineForward(BufferView * bview)
{
        if (!cursor.par()->size())
                // Paragraph is empty, so we just go to the right
                cursorRight(bview);
        else {
                LyXCursor tmpcursor = cursor;
                // We can't store the row over a regular setCursor
                // so we set it to 0 and reset it afterwards.
                tmpcursor.row(0); // ??
                selection.set(true); // to avoid deletion
                cursorEnd(bview);
                setCursor(bview, tmpcursor, tmpcursor.par(), tmpcursor.pos());
                selection.cursor = cursor;
                cursor = tmpcursor;
                setSelection(bview);
                // What is this test for ??? (JMarc)
                if (!selection.set()) {
                        deleteWordForward(bview);
                } else {
                        cutSelection(bview);
                }
        }
}


// Change the case of a word at cursor position. 
// This function directly manipulates Paragraph::text because there
// is no Paragraph::SetChar currently. I did what I could to ensure
// that it is correct. I guess part of it should be moved to
// Paragraph, but it will have to change for 1.1 anyway. At least
// it does not access outside of the allocated array as the older
// version did. (JMarc) 
void LyXText::changeCase(BufferView * bview, LyXText::TextCase action)
{
        LyXCursor from;
        LyXCursor to;

        if (selection.set()) {
                from = selection.start;
                to = selection.end;
        } else {
                getWord(from, to, PARTIAL_WORD);
                setCursor(bview, to.par(), to.pos() + 1);
        }

        changeRegionCase(bview, from, to, action);
}


void LyXText::changeRegionCase(BufferView * bview,
                               LyXCursor const & from,
                               LyXCursor const & to,
                               LyXText::TextCase action)
{
        lyx::Assert(from <= to);
        
        setUndo(bview, Undo::FINISH,
                from.par(), to.par()->next());

        Paragraph::size_type pos = from.pos();
        Paragraph * par = from.par();

        while (par && (pos != to.pos() || par != to.par())) {
                unsigned char c = par->getChar(pos);
                if (!IsInsetChar(c) && !IsHfillChar(c)) {
                        switch (action) {
                        case text_lowercase:
                                c = tolower(c);
                                break;
                        case text_capitalization:
                                c = toupper(c);
                                action = text_lowercase;
                                break;
                        case text_uppercase:
                                c = toupper(c);
                                break;
                        }
                }
                par->setChar(pos, c);
                checkParagraph(bview, par, pos);

                ++pos;
                if (pos == par->size()) {
                        par = par->next();
                        pos = 0;
                }
        }
        if (to.row() != from.row()) {
                refresh_y = from.y() - from.row()->baseline();
                refresh_row = from.row();
                status(bview, LyXText::NEED_MORE_REFRESH);
        }
}


void LyXText::transposeChars(BufferView & bview)
{
        Paragraph * tmppar = cursor.par();

        setUndo(&bview, Undo::FINISH,
                tmppar, tmppar->next()); 

        Paragraph::size_type tmppos = cursor.pos();

        // First decide if it is possible to transpose at all

        // We are at the beginning of a paragraph.
        if (tmppos == 0) return;

        // We are at the end of a paragraph.
        if (tmppos == tmppar->size() - 1) return;

        unsigned char c1 = tmppar->getChar(tmppos);
        unsigned char c2 = tmppar->getChar(tmppos - 1);

        if (c1 != Paragraph::META_INSET
            && c2 != Paragraph::META_INSET) {
                tmppar->setChar(tmppos, c2);
                tmppar->setChar(tmppos - 1, c1);
        }
        // We should have an implementation that handles insets
        // as well, but that will have to come later. (Lgb)
        checkParagraph(const_cast<BufferView*>(&bview), tmppar, tmppos);
}


void LyXText::Delete(BufferView * bview)
{
        // this is a very easy implementation

        LyXCursor old_cursor = cursor;
        int const old_cur_par_id = old_cursor.par()->id();
        int const old_cur_par_prev_id = old_cursor.par()->previous() ?
                old_cursor.par()->previous()->id() : 0;
        
        // just move to the right
        cursorRight(bview);

        // CHECK Look at the comment here.
        // This check is not very good...
        // The cursorRightIntern calls DeleteEmptyParagrapgMechanism
        // and that can very well delete the par or par->previous in
        // old_cursor. Will a solution where we compare paragraph id's
        //work better?
        if ((cursor.par()->previous() ? cursor.par()->previous()->id() : 0)
            == old_cur_par_prev_id
            && cursor.par()->id() != old_cur_par_id)
                return; // delete-empty-paragraph-mechanism has done it

        // if you had success make a backspace
        if (old_cursor.par() != cursor.par() || old_cursor.pos() != cursor.pos()) {
                LyXCursor tmpcursor = cursor;
                cursor = old_cursor; // to make sure undo gets the right cursor position
                setUndo(bview, Undo::DELETE,
                        cursor.par(), cursor.par()->next()); 
                cursor = tmpcursor;
                backspace(bview);
        }
}


void LyXText::backspace(BufferView * bview)
{
        // Get the font that is used to calculate the baselineskip
        Paragraph::size_type lastpos = cursor.par()->size();
        LyXFont rawparfont =
                cursor.par()->getFontSettings(bview->buffer()->params,
                                              lastpos - 1);

        if (cursor.pos() == 0) {
                // The cursor is at the beginning of a paragraph,
                // so the the backspace will collapse two paragraphs into one.
                
                // we may paste some paragraphs
      
                // is it an empty paragraph?
      
                if ((lastpos == 0
                     || (lastpos == 1 && cursor.par()->isSeparator(0)))) {
                        // This is an empty paragraph and we delete it just by moving the cursor one step
                        // left and let the DeleteEmptyParagraphMechanism handle the actual deletion
                        // of the paragraph.
                        
                        if (cursor.par()->previous()) {
                                Paragraph * tmppar = cursor.par()->previous();
                                if (cursor.par()->getLayout() == tmppar->getLayout()
                                    && cursor.par()->getAlign() == tmppar->getAlign()) {
                                        // Inherit bottom DTD from the paragraph below.
                                        // (the one we are deleting)
                                        tmppar->params().lineBottom(cursor.par()->params().lineBottom());
                                        tmppar->params().spaceBottom(cursor.par()->params().spaceBottom());
                                        tmppar->params().pagebreakBottom(cursor.par()->params().pagebreakBottom());
                                }
                                
                                cursorLeft(bview);
                     
                                // the layout things can change the height of a row !
                                int const tmpheight = cursor.row()->height();
                                setHeightOfRow(bview, cursor.row());
                                if (cursor.row()->height() != tmpheight) {
                                        refresh_y = cursor.y() - cursor.row()->baseline();
                                        refresh_row = cursor.row();
                                        status(bview, LyXText::NEED_MORE_REFRESH);
                                }
                                return;
                        }
                }

                if (cursor.par()->previous()) {
                        setUndo(bview, Undo::DELETE,
                                cursor.par()->previous(),
                                cursor.par()->next());
                }
                
                Paragraph * tmppar = cursor.par();
                Row * tmprow = cursor.row();

                // We used to do cursorLeftIntern() here, but it is
                // not a good idea since it triggers the auto-delete
                // mechanism. So we do a cursorLeftIntern()-lite,
                // without the dreaded mechanism. (JMarc)
                if (cursor.par()->previous()) { 
                        // steps into the above paragraph.
                        setCursorIntern(bview, cursor.par()->previous(),
                                        cursor.par()->previous()->size(),
                                        false);
                }

                /* Pasting is not allowed, if the paragraphs have different
                   layout. I think it is a real bug of all other
                   word processors to allow it. It confuses the user.
                   Even so with a footnote paragraph and a non-footnote
                   paragraph. I will not allow pasting in this case, 
                   because the user would be confused if the footnote behaves 
                   different wether it is open or closed.
                  
                   Correction: Pasting is always allowed with standard-layout
                */
                if (cursor.par() != tmppar
                    && (cursor.par()->getLayout() == tmppar->getLayout()
                        || tmppar->getLayout() == 0 /*standard*/)
                    && cursor.par()->getAlign() == tmppar->getAlign()) {

                        removeParagraph(tmprow);
                        removeRow(tmprow);
                        cursor.par()->pasteParagraph(bview->buffer()->params);
                        
                        if (!cursor.pos() || !cursor.par()->isSeparator(cursor.pos() - 1))
                                ; //cursor.par()->insertChar(cursor.pos(), ' ');
                        // strangely enough it seems that commenting out the line above removes
                        // most or all of the segfaults. I will however also try to move the
                        // two Remove... lines in front of the PasteParagraph too.
                        else
                                if (cursor.pos())
                                        cursor.pos(cursor.pos() - 1);
                        
                        status(bview, LyXText::NEED_MORE_REFRESH);
                        refresh_row = cursor.row();
                        refresh_y = cursor.y() - cursor.row()->baseline();
                        
                        // remove the lost paragraph
                        // This one is not safe, since the paragraph that the tmprow and the
                        // following rows belong to has been deleted by the PasteParagraph
                        // above. The question is... could this be moved in front of the
                        // PasteParagraph?
                        //RemoveParagraph(tmprow);
                        //RemoveRow(tmprow);  
                        
                        // This rebuilds the rows.
                        appendParagraph(bview, cursor.row());
                        updateCounters(bview, cursor.row());
                        
                        // the row may have changed, block, hfills etc.
                        setCursor(bview, cursor.par(), cursor.pos(), false);
                }
        } else {
                /* this is the code for a normal backspace, not pasting
                 * any paragraphs */ 
                setUndo(bview, Undo::DELETE,
                        cursor.par(), cursor.par()->next()); 
                // We used to do cursorLeftIntern() here, but it is
                // not a good idea since it triggers the auto-delete
                // mechanism. So we do a cursorLeftIntern()-lite,
                // without the dreaded mechanism. (JMarc)
                setCursorIntern(bview, cursor.par(), cursor.pos()- 1,
                                false, cursor.boundary());
                
                // some insets are undeletable here
                if (cursor.par()->getChar(cursor.pos()) == Paragraph::META_INSET) {
                        if (!cursor.par()->getInset(cursor.pos())->deletable())
                                return; 
                        // force complete redo when erasing display insets
                        // this is a cruel method but safe..... Matthias 
                        if (cursor.par()->getInset(cursor.pos())->display() ||
                            cursor.par()->getInset(cursor.pos())->needFullRow()) {
                                cursor.par()->erase(cursor.pos());
                                redoParagraph(bview);
                                return;
                        }
                }
                
                Row * row = cursor.row();
                int y = cursor.y() - row->baseline();
                Paragraph::size_type z;
                /* remember that a space at the end of a row doesnt count
                 * when calculating the fill */ 
                if (cursor.pos() < rowLast(row) ||
                    !cursor.par()->isLineSeparator(cursor.pos())) {
                        row->fill(row->fill() + singleWidth(bview,
                                                            cursor.par(),
                                                            cursor.pos()));
                }
                
                /* some special code when deleting a newline. This is similar
                 * to the behavior when pasting paragraphs */ 
                if (cursor.pos() && cursor.par()->isNewline(cursor.pos())) {
                        cursor.par()->erase(cursor.pos());
                        // refresh the positions
                        Row * tmprow = row;
                        while (tmprow->next() && tmprow->next()->par() == row->par()) {
                                tmprow = tmprow->next();
                                tmprow->pos(tmprow->pos() - 1);
                        }
                        if (cursor.par()->isLineSeparator(cursor.pos() - 1))
                                cursor.pos(cursor.pos() - 1);

                        if (cursor.pos() < cursor.par()->size()
                            && !cursor.par()->isSeparator(cursor.pos())) {
                                cursor.par()->insertChar(cursor.pos(), ' ');
                                setCharFont(bview->buffer(), cursor.par(), 
                                            cursor.pos(), current_font);
                                // refresh the positions
                                tmprow = row;
                                while (tmprow->next() && tmprow->next()->par() == row->par()) {
                                        tmprow = tmprow->next();
                                        tmprow->pos(tmprow->pos() + 1);
                                }
                        }
                } else {
                        cursor.par()->erase(cursor.pos());
                        
                        // refresh the positions
                        Row * tmprow = row;
                        while (tmprow->next()
                               && tmprow->next()->par() == row->par()) {
                                tmprow = tmprow->next();
                                tmprow->pos(tmprow->pos() - 1);
                        }

                        // delete newlines at the beginning of paragraphs
                        while (cursor.par()->size() &&
                               cursor.par()->isNewline(cursor.pos()) &&
                               cursor.pos() == beginningOfMainBody(bview->buffer(),
                                                                   cursor.par())) {
                                cursor.par()->erase(cursor.pos());
                                // refresh the positions
                                tmprow = row;
                                while (tmprow->next() && 
                                       tmprow->next()->par() == row->par()) {
                                        tmprow = tmprow->next();
                                        tmprow->pos(tmprow->pos() - 1);
                                }
                        }
                }
                
                // is there a break one row above
                if (row->previous() && row->previous()->par() == row->par()) {
                        z = nextBreakPoint(bview, row->previous(),
                                           workWidth(bview));
                        if (z >= row->pos()) {
                                row->pos(z + 1);
                                
                                Row * tmprow = row->previous();
                                
                                // maybe the current row is now empty
                                if (row->pos() >= row->par()->size()) {
                                        // remove it
                                        removeRow(row);
                                        need_break_row = 0;
                                } else {
                                        breakAgainOneRow(bview, row);
                                        if (row->next() && row->next()->par() == row->par())
                                                need_break_row = row->next();
                                        else
                                                need_break_row = 0;
                                }
                                
                                // set the dimensions of the row above
                                y -= tmprow->height();
                                tmprow->fill(fill(bview, tmprow,
                                                  workWidth(bview)));
                                setHeightOfRow(bview, tmprow);
                                
                                refresh_y = y;
                                refresh_row = tmprow;
                                status(bview, LyXText::NEED_MORE_REFRESH);
                                setCursor(bview, cursor.par(), cursor.pos(),
                                          false, cursor.boundary());
                                //current_font = rawtmpfont;
                                //real_current_font = realtmpfont;
                                // check, whether the last character's font has changed.
                                if (rawparfont !=
                                    cursor.par()->getFontSettings(bview->buffer()->params,
                                                                  cursor.par()->size() - 1))
                                        redoHeightOfParagraph(bview, cursor);
                                return;
                        }
                }
                
                // break the cursor row again
                if (row->next() && row->next()->par() == row->par() &&
                    (rowLast(row) == row->par()->size() - 1 ||
                     nextBreakPoint(bview, row, workWidth(bview)) != rowLast(row))) {
                        
                        /* it can happen that a paragraph loses one row
                         * without a real breakup. This is when a word
                         * is to long to be broken. Well, I don t care this 
                         * hack ;-) */
                        if (rowLast(row) == row->par()->size() - 1)
                                removeRow(row->next());
                        
                        refresh_y = y;
                        refresh_row = row;
                        status(bview, LyXText::NEED_MORE_REFRESH);
                        
                        breakAgainOneRow(bview, row);
                        // will the cursor be in another row now?
                        if (row->next() && row->next()->par() == row->par() &&
                            rowLast(row) <= cursor.pos()) {
                                row = row->next();
                                breakAgainOneRow(bview, row);
                        }

                        setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());

                        if (row->next() && row->next()->par() == row->par())
                                need_break_row = row->next();
                        else
                                need_break_row = 0;
                } else  {
                        // set the dimensions of the row
                        row->fill(fill(bview, row, workWidth(bview)));
                        int const tmpheight = row->height();
                        setHeightOfRow(bview, row);
                        if (tmpheight == row->height())
                                status(bview, LyXText::NEED_VERY_LITTLE_REFRESH);
                        else
                                status(bview, LyXText::NEED_MORE_REFRESH);
                        refresh_y = y;
                        refresh_row = row;
                        setCursor(bview, cursor.par(), cursor.pos(), false, cursor.boundary());
                }
        }

        // current_font = rawtmpfont;
        // real_current_font = realtmpfont;

        if (isBoundary(bview->buffer(), cursor.par(), cursor.pos())
            != cursor.boundary())
                setCursor(bview, cursor.par(), cursor.pos(), false,
                          !cursor.boundary());

        lastpos = cursor.par()->size();
        if (cursor.pos() == lastpos)
                setCurrentFont(bview);
        
        // check, whether the last characters font has changed.
        if (rawparfont != 
            cursor.par()->getFontSettings(bview->buffer()->params, lastpos - 1)) {
                redoHeightOfParagraph(bview, cursor);
        } else {
                // now the special right address boxes
                if (textclasslist.Style(bview->buffer()->params.textclass,
                                        cursor.par()->getLayout()).margintype == MARGIN_RIGHT_ADDRESS_BOX) {
                        redoDrawingOfParagraph(bview, cursor); 
                }
        }
}


void LyXText::getVisibleRow(BufferView * bview, int y_offset, int x_offset,
                            Row * row_ptr, int y, bool cleared)
{
        // returns a printed row
        Painter & pain = bview->painter();
        
        bool const is_rtl =
                row_ptr->par()->isRightToLeftPar(bview->buffer()->params);
        
        Paragraph::size_type const last = rowLastPrintable(row_ptr);

        Paragraph::size_type vpos;
        Paragraph::size_type pos;

        float tmpx;

        LyXFont font(LyXFont::ALL_SANE);
        int maxdesc;
        if (row_ptr->height() <= 0) {
                lyxerr << "LYX_ERROR: row.height: "
                       << row_ptr->height() << endl;
                return;
        }

        float x;
        float fill_separator;
        float fill_hfill;
        float fill_label_hfill;
        prepareToPrint(bview, row_ptr, x, fill_separator,
                       fill_hfill, fill_label_hfill);
        
        if (inset_owner && (x < 0))
                x = 0;
        x += x_offset;
        
        // clear the area where we want to paint/print
        int const ww = bview->workWidth();

        bool clear_area = true;
        Inset * inset = 0;

        if (!bview->screen()->forceClear() && last == row_ptr->pos()
            && row_ptr->par()->getChar(row_ptr->pos()) == Paragraph::META_INSET
            && (inset = row_ptr->par()->getInset(row_ptr->pos()))) {
                clear_area = inset->doClearArea();
        }
        // we don't need to clear it's already done!!!
        if (cleared) {
                clear_area = true;
        } else if (clear_area) {
#ifdef WITH_WARNINGS
#warning Should be fixed with a lyxinset::clear_width(bv, font) function! (Jug)
#warning Should we not fix this in the Painter, please have a look Lars! (Jug)
#endif
                int const y = y_offset < 0 ? 0 : y_offset;
                int const h = y_offset < 0 ?
                        row_ptr->height() + y_offset : row_ptr->height();
                int const w = inset_owner ?
                        inset_owner->width(bview, font) - 2 : ww;
                int const x = x_offset;
                pain.fillRectangle(x, y, w, h);
        } else if (inset != 0) {
                int h = row_ptr->baseline() - inset->ascent(bview, font);
                if (h > 0) {
                        int const w = (inset_owner ?
                                 inset_owner->width(bview, font) : ww);
                        pain.fillRectangle(x_offset, y_offset, w, h);
                }
                h += inset->ascent(bview, font) + inset->descent(bview, font);
                if ((row_ptr->height() - h) > 0) {
                        int const w = (inset_owner ?
                                 inset_owner->width(bview, font) : ww);
                        pain.fillRectangle(x_offset, y_offset + h,
                                           w, row_ptr->height() - h);
                }
                if (!inset_owner && !inset->display() && !inset->needFullRow())
                {
                        int const w = inset->width(bview, font) + int(x);
                        pain.fillRectangle(w, y_offset, ww - w, row_ptr->height());
                }
        }

        if (selection.set()) {
                int const w = (inset_owner ?
                               inset_owner->width(bview, font) : ww);
                // selection code
                if (bidi_same_direction) {
                        if (selection.start.row() == row_ptr &&
                            selection.end.row() == row_ptr) {
                                if (selection.start.x() < selection.end.x())
                                        pain.fillRectangle(x_offset + selection.start.x(),
                                                           y_offset,
                                                           selection.end.x() - selection.start.x(),
                                                           row_ptr->height(),
                                                           LColor::selection);
                                else
                                        pain.fillRectangle(x_offset + selection.end.x(),
                                                           y_offset,
                                                           selection.start.x() - selection.end.x(),
                                                           row_ptr->height(),
                                                           LColor::selection);
                        } else if (selection.start.row() == row_ptr) {
                                if (is_rtl)
                                        pain.fillRectangle(x_offset, y_offset,
                                                           selection.start.x(),
                                                           row_ptr->height(),
                                                           LColor::selection);
                                else
                                        pain.fillRectangle(x_offset + selection.start.x(),
                                                           y_offset,
                                                           w - selection.start.x(),
                                                           row_ptr->height(),
                                                           LColor::selection);
                        } else if (selection.end.row() == row_ptr) {
                                if (is_rtl)
                                        pain.fillRectangle(x_offset + selection.end.x(),
                                                           y_offset,
                                                           w - selection.end.x(),
                                                           row_ptr->height(),
                                                           LColor::selection);
                                else
                                        pain.fillRectangle(x_offset, y_offset,
                                                           selection.end.x(),
                                                           row_ptr->height(),
                                                           LColor::selection);
                        } else if (y > selection.start.y()
                                   && y < selection.end.y()) {
                                pain.fillRectangle(x_offset, y_offset, w,
                                                   row_ptr->height(),
                                                   LColor::selection);
                        }
                } else if (selection.start.row() != row_ptr &&
                            selection.end.row() != row_ptr &&
                            y > selection.start.y()
                            && y < selection.end.y()) {
                        pain.fillRectangle(x_offset, y_offset, w,
                                           row_ptr->height(),
                                           LColor::selection);
                } else if (selection.start.row() == row_ptr ||
                           selection.end.row() == row_ptr) {
                        float tmpx = x;
                        if ((selection.start.row() != row_ptr && !is_rtl) ||
                             (selection.end.row() != row_ptr && is_rtl))
                                pain.fillRectangle(x_offset, y_offset,
                                                   int(tmpx),
                                                   row_ptr->height(),
                                                   LColor::selection);
                        Paragraph::size_type main_body =
                                beginningOfMainBody(bview->buffer(),
                                                    row_ptr->par());
                        
                        for (vpos = row_ptr->pos(); vpos <= last; ++vpos)  {
                                pos = vis2log(vpos);
                                float const old_tmpx = tmpx;
                                if (main_body > 0 && pos == main_body-1) {
                                        tmpx += fill_label_hfill +
                                                lyxfont::width(textclasslist.Style(bview->buffer()->params.textclass,
                                                                                   row_ptr->par()->getLayout()).labelsep,
                                                               getFont(bview->buffer(),row_ptr->par(), -2));
                                        if (row_ptr->par()->isLineSeparator(main_body-1))
                                                tmpx -= singleWidth(bview, row_ptr->par(), main_body-1);
                                }
                                if (hfillExpansion(bview->buffer(), row_ptr, pos)) {
                                        tmpx += singleWidth(bview, row_ptr->par(), pos);
                                        if (pos >= main_body)
                                                tmpx += fill_hfill;
                                        else 
                                                tmpx += fill_label_hfill;
                                }
                                else if (row_ptr->par()->isSeparator(pos)) {
                                        tmpx += singleWidth(bview, row_ptr->par(), pos);
                                        if (pos >= main_body)
                                                tmpx += fill_separator;
                                } else
                                        tmpx += singleWidth(bview, row_ptr->par(), pos);
                                
                                if ((selection.start.row() != row_ptr ||
                                      selection.start.pos() <= pos) &&
                                     (selection.end.row() != row_ptr ||
                                      pos < selection.end.pos()) )
                                        // Here we do not use x_offset as x_offset was
                                        // added to x.
                                        pain.fillRectangle(int(old_tmpx),
                                                           y_offset,
                                                           int(tmpx - old_tmpx + 1),
                                                           row_ptr->height(),
                                                           LColor::selection);
                        }

                        if ((selection.start.row() != row_ptr && is_rtl) ||
                             (selection.end.row() != row_ptr && !is_rtl) )
                                pain.fillRectangle(x_offset + int(tmpx),
                                                   y_offset,
                                                   int(ww - tmpx),
                                                   row_ptr->height(),
                                                   LColor::selection);
                }
        }

        int box_x = 0;

        // Draw appendix lines
        Paragraph * firstpar = row_ptr->par();

        if (firstpar->params().appendix()) {
                pain.line(1, y_offset,
                          1, y_offset + row_ptr->height(),
                          LColor::appendixline);
                pain.line(ww - 2, y_offset,
                          ww - 2, y_offset + row_ptr->height(),
                          LColor::appendixline);
        }

        // Draw depth lines
        Paragraph::depth_type const depth = firstpar->getDepth();
        if (depth > 0) {
                Paragraph::depth_type next_depth = 0;
                Paragraph::depth_type prev_depth = 0;
                if (row_ptr->next())
                                next_depth = row_ptr->next()->par()->getDepth();
                if (row_ptr->previous())
                                prev_depth = row_ptr->previous()->par()->getDepth();

                for (Paragraph::depth_type i = 1; i <= depth; ++i) {
                        int const line_x = (LYX_PAPER_MARGIN / 5) *
                                i + box_x + x_offset;
                        pain.line(line_x, y_offset, line_x,
                                  y_offset + row_ptr->height() - 1 - (i - next_depth - 1) * 3,
                                  LColor::depthbar);
                
                        if (i > prev_depth)
                                pain.fillRectangle(line_x, y_offset, LYX_PAPER_MARGIN / 5, 2,
                                                   LColor::depthbar);
                        if (i > next_depth)
                                pain.fillRectangle(line_x,
                                                   y_offset + row_ptr->height() - 2 - (i - next_depth - 1) * 3,
                                                   LYX_PAPER_MARGIN / 5, 2,
                                                   LColor::depthbar);
                }
        }

        
        LyXLayout const & layout =
                textclasslist.Style(bview->buffer()->params.textclass,
                                    row_ptr->par()->getLayout());

        int y_top = 0;
        int y_bottom = row_ptr->height();
        
        // is it a first row?
        if (!row_ptr->pos() && (row_ptr->par() == firstpar)) {
                
                // start of appendix?
                if (row_ptr->par()->params().startOfAppendix()) {
                        pain.line(1, y_offset,
                                  ww - 2, y_offset,
                                  LColor::appendixline);
                }
                
                // think about the margins
                if (!row_ptr->previous() && bv_owner)
                        y_top += LYX_PAPER_MARGIN;
                
                // draw a top pagebreak
                if (row_ptr->par()->params().pagebreakTop()) {
                        LyXFont pb_font;
                        pb_font.setColor(LColor::pagebreak).decSize();
                        int w = 0;
                        int a = 0;
                        int d = 0;
                        pain.line(0, y_offset + y_top + 2*defaultHeight(),
                                  ww, 
                                  y_offset + y_top + 2 * defaultHeight(),
                                  LColor::pagebreak, 
                                  Painter::line_onoffdash)
                                .rectText(0,
                                          0,
                                          _("Page Break (top)"),
                                          pb_font,
                                          LColor::background,
                                          LColor::background, false, w, a, d);
                        pain.rectText((ww - w)/2,
                                      y_offset + y_top + 2 * defaultHeight() + d,
                                      _("Page Break (top)"),
                                      pb_font,
                                      LColor::background,
                                      LColor::background);
                        y_top += 3 * defaultHeight();
                }
                
                if (row_ptr->par()->params().spaceTop().kind() == VSpace::VFILL) {
                        // draw a vfill top
                        pain.line(0, y_offset + 2 + y_top,
                                  LYX_PAPER_MARGIN, y_offset + 2 + y_top,
                                  LColor::vfillline);
                        
                        pain.line(0, y_offset + y_top + 3 * defaultHeight(),
                                  LYX_PAPER_MARGIN,
                                  y_offset + y_top + 3 * defaultHeight(),
                                  LColor::vfillline);
                        
                        pain.line(LYX_PAPER_MARGIN / 2, y_offset + 2 + y_top,
                                  LYX_PAPER_MARGIN / 2,
                                  y_offset + y_top + 3 * defaultHeight(),
                                  LColor::vfillline);
                        
                        y_top += 3 * defaultHeight();
                }
                
                // think about user added space
                y_top += int(row_ptr->par()->params().spaceTop().inPixels(bview));
                
                // think about the parskip
                // some parskips VERY EASY IMPLEMENTATION
                if (bview->buffer()->params.paragraph_separation == BufferParams::PARSEP_SKIP) {
                        if (layout.latextype == LATEX_PARAGRAPH
                            && firstpar->getDepth() == 0
                            && firstpar->previous())
                                y_top += bview->buffer()->params.getDefSkip().inPixels(bview);
                        else if (firstpar->previous()
                                 && textclasslist.Style(bview->buffer()->params.textclass,
                                                        firstpar->previous()->getLayout()).latextype == LATEX_PARAGRAPH
                                 && firstpar->previous()->getDepth() == 0)
                                // is it right to use defskip here, too? (AS) 
                                y_top += bview->buffer()->params.getDefSkip().inPixels(bview);
                }
                
                if (row_ptr->par()->params().lineTop()) {
                        // draw a top line
                        y_top +=  lyxfont::ascent('x',
                                                  getFont(bview->buffer(),
                                                          row_ptr->par(), 0));
                        int const w = (inset_owner ?
                                       inset_owner->width(bview, font) : ww);
                        int const xp = static_cast<int>(inset_owner ? x : 0);
                        pain.line(xp, y_offset + y_top,
                                  w, y_offset + y_top,
                                  LColor::topline,
                                  Painter::line_solid,
                                  Painter::line_thick);
                        
                        y_top +=  lyxfont::ascent('x',getFont(bview->buffer(),
                                                              row_ptr->par(), 0));
                }
                
                // should we print a label?
                if (layout.labeltype >= LABEL_STATIC
                    && (layout.labeltype != LABEL_STATIC
                        || layout.latextype != LATEX_ENVIRONMENT
                        || row_ptr->par()->isFirstInSequence())) {
                        font = getFont(bview->buffer(), row_ptr->par(), -2);
                        if (!row_ptr->par()->getLabelstring().empty()) {
                                tmpx = x;
                                string const tmpstring =
                                        row_ptr->par()->getLabelstring();
                                
                                if (layout.labeltype == LABEL_COUNTER_CHAPTER) {
                                        if (bview->buffer()->params.secnumdepth >= 0) {
                                                // this is special code for
                                                // the chapter layout. This is
                                                // printed in an extra row
                                                // and has a pagebreak at
                                                // the top.
                                                float spacing_val = 1.0;
                                                if (!row_ptr->par()->params().spacing().isDefault()) {
                                                        spacing_val = row_ptr->par()->params().spacing().getValue();
                                                } else {
                                                        spacing_val = bview->buffer()->params.spacing.getValue();
                                                }
   
                                                maxdesc = int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val)
                                                        + int(layout.parsep) * defaultHeight();
                                                if (is_rtl)
                                                        tmpx = ww - leftMargin(bview, row_ptr) - 
                                                                lyxfont::width(tmpstring, font);
                                                pain.text(int(tmpx),
                                                          y_offset + row_ptr->baseline() - row_ptr->ascent_of_text() - maxdesc,
                                                          tmpstring, font);
                                        }
                                } else {
                                        if (is_rtl) {
                                                tmpx = ww - leftMargin(bview, row_ptr)
                                                        + lyxfont::width(layout.labelsep, font);
                                        } else
                                                tmpx = x - lyxfont::width(layout.labelsep, font)
                                                        - lyxfont::width(tmpstring, font);

                                        // draw it!
                                        pain.text(int(tmpx),
                                                  y_offset + row_ptr->baseline(),
                                                  tmpstring, font);
                                }
                        }
                        // the labels at the top of an environment.
                        // More or less for bibliography
                } else if (layout.labeltype == LABEL_TOP_ENVIRONMENT ||
                           layout.labeltype == LABEL_BIBLIO ||
                           layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT) {
                        if (row_ptr->par()->isFirstInSequence()) {
                                font = getFont(bview->buffer(),
                                               row_ptr->par(), -2);
                                if (!row_ptr->par()->getLabelstring().empty()) {
                                        string const tmpstring =
                                                row_ptr->par()->getLabelstring();
                                        float spacing_val = 1.0;
                                        if (!row_ptr->par()->params().spacing().isDefault()) {
                                                spacing_val = row_ptr->par()->params().spacing().getValue();
                                        } else {
                                                spacing_val = bview->buffer()->params.spacing.getValue();
                                        }
   
                                        maxdesc = int(lyxfont::maxDescent(font) * layout.spacing.getValue() * spacing_val
                                                      + (layout.labelbottomsep * defaultHeight()));
                                        
                                        tmpx = x;
                                        if (layout.labeltype == LABEL_CENTERED_TOP_ENVIRONMENT){
                                                tmpx = ( (is_rtl ? leftMargin(bview, row_ptr) : x)
                                                         + ww - rightMargin(bview->buffer(), row_ptr) ) / 2; 
                                                tmpx -= lyxfont::width(tmpstring, font) / 2;
                                        } else if (is_rtl)
                                                tmpx = ww - leftMargin(bview, row_ptr) - 
                                                        lyxfont::width(tmpstring, font);
                                        pain.text(int(tmpx),
                                                  y_offset + row_ptr->baseline()
                                                  - row_ptr->ascent_of_text()
                                                  - maxdesc,
                                                  tmpstring, font);
                                }
                        }
                }
                if (layout.labeltype == LABEL_BIBLIO && row_ptr->par()->bibkey) {
                        font = getFont(bview->buffer(), row_ptr->par(), -1);
                        if (is_rtl)
                                tmpx = ww - leftMargin(bview, row_ptr)
                                        + lyxfont::width(layout.labelsep, font);
                        else
                                tmpx = x - lyxfont::width(layout.labelsep, font)
                                        - row_ptr->par()->bibkey->width(bview, font);
                        row_ptr->par()->bibkey->draw(bview, font,
                                                   y_offset + row_ptr->baseline(), 
                                                   tmpx, clear_area);
                }
        }
        
        // is it a last row?
        Paragraph * par = row_ptr->par();
        if (row_ptr->par() == par
            && (!row_ptr->next() || row_ptr->next()->par() != row_ptr->par())) {
                // think about the margins
                if (!row_ptr->next() && bv_owner)
                        y_bottom -= LYX_PAPER_MARGIN;
                
                // draw a bottom pagebreak
                if (firstpar->params().pagebreakBottom()) {
                        LyXFont pb_font;
                        pb_font.setColor(LColor::pagebreak).decSize();
                        int const y_place = y_offset + y_bottom
                                - 2 * defaultHeight();
                        
                        int w = 0;
                        int a = 0;
                        int d = 0;
                        pain
                                .line(0, y_place, ww, y_place,
                                      LColor::pagebreak,
                                      Painter::line_onoffdash)
                                .rectText(0, 0,
                                          _("Page Break (bottom)"),
                                          pb_font,
                                          LColor::background,
                                          LColor::background, false, w, a, d);
                        pain.rectText((ww - w) / 2, y_place + d,
                                      _("Page Break (bottom)"),
                                      pb_font,
                                      LColor::background,
                                      LColor::background);
                        y_bottom -= 3 * defaultHeight();
                }
                
                if (firstpar->params().spaceBottom().kind() == VSpace::VFILL) {
                        // draw a vfill bottom
                        int const y_place = y_offset + y_bottom
                                - 3 * defaultHeight();
                        
                        pain.line(0, y_place,
                                  LYX_PAPER_MARGIN, y_place,
                                  LColor::vfillline);
                        pain.line(0, y_offset + y_bottom - 2,
                                  LYX_PAPER_MARGIN,
                                  y_offset + y_bottom - 2,
                                  LColor::vfillline);
                        pain.line(LYX_PAPER_MARGIN / 2,
                                  y_place,
                                  LYX_PAPER_MARGIN / 2,
                                  y_offset + y_bottom - 2,
                                  LColor::vfillline);
                        y_bottom -= 3 * defaultHeight();
                }
                
                // think about user added space
                y_bottom -= int(firstpar->params().spaceBottom().inPixels(bview));
                
                if (firstpar->params().lineBottom()) {
                        // draw a bottom line
                        y_bottom -= lyxfont::ascent('x',
                                                    getFont(bview->buffer(),
                                                            par,
                                                            par->size() - 1));
                        int const w = (inset_owner ?
                                       inset_owner->width(bview, font) : ww);
                        int const xp = static_cast<int>(inset_owner ? x : 0);
                        pain.line(xp, y_offset + y_bottom,
                                  w, y_offset + y_bottom,
                                  LColor::topline, Painter::line_solid,
                                  Painter::line_thick);
                        y_bottom -= lyxfont::ascent('x',
                                                    getFont(bview->buffer(),
                                                            par,
                                                            par->size() - 1));
                }

                // draw an endlabel
                int const endlabel =
                        row_ptr->par()->getEndLabel(bview->buffer()->params);
                switch (endlabel) {
                case END_LABEL_BOX:
                case END_LABEL_FILLED_BOX:
                {
                        LyXFont const font = getFont(bview->buffer(),
                                                     row_ptr->par(), last);
                        int const size = int(0.75 * lyxfont::maxAscent(font));
                        int const y = (y_offset + row_ptr->baseline()) - size;
                        int x = is_rtl ? LYX_PAPER_MARGIN 
                                : ww - LYX_PAPER_MARGIN - size;

                        if (row_ptr->fill() <= size)
                                x += (size - row_ptr->fill() + 1) * (is_rtl ? -1 : 1);
                        if (endlabel == END_LABEL_BOX) {
                                pain.line(x, y, x, y + size,
                                          LColor::eolmarker);
                                pain.line(x + size, y, x + size , y + size,
                                          LColor::eolmarker);
                                pain.line(x, y, x + size, y,
                                          LColor::eolmarker);
                                pain.line(x, y + size, x + size, y + size,
                                          LColor::eolmarker);
                        } else
                                pain.fillRectangle(x, y, size, size,
                                                   LColor::eolmarker);
                        break;
                }
                case END_LABEL_STATIC:
                {
                        LyXTextClass::LayoutList::size_type layout = row_ptr->par()->getLayout();
                        string const tmpstring = textclasslist.
                                Style(bview->buffer()->params.textclass,
                                      layout).endlabelstring();
                        font = getFont(bview->buffer(), row_ptr->par(), -2);
                        int const tmpx = is_rtl ?
                                int(x) - lyxfont::width(tmpstring, font)
                                : ww - rightMargin(bview->buffer(), row_ptr) - row_ptr->fill();
                        pain.text( tmpx, y_offset + row_ptr->baseline(), tmpstring, font);
                        break;
                }
                case END_LABEL_NO_LABEL:
                        break;
                }
        }
        
        // draw the text in the pixmap
        
        vpos = row_ptr->pos();

        Paragraph::size_type main_body = 
                beginningOfMainBody(bview->buffer(), row_ptr->par());
        if (main_body > 0 &&
            (main_body-1 > last || 
             !row_ptr->par()->isLineSeparator(main_body - 1)))
                main_body = 0;
        
        while (vpos <= last)  {
                pos = vis2log(vpos);
                if (main_body > 0 && pos == main_body - 1) {
                        x += fill_label_hfill
                                + lyxfont::width(layout.labelsep,
                                                 getFont(bview->buffer(),
                                                         row_ptr->par(), -2))
                                - singleWidth(bview,
                                              row_ptr->par(),
                                              main_body - 1);
                }
                
                if (row_ptr->par() ->isHfill(pos)) {
                        x += 1;
                        pain.line(int(x),
                                  y_offset + row_ptr->baseline() - defaultHeight() / 2,
                                  int(x),
                                  y_offset + row_ptr->baseline(),
                                  LColor::vfillline);
                        
                        if (hfillExpansion(bview->buffer(),
                                           row_ptr, pos)) {
                                if (pos >= main_body) {
                                        pain.line(int(x),
                                                  y_offset + row_ptr->baseline() - defaultHeight() / 4,
                                                  int(x + fill_hfill),
                                                  y_offset + row_ptr->baseline() - defaultHeight() / 4,
                                                  LColor::vfillline,
                                                  Painter::line_onoffdash);
                                        x += fill_hfill;
                                } else {
                                        pain.line(int(x),
                                                  y_offset + row_ptr->baseline() - defaultHeight() / 4,
                                                  int(x + fill_label_hfill),
                                                  y_offset + row_ptr->baseline() - defaultHeight() / 4,
                                                  LColor::vfillline,
                                                  Painter::line_onoffdash);
                                        
                                        x += fill_label_hfill;
                                }
                                pain.line(int(x),
                                          y_offset + row_ptr->baseline() - defaultHeight() / 2,
                                          int(x),
                                          y_offset + row_ptr->baseline(),
                                          LColor::vfillline);
                        }
                        x += 2;
                        ++vpos;
                } else if (row_ptr->par()->isSeparator(pos)) {
                        x += singleWidth(bview,
                                         row_ptr->par(), pos);
                        if (pos >= main_body)
                                x += fill_separator;
                        ++vpos;
                } else
                        draw(bview, row_ptr, vpos, y_offset, x, clear_area);
        }
}


int LyXText::defaultHeight() const
{
        LyXFont font(LyXFont::ALL_SANE);
        return int(lyxfont::maxAscent(font) + lyxfont::maxDescent(font) * 1.5);
}

   
/* returns the column near the specified x-coordinate of the row 
* x is set to the real beginning of this column  */ 
int LyXText::getColumnNearX(BufferView * bview, Row * row, int & x,
                            bool & boundary) const
{
        float tmpx = 0.0;
        float fill_separator;
        float fill_hfill;
        float fill_label_hfill;
   
        prepareToPrint(bview, row, tmpx, fill_separator,
                       fill_hfill, fill_label_hfill);

        Paragraph::size_type vc = row->pos();
        Paragraph::size_type last = rowLastPrintable(row);
        Paragraph::size_type c = 0;
        LyXLayout const & layout =
                textclasslist.Style(bview->buffer()->params.textclass,
                                    row->par()->getLayout());
        bool left_side = false;

        Paragraph::size_type
                main_body = beginningOfMainBody(bview->buffer(), row->par());
        float last_tmpx = tmpx;
        
        if (main_body > 0 &&
            (main_body - 1 > last || 
             !row->par()->isLineSeparator(main_body - 1)))
                main_body = 0;
        
        while (vc <= last && tmpx <= x) {
                c = vis2log(vc);
                last_tmpx = tmpx;
                if (main_body > 0 && c == main_body-1) {
                        tmpx += fill_label_hfill +
                                lyxfont::width(layout.labelsep,
                                               getFont(bview->buffer(), row->par(), -2));
                        if (row->par()->isLineSeparator(main_body - 1))
                                tmpx -= singleWidth(bview, row->par(), main_body-1);
                }
                
                if (hfillExpansion(bview->buffer(), row, c)) {
                        x += singleWidth(bview, row->par(), c);
                        if (c >= main_body)
                                tmpx += fill_hfill;
                        else
                                tmpx += fill_label_hfill;
                }
                else if (row->par()->isSeparator(c)) {
                        tmpx += singleWidth(bview, row->par(), c);
                        if (c >= main_body)
                                tmpx+= fill_separator;
                } else
                        tmpx += singleWidth(bview, row->par(), c);
                ++vc;
        }
        
        if ((tmpx + last_tmpx) / 2 > x) {
                tmpx = last_tmpx;
                left_side = true;
        }

        if (vc > last + 1)  // This shouldn't happen.
                vc = last + 1;

        boundary = false;
        bool const lastrow = lyxrc.rtl_support // This is not needed, but gives
                                         // some speedup if rtl_support=false
                && (!row->next() || row->next()->par() != row->par());
        bool const rtl = (lastrow)
                ? row->par()->isRightToLeftPar(bview->buffer()->params)
                : false; // If lastrow is false, we don't need to compute
                         // the value of rtl.

        if (row->pos() > last)  // Row is empty?
                c = row->pos();
        else if (lastrow &&
                 ( ( rtl &&  left_side && vc == row->pos() && x < tmpx - 5) ||
                   (!rtl && !left_side && vc == last + 1   && x > tmpx + 5) ))
                c = last + 1;
        else if (vc == row->pos()) {
                c = vis2log(vc);
                if (bidi_level(c) % 2 == 1)
                        ++c;
        } else {
                c = vis2log(vc - 1);
                bool const rtl = (bidi_level(c) % 2 == 1);
                if (left_side == rtl) {
                        ++c;
                        boundary = isBoundary(bview->buffer(), row->par(), c);
                }
        }

        if (row->pos() <= last && c > last
            && row->par()->isNewline(last)) {
                if (bidi_level(last) % 2 == 0)
                        tmpx -= singleWidth(bview, row->par(), last);
                else
                        tmpx += singleWidth(bview, row->par(), last);
                c = last;
        }

        c -= row->pos();
        x = int(tmpx);
        return c;
}


// returns pointer to a specified row
Row * LyXText::getRow(Paragraph * par,
                      Paragraph::size_type pos, int & y) const
{
        if (!firstrow)
                return 0;
        
        Row * tmprow = firstrow;
        y = 0;
        
        // find the first row of the specified paragraph
        while (tmprow->next() && tmprow->par() != par) {
                y += tmprow->height();
                tmprow = tmprow->next();
        }
        
        // now find the wanted row
        while (tmprow->pos() < pos
               && tmprow->next()
               && tmprow->next()->par() == par
               && tmprow->next()->pos() <= pos) {
                y += tmprow->height();
                tmprow = tmprow->next();
        }
        
        return tmprow;
}