/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* Nautilus - Canvas item class for canvas container.
 *
 * Copyright (C) 2000 Eazel, Inc
 *
 * Author: Andy Hertzfeld <andy@eazel.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <math.h>
#include "nautilus-canvas-item.h"

#include <glib/gi18n.h>

#include "nautilus-file-utilities.h"
#include "nautilus-global-preferences.h"
#include "nautilus-canvas-private.h"
#include <eel/eel-art-extensions.h>
#include <eel/eel-gdk-extensions.h>
#include <eel/eel-glib-extensions.h>
#include <eel/eel-graphic-effects.h>
#include <eel/eel-string.h>
#include <eel/eel-accessibility.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <glib/gi18n.h>
#include <atk/atkimage.h>
#include <atk/atkcomponent.h>
#include <atk/atknoopobject.h>
#include <stdio.h>
#include <string.h>

/* gap between bottom of icon and start of text box */
#define LABEL_OFFSET 1
#define LABEL_LINE_SPACING 0

/* Text padding */
#define TEXT_BACK_PADDING_X 4
#define TEXT_BACK_PADDING_Y 1

/* Width of the label with the standard icon size NAUTILUS_CANVAS_ICON_SIZE_STANDARD.
 * It will adapt to other sizes keeping the same space.*/
#define MAX_TEXT_WIDTH_STANDARD (134 - 2 * TEXT_BACK_PADDING_X)

/* special text height handling
 * each item has three text height variables:
 *  + text_height: actual height of the displayed (i.e. on-screen) PangoLayout.
 *  + text_height_for_layout: height used in canvas grid layout algorithms.
 *       		      “sane amount” of text.
 *   “sane amount“ as of
 *      + hard-coded to three lines in text-below-icon mode.
 *
 *  This layout height is used by grid layout algorithms, even
 *  though the actually displayed and/or requested text size may be larger
 *  and overlap adjacent icons, if an icon is selected.
 *
 *  + text_height_for_entire_text: height needed to display the entire PangoLayout,
 *    if it wasn't ellipsized.
 */

/* Private part of the NautilusCanvasItem structure. */
struct NautilusCanvasItemDetails {
	/* The image, text, font. */
	double x, y;
	GdkPixbuf *pixbuf;
	cairo_surface_t *rendered_surface;
	char *editable_text;		/* Text that can be modified by a renaming function */
	char *additional_text;		/* Text that cannot be modifed, such as file size, etc. */
	
	/* Size of the text at current font. */
	int text_dx;
	int text_width;

	/* actual size required for rendering the text to display */
	int text_height;
	/* actual size that would be required for rendering the entire text if it wasn't ellipsized */
	int text_height_for_entire_text;
	/* actual size needed for rendering a “sane amount” of text */
	int text_height_for_layout;

	int editable_text_height;

	/* whether the entire text must always be visible. In that case,
	 * text_height_for_layout will always be equal to text_height.
	 * Used for the last line of a line-wise icon layout. */
	guint entire_text : 1;

    	/* Highlight state. */
   	guint is_highlighted_for_selection : 1;
	guint is_highlighted_as_keyboard_focus: 1;
   	guint is_highlighted_for_drop : 1;
	guint is_highlighted_for_clipboard : 1;
	guint show_stretch_handles : 1;
	guint is_prelit : 1;

	guint rendered_is_highlighted_for_selection : 1;
	guint rendered_is_highlighted_for_drop : 1;
	guint rendered_is_highlighted_for_clipboard : 1;
	guint rendered_is_prelit : 1;
	guint rendered_is_focused : 1;
	
	guint bounds_cached : 1;
	
	guint is_visible : 1;

	/* Cached PangoLayouts. Only used if the icon is visible */
	PangoLayout *editable_text_layout;
	PangoLayout *additional_text_layout;

	/* Cached rectangle in canvas coordinates */
	EelIRect icon_rect;
	EelIRect text_rect;

	EelIRect bounds_cache;
	EelIRect bounds_cache_for_layout;
	EelIRect bounds_cache_for_entire_item;

	GdkWindow *cursor_window;

	/* Accessibility bits */
	GailTextUtil *text_util;
};

/* Object argument IDs. */
enum {
	PROP_0,
	PROP_EDITABLE_TEXT,
	PROP_ADDITIONAL_TEXT,
    	PROP_HIGHLIGHTED_FOR_SELECTION,
    	PROP_HIGHLIGHTED_AS_KEYBOARD_FOCUS,
    	PROP_HIGHLIGHTED_FOR_DROP,
	PROP_HIGHLIGHTED_FOR_CLIPBOARD
};

typedef enum {
	RIGHT_SIDE,
	BOTTOM_SIDE,
	LEFT_SIDE,
	TOP_SIDE
} RectangleSide;

static void nautilus_canvas_item_text_interface_init (EelAccessibleTextIface *iface);
static GType nautilus_canvas_item_accessible_factory_get_type (void);

G_DEFINE_TYPE_WITH_CODE (NautilusCanvasItem, nautilus_canvas_item, EEL_TYPE_CANVAS_ITEM,
			 G_IMPLEMENT_INTERFACE (EEL_TYPE_ACCESSIBLE_TEXT,
						nautilus_canvas_item_text_interface_init));

/* private */
static void     get_icon_rectangle            (NautilusCanvasItem        *item,
						 EelIRect                      *rect);
static void     draw_pixbuf                          (GdkPixbuf                     *pixbuf,
						      cairo_t                       *cr,
						      int                            x,
						      int                            y);
static PangoLayout *get_label_layout                 (PangoLayout                  **layout,
						      NautilusCanvasItem        *item,
						      const char                    *text);
static gboolean hit_test_stretch_handle              (NautilusCanvasItem        *item,
						      EelIRect                       icon_rect,
						      GtkCornerType *corner);
;

static void       nautilus_canvas_item_ensure_bounds_up_to_date (NautilusCanvasItem *canvas_item);

/* Object initialization function for the canvas item. */
static void
nautilus_canvas_item_init (NautilusCanvasItem *canvas_item)
{
	canvas_item->details = G_TYPE_INSTANCE_GET_PRIVATE ((canvas_item), NAUTILUS_TYPE_CANVAS_ITEM, NautilusCanvasItemDetails);
	nautilus_canvas_item_invalidate_label_size (canvas_item);
}

static void
nautilus_canvas_item_finalize (GObject *object)
{
	NautilusCanvasItemDetails *details;

	g_assert (NAUTILUS_IS_CANVAS_ITEM (object));

	details = NAUTILUS_CANVAS_ITEM (object)->details;

	if (details->cursor_window != NULL) {
		gdk_window_set_cursor (details->cursor_window, NULL);
		g_object_unref (details->cursor_window);
	}

	if (details->pixbuf != NULL) {
		g_object_unref (details->pixbuf);
	}
	
	if (details->text_util != NULL) {
		g_object_unref (details->text_util);
	}

	g_free (details->editable_text);
	g_free (details->additional_text);

	if (details->rendered_surface != NULL) {
		cairo_surface_destroy (details->rendered_surface);
	}

	if (details->editable_text_layout != NULL) {
		g_object_unref (details->editable_text_layout);
	}

	if (details->additional_text_layout != NULL) {
		g_object_unref (details->additional_text_layout);
	}

	G_OBJECT_CLASS (nautilus_canvas_item_parent_class)->finalize (object);
}
 
/* Currently we require pixbufs in this format (for hit testing).
 * Perhaps gdk-pixbuf will be changed so it can do the hit testing
 * and we won't have this requirement any more.
 */
static gboolean
pixbuf_is_acceptable (GdkPixbuf *pixbuf)
{
	return gdk_pixbuf_get_colorspace (pixbuf) == GDK_COLORSPACE_RGB
		&& ((!gdk_pixbuf_get_has_alpha (pixbuf)
		     && gdk_pixbuf_get_n_channels (pixbuf) == 3)
		    || (gdk_pixbuf_get_has_alpha (pixbuf)
			&& gdk_pixbuf_get_n_channels (pixbuf) == 4))
		&& gdk_pixbuf_get_bits_per_sample (pixbuf) == 8;
}

static void
nautilus_canvas_item_invalidate_bounds_cache (NautilusCanvasItem *item)
{
	item->details->bounds_cached = FALSE;
}

/* invalidate the text width and height cached in the item details. */
void
nautilus_canvas_item_invalidate_label_size (NautilusCanvasItem *item)
{
	if (item->details->editable_text_layout != NULL) {
		pango_layout_context_changed (item->details->editable_text_layout);
	}
	if (item->details->additional_text_layout != NULL) {
		pango_layout_context_changed (item->details->additional_text_layout);
	}
	nautilus_canvas_item_invalidate_bounds_cache (item);
	item->details->text_width = -1;
	item->details->text_height = -1;
	item->details->text_height_for_layout = -1;
	item->details->text_height_for_entire_text = -1;
	item->details->editable_text_height = -1;
}

/* Set property handler for the canvas item. */
static void
nautilus_canvas_item_set_property (GObject        *object,
				   guint           property_id,
				   const GValue   *value,
				   GParamSpec     *pspec)
{
	NautilusCanvasItem *item;
	NautilusCanvasItemDetails *details;
	AtkObject *accessible;

	item = NAUTILUS_CANVAS_ITEM (object);
	accessible = atk_gobject_accessible_for_object (G_OBJECT (item));
	details = item->details;

	switch (property_id) {

	case PROP_EDITABLE_TEXT:
		if (g_strcmp0 (details->editable_text,
			       g_value_get_string (value)) == 0) {
			return;
		}

		g_free (details->editable_text);
		details->editable_text = g_strdup (g_value_get_string (value));
		if (details->text_util) {
			gail_text_util_text_setup (details->text_util,
						   details->editable_text);
			g_object_notify (G_OBJECT(accessible), "accessible-name");
		}
		
		nautilus_canvas_item_invalidate_label_size (item);
		if (details->editable_text_layout) {
			g_object_unref (details->editable_text_layout);
			details->editable_text_layout = NULL;
		}
		break;

	case PROP_ADDITIONAL_TEXT:
		if (g_strcmp0 (details->additional_text,
			       g_value_get_string (value)) == 0) {
			return;
		}

		g_free (details->additional_text);
		details->additional_text = g_strdup (g_value_get_string (value));
		
		nautilus_canvas_item_invalidate_label_size (item);		
		if (details->additional_text_layout) {
			g_object_unref (details->additional_text_layout);
			details->additional_text_layout = NULL;
		}
		break;

	case PROP_HIGHLIGHTED_FOR_SELECTION:
		if (!details->is_highlighted_for_selection == !g_value_get_boolean (value)) {
			return;
		}
		details->is_highlighted_for_selection = g_value_get_boolean (value);
		nautilus_canvas_item_invalidate_label_size (item);

		atk_object_notify_state_change (accessible, ATK_STATE_SELECTED,
						details->is_highlighted_for_selection);

		break;
         
        case PROP_HIGHLIGHTED_AS_KEYBOARD_FOCUS:
		if (!details->is_highlighted_as_keyboard_focus == !g_value_get_boolean (value)) {
			return;
		}
		details->is_highlighted_as_keyboard_focus = g_value_get_boolean (value);

		if (details->is_highlighted_as_keyboard_focus) {
			atk_focus_tracker_notify (accessible);
		}
		break;
		
        case PROP_HIGHLIGHTED_FOR_DROP:
		if (!details->is_highlighted_for_drop == !g_value_get_boolean (value)) {
			return;
		}
		details->is_highlighted_for_drop = g_value_get_boolean (value);
		break;

	case PROP_HIGHLIGHTED_FOR_CLIPBOARD:
		if (!details->is_highlighted_for_clipboard == !g_value_get_boolean (value)) {
			return;
		}
		details->is_highlighted_for_clipboard = g_value_get_boolean (value);
		break;

	default:
		g_warning ("nautilus_canvas_item_set_property on unknown argument");
		return;
	}
	
	eel_canvas_item_request_update (EEL_CANVAS_ITEM (object));
}

/* Get property handler for the canvas item */
static void
nautilus_canvas_item_get_property (GObject        *object,
				   guint           property_id,
				   GValue         *value,
				   GParamSpec     *pspec)
{
	NautilusCanvasItemDetails *details;
	
	details = NAUTILUS_CANVAS_ITEM (object)->details;
	
	switch (property_id) {
		
	case PROP_EDITABLE_TEXT:
		g_value_set_string (value, details->editable_text);
		break;

	case PROP_ADDITIONAL_TEXT:
		g_value_set_string (value, details->additional_text);
		break;
		
        case PROP_HIGHLIGHTED_FOR_SELECTION:
		g_value_set_boolean (value, details->is_highlighted_for_selection);
                break;
		
        case PROP_HIGHLIGHTED_AS_KEYBOARD_FOCUS:
		g_value_set_boolean (value, details->is_highlighted_as_keyboard_focus);
                break;
		
        case PROP_HIGHLIGHTED_FOR_DROP:
		g_value_set_boolean (value, details->is_highlighted_for_drop);
                break;

	case PROP_HIGHLIGHTED_FOR_CLIPBOARD:
		g_value_set_boolean (value, details->is_highlighted_for_clipboard);
                break;

        default:
		g_warning ("invalid property %d", property_id);
		break;
	}
}

static void
get_scaled_icon_size (NautilusCanvasItem *item,
		      gint *width,
		      gint *height)
{
	EelCanvas *canvas;
	GdkPixbuf *pixbuf = NULL;
	gint scale;

	if (item != NULL) {
		canvas = EEL_CANVAS_ITEM (item)->canvas;
		scale = gtk_widget_get_scale_factor (GTK_WIDGET (canvas));
		pixbuf = item->details->pixbuf;
	}

	if (width)
		*width = (pixbuf == NULL) ? 0 : (gdk_pixbuf_get_width (pixbuf) / scale);
	if (height)
		*height = (pixbuf == NULL) ? 0 : (gdk_pixbuf_get_height (pixbuf) / scale);
}

void
nautilus_canvas_item_set_image (NautilusCanvasItem *item,
				GdkPixbuf *image)
{
	NautilusCanvasItemDetails *details;	
	
	g_return_if_fail (NAUTILUS_IS_CANVAS_ITEM (item));
	g_return_if_fail (image == NULL || pixbuf_is_acceptable (image));

	details = item->details;	
	if (details->pixbuf == image) {
		return;
	}

	if (image != NULL) {
		g_object_ref (image);
	}
	if (details->pixbuf != NULL) {
		g_object_unref (details->pixbuf);
	}
	if (details->rendered_surface != NULL) {
		cairo_surface_destroy (details->rendered_surface);
		details->rendered_surface = NULL;
	}

	details->pixbuf = image;
			
	nautilus_canvas_item_invalidate_bounds_cache (item);
	eel_canvas_item_request_update (EEL_CANVAS_ITEM (item));	
}

/* Recomputes the bounding box of a canvas item.
 * This is a generic implementation that could be used for any canvas item
 * class, it has no assumptions about how the item is used.
 */
static void
recompute_bounding_box (NautilusCanvasItem *canvas_item,
			double i2w_dx, double i2w_dy)
{
	/* The bounds stored in the item is the same as what get_bounds
	 * returns, except it's in canvas coordinates instead of the item's
	 * parent's coordinates.
	 */

	EelCanvasItem *item;
	EelDRect bounds_rect;

	item = EEL_CANVAS_ITEM (canvas_item);

	eel_canvas_item_get_bounds (item,
				    &bounds_rect.x0, &bounds_rect.y0,
				    &bounds_rect.x1, &bounds_rect.y1);

	bounds_rect.x0 += i2w_dx;
	bounds_rect.y0 += i2w_dy;
	bounds_rect.x1 += i2w_dx;
	bounds_rect.y1 += i2w_dy;
	eel_canvas_w2c_d (item->canvas,
			  bounds_rect.x0, bounds_rect.y0,
			  &item->x1, &item->y1);
	eel_canvas_w2c_d (item->canvas,
			  bounds_rect.x1, bounds_rect.y1,
			  &item->x2, &item->y2);
}

static EelIRect
compute_text_rectangle (const NautilusCanvasItem *item,
			EelIRect icon_rectangle,
			gboolean canvas_coords,
			NautilusCanvasItemBoundsUsage usage)
{
	EelIRect text_rectangle;
	double pixels_per_unit;
	double text_width, text_height, text_height_for_layout, text_height_for_entire_text, real_text_height;

	pixels_per_unit = EEL_CANVAS_ITEM (item)->canvas->pixels_per_unit;
	if (canvas_coords) {
		text_width = item->details->text_width;
		text_height = item->details->text_height;
		text_height_for_layout = item->details->text_height_for_layout;
		text_height_for_entire_text = item->details->text_height_for_entire_text;
	} else {
		text_width = item->details->text_width / pixels_per_unit;
		text_height = item->details->text_height / pixels_per_unit;
		text_height_for_layout = item->details->text_height_for_layout / pixels_per_unit;
		text_height_for_entire_text = item->details->text_height_for_entire_text / pixels_per_unit;
	}

	text_rectangle.x0 = (icon_rectangle.x0 + icon_rectangle.x1) / 2 - (int) text_width / 2;
	text_rectangle.y0 = icon_rectangle.y1;
	text_rectangle.x1 = text_rectangle.x0 + text_width;

	if (usage == BOUNDS_USAGE_FOR_LAYOUT) {
		real_text_height = text_height_for_layout;
	} else if (usage == BOUNDS_USAGE_FOR_ENTIRE_ITEM) {
		real_text_height = text_height_for_entire_text;
	} else if (usage == BOUNDS_USAGE_FOR_DISPLAY) {
		real_text_height = text_height;
	} else {
		g_assert_not_reached ();
	}

	text_rectangle.y1 = text_rectangle.y0 + real_text_height + LABEL_OFFSET / pixels_per_unit;

	return text_rectangle;
}

static EelIRect
get_current_canvas_bounds (EelCanvasItem *item)
{
	EelIRect bounds;

	g_assert (EEL_IS_CANVAS_ITEM (item));

	bounds.x0 = item->x1;
	bounds.y0 = item->y1;
	bounds.x1 = item->x2;
	bounds.y1 = item->y2;

	return bounds;
}

void
nautilus_canvas_item_update_bounds (NautilusCanvasItem *item,
				    double i2w_dx, double i2w_dy)
{
	EelIRect before, after;
	EelCanvasItem *canvas_item;

	canvas_item = EEL_CANVAS_ITEM (item);
	
	/* Compute new bounds. */
	before = get_current_canvas_bounds (canvas_item);
	recompute_bounding_box (item, i2w_dx, i2w_dy);
	after = get_current_canvas_bounds (canvas_item);

	/* If the bounds didn't change, we are done. */
	if (eel_irect_equal (before, after)) {
		return;
	}
	
	/* Update canvas and text rect cache */
	get_icon_rectangle (item, &item->details->icon_rect);
	item->details->text_rect = compute_text_rectangle (item, item->details->icon_rect,
							   TRUE, BOUNDS_USAGE_FOR_DISPLAY);

	/* queue a redraw. */
	eel_canvas_request_redraw (canvas_item->canvas,
				   before.x0, before.y0,
				   before.x1 + 1, before.y1 + 1);
}

/* Update handler for the canvas canvas item. */
static void
nautilus_canvas_item_update (EelCanvasItem *item,
			     double i2w_dx, double i2w_dy,
			     gint flags)
{
	nautilus_canvas_item_update_bounds (NAUTILUS_CANVAS_ITEM (item), i2w_dx, i2w_dy);

	eel_canvas_item_request_redraw (EEL_CANVAS_ITEM (item));

	EEL_CANVAS_ITEM_CLASS (nautilus_canvas_item_parent_class)->update (item, i2w_dx, i2w_dy, flags);
}

/* Rendering */
static gboolean
in_single_click_mode (void)
{
	int click_policy;

	click_policy = g_settings_get_enum (nautilus_preferences,
					    NAUTILUS_PREFERENCES_CLICK_POLICY);

	return click_policy == NAUTILUS_CLICK_POLICY_SINGLE;
}


/* Keep these for a bit while we work on performance of draw_or_measure_label_text. */
/*
  #define PERFORMANCE_TEST_DRAW_DISABLE
  #define PERFORMANCE_TEST_MEASURE_DISABLE
*/

/* This gets the size of the layout from the position of the layout.
 * This means that if the layout is right aligned we get the full width
 * of the layout, not just the width of the text snippet on the right side
 */
static void
layout_get_full_size (PangoLayout *layout,
		      int         *width,
		      int         *height,
		      int         *dx)
{
	PangoRectangle logical_rect;
	int the_width, total_width;
	
	pango_layout_get_extents (layout, NULL, &logical_rect);
	the_width = (logical_rect.width + PANGO_SCALE / 2) / PANGO_SCALE;
	total_width = (logical_rect.x + logical_rect.width + PANGO_SCALE / 2) / PANGO_SCALE;

	if (width != NULL) {
		*width = the_width;
	}

	if (height != NULL) {
		*height = (logical_rect.height + PANGO_SCALE / 2) / PANGO_SCALE;
	}

	if (dx != NULL) {
		*dx = total_width - the_width;
	}
}

static void
layout_get_size_for_layout (PangoLayout *layout,
			    int          max_layout_line_count,
			    int          height_for_entire_text,
			    int         *height_for_layout)
{
	PangoLayoutIter *iter;
	PangoRectangle logical_rect;
	int i;

	/* only use the first max_layout_line_count lines for the gridded auto layout */
	if (pango_layout_get_line_count (layout) <= max_layout_line_count) {
		*height_for_layout = height_for_entire_text;
	} else {
		*height_for_layout = 0;
		iter = pango_layout_get_iter (layout);
		for (i = 0; i < max_layout_line_count; i++) {
			pango_layout_iter_get_line_extents (iter, NULL, &logical_rect);
			*height_for_layout += (logical_rect.height + PANGO_SCALE / 2) / PANGO_SCALE;

			if (!pango_layout_iter_next_line (iter)) {
				break;
			}

			*height_for_layout += pango_layout_get_spacing (layout);
		}
		pango_layout_iter_free (iter);
	}
}

static void
prepare_pango_layout_width (NautilusCanvasItem *item,
			    PangoLayout *layout)
{
	pango_layout_set_width (layout, floor (nautilus_canvas_item_get_max_text_width (item)) * PANGO_SCALE);
	pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
}

static void
prepare_pango_layout_for_measure_entire_text (NautilusCanvasItem *item,
					      PangoLayout *layout)
{
	prepare_pango_layout_width (item, layout);
	pango_layout_set_height (layout, G_MININT);
}

static void
prepare_pango_layout_for_draw (NautilusCanvasItem *item,
			       PangoLayout *layout)
{
	NautilusCanvasItemDetails *details;
	NautilusCanvasContainer *container;
	gboolean needs_highlight;

	prepare_pango_layout_width (item, layout);

	container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);
	details = item->details;

	needs_highlight = details->is_highlighted_for_selection || details->is_highlighted_for_drop;

	if (needs_highlight ||
	    details->is_highlighted_as_keyboard_focus ||
	    details->entire_text) {
		/* VOODOO-TODO, cf. compute_text_rectangle() */
		pango_layout_set_height (layout, G_MININT);
	} else {
		/* TODO? we might save some resources, when the re-layout is not neccessary in case
		 * the layout height already fits into max. layout lines. But pango should figure this
		 * out itself (which it doesn't ATM).
		 */
		pango_layout_set_height (layout,
					 nautilus_canvas_container_get_max_layout_lines_for_pango (container));
	}
}

static void
measure_label_text (NautilusCanvasItem *item)
{
	NautilusCanvasItemDetails *details;
	NautilusCanvasContainer *container;
	gint editable_height, editable_height_for_layout, editable_height_for_entire_text, editable_width, editable_dx;
	gint additional_height, additional_width, additional_dx;
	PangoLayout *editable_layout;
	PangoLayout *additional_layout;
	gboolean have_editable, have_additional;

	/* check to see if the cached values are still valid; if so, there's
	 * no work necessary
	 */
	
	if (item->details->text_width >= 0 && item->details->text_height >= 0) {
		return;
	}

	details = item->details;

	have_editable = details->editable_text != NULL && details->editable_text[0] != '\0';
	have_additional = details->additional_text != NULL && details->additional_text[0] != '\0';

	/* No font or no text, then do no work. */
	if (!have_editable && !have_additional) {
		details->text_height = 0;
		details->text_height_for_layout = 0;
		details->text_height_for_entire_text = 0;
		details->text_width = 0;			
		return;
	}

#ifdef PERFORMANCE_TEST_MEASURE_DISABLE
	/* fake out the width */
	details->text_width = 80;
	details->text_height = 20;
	details->text_height_for_layout = 20;
	details->text_height_for_entire_text = 20;
	return;
#endif

	editable_width = 0;
	editable_height = 0;
	editable_height_for_layout = 0;
	editable_height_for_entire_text = 0;
	editable_dx = 0;
	additional_width = 0;
	additional_height = 0;
	additional_dx = 0;

	container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);	
	editable_layout = NULL;
	additional_layout = NULL;

	if (have_editable) {
		/* first, measure required text height: editable_height_for_entire_text
		 * then, measure text height applicable for layout: editable_height_for_layout
		 * next, measure actually displayed height: editable_height
		 */
		editable_layout = get_label_layout (&details->editable_text_layout, item, details->editable_text);

		prepare_pango_layout_for_measure_entire_text (item, editable_layout);
		layout_get_full_size (editable_layout,
				      NULL,
				      &editable_height_for_entire_text,
				      NULL);
		layout_get_size_for_layout (editable_layout,
					    nautilus_canvas_container_get_max_layout_lines (container),
					    editable_height_for_entire_text,
					    &editable_height_for_layout);

		prepare_pango_layout_for_draw (item, editable_layout);
		layout_get_full_size (editable_layout,
				      &editable_width,
				      &editable_height,
				      &editable_dx);
	}

	if (have_additional) {
		additional_layout = get_label_layout (&details->additional_text_layout, item, details->additional_text);
		prepare_pango_layout_for_draw (item, additional_layout);
		layout_get_full_size (additional_layout,
				      &additional_width, &additional_height, &additional_dx);
	}

	details->editable_text_height = editable_height;

	if (editable_width > additional_width) {
		details->text_width = editable_width;
		details->text_dx = editable_dx;
	} else {
		details->text_width = additional_width;
		details->text_dx = additional_dx;
	}

	if (have_additional) {
		details->text_height = editable_height + LABEL_LINE_SPACING + additional_height;
		details->text_height_for_layout = editable_height_for_layout + LABEL_LINE_SPACING + additional_height;
		details->text_height_for_entire_text = editable_height_for_entire_text + LABEL_LINE_SPACING + additional_height;
	} else {
		details->text_height = editable_height;
		details->text_height_for_layout = editable_height_for_layout;
		details->text_height_for_entire_text = editable_height_for_entire_text;
	}

	/* add some extra space for highlighting even when we don't highlight so things won't move */
	
	/* extra slop for nicer highlighting */
	details->text_height += TEXT_BACK_PADDING_Y*2;
	details->text_height_for_layout += TEXT_BACK_PADDING_Y*2;
	details->text_height_for_entire_text += TEXT_BACK_PADDING_Y*2;
	details->editable_text_height += TEXT_BACK_PADDING_Y*2;

	/* extra to make it look nicer */
	details->text_width += TEXT_BACK_PADDING_X*2;

	if (editable_layout) {
		g_object_unref (editable_layout);
	}

	if (additional_layout) {
		g_object_unref (additional_layout);
	}
}

static void
draw_label_text (NautilusCanvasItem *item,
                 cairo_t *cr,
		 EelIRect icon_rect)
{
	NautilusCanvasItemDetails *details;
	NautilusCanvasContainer *container;
	PangoLayout *editable_layout;
	PangoLayout *additional_layout;
	GtkStyleContext *context;
	GtkStateFlags state, base_state;
	gboolean have_editable, have_additional;
	gboolean needs_highlight, prelight_label;
	EelIRect text_rect;
	int x;
	int max_text_width;
	gdouble frame_w, frame_h, frame_x, frame_y;
	gboolean draw_frame = TRUE;

#ifdef PERFORMANCE_TEST_DRAW_DISABLE
	return;
#endif

	details = item->details;

	measure_label_text (item);
	if (details->text_height == 0 ||
	    details->text_width == 0) {
		return;
	}

	container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);
	context = gtk_widget_get_style_context (GTK_WIDGET (container));

	text_rect = compute_text_rectangle (item, icon_rect, TRUE, BOUNDS_USAGE_FOR_DISPLAY);

	needs_highlight = details->is_highlighted_for_selection || details->is_highlighted_for_drop;

	editable_layout = NULL;
	additional_layout = NULL;

	have_editable = details->editable_text != NULL && details->editable_text[0] != '\0';
	have_additional = details->additional_text != NULL && details->additional_text[0] != '\0';
	g_assert (have_editable || have_additional);

	max_text_width = floor (nautilus_canvas_item_get_max_text_width (item));

	base_state = gtk_widget_get_state_flags (GTK_WIDGET (container));
	base_state &= ~(GTK_STATE_FLAG_SELECTED | 
			GTK_STATE_FLAG_PRELIGHT);
	state = base_state;

	gtk_widget_style_get (GTK_WIDGET (container),
			      "activate_prelight_icon_label", &prelight_label,
			      NULL);

	/* if the canvas is highlighted, do some set-up */
	if (needs_highlight) {
		state |= GTK_STATE_FLAG_SELECTED;

		frame_x = text_rect.x0;
		frame_y = text_rect.y0;
		frame_w = text_rect.x1 - text_rect.x0;
		frame_h = text_rect.y1 - text_rect.y0;
	} else if (!needs_highlight && have_editable &&
		   details->text_width > 0 && details->text_height > 0 &&
		   prelight_label && item->details->is_prelit) {
		state |= GTK_STATE_FLAG_PRELIGHT;

		frame_x = text_rect.x0;
		frame_y = text_rect.y0;
		frame_w = text_rect.x1 - text_rect.x0;
		frame_h = text_rect.y1 - text_rect.y0;
	} else {
		draw_frame = FALSE;
	}

	if (draw_frame) {
		gtk_style_context_save (context);
		gtk_style_context_set_state (context, state);

		gtk_render_frame (context, cr,
				  frame_x, frame_y,
				  frame_w, frame_h);
		gtk_render_background (context, cr,
				       frame_x, frame_y,
				       frame_w, frame_h);

		gtk_style_context_restore (context);
	}

	x = text_rect.x0 + ((text_rect.x1 - text_rect.x0) - max_text_width) / 2;

	if (have_editable) {
		state = base_state;

		if (prelight_label && item->details->is_prelit) {
			state |= GTK_STATE_FLAG_PRELIGHT;
		}

		if (needs_highlight) {
			state |= GTK_STATE_FLAG_SELECTED;
		}

		editable_layout = get_label_layout (&item->details->editable_text_layout, item, item->details->editable_text);
		prepare_pango_layout_for_draw (item, editable_layout);

		gtk_style_context_save (context);
		gtk_style_context_set_state (context, state);

		gtk_render_layout (context, cr,
				   x, text_rect.y0 + TEXT_BACK_PADDING_Y,
				   editable_layout);

		gtk_style_context_restore (context);
	}

	if (have_additional) {
		state = base_state;

		if (needs_highlight) {
			state |= GTK_STATE_FLAG_SELECTED;
		}

		additional_layout = get_label_layout (&item->details->additional_text_layout, item, item->details->additional_text);
		prepare_pango_layout_for_draw (item, additional_layout);

		gtk_style_context_save (context);
		gtk_style_context_set_state (context, state);
		gtk_style_context_add_class (context, "dim-label");

		gtk_render_layout (context, cr,
				   x, text_rect.y0 + details->editable_text_height + LABEL_LINE_SPACING + TEXT_BACK_PADDING_Y,
				   additional_layout);

		gtk_style_context_restore (context);
	}

	if (item->details->is_highlighted_as_keyboard_focus) {
		if (needs_highlight) {
			state = GTK_STATE_FLAG_SELECTED;
		}

		gtk_style_context_save (context);
		gtk_style_context_set_state (context, state);
					     
		gtk_render_focus (context,
				  cr,
				  text_rect.x0,
				  text_rect.y0,
				  text_rect.x1 - text_rect.x0,
				  text_rect.y1 - text_rect.y0);

		gtk_style_context_restore (context);
	}

	if (editable_layout != NULL) {
		g_object_unref (editable_layout);
	}
	
	if (additional_layout != NULL) {
		g_object_unref (additional_layout);
	}
}

void
nautilus_canvas_item_set_is_visible (NautilusCanvasItem       *item,
				     gboolean                      visible)
{
	if (item->details->is_visible == visible)
		return;
	
	item->details->is_visible = visible;

	if (!visible) {
		nautilus_canvas_item_invalidate_label (item);
	}
}

void
nautilus_canvas_item_invalidate_label (NautilusCanvasItem     *item)
{
	nautilus_canvas_item_invalidate_label_size (item);

	if (item->details->editable_text_layout) {
		g_object_unref (item->details->editable_text_layout);
		item->details->editable_text_layout = NULL;
	}

	if (item->details->additional_text_layout) {
		g_object_unref (item->details->additional_text_layout);
		item->details->additional_text_layout = NULL;
	}
}

static GdkPixbuf *
get_knob_pixbuf (void)
{
	GdkPixbuf *knob_pixbuf = NULL;
	GInputStream *stream = g_resources_open_stream ("/org/gnome/nautilus/icons/knob.png", 0, NULL);

	if (stream != NULL) {
		knob_pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, NULL);
		g_object_unref (stream);
	}

	return knob_pixbuf;
}

static void
draw_stretch_handles (NautilusCanvasItem *item,
                      cairo_t *cr,
		      const EelIRect *rect)
{
	GtkWidget *widget;
	GdkPixbuf *knob_pixbuf;
	int knob_width, knob_height;
	double dash = { 2.0 };
	GtkStyleContext *style;
	GdkRGBA color;

	if (!item->details->show_stretch_handles) {
		return;
	}

	widget = GTK_WIDGET (EEL_CANVAS_ITEM (item)->canvas);
	style = gtk_widget_get_style_context (widget);

        cairo_save (cr);
	knob_pixbuf = get_knob_pixbuf ();
	knob_width = gdk_pixbuf_get_width (knob_pixbuf);
	knob_height = gdk_pixbuf_get_height (knob_pixbuf);

	/* first draw the box */
	gtk_style_context_get_color (style, GTK_STATE_FLAG_SELECTED, &color);
	gdk_cairo_set_source_rgba (cr, &color);
	cairo_set_dash (cr, &dash, 1, 0);
	cairo_set_line_width (cr, 1.0);
	cairo_rectangle (cr,
			 rect->x0 + 0.5,
			 rect->y0 + 0.5,
			 rect->x1 - rect->x0 - 1,
			 rect->y1 - rect->y0 - 1);
	cairo_stroke (cr);

        cairo_restore (cr);

	/* draw the stretch handles themselves */
	draw_pixbuf (knob_pixbuf, cr, rect->x0, rect->y0);
	draw_pixbuf (knob_pixbuf, cr, rect->x0, rect->y1 - knob_height);
	draw_pixbuf (knob_pixbuf, cr, rect->x1 - knob_width, rect->y0);
	draw_pixbuf (knob_pixbuf, cr, rect->x1 - knob_width, rect->y1 - knob_height);

	g_object_unref (knob_pixbuf);
}

static void
draw_pixbuf (GdkPixbuf *pixbuf,
             cairo_t *cr,
             int x, int y)
{
        cairo_save (cr);
	gdk_cairo_set_source_pixbuf (cr, pixbuf, x, y);
	cairo_paint (cr);
        cairo_restore (cr);
}

/* shared code to highlight or dim the passed-in pixbuf */
static cairo_surface_t *
real_map_surface (NautilusCanvasItem *canvas_item)
{
	EelCanvas *canvas;
	GdkPixbuf *temp_pixbuf, *old_pixbuf;
	GtkStyleContext *style;
	GdkRGBA color;
	cairo_surface_t *surface;
	
	temp_pixbuf = canvas_item->details->pixbuf;
	canvas = EEL_CANVAS_ITEM(canvas_item)->canvas;

	g_object_ref (temp_pixbuf);

	if (canvas_item->details->is_prelit ||
	    canvas_item->details->is_highlighted_for_clipboard) {
		old_pixbuf = temp_pixbuf;

		temp_pixbuf = eel_create_spotlight_pixbuf (temp_pixbuf);
		g_object_unref (old_pixbuf);
	}

	if (canvas_item->details->is_highlighted_for_selection
	    || canvas_item->details->is_highlighted_for_drop) {
		style = gtk_widget_get_style_context (GTK_WIDGET (canvas));

		if (gtk_widget_has_focus (GTK_WIDGET (canvas))) {
			gtk_style_context_get_background_color (style, GTK_STATE_FLAG_SELECTED, &color);
		} else {
			gtk_style_context_get_background_color (style, GTK_STATE_FLAG_ACTIVE, &color);	
		}

		old_pixbuf = temp_pixbuf;
		temp_pixbuf = eel_create_colorized_pixbuf (temp_pixbuf, &color);

		g_object_unref (old_pixbuf);
	}

	surface = gdk_cairo_surface_create_from_pixbuf (temp_pixbuf,
							gtk_widget_get_scale_factor (GTK_WIDGET (canvas)),
							gtk_widget_get_window (GTK_WIDGET (canvas)));
	g_object_unref (temp_pixbuf);

	return surface;
}

static cairo_surface_t *
map_surface (NautilusCanvasItem *canvas_item)
{
	if (!(canvas_item->details->rendered_surface != NULL
	      && canvas_item->details->rendered_is_prelit == canvas_item->details->is_prelit
	      && canvas_item->details->rendered_is_highlighted_for_selection == canvas_item->details->is_highlighted_for_selection
	      && canvas_item->details->rendered_is_highlighted_for_drop == canvas_item->details->is_highlighted_for_drop
	      && canvas_item->details->rendered_is_highlighted_for_clipboard == canvas_item->details->is_highlighted_for_clipboard
	      && (canvas_item->details->is_highlighted_for_selection && canvas_item->details->rendered_is_focused == gtk_widget_has_focus (GTK_WIDGET (EEL_CANVAS_ITEM (canvas_item)->canvas))))) {
		if (canvas_item->details->rendered_surface != NULL) {
			cairo_surface_destroy (canvas_item->details->rendered_surface);
		}
		canvas_item->details->rendered_surface = real_map_surface (canvas_item);
		canvas_item->details->rendered_is_prelit = canvas_item->details->is_prelit;
		canvas_item->details->rendered_is_highlighted_for_selection = canvas_item->details->is_highlighted_for_selection;
		canvas_item->details->rendered_is_highlighted_for_drop = canvas_item->details->is_highlighted_for_drop;
	        canvas_item->details->rendered_is_highlighted_for_clipboard = canvas_item->details->is_highlighted_for_clipboard;
		canvas_item->details->rendered_is_focused = gtk_widget_has_focus (GTK_WIDGET (EEL_CANVAS_ITEM (canvas_item)->canvas));
	}

	cairo_surface_reference (canvas_item->details->rendered_surface);

	return canvas_item->details->rendered_surface;
}

cairo_surface_t *
nautilus_canvas_item_get_drag_surface (NautilusCanvasItem *item)
{
	cairo_surface_t *surface;
	EelCanvas *canvas;
	int width, height;
	int pix_width, pix_height;
	int item_offset_x, item_offset_y;
	EelIRect icon_rect;
	double item_x, item_y;
	cairo_t *cr;
	GtkStyleContext *context;
	cairo_surface_t *drag_surface;

	g_return_val_if_fail (NAUTILUS_IS_CANVAS_ITEM (item), NULL);

	canvas = EEL_CANVAS_ITEM (item)->canvas;
	context = gtk_widget_get_style_context (GTK_WIDGET (canvas));

	gtk_style_context_save (context);
	gtk_style_context_add_class (context, "nautilus-canvas-item");

	/* Assume we're updated so canvas item data is right */

	/* Calculate the offset from the top-left corner of the
	   new image to the item position (where the pixmap is placed) */
	eel_canvas_world_to_window (canvas,
				    item->details->x, item->details->y,
				    &item_x, &item_y);

	item_offset_x = item_x - EEL_CANVAS_ITEM (item)->x1;
	item_offset_y = item_y - EEL_CANVAS_ITEM (item)->y1;

	/* Calculate the width of the item */
	width = EEL_CANVAS_ITEM (item)->x2 - EEL_CANVAS_ITEM (item)->x1;
	height = EEL_CANVAS_ITEM (item)->y2 - EEL_CANVAS_ITEM (item)->y1;

        surface = gdk_window_create_similar_surface (gtk_widget_get_window (GTK_WIDGET (canvas)),
						     CAIRO_CONTENT_COLOR_ALPHA,
						     width, height);
	cr = cairo_create (surface);

	drag_surface = map_surface (item);
	gtk_render_icon_surface (context, cr, drag_surface,
				 item_offset_x, item_offset_y);
	cairo_surface_destroy (drag_surface);

	get_scaled_icon_size (item, &pix_width, &pix_height);

	icon_rect.x0 = item_offset_x;
	icon_rect.y0 = item_offset_y;
	icon_rect.x1 = item_offset_x + pix_width;
	icon_rect.y1 = item_offset_y + pix_height;

	draw_label_text (item, cr, icon_rect);
	cairo_destroy (cr);

	gtk_style_context_restore (context);

	return surface;
}

/* Draw the canvas item for non-anti-aliased mode. */
static void
nautilus_canvas_item_draw (EelCanvasItem *item,
			   cairo_t *cr,
			   cairo_region_t *region)
{
	NautilusCanvasContainer *container;
	NautilusCanvasItem *canvas_item;
	NautilusCanvasItemDetails *details;
	EelIRect icon_rect;
	cairo_surface_t *temp_surface;
	GtkStyleContext *context;

	container = NAUTILUS_CANVAS_CONTAINER (item->canvas);
	canvas_item = NAUTILUS_CANVAS_ITEM (item);
	details = canvas_item->details;

        /* Draw the pixbuf. */
     	if (details->pixbuf == NULL) {
		return;
	}

	context = gtk_widget_get_style_context (GTK_WIDGET (container));
	gtk_style_context_save (context);
	gtk_style_context_add_class (context, "nautilus-canvas-item");

	icon_rect = canvas_item->details->icon_rect;
	temp_surface = map_surface (canvas_item);

	gtk_render_icon_surface (context, cr,
				 temp_surface,
				 icon_rect.x0, icon_rect.y0);
	cairo_surface_destroy (temp_surface);

	/* Draw stretching handles (if necessary). */
	draw_stretch_handles (canvas_item, cr, &icon_rect);
	
	/* Draw the label text. */
	draw_label_text (canvas_item, cr, icon_rect);

	gtk_style_context_restore (context);
}

#define ZERO_WIDTH_SPACE "\xE2\x80\x8B"

#define ZERO_OR_THREE_DIGITS(p)			\
	(!g_ascii_isdigit (*(p)) ||		\
	 (g_ascii_isdigit (*(p+1)) &&		\
	  g_ascii_isdigit (*(p+2))))


static PangoLayout *
create_label_layout (NautilusCanvasItem *item,
		     const char *text)
{
	PangoLayout *layout;
	PangoContext *context;
	PangoFontDescription *desc;
	NautilusCanvasContainer *container;
	EelCanvasItem *canvas_item;
	GString *str;
	char *zeroified_text;
	const char *p;

	canvas_item = EEL_CANVAS_ITEM (item);

	container = NAUTILUS_CANVAS_CONTAINER (canvas_item->canvas);
	context = gtk_widget_get_pango_context (GTK_WIDGET (canvas_item->canvas));
	layout = pango_layout_new (context);
	
	zeroified_text = NULL;

	if (text != NULL) {
		str = g_string_new (NULL);

		for (p = text; *p != '\0'; p++) {
			str = g_string_append_c (str, *p);

			if (*p == '_' || *p == '-' || (*p == '.' && ZERO_OR_THREE_DIGITS (p+1))) {
				/* Ensure that we allow to break after '_' or '.' characters,
				 * if they are not likely to be part of a version information, to
				 * not break wrapping of foobar-0.0.1.
				 * Wrap before IPs and long numbers, though. */
				str = g_string_append (str, ZERO_WIDTH_SPACE);
			}
		}

		zeroified_text = g_string_free (str, FALSE);
	}

	pango_layout_set_text (layout, zeroified_text, -1);
	pango_layout_set_auto_dir (layout, FALSE);
	pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);

	pango_layout_set_spacing (layout, LABEL_LINE_SPACING);
	pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);

	/* Create a font description */
	if (container->details->font) {
		desc = pango_font_description_from_string (container->details->font);
	} else {
		desc = pango_font_description_copy (pango_context_get_font_description (context));
	}
	pango_layout_set_font_description (layout, desc);
	pango_font_description_free (desc);
	g_free (zeroified_text);
	
	return layout;
}

static PangoLayout *
get_label_layout (PangoLayout **layout_cache,
		  NautilusCanvasItem *item,
		  const char *text)
{
	PangoLayout *layout;

	if (*layout_cache != NULL) {
		return g_object_ref (*layout_cache);
	}

	layout = create_label_layout (item, text);

	if (item->details->is_visible) {
		*layout_cache = g_object_ref (layout);
	}
	
	return layout;
}

/* handle events */

static int
nautilus_canvas_item_event (EelCanvasItem *item, GdkEvent *event)
{
	NautilusCanvasItem *canvas_item;
	GdkCursor *cursor;
	GdkWindow *cursor_window;

	canvas_item = NAUTILUS_CANVAS_ITEM (item);
	cursor_window = ((GdkEventAny *)event)->window;

	switch (event->type) {
	case GDK_ENTER_NOTIFY:
		if (!canvas_item->details->is_prelit) {
			canvas_item->details->is_prelit = TRUE;
			nautilus_canvas_item_invalidate_label_size (canvas_item);
			eel_canvas_item_request_update (item);
			eel_canvas_item_send_behind (item,
						     NAUTILUS_CANVAS_CONTAINER (item->canvas)->details->rubberband_info.selection_rectangle);

			/* show a hand cursor */
			if (in_single_click_mode ()) {
				cursor = gdk_cursor_new_for_display (gdk_display_get_default(),
								     GDK_HAND2);
				gdk_window_set_cursor (cursor_window, cursor);
				g_object_unref (cursor);

				canvas_item->details->cursor_window = g_object_ref (cursor_window);
			}
		}
		return TRUE;
		
	case GDK_LEAVE_NOTIFY:
		if (canvas_item->details->is_prelit 
		    || canvas_item->details->is_highlighted_for_drop) {
			/* When leaving, turn of the prelight state and the
			 * higlighted for drop. The latter gets turned on
			 * by the drag&drop motion callback.
			 */
			canvas_item->details->is_prelit = FALSE;
			canvas_item->details->is_highlighted_for_drop = FALSE;
			nautilus_canvas_item_invalidate_label_size (canvas_item);
			eel_canvas_item_request_update (item);

			/* show default cursor */
			gdk_window_set_cursor (cursor_window, NULL);
			g_clear_object (&canvas_item->details->cursor_window);
		}
		return TRUE;
		
	default:
		/* Don't eat up other events; canvas container might use them. */
		return FALSE;
	}
}

static gboolean
hit_test (NautilusCanvasItem *canvas_item, EelIRect icon_rect)
{
	NautilusCanvasItemDetails *details;
	
	details = canvas_item->details;
	
	/* Quick check to see if the rect hits the canvas or text at all. */
	if (!eel_irect_hits_irect (canvas_item->details->icon_rect, icon_rect)
	    && (!eel_irect_hits_irect (details->text_rect, icon_rect))) {
		return FALSE;
	}

	/* Check for hits in the stretch handles. */
	if (hit_test_stretch_handle (canvas_item, icon_rect, NULL)) {
		return TRUE;
	}
	
	/* Check for hit in the canvas. */
	if (eel_irect_hits_irect (canvas_item->details->icon_rect, icon_rect)) {
		return TRUE;
	}

	/* Check for hit in the text. */
	if (eel_irect_hits_irect (details->text_rect, icon_rect)) {
		return TRUE;
	}
	
	return FALSE;
}

/* Point handler for the canvas canvas item. */
static double
nautilus_canvas_item_point (EelCanvasItem *item, double x, double y, int cx, int cy,
			    EelCanvasItem **actual_item)
{
	EelIRect icon_rect;

	*actual_item = item;
	icon_rect.x0 = cx;
	icon_rect.y0 = cy;
	icon_rect.x1 = cx + 1;
	icon_rect.y1 = cy + 1;
	if (hit_test (NAUTILUS_CANVAS_ITEM (item), icon_rect)) {
		return 0.0;
	} else {
		/* This value means not hit.
		 * It's kind of arbitrary. Can we do better?
		 */
		return item->canvas->pixels_per_unit * 2 + 10;
	}
}

static void
nautilus_canvas_item_translate (EelCanvasItem *item, double dx, double dy)
{
	NautilusCanvasItem *canvas_item;
	NautilusCanvasItemDetails *details;
	
	canvas_item = NAUTILUS_CANVAS_ITEM (item);
	details = canvas_item->details;

	details->x += dx;
	details->y += dy;
}

void
nautilus_canvas_item_get_bounds_for_layout (NautilusCanvasItem *canvas_item,
					    double *x1, double *y1, double *x2, double *y2)
{
	NautilusCanvasItemDetails *details;
	EelIRect *total_rect;

	details = canvas_item->details;

	nautilus_canvas_item_ensure_bounds_up_to_date (canvas_item);
	g_assert (details->bounds_cached);

	total_rect = &details->bounds_cache_for_layout;

	/* Return the result. */
	if (x1 != NULL) {
		*x1 = (int)details->x + total_rect->x0;
	}
	if (y1 != NULL) {
		*y1 = (int)details->y + total_rect->y0;
	}
	if (x2 != NULL) {
		*x2 = (int)details->x + total_rect->x1 + 1;
	}
	if (y2 != NULL) {
		*y2 = (int)details->y + total_rect->y1 + 1;
	}
}

void
nautilus_canvas_item_get_bounds_for_entire_item (NautilusCanvasItem *canvas_item,
						 double *x1, double *y1, double *x2, double *y2)
{
	NautilusCanvasItemDetails *details;
	EelIRect *total_rect;

	details = canvas_item->details;

	nautilus_canvas_item_ensure_bounds_up_to_date (canvas_item);
	g_assert (details->bounds_cached);

	total_rect = &details->bounds_cache_for_entire_item;

	/* Return the result. */
	if (x1 != NULL) {
		*x1 = (int)details->x + total_rect->x0;
	}
	if (y1 != NULL) {
		*y1 = (int)details->y + total_rect->y0;
	}
	if (x2 != NULL) {
		*x2 = (int)details->x + total_rect->x1 + 1;
	}
	if (y2 != NULL) {
		*y2 = (int)details->y + total_rect->y1 + 1;
	}
}
	
/* Bounds handler for the canvas canvas item. */
static void
nautilus_canvas_item_bounds (EelCanvasItem *item,
			     double *x1, double *y1, double *x2, double *y2)
{
	NautilusCanvasItem *canvas_item;
	NautilusCanvasItemDetails *details;
	EelIRect *total_rect;

	canvas_item = NAUTILUS_CANVAS_ITEM (item);
	details = canvas_item->details;

	g_assert (x1 != NULL);
	g_assert (y1 != NULL);
	g_assert (x2 != NULL);
	g_assert (y2 != NULL);

	nautilus_canvas_item_ensure_bounds_up_to_date (canvas_item);
	g_assert (details->bounds_cached);

	total_rect = &details->bounds_cache;

	/* Return the result. */
	*x1 = (int)details->x + total_rect->x0;
	*y1 = (int)details->y + total_rect->y0;
	*x2 = (int)details->x + total_rect->x1 + 1;
	*y2 = (int)details->y + total_rect->y1 + 1;
}

static void
nautilus_canvas_item_ensure_bounds_up_to_date (NautilusCanvasItem *canvas_item)
{
	NautilusCanvasItemDetails *details;
	EelIRect icon_rect, icon_rect_raw;
	EelIRect text_rect, text_rect_for_layout, text_rect_for_entire_text;
	EelIRect total_rect, total_rect_for_layout, total_rect_for_entire_text;
	EelCanvasItem *item;
	double pixels_per_unit;
	gint width, height;
	
	details = canvas_item->details;
	item = EEL_CANVAS_ITEM (canvas_item);

	if (!details->bounds_cached) {
		measure_label_text (canvas_item);

		pixels_per_unit = EEL_CANVAS_ITEM (item)->canvas->pixels_per_unit;

		/* Compute raw and scaled canvas rectangle. */
		icon_rect.x0 = 0;
		icon_rect.y0 = 0;
		icon_rect_raw.x0 = 0;
		icon_rect_raw.y0 = 0;

		get_scaled_icon_size (canvas_item, &width, &height);

		icon_rect_raw.x1 = icon_rect_raw.x0 + width;
		icon_rect_raw.y1 = icon_rect_raw.y0 + height;
		icon_rect.x1 = icon_rect_raw.x1 / pixels_per_unit;
		icon_rect.y1 = icon_rect_raw.y1 / pixels_per_unit;
		
		/* Compute text rectangle. */
		text_rect = compute_text_rectangle (canvas_item, icon_rect, FALSE, BOUNDS_USAGE_FOR_DISPLAY);
		text_rect_for_layout = compute_text_rectangle (canvas_item, icon_rect, FALSE, BOUNDS_USAGE_FOR_LAYOUT);
		text_rect_for_entire_text = compute_text_rectangle (canvas_item, icon_rect, FALSE, BOUNDS_USAGE_FOR_ENTIRE_ITEM);

		/* Compute total rectangle */
		eel_irect_union (&total_rect, &icon_rect, &text_rect);
		eel_irect_union (&total_rect_for_layout, &icon_rect, &text_rect_for_layout);
		eel_irect_union (&total_rect_for_entire_text, &icon_rect, &text_rect_for_entire_text);

		details->bounds_cache = total_rect;
		details->bounds_cache_for_layout = total_rect_for_layout;
		details->bounds_cache_for_entire_item = total_rect_for_entire_text;
		details->bounds_cached = TRUE;
	}
}

/* Get the rectangle of the canvas only, in world coordinates. */
EelDRect
nautilus_canvas_item_get_icon_rectangle (const NautilusCanvasItem *item)
{
	EelDRect rectangle;
	double pixels_per_unit;
	gint width, height;
	
	g_return_val_if_fail (NAUTILUS_IS_CANVAS_ITEM (item), eel_drect_empty);

	rectangle.x0 = item->details->x;
	rectangle.y0 = item->details->y;
	
	pixels_per_unit = EEL_CANVAS_ITEM (item)->canvas->pixels_per_unit;
	get_scaled_icon_size (NAUTILUS_CANVAS_ITEM (item), &width, &height);
	rectangle.x1 = rectangle.x0 + width / pixels_per_unit;
	rectangle.y1 = rectangle.y0 + height / pixels_per_unit;

	eel_canvas_item_i2w (EEL_CANVAS_ITEM (item),
			     &rectangle.x0,
			     &rectangle.y0);
	eel_canvas_item_i2w (EEL_CANVAS_ITEM (item),
			     &rectangle.x1,
			     &rectangle.y1);

	return rectangle;
}

/* Get the rectangle of the icon only, in canvas coordinates. */
static void
get_icon_rectangle (NautilusCanvasItem *item,
		    EelIRect *rect)
{
	gint width, height;

	g_assert (NAUTILUS_IS_CANVAS_ITEM (item));
	g_assert (rect != NULL);


	eel_canvas_w2c (EEL_CANVAS_ITEM (item)->canvas,
			item->details->x,
			item->details->y,
			&rect->x0,
			&rect->y0);
	
	get_scaled_icon_size (item, &width, &height);
	
	rect->x1 = rect->x0 + width;
	rect->y1 = rect->y0 + height;
}

void
nautilus_canvas_item_set_show_stretch_handles (NautilusCanvasItem *item,
					       gboolean show_stretch_handles)
{
	g_return_if_fail (NAUTILUS_IS_CANVAS_ITEM (item));
	g_return_if_fail (show_stretch_handles == FALSE || show_stretch_handles == TRUE);
	
	if (!item->details->show_stretch_handles == !show_stretch_handles) {
		return;
	}

	item->details->show_stretch_handles = show_stretch_handles;
	eel_canvas_item_request_update (EEL_CANVAS_ITEM (item));
}

/* Check if one of the stretch handles was hit. */
static gboolean
hit_test_stretch_handle (NautilusCanvasItem *item,
			 EelIRect probe_icon_rect,
			 GtkCornerType *corner)
{
	EelIRect icon_rect;
	GdkPixbuf *knob_pixbuf;
	int knob_width, knob_height;
	int hit_corner;
	
	g_assert (NAUTILUS_IS_CANVAS_ITEM (item));

	/* Make sure there are handles to hit. */
	if (!item->details->show_stretch_handles) {
		return FALSE;
	}

	/* Quick check to see if the rect hits the canvas at all. */
	icon_rect = item->details->icon_rect;
	if (!eel_irect_hits_irect (probe_icon_rect, icon_rect)) {
		return FALSE;
	}
	
	knob_pixbuf = get_knob_pixbuf ();
	knob_width = gdk_pixbuf_get_width (knob_pixbuf);
	knob_height = gdk_pixbuf_get_height (knob_pixbuf);
	g_object_unref (knob_pixbuf);

	/* Check for hits in the stretch handles. */
	hit_corner = -1;
	if (probe_icon_rect.x0 < icon_rect.x0 + knob_width) {
		if (probe_icon_rect.y0 < icon_rect.y0 + knob_height)
			hit_corner = GTK_CORNER_TOP_LEFT;
		else if (probe_icon_rect.y1 >= icon_rect.y1 - knob_height)
			hit_corner = GTK_CORNER_BOTTOM_LEFT;
	}
	else if (probe_icon_rect.x1 >= icon_rect.x1 - knob_width) {
		if (probe_icon_rect.y0 < icon_rect.y0 + knob_height)
			hit_corner = GTK_CORNER_TOP_RIGHT;
		else if (probe_icon_rect.y1 >= icon_rect.y1 - knob_height)
			hit_corner = GTK_CORNER_BOTTOM_RIGHT;
	}
	if (corner)
		*corner = hit_corner;

	return hit_corner != -1;
}

gboolean
nautilus_canvas_item_hit_test_stretch_handles (NautilusCanvasItem *item,
					       gdouble world_x,
					       gdouble world_y,
					       GtkCornerType *corner)
{
	EelIRect icon_rect;

	g_return_val_if_fail (NAUTILUS_IS_CANVAS_ITEM (item), FALSE);
	
	eel_canvas_w2c (EEL_CANVAS_ITEM (item)->canvas,
			world_x,
			world_y,
			&icon_rect.x0,
			&icon_rect.y0);
	icon_rect.x1 = icon_rect.x0 + 1;
	icon_rect.y1 = icon_rect.y0 + 1;
	return hit_test_stretch_handle (item, icon_rect, corner);
}

/* nautilus_canvas_item_hit_test_rectangle
 *
 * Check and see if there is an intersection between the item and the
 * canvas rect.
 */
gboolean
nautilus_canvas_item_hit_test_rectangle (NautilusCanvasItem *item, EelIRect icon_rect)
{
	g_return_val_if_fail (NAUTILUS_IS_CANVAS_ITEM (item), FALSE);

	return hit_test (item, icon_rect);
}

double
nautilus_canvas_item_get_max_text_width (NautilusCanvasItem *item)
{
	EelCanvasItem *canvas_item;

	canvas_item = EEL_CANVAS_ITEM (item);

	return MAX_TEXT_WIDTH_STANDARD * canvas_item->canvas->pixels_per_unit;
}

void
nautilus_canvas_item_set_entire_text (NautilusCanvasItem       *item,
				      gboolean                      entire_text)
{
	if (item->details->entire_text != entire_text) {
		item->details->entire_text = entire_text;

		nautilus_canvas_item_invalidate_label_size (item);
		eel_canvas_item_request_update (EEL_CANVAS_ITEM (item));
	}
}

/* Class initialization function for the canvas canvas item. */
static void
nautilus_canvas_item_class_init (NautilusCanvasItemClass *class)
{
	GObjectClass *object_class;
	EelCanvasItemClass *item_class;

	object_class = G_OBJECT_CLASS (class);
	item_class = EEL_CANVAS_ITEM_CLASS (class);

	object_class->finalize = nautilus_canvas_item_finalize;
	object_class->set_property = nautilus_canvas_item_set_property;
	object_class->get_property = nautilus_canvas_item_get_property;

        g_object_class_install_property (
					 object_class,
					 PROP_EDITABLE_TEXT,
					 g_param_spec_string ("editable_text",
							      "editable text",
							      "the editable label",
							      "", G_PARAM_READWRITE));

        g_object_class_install_property (
					 object_class,
					 PROP_ADDITIONAL_TEXT,
					 g_param_spec_string ("additional_text",
							      "additional text",
							      "some more text",
							      "", G_PARAM_READWRITE));

        g_object_class_install_property (
					 object_class,
					 PROP_HIGHLIGHTED_FOR_SELECTION,
					 g_param_spec_boolean ("highlighted_for_selection",
							       "highlighted for selection",
							       "whether we are highlighted for a selection",
							       FALSE, G_PARAM_READWRITE)); 

        g_object_class_install_property (
					 object_class,
					 PROP_HIGHLIGHTED_AS_KEYBOARD_FOCUS,
					 g_param_spec_boolean ("highlighted_as_keyboard_focus",
							       "highlighted as keyboard focus",
							       "whether we are highlighted to render keyboard focus",
							       FALSE, G_PARAM_READWRITE)); 


        g_object_class_install_property (
					 object_class,
					 PROP_HIGHLIGHTED_FOR_DROP,
					 g_param_spec_boolean ("highlighted_for_drop",
							       "highlighted for drop",
							       "whether we are highlighted for a D&D drop",
							       FALSE, G_PARAM_READWRITE));

	g_object_class_install_property (
					 object_class,
					 PROP_HIGHLIGHTED_FOR_CLIPBOARD,
					 g_param_spec_boolean ("highlighted_for_clipboard",
							       "highlighted for clipboard",
							       "whether we are highlighted for a clipboard paste (after we have been cut)",
							       FALSE, G_PARAM_READWRITE));

	item_class->update = nautilus_canvas_item_update;
	item_class->draw = nautilus_canvas_item_draw;
	item_class->point = nautilus_canvas_item_point;
	item_class->translate = nautilus_canvas_item_translate;
	item_class->bounds = nautilus_canvas_item_bounds;
	item_class->event = nautilus_canvas_item_event;

	atk_registry_set_factory_type (atk_get_default_registry (),
				       NAUTILUS_TYPE_CANVAS_ITEM,
				       nautilus_canvas_item_accessible_factory_get_type ());

	g_type_class_add_private (class, sizeof (NautilusCanvasItemDetails));
}

static GailTextUtil *
nautilus_canvas_item_get_text (GObject *text)
{
	return NAUTILUS_CANVAS_ITEM (text)->details->text_util;
}

static void
nautilus_canvas_item_text_interface_init (EelAccessibleTextIface *iface)
{
	iface->get_text = nautilus_canvas_item_get_text;
}

/* ============================= a11y interfaces =========================== */

static const char *nautilus_canvas_item_accessible_action_names[] = {
        "open",
        "menu",
        NULL
};

static const char *nautilus_canvas_item_accessible_action_descriptions[] = {
        "Open item",
        "Popup context menu",
        NULL
};

enum {
	ACTION_OPEN,
	ACTION_MENU,
	LAST_ACTION
};

typedef struct {
        char *action_descriptions[LAST_ACTION];
	char *image_description;
	char *description;
} NautilusCanvasItemAccessiblePrivate;

typedef struct {
	NautilusCanvasItem *item;
	gint action_number;
} NautilusCanvasItemAccessibleActionContext;

typedef struct {
	EelCanvasItemAccessible parent;
	NautilusCanvasItemAccessiblePrivate *priv;
} NautilusCanvasItemAccessible;

typedef struct {
	EelCanvasItemAccessibleClass parent_class;
} NautilusCanvasItemAccessibleClass;

#define GET_ACCESSIBLE_PRIV(o) ((NautilusCanvasItemAccessible *) o)->priv;

/* accessible AtkAction interface */
static gboolean
nautilus_canvas_item_accessible_idle_do_action (gpointer data)
{
	NautilusCanvasItem *item;
	NautilusCanvasItemAccessibleActionContext *ctx;
	NautilusCanvasIcon *icon;
	NautilusCanvasContainer *container;
	GList* selection;
	GList file_list;
        GdkEventButton button_event = { 0 };
	gint action_number;

	container = NAUTILUS_CANVAS_CONTAINER (data);
	container->details->a11y_item_action_idle_handler = 0;
	while (!g_queue_is_empty (container->details->a11y_item_action_queue)) {
		ctx = g_queue_pop_head (container->details->a11y_item_action_queue);
		action_number = ctx->action_number;	
		item = ctx->item;
		g_free (ctx);
		icon = item->user_data;

		switch (action_number) {
		case ACTION_OPEN:
			file_list.data = icon->data;
			file_list.next = NULL;
			file_list.prev = NULL;
        		g_signal_emit_by_name (container, "activate", &file_list);
			break;
		case ACTION_MENU:
			selection = nautilus_canvas_container_get_selection (container);
			if (selection == NULL ||
			    g_list_length (selection) != 1 ||
 			    selection->data != icon->data)  {
				g_list_free (selection);
				return FALSE;
			}
			g_list_free (selection);
        		g_signal_emit_by_name (container, "context-click-selection", &button_event);
			break;
		default :
			g_assert_not_reached ();
			break;
		}
	}
	return FALSE;
}

static gboolean
nautilus_canvas_item_accessible_do_action (AtkAction *accessible,
					   int i)
{
	NautilusCanvasItem *item;
	NautilusCanvasItemAccessibleActionContext *ctx;
	NautilusCanvasContainer *container;

	g_assert (i < LAST_ACTION);

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible)));
	if (!item) {
		return FALSE;
	}

	container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);
	switch (i) {
	case ACTION_OPEN:
	case ACTION_MENU:
		if (container->details->a11y_item_action_queue == NULL) {
			container->details->a11y_item_action_queue = g_queue_new ();
		}
		ctx = g_new (NautilusCanvasItemAccessibleActionContext, 1);
		ctx->action_number = i;
		ctx->item = item;
		g_queue_push_head (container->details->a11y_item_action_queue, ctx);
		if (container->details->a11y_item_action_idle_handler == 0) {
			container->details->a11y_item_action_idle_handler = g_idle_add (nautilus_canvas_item_accessible_idle_do_action, container);
		}
		break;
        default :
                g_warning ("Invalid action passed to NautilusCanvasItemAccessible::do_action");
                return FALSE;
        }

	return TRUE;
}

static int
nautilus_canvas_item_accessible_get_n_actions (AtkAction *accessible)
{
	return LAST_ACTION;
}

static const char *
nautilus_canvas_item_accessible_action_get_description (AtkAction *accessible,
							int i)
{
	NautilusCanvasItemAccessiblePrivate *priv;

	g_assert (i < LAST_ACTION);

	priv = GET_ACCESSIBLE_PRIV (accessible);

	if (priv->action_descriptions[i]) {
		return priv->action_descriptions[i];
	} else {
		return nautilus_canvas_item_accessible_action_descriptions[i];
	}
}

static const char *
nautilus_canvas_item_accessible_action_get_name (AtkAction *accessible, int i)
{
	g_assert (i < LAST_ACTION);

	return nautilus_canvas_item_accessible_action_names[i];
}

static const char *
nautilus_canvas_item_accessible_action_get_keybinding (AtkAction *accessible,
						       int i)
{
	g_assert (i < LAST_ACTION);

	return NULL;
}

static gboolean
nautilus_canvas_item_accessible_action_set_description (AtkAction *accessible,
							int i,
							const char *description)
{
	NautilusCanvasItemAccessiblePrivate *priv;

	g_assert (i < LAST_ACTION);

	priv = GET_ACCESSIBLE_PRIV (accessible);

	if (priv->action_descriptions[i]) {
		g_free (priv->action_descriptions[i]);
	}
	priv->action_descriptions[i] = g_strdup (description);

	return TRUE;
}

static void
nautilus_canvas_item_accessible_action_interface_init (AtkActionIface *iface)
{
	iface->do_action = nautilus_canvas_item_accessible_do_action;
	iface->get_n_actions = nautilus_canvas_item_accessible_get_n_actions;
	iface->get_description = nautilus_canvas_item_accessible_action_get_description;
	iface->get_keybinding = nautilus_canvas_item_accessible_action_get_keybinding;
	iface->get_name = nautilus_canvas_item_accessible_action_get_name;
	iface->set_description = nautilus_canvas_item_accessible_action_set_description;
}

static const gchar *
nautilus_canvas_item_accessible_get_name (AtkObject *accessible)
{
	NautilusCanvasItem *item;

	if (accessible->name) {
		return accessible->name;
	}

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible)));
	if (!item) {
		return NULL;
	}
	return item->details->editable_text;
}

static const gchar*
nautilus_canvas_item_accessible_get_description (AtkObject *accessible)
{
	NautilusCanvasItem *item;

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible)));
	if (!item) {
		return NULL;
	}

	return item->details->additional_text;
}

static AtkObject *
nautilus_canvas_item_accessible_get_parent (AtkObject *accessible)
{
	NautilusCanvasItem *item;
	
	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible)));
	if (!item) {
		return NULL;
	}

	return gtk_widget_get_accessible (GTK_WIDGET (EEL_CANVAS_ITEM (item)->canvas));
}

static int
nautilus_canvas_item_accessible_get_index_in_parent (AtkObject *accessible)
{
	NautilusCanvasItem *item;
	NautilusCanvasContainer *container;
	GList *l;
	NautilusCanvasIcon *icon;
	int i;

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible)));
	if (!item) {
		return -1;
	}
	
	container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);
	
	l = container->details->icons;
	i = 0;
	while (l) {
		icon = l->data;
		
		if (icon->item == item) {
			return i;
		}
		
		i++;
		l = l->next;
	}

	return -1;
}

static const gchar *
nautilus_canvas_item_accessible_get_image_description (AtkImage *image)
{
	NautilusCanvasItemAccessiblePrivate *priv;
	NautilusCanvasItem *item;
	NautilusCanvasIcon *icon;
	NautilusCanvasContainer *container;
	char *description;

	priv = GET_ACCESSIBLE_PRIV (image);

	if (priv->image_description) {
		return priv->image_description;
	} else {
		item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (image)));
		if (item == NULL) {
			return NULL;
		}
		icon = item->user_data;
		container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);
		description = nautilus_canvas_container_get_icon_description (container, icon->data);
		g_free (priv->description);
		priv->description = description;
		return priv->description;
	}
}

static void
nautilus_canvas_item_accessible_get_image_size
(AtkImage *image, 
 gint     *width,
 gint     *height)
{
	NautilusCanvasItem *item;

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (image)));
	get_scaled_icon_size (item, width, height);
}

static void
nautilus_canvas_item_accessible_get_image_position
(AtkImage		 *image,
 gint                    *x,
 gint	                 *y,
 AtkCoordType	         coord_type)
{
	NautilusCanvasItem *item;
	gint x_offset, y_offset, itmp;

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (image)));
	if (!item) {
		return;
	}
	if (!item->details->icon_rect.x0 && !item->details->icon_rect.x1) {
		return;
	} else {
		x_offset = 0;
		y_offset = 0;
		if (item->details->text_width) {
			itmp = item->details->icon_rect.x0 -
				item->details->text_rect.x0;
			if (itmp > x_offset) {
				x_offset = itmp;
			}
			itmp = item->details->icon_rect.y0 -
				item->details->text_rect.y0;
			if (itmp > y_offset) {
				y_offset = itmp;
			}
		}
	}
	atk_component_get_position (ATK_COMPONENT (image), x, y, coord_type);
	*x += x_offset;
	*y += y_offset;
}

static gboolean
nautilus_canvas_item_accessible_set_image_description (AtkImage    *image,
						       const gchar *description)
{
	NautilusCanvasItemAccessiblePrivate *priv;

	priv = GET_ACCESSIBLE_PRIV (image);

	g_free (priv->image_description);
	priv->image_description = g_strdup (description);

	return TRUE;
}

static void
nautilus_canvas_item_accessible_image_interface_init (AtkImageIface *iface)
{
	iface->get_image_description = nautilus_canvas_item_accessible_get_image_description;
	iface->set_image_description = nautilus_canvas_item_accessible_set_image_description;
	iface->get_image_size        = nautilus_canvas_item_accessible_get_image_size;
	iface->get_image_position    = nautilus_canvas_item_accessible_get_image_position;
}

/* accessible text interface */
static gint
nautilus_canvas_item_accessible_get_offset_at_point (AtkText	 *text,
						     gint           x,
						     gint           y,
						     AtkCoordType coords)
{
	gint real_x, real_y, real_width, real_height;
	NautilusCanvasItem *item;
	gint editable_height;
	gint offset = 0;
	gint index;
	PangoLayout *layout, *editable_layout, *additional_layout;
	PangoRectangle rect0;
	char *canvas_text;
	gboolean have_editable;
	gboolean have_additional;
	gint text_offset, height;

	atk_component_get_extents (ATK_COMPONENT (text), &real_x, &real_y,
                                   &real_width, &real_height, coords);

	x -= real_x;
	y -= real_y; 

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (text)));

	if (item->details->pixbuf) {
		get_scaled_icon_size (item, NULL, &height);
		y -= height;
	}
	have_editable = item->details->editable_text != NULL &&
		item->details->editable_text[0] != '\0';
	have_additional = item->details->additional_text != NULL &&item->details->additional_text[0] != '\0';

	editable_layout = NULL;
	additional_layout = NULL;
	if (have_editable) {
		editable_layout = get_label_layout (&item->details->editable_text_layout, item, item->details->editable_text);
		prepare_pango_layout_for_draw (item, editable_layout);
		pango_layout_get_pixel_size (editable_layout, NULL, &editable_height);
		if (y >= editable_height &&
                    have_additional) {
			prepare_pango_layout_for_draw (item, editable_layout);
			additional_layout = get_label_layout (&item->details->additional_text_layout, item, item->details->additional_text);
			layout = additional_layout;
			canvas_text = item->details->additional_text;
			y -= editable_height + LABEL_LINE_SPACING;
		} else {
			layout = editable_layout;
			canvas_text = item->details->editable_text;
		}
	} else if (have_additional) {
		additional_layout = get_label_layout (&item->details->additional_text_layout, item, item->details->additional_text);
		prepare_pango_layout_for_draw (item, additional_layout);
		layout = additional_layout;
		canvas_text = item->details->additional_text;
	} else {
		return 0;
	}

	text_offset = 0;
	if (have_editable) {
		pango_layout_index_to_pos (editable_layout, 0, &rect0);
		text_offset = PANGO_PIXELS (rect0.x);
	}
	if (have_additional) {
		gint itmp;

		pango_layout_index_to_pos (additional_layout, 0, &rect0);
		itmp = PANGO_PIXELS (rect0.x);
		if (itmp < text_offset) {
			text_offset = itmp;
		}
	}
	pango_layout_index_to_pos (layout, 0, &rect0);
	x += text_offset;
	if (!pango_layout_xy_to_index (layout, 
                                       x * PANGO_SCALE, 
                                       y * PANGO_SCALE, 
                                       &index, NULL)) {
		if (x < 0 || y < 0) {
			index = 0;
		} else {
			index = -1;
		}
	}
	if (index == -1) {
		offset = g_utf8_strlen (canvas_text, -1);
	} else {
		offset = g_utf8_pointer_to_offset (canvas_text, canvas_text + index);
	}
	if (layout == additional_layout) {
		offset += g_utf8_strlen (item->details->editable_text, -1);	
	}

	if (editable_layout != NULL) {
		g_object_unref (editable_layout);
	}
	
	if (additional_layout != NULL) {
		g_object_unref (additional_layout);
	}
	
	return offset;
}

static void
nautilus_canvas_item_accessible_get_character_extents (AtkText	   *text,
						       gint	   offset,
						       gint	   *x,
						       gint	   *y,
						       gint	   *width,
						       gint	   *height,
						       AtkCoordType coords)
{
	gint pos_x, pos_y;
	gint len, byte_offset;
	gint editable_height;
	gchar *canvas_text;
	NautilusCanvasItem *item;
	PangoLayout *layout, *editable_layout, *additional_layout;
	PangoRectangle rect;
	PangoRectangle rect0;
	gboolean have_editable;
	gint text_offset, pix_height;

	atk_component_get_position (ATK_COMPONENT (text), &pos_x, &pos_y, coords);
	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (text)));

	if (item->details->pixbuf) {
		get_scaled_icon_size (item, NULL, &pix_height);
		pos_y += pix_height;
	}

	have_editable = item->details->editable_text != NULL &&
		item->details->editable_text[0] != '\0';
	if (have_editable) {
		len = g_utf8_strlen (item->details->editable_text, -1);
	} else {
		len = 0;
	}

	editable_layout = get_label_layout (&item->details->editable_text_layout, item, item->details->editable_text);
	additional_layout = get_label_layout (&item->details->additional_text_layout, item, item->details->additional_text);
	
	if (offset < len) {
		canvas_text = item->details->editable_text;
		layout = editable_layout;
	} else {
		offset -= len;
		canvas_text = item->details->additional_text;
		layout = additional_layout;
		pos_y += LABEL_LINE_SPACING;
		if (have_editable) {
			pango_layout_get_pixel_size (editable_layout, NULL, &editable_height);
			pos_y += editable_height;
		}
	}
	byte_offset = g_utf8_offset_to_pointer (canvas_text, offset) - canvas_text;
	pango_layout_index_to_pos (layout, byte_offset, &rect);
	text_offset = 0;
	if (have_editable) {
		pango_layout_index_to_pos (editable_layout, 0, &rect0);
		text_offset = PANGO_PIXELS (rect0.x);
	}
	if (item->details->additional_text != NULL &&
	    item->details->additional_text[0] != '\0') {
		gint itmp;

		pango_layout_index_to_pos (additional_layout, 0, &rect0);
		itmp = PANGO_PIXELS (rect0.x);
		if (itmp < text_offset) {
			text_offset = itmp;
		}
	}

	g_object_unref (editable_layout);
	g_object_unref (additional_layout);

	*x = pos_x + PANGO_PIXELS (rect.x) - text_offset;
	*y = pos_y + PANGO_PIXELS (rect.y);
	*width = PANGO_PIXELS (rect.width);
	*height = PANGO_PIXELS (rect.height);
}

static void
nautilus_canvas_item_accessible_text_interface_init (AtkTextIface *iface)
{
 	iface->get_text                = eel_accessibility_text_get_text;
	iface->get_character_at_offset = eel_accessibility_text_get_character_at_offset;
        iface->get_text_before_offset  = eel_accessibility_text_get_text_before_offset;
        iface->get_text_at_offset      = eel_accessibility_text_get_text_at_offset;
   	iface->get_text_after_offset   = eel_accessibility_text_get_text_after_offset;
      	iface->get_character_count     = eel_accessibility_text_get_character_count;
	iface->get_character_extents   = nautilus_canvas_item_accessible_get_character_extents;
	iface->get_offset_at_point     = nautilus_canvas_item_accessible_get_offset_at_point;
}

static GType nautilus_canvas_item_accessible_get_type (void);

G_DEFINE_TYPE_WITH_CODE (NautilusCanvasItemAccessible,
			 nautilus_canvas_item_accessible,
			 eel_canvas_item_accessible_get_type (),
			 G_IMPLEMENT_INTERFACE (ATK_TYPE_IMAGE,
						nautilus_canvas_item_accessible_image_interface_init)
			 G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT,
						nautilus_canvas_item_accessible_text_interface_init)
			 G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION,
						nautilus_canvas_item_accessible_action_interface_init));

static AtkStateSet*
nautilus_canvas_item_accessible_ref_state_set (AtkObject *accessible)
{
	AtkStateSet *state_set;
	NautilusCanvasItem *item;
	NautilusCanvasContainer *container;
	GList *selection;
	gboolean one_item_selected;

	state_set = ATK_OBJECT_CLASS (nautilus_canvas_item_accessible_parent_class)->ref_state_set (accessible);

	item = NAUTILUS_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (accessible)));
	if (!item) {
		atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
		return state_set;
	}
	container = NAUTILUS_CANVAS_CONTAINER (EEL_CANVAS_ITEM (item)->canvas);
	if (item->details->is_highlighted_as_keyboard_focus) {
		atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
	} else if (!container->details->keyboard_focus) {
		selection = nautilus_canvas_container_get_selection (container);
		one_item_selected = (g_list_length (selection) == 1) &&
			item->details->is_highlighted_for_selection;

		if (one_item_selected) {
			atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
		}

		g_list_free (selection);
	}

	return state_set;
}

static void
nautilus_canvas_item_accessible_finalize (GObject *object)
{
	NautilusCanvasItemAccessiblePrivate *priv;
	int i;

	priv = GET_ACCESSIBLE_PRIV (object);

	for (i = 0; i < LAST_ACTION; i++) {
		g_free (priv->action_descriptions[i]);
	}
	g_free (priv->image_description);
	g_free (priv->description);

        G_OBJECT_CLASS (nautilus_canvas_item_accessible_parent_class)->finalize (object);
}

static void
nautilus_canvas_item_accessible_initialize (AtkObject *accessible,
					    gpointer widget)
{
	ATK_OBJECT_CLASS (nautilus_canvas_item_accessible_parent_class)->initialize (accessible, widget);

	atk_object_set_role (accessible, ATK_ROLE_CANVAS);
}

static void
nautilus_canvas_item_accessible_class_init (NautilusCanvasItemAccessibleClass *klass)
{
	AtkObjectClass *aclass = ATK_OBJECT_CLASS (klass);
	GObjectClass *oclass = G_OBJECT_CLASS (klass);

	oclass->finalize = nautilus_canvas_item_accessible_finalize;

	aclass->initialize = nautilus_canvas_item_accessible_initialize;

	aclass->get_name = nautilus_canvas_item_accessible_get_name;
	aclass->get_description = nautilus_canvas_item_accessible_get_description;
	aclass->get_parent = nautilus_canvas_item_accessible_get_parent;
	aclass->get_index_in_parent = nautilus_canvas_item_accessible_get_index_in_parent;
	aclass->ref_state_set = nautilus_canvas_item_accessible_ref_state_set;

	g_type_class_add_private (klass, sizeof (NautilusCanvasItemAccessiblePrivate));
}

static void
nautilus_canvas_item_accessible_init (NautilusCanvasItemAccessible *self)
{
	self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, nautilus_canvas_item_accessible_get_type (),
						  NautilusCanvasItemAccessiblePrivate);
}

/* dummy typedef */
typedef AtkObjectFactory      NautilusCanvasItemAccessibleFactory;
typedef AtkObjectFactoryClass NautilusCanvasItemAccessibleFactoryClass;

G_DEFINE_TYPE (NautilusCanvasItemAccessibleFactory, nautilus_canvas_item_accessible_factory,
	       ATK_TYPE_OBJECT_FACTORY);

static AtkObject *
nautilus_canvas_item_accessible_factory_create_accessible (GObject *for_object)
{
	AtkObject *accessible;
	NautilusCanvasItem *item;
	GString *item_text;

	item = NAUTILUS_CANVAS_ITEM (for_object);
	g_assert (item != NULL);

	item_text = g_string_new (NULL);
	if (item->details->editable_text) {
        	g_string_append (item_text, item->details->editable_text);
	}
	if (item->details->additional_text) {
        	g_string_append (item_text, item->details->additional_text);
	}

	item->details->text_util = gail_text_util_new ();
	gail_text_util_text_setup (item->details->text_util,
				   item_text->str);
	g_string_free (item_text, TRUE);

	accessible = g_object_new (nautilus_canvas_item_accessible_get_type (), NULL);
	atk_object_initialize (accessible, for_object);

	return accessible;
}

static GType
nautilus_canvas_item_accessible_factory_get_accessible_type (void)
{
	return nautilus_canvas_item_accessible_get_type ();
}

static void
nautilus_canvas_item_accessible_factory_init (NautilusCanvasItemAccessibleFactory *self)
{
}

static void
nautilus_canvas_item_accessible_factory_class_init (NautilusCanvasItemAccessibleFactoryClass *klass)
{
	klass->create_accessible = nautilus_canvas_item_accessible_factory_create_accessible;
	klass->get_accessible_type = nautilus_canvas_item_accessible_factory_get_accessible_type;
}
