/*
 * 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 the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>  
 *
 *
 * Authors:
 *		Vladimir Vukicevic <vladimir@ximian.com>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <stdio.h>

#include <libgnomecanvas/gnome-canvas.h>

#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include "e-cell-pixbuf.h"

G_DEFINE_TYPE (ECellPixbuf, e_cell_pixbuf, E_CELL_TYPE)

typedef struct _ECellPixbufView ECellPixbufView;

struct _ECellPixbufView {
	ECellView cell_view;
	GnomeCanvas *canvas;
};

/* Object argument IDs */
enum {
	PROP_0,

	PROP_SELECTED_COLUMN,
	PROP_FOCUSED_COLUMN,
	PROP_UNSELECTED_COLUMN
};

/*
 * ECellPixbuf functions
 */

ECell *
e_cell_pixbuf_new (void)
{
    ECellPixbuf *ecp;

    ecp = g_object_new (E_CELL_PIXBUF_TYPE, NULL);
    e_cell_pixbuf_construct (ecp);

    return (ECell *) ecp;
}

void
e_cell_pixbuf_construct (ECellPixbuf *ecp)
{
    /* noop */
    return;
}

/*
 * ECell methods
 */

static ECellView *
pixbuf_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
{
    ECellPixbufView *pixbuf_view = g_new0 (ECellPixbufView, 1);
    ETableItem *eti = E_TABLE_ITEM (e_table_item_view);
    GnomeCanvas *canvas = GNOME_CANVAS_ITEM (eti)->canvas;

    pixbuf_view->cell_view.ecell = ecell;
    pixbuf_view->cell_view.e_table_model = table_model;
    pixbuf_view->cell_view.e_table_item_view = e_table_item_view;
    pixbuf_view->cell_view.kill_view_cb = NULL;
    pixbuf_view->cell_view.kill_view_cb_data = NULL;

    pixbuf_view->canvas = canvas;

    return (ECellView *) pixbuf_view;
}

static void
pixbuf_kill_view (ECellView *ecell_view)
{
    ECellPixbufView *pixbuf_view = (ECellPixbufView *) ecell_view;

    if (pixbuf_view->cell_view.kill_view_cb)
        (pixbuf_view->cell_view.kill_view_cb)(ecell_view, pixbuf_view->cell_view.kill_view_cb_data);

    if (pixbuf_view->cell_view.kill_view_cb_data)
        g_list_free(pixbuf_view->cell_view.kill_view_cb_data);

    g_free (pixbuf_view);
}

static void
pixbuf_draw (ECellView *ecell_view, GdkDrawable *drawable,
             int model_col, int view_col, int row, ECellFlags flags,
             int x1, int y1, int x2, int y2)
{
    GdkPixbuf *cell_pixbuf;
    int real_x, real_y, real_w, real_h;
    int pix_w, pix_h;
    cairo_t *cr;
	
    cell_pixbuf = e_table_model_value_at (ecell_view->e_table_model,
							  1, row);

    /* we can't make sure we really got a pixbuf since, well, it's a Gdk thing */

    if (x2 - x1 == 0)
        return;

    if (!cell_pixbuf)
	return;

    pix_w = gdk_pixbuf_get_width (cell_pixbuf);
    pix_h = gdk_pixbuf_get_height (cell_pixbuf);

    /* We center the pixbuf within our allocated space */
    if (x2 - x1 > pix_w) {
        int diff = (x2 - x1) - pix_w;
        real_x = x1 + diff/2;
        real_w = pix_w;
    } else {
        real_x = x1;
        real_w = x2 - x1;
    }

    if (y2 - y1 > pix_h) {
        int diff = (y2 - y1) - pix_h;
        real_y = y1 + diff/2;
        real_h = pix_h;
    } else {
        real_y = y1;
        real_h = y2 - y1;
    }

    cr = gdk_cairo_create (drawable);
    cairo_save (cr);
    gdk_cairo_set_source_pixbuf (cr, cell_pixbuf, real_x, real_y);
    cairo_paint_with_alpha (cr, 1);
    cairo_restore (cr);
    cairo_destroy (cr);	
}

static gint
pixbuf_event (ECellView *ecell_view, GdkEvent *event,
              int model_col, int view_col, int row,
              ECellFlags flags, ECellActions *actions)
{
    /* noop */

    return FALSE;
}

static gint
pixbuf_height (ECellView *ecell_view, int model_col, int view_col, int row)
{
    GdkPixbuf *pixbuf;
    if (row == -1) {
      if (e_table_model_row_count (ecell_view->e_table_model) > 0) {
        row = 0;
      } else {
	return 6;
      }
    }

    pixbuf = (GdkPixbuf *) e_table_model_value_at (ecell_view->e_table_model, 1, row);
    if (!pixbuf)
        return 0;

    /* We give ourselves 3 pixels of padding on either side */
    return gdk_pixbuf_get_height (pixbuf) + 6;
}

/*
 * ECell::print method
 */
static void
pixbuf_print (ECellView *ecell_view, GtkPrintContext *context,
	      int model_col, int view_col, int row,
	      double width, double height)
{
	GdkPixbuf *pixbuf;
	int scale;
	cairo_t *cr = gtk_print_context_get_cairo_context (context);

	pixbuf = (GdkPixbuf *) e_table_model_value_at (ecell_view->e_table_model, 1, row);
	if (pixbuf == NULL)
		return;

	scale = gdk_pixbuf_get_height (pixbuf);
	cairo_save (cr);
	cairo_translate (cr, 0, (double)(height - scale) / (double)2);
	gdk_cairo_set_source_pixbuf (cr, pixbuf, (double)scale, (double)scale);
	cairo_paint (cr);
	cairo_restore (cr);
}

static gdouble
pixbuf_print_height (ECellView *ecell_view, GtkPrintContext *context,
		     int model_col, int view_col, int row,
		     double width)
{
	GdkPixbuf *pixbuf;

	if (row == -1) {
		if (e_table_model_row_count (ecell_view->e_table_model) > 0) {
			row = 0;
		} else {
			return 6;
		}
	}

	pixbuf = (GdkPixbuf *) e_table_model_value_at (ecell_view->e_table_model, 1, row);
	if (!pixbuf)
		return 0;

	/* We give ourselves 3 pixels of padding on either side */
	return gdk_pixbuf_get_height (pixbuf);
}

static gint
pixbuf_max_width (ECellView *ecell_view, int model_col, int view_col)
{
    int pw;
    gint num_rows, i;
    gint max_width = -1;

    if (model_col == 0) {
        num_rows = e_table_model_row_count (ecell_view->e_table_model);

        for (i = 0; i <= num_rows; i++) {
            GdkPixbuf *pixbuf = (GdkPixbuf *) e_table_model_value_at
                (ecell_view->e_table_model,
                 1,
                 i);
           if (!pixbuf)
               continue;
            pw = gdk_pixbuf_get_width (pixbuf);
            if (max_width < pw)
                max_width = pw;
        }
    } else {
        return -1;
    }

    return max_width;
}

static void
pixbuf_dispose (GObject *object)
{
	if (G_OBJECT_CLASS (e_cell_pixbuf_parent_class)->dispose)
		(* G_OBJECT_CLASS (e_cell_pixbuf_parent_class)->dispose) (object);
}

static void
pixbuf_set_property (GObject *object,
		     guint prop_id,
		     const GValue *value,
		     GParamSpec *pspec)
{
	ECellPixbuf *pixbuf;

	pixbuf = E_CELL_PIXBUF (object);

	switch (prop_id) {
	case PROP_SELECTED_COLUMN:
		pixbuf->selected_column = g_value_get_int (value);
		break;

	case PROP_FOCUSED_COLUMN:
		pixbuf->focused_column = g_value_get_int (value);
		break;

	case PROP_UNSELECTED_COLUMN:
		pixbuf->unselected_column = g_value_get_int (value);
		break;

	default:
		return;
	}
}

/* Get_arg handler for the pixbuf item */
static void
pixbuf_get_property (GObject *object,
		     guint prop_id,
		     GValue *value,
		     GParamSpec *pspec)
{
	ECellPixbuf *pixbuf;

	pixbuf = E_CELL_PIXBUF (object);

	switch (prop_id) {
	case PROP_SELECTED_COLUMN:
		g_value_set_int (value, pixbuf->selected_column);
		break;

	case PROP_FOCUSED_COLUMN:
		g_value_set_int (value, pixbuf->focused_column);
		break;

	case PROP_UNSELECTED_COLUMN:
		g_value_set_int (value, pixbuf->unselected_column);
		break;

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

static void
e_cell_pixbuf_init (ECellPixbuf *ecp)
{
	ecp->selected_column = -1;
	ecp->focused_column = -1;
	ecp->unselected_column = -1;
}

static void
e_cell_pixbuf_class_init (ECellPixbufClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);
	ECellClass *ecc = E_CELL_CLASS (klass);

	object_class->dispose = pixbuf_dispose;
	object_class->set_property = pixbuf_set_property;
	object_class->get_property = pixbuf_get_property;

	ecc->new_view = pixbuf_new_view;
	ecc->kill_view = pixbuf_kill_view;
	ecc->draw = pixbuf_draw;
	ecc->event = pixbuf_event;
	ecc->height = pixbuf_height;
	ecc->print = pixbuf_print;
	ecc->print_height = pixbuf_print_height;
	ecc->max_width = pixbuf_max_width;

	g_object_class_install_property (object_class, PROP_SELECTED_COLUMN,
					 g_param_spec_int ("selected_column",
							   _("Selected Column"),
							   /*_( */"XXX blurb" /*)*/,
							   0, G_MAXINT, 0,
							   G_PARAM_READWRITE));

	g_object_class_install_property (object_class, PROP_FOCUSED_COLUMN,
					 g_param_spec_int ("focused_column",
							   _("Focused Column"),
							   /*_( */"XXX blurb" /*)*/,
							   0, G_MAXINT, 0,
							   G_PARAM_READWRITE));

	g_object_class_install_property (object_class, PROP_UNSELECTED_COLUMN,
					 g_param_spec_int ("unselected_column",
							   _("Unselected Column"),
							   /*_( */"XXX blurb" /*)*/,
							   0, G_MAXINT, 0,
							   G_PARAM_READWRITE));
}