evolution/widgets/e-text.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* EText - Text item for evolution.
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Author: Chris Lahey <clahey@umich.edu>
 *
 * A majority of code taken from:
 *
 * Text item type for GnomeCanvas widget
 *
 * GnomeCanvas is basically a port of the Tk toolkit's most excellent
 * canvas widget.  Tk is copyrighted by the Regents of the University
 * of California, Sun Microsystems, and other parties.
 *
 * Copyright (C) 1998 The Free Software Foundation
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx> */

#include <config.h>
#include <math.h>
#include <ctype.h>
#include "e-text.h"
#include <gdk/gdkx.h> /* for BlackPixel */
#include <libart_lgpl/art_affine.h>
#include <libart_lgpl/art_rgb.h>
#include <libart_lgpl/art_rgb_bitmap_affine.h>
#include <gtk/gtkinvisible.h>

#include "e-text-event-processor-emacs-like.h"

enum {
	E_TEXT_RESIZE,
	E_TEXT_CHANGE,
	E_TEXT_LAST_SIGNAL
};

static guint e_text_signals[E_TEXT_LAST_SIGNAL] = { 0 };



/* This defines a line of text */
struct line {
	char *text;	/* Line's text, it is a pointer into the text->text string */
	int length;	/* Line's length in characters */
	int width;	/* Line's width in pixels */
	int ellipsis_length;  /* Length before adding ellipsis */
};



/* Object argument IDs */
enum {
	ARG_0,
	ARG_TEXT,
	ARG_X,
	ARG_Y,
	ARG_FONT,
        ARG_FONTSET,
	ARG_FONT_GDK,
	ARG_ANCHOR,
	ARG_JUSTIFICATION,
	ARG_CLIP_WIDTH,
	ARG_CLIP_HEIGHT,
	ARG_CLIP,
	ARG_X_OFFSET,
	ARG_Y_OFFSET,
	ARG_FILL_COLOR,
	ARG_FILL_COLOR_GDK,
	ARG_FILL_COLOR_RGBA,
	ARG_FILL_STIPPLE,
	ARG_TEXT_WIDTH,
	ARG_TEXT_HEIGHT,
	ARG_EDITABLE,
	ARG_USE_ELLIPSIS,
	ARG_ELLIPSIS,
	ARG_LINE_WRAP,
	ARG_MAX_LINES
};


enum {
	E_SELECTION_PRIMARY,
	E_SELECTION_CLIPBOARD
};
enum {
  TARGET_STRING,
  TARGET_TEXT,
  TARGET_COMPOUND_TEXT
};

static void e_text_class_init (ETextClass *class);
static void e_text_init (EText *text);
static void e_text_destroy (GtkObject *object);
static void e_text_set_arg (GtkObject *object, GtkArg *arg, guint arg_id);
static void e_text_get_arg (GtkObject *object, GtkArg *arg, guint arg_id);

static void e_text_update (GnomeCanvasItem *item, double *affine,
				      ArtSVP *clip_path, int flags);
static void e_text_realize (GnomeCanvasItem *item);
static void e_text_unrealize (GnomeCanvasItem *item);
static void e_text_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
				    int x, int y, int width, int height);
static double e_text_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
				       GnomeCanvasItem **actual_item);
static void e_text_bounds (GnomeCanvasItem *item,
				      double *x1, double *y1, double *x2, double *y2);
static void e_text_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf);
static gint e_text_event (GnomeCanvasItem *item, GdkEvent *event);

static void e_text_command(ETextEventProcessor *tep, ETextEventProcessorCommand *command, gpointer data);

static guint32 e_text_get_event_time (EText *text);

static void e_text_get_selection(EText *text, GdkAtom selection, guint32 time);
static void e_text_supply_selection (EText *text, guint time, GdkAtom selection, guchar *data, gint length);

static GtkWidget *e_text_get_invisible(EText *text);
static void _selection_clear_event (GtkInvisible *invisible,
				    GdkEventSelection *event,
				    EText *text);
static void _selection_get (GtkInvisible *invisible,
			    GtkSelectionData *selection_data,
			    guint info,
			    guint time_stamp,
			    EText *text);
static void _selection_received (GtkInvisible *invisible,
				 GtkSelectionData *selection_data,
				 guint time,
				 EText *text);

static ETextSuckFont *e_suck_font (GdkFont *font);
static void e_suck_font_free (ETextSuckFont *suckfont);


static GnomeCanvasItemClass *parent_class;
static GdkAtom clipboard_atom = GDK_NONE;



/**
 * e_text_get_type:
 * @void: 
 * 
 * Registers the &EText class if necessary, and returns the type ID
 * associated to it.
 * 
 * Return value: The type ID of the &EText class.
 **/
GtkType
e_text_get_type (void)
{
	static GtkType text_type = 0;

	if (!text_type) {
		GtkTypeInfo text_info = {
			"EText",
			sizeof (EText),
			sizeof (ETextClass),
			(GtkClassInitFunc) e_text_class_init,
			(GtkObjectInitFunc) e_text_init,
			NULL, /* reserved_1 */
			NULL, /* reserved_2 */
			(GtkClassInitFunc) NULL
		};

		text_type = gtk_type_unique (gnome_canvas_item_get_type (), &text_info);
	}

	return text_type;
}

/* Class initialization function for the text item */
static void
e_text_class_init (ETextClass *klass)
{
	GtkObjectClass *object_class;
	GnomeCanvasItemClass *item_class;

	object_class = (GtkObjectClass *) klass;
	item_class = (GnomeCanvasItemClass *) klass;

	parent_class = gtk_type_class (gnome_canvas_item_get_type ());

	e_text_signals[E_TEXT_RESIZE] =
		gtk_signal_new ("resize",
				GTK_RUN_LAST,
				object_class->type,
				GTK_SIGNAL_OFFSET (ETextClass, resize),
				gtk_marshal_NONE__NONE,
				GTK_TYPE_NONE, 0);


	e_text_signals[E_TEXT_CHANGE] =
		gtk_signal_new ("change",
				GTK_RUN_LAST,
				object_class->type,
				GTK_SIGNAL_OFFSET (ETextClass, change),
				gtk_marshal_NONE__NONE,
				GTK_TYPE_NONE, 0);


	gtk_object_class_add_signals (object_class, e_text_signals, E_TEXT_LAST_SIGNAL);
  
	gtk_object_add_arg_type ("EText::text",
				 GTK_TYPE_STRING, GTK_ARG_READWRITE, ARG_TEXT);
	gtk_object_add_arg_type ("EText::x",
				 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X);
	gtk_object_add_arg_type ("EText::y",
				 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y);
	gtk_object_add_arg_type ("EText::font",
				 GTK_TYPE_STRING, GTK_ARG_WRITABLE, ARG_FONT);
	gtk_object_add_arg_type ("EText::fontset",
				 GTK_TYPE_STRING, GTK_ARG_WRITABLE, ARG_FONTSET);
	gtk_object_add_arg_type ("EText::font_gdk",
				 GTK_TYPE_GDK_FONT, GTK_ARG_READWRITE, ARG_FONT_GDK);
	gtk_object_add_arg_type ("EText::anchor",
				 GTK_TYPE_ANCHOR_TYPE, GTK_ARG_READWRITE, ARG_ANCHOR);
	gtk_object_add_arg_type ("EText::justification",
				 GTK_TYPE_JUSTIFICATION, GTK_ARG_READWRITE, ARG_JUSTIFICATION);
	gtk_object_add_arg_type ("EText::clip_width",
				 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_CLIP_WIDTH);
	gtk_object_add_arg_type ("EText::clip_height",
				 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_CLIP_HEIGHT);
	gtk_object_add_arg_type ("EText::clip",
				 GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_CLIP);
	gtk_object_add_arg_type ("EText::x_offset",
				 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X_OFFSET);
	gtk_object_add_arg_type ("EText::y_offset",
				 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y_OFFSET);
	gtk_object_add_arg_type ("EText::fill_color",
				 GTK_TYPE_STRING, GTK_ARG_WRITABLE, ARG_FILL_COLOR);
	gtk_object_add_arg_type ("EText::fill_color_gdk",
				 GTK_TYPE_GDK_COLOR, GTK_ARG_READWRITE, ARG_FILL_COLOR_GDK);
	gtk_object_add_arg_type ("EText::fill_color_rgba",
				 GTK_TYPE_UINT, GTK_ARG_READWRITE, ARG_FILL_COLOR_RGBA);
	gtk_object_add_arg_type ("EText::fill_stipple",
				 GTK_TYPE_GDK_WINDOW, GTK_ARG_READWRITE, ARG_FILL_STIPPLE);
	gtk_object_add_arg_type ("EText::text_width",
				 GTK_TYPE_DOUBLE, GTK_ARG_READABLE, ARG_TEXT_WIDTH);
	gtk_object_add_arg_type ("EText::text_height",
				 GTK_TYPE_DOUBLE, GTK_ARG_READABLE, ARG_TEXT_HEIGHT);
	gtk_object_add_arg_type ("EText::editable",
				 GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_EDITABLE);
	gtk_object_add_arg_type ("EText::use_ellipsis",
				 GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_USE_ELLIPSIS);
	gtk_object_add_arg_type ("EText::ellipsis",
				 GTK_TYPE_STRING, GTK_ARG_READWRITE, ARG_ELLIPSIS);
	gtk_object_add_arg_type ("EText::line_wrap",
				 GTK_TYPE_BOOL, GTK_ARG_READWRITE, ARG_LINE_WRAP);
	gtk_object_add_arg_type ("EText::max_lines",
				 GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_MAX_LINES);

	if (!clipboard_atom)
		clipboard_atom = gdk_atom_intern ("CLIPBOARD", FALSE);



	klass->resize = NULL;
	klass->change = NULL;

	object_class->destroy = e_text_destroy;
	object_class->set_arg = e_text_set_arg;
	object_class->get_arg = e_text_get_arg;

	item_class->update = e_text_update;
	item_class->realize = e_text_realize;
	item_class->unrealize = e_text_unrealize;
	item_class->draw = e_text_draw;
	item_class->point = e_text_point;
	item_class->bounds = e_text_bounds;
	item_class->render = e_text_render;
	item_class->event = e_text_event;
}

/* Object initialization function for the text item */
static void
e_text_init (EText *text)
{
	text->x = 0.0;
	text->y = 0.0;
	text->anchor = GTK_ANCHOR_CENTER;
	text->justification = GTK_JUSTIFY_LEFT;
	text->clip_width = 0.0;
	text->clip_height = 0.0;
	text->xofs = 0.0;
	text->yofs = 0.0;

	text->ellipsis = NULL;
	text->use_ellipsis = FALSE;
	text->ellipsis_width = 0;

	text->editable = FALSE;
	text->editing = FALSE;
	text->xofs_edit = 0;
	
	text->selection_start = 0;
	text->selection_end = 0;
	text->select_by_word = FALSE;

	text->timeout_id = 0;
	text->timer = NULL;

	text->lastx = 0;
	text->lasty = 0;
	text->last_state = 0;

	text->scroll_start = 0;
	text->show_cursor = TRUE;
	text->button_down = FALSE;
	
	text->tep = NULL;

	text->has_selection = FALSE;
	
	text->invisible = NULL;
	text->primary_selection = NULL;
	text->primary_length = 0;
	text->clipboard_selection = NULL;
	text->clipboard_length = 0;

	text->pointer_in = FALSE;
	text->default_cursor_shown = TRUE;

	text->line_wrap = FALSE;
	text->max_lines = -1;
}

/* Destroy handler for the text item */
static void
e_text_destroy (GtkObject *object)
{
	EText *text;

	g_return_if_fail (object != NULL);
	g_return_if_fail (GNOME_IS_CANVAS_TEXT (object));

	text = E_TEXT (object);

	if (text->text)
		g_free (text->text);

	if (text->tep)
		gtk_object_unref (GTK_OBJECT(text->tep));
	
	if (text->invisible)
		gtk_object_unref (GTK_OBJECT(text->invisible));

	if (text->lines)
		g_free (text->lines);

	if (text->font)
		gdk_font_unref (text->font);

	if (text->suckfont)
		e_suck_font_free (text->suckfont);

	if (text->stipple)
		gdk_bitmap_unref (text->stipple);

	if (GTK_OBJECT_CLASS (parent_class)->destroy)
		(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

static void
get_bounds_item_relative (EText *text, double *px1, double *py1, double *px2, double *py2)
{
	GnomeCanvasItem *item;
	double x, y;
	double clip_x, clip_y;
	int old_height;

	item = GNOME_CANVAS_ITEM (text);

	x = text->x;
	y = text->y;

	clip_x = x;
	clip_y = y;

	/* Calculate text dimensions */

	old_height = text->height;

	if (text->text && text->font)
		text->height = (text->font->ascent + text->font->descent) * text->num_lines;
	else
		text->height = 0;

	if (old_height != text->height)
		gtk_signal_emit_by_name (GTK_OBJECT (text), "resize");

	/* Anchor text */

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_W:
	case GTK_ANCHOR_SW:
		break;

	case GTK_ANCHOR_N:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_S:
		x -= text->max_width / 2;
		clip_x -= text->clip_width / 2;
		break;

	case GTK_ANCHOR_NE:
	case GTK_ANCHOR_E:
	case GTK_ANCHOR_SE:
		x -= text->max_width;
		clip_x -= text->clip_width;
		break;
	}

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_N:
	case GTK_ANCHOR_NE:
		break;

	case GTK_ANCHOR_W:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_E:
		y -= text->height / 2;
		clip_y -= text->clip_height / 2;
		break;

	case GTK_ANCHOR_SW:
	case GTK_ANCHOR_S:
	case GTK_ANCHOR_SE:
		y -= text->height;
		clip_y -= text->clip_height;
		break;
	}

	/* Bounds */

	if (text->clip) {
		/* maybe do bbox intersection here? */
		*px1 = clip_x;
		*py1 = clip_y;
		*px2 = clip_x + text->clip_width;
		*py2 = clip_y + text->clip_height;
	} else {
		*px1 = x;
		*py1 = y;
		*px2 = x + text->max_width;
		*py2 = y + text->height;
	}
}

static void
get_bounds (EText *text, double *px1, double *py1, double *px2, double *py2)
{
	GnomeCanvasItem *item;
	double wx, wy;
	int old_height;

	item = GNOME_CANVAS_ITEM (text);

	/* Get canvas pixel coordinates for text position */

	wx = text->x;
	wy = text->y;
	gnome_canvas_item_i2w (item, &wx, &wy);
	gnome_canvas_w2c (item->canvas, wx + text->xofs, wy + text->yofs, &text->cx, &text->cy);

	/* Get canvas pixel coordinates for clip rectangle position */

	gnome_canvas_w2c (item->canvas, wx, wy, &text->clip_cx, &text->clip_cy);
	text->clip_cwidth = text->clip_width * item->canvas->pixels_per_unit;
	text->clip_cheight = text->clip_height * item->canvas->pixels_per_unit;

	/* Calculate text dimensions */

	old_height = text->height;

	if (text->text && text->font)
		text->height = (text->font->ascent + text->font->descent) * text->num_lines;
	else
		text->height = 0;

	if (old_height != text->height)
		gtk_signal_emit_by_name (GTK_OBJECT (text), "resize");

	/* Anchor text */

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_W:
	case GTK_ANCHOR_SW:
		break;

	case GTK_ANCHOR_N:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_S:
		text->cx -= text->max_width / 2;
		text->clip_cx -= text->clip_cwidth / 2;
		break;

	case GTK_ANCHOR_NE:
	case GTK_ANCHOR_E:
	case GTK_ANCHOR_SE:
		text->cx -= text->max_width;
		text->clip_cx -= text->clip_cwidth;
		break;
	}

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_N:
	case GTK_ANCHOR_NE:
		break;

	case GTK_ANCHOR_W:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_E:
		text->cy -= text->height / 2;
		text->clip_cy -= text->clip_cheight / 2;
		break;

	case GTK_ANCHOR_SW:
	case GTK_ANCHOR_S:
	case GTK_ANCHOR_SE:
		text->cy -= text->height;
		text->clip_cy -= text->clip_cheight;
		break;
	}

	/* Bounds */

	if (text->clip) {
		*px1 = text->clip_cx;
		*py1 = text->clip_cy;
		*px2 = text->clip_cx + text->clip_cwidth;
		*py2 = text->clip_cy + text->clip_cheight;
	} else {
		*px1 = text->cx;
		*py1 = text->cy;
		*px2 = text->cx + text->max_width;
		*py2 = text->cy + text->height;
	}
}

/* Recalculates the bounding box of the text item.  The bounding box is defined
 * by the text's extents if the clip rectangle is disabled.  If it is enabled,
 * the bounding box is defined by the clip rectangle itself.
 */
static void
recalc_bounds (EText *text)
{
	GnomeCanvasItem *item;

	item = GNOME_CANVAS_ITEM (text);

	get_bounds (text, &item->x1, &item->y1, &item->x2, &item->y2);

	gnome_canvas_group_child_bounds (GNOME_CANVAS_GROUP (item->parent), item);
}

static void
calc_ellipsis (EText *text)
{
	if (text->font)
		text->ellipsis_width = 
			gdk_text_width (text->font,
					text->ellipsis ? text->ellipsis : "...",
					text->ellipsis ? strlen (text->ellipsis) : 3);
}

/* Calculates the line widths (in pixels) of the text's splitted lines */
static void
calc_line_widths (EText *text)
{
	struct line *lines;
	int i;
	int j;

	lines = text->lines;
	text->max_width = 0;

	if (!lines)
		return;

	for (i = 0; i < text->num_lines; i++) {
		if (lines->length != 0) {
			if (text->font) {
				lines->width = gdk_text_width (text->font,
							       lines->text, lines->length);
				lines->ellipsis_length = 0;
			} else {
				lines->width = 0;
			}
			
			if (text->clip && 
			    text->use_ellipsis &&
			    ! text->editing &&
			    lines->width > text->clip_width) {
				if (text->font) {
					lines->ellipsis_length = 0;
					for (j = 0; j < lines->length; j++ ) {
						if (gdk_text_width (text->font, lines->text, j) + text->ellipsis_width <= text->clip_width)
							lines->ellipsis_length = j;
						else
							break;
					}
				}
				else
					lines->ellipsis_length = 0;
				lines->width = gdk_text_width (text->font, lines->text, lines->ellipsis_length) +
					text->ellipsis_width;
			}
			else
				lines->ellipsis_length = lines->length;

			if (lines->width > text->max_width)
				text->max_width = lines->width;
		}

		lines++;
	}
}

/* Splits the text of the text item into lines */
static void
split_into_lines (EText *text)
{
	char *p;
	struct line *lines;
	int len;
	int line_num;
	char *laststart;
	char *lastend;
	char *linestart;

	/* Free old array of lines */

	if (text->lines)
		g_free (text->lines);

	text->lines = NULL;
	text->num_lines = 0;

	if (!text->text)
		return;

	/* First, count the number of lines */

	lastend = text->text;
	laststart = text->text;
	linestart = text->text;

	for (p = text->text; *p; p++) {
		if (text->line_wrap && (*p == ' ' || *p == '\n')) {
			if ( laststart != lastend
			     && gdk_text_width(text->font,
					       linestart,
					       p - linestart)
			     > text->clip_width ) {
				text->num_lines ++;
				linestart = laststart;
				laststart = p + 1;
				lastend = p;
			} else if (*p == ' ') {
				laststart = p + 1;
				lastend = p;
			}
		} 
		if (*p == '\n') {
			text->num_lines ++;
			lastend = p + 1;
			laststart = p + 1;
			linestart = p + 1;
		} 
	}

	if (text->line_wrap) {
		if ( laststart != lastend
		     && gdk_text_width(text->font,
				       linestart,
				       p - linestart)
		     > text->clip_width ) {
			text->num_lines ++;
		}
	} 

	text->num_lines++;

	if ( (!text->editing) && text->max_lines != -1 && text->num_lines > text->max_lines ) {
		text->num_lines = text->max_lines;
	}

	/* Allocate array of lines and calculate split positions */

	text->lines = lines = g_new0 (struct line, text->num_lines);
	len = 0;
	line_num = 1;
	lastend = text->text;
	laststart = text->text;

	for (p = text->text; line_num < text->num_lines && *p; p++) {
		gboolean handled = FALSE;
		if (len == 0)
			lines->text = p;
		if (text->line_wrap && (*p == ' ' || *p == '\n')) {
			if ( gdk_text_width(text->font,
					    lines->text,
					    p - lines->text)
			     > text->clip_width 
			     && laststart != lastend ) {
				lines->length = lastend - lines->text;
				lines++;
				line_num ++;
				len = p - laststart;
				lines->text = laststart;
				laststart = p + 1;
				lastend = p;
			} else if (*p == ' ') {
				laststart = p + 1;
				lastend = p;
				len ++;
			}
			handled = TRUE;
		} 
		if ( line_num >= text->num_lines )
			break;
		if (*p == '\n') {
			lines->length = p - lines->text;
			lines++;
			line_num ++;
			len = 0;
			lastend = p + 1;
			laststart = p + 1;
			handled = TRUE;
		} 
		if (!handled)
			len++;
	}

	if ( line_num < text->num_lines && text->line_wrap ) {
		if ( gdk_text_width(text->font,
				    lines->text,
				    p - lines->text)
		     > text->clip_width 
		     && laststart != lastend ) {
			lines->length = lastend - lines->text;
			lines++;
			line_num ++;
			len = p - laststart;
			lines->text = laststart;
			laststart = p + 1;
			lastend = p;
		}
	} 
	
	if (len == 0)
		lines->text = p;
	lines->length = strlen(lines->text);

	calc_line_widths (text);
}

/* Convenience function to set the text's GC's foreground color */
static void
set_text_gc_foreground (EText *text)
{
	GdkColor c;

	if (!text->gc)
		return;

	c.pixel = text->pixel;
	gdk_gc_set_foreground (text->gc, &c);
}

/* Sets the stipple pattern for the text */
static void
set_stipple (EText *text, GdkBitmap *stipple, int reconfigure)
{
	if (text->stipple && !reconfigure)
		gdk_bitmap_unref (text->stipple);

	text->stipple = stipple;
	if (stipple && !reconfigure)
		gdk_bitmap_ref (stipple);

	if (text->gc) {
		if (stipple) {
			gdk_gc_set_stipple (text->gc, stipple);
			gdk_gc_set_fill (text->gc, GDK_STIPPLED);
		} else
			gdk_gc_set_fill (text->gc, GDK_SOLID);
	}
}

/* Set_arg handler for the text item */
static void
e_text_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
	GnomeCanvasItem *item;
	EText *text;
	GdkColor color = { 0, 0, 0, 0, };
	GdkColor *pcolor;
	gboolean color_changed;
	int have_pixel;

	item = GNOME_CANVAS_ITEM (object);
	text = E_TEXT (object);

	color_changed = FALSE;
	have_pixel = FALSE;

	switch (arg_id) {
	case ARG_TEXT:
		if (text->text)
			g_free (text->text);

		text->text = g_strdup (GTK_VALUE_STRING (*arg));
		split_into_lines (text);
		recalc_bounds (text);
		break;

	case ARG_X:
		text->x = GTK_VALUE_DOUBLE (*arg);
		recalc_bounds (text);
		break;

	case ARG_Y:
		text->y = GTK_VALUE_DOUBLE (*arg);
		recalc_bounds (text);
		break;

	case ARG_FONT:
		if (text->font)
			gdk_font_unref (text->font);

		text->font = gdk_font_load (GTK_VALUE_STRING (*arg));

		if (item->canvas->aa) {
			if (text->suckfont)
				e_suck_font_free (text->suckfont);

			text->suckfont = e_suck_font (text->font);
		}
		
		calc_ellipsis (text);
		if ( text->line_wrap )
			split_into_lines (text);
		else
			calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_FONTSET:
		if (text->font)
			gdk_font_unref (text->font);

		text->font = gdk_fontset_load (GTK_VALUE_STRING (*arg));

		if (item->canvas->aa) {
			if (text->suckfont)
				e_suck_font_free (text->suckfont);

			text->suckfont = e_suck_font (text->font);
		}

		calc_ellipsis (text);
		if ( text->line_wrap )
			split_into_lines (text);
		else
			calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_FONT_GDK:
		if (text->font)
			gdk_font_unref (text->font);

		text->font = GTK_VALUE_BOXED (*arg);
		gdk_font_ref (text->font);

		if (item->canvas->aa) {
			if (text->suckfont)
				e_suck_font_free (text->suckfont);

			text->suckfont = e_suck_font (text->font);
		}
		calc_ellipsis (text);
		if ( text->line_wrap )
			split_into_lines (text);
		else
			calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_ANCHOR:
		text->anchor = GTK_VALUE_ENUM (*arg);
		recalc_bounds (text);
		break;

	case ARG_JUSTIFICATION:
		text->justification = GTK_VALUE_ENUM (*arg);
		break;

	case ARG_CLIP_WIDTH:
		text->clip_width = fabs (GTK_VALUE_DOUBLE (*arg));
		calc_ellipsis (text);
		if ( text->line_wrap )
			split_into_lines (text);
		else
			calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_CLIP_HEIGHT:
		text->clip_height = fabs (GTK_VALUE_DOUBLE (*arg));
		recalc_bounds (text);
		break;

	case ARG_CLIP:
		text->clip = GTK_VALUE_BOOL (*arg);
		calc_ellipsis (text);
		if ( text->line_wrap )
			split_into_lines (text);
		else
			calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_X_OFFSET:
		text->xofs = GTK_VALUE_DOUBLE (*arg);
		recalc_bounds (text);
		break;

	case ARG_Y_OFFSET:
		text->yofs = GTK_VALUE_DOUBLE (*arg);
		recalc_bounds (text);
		break;

        case ARG_FILL_COLOR:
		if (GTK_VALUE_STRING (*arg))
			gdk_color_parse (GTK_VALUE_STRING (*arg), &color);

		text->rgba = ((color.red & 0xff00) << 16 |
			      (color.green & 0xff00) << 8 |
			      (color.blue & 0xff00) |
			      0xff);
		color_changed = TRUE;
		break;

	case ARG_FILL_COLOR_GDK:
		pcolor = GTK_VALUE_BOXED (*arg);
		if (pcolor) {
			color = *pcolor;
			gdk_color_context_query_color (item->canvas->cc, &color);
			have_pixel = TRUE;
		}

		text->rgba = ((color.red & 0xff00) << 16 |
			      (color.green & 0xff00) << 8 |
			      (color.blue & 0xff00) |
			      0xff);
		color_changed = TRUE;
		break;

        case ARG_FILL_COLOR_RGBA:
		text->rgba = GTK_VALUE_UINT (*arg);
		color_changed = TRUE;
		break;

	case ARG_FILL_STIPPLE:
		set_stipple (text, GTK_VALUE_BOXED (*arg), FALSE);
		break;

	case ARG_EDITABLE:
		text->editable = GTK_VALUE_BOOL (*arg);
		break;

	case ARG_USE_ELLIPSIS:
		text->use_ellipsis = GTK_VALUE_BOOL (*arg);
		calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_ELLIPSIS:
		if (text->ellipsis)
			g_free (text->ellipsis);

		text->ellipsis = g_strdup (GTK_VALUE_STRING (*arg));
		calc_ellipsis (text);
		calc_line_widths (text);
		recalc_bounds (text);
		break;

	case ARG_LINE_WRAP:
		text->line_wrap = GTK_VALUE_BOOL (*arg);
		split_into_lines (text);
		recalc_bounds (text);
		break;

	case ARG_MAX_LINES:
		text->max_lines = GTK_VALUE_INT (*arg);
		split_into_lines (text);
		recalc_bounds (text);
		break;

	default:
		break;
	}

	if (color_changed) {
		if (have_pixel)
			text->pixel = color.pixel;
		else
			text->pixel = gnome_canvas_get_color_pixel (item->canvas, text->rgba);

		if (!item->canvas->aa)
			set_text_gc_foreground (text);

		gnome_canvas_item_request_update (item);
	}
}

/* Get_arg handler for the text item */
static void
e_text_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
{
	EText *text;
	GdkColor *color;

	text = E_TEXT (object);

	switch (arg_id) {
	case ARG_TEXT:
		GTK_VALUE_STRING (*arg) = g_strdup (text->text);
		break;

	case ARG_X:
		GTK_VALUE_DOUBLE (*arg) = text->x;
		break;

	case ARG_Y:
		GTK_VALUE_DOUBLE (*arg) = text->y;
		break;

	case ARG_FONT_GDK:
		GTK_VALUE_BOXED (*arg) = text->font;
		break;

	case ARG_ANCHOR:
		GTK_VALUE_ENUM (*arg) = text->anchor;
		break;

	case ARG_JUSTIFICATION:
		GTK_VALUE_ENUM (*arg) = text->justification;
		break;

	case ARG_CLIP_WIDTH:
		GTK_VALUE_DOUBLE (*arg) = text->clip_width;
		break;

	case ARG_CLIP_HEIGHT:
		GTK_VALUE_DOUBLE (*arg) = text->clip_height;
		break;

	case ARG_CLIP:
		GTK_VALUE_BOOL (*arg) = text->clip;
		break;

	case ARG_X_OFFSET:
		GTK_VALUE_DOUBLE (*arg) = text->xofs;
		break;

	case ARG_Y_OFFSET:
		GTK_VALUE_DOUBLE (*arg) = text->yofs;
		break;

	case ARG_FILL_COLOR_GDK:
		color = g_new (GdkColor, 1);
		color->pixel = text->pixel;
		gdk_color_context_query_color (text->item.canvas->cc, color);
		GTK_VALUE_BOXED (*arg) = color;
		break;

	case ARG_FILL_COLOR_RGBA:
		GTK_VALUE_UINT (*arg) = text->rgba;
		break;

	case ARG_FILL_STIPPLE:
		GTK_VALUE_BOXED (*arg) = text->stipple;
		break;

	case ARG_TEXT_WIDTH:
		GTK_VALUE_DOUBLE (*arg) = text->max_width / text->item.canvas->pixels_per_unit;
		break;

	case ARG_TEXT_HEIGHT:
		GTK_VALUE_DOUBLE (*arg) = text->height / text->item.canvas->pixels_per_unit;
		break;

	case ARG_EDITABLE:
		GTK_VALUE_BOOL (*arg) = text->editable;
		break;

	case ARG_USE_ELLIPSIS:
		GTK_VALUE_BOOL (*arg) = text->use_ellipsis;
		break;

	case ARG_ELLIPSIS:
		GTK_VALUE_STRING (*arg) = g_strdup (text->ellipsis);
		break;

	case ARG_LINE_WRAP:
		GTK_VALUE_BOOL (*arg) = text->line_wrap;
		break;

	case ARG_MAX_LINES:
		GTK_VALUE_INT (*arg) = text->max_lines;
		break;

	default:
		arg->type = GTK_TYPE_INVALID;
		break;
	}
}

/* Update handler for the text item */
static void
e_text_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
{
	EText *text;
	double x1, y1, x2, y2;
	ArtDRect i_bbox, c_bbox;
	int i;

	text = E_TEXT (item);

	if (parent_class->update)
		(* parent_class->update) (item, affine, clip_path, flags);

	if (!item->canvas->aa) {
		set_text_gc_foreground (text);
		set_stipple (text, text->stipple, TRUE);
		get_bounds (text, &x1, &y1, &x2, &y2);

		gnome_canvas_update_bbox (item, x1, y1, x2, y2);
	} else {
		/* aa rendering */
		for (i = 0; i < 6; i++)
			text->affine[i] = affine[i];
		get_bounds_item_relative (text, &i_bbox.x0, &i_bbox.y0, &i_bbox.x1, &i_bbox.y1);
		art_drect_affine_transform (&c_bbox, &i_bbox, affine);
		gnome_canvas_update_bbox (item, c_bbox.x0, c_bbox.y0, c_bbox.x1, c_bbox.y1);

	}
}

/* Realize handler for the text item */
static void
e_text_realize (GnomeCanvasItem *item)
{
	EText *text;

	text = E_TEXT (item);

	if (parent_class->realize)
		(* parent_class->realize) (item);

	text->gc = gdk_gc_new (item->canvas->layout.bin_window);
	
	text->i_cursor = gdk_cursor_new (GDK_XTERM);
	text->default_cursor = gdk_cursor_new (GDK_LEFT_PTR);
}

/* Unrealize handler for the text item */
static void
e_text_unrealize (GnomeCanvasItem *item)
{
	EText *text;

	text = E_TEXT (item);

	gdk_gc_unref (text->gc);
	text->gc = NULL;

	gdk_cursor_destroy (text->i_cursor);
	gdk_cursor_destroy (text->default_cursor);

	if (parent_class->unrealize)
		(* parent_class->unrealize) (item);
}

/* Calculates the x position of the specified line of text, based on the text's justification */
static double
get_line_xpos_item_relative (EText *text, struct line *line)
{
	double x;

	x = text->x;

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_W:
	case GTK_ANCHOR_SW:
		break;

	case GTK_ANCHOR_N:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_S:
		x -= text->max_width / 2;
		break;

	case GTK_ANCHOR_NE:
	case GTK_ANCHOR_E:
	case GTK_ANCHOR_SE:
		x -= text->max_width;
		break;
	}

	switch (text->justification) {
	case GTK_JUSTIFY_RIGHT:
		x += text->max_width - line->width;
		break;

	case GTK_JUSTIFY_CENTER:
		x += (text->max_width - line->width) * 0.5;
		break;

	default:
		/* For GTK_JUSTIFY_LEFT, we don't have to do anything.  We do not support
		 * GTK_JUSTIFY_FILL, yet.
		 */
		break;
	}

	return x;
}

/* Calculates the y position of the first line of text. */
static double
get_line_ypos_item_relative (EText *text)
{
	double y;

	y = text->y;

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_N:
	case GTK_ANCHOR_NE:
		break;

	case GTK_ANCHOR_W:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_E:
		y -= text->height / 2;
		break;

	case GTK_ANCHOR_SW:
	case GTK_ANCHOR_S:
	case GTK_ANCHOR_SE:
		y -= text->height;
		break;
	}

	return y;
}

/* Calculates the x position of the specified line of text, based on the text's justification */
static int
get_line_xpos (EText *text, struct line *line)
{
	int x;

	x = text->cx;

	switch (text->justification) {
	case GTK_JUSTIFY_RIGHT:
		x += text->max_width - line->width;
		break;

	case GTK_JUSTIFY_CENTER:
		x += (text->max_width - line->width) / 2;
		break;

	default:
		/* For GTK_JUSTIFY_LEFT, we don't have to do anything.  We do not support
		 * GTK_JUSTIFY_FILL, yet.
		 */
		break;
	}

	return x;
}

static void
_get_tep(EText *text)
{
	if (!text->tep) {
		text->tep = e_text_event_processor_emacs_like_new();
		gtk_object_ref (GTK_OBJECT (text->tep));
		gtk_object_sink (GTK_OBJECT (text->tep));
		gtk_signal_connect(GTK_OBJECT(text->tep),
				   "command",
				   GTK_SIGNAL_FUNC(e_text_command),
				   (gpointer) text);
	}
}

/* Draw handler for the text item */
static void
e_text_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
			int x, int y, int width, int height)
{
	EText *text;
	GdkRectangle rect, *clip_rect;
	struct line *lines;
	int i;
	int xpos, ypos;
	int start_char, end_char;
	int sel_start, sel_end;
	GdkRectangle sel_rect;
	GdkGC *fg_gc;
	GnomeCanvas *canvas;

	text = E_TEXT (item);
	canvas = GNOME_CANVAS_ITEM(text)->canvas;

	fg_gc = GTK_WIDGET(canvas)->style->fg_gc[text->has_selection ? GTK_STATE_SELECTED : GTK_STATE_ACTIVE];

	if (!text->text || !text->font)
		return;

	clip_rect = NULL;
	if (text->clip) {
		rect.x = text->clip_cx - x;
		rect.y = text->clip_cy - y;
		rect.width = text->clip_cwidth;
		rect.height = text->clip_cheight;
		
		gdk_gc_set_clip_rectangle (text->gc, &rect);
		gdk_gc_set_clip_rectangle (fg_gc, &rect);
		clip_rect = &rect;
	}
	lines = text->lines;
	ypos = text->cy + text->font->ascent;

	if (text->stipple)
		gnome_canvas_set_stipple_origin (item->canvas, text->gc);

	for (i = 0; i < text->num_lines; i++) {
		xpos = get_line_xpos (text, lines);
		if (text->editing) {
			xpos -= text->xofs_edit;
			start_char = lines->text - text->text;
			end_char = start_char + lines->length;
			sel_start = text->selection_start;
			sel_end = text->selection_end;
			if (sel_start > sel_end ) {
				sel_start ^= sel_end;
				sel_end ^= sel_start;
				sel_start ^= sel_end;
			}
			if ( sel_start < start_char )
				sel_start = start_char;
			if ( sel_end > end_char )
				sel_end = end_char;
			if ( sel_start < sel_end ) {
				sel_rect.x = xpos - x + gdk_text_width (text->font,
									lines->text,
									sel_start - start_char);
				sel_rect.y = ypos - y - text->font->ascent;
				sel_rect.width = gdk_text_width (text->font,
								 lines->text + sel_start - start_char,
								 sel_end - sel_start);
				sel_rect.height = text->font->ascent + text->font->descent;
				gtk_paint_flat_box(GTK_WIDGET(item->canvas)->style,
						   drawable,
						   text->has_selection ?
						   GTK_STATE_SELECTED :
						   GTK_STATE_ACTIVE,
						   GTK_SHADOW_NONE,
						   clip_rect,
						   GTK_WIDGET(item->canvas),
						   "text",
						   sel_rect.x,
						   sel_rect.y,
						   sel_rect.width,
						   sel_rect.height);
				gdk_draw_text (drawable,
					       text->font,
					       text->gc,
					       xpos - x,
					       ypos - y,
					       lines->text,
					       sel_start - start_char);
				gdk_draw_text (drawable,
					       text->font,
					       fg_gc,
					       xpos - x + gdk_text_width (text->font,
									  lines->text,
									  sel_start - start_char),
					       ypos - y,
					       lines->text + sel_start - start_char,
					       sel_end - sel_start);
				gdk_draw_text (drawable,
					       text->font,
					       text->gc,
					       xpos - x + gdk_text_width (text->font,
									  lines->text,
									  sel_end - start_char),
					       ypos - y,
					       lines->text + sel_end - start_char,
					       end_char - sel_end);
			} else {
				gdk_draw_text (drawable,
					       text->font,
					       text->gc,
					       xpos - x,
					       ypos - y,
					       lines->text,
					       lines->length);
			}
			if (text->selection_start == text->selection_end &&
			    text->selection_start >= start_char &&
			    text->selection_start <= end_char &&
			    text->show_cursor) {
				gdk_draw_rectangle (drawable,
						    text->gc,
						    TRUE,
						    xpos - x + gdk_text_width (text->font, 
									       lines->text,
									       sel_start - start_char),
						    ypos - y - text->font->ascent,
						    1,
						    text->font->ascent + text->font->descent);
			}
		} else {
			if ( text->clip && text->use_ellipsis && lines->ellipsis_length < lines->length) {
				gdk_draw_text (drawable,
					       text->font,
					       text->gc,
					       xpos - x,
					       ypos - y,
					       lines->text,
					       lines->ellipsis_length);
				gdk_draw_text (drawable,
					       text->font,
					       text->gc,
					       xpos - x + 
					       lines->width - text->ellipsis_width,
					       ypos - y,
					       text->ellipsis ? text->ellipsis : "...",
					       text->ellipsis ? strlen (text->ellipsis) : 3);
			} else
					
				gdk_draw_text (drawable,
					       text->font,
					       text->gc,
					       xpos - x,
					       ypos - y,
					       lines->text,
					       lines->length);
		}

		ypos += text->font->ascent + text->font->descent;
		lines++;
	}

	if (text->clip) {
		gdk_gc_set_clip_rectangle (text->gc, NULL);
		gdk_gc_set_clip_rectangle (fg_gc, NULL);
	}
}

/* Render handler for the text item */
static void
e_text_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf)
{
	EText *text;
	guint32 fg_color;
	double xpos, ypos;
	struct line *lines;
	int i, j;
	double affine[6];
	ETextSuckFont *suckfont;
	int dx, dy;
	ArtPoint start_i, start_c;

	text = E_TEXT (item);

	if (!text->text || !text->font || !text->suckfont)
		return;

	suckfont = text->suckfont;

	fg_color = text->rgba;

        gnome_canvas_buf_ensure_buf (buf);

	lines = text->lines;
	start_i.y = get_line_ypos_item_relative (text);

	art_affine_scale (affine, item->canvas->pixels_per_unit, item->canvas->pixels_per_unit);
	for (i = 0; i < 6; i++)
		affine[i] = text->affine[i];

	for (i = 0; i < text->num_lines; i++) {
		if (lines->length != 0) {
			start_i.x = get_line_xpos_item_relative (text, lines);
			art_affine_point (&start_c, &start_i, text->affine);
			xpos = start_c.x;
			ypos = start_c.y;

			for (j = 0; j < lines->length; j++) {
				ETextSuckChar *ch;

				ch = &suckfont->chars[(unsigned char)((lines->text)[j])];

				affine[4] = xpos;
				affine[5] = ypos;
				art_rgb_bitmap_affine (
					buf->buf,
					buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1,
					buf->buf_rowstride,
					suckfont->bitmap + (ch->bitmap_offset >> 3),
					ch->width,
					suckfont->bitmap_height,
					suckfont->bitmap_width >> 3,
					fg_color,
					affine,
					ART_FILTER_NEAREST, NULL);

				dx = ch->left_sb + ch->width + ch->right_sb;
				xpos += dx * affine[0];
				ypos += dx * affine[1];
			}
		}

		dy = text->font->ascent + text->font->descent;
		start_i.y += dy;
		lines++;
	}

	buf->is_bg = 0;
}

/* Point handler for the text item */
static double
e_text_point (GnomeCanvasItem *item, double x, double y,
			 int cx, int cy, GnomeCanvasItem **actual_item)
{
	EText *text;
	int i;
	struct line *lines;
	int x1, y1, x2, y2;
	int font_height;
	int dx, dy;
	double dist, best;

	text = E_TEXT (item);

	*actual_item = item;

	/* The idea is to build bounding rectangles for each of the lines of
	 * text (clipped by the clipping rectangle, if it is activated) and see
	 * whether the point is inside any of these.  If it is, we are done.
	 * Otherwise, calculate the distance to the nearest rectangle.
	 */

	if (text->font)
		font_height = text->font->ascent + text->font->descent;
	else
		font_height = 0;

	best = 1.0e36;

	lines = text->lines;

	for (i = 0; i < text->num_lines; i++) {
		/* Compute the coordinates of rectangle for the current line,
		 * clipping if appropriate.
		 */

		x1 = get_line_xpos (text, lines);
		y1 = text->cy + i * font_height;
		x2 = x1 + lines->width;
		y2 = y1 + font_height;

		if (text->clip) {
			if (x1 < text->clip_cx)
				x1 = text->clip_cx;

			if (y1 < text->clip_cy)
				y1 = text->clip_cy;

			if (x2 > (text->clip_cx + text->clip_width))
				x2 = text->clip_cx + text->clip_width;

			if (y2 > (text->clip_cy + text->clip_height))
				y2 = text->clip_cy + text->clip_height;

			if ((x1 >= x2) || (y1 >= y2))
				continue;
		}

		/* Calculate distance from point to rectangle */

		if (cx < x1)
			dx = x1 - cx;
		else if (cx >= x2)
			dx = cx - x2 + 1;
		else
			dx = 0;

		if (cy < y1)
			dy = y1 - cy;
		else if (cy >= y2)
			dy = cy - y2 + 1;
		else
			dy = 0;

		if ((dx == 0) && (dy == 0))
			return 0.0;

		dist = sqrt (dx * dx + dy * dy);
		if (dist < best)
			best = dist;

		/* Next! */

		lines++;
	}

	return best / item->canvas->pixels_per_unit;
}

/* Bounds handler for the text item */
static void
e_text_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
{
	EText *text;
	double width, height;

	text = E_TEXT (item);

	*x1 = text->x;
	*y1 = text->y;

	if (text->clip) {
		width = text->clip_width;
		height = text->clip_height;
	} else {
		width = text->max_width / item->canvas->pixels_per_unit;
		height = text->height / item->canvas->pixels_per_unit;
	}

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_W:
	case GTK_ANCHOR_SW:
		break;

	case GTK_ANCHOR_N:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_S:
		*x1 -= width / 2.0;
		break;

	case GTK_ANCHOR_NE:
	case GTK_ANCHOR_E:
	case GTK_ANCHOR_SE:
		*x1 -= width;
		break;
	}

	switch (text->anchor) {
	case GTK_ANCHOR_NW:
	case GTK_ANCHOR_N:
	case GTK_ANCHOR_NE:
		break;

	case GTK_ANCHOR_W:
	case GTK_ANCHOR_CENTER:
	case GTK_ANCHOR_E:
		*y1 -= height / 2.0;
		break;

	case GTK_ANCHOR_SW:
	case GTK_ANCHOR_S:
	case GTK_ANCHOR_SE:
		*y1 -= height;
		break;
	}

	*x2 = *x1 + width;
	*y2 = *y1 + height;
}

static void
_get_xy_from_position (EText *text, gint position, gint *xp, gint *yp)
{
	if (xp || yp) {
		struct line *lines;
		int x, y;
		int j;
		x = get_line_xpos (text, lines);
		y = text->cy;
		for (j = 0, lines = text->lines; j < text->num_lines; lines++, j++) {
			if (lines->text > text->text + position)
				break;
			y += text->font->ascent + text->font->descent;
		}
		lines --;
		y -= text->font->descent;
		
		x += gdk_text_width (text->font,
				     lines->text,
				     position - (lines->text - text->text));
		x -= text->xofs_edit;
		if (xp)
			*xp = x;
		if (yp)
			*yp = y;
	}
}

static gint
_get_position_from_xy (EText *text, gint x, gint y)
{
	int i, j;
	int ypos = text->cy;
	int xpos;
	struct line *lines;
	j = 0;
	while (y > ypos) {
		ypos += text->font->ascent + text->font->descent;
		j ++;
	}
	j--;
	if (j >= text->num_lines)
		j = text->num_lines - 1;
	if (j < 0)
		j = 0;
	i = 0;
	lines = text->lines;
	lines += j;
	x += text->xofs_edit;
	xpos = get_line_xpos (text, lines);
	for(i = 0; i < lines->length; i++) {
		int charwidth = gdk_text_width(text->font,
					       lines->text + i,
					       1);
		xpos += charwidth / 2;
		if (xpos > x) {
			break;
		}
		xpos += (charwidth + 1) / 2;
	}
	return lines->text + i - text->text;
}

#define SCROLL_WAIT_TIME 30000

static gboolean
_blink_scroll_timeout (gpointer data)
{
	EText *text = E_TEXT(data);
	gulong current_time;
	gboolean scroll = FALSE;
	gboolean redraw = FALSE;
	
	g_timer_elapsed(text->timer, &current_time);

	if (text->scroll_start + SCROLL_WAIT_TIME > 1000000) {
		if (current_time > text->scroll_start - (1000000 - SCROLL_WAIT_TIME) &&
		    current_time < text->scroll_start)
			scroll = TRUE;
	} else {
		if (current_time > text->scroll_start + SCROLL_WAIT_TIME ||
		    current_time < text->scroll_start)
			scroll = TRUE;
	}
	if (scroll && text->button_down) {
		if (text->lastx - text->clip_cx > text->clip_cwidth &&
		    text->xofs_edit < text->max_width - text->clip_cwidth) {
			text->xofs_edit += 4;
			if (text->xofs_edit > text->max_width - text->clip_cwidth + 1)
				text->xofs_edit = text->max_width - text->clip_cwidth + 1;
			redraw = TRUE;
		}
		if (text->lastx - text->clip_cx < 0 &&
		    text->xofs_edit > 0) {
			text->xofs_edit -= 4;
			if (text->xofs_edit < 0)
				text->xofs_edit = 0;
			redraw = TRUE;
		}
		if (redraw) {
			ETextEventProcessorEvent e_tep_event;
			e_tep_event.type = GDK_MOTION_NOTIFY;
			e_tep_event.motion.state = text->last_state;
			e_tep_event.motion.time = 0;
			e_tep_event.motion.position = _get_position_from_xy(text, text->lastx, text->lasty);
			_get_tep(text);
			e_text_event_processor_handle_event (text->tep,
							     &e_tep_event);
			text->scroll_start = current_time;
		}
	}

	if (!((current_time / 500000) % 2)) {
		if (!text->show_cursor)
			redraw = TRUE;
		text->show_cursor = TRUE;
	} else {
		if (text->show_cursor)
			redraw = TRUE;
		text->show_cursor = FALSE;
	}
	if (redraw)
		gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(text));
	return TRUE;
}

static gint
e_text_event (GnomeCanvasItem *item, GdkEvent *event)
{
	EText *text = E_TEXT(item);
	ETextEventProcessorEvent e_tep_event;

	gint return_val = 0;

	e_tep_event.type = event->type;
	switch (event->type) {
	case GDK_FOCUS_CHANGE:
		if (text->editable) {
			GdkEventFocus *focus_event;
			focus_event = (GdkEventFocus *) event;
			if (focus_event->in) {
				if(!text->editing) {
					text->editing = TRUE;
					if ( text->pointer_in ) {
						if ( text->default_cursor_shown ) {
							gdk_window_set_cursor(GTK_WIDGET(item->canvas)->window, text->i_cursor);
							text->default_cursor_shown = FALSE;
						}
					}
					text->selection_start = 0;
					text->selection_end = 0;
					text->select_by_word = FALSE;
					text->xofs_edit = 0;
					if (text->timeout_id == 0)
						text->timeout_id = g_timeout_add(10, _blink_scroll_timeout, text);
					text->timer = g_timer_new();
					g_timer_elapsed(text->timer, &(text->scroll_start));
					g_timer_start(text->timer);
				}
			} else {
				text->editing = FALSE;
				if ( ! text->default_cursor_shown ) {
					gdk_window_set_cursor(GTK_WIDGET(item->canvas)->window, text->default_cursor);
					text->default_cursor_shown = TRUE;
				}
				if (text->timeout_id) {
					g_source_remove(text->timeout_id);
					text->timeout_id = 0;
				}
				if (text->timer) {
					g_timer_stop(text->timer);
					g_timer_destroy(text->timer);
					text->timer = NULL;
				}
			}
			if ( text->line_wrap )
				split_into_lines (text);
			else
				calc_line_widths (text);
			recalc_bounds (text);
		}
		return_val = 0;
		break;
	case GDK_KEY_PRESS: /* Fall Through */
	case GDK_KEY_RELEASE:
		if (text->editing) {
			GdkEventKey key = event->key;
			e_tep_event.key.time = key.time;
			e_tep_event.key.state = key.state;
			e_tep_event.key.keyval = key.keyval;
			e_tep_event.key.length = key.length;
			e_tep_event.key.string = key.string;
			_get_tep(text);
			return e_text_event_processor_handle_event (text->tep,
								    &e_tep_event);
		}
		else
			return 0;
		break;
	case GDK_BUTTON_PRESS: /* Fall Through */
	case GDK_BUTTON_RELEASE:
		if (text->editing) {
			GdkEventButton button = event->button;
			e_tep_event.button.time = button.time;
			e_tep_event.button.state = button.state;
			e_tep_event.button.button = button.button;
			e_tep_event.button.position = _get_position_from_xy(text, button.x, button.y);
			_get_tep(text);
			return_val = e_text_event_processor_handle_event (text->tep,
									  &e_tep_event);
			if (event->button.button == 1) {
				if (event->type == GDK_BUTTON_PRESS)
					text->button_down = TRUE;
				else
					text->button_down = FALSE;
			}
			text->lastx = button.x;
			text->lasty = button.y;
			text->last_state = button.state;
		} else if (text->editable && event->type == GDK_BUTTON_RELEASE && event->button.button == 1) {
			gnome_canvas_item_grab_focus (item);
			return 1;
		}
		break;
	case GDK_MOTION_NOTIFY:
		if (text->editing) {
			GdkEventMotion motion = event->motion;
			e_tep_event.motion.time = motion.time;
			e_tep_event.motion.state = motion.state;
			e_tep_event.motion.position = _get_position_from_xy(text, motion.x, motion.y);
			_get_tep(text);
			return_val = e_text_event_processor_handle_event (text->tep,
								       &e_tep_event);
			text->lastx = motion.x;
			text->lasty = motion.y;
			text->last_state = motion.state;
		}
		break;
	case GDK_ENTER_NOTIFY:
		text->pointer_in = TRUE;
		if (text->editing) {
			if ( text->default_cursor_shown ) {
				gdk_window_set_cursor(GTK_WIDGET(item->canvas)->window, text->i_cursor);
				text->default_cursor_shown = FALSE;
			}
		}
		break;
	case GDK_LEAVE_NOTIFY:
		text->pointer_in = FALSE;
		if (text->editing) {
			if ( ! text->default_cursor_shown ) {
				gdk_window_set_cursor(GTK_WIDGET(item->canvas)->window, text->default_cursor);
				text->default_cursor_shown = TRUE;
			}
		}
		break;
	default:
		break;
	}
	if (return_val)
		return return_val;
	if (GNOME_CANVAS_ITEM_CLASS(parent_class)->event)
		return GNOME_CANVAS_ITEM_CLASS(parent_class)->event(item, event);
	else
		return 0;
}

static int
_get_position(EText *text, ETextEventProcessorCommand *command)
{
	int i;
	int length;
	int x, y;
	
	switch (command->position) {
		
	case E_TEP_VALUE:
		return command->value;

	case E_TEP_SELECTION:
		return text->selection_end;

	case E_TEP_START_OF_BUFFER:
		return 0;
	case E_TEP_END_OF_BUFFER:
		return strlen(text->text);

	case E_TEP_START_OF_LINE:
		for (i = text->selection_end - 2; i > 0; i--)
			if (text->text[i] == '\n') {
				i++;
				break;
			}
		return i;
	case E_TEP_END_OF_LINE:
		length = strlen(text->text);
		for (i = text->selection_end + 1; i < length; i++)
			if (text->text[i] == '\n') {
				break;
			}
		if (i > length)
			i = length;
		return i;

	case E_TEP_FORWARD_CHARACTER:
		length = strlen(text->text);
		i = text->selection_end + 1;
		if (i > length)
			i = length;
		return i;
	case E_TEP_BACKWARD_CHARACTER:
		i = text->selection_end - 1;
		if (i < 0)
			i = 0;
		return i;

	case E_TEP_FORWARD_WORD:
		length = strlen(text->text);
		for (i = text->selection_end + 1; i < length; i++)
			if (isspace(text->text[i])) {
				break;
			}
		if (i > length)
			i = length;
		return i;
	case E_TEP_BACKWARD_WORD:
		for (i = text->selection_end - 2; i > 0; i--)
			if (isspace(text->text[i])) {
				i++;
				break;
			}
		if (i < 0)
			i = 0;
		return i;

	case E_TEP_FORWARD_LINE:
		_get_xy_from_position(text, text->selection_end, &x, &y);
		y += text->font->ascent + text->font->descent;
		return _get_position_from_xy(text, x, y);
	case E_TEP_BACKWARD_LINE:
		_get_xy_from_position(text, text->selection_end, &x, &y);
		y -= text->font->ascent + text->font->descent;
		return _get_position_from_xy(text, x, y);

	case E_TEP_FORWARD_PARAGRAPH:
	case E_TEP_BACKWARD_PARAGRAPH:
		
	case E_TEP_FORWARD_PAGE:
	case E_TEP_BACKWARD_PAGE:
		return text->selection_end;
	default:
		return text->selection_end;
		}
}

static void
_delete_selection(EText *text)
{
	gint length = strlen(text->text);
	if (text->selection_end == text->selection_start)
		return;
	if (text->selection_end < text->selection_start) {
		text->selection_end ^= text->selection_start;
		text->selection_start ^= text->selection_end;
		text->selection_end ^= text->selection_start;
	}
	memmove( text->text + text->selection_start,
		 text->text + text->selection_end,
		 length - text->selection_end + 1 );
	length -= text->selection_end - text->selection_start;
	text->selection_end = text->selection_start;
}

static void
_insert(EText *text, char *string, int value)
{
	if (value > 0) {
		char *temp;
		gint length = strlen(text->text);
		temp = g_new(gchar, length + value + 1);
		strncpy(temp, text->text, text->selection_start);
		strncpy(temp + text->selection_start, string, value);
		strcpy(temp + text->selection_start + value, text->text + text->selection_start);
		g_free(text->text);
		text->text = temp;
		text->selection_start += value;
		text->selection_end = text->selection_start;
	}
}

static void
e_text_command(ETextEventProcessor *tep, ETextEventProcessorCommand *command, gpointer data)
{
	EText *text = E_TEXT(data);
	int sel_start, sel_end;
	switch (command->action) {
	case E_TEP_MOVE:
		text->selection_start = _get_position(text, command);
		text->selection_end = text->selection_start;
		if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;
	case E_TEP_SELECT:
		text->selection_end = _get_position(text, command);
		sel_start = MIN(text->selection_start, text->selection_end);
		sel_end = MAX(text->selection_start, text->selection_end);
		if (sel_start != sel_end) {
			e_text_supply_selection (text, command->time, GDK_SELECTION_PRIMARY, text->text + sel_start, sel_end - sel_start);
		} else if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;
	case E_TEP_DELETE:
		if (text->selection_end == text->selection_start) {
			text->selection_end = _get_position(text, command);
		}
		_delete_selection(text);
		split_into_lines (text);
		recalc_bounds (text);
		if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;

	case E_TEP_INSERT:
		if (text->selection_end != text->selection_start) {
			_delete_selection(text);
		}
		_insert(text, command->string, command->value);
		split_into_lines (text);
		recalc_bounds (text);
		if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;
	case E_TEP_COPY:
		sel_start = MIN(text->selection_start, text->selection_end);
		sel_end = MAX(text->selection_start, text->selection_end);
		if (sel_start != sel_end) {
			e_text_supply_selection (text, command->time, clipboard_atom, text->text + sel_start, sel_end - sel_start);
		}
		if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;
	case E_TEP_PASTE:
		e_text_get_selection (text, clipboard_atom, command->time);
		if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;
	case E_TEP_GET_SELECTION:
		e_text_get_selection (text, GDK_SELECTION_PRIMARY, command->time);
		break;
	case E_TEP_ACTIVATE:
		if (text->timer) {
			g_timer_reset(text->timer);
		}
		break;
	case E_TEP_SET_SELECT_BY_WORD:
		text->select_by_word = command->value;
		break;
	case E_TEP_GRAB:
		gnome_canvas_item_grab (GNOME_CANVAS_ITEM(text), 
					GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK,
					text->i_cursor,
					command->time);
		break;
	case E_TEP_UNGRAB:
		gnome_canvas_item_ungrab (GNOME_CANVAS_ITEM(text), command->time);
		break;
	case E_TEP_NOP:
		break;
	}

	if (!text->button_down) {
		int x;
		int i;
		struct line *lines = text->lines;
		for (lines = text->lines, i = 0; i < text->num_lines ; i++, lines ++) {
			if (lines->text - text->text > text->selection_end) {
				break;
			}
		}
		lines --;
		x = gdk_text_width(text->font,
				   lines->text, 
				   text->selection_end - (lines->text - text->text));
		

		if (x < text->xofs_edit) {
			text->xofs_edit = x;
		}

		if (2 + x - text->clip_width > text->xofs_edit) {
			text->xofs_edit = 2 + x - text->clip_width;
		}
	}

	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(text));
}

static void _invisible_destroy (GtkInvisible *invisible,
				EText *text)
{
	text->invisible = NULL;
}

static GtkWidget *e_text_get_invisible(EText *text)
{	
	GtkWidget *invisible;
	if (text->invisible) {
		invisible = text->invisible;
	} else {
		invisible = gtk_invisible_new();
		text->invisible = invisible;
		
		gtk_selection_add_target (invisible,
					  GDK_SELECTION_PRIMARY,
					  GDK_SELECTION_TYPE_STRING,
					  E_SELECTION_PRIMARY);
		gtk_selection_add_target (invisible,
					  clipboard_atom,
					  GDK_SELECTION_TYPE_STRING,
					  E_SELECTION_CLIPBOARD);
		
		gtk_signal_connect (GTK_OBJECT(invisible), "selection_get",
				    GTK_SIGNAL_FUNC (_selection_get), 
				    text);
		gtk_signal_connect (GTK_OBJECT(invisible), "selection_clear_event",
				    GTK_SIGNAL_FUNC (_selection_clear_event),
				    text);
		gtk_signal_connect (GTK_OBJECT(invisible), "selection_received",
				    GTK_SIGNAL_FUNC (_selection_received),
				    text);
		
		gtk_signal_connect (GTK_OBJECT(invisible), "destroy",
				    GTK_SIGNAL_FUNC (_invisible_destroy),
				    text);
	}
	return invisible;
}

static void
_selection_clear_event (GtkInvisible *invisible,
			GdkEventSelection *event,
			EText *text)
{
	if (event->selection == GDK_SELECTION_PRIMARY) {
		g_free (text->primary_selection);
		text->primary_selection = NULL;
		text->primary_length = 0;

		text->has_selection = FALSE;
		gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(text));

	} else if (event->selection == clipboard_atom) {
		g_free (text->clipboard_selection);
		text->clipboard_selection = NULL;
		text->clipboard_length = 0;
	}
}

static void
_selection_get (GtkInvisible *invisible,
		GtkSelectionData *selection_data,
		guint info,
		guint time_stamp,
		EText *text)
{
	switch (info) {
	case E_SELECTION_PRIMARY:
		gtk_selection_data_set (selection_data, GDK_SELECTION_TYPE_STRING,
					8, text->primary_selection, text->primary_length);
		break;
	case E_SELECTION_CLIPBOARD:
		gtk_selection_data_set (selection_data, GDK_SELECTION_TYPE_STRING,
					8, text->clipboard_selection, text->clipboard_length);
		break;
	}
}

static void
_selection_received (GtkInvisible *invisible,
		     GtkSelectionData *selection_data,
		     guint time,
		     EText *text)
{
	if (selection_data->length < 0 || selection_data->type != GDK_SELECTION_TYPE_STRING) {
		return;
	} else {
		ETextEventProcessorCommand command;
		command.action = E_TEP_INSERT;
		command.position = E_TEP_SELECTION;
		command.string = selection_data->data;
		command.value = selection_data->length;
		command.time = time;
		e_text_command(text->tep, &command, text);
	}
}

static void e_text_supply_selection (EText *text, guint time, GdkAtom selection, guchar *data, gint length)
{
	gboolean successful;
	GtkWidget *invisible;

	invisible = e_text_get_invisible(text);

	if (selection == GDK_SELECTION_PRIMARY ) {
		if (text->primary_selection) {
			g_free (text->primary_selection);
		}
		text->primary_selection = g_strndup(data, length);
		text->primary_length = length;
	} else if (selection == clipboard_atom) {
		if (text->clipboard_selection) {
			g_free (text->clipboard_selection);
		}
		text->clipboard_selection = g_strndup(data, length);
		text->clipboard_length = length;
	}

	successful = gtk_selection_owner_set (invisible,
					      selection,
					      time);
	
	if (selection == GDK_SELECTION_PRIMARY)
		text->has_selection = successful;
}

static void
e_text_get_selection(EText *text, GdkAtom selection, guint32 time)
{
	GtkWidget *invisible;
	invisible = e_text_get_invisible(text);
	gtk_selection_convert(invisible,
			      selection,
			      GDK_SELECTION_TYPE_STRING,
			      time);
}

#if 0
static void
e_text_real_copy_clipboard (EText *text)
{
  guint32 time;
  gint selection_start_pos; 
  gint selection_end_pos;

  g_return_if_fail (text != NULL);
  g_return_if_fail (E_IS_TEXT (text));
  
  time = gtk_text_get_event_time (text);
  selection_start_pos = MIN (text->selection_start, text->selection_end);
  selection_end_pos = MAX (text->selection_start, text->selection_end);
 
  if (selection_start_pos != selection_end_pos)
    {
      if (gtk_selection_owner_set (GTK_WIDGET (text->canvas),
				   clipboard_atom,
				   time))
	      text->clipboard_text = "";
    }
}

static void
e_text_real_paste_clipboard (EText *text)
{
  guint32 time;

  g_return_if_fail (text != NULL);
  g_return_if_fail (E_IS_TEXT (text));
  
  time = e_text_get_event_time (text);
  if (text->editable)
	  gtk_selection_convert (GTK_WIDGET(text->widget),
				 clipboard_atom,
				 gdk_atom_intern ("COMPOUND_TEXT", FALSE), time);
}
#endif

/* Get the timestamp of the current event. Actually, the only thing
 * we really care about below is the key event
 */
static guint32
e_text_get_event_time (EText *text)
{
  GdkEvent *event;
  guint32 tm = GDK_CURRENT_TIME;
  
  event = gtk_get_current_event();
  
  if (event)
    switch (event->type)
      {
      case GDK_MOTION_NOTIFY:
	tm = event->motion.time; break;
      case GDK_BUTTON_PRESS:
      case GDK_2BUTTON_PRESS:
      case GDK_3BUTTON_PRESS:
      case GDK_BUTTON_RELEASE:
	tm = event->button.time; break;
      case GDK_KEY_PRESS:
      case GDK_KEY_RELEASE:
	tm = event->key.time; break;
      case GDK_ENTER_NOTIFY:
      case GDK_LEAVE_NOTIFY:
	tm = event->crossing.time; break;
      case GDK_PROPERTY_NOTIFY:
	tm = event->property.time; break;
      case GDK_SELECTION_CLEAR:
      case GDK_SELECTION_REQUEST:
      case GDK_SELECTION_NOTIFY:
	tm = event->selection.time; break;
      case GDK_PROXIMITY_IN:
      case GDK_PROXIMITY_OUT:
	tm = event->proximity.time; break;
      default:			/* use current time */
	break;
      }
  gdk_event_free(event);
  
  return tm;
}



/* Routines for sucking fonts from the X server */

static ETextSuckFont *
e_suck_font (GdkFont *font)
{
	ETextSuckFont *suckfont;
	int i;
	int x, y;
	char text[1];
	int lbearing, rbearing, ch_width, ascent, descent;
	GdkPixmap *pixmap;
	GdkColor black, white;
	GdkImage *image;
	GdkGC *gc;
	guchar *line;
	int width, height;
	int black_pixel, pixel;

	if (!font)
		return NULL;

	suckfont = g_new (ETextSuckFont, 1);

	height = font->ascent + font->descent;
	x = 0;
	for (i = 0; i < 256; i++) {
		text[0] = i;
		gdk_text_extents (font, text, 1,
				  &lbearing, &rbearing, &ch_width, &ascent, &descent);
		suckfont->chars[i].left_sb = lbearing;
		suckfont->chars[i].right_sb = ch_width - rbearing;
		suckfont->chars[i].width = rbearing - lbearing;
		suckfont->chars[i].ascent = ascent;
		suckfont->chars[i].descent = descent;
		suckfont->chars[i].bitmap_offset = x;
		x += (ch_width + 31) & -32;
	}

	width = x;

	suckfont->bitmap_width = width;
	suckfont->bitmap_height = height;
	suckfont->ascent = font->ascent;

	pixmap = gdk_pixmap_new (NULL, suckfont->bitmap_width,
				 suckfont->bitmap_height, 1);
	gc = gdk_gc_new (pixmap);
	gdk_gc_set_font (gc, font);

	black_pixel = BlackPixel (gdk_display, DefaultScreen (gdk_display));
	black.pixel = black_pixel;
	white.pixel = WhitePixel (gdk_display, DefaultScreen (gdk_display));
	gdk_gc_set_foreground (gc, &white);
	gdk_draw_rectangle (pixmap, gc, 1, 0, 0, width, height);

	gdk_gc_set_foreground (gc, &black);
	for (i = 0; i < 256; i++) {
		text[0] = i;
		gdk_draw_text (pixmap, font, gc,
			       suckfont->chars[i].bitmap_offset - suckfont->chars[i].left_sb,
			       font->ascent,
			       text, 1);
	}

	/* The handling of the image leaves me with distinct unease.  But this
	 * is more or less copied out of gimp/app/text_tool.c, so it _ought_ to
	 * work. -RLL
	 */

	image = gdk_image_get (pixmap, 0, 0, width, height);
	suckfont->bitmap = g_malloc0 ((width >> 3) * height);

	line = suckfont->bitmap;
	for (y = 0; y < height; y++) {
		for (x = 0; x < width; x++) {
			pixel = gdk_image_get_pixel (image, x, y);
			if (pixel == black_pixel)
				line[x >> 3] |= 128 >> (x & 7);
		}
		line += width >> 3;
	}

	gdk_image_destroy (image);

	/* free the pixmap */
	gdk_pixmap_unref (pixmap);

	/* free the gc */
	gdk_gc_destroy (gc);

	return suckfont;
}

static void
e_suck_font_free (ETextSuckFont *suckfont)
{
	g_free (suckfont->bitmap);
	g_free (suckfont);
}