/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-text.c - Text item for evolution.
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * Authors:
 *   Chris Lahey <clahey@ximian.com>
 *   Jon Trowbridge <trow@ximian.com>
 *
 * 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>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * published by the Free Software Foundation; either the
 *
 * This program 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "e-text.h"

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

#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

#include <libedataserver/libedataserver.h>

#include "e-canvas-utils.h"
#include "e-canvas.h"
#include "e-marshal.h"
#include "e-text-event-processor-emacs-like.h"
#include "e-unicode.h"
#include "e-misc-utils.h"
#include "gal-a11y-e-text.h"

G_DEFINE_TYPE (EText, e_text, GNOME_TYPE_CANVAS_ITEM)

enum {
	E_TEXT_CHANGED,
	E_TEXT_ACTIVATE,
	E_TEXT_KEYPRESS,
	E_TEXT_POPULATE_POPUP,
	E_TEXT_LAST_SIGNAL
};

static GQuark e_text_signals[E_TEXT_LAST_SIGNAL] = { 0 };

/* Object argument IDs */
enum {
	PROP_0,
	PROP_MODEL,
	PROP_EVENT_PROCESSOR,
	PROP_TEXT,
	PROP_BOLD,
	PROP_STRIKEOUT,
	PROP_ITALIC,
	PROP_ANCHOR,
	PROP_JUSTIFICATION,
	PROP_CLIP_WIDTH,
	PROP_CLIP_HEIGHT,
	PROP_CLIP,
	PROP_FILL_CLIP_RECTANGLE,
	PROP_X_OFFSET,
	PROP_Y_OFFSET,
	PROP_FILL_COLOR,
	PROP_FILL_COLOR_GDK,
	PROP_FILL_COLOR_RGBA,
	PROP_TEXT_WIDTH,
	PROP_TEXT_HEIGHT,
	PROP_EDITABLE,
	PROP_USE_ELLIPSIS,
	PROP_ELLIPSIS,
	PROP_LINE_WRAP,
	PROP_BREAK_CHARACTERS,
	PROP_MAX_LINES,
	PROP_WIDTH,
	PROP_HEIGHT,
	PROP_ALLOW_NEWLINES,
	PROP_CURSOR_POS,
	PROP_IM_CONTEXT,
	PROP_HANDLE_POPUP
};

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

static void	e_text_text_model_changed	(ETextModel *model,
						 EText *text);
static void	e_text_text_model_reposition	(ETextModel *model,
						 ETextModelReposFn fn,
						 gpointer repos_data,
						 gpointer data);

static void _get_tep (EText *text);

static void calc_height (EText *text);

static gboolean show_pango_rectangle (EText *text, PangoRectangle rect);

static void	e_text_do_popup			(EText *text,
						 GdkEvent *event_button,
						 gint position);

static void e_text_update_primary_selection (EText *text);
static void e_text_paste (EText *text, GdkAtom selection);
static void e_text_insert (EText *text, const gchar *string);
static void e_text_reset_im_context (EText *text);

static void reset_layout_attrs (EText *text);

/* IM Context Callbacks */
static void     e_text_commit_cb               (GtkIMContext *context,
						const gchar  *str,
						EText        *text);
static void     e_text_preedit_changed_cb      (GtkIMContext *context,
						EText        *text);
static gboolean e_text_retrieve_surrounding_cb (GtkIMContext *context,
						EText        *text);
static gboolean e_text_delete_surrounding_cb   (GtkIMContext *context,
						gint          offset,
						gint          n_chars,
						EText        *text);

static GdkAtom clipboard_atom = GDK_NONE;

static void
disconnect_im_context (EText *text)
{
	if (!text || !text->im_context)
		return;

	g_signal_handlers_disconnect_matched (
		text->im_context, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, text);
	text->im_context_signals_registered = FALSE;
}

/* Dispose handler for the text item */
static void
e_text_dispose (GObject *object)
{
	EText *text;

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

	text = E_TEXT (object);

	if (text->model_changed_signal_id)
		g_signal_handler_disconnect (
			text->model,
			text->model_changed_signal_id);
	text->model_changed_signal_id = 0;

	if (text->model_repos_signal_id)
		g_signal_handler_disconnect (
			text->model,
			text->model_repos_signal_id);
	text->model_repos_signal_id = 0;

	if (text->model)
		g_object_unref (text->model);
	text->model = NULL;

	if (text->tep_command_id)
		g_signal_handler_disconnect (
			text->tep,
			text->tep_command_id);
	text->tep_command_id = 0;

	if (text->tep)
		g_object_unref (text->tep);
	text->tep = NULL;

	g_free (text->revert);
	text->revert = NULL;

	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->dbl_timeout) {
		g_source_remove (text->dbl_timeout);
		text->dbl_timeout = 0;
	}

	if (text->tpl_timeout) {
		g_source_remove (text->tpl_timeout);
		text->tpl_timeout = 0;
	}

	if (text->layout) {
		g_object_unref (text->layout);
		text->layout = NULL;
	}

	if (text->im_context) {
		disconnect_im_context (text);
		g_object_unref (text->im_context);
		text->im_context = NULL;
	}

	if (text->font_desc) {
		pango_font_description_free (text->font_desc);
		text->font_desc = NULL;
	}

	/* Chain up to parent's dispose() method. */
	G_OBJECT_CLASS (e_text_parent_class)->dispose (object);
}

static void
insert_preedit_text (EText *text)
{
	PangoAttrList *attrs = NULL;
	PangoAttrList *preedit_attrs = NULL;
	gchar *preedit_string = NULL;
	GString *tmp_string = g_string_new (NULL);
	gint length = 0, cpos = 0;
	gboolean new_attrs = FALSE;

	if (text->layout == NULL || !GTK_IS_IM_CONTEXT (text->im_context))
		return;

	text->text = e_text_model_get_text (text->model);
	length = strlen (text->text);

	g_string_prepend_len (tmp_string, text->text,length);

	/* we came into this function only when text->preedit_len was not 0
	 * so we can safely fetch the preedit string */
	gtk_im_context_get_preedit_string (
		text->im_context, &preedit_string, &preedit_attrs, NULL);

	if (preedit_string && g_utf8_validate (preedit_string, -1, NULL)) {

		text->preedit_len = strlen (preedit_string);

		cpos = g_utf8_offset_to_pointer (
			text->text, text->selection_start) - text->text;

		g_string_insert (tmp_string, cpos, preedit_string);

		reset_layout_attrs (text);

		attrs = pango_layout_get_attributes (text->layout);
		if (!attrs) {
			attrs = pango_attr_list_new ();
			new_attrs = TRUE;
		}

		pango_layout_set_text (text->layout, tmp_string->str, tmp_string->len);

		pango_attr_list_splice (attrs, preedit_attrs, cpos, text->preedit_len);

		if (new_attrs) {
			pango_layout_set_attributes (text->layout, attrs);
			pango_attr_list_unref (attrs);
		}
	} else
		text->preedit_len = 0;

	if (preedit_string)
		g_free (preedit_string);
	if (preedit_attrs)
		pango_attr_list_unref (preedit_attrs);
	if (tmp_string)
		g_string_free (tmp_string, TRUE);
}

static void
reset_layout_attrs (EText *text)
{
	PangoAttrList *attrs = NULL;
	gint object_count;

	if (text->layout == NULL)
		return;

	object_count = e_text_model_object_count (text->model);

	if (text->bold || text->strikeout || text->italic || object_count > 0) {
		gint length = 0;
		gint i;

		attrs = pango_attr_list_new ();

		for (i = 0; i < object_count; i++) {
			gint start_pos, end_pos;
			PangoAttribute *attr;

			attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);

			e_text_model_get_nth_object_bounds (
				text->model, i, &start_pos, &end_pos);

			attr->start_index = g_utf8_offset_to_pointer (
				text->text, start_pos) - text->text;
			attr->end_index = g_utf8_offset_to_pointer (
				text->text, end_pos) - text->text;

			pango_attr_list_insert (attrs, attr);
		}

		if (text->bold || text->strikeout || text->italic)
			length = strlen (text->text);

		if (text->bold) {
			PangoAttribute *attr = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
			attr->start_index = 0;
			attr->end_index = length;

			pango_attr_list_insert_before (attrs, attr);
		}

		if (text->strikeout) {
			PangoAttribute *attr = pango_attr_strikethrough_new (TRUE);
			attr->start_index = 0;
			attr->end_index = length;

			pango_attr_list_insert_before (attrs, attr);
		}

		if (text->italic) {
			PangoAttribute *attr = pango_attr_style_new (PANGO_STYLE_ITALIC);
			attr->start_index = 0;
			attr->end_index = length;

			pango_attr_list_insert_before (attrs, attr);
		}
	}

	pango_layout_set_attributes (text->layout, attrs);

	if (attrs)
		pango_attr_list_unref (attrs);

	calc_height (text);
}

static void
create_layout (EText *text)
{
	GnomeCanvasItem *item = GNOME_CANVAS_ITEM (text);

	if (text->layout)
		return;

	text->layout = gtk_widget_create_pango_layout (
		GTK_WIDGET (item->canvas), text->text);
	if (text->line_wrap)
		pango_layout_set_width (
			text->layout, text->clip_width < 0
			? -1 : text->clip_width * PANGO_SCALE);
	reset_layout_attrs (text);
}

static void
reset_layout (EText *text)
{
	GnomeCanvasItem *item = GNOME_CANVAS_ITEM (text);

	if (text->layout == NULL) {
		create_layout (text);
	} else {
		PangoContext *pango_context;
		PangoFontDescription *font_desc;

		pango_context = gtk_widget_create_pango_context (GTK_WIDGET (item->canvas));
		font_desc = pango_context_get_font_description (pango_context);

		if (text->font_desc) {
			pango_font_description_free (text->font_desc);
		}
		text->font_desc = pango_font_description_new ();
		if (!pango_font_description_get_size_is_absolute (font_desc))
			pango_font_description_set_size (
				text->font_desc,
				pango_font_description_get_size (font_desc));
		else
			pango_font_description_set_absolute_size (
				text->font_desc,
				pango_font_description_get_size (font_desc));
		pango_font_description_set_family (
			text->font_desc,
			pango_font_description_get_family (font_desc));
		pango_layout_set_font_description (text->layout, text->font_desc);

		pango_layout_set_text (text->layout, text->text, -1);
		reset_layout_attrs (text);

		g_object_unref (pango_context);
	}

	if (!text->button_down) {
		PangoRectangle strong_pos, weak_pos;
		gchar *offs = g_utf8_offset_to_pointer (text->text, text->selection_start);

		pango_layout_get_cursor_pos (
			text->layout, offs - text->text,
			&strong_pos, &weak_pos);

		if (strong_pos.x != weak_pos.x ||
		    strong_pos.y != weak_pos.y ||
		    strong_pos.width != weak_pos.width ||
		    strong_pos.height != weak_pos.height)
			show_pango_rectangle (text, weak_pos);

		show_pango_rectangle (text, strong_pos);
	}
}

static void
e_text_text_model_changed (ETextModel *model,
                           EText *text)
{
	gint model_len = e_text_model_get_text_length (model);
	text->text = e_text_model_get_text (model);

	/* Make sure our selection doesn't extend past the bounds of our text. */
	text->selection_start = CLAMP (text->selection_start, 0, model_len);
	text->selection_end = CLAMP (text->selection_end,   0, model_len);

	text->needs_reset_layout = 1;
	text->needs_split_into_lines = 1;
	text->needs_redraw = 1;
	e_canvas_item_request_reflow (GNOME_CANVAS_ITEM (text));
	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (text));

	g_signal_emit (text, e_text_signals[E_TEXT_CHANGED], 0);
}

static void
e_text_text_model_reposition (ETextModel *model,
                              ETextModelReposFn fn,
                              gpointer repos_data,
                              gpointer user_data)
{
	EText *text = E_TEXT (user_data);
	gint model_len = e_text_model_get_text_length (model);

	text->selection_start = fn (text->selection_start, repos_data);
	text->selection_end = fn (text->selection_end,   repos_data);

	/* Our repos function should make sure we don't overrun the buffer, but it never
	 * hurts to be paranoid. */
	text->selection_start = CLAMP (text->selection_start, 0, model_len);
	text->selection_end = CLAMP (text->selection_end,   0, model_len);

	if (text->selection_start > text->selection_end) {
		gint tmp = text->selection_start;
		text->selection_start = text->selection_end;
		text->selection_end = tmp;
	}
}

static void
get_bounds (EText *text,
            gdouble *px1,
            gdouble *py1,
            gdouble *px2,
            gdouble *py2)
{
	GnomeCanvasItem *item;
	gdouble wx, wy, clip_width, clip_height;

	item = GNOME_CANVAS_ITEM (text);

	/* Get canvas pixel coordinates for text position */

	wx = 0;
	wy = 0;
	gnome_canvas_item_i2w (item, &wx, &wy);
	gnome_canvas_w2c (item->canvas, wx, wy, &text->cx, &text->cy);
	gnome_canvas_w2c (item->canvas, wx, wy, &text->clip_cx, &text->clip_cy);

	if (text->clip_width < 0)
		clip_width = text->width;
	else
		clip_width = text->clip_width;

	if (text->clip_height < 0)
		clip_height = text->height;
	else
		clip_height = text->clip_height;

	/* Get canvas pixel coordinates for clip rectangle position */
	text->clip_cwidth = clip_width;
	text->clip_cheight = clip_height;

	text->text_cx = text->cx;
	text->text_cy = text->cy;

	/* 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->width;
		*py2 = text->cy + text->height;
	}
}

static void
calc_height (EText *text)
{
	GnomeCanvasItem *item;
	gint old_height;
	gint old_width;
	gint width = 0;
	gint height = 0;

	item = GNOME_CANVAS_ITEM (text);

	/* Calculate text dimensions */

	old_height = text->height;
	old_width = text->width;

	if (text->layout)
		pango_layout_get_pixel_size (text->layout, &width, &height);

	text->height = height;
	text->width = width;

	if (old_height != text->height || old_width != text->width)
		e_canvas_item_request_parent_reflow (item);
}

static void
calc_ellipsis (EText *text)
{
/* FIXME: a pango layout per calc_ellipsis sucks */
	gint width;
	PangoLayout *layout = gtk_widget_create_pango_layout (
		GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas),
		text->ellipsis ? text->ellipsis : "...");
	pango_layout_get_size (layout, &width, NULL);

	text->ellipsis_width = width;

	g_object_unref (layout);
}

static void
split_into_lines (EText *text)
{
	text->num_lines = pango_layout_get_line_count (text->layout);
}

/* Set_arg handler for the text item */
static void
e_text_set_property (GObject *object,
                    guint property_id,
                    const GValue *value,
                    GParamSpec *pspec)
{
	GnomeCanvasItem *item;
	EText *text;
	GdkColor color = { 0, 0, 0, 0, };
	GdkColor *pcolor;

	gboolean needs_update = 0;
	gboolean needs_reflow = 0;

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

	switch (property_id) {
	case PROP_MODEL:

		if (text->model_changed_signal_id)
			g_signal_handler_disconnect (
				text->model,
				text->model_changed_signal_id);

		if (text->model_repos_signal_id)
			g_signal_handler_disconnect (
				text->model,
				text->model_repos_signal_id);

		g_object_unref (text->model);
		text->model = E_TEXT_MODEL (g_value_get_object (value));
		g_object_ref (text->model);

		text->model_changed_signal_id = g_signal_connect (
			text->model, "changed",
			G_CALLBACK (e_text_text_model_changed), text);

		text->model_repos_signal_id = g_signal_connect (
			text->model, "reposition",
			G_CALLBACK (e_text_text_model_reposition), text);

		text->text = e_text_model_get_text (text->model);
		g_signal_emit (text, e_text_signals[E_TEXT_CHANGED], 0);

		text->needs_split_into_lines = 1;
		needs_reflow = 1;
		break;

	case PROP_EVENT_PROCESSOR:
		if (text->tep && text->tep_command_id)
			g_signal_handler_disconnect (
				text->tep,
				text->tep_command_id);
		if (text->tep) {
			g_object_unref (text->tep);
		}
		text->tep = E_TEXT_EVENT_PROCESSOR (g_value_get_object (value));
		g_object_ref (text->tep);

		text->tep_command_id = g_signal_connect (
			text->tep, "command",
			G_CALLBACK (e_text_command), text);

		if (!text->allow_newlines)
			g_object_set (
				text->tep,
				"allow_newlines", FALSE,
				NULL);
		break;

	case PROP_TEXT:
		e_text_model_set_text (text->model, g_value_get_string (value));
		break;

	case PROP_BOLD:
		text->bold = g_value_get_boolean (value);

		text->needs_redraw = 1;
		text->needs_recalc_bounds = 1;
		if (text->line_wrap)
			text->needs_split_into_lines = 1;
		else {
			text->needs_calc_height = 1;
		}
		needs_update = 1;
		needs_reflow = 1;
		break;

	case PROP_STRIKEOUT:
		text->strikeout = g_value_get_boolean (value);
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_ITALIC:
		text->italic = g_value_get_boolean (value);
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_JUSTIFICATION:
		text->justification = g_value_get_enum (value);
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_CLIP_WIDTH:
		text->clip_width = fabs (g_value_get_double (value));
		calc_ellipsis (text);
		if (text->line_wrap) {
			if (text->layout)
				pango_layout_set_width (
					text->layout, text->clip_width < 0
					? -1 : text->clip_width * PANGO_SCALE);
			text->needs_split_into_lines = 1;
		} else {
			text->needs_calc_height = 1;
		}
		needs_reflow = 1;
		break;

	case PROP_CLIP_HEIGHT:
		text->clip_height = fabs (g_value_get_double (value));
		text->needs_recalc_bounds = 1;
		/* toshok: kind of a hack - set needs_reset_layout
		 * here so when something about the style/them
		 * changes, we redraw the text at the proper size/with
		 * the proper font. */
		text->needs_reset_layout = 1;
		needs_reflow = 1;
		break;

	case PROP_CLIP:
		text->clip = g_value_get_boolean (value);
		calc_ellipsis (text);
		if (text->line_wrap)
			text->needs_split_into_lines = 1;
		else {
			text->needs_calc_height = 1;
		}
		needs_reflow = 1;
		break;

	case PROP_FILL_CLIP_RECTANGLE:
		text->fill_clip_rectangle = g_value_get_boolean (value);
		needs_update = 1;
		break;

	case PROP_X_OFFSET:
		text->xofs = g_value_get_double (value);
		text->needs_recalc_bounds = 1;
		needs_update = 1;
		break;

	case PROP_Y_OFFSET:
		text->yofs = g_value_get_double (value);
		text->needs_recalc_bounds = 1;
		needs_update = 1;
		break;

	case PROP_FILL_COLOR:
		if (g_value_get_string (value) &&
		    !gdk_color_parse (g_value_get_string (value), &color)) {
			g_warning ("%s: Failed to parse color '%s'", G_STRFUNC, g_value_get_string (value));
			break;
		}

		text->rgba = ((color.red & 0xff00) << 16 |
			      (color.green & 0xff00) << 8 |
			      (color.blue & 0xff00) |
			      0xff);
		text->rgba_set = TRUE;
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_FILL_COLOR_GDK:
		pcolor = g_value_get_boxed (value);
		if (pcolor) {
			color = *pcolor;
		}

		text->rgba = ((color.red & 0xff00) << 16 |
			      (color.green & 0xff00) << 8 |
			      (color.blue & 0xff00) |
			      0xff);
		text->rgba_set = TRUE;
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_FILL_COLOR_RGBA:
		text->rgba = g_value_get_uint (value);
		color.red = ((text->rgba >> 24) & 0xff) * 0x101;
		color.green = ((text->rgba >> 16) & 0xff) * 0x101;
		color.blue = ((text->rgba >> 8) & 0xff) * 0x101;
		text->rgba_set = TRUE;
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_EDITABLE:
		text->editable = g_value_get_boolean (value);
		text->needs_redraw = 1;
		needs_update = 1;
		break;

	case PROP_USE_ELLIPSIS:
		text->use_ellipsis = g_value_get_boolean (value);
		needs_reflow = 1;
		break;

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

		text->ellipsis = g_strdup (g_value_get_string (value));
		calc_ellipsis (text);
		needs_reflow = 1;
		break;

	case PROP_LINE_WRAP:
		text->line_wrap = g_value_get_boolean (value);
		if (text->line_wrap) {
			if (text->layout) {
				pango_layout_set_width (
					text->layout, text->width < 0
					? -1 : text->width * PANGO_SCALE);
			}
		}
		text->needs_split_into_lines = 1;
		needs_reflow = 1;
		break;

	case PROP_BREAK_CHARACTERS:
		if (text->break_characters) {
			g_free (text->break_characters);
			text->break_characters = NULL;
		}
		if (g_value_get_string (value))
			text->break_characters = g_strdup (g_value_get_string (value));
		text->needs_split_into_lines = 1;
		needs_reflow = 1;
		break;

	case PROP_MAX_LINES:
		text->max_lines = g_value_get_int (value);
		text->needs_split_into_lines = 1;
		needs_reflow = 1;
		break;

	case PROP_WIDTH:
		text->clip_width = fabs (g_value_get_double (value));
		calc_ellipsis (text);
		if (text->line_wrap) {
			if (text->layout) {
				pango_layout_set_width (
					text->layout, text->width < 0 ?
					-1 : text->width * PANGO_SCALE);
			}
			text->needs_split_into_lines = 1;
		}
		else {
			text->needs_calc_height = 1;
		}
		needs_reflow = 1;
		break;

	case PROP_ALLOW_NEWLINES:
		text->allow_newlines = g_value_get_boolean (value);
		_get_tep (text);
		g_object_set (
			text->tep,
			"allow_newlines", g_value_get_boolean (value),
			NULL);
		break;

	case PROP_CURSOR_POS: {
		ETextEventProcessorCommand command;

		command.action = E_TEP_MOVE;
		command.position = E_TEP_VALUE;
		command.value = g_value_get_int (value);
		command.time = GDK_CURRENT_TIME;
		e_text_command (text->tep, &command, text);
		break;
	}

	case PROP_IM_CONTEXT:
		if (text->im_context) {
			disconnect_im_context (text);
			g_object_unref (text->im_context);
		}

		text->im_context = g_value_get_object (value);
		if (text->im_context)
			g_object_ref (text->im_context);

		text->need_im_reset = TRUE;
		break;

	case PROP_HANDLE_POPUP:
		text->handle_popup = g_value_get_boolean (value);
		break;

	default:
		return;
	}

	if (needs_reflow)
		e_canvas_item_request_reflow (item);
	if (needs_update)
		gnome_canvas_item_request_update (item);
}

/* Get_arg handler for the text item */
static void
e_text_get_property (GObject *object,
                    guint property_id,
                    GValue *value,
                    GParamSpec *pspec)
{
	EText *text;

	text = E_TEXT (object);

	switch (property_id) {
	case PROP_MODEL:
		g_value_set_object (value, text->model);
		break;

	case PROP_EVENT_PROCESSOR:
		_get_tep (text);
		g_value_set_object (value, text->tep);
		break;

	case PROP_TEXT:
		g_value_set_string (value, text->text);
		break;

	case PROP_BOLD:
		g_value_set_boolean (value, text->bold);
		break;

	case PROP_STRIKEOUT:
		g_value_set_boolean (value, text->strikeout);
		break;

	case PROP_ITALIC:
		g_value_set_boolean (value, text->italic);
		break;

	case PROP_JUSTIFICATION:
		g_value_set_enum (value, text->justification);
		break;

	case PROP_CLIP_WIDTH:
		g_value_set_double (value, text->clip_width);
		break;

	case PROP_CLIP_HEIGHT:
		g_value_set_double (value, text->clip_height);
		break;

	case PROP_CLIP:
		g_value_set_boolean (value, text->clip);
		break;

	case PROP_FILL_CLIP_RECTANGLE:
		g_value_set_boolean (value, text->fill_clip_rectangle);
		break;

	case PROP_X_OFFSET:
		g_value_set_double (value, text->xofs);
		break;

	case PROP_Y_OFFSET:
		g_value_set_double (value, text->yofs);
		break;

	case PROP_FILL_COLOR_RGBA:
		g_value_set_uint (value, text->rgba);
		break;

	case PROP_TEXT_WIDTH:
		g_value_set_double (value, text->width);
		break;

	case PROP_TEXT_HEIGHT:
		g_value_set_double (value, text->height);
		break;

	case PROP_EDITABLE:
		g_value_set_boolean (value, text->editable);
		break;

	case PROP_USE_ELLIPSIS:
		g_value_set_boolean (value, text->use_ellipsis);
		break;

	case PROP_ELLIPSIS:
		g_value_set_string (value, text->ellipsis);
		break;

	case PROP_LINE_WRAP:
		g_value_set_boolean (value, text->line_wrap);
		break;

	case PROP_BREAK_CHARACTERS:
		g_value_set_string (value, text->break_characters);
		break;

	case PROP_MAX_LINES:
		g_value_set_int (value, text->max_lines);
		break;

	case PROP_WIDTH:
		g_value_set_double (value, text->clip_width);
		break;

	case PROP_HEIGHT:
		g_value_set_double (
			value, text->clip &&
			text->clip_height != -1 ?
			text->clip_height : text->height);
		break;

	case PROP_ALLOW_NEWLINES:
		g_value_set_boolean (value, text->allow_newlines);
		break;

	case PROP_CURSOR_POS:
		g_value_set_int (value, text->selection_start);
		break;

	case PROP_IM_CONTEXT:
		g_value_set_object (value, text->im_context);
		break;

	case PROP_HANDLE_POPUP:
		g_value_set_boolean (value, text->handle_popup);
		break;

	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
		break;
	}
}

/* Update handler for the text item */
static void
e_text_reflow (GnomeCanvasItem *item,
               gint flags)
{
	EText *text;

	text = E_TEXT (item);

	if (text->needs_reset_layout) {
		reset_layout (text);
		text->needs_reset_layout = 0;
		text->needs_calc_height = 1;
	}

	if (text->needs_split_into_lines) {
		split_into_lines (text);

		text->needs_split_into_lines = 0;
		text->needs_calc_height = 1;
	}

	if (text->needs_calc_height) {
		calc_height (text);
		gnome_canvas_item_request_update (item);
		text->needs_calc_height = 0;
		text->needs_recalc_bounds = 1;
	}
}

/* Update handler for the text item */
static void
e_text_update (GnomeCanvasItem *item,
               const cairo_matrix_t *i2c,
               gint flags)
{
	EText *text;
	gdouble x1, y1, x2, y2;

	text = E_TEXT (item);

	if (GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->update)
		GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->update (
			item, i2c, flags);

	if (text->needs_recalc_bounds
	     || (flags & GNOME_CANVAS_UPDATE_AFFINE)) {
		get_bounds (text, &x1, &y1, &x2, &y2);
		if (item->x1 != x1 ||
		    item->x2 != x2 ||
		    item->y1 != y1 ||
		    item->y2 != y2) {
			gnome_canvas_request_redraw (
				item->canvas, item->x1, item->y1,
				item->x2, item->y2);
			item->x1 = x1;
			item->y1 = y1;
			item->x2 = x2;
			item->y2 = y2;
			text->needs_redraw = 1;
			item->canvas->need_repick = TRUE;
		}
		if (!text->fill_clip_rectangle)
			item->canvas->need_repick = TRUE;
		text->needs_recalc_bounds = 0;
	}
	if (text->needs_redraw) {
		gnome_canvas_request_redraw (
			item->canvas, item->x1, item->y1, item->x2, item->y2);
		text->needs_redraw = 0;
	}
}

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

	text = E_TEXT (item);

	if (GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->realize)
		(* GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->realize) (item);

	create_layout (text);

	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);

	g_object_unref (text->i_cursor);
	text->i_cursor = NULL;
	g_object_unref (text->default_cursor);
	text->default_cursor = NULL;

	if (GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->unrealize)
		(* GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->unrealize) (item);
}

static void
_get_tep (EText *text)
{
	if (!text->tep) {
		text->tep = e_text_event_processor_emacs_like_new ();

		text->tep_command_id = g_signal_connect (
			text->tep, "command",
			G_CALLBACK (e_text_command), text);
	}
}

static void
draw_pango_rectangle (cairo_t *cr,
                      gint x1,
                      gint y1,
                      PangoRectangle rect)
{
	gint width = rect.width / PANGO_SCALE;
	gint height = rect.height / PANGO_SCALE;

	if (width <= 0)
		width = 1;
	if (height <= 0)
		height = 1;

	cairo_rectangle (
		cr, x1 + rect.x / PANGO_SCALE,
		y1 + rect.y / PANGO_SCALE, width, height);
	cairo_fill (cr);
}

static gboolean
show_pango_rectangle (EText *text,
                      PangoRectangle rect)
{
	gint x1 = rect.x / PANGO_SCALE;
	gint x2 = (rect.x + rect.width) / PANGO_SCALE;

	gint y1 = rect.y / PANGO_SCALE;
	gint y2 = (rect.y + rect.height) / PANGO_SCALE;

	gint new_xofs_edit = text->xofs_edit;
	gint new_yofs_edit = text->yofs_edit;

	gint clip_width, clip_height;

	clip_width = text->clip_width;
	clip_height = text->clip_height;

	if (x1 < new_xofs_edit)
		new_xofs_edit = x1;

	if (y1 < new_yofs_edit)
		new_yofs_edit = y1;

	if (clip_width >= 0) {
		if (2 + x2 - clip_width > new_xofs_edit)
			new_xofs_edit = 2 + x2 - clip_width;
	} else {
		new_xofs_edit = 0;
	}

	if (clip_height >= 0) {
		if (y2 - clip_height > new_yofs_edit)
			new_yofs_edit = y2 - clip_height;
	} else {
		new_yofs_edit = 0;
	}

	if (new_xofs_edit < 0)
		new_xofs_edit = 0;
	if (new_yofs_edit < 0)
		new_yofs_edit = 0;

	if (new_xofs_edit != text->xofs_edit ||
	    new_yofs_edit != text->yofs_edit) {
		text->xofs_edit = new_xofs_edit;
		text->yofs_edit = new_yofs_edit;
		return TRUE;
	}

	return FALSE;
}

/* Draw handler for the text item */
static void
e_text_draw (GnomeCanvasItem *item,
             cairo_t *cr,
             gint x,
             gint y,
             gint width,
             gint height)
{
	EText *text;
	gint xpos, ypos;
	GnomeCanvas *canvas;
	GtkWidget *widget;
	GdkRGBA rgba;
	gboolean backdrop;

	text = E_TEXT (item);
	canvas = GNOME_CANVAS_ITEM (text)->canvas;
	widget = GTK_WIDGET (canvas);
	backdrop = (gtk_widget_get_state_flags (widget) & GTK_STATE_FLAG_BACKDROP) != 0;

	cairo_save (cr);

	if (!text->rgba_set) {
		e_utils_get_theme_color (widget, backdrop ? "theme_unfocused_fg_color,theme_fg_color" : "theme_fg_color", E_UTILS_DEFAULT_THEME_FG_COLOR, &rgba);
		gdk_cairo_set_source_rgba (cr, &rgba);
	} else {
		cairo_set_source_rgba (
			cr,
			((text->rgba >> 24) & 0xff) / 255.0,
			((text->rgba >> 16) & 0xff) / 255.0,
			((text->rgba >> 8) & 0xff) / 255.0,
			( text->rgba & 0xff) / 255.0);
	}

	/* Insert preedit text only when im_context signals are connected &
	 * text->preedit_len is not zero */
	if (text->im_context_signals_registered && text->preedit_len)
		insert_preedit_text (text);

	/* Need to reset the layout to cleanly clear the preedit buffer when
	 * typing in CJK & using backspace on the preedit */
	if (!text->preedit_len)
		reset_layout (text);

	if (!pango_layout_get_text (text->layout)) {
		cairo_restore (cr);
		return;
	}

	xpos = text->text_cx;
	ypos = text->text_cy;

	xpos = xpos - x + text->xofs;
	ypos = ypos - y + text->yofs;

	cairo_save (cr);

	if (text->clip) {
		cairo_rectangle (
			cr, xpos, ypos,
			text->clip_cwidth - text->xofs,
			text->clip_cheight - text->yofs);
		cairo_clip (cr);
	}

	if (text->editing) {
		xpos -= text->xofs_edit;
		ypos -= text->yofs_edit;
	}

	cairo_move_to (cr, xpos, ypos);
	pango_cairo_show_layout (cr, text->layout);

	if (text->editing) {
		if (text->selection_start != text->selection_end) {
			cairo_region_t *clip_region;
			gint indices[2];

			indices[0] = MIN (
				text->selection_start,
				text->selection_end);
			indices[1] = MAX (
				text->selection_start,
				text->selection_end);

			/* convert these into byte indices */
			indices[0] = g_utf8_offset_to_pointer (
				text->text, indices[0]) - text->text;
			indices[1] = g_utf8_offset_to_pointer (
				text->text, indices[1]) - text->text;

			clip_region = gdk_pango_layout_get_clip_region (
				text->layout, xpos, ypos, indices, 1);
			gdk_cairo_region (cr, clip_region);
			cairo_clip (cr);
			cairo_region_destroy (clip_region);

			e_utils_get_theme_color (widget, backdrop ? "theme_unfocused_base_color,theme_base_color" : "theme_base_color", E_UTILS_DEFAULT_THEME_BASE_COLOR, &rgba);

			gdk_cairo_set_source_rgba (cr, &rgba);
			cairo_paint (cr);

			e_utils_get_theme_color (widget, backdrop ? "theme_unfocused_text_color,theme_text_color,theme_fg_color" : "theme_text_color,theme_fg_color", E_UTILS_DEFAULT_THEME_TEXT_COLOR, &rgba);
			gdk_cairo_set_source_rgba (cr, &rgba);
			cairo_move_to (cr, xpos, ypos);
			pango_cairo_show_layout (cr, text->layout);
		} else {
			if (text->show_cursor) {
				PangoRectangle strong_pos, weak_pos;
				gchar *offs;

				offs = g_utf8_offset_to_pointer (
					text->text, text->selection_start);

				pango_layout_get_cursor_pos (
					text->layout, offs - text->text +
					text->preedit_len, &strong_pos,
					&weak_pos);
				draw_pango_rectangle (cr, xpos, ypos, strong_pos);
				if (strong_pos.x != weak_pos.x ||
				    strong_pos.y != weak_pos.y ||
				    strong_pos.width != weak_pos.width ||
				    strong_pos.height != weak_pos.height)
					draw_pango_rectangle (cr, xpos, ypos, weak_pos);
			}
		}
	}

	cairo_restore (cr);
	cairo_restore (cr);
}

/* Point handler for the text item */
static GnomeCanvasItem *
e_text_point (GnomeCanvasItem *item,
              gdouble x,
              gdouble y,
              gint cx,
              gint cy)
{
	EText *text;
	gdouble clip_width;
	gdouble clip_height;

	text = E_TEXT (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->clip_width < 0)
		clip_width = text->width;
	else
		clip_width = text->clip_width;

	if (text->clip_height < 0)
		clip_height = text->height;
	else
		clip_height = text->clip_height;

	if (cx < text->clip_cx ||
	    cx > text->clip_cx + clip_width ||
	    cy < text->clip_cy ||
	    cy > text->clip_cy + clip_height)
		return NULL;

	if (text->fill_clip_rectangle || !text->text || !*text->text)
		return item;

	cx -= text->cx;

	if (pango_layout_xy_to_index (text->layout, cx, cy, NULL, NULL))
		return item;

	return NULL;
}

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

	text = E_TEXT (item);

	*x1 = 0;
	*y1 = 0;

	width = text->width;
	height = text->height;

	if (text->clip) {
		if (text->clip_width >= 0)
			width = text->clip_width;
		if (text->clip_height >= 0)
			height = text->clip_height;
	}

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

static gint
get_position_from_xy (EText *text,
                      gint x,
                      gint y)
{
	gint index;
	gint trailing;

	x -= text->xofs;
	y -= text->yofs;

	if (text->editing) {
		x += text->xofs_edit;
		y += text->yofs_edit;
	}

	x -= text->cx;
	y -= text->cy;

	pango_layout_xy_to_index (
		text->layout, x * PANGO_SCALE,
		y * PANGO_SCALE, &index, &trailing);

	return g_utf8_pointer_to_offset (text->text, text->text + index + trailing);
}

#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 && text->clip) {
		gint old_xofs_edit = text->xofs_edit;
		gint old_yofs_edit = text->yofs_edit;

		if (text->clip_cwidth >= 0 &&
		    text->lastx - text->clip_cx > text->clip_cwidth &&
		    text->xofs_edit < text->width - text->clip_cwidth) {
			text->xofs_edit += 4;
			if (text->xofs_edit > text->width - text->clip_cwidth + 1)
				text->xofs_edit = text->width - text->clip_cwidth + 1;
		}
		if (text->lastx - text->clip_cx < 0 &&
		    text->xofs_edit > 0) {
			text->xofs_edit -= 4;
			if (text->xofs_edit < 0)
				text->xofs_edit = 0;
		}

		if (text->clip_cheight >= 0 &&
		    text->lasty - text->clip_cy > text->clip_cheight &&
		    text->yofs_edit < text->height - text->clip_cheight) {
			text->yofs_edit += 4;
			if (text->yofs_edit > text->height - text->clip_cheight + 1)
				text->yofs_edit = text->height - text->clip_cheight + 1;
		}
		if (text->lasty - text->clip_cy < 0 &&
		    text->yofs_edit > 0) {
			text->yofs_edit -= 4;
			if (text->yofs_edit < 0)
				text->yofs_edit = 0;
		}

		if (old_xofs_edit != text->xofs_edit ||
		    old_yofs_edit != text->yofs_edit) {
			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;
			redraw = TRUE;
		}
	}

	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) {
		text->needs_redraw = 1;
		gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (text));
	}
	return TRUE;
}

static void
start_editing (EText *text)
{
	if (text->editing)
		return;

	e_text_reset_im_context (text);

	g_free (text->revert);
	text->revert = g_strdup (text->text);

	text->editing = TRUE;
	if (text->pointer_in) {
		GdkWindow *window;

		window = gtk_widget_get_window (
			GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas));

		if (text->default_cursor_shown) {
			gdk_window_set_cursor (window, text->i_cursor);
			text->default_cursor_shown = FALSE;
		}
	}
	text->select_by_word = FALSE;
	text->xofs_edit = 0;
	text->yofs_edit = 0;
	if (text->timeout_id == 0) {
		text->timeout_id = e_named_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);
}

void
e_text_stop_editing (EText *text)
{
	if (!text->editing)
		return;

	g_free (text->revert);
	text->revert = NULL;

	text->editing = FALSE;
	if (!text->default_cursor_shown) {
		GdkWindow *window;

		window = gtk_widget_get_window (
			GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas));
		gdk_window_set_cursor (window, text->default_cursor);
		text->default_cursor_shown = TRUE;
	}
	if (text->timer) {
		g_timer_stop (text->timer);
		g_timer_destroy (text->timer);
		text->timer = NULL;
	}

	text->need_im_reset = TRUE;
	text->preedit_len = 0;
	text->preedit_pos = 0;
}

void
e_text_cancel_editing (EText *text)
{
	if (text->revert)
		e_text_model_set_text (text->model, text->revert);
	e_text_stop_editing (text);
}

static gboolean
_click (gpointer data)
{
	*(gint *)data = 0;
	return FALSE;
}

static gint
e_text_event (GnomeCanvasItem *item,
              GdkEvent *event)
{
	EText *text = E_TEXT (item);
	ETextEventProcessorEvent e_tep_event;
	GdkWindow *window;
	gint return_val = 0;

	if (!text->model)
		return 0;

	window = gtk_widget_get_window (GTK_WIDGET (item->canvas));

	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->im_context) {
					if (!text->im_context_signals_registered) {
						g_signal_connect (
							text->im_context, "commit",
							G_CALLBACK (e_text_commit_cb), text);
						g_signal_connect (
							text->im_context, "preedit_changed",
							G_CALLBACK (e_text_preedit_changed_cb), text);
						g_signal_connect (
							text->im_context, "retrieve_surrounding",
							G_CALLBACK (e_text_retrieve_surrounding_cb), text);
						g_signal_connect (
							text->im_context, "delete_surrounding",
							G_CALLBACK (e_text_delete_surrounding_cb), text);
						text->im_context_signals_registered = TRUE;
					}
					gtk_im_context_focus_in (text->im_context);
				}

				start_editing (text);

				/* So we'll redraw and the
				 * cursor will be shown. */
				text->show_cursor = FALSE;
			} else {
				if (text->im_context) {
					gtk_im_context_focus_out (text->im_context);
					disconnect_im_context (text);
					text->need_im_reset = TRUE;
				}

				e_text_stop_editing (text);
				if (text->timeout_id) {
					g_source_remove (text->timeout_id);
					text->timeout_id = 0;
				}
				if (text->show_cursor) {
					text->show_cursor = FALSE;
					text->needs_redraw = 1;
					gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (text));
				}
			}
			if (text->line_wrap)
				text->needs_split_into_lines = 1;
			e_canvas_item_request_reflow (GNOME_CANVAS_ITEM (text));
		}
		return_val = 0;
		break;
	case GDK_KEY_PRESS:

		/* Handle S-F10 key binding here. */

		if (event->key.keyval == GDK_KEY_F10
		    && (event->key.state & GDK_SHIFT_MASK)
		    && text->handle_popup) {

			/* Simulate a GdkEventButton here, so that we can
			 * call e_text_do_popup directly */

			GdkEvent *button_event;

			button_event = gdk_event_new (GDK_BUTTON_PRESS);
			button_event->button.time = event->key.time;
			button_event->button.button = 0;
			e_text_do_popup (text, button_event, 0);
			return 1;
		}

		/* Fall Through */

	case GDK_KEY_RELEASE:

		if (text->editing) {
			GdkEventKey key;
			gint ret;

			if (text->im_context &&
				gtk_im_context_filter_keypress (
					text->im_context,
					(GdkEventKey *) event)) {
				text->need_im_reset = TRUE;
				return 1;
			}

			key = event->key;
			e_tep_event.key.time = key.time;
			e_tep_event.key.state = key.state;
			e_tep_event.key.keyval = key.keyval;

			/* This is probably ugly hack, but we
			 * have to handle UTF-8 input somehow. */
			e_tep_event.key.string = e_utf8_from_gtk_event_key (
				GTK_WIDGET (item->canvas),
				key.keyval, key.string);
			if (e_tep_event.key.string != NULL) {
				e_tep_event.key.length = strlen (e_tep_event.key.string);
			} else {
				e_tep_event.key.length = 0;
			}

			_get_tep (text);
			ret = e_text_event_processor_handle_event (text->tep, &e_tep_event);

			if (event->type == GDK_KEY_PRESS)
				g_signal_emit (
					text, e_text_signals[E_TEXT_KEYPRESS], 0,
					e_tep_event.key.keyval, e_tep_event.key.state);

			if (e_tep_event.key.string)
				g_free ((gpointer) e_tep_event.key.string);

			return ret;
		}
		break;
	case GDK_BUTTON_PRESS: /* Fall Through */
	case GDK_BUTTON_RELEASE:
		if ((!text->editing)
		    && text->editable
		    && (event->button.button == 1 ||
			event->button.button == 2)) {
			e_canvas_item_grab_focus (item, TRUE);
			start_editing (text);
		}

		/* We follow convention and emit popup events on right-clicks. */
		if (event->type == GDK_BUTTON_PRESS && event->button.button == 3) {
			if (text->handle_popup) {
				e_text_do_popup (
					text, event,
					get_position_from_xy (
						text, event->button.x,
						event->button.y));
				return 1;
			}
			else {
				break;
			}
		}

		/* Create our own double and triple click events,
		 * as gnome-canvas doesn't forward them to us */
		if (event->type == GDK_BUTTON_PRESS) {
			if (text->dbl_timeout == 0 &&
			    text->tpl_timeout == 0) {
				text->dbl_timeout = e_named_timeout_add (
					200, _click, &(text->dbl_timeout));
			} else {
				if (text->tpl_timeout == 0) {
					e_tep_event.type = GDK_2BUTTON_PRESS;
					text->tpl_timeout = e_named_timeout_add (
						200, _click, &(text->tpl_timeout));
				} else {
					e_tep_event.type = GDK_3BUTTON_PRESS;
				}
			}
		}

		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);
			e_tep_event.button.device =
				gdk_event_get_device (event);
			_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;
		}
		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 (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 (
					window, text->default_cursor);
				text->default_cursor_shown = TRUE;
			}
		}
		break;
	default:
		break;
	}
	if (return_val)
		return return_val;
	if (GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->event)
		return GNOME_CANVAS_ITEM_CLASS (e_text_parent_class)->event (item, event);
	else
		return 0;
}

void
e_text_copy_clipboard (EText *text)
{
	gint selection_start_pos;
	gint selection_end_pos;

	selection_start_pos = MIN (text->selection_start, text->selection_end);
	selection_end_pos = MAX (text->selection_start, text->selection_end);

	/* convert sel_start/sel_end to byte indices */
	selection_start_pos = g_utf8_offset_to_pointer (
		text->text, selection_start_pos) - text->text;
	selection_end_pos = g_utf8_offset_to_pointer (
		text->text, selection_end_pos) - text->text;

	gtk_clipboard_set_text (
		gtk_widget_get_clipboard (
		GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas),
		GDK_SELECTION_CLIPBOARD),
		text->text + selection_start_pos,
		selection_end_pos - selection_start_pos);
}

void
e_text_delete_selection (EText *text)
{
	gint sel_start, sel_end;

	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_model_delete (text->model, sel_start, sel_end - sel_start);
	text->need_im_reset = TRUE;
}

void
e_text_cut_clipboard (EText *text)
{
	e_text_copy_clipboard (text);
	e_text_delete_selection (text);
}

void
e_text_paste_clipboard (EText *text)
{
	ETextEventProcessorCommand command;

	command.action = E_TEP_PASTE;
	command.position = E_TEP_SELECTION;
	command.string = "";
	command.value = 0;
	e_text_command (text->tep, &command, text);
}

void
e_text_select_all (EText *text)
{
	ETextEventProcessorCommand command;

	command.action = E_TEP_SELECT;
	command.position = E_TEP_SELECT_ALL;
	command.string = "";
	command.value = 0;
	e_text_command (text->tep, &command, text);
}

static void
primary_get_cb (GtkClipboard *clipboard,
                GtkSelectionData *selection_data,
                guint info,
                gpointer data)
{
	EText *text = E_TEXT (data);
	gint sel_start, sel_end;

	sel_start = MIN (text->selection_start, text->selection_end);
	sel_end = MAX (text->selection_start, text->selection_end);

	/* convert sel_start/sel_end to byte indices */
	sel_start = g_utf8_offset_to_pointer (text->text, sel_start) - text->text;
	sel_end = g_utf8_offset_to_pointer (text->text, sel_end) - text->text;

	if (sel_start != sel_end) {
		gtk_selection_data_set_text (
			selection_data,
			text->text + sel_start,
			sel_end - sel_start);
	}
}

static void
primary_clear_cb (GtkClipboard *clipboard,
                  gpointer data)
{
#ifdef notyet
	/* XXX */
	gtk_editable_select_region (
		GTK_EDITABLE (entry), entry->current_pos, entry->current_pos);
#endif
}

static void
e_text_update_primary_selection (EText *text)
{
	static const GtkTargetEntry targets[] = {
		{ (gchar *) "UTF8_STRING", 0, 0 },
		{ (gchar *) "UTF-8", 0, 0 },
		{ (gchar *) "STRING", 0, 0 },
		{ (gchar *) "TEXT", 0, 0 },
		{ (gchar *) "COMPOUND_TEXT", 0, 0 }
	};
	GtkClipboard *clipboard;

	clipboard = gtk_widget_get_clipboard (
		GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas),
		GDK_SELECTION_PRIMARY);

	if (text->selection_start != text->selection_end) {
		if (!gtk_clipboard_set_with_owner (
			clipboard, targets, G_N_ELEMENTS (targets),
			primary_get_cb, primary_clear_cb, G_OBJECT (text)))
			primary_clear_cb (clipboard, text);
	} else {
		if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (text))
			gtk_clipboard_clear (clipboard);
	}
}

static void
paste_received (GtkClipboard *clipboard,
                const gchar *text,
                gpointer data)
{
	EText *etext = E_TEXT (data);

	if (text && g_utf8_validate (text, strlen (text), NULL)) {
		if (etext->selection_end != etext->selection_start)
			e_text_delete_selection (etext);

		e_text_insert (etext, text);
	}

	g_object_unref (etext);
}

static void
e_text_paste (EText *text,
              GdkAtom selection)
{
	g_object_ref (text);
	gtk_clipboard_request_text (
		gtk_widget_get_clipboard (
		GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas),
		selection), paste_received, text);
}

typedef struct {
	EText *text;
	GdkEvent *event;
	gint position;
} PopupClosure;

static void
popup_menu_detach (GtkWidget *attach_widget,
                   GtkMenu *menu)
{
}

static void
popup_menu_placement_cb (GtkMenu *menu,
                         gint *x,
                         gint *y,
                         gboolean *push_in,
                         gpointer user_data)
{
	EText *text = E_TEXT (user_data);
	GnomeCanvasItem *item = &text->item;
	GnomeCanvas *parent = item->canvas;

	if (parent) {
		GdkWindow *window;

		window = gtk_widget_get_window (GTK_WIDGET (parent));
		gdk_window_get_origin (window, x, y);
		*x += item->x1 + text->width / 2;
		*y += item->y1 + text->height / 2;
	}

	return;
}

static void
popup_targets_received (GtkClipboard *clipboard,
                        GtkSelectionData *data,
                        gpointer user_data)
{
	PopupClosure *closure = user_data;
	EText *text = closure->text;
	GdkEvent *event = closure->event;
	gint position = closure->position;
	GtkWidget *popup_menu = gtk_menu_new ();
	GtkWidget *menuitem, *submenu;
	guint event_button = 0;
	guint32 event_time;

	gdk_event_get_button (event, &event_button);
	event_time = gdk_event_get_time (event);

	g_free (closure);

	gtk_menu_attach_to_widget (
		GTK_MENU (popup_menu),
		GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas),
		popup_menu_detach);

	/* cut menu item */
	menuitem = gtk_image_menu_item_new_with_mnemonic (_("Cu_t"));
	gtk_image_menu_item_set_image (
		GTK_IMAGE_MENU_ITEM (menuitem),
		gtk_image_new_from_icon_name ("edit-cut", GTK_ICON_SIZE_MENU));
	gtk_widget_show (menuitem);
	gtk_menu_shell_append (GTK_MENU_SHELL (popup_menu), menuitem);
	g_signal_connect_swapped (
		menuitem, "activate",
		G_CALLBACK (e_text_cut_clipboard), text);
	gtk_widget_set_sensitive (
		menuitem, text->editable &&
		(text->selection_start != text->selection_end));

	/* copy menu item */
	menuitem = gtk_image_menu_item_new_with_mnemonic (_("_Copy"));
	gtk_image_menu_item_set_image (
		GTK_IMAGE_MENU_ITEM (menuitem),
		gtk_image_new_from_icon_name ("edit-copy", GTK_ICON_SIZE_MENU));
	gtk_widget_show (menuitem);
	gtk_menu_shell_append (GTK_MENU_SHELL (popup_menu), menuitem);
	g_signal_connect_swapped (
		menuitem, "activate",
		G_CALLBACK (e_text_copy_clipboard), text);
	gtk_widget_set_sensitive (menuitem, text->selection_start != text->selection_end);

	/* paste menu item */
	menuitem = gtk_image_menu_item_new_with_mnemonic (_("_Paste"));
	gtk_image_menu_item_set_image (
		GTK_IMAGE_MENU_ITEM (menuitem),
		gtk_image_new_from_icon_name ("edit-paste", GTK_ICON_SIZE_MENU));
	gtk_widget_show (menuitem);
	gtk_menu_shell_append (GTK_MENU_SHELL (popup_menu), menuitem);
	g_signal_connect_swapped (
		menuitem, "activate",
		G_CALLBACK (e_text_paste_clipboard), text);
	gtk_widget_set_sensitive (
		menuitem, text->editable &&
		gtk_selection_data_targets_include_text (data));

	menuitem = gtk_menu_item_new_with_label (_("Select All"));
	gtk_widget_show (menuitem);
	gtk_menu_shell_append (GTK_MENU_SHELL (popup_menu), menuitem);
	g_signal_connect_swapped (
		menuitem, "activate",
		G_CALLBACK (e_text_select_all), text);
	gtk_widget_set_sensitive (menuitem, strlen (text->text) > 0);

	menuitem = gtk_separator_menu_item_new ();
	gtk_widget_show (menuitem);
	gtk_menu_shell_append (GTK_MENU_SHELL (popup_menu), menuitem);

	if (text->im_context && GTK_IS_IM_MULTICONTEXT (text->im_context)) {
		menuitem = gtk_menu_item_new_with_label (_("Input Methods"));
		gtk_widget_show (menuitem);
		submenu = gtk_menu_new ();
		gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);

		gtk_menu_shell_append (GTK_MENU_SHELL (popup_menu), menuitem);

		gtk_im_multicontext_append_menuitems (
			GTK_IM_MULTICONTEXT (text->im_context),
			GTK_MENU_SHELL (submenu));
	}

	g_signal_emit (
		text,
		e_text_signals[E_TEXT_POPULATE_POPUP],
		0,
		event,
		position,
		popup_menu);

	/* If invoked by S-F10 key binding, button will be 0. */
	if (event_button == 0) {
		gtk_menu_popup (
			GTK_MENU (popup_menu), NULL, NULL,
			popup_menu_placement_cb, (gpointer) text,
			event_button, GDK_CURRENT_TIME);
	} else {
		gtk_menu_popup (
			GTK_MENU (popup_menu), NULL, NULL,
			NULL, NULL,
			event_button, event_time);
	}

	g_object_unref (text);
	gdk_event_free (event);
}

static void
e_text_do_popup (EText *text,
                 GdkEvent *button_event,
                 gint position)
{
	PopupClosure *closure = g_new (PopupClosure, 1);

	closure->text = g_object_ref (text);
	closure->event = gdk_event_copy (button_event);
	closure->position = position;

	gtk_clipboard_request_contents (
		gtk_widget_get_clipboard (
			GTK_WIDGET (GNOME_CANVAS_ITEM (text)->canvas),
			GDK_SELECTION_CLIPBOARD),
		gdk_atom_intern ("TARGETS", FALSE),
		popup_targets_received,
		closure);
}

static void
e_text_reset_im_context (EText *text)
{
	if (text->need_im_reset && text->im_context) {
		text->need_im_reset = FALSE;
		gtk_im_context_reset (text->im_context);
	}
}

/* fixme: */

static gint
next_word (EText *text,
           gint start)
{
	gchar *p = g_utf8_offset_to_pointer (text->text, start);
	gint length;

	length = g_utf8_strlen (text->text, -1);

	if (start >= length) {
		return length;
	} else {
		p = g_utf8_next_char (p);
		start++;

		while (p && *p) {
			gunichar unival = g_utf8_get_char (p);
			if (g_unichar_isspace (unival)) {
				return start + 1;
			}
			else {
				p = g_utf8_next_char (p);
				start++;
			}
		}
	}

	return g_utf8_pointer_to_offset (text->text, p);
}

static gint
find_offset_into_line (EText *text,
                       gint offset_into_text,
                       gchar **start_of_line)
{
	gchar *p;

	p = g_utf8_offset_to_pointer (text->text, offset_into_text);

	if (p == text->text) {
		if (start_of_line)
			*start_of_line = (gchar *)text->text;
		return 0;
	}
	else {
		p = g_utf8_find_prev_char (text->text, p);

		while (p && p > text->text) {
			if (*p == '\n') {
				if (start_of_line)
					*start_of_line = p+1;
				return offset_into_text -
					g_utf8_pointer_to_offset (
					text->text, p + 1);
			}
			p = g_utf8_find_prev_char (text->text, p);
		}

		if (start_of_line)
			*start_of_line = (gchar *)text->text;
		return offset_into_text;
	}
}

/* direction = TRUE (move forward), FALSE (move backward)
 * Any error shall return length (text->text) or 0 or
 * text->selection_end (as deemed fit) */
static gint
_get_updated_position (EText *text,
                       gboolean direction)
{
	PangoLogAttr *log_attrs = NULL;
	gint n_attrs;
	gchar *p = NULL;
	gint new_pos = 0;
	gint length = 0;

	/* Basic sanity test, return whatever position we are currently at. */
	g_return_val_if_fail (text->layout != NULL, text->selection_end);

	length = g_utf8_strlen (text->text, -1);

	/* length checks to make sure we are not wandering
	 * off into nonexistant memory... */
	if ((text->selection_end >= length) && (TRUE == direction))	/* forward */
		return length;
	/* checking for -ve value wont hurt! */
	if ((text->selection_end <= 0) && (FALSE == direction))		/* backward */
		return 0;

	/* check for validness of full text->text */
	if (!g_utf8_validate (text->text, -1, NULL))
		return text->selection_end;

	/* get layout's PangoLogAttr to facilitate moving when
	 * moving across grapheme cluster as in indic langs */
	pango_layout_get_log_attrs (text->layout, &log_attrs, &n_attrs);

	/* Fetch the current gchar index in the line & keep moving
	 * forward until we can display cursor */
	p = g_utf8_offset_to_pointer (text->text, text->selection_end);

	new_pos = text->selection_end;
	while (1)
	{
		/* check before moving forward/backwards
		 * if we have more chars to move or not */
		if (TRUE == direction)
			p = g_utf8_next_char (p);
		else
			p = g_utf8_prev_char (p);

		/* validate the new string & return with original position if check fails */
		if (!g_utf8_validate (p, -1, NULL))
			break;	/* will return old value of new_pos */

		new_pos = g_utf8_pointer_to_offset (text->text, p);

		/* if is_cursor_position is set, cursor can appear in front of character.
		 * i.e. this is a grapheme boundary AND make some sanity checks */
		if ((new_pos >=0) && (new_pos < n_attrs) &&
			(log_attrs[new_pos].is_cursor_position))
			break;
		else if ((new_pos < 0) || (new_pos >= n_attrs))
		{
			new_pos = text->selection_end;
			break;
		}
	}

	if (log_attrs)
		g_free (log_attrs);

	return new_pos;
}

static gint
_get_position (EText *text,
               ETextEventProcessorCommand *command)
{
	gint length, obj_num;
	gunichar unival;
	gchar *p = NULL;
	gint new_pos = 0;

	switch (command->position) {

	case E_TEP_VALUE:
		new_pos = command->value;
		break;

	case E_TEP_SELECTION:
		new_pos = text->selection_end;
		break;

	case E_TEP_START_OF_BUFFER:
		new_pos = 0;
		break;

	case E_TEP_END_OF_BUFFER:
		new_pos = strlen (text->text);
		break;

	case E_TEP_START_OF_LINE:

		if (text->selection_end >= 1) {

			p = g_utf8_offset_to_pointer (text->text, text->selection_end);
			if (p != text->text) {
				p = g_utf8_find_prev_char (text->text, p);
				while (p && p > text->text) {
					if (*p == '\n') {
						new_pos = g_utf8_pointer_to_offset (text->text, p) + 1;
						break;
					}
					p = g_utf8_find_prev_char (text->text, p);
				}
			}
		}

		break;

	case E_TEP_END_OF_LINE:
		new_pos = -1;
		length = g_utf8_strlen (text->text, -1);

		if (text->selection_end >= length) {
			new_pos = length;
		} else {

			p = g_utf8_offset_to_pointer (text->text, text->selection_end);

			while (p && *p) {
				if (*p == '\n') {
					new_pos = g_utf8_pointer_to_offset (text->text, p);
					p = NULL;
				} else
					p = g_utf8_next_char (p);
			}
		}

		if (new_pos == -1)
			new_pos = g_utf8_pointer_to_offset (text->text, p);

		break;

	case E_TEP_FORWARD_CHARACTER:
		length = g_utf8_strlen (text->text, -1);

		if (text->selection_end >= length)
			new_pos = length;
		else
			/* get updated position to display cursor */
			new_pos = _get_updated_position (text, TRUE);

		break;

	case E_TEP_BACKWARD_CHARACTER:
		new_pos = 0;
		if (text->selection_end >= 1)
			/* get updated position to display cursor */
			new_pos = _get_updated_position (text, FALSE);

		break;

	case E_TEP_FORWARD_WORD:
		new_pos = next_word (text, text->selection_end);
		break;

	case E_TEP_BACKWARD_WORD:
		new_pos = 0;
		if (text->selection_end >= 1) {
			gint pos = text->selection_end;

			p = g_utf8_find_prev_char (
				text->text, g_utf8_offset_to_pointer (
				text->text, text->selection_end));
			pos--;

			if (p != text->text) {
				p = g_utf8_find_prev_char (text->text, p);
				pos--;

				while (p && p > text->text) {
					unival = g_utf8_get_char (p);
					if (g_unichar_isspace (unival)) {
						new_pos = pos + 1;
						p = NULL;
					}
					else {
						p = g_utf8_find_prev_char (text->text, p);
						pos--;
					}
				}
			}
		}

		break;

	case E_TEP_FORWARD_LINE: {
		gint offset_into_line;

		offset_into_line = find_offset_into_line (text, text->selection_end, NULL);
		if (offset_into_line == -1)
			return text->selection_end;

		/* now we search forward til we hit a \n, and then
		 * offset_into_line more characters */
		p = g_utf8_offset_to_pointer (text->text, text->selection_end);
		while (p && *p) {
			if (*p == '\n')
				break;
			p = g_utf8_next_char (p);
		}
		if (p && *p == '\n') {
			/* now we loop forward offset_into_line
			 * characters, or until we hit \n or \0 */

			p = g_utf8_next_char (p);
			while (offset_into_line > 0 && p && *p != '\n' && *p != '\0') {
				p = g_utf8_next_char (p);
				offset_into_line--;
			}
		}

		/* at this point, p points to the new location,
		 * convert it to an offset and we're done */
		new_pos = g_utf8_pointer_to_offset (text->text, p);
		break;
	}
	case E_TEP_BACKWARD_LINE: {
		gint offset_into_line;

		offset_into_line = find_offset_into_line (
			text, text->selection_end, &p);

		if (offset_into_line == -1)
			return text->selection_end;

		/* p points to the first character on our line.  if we
		 * have a \n before it, skip it and scan til we hit
		 * the next one */
		if (p != text->text) {
			p = g_utf8_find_prev_char (text->text, p);
			if (*p == '\n') {
				p = g_utf8_find_prev_char (text->text, p);
				while (p > text->text) {
					if (*p == '\n') {
						p++;
						break;
					}
					p = g_utf8_find_prev_char (text->text, p);
				}
			}
		}

		/* at this point 'p' points to the start of the
		 * previous line, move forward 'offset_into_line'
		 * times. */

		while (offset_into_line > 0 && p && *p != '\n' && *p != '\0') {
			p = g_utf8_next_char (p);
			offset_into_line--;
		}

		/* at this point, p points to the new location,
		 * convert it to an offset and we're done */
		new_pos = g_utf8_pointer_to_offset (text->text, p);
		break;
	}
	case E_TEP_SELECT_WORD:
		/* This is a silly hack to cause double-clicking on an object
		 * to activate that object.
		 * (Normally, double click == select word, which is why this is here.) */

		obj_num = e_text_model_get_object_at_offset (
			text->model, text->selection_start);
		if (obj_num != -1) {
			e_text_model_activate_nth_object (text->model, obj_num);
			new_pos = text->selection_start;
			break;
		}

		if (text->selection_end < 1) {
			new_pos = 0;
			break;
		}

		p = g_utf8_offset_to_pointer (text->text, text->selection_end);

		p = g_utf8_find_prev_char (text->text, p);

		while (p && p > text->text) {
			unival = g_utf8_get_char (p);
			if (g_unichar_isspace (unival)) {
				p = g_utf8_next_char (p);
				break;
			}
			p = g_utf8_find_prev_char (text->text, p);
		}

		if (!p)
			text->selection_start = 0;
		else
			text->selection_start = g_utf8_pointer_to_offset (text->text, p);

		text->selection_start =
			e_text_model_validate_position (
			text->model, text->selection_start);

		length = g_utf8_strlen (text->text, -1);
		if (text->selection_end >= length) {
			new_pos = length;
			break;
		}

		p = g_utf8_offset_to_pointer (text->text, text->selection_end);
		while (p && *p) {
			unival = g_utf8_get_char (p);
			if (g_unichar_isspace (unival)) {
				new_pos = g_utf8_pointer_to_offset (text->text, p);
				break;
			} else
				p = g_utf8_next_char (p);
		}

		if (!new_pos)
			new_pos = g_utf8_strlen (text->text, -1);

		return new_pos;

	case E_TEP_SELECT_ALL:
		text->selection_start = 0;
		new_pos = g_utf8_strlen (text->text, -1);
		break;

	case E_TEP_FORWARD_PARAGRAPH:
	case E_TEP_BACKWARD_PARAGRAPH:

	case E_TEP_FORWARD_PAGE:
	case E_TEP_BACKWARD_PAGE:
		new_pos = text->selection_end;
		break;

	default:
		new_pos = text->selection_end;
		break;
	}

	new_pos = e_text_model_validate_position (text->model, new_pos);

	return new_pos;
}

static void
e_text_insert (EText *text,
               const gchar *string)
{
	gint len = strlen (string);

	if (len > 0) {
		gint utf8len = 0;

		if (!text->allow_newlines) {
			const gchar *i;
			gchar *new_string = g_malloc (len + 1);
			gchar *j = new_string;

			for (i = string; *i; i = g_utf8_next_char (i)) {
				if (*i != '\n') {
					gunichar c;
					gint charlen;

					c = g_utf8_get_char (i);
					charlen = g_unichar_to_utf8 (c, j);
					j += charlen;
					utf8len++;
				}
			}
			*j = 0;
			e_text_model_insert_length (
				text->model, text->selection_start,
				new_string, utf8len);
			g_free (new_string);
		}
		else {
			utf8len = g_utf8_strlen (string, -1);
			e_text_model_insert_length (
				text->model, text->selection_start,
				string, utf8len);
		}
	}
}

static void
capitalize (EText *text,
            gint start,
            gint end,
            ETextEventProcessorCaps type)
{
	gboolean first = TRUE;
	const gchar *p = g_utf8_offset_to_pointer (text->text, start);
	const gchar *text_end = g_utf8_offset_to_pointer (text->text, end);
	gint utf8len = text_end - p;

	if (utf8len > 0) {
		gchar *new_text = g_new0 (char, utf8len * 6);
		gchar *output = new_text;

		while (p && *p && p < text_end) {
			gunichar unival = g_utf8_get_char (p);
			gunichar newval = unival;

			switch (type) {
			case E_TEP_CAPS_UPPER:
				newval = g_unichar_toupper (unival);
				break;
			case E_TEP_CAPS_LOWER:
				newval = g_unichar_tolower (unival);
				break;
			case E_TEP_CAPS_TITLE:
				if (g_unichar_isalpha (unival)) {
					if (first)
						newval = g_unichar_totitle (unival);
					else
						newval = g_unichar_tolower (unival);
					first = FALSE;
				} else {
					first = TRUE;
				}
				break;
			}
			g_unichar_to_utf8 (newval, output);
			output = g_utf8_next_char (output);

			p = g_utf8_next_char (p);
		}
		*output = 0;

		e_text_model_delete (text->model, start, utf8len);
		e_text_model_insert_length (text->model, start, new_text, utf8len);
		g_free (new_text);
	}
}

static void
e_text_command (ETextEventProcessor *tep,
                ETextEventProcessorCommand *command,
                gpointer data)
{
	EText *text = E_TEXT (data);
	gboolean scroll = TRUE;
	gboolean use_start = TRUE;

	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);
		}

		text->need_im_reset = TRUE;
		use_start = TRUE;
		break;
	case E_TEP_SELECT:
		text->selection_start =
			e_text_model_validate_position (
			text->model, text->selection_start); /* paranoia */
		text->selection_end = _get_position (text, command);

		e_text_update_primary_selection (text);

		text->need_im_reset = TRUE;
		use_start = FALSE;

		break;
	case E_TEP_DELETE:
		if (text->selection_end == text->selection_start) {
			text->selection_end = _get_position (text, command);
		}
		e_text_delete_selection (text);
		if (text->timer) {
			g_timer_reset (text->timer);
		}

		text->need_im_reset = TRUE;
		use_start = FALSE;

		break;

	case E_TEP_INSERT:
		if (g_utf8_validate (command->string, command->value, NULL)) {
			if (text->selection_end != text->selection_start) {
				e_text_delete_selection (text);
			}
			e_text_insert (text, command->string);
			if (text->timer) {
				g_timer_reset (text->timer);
			}
			text->need_im_reset = TRUE;
		}
		break;
	case E_TEP_COPY:
		e_text_copy_clipboard (text);

		if (text->timer) {
			g_timer_reset (text->timer);
		}
		scroll = FALSE;
		break;
	case E_TEP_PASTE:
		e_text_paste (text, GDK_NONE);
		if (text->timer) {
			g_timer_reset (text->timer);
		}
		text->need_im_reset = TRUE;
		break;
	case E_TEP_GET_SELECTION:
		e_text_paste (text, GDK_SELECTION_PRIMARY);
		break;
	case E_TEP_ACTIVATE:
		g_signal_emit (text, e_text_signals[E_TEXT_ACTIVATE], 0);
		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:
		e_canvas_item_grab (
			E_CANVAS (GNOME_CANVAS_ITEM (text)->canvas),
			GNOME_CANVAS_ITEM (text),
			GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK,
			text->i_cursor,
			command->device,
			command->time,
			NULL,
			NULL);
		scroll = FALSE;
		break;
	case E_TEP_UNGRAB:
		e_canvas_item_ungrab (
			E_CANVAS (GNOME_CANVAS_ITEM (text)->canvas),
			GNOME_CANVAS_ITEM (text),
			command->time);
		scroll = FALSE;
		break;
	case E_TEP_CAPS:
		if (text->selection_start == text->selection_end) {
			capitalize (
				text, text->selection_start,
				next_word (text, text->selection_start),
				command->value);
		} else {
			gint selection_start = MIN (
				text->selection_start, text->selection_end);
			gint selection_end = MAX (
				text->selection_start, text->selection_end);
			capitalize (
				text, selection_start,
				selection_end, command->value);
		}
		break;
	case E_TEP_NOP:
		scroll = FALSE;
		break;
	}

	e_text_reset_im_context (text);

	/* it's possible to get here without ever having been realized
	 * by our canvas (if the e-text started completely obscured.)
	 * so let's create our layout object if we don't already have
	 * one. */
	if (!text->layout)
		create_layout (text);

	/* We move cursor only if scroll is TRUE */
	if (scroll && !text->button_down) {
		/* XXX do we really need the @trailing logic here?  if
		 * we don't we can scrap the loop and just use
		 * pango_layout_index_to_pos */
		PangoLayoutLine *cur_line = NULL;
		gint selection_index;
		PangoLayoutIter *iter = pango_layout_get_iter (text->layout);

		/* check if we are using selection_start or selection_end for moving? */
		selection_index = use_start ? text->selection_start : text->selection_end;

		/* convert to a byte index */
		selection_index = g_utf8_offset_to_pointer (
			text->text, selection_index) - text->text;

		do {
			PangoLayoutLine *line = pango_layout_iter_get_line (iter);

			if (selection_index >= line->start_index &&
				selection_index <= line->start_index + line->length) {
				/* found the line with the start of the selection */
				cur_line = line;
				break;
			}

		} while (pango_layout_iter_next_line (iter));

		if (cur_line) {
			gint xpos, ypos;
			gdouble clip_width, clip_height;
			/* gboolean trailing = FALSE; */
			PangoRectangle pango_pos;

			if (selection_index > 0 && selection_index ==
				cur_line->start_index + cur_line->length) {
				selection_index--;
				/* trailing = TRUE; */
			}

			pango_layout_index_to_pos (text->layout, selection_index, &pango_pos);

			pango_pos.x = PANGO_PIXELS (pango_pos.x);
			pango_pos.y = PANGO_PIXELS (pango_pos.y);
			pango_pos.width = (pango_pos.width + PANGO_SCALE / 2) / PANGO_SCALE;
			pango_pos.height = (pango_pos.height + PANGO_SCALE / 2) / PANGO_SCALE;

			/* scroll for X */
			xpos = pango_pos.x; /* + (trailing ? 0 : pango_pos.width);*/

			if (xpos + 2 < text->xofs_edit) {
				text->xofs_edit = xpos;
			}

			clip_width = text->clip_width;

			if (xpos + pango_pos.width - clip_width > text->xofs_edit) {
				text->xofs_edit = xpos + pango_pos.width - clip_width;
			}

			/* scroll for Y */
			if (pango_pos.y + 2 < text->yofs_edit) {
				ypos = pango_pos.y;
				text->yofs_edit = ypos;
			}
			else {
				ypos = pango_pos.y + pango_pos.height;
			}

			if (text->clip_height < 0)
				clip_height = text->height;
			else
				clip_height = text->clip_height;

			if (ypos - clip_height > text->yofs_edit) {
				text->yofs_edit = ypos - clip_height;
			}

		}

		pango_layout_iter_free (iter);
	}

	text->needs_redraw = 1;
	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (text));
}

/* Class initialization function for the text item */
static void
e_text_class_init (ETextClass *class)
{
	GObjectClass *gobject_class;
	GnomeCanvasItemClass *item_class;

	gobject_class = (GObjectClass *) class;
	item_class = (GnomeCanvasItemClass *) class;

	gobject_class->dispose = e_text_dispose;
	gobject_class->set_property = e_text_set_property;
	gobject_class->get_property = e_text_get_property;

	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->event = e_text_event;

	class->changed = NULL;
	class->activate = NULL;

	e_text_signals[E_TEXT_CHANGED] = g_signal_new (
		"changed",
		G_OBJECT_CLASS_TYPE (gobject_class),
		G_SIGNAL_RUN_LAST,
		G_STRUCT_OFFSET (ETextClass, changed),
		NULL, NULL,
		g_cclosure_marshal_VOID__VOID,
		G_TYPE_NONE, 0);

	e_text_signals[E_TEXT_ACTIVATE] = g_signal_new (
		"activate",
		G_OBJECT_CLASS_TYPE (gobject_class),
		G_SIGNAL_RUN_LAST,
		G_STRUCT_OFFSET (ETextClass, activate),
		NULL, NULL,
		g_cclosure_marshal_VOID__VOID,
		G_TYPE_NONE, 0);

	e_text_signals[E_TEXT_KEYPRESS] = g_signal_new (
		"keypress",
		G_OBJECT_CLASS_TYPE (gobject_class),
		G_SIGNAL_RUN_LAST,
		G_STRUCT_OFFSET (ETextClass, keypress),
		NULL, NULL,
		e_marshal_NONE__INT_INT,
		G_TYPE_NONE, 2,
		G_TYPE_UINT,
		G_TYPE_UINT);

	e_text_signals[E_TEXT_POPULATE_POPUP] = g_signal_new (
		"populate_popup",
		G_OBJECT_CLASS_TYPE (gobject_class),
		G_SIGNAL_RUN_LAST,
		G_STRUCT_OFFSET (ETextClass, populate_popup),
		NULL, NULL,
		e_marshal_NONE__POINTER_INT_OBJECT,
		G_TYPE_NONE, 3,
		G_TYPE_POINTER,
		G_TYPE_INT,
		GTK_TYPE_MENU);

	g_object_class_install_property (
		gobject_class,
		PROP_MODEL,
		g_param_spec_object (
			"model",
			"Model",
			"Model",
			E_TYPE_TEXT_MODEL,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_EVENT_PROCESSOR,
		g_param_spec_object (
			"event_processor",
			"Event Processor",
			"Event Processor",
			E_TYPE_TEXT_EVENT_PROCESSOR,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_TEXT,
		g_param_spec_string (
			"text",
			"Text",
			"Text",
			NULL,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_BOLD,
		g_param_spec_boolean (
			"bold",
			"Bold",
			"Bold",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_STRIKEOUT,
		g_param_spec_boolean (
			"strikeout",
			"Strikeout",
			"Strikeout",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_ITALIC,
		g_param_spec_boolean (
			"italic",
			"Italic",
			"Italic",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_JUSTIFICATION,
		g_param_spec_enum (
			"justification",
			"Justification",
			"Justification",
			GTK_TYPE_JUSTIFICATION,
			GTK_JUSTIFY_LEFT,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_CLIP_WIDTH,
		g_param_spec_double (
			"clip_width",
			"Clip Width",
			"Clip Width",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_CLIP_HEIGHT,
		g_param_spec_double (
			"clip_height",
			"Clip Height",
			"Clip Height",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_CLIP,
		g_param_spec_boolean (
			"clip",
			"Clip",
			"Clip",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_FILL_CLIP_RECTANGLE,
		g_param_spec_boolean (
			"fill_clip_rectangle",
			"Fill clip rectangle",
			"Fill clip rectangle",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_X_OFFSET,
		g_param_spec_double (
			"x_offset",
			"X Offset",
			"X Offset",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_Y_OFFSET,
		g_param_spec_double (
			"y_offset",
			"Y Offset",
			"Y Offset",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_FILL_COLOR,
		g_param_spec_string (
			"fill_color",
			"Fill color",
			"Fill color",
			NULL,
			G_PARAM_WRITABLE));

	g_object_class_install_property (
		gobject_class,
		PROP_FILL_COLOR_GDK,
		g_param_spec_boxed (
			"fill_color_gdk",
			"GDK fill color",
			"GDK fill color",
			GDK_TYPE_COLOR,
			G_PARAM_WRITABLE));

	g_object_class_install_property (
		gobject_class,
		PROP_FILL_COLOR_RGBA,
		g_param_spec_uint (
			"fill_color_rgba",
			"GDK fill color",
			"GDK fill color",
			0, G_MAXUINT, 0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_TEXT_WIDTH,
		g_param_spec_double (
			"text_width",
			"Text width",
			"Text width",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READABLE));

	g_object_class_install_property (
		gobject_class,
		PROP_TEXT_HEIGHT,
		g_param_spec_double (
			"text_height",
			"Text height",
			"Text height",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READABLE));

	g_object_class_install_property (
		gobject_class,
		PROP_EDITABLE,
		g_param_spec_boolean (
			"editable",
			"Editable",
			"Editable",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_USE_ELLIPSIS,
		g_param_spec_boolean (
			"use_ellipsis",
			"Use ellipsis",
			"Use ellipsis",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_ELLIPSIS,
		g_param_spec_string (
			"ellipsis",
			"Ellipsis",
			"Ellipsis",
			NULL,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_LINE_WRAP,
		g_param_spec_boolean (
			"line_wrap",
			"Line wrap",
			"Line wrap",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_BREAK_CHARACTERS,
		g_param_spec_string (
			"break_characters",
			"Break characters",
			"Break characters",
			NULL,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class, PROP_MAX_LINES,
		g_param_spec_int (
			"max_lines",
			"Max lines",
			"Max lines",
			0, G_MAXINT, 0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_WIDTH,
		g_param_spec_double (
			"width",
			"Width",
			"Width",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_HEIGHT,
		g_param_spec_double (
			"height",
			"Height",
			"Height",
			0.0, G_MAXDOUBLE, 0.0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_ALLOW_NEWLINES,
		g_param_spec_boolean (
			"allow_newlines",
			"Allow newlines",
			"Allow newlines",
			FALSE,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_CURSOR_POS,
		g_param_spec_int (
			"cursor_pos",
			"Cursor position",
			"Cursor position",
			0, G_MAXINT, 0,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_IM_CONTEXT,
		g_param_spec_object (
			"im_context",
			"IM Context",
			"IM Context",
			GTK_TYPE_IM_CONTEXT,
			G_PARAM_READWRITE));

	g_object_class_install_property (
		gobject_class,
		PROP_HANDLE_POPUP,
		g_param_spec_boolean (
			"handle_popup",
			"Handle Popup",
			"Handle Popup",
			FALSE,
			G_PARAM_READWRITE));

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

	gal_a11y_e_text_init ();
}

/* Object initialization function for the text item */
static void
e_text_init (EText *text)
{
	text->model = e_text_model_new ();
	text->text = e_text_model_get_text (text->model);
	text->preedit_len = 0;
	text->preedit_pos = 0;
	text->layout = NULL;

	text->revert = NULL;

	text->model_changed_signal_id = g_signal_connect (
		text->model, "changed",
		G_CALLBACK (e_text_text_model_changed), text);

	text->model_repos_signal_id = g_signal_connect (
		text->model, "reposition",
		G_CALLBACK (e_text_text_model_reposition), text);

	text->justification = GTK_JUSTIFY_LEFT;
	text->clip_width = -1.0;
	text->clip_height = -1.0;
	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->yofs_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->tep_command_id = 0;

	text->pointer_in = FALSE;
	text->default_cursor_shown = TRUE;
	text->line_wrap = FALSE;
	text->break_characters = NULL;
	text->max_lines = -1;
	text->dbl_timeout = 0;
	text->tpl_timeout = 0;

	text->bold = FALSE;
	text->strikeout = FALSE;
	text->italic = FALSE;

	text->allow_newlines = TRUE;

	text->last_type_request = -1;
	text->last_time_request = 0;
	text->queued_requests = NULL;

	text->im_context = NULL;
	text->need_im_reset = FALSE;
	text->im_context_signals_registered = FALSE;

	text->handle_popup = FALSE;
	text->rgba_set = FALSE;

	e_canvas_item_set_reflow_callback (GNOME_CANVAS_ITEM (text), e_text_reflow);
}

/* IM Context Callbacks */
static void
e_text_commit_cb (GtkIMContext *context,
                  const gchar *str,
                  EText *text)
{
	if (g_utf8_validate (str, strlen (str), NULL)) {
		if (text->selection_end != text->selection_start)
			e_text_delete_selection (text);
		e_text_insert (text, str);
		g_signal_emit (text, e_text_signals[E_TEXT_KEYPRESS], 0, 0, 0);
	}
}

static void
e_text_preedit_changed_cb (GtkIMContext *context,
                           EText *etext)
{
	gchar *preedit_string = NULL;
	gint cursor_pos;

	gtk_im_context_get_preedit_string (
		context, &preedit_string,
		NULL, &cursor_pos);

	cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (preedit_string, -1));
	etext->preedit_len = strlen (preedit_string);
	etext->preedit_pos = g_utf8_offset_to_pointer (
		preedit_string, cursor_pos) - preedit_string;
	g_free (preedit_string);

	g_signal_emit (etext, e_text_signals[E_TEXT_KEYPRESS], 0, 0, 0);
}

static gboolean
e_text_retrieve_surrounding_cb (GtkIMContext *context,
                                EText *text)
{
	gtk_im_context_set_surrounding (
		context, text->text, strlen (text->text),
		g_utf8_offset_to_pointer (text->text, MIN (
		text->selection_start, text->selection_end)) - text->text);

	return TRUE;
}

static gboolean
e_text_delete_surrounding_cb (GtkIMContext *context,
                              gint offset,
                              gint n_chars,
                              EText *text)
{
	e_text_model_delete (
		text->model,
		MIN (text->selection_start, text->selection_end) + offset,
		n_chars);

	return TRUE;
}
