xref: /dports/www/gtkhtml4/gtkhtml-4.10.0/gtkhtml/htmlclueflow.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* This file is part of the GtkHTML library.
 *
 * Copyright (C) 1997 Martin Jones (mjones@kde.org)
 * Copyright (C) 1997 Torben Weis (weis@kde.org)
 * Copyright (C) 1999, 2000 Helix Code, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/

/* This is the object that defines a paragraph in the HTML document.  */

/* WARNING: it must always be the child of a clue.  */

#include <config.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>

#include "gtkhtml-properties.h"

#include "htmlcolor.h"
#include "htmlcolorset.h"
#include "htmlclue.h"
#include "htmlclueflow.h"
#include "htmlcluealigned.h"
#include "htmlentity.h"
#include "htmlengine-edit.h"
#include "htmlengine-save.h"
#include "htmlpainter.h"
#include "htmlplainpainter.h"
#include "htmlprinter.h"
#include "htmlsearch.h"
#include "htmlselection.h"
#include "htmlsettings.h"
#include "htmltable.h"
#include "htmltablecell.h"
#include "htmltext.h"
#include "htmltextslave.h"	/* FIXME */

HTMLClueFlowClass html_clueflow_class;
static HTMLClueClass *parent_class = NULL;

#define HCF_CLASS(x) HTML_CLUEFLOW_CLASS (HTML_OBJECT (x)->klass)

static gchar *        get_item_marker_str                   (HTMLClueFlow *flow, gboolean ascii_only);
static guint          get_post_padding                      (HTMLClueFlow *flow,
							     guint pad);
static gint            get_similar_depth                     (HTMLClueFlow *self,
							     HTMLClueFlow *neighbor);

static void
copy_levels (GByteArray *dst,
             GByteArray *src)
{
	gint i;

	g_byte_array_set_size (dst, src->len);

	for (i = 0; i < src->len; i++)
		dst->data[i] = src->data[i];
}

static gboolean
is_levels_equal (HTMLClueFlow *me,
                 HTMLClueFlow *you)
{
	if (!you)
		return FALSE;

	if (me->levels->len != you->levels->len)
		return FALSE;

	if (me->levels->len == 0)
		return TRUE;

	return !memcmp (me->levels->data, you->levels->data, you->levels->len);
}

static inline gboolean
is_item (HTMLClueFlow *flow)
{
	return flow && flow->style == HTML_CLUEFLOW_STYLE_LIST_ITEM;
}

static void
destroy (HTMLObject *self)
{
	HTMLClueFlow *flow = HTML_CLUEFLOW (self);

	g_byte_array_free (flow->levels, TRUE);
	if (flow->item_color) {
		html_color_unref (flow->item_color);
		flow->item_color = NULL;
	}

	(* HTML_OBJECT_CLASS (parent_class)->destroy) (self);
}

static void
copy (HTMLObject *self,
      HTMLObject *dest)
{
	(* HTML_OBJECT_CLASS (parent_class)->copy) (self, dest);

	HTML_CLUEFLOW (dest)->levels = html_clueflow_dup_levels (HTML_CLUEFLOW (self));
	HTML_CLUEFLOW (dest)->style = HTML_CLUEFLOW (self)->style;
	HTML_CLUEFLOW (dest)->item_type = HTML_CLUEFLOW (self)->item_type;
	HTML_CLUEFLOW (dest)->item_number = HTML_CLUEFLOW (self)->item_number;
	HTML_CLUEFLOW (dest)->clear = HTML_CLUEFLOW (self)->clear;
	HTML_CLUEFLOW (dest)->item_color = HTML_CLUEFLOW (self)->item_color;
	HTML_CLUEFLOW (dest)->indent_width = HTML_CLUEFLOW (self)->indent_width;
	HTML_CLUEFLOW (dest)->dir = HTML_CLUEFLOW (self)->dir;

	if (HTML_CLUEFLOW (dest)->item_color)
		html_color_ref (HTML_CLUEFLOW (dest)->item_color);
}

static inline gboolean
is_blockquote (HTMLListType type)
{
	if ((type == HTML_LIST_TYPE_BLOCKQUOTE_CITE)
	    || (type == HTML_LIST_TYPE_BLOCKQUOTE))
		return TRUE;

	return FALSE;
}

static inline gboolean
items_are_relative (HTMLObject *self,
                    HTMLObject *next_object)
{
	HTMLClueFlow *flow, *next;

	if (!self || !next_object)
		return FALSE;
	flow = HTML_CLUEFLOW (self);
	next = HTML_CLUEFLOW (next_object);

	if (!is_item (flow)
	    || !is_item (next)
	    || !is_levels_equal (flow, next)
	    || next->item_type != flow->item_type)
		return FALSE;

	return TRUE;
}

static HTMLObject *
get_prev_relative_item (HTMLObject *self)
{
	HTMLObject *prev;

	prev = self->prev;
	while (prev
	       && HTML_IS_CLUEFLOW (prev)
	       && (HTML_CLUEFLOW (prev)->levels->len > HTML_CLUEFLOW (self)->levels->len
		   || (HTML_CLUEFLOW (prev)->levels->len == HTML_CLUEFLOW (self)->levels->len
		       && !is_item (HTML_CLUEFLOW (prev))))
	       && !memcmp (HTML_CLUEFLOW (prev)->levels->data,
			   HTML_CLUEFLOW (self)->levels->data,
			   HTML_CLUEFLOW (self)->levels->len))

		prev = prev->prev;

	return prev;
}

static HTMLObject *
get_next_relative_item (HTMLObject *self)
{
	HTMLObject *next;

	next = self->next;
	while (next
	       && HTML_IS_CLUEFLOW (next)
	       && (HTML_CLUEFLOW (next)->levels->len > HTML_CLUEFLOW (self)->levels->len
		   || (HTML_CLUEFLOW (next)->levels->len == HTML_CLUEFLOW (self)->levels->len
		       && !is_item (HTML_CLUEFLOW (next))))
	       && !memcmp (HTML_CLUEFLOW (next)->levels->data,
			   HTML_CLUEFLOW (self)->levels->data,
			   HTML_CLUEFLOW (self)->levels->len))

		next = next->next;

	return next;
}

static void
update_item_number (HTMLObject *self,
                    HTMLEngine *e)
{
	HTMLObject *prev, *next;

	if (!self || !is_item (HTML_CLUEFLOW (self)))
		return;

	/* printf ("update_item_number\n"); */

	prev = get_prev_relative_item (self);
	if (items_are_relative (prev, self))
		HTML_CLUEFLOW (self)->item_number = HTML_CLUEFLOW (prev)->item_number + 1;
	else if (is_item (HTML_CLUEFLOW (self)))
		HTML_CLUEFLOW (self)->item_number = 1;
	html_engine_queue_draw (e, self);

	next = self;
	while ((next = get_next_relative_item (next)) && items_are_relative (self, next)) {
		HTML_CLUEFLOW (next)->item_number = HTML_CLUEFLOW (self)->item_number + 1;
		html_engine_queue_draw (e, next);
		self = next;
	}
}

static guint
get_recursive_length (HTMLObject *self)
{
	return (*HTML_OBJECT_CLASS (parent_class)->get_recursive_length) (self) + (self->next ? 1 : 0);
}

static gboolean
prev_flow_in_cluevs (HTMLObject *o)
{
	if (o->prev)
		return TRUE;

	o = o->parent;

	/* go up the tree to find cluev with prev */
	while (o && HTML_IS_CLUEV (o) && !o->prev)
		o = o->parent;

	/* go down the tree to find last clueflow */
	if (o && o->prev) {
		o = o->prev;

		while (o && HTML_IS_CLUEV (o))
			o = HTML_CLUE (o)->tail;

		if (o && HTML_IS_CLUEFLOW (o))
			return TRUE;
	}

	return FALSE;
}

static HTMLObject *
op_helper (HTMLObject *self,
           HTMLEngine *e,
           GList *from,
           GList *to,
           GList *left,
           GList *right,
           guint *len,
           gboolean cut)
{
	HTMLObject *o;

	/* if (!from && to && HTML_IS_TABLE (to->data) && to->next && GPOINTER_TO_INT (to->next->data) == 0)
		return NULL;
	if (!to && from && HTML_IS_TABLE (from->data) && from->next && GPOINTER_TO_INT (from->next->data) == 1)
		return NULL;
	if (!from && (*len || !(self->prev && HTML_IS_CLUEFLOW (self->prev) && HTML_IS_TABLE (HTML_CLUE (self->prev)->tail))))
	(*len) ++; */
	if (!from && prev_flow_in_cluevs (self)) {
		(*len) ++;
		/* if (cut)
		 * e->cursor->position--; */
	}
	if (cut)
		html_clue_remove_text_slaves (HTML_CLUE (self));
	o = cut
		? (*HTML_OBJECT_CLASS (parent_class)->op_cut) (self, e, from, to, left, right, len)
		: (*HTML_OBJECT_CLASS (parent_class)->op_copy) (self, NULL, e, from, to, len);

	if (!cut && o) {
		html_clue_remove_text_slaves (HTML_CLUE (o));
	}

	return o;
}

static HTMLObject *
op_copy (HTMLObject *self,
         HTMLObject *parent,
         HTMLEngine *e,
         GList *from,
         GList *to,
         guint *len)
{
	return op_helper (self, e, from, to, NULL, NULL, len, FALSE);
}

static HTMLObject *
op_cut (HTMLObject *self,
        HTMLEngine *e,
        GList *from,
        GList *to,
        GList *left,
        GList *right,
        guint *len)
{
	HTMLObject *rv, *prev, *next;

	prev = self->prev;
	next = self->next;

	rv = op_helper (self, e, from, to, left, right, len, TRUE);

	if (prev && from) {
		update_item_number (prev, e);
		if (prev->next == self)
			update_item_number (self, e);
	}
	if (next && to) {
		if (next->prev == self)
			update_item_number (self, e);
		update_item_number (next, e);
	}

	return rv;
}

static void
set_head_size (HTMLObject *o)
{
	if (o && HTML_CLUE (o)->head)
		HTML_CLUE (o)->head->change |= HTML_CHANGE_SIZE;
}

static void
set_tail_size (HTMLObject *o)
{
	if (o && HTML_CLUE (o)->tail) {
		HTML_CLUE (o)->tail->change |= HTML_CHANGE_SIZE;
	}
}

static void
set_around_size (HTMLObject *o) {
        if (o) {
                o->change |= HTML_CHANGE_SIZE;
                if (o->next)
                        o->next->change |= HTML_CHANGE_SIZE;
                if (o->prev)
                        o->prev->change |= HTML_CHANGE_SIZE;
        }
}

static void
split (HTMLObject *self,
       HTMLEngine *e,
       HTMLObject *child,
       gint offset,
       gint level,
       GList **left,
       GList **right)
{
	set_around_size (child);
	html_clue_remove_text_slaves (HTML_CLUE (self));
	(*HTML_OBJECT_CLASS (parent_class)->split) (self, e, child, offset, level, left, right);

	update_item_number (self, e);
}

static gboolean
merge (HTMLObject *self,
       HTMLObject *with,
       HTMLEngine *e,
       GList **left,
       GList **right,
       HTMLCursor *cursor)
{
	HTMLClueFlow *cf1, *cf2;
	HTMLObject *cf2_next_relative;
	gboolean rv;

	cf1 = HTML_CLUEFLOW (self);
	cf2 = HTML_CLUEFLOW (with);

	html_clue_remove_text_slaves (HTML_CLUE (cf1));
	html_clue_remove_text_slaves (HTML_CLUE (cf2));

	cf2_next_relative = get_next_relative_item (with);

	set_tail_size (self);
	set_head_size (with);

	if (html_clueflow_is_empty (cf1)) {
		self->x = with->x;
		self->y = with->y;
		self->width = with->width;
		self->ascent = with->ascent;
		self->descent = with->descent;
		HTML_CLUE  (cf1)->halign = HTML_CLUE (cf2)->halign;
		HTML_CLUE  (cf1)->valign = HTML_CLUE (cf2)->valign;
		html_object_copy_data_from_object (self, with);
		cf1->dir = cf2->dir;
	}

	rv = (* HTML_OBJECT_CLASS (parent_class)->merge) (self, with, e, left, right, cursor);

	if (rv) {
		if (is_item (cf1)) {
			/* cf2 will be removed, update item numbers around
			 * as if it was already removed - it has to have
			 * the same item style as cf1 to not break item lists*/
			g_byte_array_free (cf2->levels, TRUE);
			cf2->levels = html_clueflow_dup_levels (cf1);
			cf2->style = cf1->style;
			cf2->item_type = cf1->item_type;

			update_item_number (self, e);
			cf1->item_number--;
			update_item_number (with, e);
			cf1->item_number++;

			if (cf2_next_relative)
				update_item_number (cf2_next_relative, e);
		}

	}

	return rv;
}

static guint
calc_padding (HTMLPainter *painter)
{
	if (!HTML_IS_PLAIN_PAINTER (painter)) {
		return 2 * html_painter_get_space_width (painter, GTK_HTML_FONT_STYLE_SIZE_3, NULL);
	}
	return 0;
}

static gboolean
is_cite (HTMLClueFlow *flow,
         gint level)
{
	if (flow->levels->data[level] == HTML_LIST_TYPE_BLOCKQUOTE_CITE)
		return TRUE;

	return FALSE;
}

static gboolean
is_header (HTMLClueFlow *flow)
{
	switch (flow->style) {
	case HTML_CLUEFLOW_STYLE_H1:
	case HTML_CLUEFLOW_STYLE_H2:
	case HTML_CLUEFLOW_STYLE_H3:
	case HTML_CLUEFLOW_STYLE_H4:
	case HTML_CLUEFLOW_STYLE_H5:
	case HTML_CLUEFLOW_STYLE_H6:
		return TRUE;
	default:
		return FALSE;
	}
}

static gboolean
need_blockquote_padding (HTMLClueFlow *flow,
                          HTMLClueFlow *prev)
{
	gint i = get_similar_depth (flow, prev);

	/*
	 * If the levels don't match up the the current flow
	 * level the padding should be handled the other way.
	 */
	if (i < flow->levels->len || flow->levels->len == 0) {
		if (i < prev->levels->len)
			return TRUE;
		else
			return FALSE;
	}

	i = prev->levels->len - i;

	/*
	 * now we check each level greater than the current flow level
	 * and see if it is a blockquote and therefore needs padding
	 */
	while (i > 0) {
		HTMLListType type;

		type = prev->levels->data[prev->levels->len - i];

		if (is_blockquote (type)) {
			return TRUE;
		}
		i--;
	}

	/*
	 * If all the levels were items we don't need padding
	 */
	return FALSE;
}

static guint
get_pre_padding (HTMLClueFlow *flow,
                 guint pad)
{
	HTMLObject *prev_object;

	prev_object = HTML_OBJECT (flow)->prev;
	if (prev_object == NULL)
		return 0;

	if (HTML_OBJECT_TYPE (prev_object) == HTML_TYPE_CLUEFLOW) {
		HTMLClueFlow *prev;

		if (get_post_padding (HTML_CLUEFLOW (prev_object), 1))
			return 0;

		prev = HTML_CLUEFLOW (prev_object);

		if (!is_levels_equal (flow, prev)) {
			if (need_blockquote_padding (flow, prev))
				return pad;
			else
				return 0;
		}

		if (flow->style == HTML_CLUEFLOW_STYLE_PRE
		    && prev->style != HTML_CLUEFLOW_STYLE_PRE
		    && !is_header (prev))
			return pad;

		if (is_header (flow) && !is_header (prev))
			return pad;

		return 0;
	}

	if (!is_header (flow) && flow->levels->len == 0)
		return 0;

	return pad;
}

static guint
get_post_padding (HTMLClueFlow *flow,
                  guint pad)
{
	HTMLObject *next_object;

	next_object = HTML_OBJECT (flow)->next;
	if (next_object == NULL)
		return 0;

	if (HTML_OBJECT_TYPE (next_object) == HTML_TYPE_CLUEFLOW) {
		HTMLClueFlow *next;

		next = HTML_CLUEFLOW (next_object);

		if (!is_levels_equal (next, flow)) {
			if (need_blockquote_padding (flow, next))
				return pad;
			else
				return 0;
		}

		if (flow->style == HTML_CLUEFLOW_STYLE_PRE
		    && next->style != HTML_CLUEFLOW_STYLE_PRE
		    && !is_header (next))
			return pad;

		if (is_header (flow))
			return pad;

		return 0;
	}

	if (!is_header (flow) && flow->levels->len == 0)
		return 0;

	return pad;
}

static void
add_pre_padding (HTMLClueFlow *flow,
                 guint pad)
{
	guint real_pad;

	real_pad = get_pre_padding (flow, pad);

	HTML_OBJECT (flow)->ascent += real_pad;
	HTML_OBJECT (flow)->y += real_pad;
}

static void
add_post_padding (HTMLClueFlow *flow,
                  guint pad)
{
	guint real_pad;

	real_pad = get_post_padding (flow, pad);

	HTML_OBJECT (flow)->ascent += real_pad;
	HTML_OBJECT (flow)->y += real_pad;
}

static guint
get_level_indent (HTMLClueFlow *flow,
                  gint level,
                  HTMLPainter *painter)
{
	HTMLDirection dir = html_object_get_direction (HTML_OBJECT (flow));
	guint indent = 0;
	gint i = 0;

	if (flow->levels->len > 0 || !is_item (flow)) {
		guint cite_width, indent_width;

		cite_width = html_painter_get_block_cite_width (painter, GTK_HTML_FONT_STYLE_SIZE_3, NULL, dir)
			+ html_painter_get_space_width (painter, GTK_HTML_FONT_STYLE_SIZE_3, NULL);
		indent_width = html_painter_get_block_indent_width (painter, GTK_HTML_FONT_STYLE_SIZE_3, NULL);

		while (i <= level) {
			switch (flow->levels->data[i]) {
			case HTML_LIST_TYPE_BLOCKQUOTE_CITE:
				indent += cite_width;
				break;
			case HTML_LIST_TYPE_GLOSSARY_DL:
				indent += 0;
				break;
			default:
				indent += indent_width;
				break;
			}
			i++;
		}
	} else {
		GtkHTMLFontStyle style;
		style = html_clueflow_get_default_font_style (flow);

		indent = 4 * html_painter_get_space_width (painter, style, NULL);
	}

	return indent;
}

static void
set_painter (HTMLObject *o,
             HTMLPainter *painter)
{
	HTML_CLUEFLOW (o)->indent_width = -1;
}

static guint
get_indent (HTMLClueFlow *flow,
            HTMLPainter *painter)
{
	if (flow->indent_width < 0 )
		flow->indent_width = get_level_indent (flow, flow->levels->len -1, painter);

	return flow->indent_width;
}

/* HTMLObject methods.  */

static void
set_max_width (HTMLObject *o,
               HTMLPainter *painter,
               gint max_width)
{
	HTMLObject *obj;
	guint indent;

	o->max_width = max_width;

	indent = get_indent (HTML_CLUEFLOW (o), painter);

	for (obj = HTML_CLUE (o)->head; obj != 0; obj = obj->next) {
		html_object_set_max_width (obj, painter, o->max_width - indent);
	}
}

static gint
calc_min_width (HTMLObject *o,
                HTMLPainter *painter)
{
	HTMLObject *cur;
	gint min_width = 0;
	gint aligned_min_width = 0;
	gint w = 0;
	gboolean add;

	add = HTML_CLUEFLOW (o)->style == HTML_CLUEFLOW_STYLE_PRE && !HTML_IS_PRINTER (painter);

	cur = HTML_CLUE (o)->head;
	while (cur) {
		if (cur->flags & HTML_OBJECT_FLAG_ALIGNED)
			aligned_min_width = MAX (aligned_min_width, html_object_calc_min_width (cur, painter));
		else {
			w += add
				? html_object_calc_preferred_width (cur, painter)
				: html_object_calc_min_width (cur, painter);
			if (!add || !cur->next) {
				if (min_width < w) min_width = w;
				w = 0;
			}
		}
		cur = cur->next;
	}

	return MAX (aligned_min_width, min_width) + get_indent (HTML_CLUEFLOW (o), painter);
}

static gint
pref_left_margin (HTMLPainter *p,
                  HTMLObject *o,
                  gint indent)
{
	gint margin = html_object_get_left_margin (o->parent, p, o->y, TRUE);

	if (html_object_get_direction (o) == HTML_DIRECTION_RTL) {
		if ((HTML_CLUEFLOW (o)->style != HTML_CLUEFLOW_STYLE_PRE || HTML_IS_PRINTER (p)) && HTML_IS_PLAIN_PAINTER (p))
			return MAX (margin, o->width - (gint)(72 * (MAX (html_painter_get_space_width (p, GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_FIXED, NULL),
									html_painter_get_e_width (p, GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_FIXED, NULL)))));
	} else {
		if (indent > margin)
			margin = indent;
	}

	return margin;
}

static gint
pref_right_margin (HTMLPainter *p,
                   HTMLObject *o,
                   gint indent)
{
	gint margin = html_object_get_right_margin (o->parent, p, o->y, TRUE);

	if (html_object_get_direction (o) != HTML_DIRECTION_RTL) {
		if ((HTML_CLUEFLOW (o)->style != HTML_CLUEFLOW_STYLE_PRE || HTML_IS_PRINTER (p)) && HTML_IS_PLAIN_PAINTER (p))
			return MIN (margin, 72 * (MAX (html_painter_get_space_width (p, GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_FIXED, NULL),
						       html_painter_get_e_width (p, GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_FIXED, NULL))));
	} else {
		if (indent > o->width - margin)
			margin = o->width - indent;
	}

	return margin;
}

static void
add_clear_area (GList **changed_objs,
                HTMLObject *o,
                gint x,
                gint w)
{
	HTMLObjectClearRectangle *cr;

	cr = g_new (HTMLObjectClearRectangle, 1);

	cr->object = o;
	cr->x = x;
	cr->y = 0;
	cr->width = w;
	cr->height = o->ascent + o->descent;

	*changed_objs = g_list_prepend (*changed_objs, cr);
	/* NULL means: clear following rectangle */
	*changed_objs = g_list_prepend (*changed_objs, NULL);
}

static void
calc_margins (HTMLObject *o,
              HTMLPainter *painter,
              gint indent,
              gint *lmargin,
              gint *rmargin)
{
	*lmargin = pref_left_margin (painter, o, indent);
	*rmargin = pref_right_margin (painter, o, indent);
}

static inline gint
width_left (HTMLObject *o,
            gint x,
            gint rmargin,
            gboolean printing)
{
	return (!printing && HTML_CLUEFLOW (o)->style == HTML_CLUEFLOW_STYLE_PRE) ? G_MAXINT : rmargin - x;
}

static gint
object_nb_width (HTMLObject *o,
                 HTMLPainter *painter,
                 gboolean lineBegin)
{
	if (HTML_IS_TEXT_SLAVE (o))
		return html_text_slave_get_nb_width (HTML_TEXT_SLAVE (o), painter, lineBegin);

	return html_object_calc_min_width (o, painter);
}

static inline gboolean
is_top_aligned (HTMLVAlignType valign)
{
	return valign == HTML_VALIGN_TOP;
}

static inline void
update_leafs_children_changed_size (HTMLObject *o,
                                    gboolean *leaf_children_changed_size)
{
	if (o && o->change & HTML_CHANGE_SIZE
	    && HTML_OBJECT_TYPE (o) != HTML_TYPE_TEXTSLAVE && !html_object_is_container (o))
		*leaf_children_changed_size = TRUE;
}

static inline void
update_height (HTMLObject *o,
               HTMLVAlignType valign,
               gint *a,
               gint *d,
               gint *height,
               gboolean *top)
{
	switch (valign) {
	case HTML_VALIGN_TOP:
		*top = TRUE;
		*height = MAX (*height, o->ascent + o->descent);
		break;
	case HTML_VALIGN_NONE:
	case HTML_VALIGN_BOTTOM:
		*a = MAX (*a, o->ascent);
		*d = MAX (*d, o->descent);
		*height = MAX (*height, *a + *d);
		break;
	case HTML_VALIGN_MIDDLE: {
		gint h, h2;

		h = o->ascent + o->descent;
		h2 = h / 2;
		*a = MAX (*a, h2);
		*d = MAX (*d, h - h2);
		*height = MAX (*height, *a + *d);
		break;
	}
	}
}

static inline void
update_top_height (HTMLObject *begin,
                   HTMLObject *end,
                   gint *a,
                   gint *d,
                   gint *height)
{
	while (begin && begin != end) {
		if (html_object_get_valign (begin) == HTML_VALIGN_TOP) {
			gint rest = begin->ascent + begin->descent - *a;

			if (rest > *d) {
				*d = rest;
				*height = MAX (*height, *a + *d);
			}
		}
		begin = begin->next;
	}
}

inline HTMLHAlignType
html_clueflow_get_halignment (HTMLClueFlow *flow)
{
	g_return_val_if_fail (flow != NULL, HTML_HALIGN_NONE);

	if (HTML_CLUE (flow)->halign == HTML_HALIGN_NONE) {
		HTMLHAlignType halign;

		if (HTML_OBJECT (flow)->parent && HTML_IS_TABLE_CELL (HTML_OBJECT (flow)->parent))
			halign = HTML_CLUE (HTML_OBJECT (flow)->parent)->halign == HTML_HALIGN_NONE
				? HTML_TABLE_CELL (HTML_OBJECT (flow)->parent)->heading ? HTML_HALIGN_CENTER : HTML_HALIGN_NONE
				: HTML_CLUE (HTML_OBJECT (flow)->parent)->halign;
		else
			halign = HTML_CLUE (HTML_OBJECT (flow)->parent)->halign;

		if (halign == HTML_HALIGN_NONE) {
			switch (html_object_get_direction (HTML_OBJECT (flow))) {
			case HTML_DIRECTION_LTR:
				halign = HTML_HALIGN_LEFT;
				break;
			case HTML_DIRECTION_RTL:
				halign = HTML_HALIGN_RIGHT;
				break;
			default:
				break;
			}
		}

		return halign;

	} else
		return HTML_CLUE (flow)->halign;
}

static inline void
update_line_positions (HTMLObject *clue,
                       HTMLObject *begin,
                       HTMLObject *end,
                       gint left,
                       gint a,
                       gint d,
                       gint height)
{
	gint xinc = 0;

	switch (html_clueflow_get_halignment (HTML_CLUEFLOW (clue))) {
	case HTML_HALIGN_NONE:
	case HTML_HALIGN_LEFT:
		xinc = 0;
		break;
	case HTML_HALIGN_CENTER:
		xinc = left / 2;
		break;
	case HTML_HALIGN_RIGHT:
		xinc = left;
		break;
	}

	while (begin && begin != end) {
		begin->x += xinc;

		switch (html_object_get_valign (begin)) {
		case HTML_VALIGN_NONE:
		case HTML_VALIGN_BOTTOM:
			begin->y = clue->ascent + a;
			break;
		case HTML_VALIGN_MIDDLE:
			begin->y = clue->ascent + (height - begin->ascent - begin->descent) / 2 + begin->ascent;
			break;
		case HTML_VALIGN_TOP:
			begin->y = clue->ascent + begin->ascent;
			break;
		}
		begin = begin->next;
	}
}

static HTMLObject *
layout_line (HTMLObject *o,
             HTMLPainter *painter,
             HTMLObject *begin,
             GList **changed_objs,
             gboolean *leaf_children_changed_size,
             gint *lmargin,
             gint *rmargin,
             gint indent)
{
	HTMLObject *cur;
	gboolean first = TRUE;
	gboolean top_align = FALSE;
	gboolean need_update_height = FALSE;
	gint old_y;
	gint x;
	gint start_lmargin;
	gint a, d, height;
	gint nb_width;

	if (html_object_is_text (begin)) {
		update_leafs_children_changed_size (begin, leaf_children_changed_size);
		/* this ever succeeds and creates slaves */
		html_object_calc_size (begin, painter, changed_objs);
		html_object_fit_line (begin, painter, first, first, FALSE, 0);
		begin = begin->next;
	}
	cur = begin;

	old_y = o->y;
	if (!HTML_IS_TEXT_SLAVE (begin) || HTML_IS_TEXT (begin->prev))
		html_object_calc_size (begin, painter, changed_objs);

	a = d = height = 0;
	update_height (begin, html_object_get_valign (begin), &a, &d, &height, &top_align);

	nb_width = object_nb_width (begin, painter, first);
	if (*rmargin - *lmargin < nb_width)
		html_clue_find_free_area (HTML_CLUE (o->parent), painter, o->y,
					  nb_width, height,
					  indent, &o->y, lmargin, rmargin);

	x = start_lmargin = *lmargin;
	o->ascent += o->y - old_y;

	while (cur && !(cur->flags & HTML_OBJECT_FLAG_ALIGNED)) {
		HTMLFitType fit;
		HTMLVAlignType valign;

		update_leafs_children_changed_size (cur, leaf_children_changed_size);

		cur->x = x;
		if (cur != begin)
			html_object_calc_size (cur, painter, changed_objs);

		valign = html_object_get_valign (cur);
		if ((!is_top_aligned (valign) && (cur->ascent > a || cur->descent > d))
		    || cur->ascent + cur->descent > height) {
			nb_width = object_nb_width (cur, painter, first);
			old_y = o->y;
			html_clue_find_free_area (HTML_CLUE (o->parent), painter, o->y,
						  nb_width, height,
						  indent, &o->y, lmargin, rmargin);

			/* is there enough space for this object? */
			if ((HTML_IS_PRINTER (painter) || HTML_CLUEFLOW (o)->style != HTML_CLUEFLOW_STYLE_PRE) && o->y != old_y && *rmargin - x < nb_width)
				break;
			need_update_height = TRUE;
		}

		cur->y = o->ascent + a;
		fit = html_object_fit_line (cur, painter, first, first, FALSE, width_left (o, x, *rmargin, HTML_IS_PRINTER (painter)));
		first = FALSE;
		if (fit == HTML_FIT_NONE)
			break;

		if (need_update_height)
			update_height (cur, valign, &a, &d, &height, &top_align);
		need_update_height = FALSE;
		x += cur->width;
		cur = cur->next;

		if (fit == HTML_FIT_PARTIAL)
			break;
	}

	if (top_align)
		update_top_height (begin, cur, &a, &d, &height);
	update_line_positions (o, begin, cur, MAX (0, *rmargin - start_lmargin - x), a, d, height);

	o->y += height;
	o->ascent += height;

	calc_margins (o, painter, indent, lmargin, rmargin);

	return cur;
}

static HTMLObject *
layout_aligned (HTMLObject *o,
                HTMLPainter *painter,
                HTMLObject *cur,
                GList **changed_objs,
                gboolean *leaf_children_changed_size,
                gint *lmargin,
                gint *rmargin,
                gint indent,
                gboolean *changed)
{
	if (!html_clue_appended (HTML_CLUE (o->parent), HTML_CLUE (cur))) {
		html_object_calc_size (cur, painter, changed_objs);

		if (HTML_CLUE (cur)->halign == HTML_HALIGN_LEFT)
			html_clue_append_left_aligned (HTML_CLUE (o->parent), painter,
						       HTML_CLUE (cur), lmargin, rmargin, indent);
		else
			html_clue_append_right_aligned (HTML_CLUE (o->parent), painter,
							HTML_CLUE (cur), lmargin, rmargin, indent);
		*changed = TRUE;
	}

	return cur->next;
}

static gboolean
html_clue_flow_layout (HTMLObject *o,
                       HTMLPainter *painter,
                       GList **changed_objs,
                       gboolean *leaf_children_changed_size)
{
	HTMLClueFlow *cf = HTML_CLUEFLOW (o);
	HTMLObject *cur = HTML_CLUE (o)->head;
	gint indent, lmargin, rmargin;
	gboolean changed = FALSE;

	/* prepare margins */
	indent = get_indent (cf, painter);
	calc_margins (o, painter, indent, &lmargin, &rmargin);

	while (cur) {
		if (cur->flags & HTML_OBJECT_FLAG_ALIGNED)
			cur = layout_aligned (o, painter, cur, changed_objs, leaf_children_changed_size,
					      &lmargin, &rmargin, indent, &changed);
		else
			cur = layout_line (o, painter, cur, changed_objs, leaf_children_changed_size,
					   &lmargin, &rmargin, indent);
	}

	return changed;
}

static gboolean
html_clue_flow_real_calc_size (HTMLObject *o,
                               HTMLPainter *painter,
                               GList **changed_objs)
{
	HTMLClueFlow *cf = HTML_CLUEFLOW (o);
	gint oa, od, ow, padding;
	gboolean leaf_children_changed_size = FALSE;
	gboolean changed, changed_size = FALSE;

	/* reset size */
	oa = o->ascent;
	od = o->descent;
	ow = o->width;

	cf->indent_width = -1;

	o->ascent = 0;
	o->descent = 0;
	o->width = MAX (o->max_width, html_object_calc_min_width (o, painter));

	/* calc size */
	padding = calc_padding (painter);
	add_pre_padding (cf, padding);
	changed = html_clue_flow_layout (o, painter, changed_objs, &leaf_children_changed_size);
	add_post_padding (cf, padding);

	/* take care about changes */
	if (o->ascent != oa || o->descent != od || o->width != ow)
		changed = changed_size = TRUE;

	if (changed_size || leaf_children_changed_size)
		if (changed_objs) {
			if (ow > o->max_width && o->width < ow)
				add_clear_area (changed_objs, o, o->width, ow - o->width);
			html_object_add_to_changed (changed_objs, o);
		}

	return changed;
}

static void
set_max_height (HTMLObject *o,
                HTMLPainter *painter,
                gint max_height)
{
}

static HTMLClearType
get_clear (HTMLObject *self)
{
	return HTML_CLUEFLOW (self)->clear;
}

static gint
calc_preferred_width (HTMLObject *o,
                      HTMLPainter *painter)
{
	HTMLObject *obj, *next;
	gint maxw = 0, w = 0;

	next = NULL;

	for (obj = HTML_CLUE (o)->head; obj != 0; obj = obj->next) {
		w += html_object_calc_preferred_width (obj, painter);

		if (!(next = html_object_next_not_slave (obj))) {

			/* remove trailing space width on the end of line which is not on end of paragraph */
			if (next && html_object_is_text (obj))
				w -= html_text_trail_space_width (HTML_TEXT (obj), painter);

			if (w > maxw)
				maxw = w;
			w = 0;
		}
	}

	return maxw + get_indent (HTML_CLUEFLOW (o), painter);
}

static gchar *
get_alpha_value (gint value,
                 gboolean lower)
{
	GString *str;
	gchar *rv;
	gint add = lower ? 'a' : 'A';

	str = g_string_new (". ");

	do {
		g_string_prepend_c (str, ((value - 1) % 26) + add);
		value = (value - 1) / 26;
	} while (value);

	rv = str->str;
	g_string_free (str, FALSE);

	return rv;
}

#define BASES 7

static gchar *
get_roman_value (gint value,
                 gboolean lower)
{
	GString *str;
	const gchar *base = "IVXLCDM";
	gchar *rv;
	gint b, r, add = lower ? 'a' - 'A' : 0;

	if (value > 3999)
		return g_strdup ("?. ");

	str = g_string_new (". ");

	for (b = 0; value > 0 && b < BASES - 1; b += 2, value /= 10) {
		r = value % 10;
		if (r != 0) {
			if (r < 4) {
				for (; r; r--)
					g_string_prepend_c (str, base[b] + add);
			} else if (r == 4) {
				g_string_prepend_c (str, base[b + 1] + add);
				g_string_prepend_c (str, base[b] + add);
			} else if (r == 5) {
				g_string_prepend_c (str, base[b + 1] + add);
			} else if (r < 9) {
				for (; r > 5; r--)
					g_string_prepend_c (str, base[b] + add);
				g_string_prepend_c (str, base[b + 1] + add);
			} else if (r == 9) {
				g_string_prepend_c (str, base[b + 2] + add);
				g_string_prepend_c (str, base[b] + add);
			}
		}
	}

	rv = str->str;
	g_string_free (str, FALSE);

	return rv;
}

static gchar *
get_item_marker_str (HTMLClueFlow *flow,
                     gboolean ascii_only)
{
	HTMLListType type = flow->item_type;

	if (type == HTML_LIST_TYPE_BLOCKQUOTE && flow->levels->len > 0) {
		gint i;

		for (i = flow->levels->len - 1; i >= 0; i--) {
			if (flow->levels->data[i] != HTML_LIST_TYPE_BLOCKQUOTE) {
				type = flow->levels->data[i];
				break;
			}
		}
	}

	switch (type) {
	case HTML_LIST_TYPE_ORDERED_ARABIC:
		return g_strdup_printf ("%d. ", flow->item_number);
	case HTML_LIST_TYPE_ORDERED_LOWER_ALPHA:
	case HTML_LIST_TYPE_ORDERED_UPPER_ALPHA:
		return get_alpha_value (flow->item_number, flow->item_type == HTML_LIST_TYPE_ORDERED_LOWER_ALPHA);
	case HTML_LIST_TYPE_ORDERED_LOWER_ROMAN:
	case HTML_LIST_TYPE_ORDERED_UPPER_ROMAN:
		return get_roman_value (flow->item_number, flow->item_type == HTML_LIST_TYPE_ORDERED_LOWER_ROMAN);
	case HTML_LIST_TYPE_CIRCLE:
		return g_strdup ("\342\227\213 "); /* U+25CB WHITE CIRCLE */
	case HTML_LIST_TYPE_DISC:
		return g_strdup ("\342\227\217 "); /* U+25CF BLACK CIRCLE */
	case HTML_LIST_TYPE_SQUARE:
		return g_strdup ("\342\226\240 "); /* U+25AA BLACK SQUARE */
	case HTML_LIST_TYPE_UNORDERED:
		if (ascii_only)
			return g_strdup ("* ");
		else if (flow->levels->len == 0 || flow->levels->len & 1)
			return g_strdup ("\342\227\217 "); /* U+25CF BLACK CIRCLE */
		else
			return g_strdup ("\342\227\213 "); /* U+25CB WHITE CIRCLE */
	default:
		return NULL;
	}
}

static void
draw_cite_line (HTMLObject *cur,
                HTMLPainter *p,
                const gchar *cite_str,
                gint offset,
                gint x,
                gint y)
{
	gint cy, w, a, d;

	/* FIXME: cache items and glyphs? */
	html_painter_calc_text_size (p, cite_str, strlen (cite_str),
				     &w, &a, &d);

	cy = offset;
	while (cy + a <= cur->ascent) {
		/* FIXME: cache items and glyphs? */
		html_painter_draw_text (p, x, y + cur->y - cy, cite_str, 1);
		cy += a + d;
	}

	cy = - offset + a + d;
	while (cy + d <= cur->descent) {
		/* FIXME: cache items and glyphs? */
		html_painter_draw_text (p, x, y + cur->y + cy, cite_str, 1);
		cy += a + d;
	}
}

static void
draw_quotes (HTMLObject *self,
             HTMLPainter *painter,
             gint x,
             gint y,
             gint width,
             gint height,
             gint tx,
             gint ty)
{
	HTMLClueFlow *flow;
	GdkRectangle paint, area, clip;
	gint i;
	gint indent = 0;
	gint last_indent = 0;
	gint pixel_size = html_painter_get_pixel_size (painter);
	gboolean is_plain = HTML_IS_PLAIN_PAINTER (painter);
	HTMLDirection dir = html_object_get_direction (self);
	HTMLEngine *e;

	if (painter->widget && GTK_IS_HTML (painter->widget))
		e = html_object_engine (self, GTK_HTML (painter->widget)->engine);
	else
		return;

	flow = HTML_CLUEFLOW (self);

	for (i = 0; i < flow->levels->len; i++, last_indent = indent) {
		indent = get_level_indent (flow, i, painter);

		html_painter_set_pen (painter, &html_colorset_get_color_allocated (e->settings->color_set,
										   painter, HTMLLinkColor)->color);
		if (is_cite (flow, i)) {
			if (!is_plain) {
				if (dir == HTML_DIRECTION_RTL)
					area.x = self->x + self->width - indent + 3 * pixel_size;
				else
					area.x = self->x + indent - 5 * pixel_size;
				area.width = 2 * pixel_size;
				area.y = self->y - self->ascent;
				area.height = self->ascent + self->descent;

				clip.x = x;
				clip.width = width;
				clip.y = y;
				clip.height = height;

				if (!gdk_rectangle_intersect (&clip, &area, &paint))
					return;

				html_painter_fill_rect (painter,
							paint.x + tx, paint.y + ty,
							paint.width, paint.height);
			} else {
				HTMLObject *cur = HTML_CLUE (self)->head;
				gint x_pos, baseline = 0;
				const gchar *cite_str = dir == HTML_DIRECTION_RTL ? HTML_BLOCK_CITE_RTL : HTML_BLOCK_CITE_LTR;

				while (cur) {
					if (cur->y != 0) {
						baseline = cur->y;
						break;
					}
					cur = cur->next;
				}

				/* draw "> " quote characters in the plain case */
				html_painter_set_font_style (painter, GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_FIXED);
				html_painter_set_font_face  (painter, NULL);

				if (dir == HTML_DIRECTION_RTL)
					x_pos = self->x + self->width - last_indent;
				else
					x_pos = self->x + last_indent;

				draw_cite_line (self, painter, cite_str, self->ascent - baseline,
						x_pos + tx, ty);
			}
		}
	}
}

static void
draw_item (HTMLObject *self,
           HTMLPainter *painter,
           gint x,
           gint y,
           gint width,
           gint height,
           gint tx,
           gint ty)
{
	HTMLClueFlow *flow;
	HTMLObject *first;
	gchar *marker;
	HTMLEngine *e;

	if (painter->widget && GTK_IS_HTML (painter->widget))
		e = html_object_engine (self, GTK_HTML (painter->widget)->engine);
	else
		return;

	first = HTML_CLUE (self)->head;
	if (html_object_is_text (first) && first->next)
		first = first->next;

	flow = HTML_CLUEFLOW (self);

	if (flow->item_color) {
		html_color_alloc (flow->item_color, painter);
		html_painter_set_pen (painter, &flow->item_color->color);
	} else
		html_painter_set_pen (painter, &html_colorset_get_color_allocated (e->settings->color_set,
										   painter, HTMLTextColor)->color);

	marker = get_item_marker_str (flow, HTML_IS_PLAIN_PAINTER (painter));
	if (marker) {
		gint len, asc, dsc, x_pos, space_width;

		len   = g_utf8_strlen (marker, -1);
		html_painter_set_font_style (painter, html_clueflow_get_default_font_style (flow));
		html_painter_set_font_face  (painter, NULL);
		/* FIXME: cache items and glyphs? */
		html_painter_calc_text_size (painter, marker, len, &width, &asc, &dsc);
		space_width = html_painter_get_space_width (painter, html_clueflow_get_default_font_style (flow), NULL);
		/* FIXME: cache items and glyphs? */
		if (html_object_get_direction (self) == HTML_DIRECTION_RTL)
			x_pos = self->x + first->x + first->width + space_width;
		else
			x_pos = self->x + first->x - width - space_width;
		html_painter_draw_text (painter, x_pos + tx,
					self->y - self->ascent + first->y + ty,
					marker, len);
	}
	g_free (marker);
}

static void
draw (HTMLObject *self,
      HTMLPainter *painter,
      gint x,
      gint y,
      gint width,
      gint height,
      gint tx,
      gint ty)
{
	if (y > self->y + self->descent || y + height < self->y - self->ascent)
		return;

	if (HTML_CLUE (self)->head != NULL && is_item (HTML_CLUEFLOW (self)))
		draw_item (self, painter, x, y, width, height, tx, ty);

	if (HTML_CLUE (self)->head != NULL)
		draw_quotes (self, painter, x, y, width, height, tx, ty);

	(* HTML_OBJECT_CLASS (&html_clue_class)->draw) (self, painter, x, y, width, height, tx, ty);
}

static HTMLObject *
check_point (HTMLObject *self,
             HTMLPainter *painter,
             gint x,
             gint y,
             guint *offset_return,
             gboolean for_cursor)
{
	HTMLObject *obj, *p, *pnext, *eol, *cur;
	HTMLClue *clue;
	gint line_ly = 0;
	gint line_y;

	if (x < self->x || x >= self->x + self->width
	    || y < self->y - self->ascent || y >= self->y + self->descent)
		return NULL;

	clue = HTML_CLUE (self);

	x = x - self->x;
	y = y - self->y + self->ascent;

	/*
	 * shift any selection inside the indent block to the
	 * left edge of the flow.
	 */
	if (for_cursor)
		x = MAX (x, get_indent (HTML_CLUEFLOW (self), painter));

	for (p = clue->head; p;) {

		if (html_object_is_text (p))
			p = p->next;
		if (!p)
			break;

		line_y  = line_ly;
		line_ly = p->y + p->descent;

		for (eol = p; eol && (eol->y - eol->ascent < line_ly || eol->ascent + eol->y == line_y);) {
			line_ly = MAX (line_ly, eol->y + eol->descent);
			do
				eol = eol->next;
			while (eol && html_object_is_text (eol));
		}

		if (y >= line_y && y < line_ly)
			for (cur = p; cur && cur != eol;) {
				obj = html_object_check_point (cur, painter, x, for_cursor
							       ? MIN (MAX (y, cur->y - cur->ascent),
								      cur->y + cur->descent - 1) : y,
							       offset_return, for_cursor);

				if (obj != NULL)
					return obj;
				do
					cur = cur->next;
				while (cur && cur != eol && html_object_is_text (cur));
			}
		p = eol;
	}

	if (!for_cursor)
		return NULL;

	/* before */
	p = clue->head;
	if (p && html_object_is_text (p))
		p = p->next;
	if (p && (x < p->x || y < p->y - p->ascent)) {
		obj = html_object_check_point (p, painter, p->x, p->y - p->ascent, offset_return, for_cursor);
		if (obj != NULL)
			return obj;
	}
	for (p = clue->head; p != NULL; p = pnext) {
		if (html_object_is_text (p))
			p = p->next;
		if (!p)
			break;
		pnext = p->next;
		while (pnext && html_object_is_text (pnext))
			pnext = pnext->next;

		/* new line */
		if (pnext == NULL || (pnext->y - pnext->ascent >= p->y + p->descent
				      && y >= p->y - p->ascent
				      && y <  p->y + p->descent)) {
			obj = html_object_check_point (p, painter, MAX (0, p->x + p->width - 1), p->y + p->descent - 1,
						       offset_return, for_cursor);
			if (obj != NULL)
				return obj;
		}
	}

	/* after */
	p = clue->tail;
	if (p && ((x >= p->x + p->width) || (y >= p->y + p->descent))) {
		obj = html_object_check_point (p, painter, MAX (0, p->x + p->width - 1), p->y + p->descent - 1,
					       offset_return, for_cursor);
		if (obj != NULL)
			return obj;
	}
	return NULL;
}


/* Saving support.  */

static gboolean
write_indent (HTMLEngineSaveState *state,
              gint level)
{
	while (level > 0) {
		if (!html_engine_save_output_string (state, "    "))
			return FALSE;
		level--;
	}

	return TRUE;
}

static gchar *
get_list_start_tag (HTMLClueFlow *self)
{
	switch (self->item_type) {
	case HTML_LIST_TYPE_UNORDERED:
	case HTML_LIST_TYPE_MENU:
	case HTML_LIST_TYPE_DIR:
		return g_strdup ("LI");
	case HTML_LIST_TYPE_ORDERED_ARABIC:
		return g_strdup_printf ("LI TYPE=1 VALUE=%d", HTML_CLUEFLOW (self)->item_number);
	case HTML_LIST_TYPE_ORDERED_UPPER_ROMAN:
		return g_strdup_printf ("LI TYPE=I VALUE=%d", HTML_CLUEFLOW (self)->item_number);
	case HTML_LIST_TYPE_ORDERED_LOWER_ROMAN:
		return g_strdup_printf ("LI TYPE=i VALUE=%d", HTML_CLUEFLOW (self)->item_number);
	case HTML_LIST_TYPE_ORDERED_UPPER_ALPHA:
		return g_strdup_printf ("LI TYPE=A VALUE=%d", HTML_CLUEFLOW (self)->item_number);
	case HTML_LIST_TYPE_ORDERED_LOWER_ALPHA:
		return g_strdup_printf ("LI TYPE=a VALUE=%d", HTML_CLUEFLOW (self)->item_number);
	case HTML_LIST_TYPE_GLOSSARY_DL:
		return g_strdup_printf ("DT");
	case HTML_LIST_TYPE_GLOSSARY_DD:
		return g_strdup_printf ("DD");
	default:
		return NULL;
	}

	return NULL;
}

static const gchar *
get_start_tag (HTMLClueFlow *self)
{
	switch (self->style) {
	case HTML_CLUEFLOW_STYLE_H1:
		return "H1";
	case HTML_CLUEFLOW_STYLE_H2:
		return "H2";
	case HTML_CLUEFLOW_STYLE_H3:
		return "H3";
	case HTML_CLUEFLOW_STYLE_H4:
		return "H4";
	case HTML_CLUEFLOW_STYLE_H5:
		return "H5";
	case HTML_CLUEFLOW_STYLE_H6:
		return "H6";
	case HTML_CLUEFLOW_STYLE_ADDRESS:
		return "ADDRESS";
	case HTML_CLUEFLOW_STYLE_PRE:
		return "PRE";
	case HTML_CLUEFLOW_STYLE_LIST_ITEM:
		g_warning ("This should not be reached");
	case HTML_CLUEFLOW_STYLE_NORMAL:
	default:
		return NULL;
	}
}

static const gchar *
get_start_indent_item (HTMLListType type)
{
	switch (type) {
	case HTML_LIST_TYPE_UNORDERED:
	case HTML_LIST_TYPE_MENU:
	case HTML_LIST_TYPE_DIR:
		return "UL";
	case HTML_LIST_TYPE_ORDERED_LOWER_ALPHA:
		return "OL TYPE=a";
	case HTML_LIST_TYPE_ORDERED_UPPER_ALPHA:
		return "OL TYPE=A";
	case HTML_LIST_TYPE_ORDERED_LOWER_ROMAN:
		return "OL TYPE=i";
	case HTML_LIST_TYPE_ORDERED_UPPER_ROMAN:
	return "OL TYPE=I";
	case HTML_LIST_TYPE_ORDERED_ARABIC:
		return "OL TYPE=1";
	case HTML_LIST_TYPE_GLOSSARY_DD:
	case HTML_LIST_TYPE_GLOSSARY_DL:
		return "DL";
	case HTML_LIST_TYPE_BLOCKQUOTE_CITE:
		return "BLOCKQUOTE TYPE=CITE";
	case HTML_LIST_TYPE_BLOCKQUOTE:
		return "BLOCKQUOTE";
	case HTML_LIST_TYPE_CIRCLE:
		return "OL TYPE=CIRCLE";
	case HTML_LIST_TYPE_DISC:
		return "OL TYPE=DISC";
	case HTML_LIST_TYPE_SQUARE:
		return "OL TYPE=SQUARE";
	}
	return "";
}

static const gchar *
get_end_indent_item (HTMLListType type)
{
	switch (type) {
	case HTML_LIST_TYPE_BLOCKQUOTE:
	case HTML_LIST_TYPE_BLOCKQUOTE_CITE:
		return "BLOCKQUOTE";
	case HTML_LIST_TYPE_GLOSSARY_DD:
	case HTML_LIST_TYPE_GLOSSARY_DL:
		return "DL";
	case HTML_LIST_TYPE_UNORDERED:
	case HTML_LIST_TYPE_MENU:
	case HTML_LIST_TYPE_DIR:
		return "UL";
	default:
		return "OL";
	}
	return "";
}

static gint
get_similar_depth (HTMLClueFlow *self,
                   HTMLClueFlow *neighbor)
{
	gint i;
	gint max_depth;

	if (neighbor == NULL)
		return 0;

	max_depth = MIN (self->levels->len, neighbor->levels->len);

	for (i = 0; i < max_depth; i++) {
		if (self->levels->data[i] != neighbor->levels->data[i])
			break;
	}

	return i;
}

static gboolean
save_indent_string (HTMLClueFlow *self,
                    HTMLEngineSaveState *state,
                    const gchar *format,
                    ...)
{
	va_list args;
	gboolean retval;

	if (self->style != HTML_CLUEFLOW_STYLE_PRE)
		if (!write_indent (state, self->levels->len))
			return FALSE;

	va_start (args, format);
	retval = html_engine_save_output_stringv (state, format, args);
	va_end (args);

	return retval;
}

static const gchar *
get_p_str (HTMLClueFlow *self,
           HTMLEngineSaveState *state)
{
	const gchar *p_str = NULL;

	if (self->dir != html_object_get_direction (state->engine->clue)) {
		switch (self->dir) {
		case HTML_DIRECTION_RTL:
			p_str = "<P DIR=RTL>\n";
			break;
		case HTML_DIRECTION_LTR:
			if (html_object_get_direction (state->engine->clue) != HTML_DIRECTION_DERIVED)
				p_str = "<P DIR=LTR>\n";
			break;
		default:
			;
		}
	}

	return p_str;
}

static gboolean
write_flow_tag (HTMLClueFlow *self,
                HTMLEngineSaveState *state)
{
	HTMLClueFlow *next = NULL;
	HTMLClueFlow *prev = NULL;
	HTMLHAlignType halign;
	const gchar *br_str = "<BR>\n";
	gboolean has_div_tag = FALSE;

	if (HTML_IS_CLUEFLOW (HTML_OBJECT (self)->next))
		next = HTML_CLUEFLOW (HTML_OBJECT (self)->next);

	if (HTML_IS_CLUEFLOW (HTML_OBJECT (self)->prev))
		prev = HTML_CLUEFLOW (HTML_OBJECT (self)->prev);

	if (next && next->dir != html_object_get_direction (state->engine->clue)) {
		switch (next->dir) {
		case HTML_DIRECTION_RTL:
			br_str = "<BR DIR=RTL>\n";
			break;
		case HTML_DIRECTION_LTR:
			if (html_object_get_direction (state->engine->clue) != HTML_DIRECTION_DERIVED)
				br_str = "<BR DIR=LTR>\n";
			break;
		default:
			;
		}
	}

	if (!prev) {
		const gchar *p_str = get_p_str (self, state);

		if (p_str) {
			if (!html_engine_save_output_string (state, "%s", p_str))
				return FALSE;
		}
	}

	if (is_item (self)) {
		gchar *li = get_list_start_tag (self);

		if (li && !save_indent_string (self, state, "<%s>", li)) {
			g_free (li);
			return FALSE;
		}
	} else if (is_levels_equal (self, prev) && prev->style == self->style) {
		if (!save_indent_string (self, state, ""))
			return FALSE;
	} else {
		const gchar *start = get_start_tag (self);

		if (start) {
			if (!save_indent_string (self, state, "<%s>\n", start))
				return FALSE;
		} else {
			if (!save_indent_string (self, state, ""))
				return FALSE;
		}
	}

	halign = HTML_CLUE (self)->halign;
	/* Alignment tag.  */
	has_div_tag = halign != HTML_HALIGN_NONE && halign != HTML_HALIGN_LEFT;
	if (has_div_tag) {
		if (!html_engine_save_output_string
		    (state, "<DIV ALIGN=%s>",
		     html_engine_save_get_paragraph_align (html_alignment_to_paragraph (halign))))
			return FALSE;
	}

	if (!html_object_save_data (HTML_OBJECT (self), state))
		return FALSE;

	/* Paragraph's content.  */
	if (!HTML_OBJECT_CLASS (&html_clue_class)->save (HTML_OBJECT (self), state))
		return FALSE;

	/* Close alignment tag.  */
	if (has_div_tag) {
		if (!html_engine_save_output_string (state, "</DIV>"))
			return FALSE;
	}

	if (is_item (self)) {
		if (!has_div_tag && next && is_levels_equal (self, next) && !is_item (next) && !html_clueflow_contains_table (self)) {
			if (!html_engine_save_output_string (state, "%s", br_str))
				return FALSE;
		} else if (!html_engine_save_output_string (state, "\n"))
			return FALSE;
	} else if (is_levels_equal (self, next) && self->style == next->style) {
		if (!has_div_tag && self->style != HTML_CLUEFLOW_STYLE_PRE && !html_clueflow_contains_table (self)) {
			if (!html_engine_save_output_string (state, "%s", br_str))
				return FALSE;
		} else {
			if (!html_engine_save_output_string (state, "\n"))
				return FALSE;
		}
	} else {
		const gchar *end = get_start_tag (self);

		if (self->style != HTML_CLUEFLOW_STYLE_PRE) {
			if (!has_div_tag && ((!html_clueflow_contains_table (self) && !end && next && self->style == next->style) || html_clueflow_is_empty (self))) {
				if (!html_engine_save_output_string (state, "%s", br_str))
					return FALSE;
			} else {
				if (!html_engine_save_output_string (state, "\n"))
					return FALSE;
			}
		} else {
			if (!html_engine_save_output_string (state, "\n"))
				return FALSE;
		}

		if (end) {
			if (!html_engine_save_output_string (state, "</%s>\n", end))
				return FALSE;
		}
	}

	if (!next) {
		if (HTML_OBJECT (self)->parent && html_object_is_clue (HTML_OBJECT (self)->parent)) {
			HTMLObject *head = HTML_CLUE (HTML_OBJECT (self)->parent)->head;

			if (head && HTML_IS_CLUEFLOW (head)) {
				const gchar *head_p_str = get_p_str (HTML_CLUEFLOW (head), state);

				if (head_p_str) {
					if (!html_engine_save_output_string (state, "</P>\n"))
						return FALSE;
				}
			}
		}
	}

	return TRUE;
}

static gboolean
save (HTMLObject *s,
      HTMLEngineSaveState *state)
{
	HTMLClueFlow *self = HTML_CLUEFLOW (s);
	HTMLClueFlow *next = NULL;
	HTMLClueFlow *prev = NULL;
	gint d;
	gint i;

	if (HTML_IS_CLUEFLOW (HTML_OBJECT (self)->next))
		next = HTML_CLUEFLOW (HTML_OBJECT (self)->next);

	if (HTML_IS_CLUEFLOW (HTML_OBJECT (self)->prev))
		prev = HTML_CLUEFLOW (HTML_OBJECT (self)->prev);

	i = get_similar_depth (self, prev);
	while (i < self->levels->len) {
		const gchar *stag = get_start_indent_item (self->levels->data[i]);

		if (!write_indent (state, i)
		    || !html_engine_save_output_string (state, "<%s>\n", stag))
			return FALSE;

		i++;
	}

	if (!write_flow_tag (self, state))
	    return FALSE;

	i = self->levels->len - 1;
	d = get_similar_depth (self, next);
	while (i >= d) {
		const gchar *stag = get_end_indent_item (self->levels->data[i]);

		if (!write_indent (state, i)
		    || !html_engine_save_output_string (state, "</%s>\n", stag))
			return FALSE;

		i--;
	}

	return TRUE;
}

static void
write_item_marker (GString *pad_string,
                   HTMLClueFlow *flow)
{
	gchar *marker;

	marker = get_item_marker_str (flow, TRUE);

	if (marker) {
		gint marker_len = strlen (marker);
		gint len = pad_string->len - 1;
		gchar *str = pad_string->str;

		while (len > 0) {
			if ((str[len - 1] != ' ') || (pad_string->len - len >= marker_len))
				break;
			else
				len--;
		}

		if (len > 0)
			g_string_truncate (pad_string, len);

		g_string_append (pad_string, marker);
		g_free (marker);
	}
}

static gint
plain_padding (HTMLClueFlow *flow,
               GString *out,
               gboolean firstline)
{
	GString *pad_string = NULL;
	gint pad_len = 0;
	gint i;

	pad_string = g_string_new ("");

#define APPEND_PLAIN(w) \
	pad_len += strlen (w); \
	if (out) g_string_append (pad_string, w);

	if (flow->levels->len) {
		for (i = 0; i < flow->levels->len; i++) {
			switch (flow->levels->data[i]) {
			case HTML_LIST_TYPE_BLOCKQUOTE_CITE:
				APPEND_PLAIN (html_object_get_direction (HTML_OBJECT (flow)) == HTML_DIRECTION_RTL ? (" " HTML_BLOCK_CITE_RTL) : (HTML_BLOCK_CITE_LTR " "));
				break;
			case HTML_LIST_TYPE_GLOSSARY_DL:
				break;
			default:
				APPEND_PLAIN (HTML_BLOCK_INDENT);
				break;
			}
		}
	} else if (is_item (flow)) {
		/* item without a list block give it a little pading */
		APPEND_PLAIN ("    ");
	}

	if (is_item (flow) && firstline) {
		write_item_marker (pad_string, flow);
	}

	if (out)
		g_string_append (out, pad_string->str);

	g_string_free (pad_string, TRUE);
	return pad_len;
}

static void
append_selection_string (HTMLObject *self,
                         GString *buffer)
{
	(*HTML_OBJECT_CLASS (parent_class)->append_selection_string) (self, buffer);

	if (self->selected) {
		g_string_append_c (buffer, '\n');
		plain_padding (HTML_CLUEFLOW (self), buffer, TRUE);
	}
}

/*
 * Calculate given UTF-8 string's "cell width", determined by
 * g_unichar_iswide() on each character.  (So it doesn't work on
 * zero-width or combined characters.)
 */
static gint
utf8_width (const gchar *str,
            gint len)
{
	gunichar c;
	gint width = 0;

	while (len--) {
		c = g_utf8_get_char (str);
		width += g_unichar_iswide (c) ? 2 : 1;
		str = g_utf8_next_char (str);
	}
	return width;
}

/*
 * Returns the length of string starting on the given string which is
 * not exceeding the given width.
 */
static gint
utf8_length_in_width (const gchar *str,
                      gint len,
                      gint width)
{
	gunichar c;
	gint l = 0;

	while (len--) {
		c = g_utf8_get_char (str);
		width -= g_unichar_iswide (c) ? 2 : 1;
		if (width < 0)
			break;
		str = g_utf8_next_char (str);
		l++;
	}

	return l;
}

static gboolean
save_plain (HTMLObject *self,
            HTMLEngineSaveState *state,
            gint requested_width)
{
	HTMLClueFlow *flow;
	HTMLEngineSaveState *buffer_state;
	HTMLDirection dir = html_object_get_direction (self);
	GString *out = g_string_new ("");
	gint pad;
	gint align_pad;
	gboolean firstline = TRUE;
	gint max_width;

	flow = HTML_CLUEFLOW (self);

	pad = plain_padding (flow, NULL, FALSE);
	buffer_state = html_engine_save_buffer_new (state->engine,
						    state->inline_frames);
	max_width = MAX (requested_width - pad, 0);
	/* buffer the paragraph's content into the save buffer */
	if (HTML_OBJECT_CLASS (&html_clue_class)->save_plain (self,
							      buffer_state,
							      max_width)) {
		guchar *s;
		gint offset;

		if (get_pre_padding (flow, calc_padding (state->engine->painter)) > 0) {
			plain_padding (flow, out, FALSE);
			g_string_append (out, "\n");
		}

		s = html_engine_save_buffer_peek_text (buffer_state);

		if (*s == 0) {
			plain_padding (flow, out, TRUE);
			g_string_append (out, "\n");
		} else {
			PangoAttrList *attrs = pango_attr_list_new ();
			gint bytes = html_engine_save_buffer_peek_text_bytes (buffer_state), slen = g_utf8_strlen ((gchar *) s, -1), i, clen, n_items;
			GList *items_list, *cur;
			PangoContext *pc = state->engine->painter->pango_context;
			PangoLogAttr *lattrs;
			PangoItem **items;
			gint len, width, skip;

			items_list = pango_itemize (pc, (gchar *) s, 0, bytes, attrs, NULL);
			lattrs = g_new (PangoLogAttr, slen + 1);
			n_items = g_list_length (items_list);
			items = g_new (PangoItem *, n_items);
			for (i = 0, cur = items_list; i < n_items; i++, cur = cur->next)
				items[i] = (PangoItem *) cur->data;

			offset = 0;
			for (i = 0; i < n_items; i++) {
				PangoItem tmp_item;
				gint start_offset;

				start_offset = offset;
				offset += items[i]->num_chars;
				tmp_item = *items[i];
				while (i < n_items - 1) {
					if (tmp_item.analysis.lang_engine == items[i + 1]->analysis.lang_engine) {
						tmp_item.length += items[i + 1]->length;
						tmp_item.num_chars += items[i + 1]->num_chars;
						offset += items[i + 1]->num_chars;
						i++;
					} else
						break;
				}

				pango_break ((gchar *) s + tmp_item.offset, tmp_item.length, &tmp_item.analysis, lattrs + start_offset, tmp_item.num_chars + 1);
			}

			html_text_remove_unwanted_line_breaks ((gchar *) s, slen, lattrs);

			g_list_free (items_list);
			for (i = 0; i < n_items; i++)
				pango_item_free (items[i]);
			g_free (items);
			pango_attr_list_unref (attrs);

			clen = 0;
			while (*s) {
				len = strcspn ((gchar *) s, "\n");
				len = g_utf8_strlen ((gchar *) s, len);
				width = utf8_width ((gchar *) s, len);
				skip = 0;

				if ((flow->style != HTML_CLUEFLOW_STYLE_PRE)
				    && !HTML_IS_TABLE (HTML_CLUE (flow)->head)) {
					if (width > max_width) {
						gboolean look_backward = TRUE;
						gint wmax;
						gint wi, wl;

						wmax = clen + utf8_length_in_width ((gchar *) s, len, max_width);
						wl = wmax;

						if (lattrs[wl].is_white) {

							while (lattrs[wl].is_white && wl < slen)
								wl++;

							if (wl < slen && html_text_is_line_break (lattrs[wl]))
								look_backward = FALSE;
							else
								wl = wmax;
						}

						if (look_backward) {
							while (wl > 0) {
								if (html_text_is_line_break (lattrs[wl]))
									break;
								wl--;
							}
						}

						if (wl > clen && wl < slen && html_text_is_line_break (lattrs[wl])) {
							wi = MIN (wl, wmax);
							while (wi > clen && lattrs[wi - 1].is_white)
								wi--;
							len = wi - clen;
							width = utf8_width ((gchar *) s, len);
							skip = wl - wi;
						}
					}
				}

				/* FIXME plain padding doesn't work properly with tables aligment
				 * at the moment.
				 */
				plain_padding (flow, out, firstline);

				switch (html_clueflow_get_halignment (flow)) {
				case HTML_HALIGN_RIGHT:
					if (dir != HTML_DIRECTION_RTL)
						align_pad = max_width - width;
					else
						align_pad = 0;
					break;
				case HTML_HALIGN_CENTER:
					align_pad = (max_width - width) / 2;
					break;
				default:
					if (dir != HTML_DIRECTION_RTL)
						align_pad = 0;
					else
						align_pad = max_width - width;
					break;
				}

				while (align_pad > 0) {
					g_string_append_c (out, ' ');
					align_pad--;
				}

				bytes = ((guchar *) g_utf8_offset_to_pointer ((gchar *) s, len)) - s;
				html_engine_save_string_append_nonbsp (out, s, bytes);
				s += bytes;
				s = (guchar *) g_utf8_offset_to_pointer ((gchar *) s, skip);
				clen += len + skip;

				if (*s == '\n') {
					s++;
					clen++;
				}

				g_string_append_c (out, '\n');
				firstline = FALSE;
			}
			g_free (lattrs);
		}

		if (get_post_padding (flow, calc_padding (state->engine->painter)) > 0) {
			plain_padding (flow, out, FALSE);
			g_string_append (out, "\n");
		}
	}
	html_engine_save_buffer_free (buffer_state, TRUE);

	if (!html_engine_save_output_string (state, "%s", out->str)) {
		g_string_free (out, TRUE);
		return FALSE;
	}

	g_string_free (out, TRUE);
	return TRUE;
}


static GtkHTMLFontStyle
get_default_font_style (const HTMLClueFlow *self)
{
	GtkHTMLFontStyle style = 0;

	if (HTML_OBJECT (self)->parent && HTML_IS_TABLE_CELL (HTML_OBJECT (self)->parent)
	    && HTML_TABLE_CELL (HTML_OBJECT (self)->parent)->heading)
		style = GTK_HTML_FONT_STYLE_BOLD;

	switch (self->style) {
	case HTML_CLUEFLOW_STYLE_NORMAL:
	case HTML_CLUEFLOW_STYLE_LIST_ITEM:
		return style | GTK_HTML_FONT_STYLE_SIZE_3;
	case HTML_CLUEFLOW_STYLE_ADDRESS:
		return style | GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_ITALIC;
	case HTML_CLUEFLOW_STYLE_PRE:
		return style | GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_FIXED;
	case HTML_CLUEFLOW_STYLE_H1:
		return style | GTK_HTML_FONT_STYLE_SIZE_6 | GTK_HTML_FONT_STYLE_BOLD;
	case HTML_CLUEFLOW_STYLE_H2:
		return style | GTK_HTML_FONT_STYLE_SIZE_5 | GTK_HTML_FONT_STYLE_BOLD;
	case HTML_CLUEFLOW_STYLE_H3:
		return style | GTK_HTML_FONT_STYLE_SIZE_4 | GTK_HTML_FONT_STYLE_BOLD;
	case HTML_CLUEFLOW_STYLE_H4:
		return style | GTK_HTML_FONT_STYLE_SIZE_3 | GTK_HTML_FONT_STYLE_BOLD;
	case HTML_CLUEFLOW_STYLE_H5:
		return style | GTK_HTML_FONT_STYLE_SIZE_2 | GTK_HTML_FONT_STYLE_BOLD;
	case HTML_CLUEFLOW_STYLE_H6:
		return style | GTK_HTML_FONT_STYLE_SIZE_1 | GTK_HTML_FONT_STYLE_BOLD;
	default:
		g_warning ("Unexpected HTMLClueFlow style %d", self->style);
		return style | GTK_HTML_FONT_STYLE_DEFAULT;
	}
}

static void
search_set_info (HTMLObject *cur,
                 HTMLSearch *info,
                 guchar *text,
                 guint index,
                 guint bytes)
{
	guint text_bytes = 0;
	guint cur_bytes;

	info->found_bytes = bytes;

	if (info->found) {
		g_list_free (info->found);
		info->found = NULL;
	}

	while (cur) {
		if (html_object_is_text (cur)) {
			cur_bytes = HTML_TEXT (cur)->text_bytes;
			if (text_bytes + cur_bytes > index) {
				if (!info->found) {
					info->start_pos = g_utf8_pointer_to_offset ((gchar *) text + text_bytes,
										    (gchar *) text + index);
				}
				info->found = g_list_append (info->found, cur);
			}
			text_bytes += cur_bytes;
			if (text_bytes >= index + info->found_bytes) {
				info->stop_pos = info->start_pos + g_utf8_pointer_to_offset ((gchar *) text + index,
											     (gchar *) text + index + info->found_bytes);
				info->last     = HTML_OBJECT (cur);
				return;
			}
		} else if (HTML_OBJECT_TYPE (cur) != HTML_TYPE_TEXTSLAVE) {
			break;
		}
		cur = cur->next;
	}

	g_assert_not_reached ();
}

/* search text objects ([TextMaster, LinkTextMaster], TextSlave*) */
static gboolean
search_text (HTMLObject **beg,
             HTMLSearch *info)
{
	HTMLObject *cur = *beg;
	HTMLObject *end = cur;
	HTMLObject *head;
	guchar *par, *pp;
	guint text_bytes;
	guint eq_bytes;
	gint index;
	gboolean retval = FALSE;

	/* printf ("search flow look for \"text\" %s\n", info->text); */

	/* first get flow text_bytes */
	text_bytes = 0;
	while (cur) {
		if (html_object_is_text (cur)) {
			text_bytes += HTML_TEXT (cur)->text_bytes;
			end = cur;
		} else if (HTML_OBJECT_TYPE (cur) != HTML_TYPE_TEXTSLAVE) {
			break;
		}
		cur = (info->forward) ? cur->next : cur->prev;
	}

	if (text_bytes > 0) {
		par = (guchar *) g_new (gchar, text_bytes + 1);
		par[text_bytes] = 0;

		pp = (info->forward) ? par : par + text_bytes;

		/* now fill par with text */
		head = (info->forward) ? *beg : end;
		cur = *beg;
		while (cur) {
			if (html_object_is_text (cur)) {
				if (!info->forward) {
					pp -= HTML_TEXT (cur)->text_bytes;
				}
				strncpy ((gchar *) pp, HTML_TEXT (cur)->text, HTML_TEXT (cur)->text_bytes);
				if (info->forward) {
					pp += HTML_TEXT (cur)->text_bytes;
				}
			} else if (HTML_OBJECT_TYPE (cur) != HTML_TYPE_TEXTSLAVE) {
				break;
			}
			cur = (info->forward) ? cur->next : cur->prev;
		}

		/* set eq_bytes and pos counters */
		eq_bytes = 0;
		if (info->found) {
			if (info->start_pos > 0)
				index = ((guchar *) g_utf8_offset_to_pointer ((gchar *) par, info->start_pos + ((info->forward) ? 0 : -1))) - par;
			else
				index = info->forward ? ((guchar *) g_utf8_offset_to_pointer ((gchar *) par, info->start_pos) - par) : -1;
		} else {
			index = (info->forward) ? 0 : text_bytes;
		}

		/* make shorter text instead */
		if (!info->forward && index + info->text_bytes < text_bytes) {
			guchar * tmp = (guchar *)(par + index + info->text_bytes);
			*tmp = '\0';
		}

		if ((info->forward && index < text_bytes)
		    || (!info->forward && index >= 0)) {
			if (info->reb) {
				/* regex search */
				gint rv;
#ifndef HAVE_GNU_REGEX
				regmatch_t match;
				/* guchar *p=par+pos; */

				/* FIXME UTF8
				 * replace &nbsp;'s with spaces
				while (*p) {
					if (*p == ENTITY_NBSP) {
						*p = ' ';
					}
					p += (info->forward) ? 1 : -1;
					} */

				while ((info->forward && index < text_bytes)
				       || (!info->forward && index >= 0)) {
					rv = regexec (info->reb,
						      (gchar *) par + index,
						      1, &match, 0);
					if (rv == 0) {
						search_set_info (head, info, par,
								 index + match.rm_so, match.rm_eo - match.rm_so);
						retval = TRUE;
						break;
					}
					index += (info->forward)
						? (((guchar *) g_utf8_next_char ((gchar *) par + index)) - par - index)
						: (((guchar *) g_utf8_prev_char ((gchar *) par + index)) - par - index);
				}
#else
				rv = re_search (info->reb, par, text_bytes, index,
						(info->forward) ? text_bytes - index : -index, NULL);
				if (rv >= 0) {
					guint found_index = rv;
					rv = re_match (info->reb, par, text_bytes, found_index, NULL);
					if (rv < 0) {
						g_warning ("re_match (...) error");
					}
					search_set_info (head, info, par, found_index, rv);
					retval = TRUE;
				} else {
					if (rv < -1) {
						g_warning ("re_search (...) error");
					}
				}
#endif
			} else {
				/* substring search - simple one - could be improved
				 * go thru par and look for info->text */
				while ((info->forward && par[index])
				       || (!info->forward && index >= 0)) {
					gunichar unicode_info, unicode_par;

					unicode_info = g_utf8_get_char (info->text + eq_bytes);
					unicode_par = g_utf8_get_char ((gchar *) par + index);
					if (!info->case_sensitive) {
					     unicode_info = g_unichar_toupper (unicode_info);
					     unicode_par  = g_unichar_toupper (unicode_par);
					}

					if (unicode_info == unicode_par) {
						eq_bytes += (guchar *) g_utf8_next_char (par + index) - par - index;

						if (eq_bytes == info->text_bytes) {
							/* The above par + index is always at the beginning of the last character matched */
							index = (guchar *) g_utf8_next_char ((gchar *) par + index) - par - eq_bytes;
							search_set_info (head, info, par, index, info->text_bytes);
							retval = TRUE;
							break;
						}
					} else {
						index -= eq_bytes;
						eq_bytes = 0;
					}
					index += (info->forward || unicode_info == unicode_par)
						? (((guchar *) g_utf8_next_char (par + index)) - par - index)
						: (index
							? (((guchar *) g_utf8_prev_char ((gchar *) par + index)) - par - index)
							: -1);
				}
			}
		}
		g_free (par);
	}

	*beg = cur;

	return retval;
}

static gboolean
search (HTMLObject *obj,
        HTMLSearch *info)
{
	HTMLClue *clue = HTML_CLUE (obj);
	HTMLObject *cur;
	gboolean next = FALSE;

	/* does last search end here? */
	if (info->found) {
		cur  = HTML_OBJECT (info->found->data);
		next = TRUE;
	} else {
		/* search_next? */
		if (html_search_child_on_stack (info, obj)) {
			cur  = html_search_pop (info);
			cur  = (info->forward) ? cur->next : cur->prev;
			next = TRUE;
		} else {
			/* normal search */
			cur  = (info->forward) ? clue->head : clue->tail;
		}
	}
	while (cur) {
		gboolean found = FALSE;
		gboolean is_text;

		is_text = html_object_is_text (cur);

		if (is_text) {
			if (search_text (&cur, info))
				return TRUE;
		}

		if (info->found) {
			g_list_free (info->found);
			info->found = NULL;
			info->start_pos = 0;
			found = TRUE;
		}

		if (!is_text) {
			if (!found || (info->start_pos < 0 && info->forward) || (info->start_pos >= 0 && !info->forward)) {
				html_search_push (info, cur);
				if (html_object_search (cur, info))
					return TRUE;
				html_search_pop (info);
			}
			cur = (info->forward) ? cur->next : cur->prev;
		}
	}

	if (next) {
		return html_search_next_parent (info);
	}

	return FALSE;
}

static gboolean
search_next (HTMLObject *obj,
             HTMLSearch *info)
{
	return FALSE;
}

static gboolean
relayout (HTMLObject *self,
          HTMLEngine *engine,
          HTMLObject *child)
{
	gint mw;

	mw = html_object_calc_min_width (self, engine->painter);
	if (mw <= self->max_width)
		return (*HTML_OBJECT_CLASS (parent_class)->relayout) (self, engine, child);
	html_engine_calc_size (engine, FALSE);
	html_engine_draw (engine, engine->x_offset, engine->y_offset, engine->width, engine->height);

	return TRUE;
}


void
html_clueflow_type_init (void)
{
	html_clueflow_class_init (&html_clueflow_class, HTML_TYPE_CLUEFLOW, sizeof (HTMLClueFlow));
}

static HTMLDirection
html_clueflow_real_get_direction (HTMLObject *o)
{
	HTMLDirection dir = HTML_CLUEFLOW (o)->dir;

	if (dir == HTML_DIRECTION_DERIVED && o->parent) {
		dir = html_object_get_direction (o->parent);
	}

	if (dir == HTML_DIRECTION_DERIVED) {
		HTMLObject *child;
		for (child = HTML_CLUE (o)->head; child; child = child->next) {
			if (HTML_IS_TEXT (child)) {
				/*if (child == HTML_CLUE (o)->head && html_object_get_length (child) == 0 && o->prev)
					return html_object_get_direction (o->prev);*/

				dir = html_text_direction_pango_to_html (html_text_get_pango_direction (HTML_TEXT (child)));

				break;
			}
		}
	}

	return dir;
}

void
html_clueflow_class_init (HTMLClueFlowClass *klass,
                          HTMLType type,
                          guint size)
{
	HTMLClueClass *clue_class;
	HTMLObjectClass *object_class;

	clue_class = HTML_CLUE_CLASS (klass);
	object_class = HTML_OBJECT_CLASS (klass);

	html_clue_class_init (clue_class, type, size);

	object_class->destroy = destroy;
	object_class->copy = copy;
	object_class->op_cut = op_cut;
	object_class->op_copy = op_copy;
	object_class->split = split;
	object_class->merge = merge;
	object_class->calc_size = html_clue_flow_real_calc_size;
	object_class->set_max_width = set_max_width;
	object_class->set_max_height = set_max_height;
	object_class->calc_min_width = calc_min_width;
	object_class->calc_preferred_width = calc_preferred_width;
	object_class->draw = draw;
	object_class->save = save;
	object_class->save_plain = save_plain;
	object_class->check_point = check_point;
	object_class->append_selection_string = append_selection_string;
	object_class->search = search;
	object_class->search_next = search_next;
	object_class->relayout = relayout;
	object_class->get_recursive_length = get_recursive_length;
	object_class->get_clear = get_clear;
	object_class->set_painter = set_painter;
	object_class->get_direction = html_clueflow_real_get_direction;

	klass->get_default_font_style = get_default_font_style;

	parent_class = &html_clue_class;
}

void
html_clueflow_init (HTMLClueFlow *clueflow,
                    HTMLClueFlowClass *klass,
                    HTMLClueFlowStyle style,
                    GByteArray *levels,
                    HTMLListType item_type,
                    gint item_number,
                    HTMLClearType clear)
{
	HTMLObject *object;
	HTMLClue *clue;

	object = HTML_OBJECT (clueflow);
	clue = HTML_CLUE (clueflow);

	html_clue_init (clue, HTML_CLUE_CLASS (klass));

	object->flags &= ~HTML_OBJECT_FLAG_FIXEDWIDTH;

	clue->valign = HTML_VALIGN_BOTTOM;
	clue->halign = HTML_HALIGN_NONE;
	clueflow->dir = HTML_DIRECTION_DERIVED;

	clueflow->style = style;
	clueflow->levels = levels;
	clueflow->indent_width = -1;

	clueflow->item_type   = item_type;
	clueflow->item_number = item_number;
	clueflow->item_color = NULL;

	clueflow->clear = clear;
}

HTMLObject *
html_clueflow_new (HTMLClueFlowStyle style,
                   GByteArray *levels,
                   HTMLListType item_type,
                   gint item_number,
                   HTMLClearType clear)
{
	HTMLClueFlow *clueflow;

	clueflow = g_new (HTMLClueFlow, 1);
	html_clueflow_init (clueflow, &html_clueflow_class, style, levels, item_type, item_number, clear);

	return HTML_OBJECT (clueflow);
}

HTMLObject *
html_clueflow_new_from_flow (HTMLClueFlow *flow)
{
	HTMLObject *o;

	o = html_clueflow_new (flow->style, html_clueflow_dup_levels (flow),
			       flow->item_type, flow->item_number, flow->clear);
	html_object_copy_data_from_object (o, HTML_OBJECT (flow));

	return o;
}


/* Virtual methods.  */

GtkHTMLFontStyle
html_clueflow_get_default_font_style (const HTMLClueFlow *self)
{
	g_return_val_if_fail (self != NULL, GTK_HTML_FONT_STYLE_DEFAULT);

	return (* HCF_CLASS (self)->get_default_font_style) (self);
}


/* Clue splitting (for editing).  */

/**
 * html_clue_split:
 * @clue:
 * @child:
 *
 * Remove @child and its successors from @clue, and create a new clue
 * containing them.  The new clue has the same properties as the original clue.
 *
 * Return value: A pointer to the new clue.
 **/
HTMLClueFlow *
html_clueflow_split (HTMLClueFlow *clue,
                     HTMLObject *child)
{
	HTMLClueFlow *new;
	HTMLObject *prev;

	g_return_val_if_fail (clue != NULL, NULL);
	g_return_val_if_fail (child != NULL, NULL);

	/* Create the new clue.  */

	new = HTML_CLUEFLOW (html_clueflow_new_from_flow (clue));

	/* Remove the children from the original clue.  */

	prev = child->prev;
	if (prev != NULL) {
		prev->next = NULL;
		HTML_CLUE (clue)->tail = prev;
	} else {
		HTML_CLUE (clue)->head = NULL;
		HTML_CLUE (clue)->tail = NULL;
	}

	child->prev = NULL;
	html_object_change_set (HTML_OBJECT (clue), HTML_CHANGE_ALL_CALC);

	/* Put the children into the new clue.  */

	html_clue_append (HTML_CLUE (new), child);

	/* Return the new clue.  */

	return new;
}


static void
relayout_and_draw (HTMLObject *object,
                   HTMLEngine *engine)
{
	if (engine == NULL)
		return;

	html_object_relayout (object, engine, NULL);
	html_engine_queue_draw (engine, object);
}

/* This performs a relayout of the object when the indentation level
 * has changed.  In this case, we need to relayout the previous
 * paragraph and the following one, because their padding might change
 * after the level change. */
static void
relayout_with_siblings (HTMLClueFlow *flow,
                        HTMLEngine *engine)
{
	if (engine == NULL)
		return;

	/* FIXME this is ugly and inefficient.  */

	if (HTML_OBJECT (flow)->prev != NULL)
		relayout_and_draw (HTML_OBJECT (flow)->prev, engine);

	relayout_and_draw (HTML_OBJECT (flow), engine);

	if (HTML_OBJECT (flow)->next != NULL)
		relayout_and_draw (HTML_OBJECT (flow)->next, engine);
}


void
html_clueflow_set_style (HTMLClueFlow *flow,
                         HTMLEngine *engine,
                         HTMLClueFlowStyle style)
{
	g_return_if_fail (flow != NULL);
	g_return_if_fail (engine != NULL);
	g_return_if_fail (HTML_IS_ENGINE (engine));

	html_object_change_set_down (HTML_OBJECT (flow), HTML_CHANGE_ALL);
	flow->style = style;
	if (style != HTML_CLUEFLOW_STYLE_LIST_ITEM)
		flow->item_number = 0;

	html_engine_schedule_update (engine);
	/* FIXME - make it more effective: relayout_with_siblings (flow, engine); */
}

GByteArray *
html_clueflow_dup_levels (HTMLClueFlow *flow)
{
	GByteArray *levels;

	levels = g_byte_array_new ();
	copy_levels (levels, flow->levels);

	return levels;
}

void
html_clueflow_set_levels (HTMLClueFlow *flow,
                          HTMLEngine *engine,
                          GByteArray *levels)
{
	HTMLObject *next_relative;

	next_relative = get_next_relative_item (HTML_OBJECT (flow));
	copy_levels (flow->levels, levels);

	update_item_number (HTML_OBJECT (flow), engine);
	if (next_relative)
		update_item_number (next_relative, engine);

	relayout_with_siblings (flow, engine);
}

void
html_clueflow_set_item_type (HTMLClueFlow *flow,
                             HTMLEngine *engine,
                             HTMLListType item_type)
{
	g_return_if_fail (flow != NULL);
	g_return_if_fail (engine != NULL);
	g_return_if_fail (HTML_IS_ENGINE (engine));

	html_object_change_set (HTML_OBJECT (flow), HTML_CHANGE_ALL);

	if ((is_blockquote (item_type) != is_blockquote (flow->item_type)) && flow->levels->len)
		flow->levels->data[flow->levels->len - 1] = item_type;

	flow->item_type = item_type;

	update_item_number (HTML_OBJECT (flow), engine);
	if (!items_are_relative (HTML_OBJECT (flow), HTML_OBJECT (flow)->next) && HTML_OBJECT (flow)->next)
		update_item_number (HTML_OBJECT (flow)->next, engine);

	html_engine_schedule_update (engine);
	/* FIXME - make it more effective: relayout_with_siblings (flow, engine); */
}

HTMLClueFlowStyle
html_clueflow_get_style (HTMLClueFlow *flow)
{
	g_return_val_if_fail (flow != NULL, HTML_CLUEFLOW_STYLE_NORMAL);

	return flow->style;
}

HTMLListType
html_clueflow_get_item_type (HTMLClueFlow *flow)
{
	g_return_val_if_fail (flow != NULL, HTML_LIST_TYPE_BLOCKQUOTE);

	return flow->item_type;
}

void
html_clueflow_set_halignment (HTMLClueFlow *flow,
                              HTMLEngine *engine,
                              HTMLHAlignType alignment)
{
	g_return_if_fail (flow != NULL);
	g_return_if_fail (engine != NULL);
	g_return_if_fail (HTML_IS_ENGINE (engine));

	HTML_CLUE (flow)->halign = alignment;

	relayout_and_draw (HTML_OBJECT (flow), engine);
}

void
html_clueflow_modify_indentation_by_delta (HTMLClueFlow *flow,
                                           HTMLEngine *engine,
                                           gint indentation_delta,
                                           guint8 *indentation_levels)
{
	HTMLObject *next_relative;
	gint indentation;
	g_return_if_fail (flow != NULL);
	g_return_if_fail (engine != NULL);
	g_return_if_fail (HTML_IS_ENGINE (engine));

	next_relative = get_next_relative_item (HTML_OBJECT (flow));

	indentation = flow->levels->len + indentation_delta;
	indentation = indentation < 0 ? 0 : indentation;

	if (indentation_delta > 0)
		g_byte_array_append (flow->levels, indentation_levels, indentation_delta);
	else {
		g_byte_array_set_size (flow->levels, indentation);
		if (is_item (flow) && indentation < 1 && indentation_delta < 0) {
			html_clueflow_set_style (flow, engine, HTML_CLUEFLOW_STYLE_NORMAL);
			html_clueflow_set_item_type (flow, engine, HTML_LIST_TYPE_BLOCKQUOTE);
			html_object_change_set_down (HTML_OBJECT (flow), HTML_CHANGE_ALL);
		}
	}

	update_item_number (HTML_OBJECT (flow), engine);
	if (next_relative)
		update_item_number (next_relative, engine);
	relayout_with_siblings (flow, engine);
}

void
html_clueflow_set_indentation (HTMLClueFlow *flow,
                               HTMLEngine *engine,
                               gint indentation,
                               guint8 *indentation_levels)
{
	HTMLObject *next_relative;
	gint i;
	g_return_if_fail (flow != NULL);
	g_return_if_fail (engine != NULL);
	g_return_if_fail (HTML_IS_ENGINE (engine));

	if (indentation < 0)
		indentation = 0;

	next_relative = get_next_relative_item (HTML_OBJECT (flow));

	g_byte_array_set_size (flow->levels, indentation);

	i = indentation;
	while (i--)
		flow->levels->data[i] = indentation_levels[i];

	update_item_number (HTML_OBJECT (flow), engine);
	if (next_relative)
		update_item_number (next_relative, engine);
	relayout_with_siblings (flow, engine);
}

guint8
html_clueflow_get_indentation (HTMLClueFlow *flow)
{
	g_return_val_if_fail (flow != NULL, 0);

	/* FIXME levels */
	return flow->levels->len;
}

#if 0
void
html_clueflow_set_properties (HTMLClueFlow *flow,
                              HTMLEngine *engine,
                              HTMLClueFlowStyle style,
                              guint8 indentation,
                              HTMLHAlignType alignment)
{
	g_return_if_fail (flow != NULL);
	g_return_if_fail (engine != NULL);
	g_return_if_fail (HTML_IS_ENGINE (engine));

	HTML_CLUE (flow)->halign = alignment;

	flow->style = style;
	html_clueflow_set_indentation (flow, engine, indentation);

	relayout_and_draw (HTML_OBJECT (flow), engine);
}

void
html_clueflow_get_properties (HTMLClueFlow *flow,
                              HTMLClueFlowStyle *style_return,
                              guint8 *indentation_return,
                              HTMLHAlignType *alignment_return)
{
	g_return_if_fail (flow != NULL);

	if (style_return != NULL)
		*style_return = flow->style;
	if (indentation_return != NULL)
		/* FIXME levels */
		*indentation_return = flow->levels->len;
	if (alignment_return != NULL)
		*alignment_return = HTML_CLUE (flow)->halign;
}
#endif
/* spell checking */

#include "htmlinterval.h"

static guint
get_text_bytes (HTMLClue *clue,
                HTMLInterval *i)
{
	HTMLObject *obj;
	guint bytes;

	g_assert (i);
	g_assert (i->from.object);
	g_assert (i->to.object);

	bytes = 0;
	obj = html_interval_get_head (i, HTML_OBJECT (clue));
	while (obj) {
		bytes += html_interval_get_bytes (i, obj);
		if (obj == i->to.object)
			break;
		obj = html_object_next_not_slave (obj);
	}

	return bytes;
}

static gchar *
get_text (HTMLClue *clue,
          HTMLInterval *i)
{
	HTMLObject *obj;
	guint cb, bytes = 0;
	gchar *text, *ct;

	bytes        = get_text_bytes (clue, i);
	ct           = text = g_malloc (bytes + 1);
	text[bytes] = 0;

	obj = html_interval_get_head (i, HTML_OBJECT (clue));
	while (obj) {
		cb = html_interval_get_bytes (i, obj);
		if (html_object_is_text (obj))
			strncpy (ct, HTML_TEXT (obj)->text + html_interval_get_start_index (i, obj), cb);
		else
			if (cb == 1) *ct = ' ';
			else memset (ct, ' ', cb);
		ct += cb;
		if (obj == i->to.object)
			break;
		obj = html_object_next_not_slave (obj);
	}

	/* printf ("get_text: %d \"%s\"\n", bytes, text); */

	return text;
}

static HTMLObject *
next_obj_and_clear (HTMLObject *obj,
                    guint *off,
                    gboolean *is_text,
                    HTMLInterval *i)
{
	*off += html_object_get_length (obj) - html_interval_get_start (i, obj);
	obj = obj->next;
	if (obj && (*is_text = html_object_is_text (obj)))
		html_text_spell_errors_clear_interval (HTML_TEXT (obj), i);

	return obj;
}

static HTMLObject *
spell_check_word_mark (HTMLObject *obj,
                       const gchar *text,
                       const gchar *word,
                       guint *off,
                       HTMLInterval *i)
{
	guint w_off, ioff;
	guint len = g_utf8_strlen (word, -1);
	gboolean is_text;

	/* printf ("[not in dictionary word off: %d off: %d]\n", word - text, *off); */
	is_text = html_object_is_text (obj);
	w_off   = g_utf8_pointer_to_offset (text, word);
	while (obj && (!is_text || (is_text && *off + html_interval_get_length (i, obj) <= w_off)))
		obj = next_obj_and_clear (obj, off, &is_text, i);

	/* printf ("is_text: %d len: %d obj: %p off: %d\n", is_text, len, obj, *off); */
	if (obj && is_text) {
		gchar *t;
		guint tlen;
		guint toff;

		while (len) {
			toff  = w_off - *off;
			ioff  = html_interval_get_start (i, obj);
			tlen  = MIN (HTML_TEXT (obj)->text_len - toff - ioff, len);
			t     = HTML_TEXT (obj)->text;
			g_assert (!strncmp (word, g_utf8_offset_to_pointer (t, toff + ioff),
					    g_utf8_offset_to_pointer (t, toff + ioff + tlen)
					    - g_utf8_offset_to_pointer (t, toff + ioff)));
			/* printf ("add spell error - word: %s off: %d beg: %s len: %d\n",
			 * word, *off, HTML_TEXT (obj)->text + toff, tlen); */
			html_text_spell_errors_add (HTML_TEXT (obj),
						    ioff + toff, tlen);
			len     -= tlen;
			w_off   += tlen;
			word     = g_utf8_offset_to_pointer (word, tlen);
			if (len)
				do obj = next_obj_and_clear (obj, off, &is_text, i); while (obj && !is_text);
			/* printf ("off: %d\n", *off); */
			g_assert (!len || obj);
		}
	}

	return obj;
}

static gchar *
begin_of_word (gchar *text,
               gchar *ct,
               gboolean *cited)
{
	gunichar uc;

	*cited = FALSE;
	do
		uc = g_utf8_get_char (ct);
	while (!html_selection_spell_word (uc, cited) && (ct = g_utf8_next_char (ct)) && *ct);

	return ct;
}

static gchar *
end_of_word (gchar *ct,
             gboolean cited)
{
	gunichar uc, ucn;
	gchar *cn;
	gboolean cited2;

	cited2 = FALSE;
	while (*ct
	       && (uc = g_utf8_get_char (ct))
	       && (cn = g_utf8_next_char (ct))
	       && (html_selection_spell_word (uc, &cited2)
		   || (!cited && cited2)
		   || (cited && cited2 && (ucn = g_utf8_get_char (cn)) && g_unichar_isalpha (ucn)))) {
		ct = cn;
		cited2 = FALSE;
	}

	return ct;
}

static void
queue_draw (HTMLObject *o,
            HTMLEngine *e,
            HTMLInterval *i)
{
	if (html_object_is_text (o))
		html_text_queue_draw (HTML_TEXT (o), e, html_interval_get_start (i, o), html_interval_get_length (i, o));
}

void
html_clueflow_spell_check (HTMLClueFlow *flow,
                           HTMLEngine *e,
                           HTMLInterval *interval)
{
	HTMLObject *obj;
	HTMLClue *clue;
	guint off;
	gchar *text, *ct, *word;
	HTMLInterval *new_interval = NULL;

	g_return_if_fail (flow != NULL);
	g_return_if_fail (HTML_OBJECT_TYPE (flow) == HTML_TYPE_CLUEFLOW);

	/* if (interval)
	 * printf ("html_clueflow_spell_check %p %p %d %d\n", i->from, i->to, i->from_offset, i->to_offset); */

	clue = HTML_CLUE (flow);
	if (!e->widget->editor_api || !gtk_html_get_inline_spelling (e->widget) || !clue || !clue->tail)
		return;

	off  = 0;

	if (!interval) {
		new_interval = html_interval_new (clue->head, clue->tail, 0, html_object_get_length (clue->tail));
		interval = new_interval;
	}

	text = get_text (clue, interval);
	obj  = html_interval_get_head (interval, HTML_OBJECT (flow));
	if (obj && html_object_is_text (obj))
		html_text_spell_errors_clear_interval (HTML_TEXT (obj), interval);

	if (text) {
		ct = text;
		while (*ct) {
			gboolean cited;

			word = ct = begin_of_word (text, ct, &cited);
			ct        =   end_of_word (ct, cited);

			/* test if we have found word */
			if (word != ct) {
				gint result;
				gchar bak;

				bak = *ct;
				*ct = 0;
				/* printf ("off %d going to test word: \"%s\"\n", off, word); */
				result = (*e->widget->editor_api->check_word) (e->widget, word, e->widget->editor_data);

				if (result == 1) {
					gboolean is_text = (obj) ? html_object_is_text (obj) : FALSE;
					while (obj && (!is_text
						       || (off + html_interval_get_length (interval, obj)
							   < g_utf8_pointer_to_offset (text, ct))))
						obj = next_obj_and_clear (obj, &off, &is_text, interval);
				} else if (obj)
						obj = spell_check_word_mark (obj, text, word, &off, interval);

				*ct = bak;
				if (*ct)
					ct = g_utf8_next_char (ct);
			}
		}
		g_free (text);

		if (!html_engine_frozen (e)) {
			/* html_engine_queue_clear (e); */
			html_interval_forall (interval, e, (HTMLObjectForallFunc) queue_draw, interval);
			html_engine_flush_draw_queue (e);
		}
		html_interval_destroy (new_interval);
	}
}

gboolean
html_clueflow_is_empty (HTMLClueFlow *flow)
{
	HTMLClue *clue;
	g_return_val_if_fail (HTML_IS_CLUEFLOW (flow), TRUE);

	clue = HTML_CLUE (flow);

	if (!clue->head
	    || (clue->head && html_object_is_text (clue->head)
		&& HTML_TEXT (clue->head)->text_len == 0 && !html_object_next_not_slave (clue->head)))
		return TRUE;
	return FALSE;
}

gboolean
html_clueflow_contains_table (HTMLClueFlow *flow)
{
	HTMLClue *clue;
	g_return_val_if_fail (HTML_IS_CLUEFLOW (flow), FALSE);

	clue = HTML_CLUE (flow);

	if (clue->head && HTML_IS_TABLE (clue->head))
		return TRUE;

	return FALSE;
}

gint
html_clueflow_get_line_offset (HTMLClueFlow *flow,
                               HTMLPainter *painter,
                               HTMLObject *child)
{
	HTMLObject *o, *head;
	gint line_offset;

	g_assert (HTML_IS_CLUEFLOW (flow));

	if (!html_clueflow_tabs (flow, painter))
		return -1;

	line_offset = 0;

	/* find head */
	o = head = child;
	while (o) {
		o = head->prev;
		if (o) {
			if (o->y + o->descent - 1 < child->y - child->ascent)
				break;
			else
				head = o;
		}
	}

	if (HTML_IS_TEXT_SLAVE (head)) {
		HTMLTextSlave *bol = HTML_TEXT_SLAVE (head);

		html_text_text_line_length (html_text_get_text (bol->owner, bol->posStart),
					    &line_offset, bol->owner->text_len - bol->posStart, NULL);
		head = html_object_next_not_slave (head);
	}

	while (head) {
		if (head == child)
			break;
		line_offset += html_object_get_line_length (head, painter, line_offset);
		head = html_object_next_not_slave (head);
	}
	/* printf ("lo: %d\n", line_offset); */
	return line_offset;
}

gboolean
html_clueflow_tabs (HTMLClueFlow *flow,
                    HTMLPainter *p)
{
	return (flow && HTML_IS_CLUEFLOW (flow) && flow->style == HTML_CLUEFLOW_STYLE_PRE) || HTML_IS_PLAIN_PAINTER (p)
		? TRUE : FALSE;
}

void
html_clueflow_set_item_color (HTMLClueFlow *flow,
                              HTMLColor *color)
{
	if (flow->item_color)
		html_color_unref (flow->item_color);
	if (color)
		html_color_ref (color);
	flow->item_color = color;
}

gboolean
html_clueflow_style_equals (HTMLClueFlow *cf1,
                            HTMLClueFlow *cf2)
{
	if (!cf1 || !cf2
	    || !HTML_IS_CLUEFLOW (cf1) || !HTML_IS_CLUEFLOW (cf2)
	    || cf1->style != cf2->style
	    || (cf1->style == HTML_CLUEFLOW_STYLE_LIST_ITEM && cf1->item_type != cf2->item_type)
	    || !is_levels_equal (cf1, cf2))
		return FALSE;
	return TRUE;
}