/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * GimpImagePropView
 * Copyright (C) 2005  Michael Natterer <mitch@gimp.org>
 * Copyright (C) 2006  Sven Neumann <sven@gimp.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <sys/types.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <gegl.h>
#include <gtk/gtk.h>
#include <glib/gstdio.h>

#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"

#include "widgets-types.h"

#include "core/gimp.h"
#include "core/gimpcontainer.h"
#include "core/gimpimage.h"
#include "core/gimpimage-colormap.h"
#include "core/gimpimage-undo.h"
#include "core/gimpundostack.h"
#include "core/gimp-utils.h"

#include "file/file-procedure.h"
#include "file/file-utils.h"

#include "plug-in/gimppluginmanager.h"
#include "plug-in/gimppluginprocedure.h"

#include "gimpimagepropview.h"
#include "gimppropwidgets.h"

#include "gimp-intl.h"


enum
{
  PROP_0,
  PROP_IMAGE
};


static void        gimp_image_prop_view_constructed  (GObject           *object);
static void        gimp_image_prop_view_set_property (GObject           *object,
                                                      guint              property_id,
                                                      const GValue      *value,
                                                      GParamSpec        *pspec);
static void        gimp_image_prop_view_get_property (GObject           *object,
                                                      guint              property_id,
                                                      GValue            *value,
                                                      GParamSpec        *pspec);

static GtkWidget * gimp_image_prop_view_add_label    (GtkTable          *table,
                                                      gint               row,
                                                      const gchar       *text);
static void        gimp_image_prop_view_undo_event   (GimpImage         *image,
                                                      GimpUndoEvent      event,
                                                      GimpUndo          *undo,
                                                      GimpImagePropView *view);
static void        gimp_image_prop_view_update       (GimpImagePropView *view);
static void        gimp_image_prop_view_file_update  (GimpImagePropView *view);


G_DEFINE_TYPE (GimpImagePropView, gimp_image_prop_view, GTK_TYPE_TABLE)

#define parent_class gimp_image_prop_view_parent_class


static void
gimp_image_prop_view_class_init (GimpImagePropViewClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->constructed  = gimp_image_prop_view_constructed;
  object_class->set_property = gimp_image_prop_view_set_property;
  object_class->get_property = gimp_image_prop_view_get_property;

  g_object_class_install_property (object_class, PROP_IMAGE,
                                   g_param_spec_object ("image", NULL, NULL,
                                                        GIMP_TYPE_IMAGE,
                                                        GIMP_PARAM_READWRITE |
                                                        G_PARAM_CONSTRUCT_ONLY));
}

static void
gimp_image_prop_view_init (GimpImagePropView *view)
{
  GtkTable *table = GTK_TABLE (view);
  gint      row = 0;

  gtk_table_resize (table, 14, 2);

  gtk_table_set_col_spacings (table, 6);
  gtk_table_set_row_spacings (table, 3);

  view->pixel_size_label =
    gimp_image_prop_view_add_label (table, row++, _("Size in pixels:"));

  view->print_size_label =
    gimp_image_prop_view_add_label (table, row++, _("Print size:"));

  view->resolution_label =
    gimp_image_prop_view_add_label (table, row++, _("Resolution:"));

  view->colorspace_label =
    gimp_image_prop_view_add_label (table, row, _("Color space:"));

  gtk_table_set_row_spacing (GTK_TABLE (view), row++, 12);

  view->filename_label =
    gimp_image_prop_view_add_label (table, row++, _("File Name:"));

  gtk_label_set_ellipsize (GTK_LABEL (view->filename_label),
                           PANGO_ELLIPSIZE_MIDDLE);

  view->filesize_label =
    gimp_image_prop_view_add_label (table, row++, _("File Size:"));

  view->filetype_label =
    gimp_image_prop_view_add_label (table, row, _("File Type:"));

  gtk_table_set_row_spacing (GTK_TABLE (view), row++, 12);

  view->memsize_label =
    gimp_image_prop_view_add_label (table, row++, _("Size in memory:"));

  view->undo_label =
    gimp_image_prop_view_add_label (table, row++, _("Undo steps:"));

  view->redo_label =
    gimp_image_prop_view_add_label (table, row, _("Redo steps:"));

  gtk_table_set_row_spacing (GTK_TABLE (view), row++, 12);

  view->pixels_label =
    gimp_image_prop_view_add_label (table, row++, _("Number of pixels:"));

  view->layers_label =
    gimp_image_prop_view_add_label (table, row++, _("Number of layers:"));

  view->channels_label =
    gimp_image_prop_view_add_label (table, row++, _("Number of channels:"));

  view->vectors_label =
    gimp_image_prop_view_add_label (table, row++, _("Number of paths:"));

}

static void
gimp_image_prop_view_constructed (GObject *object)
{
  GimpImagePropView *view = GIMP_IMAGE_PROP_VIEW (object);

  if (G_OBJECT_CLASS (parent_class)->constructed)
    G_OBJECT_CLASS (parent_class)->constructed (object);

  g_assert (view->image != NULL);

  g_signal_connect_object (view->image, "name-changed",
                           G_CALLBACK (gimp_image_prop_view_file_update),
                           G_OBJECT (view),
                           G_CONNECT_SWAPPED);

  g_signal_connect_object (view->image, "size-changed",
                           G_CALLBACK (gimp_image_prop_view_update),
                           G_OBJECT (view),
                           G_CONNECT_SWAPPED);
  g_signal_connect_object (view->image, "resolution-changed",
                           G_CALLBACK (gimp_image_prop_view_update),
                           G_OBJECT (view),
                           G_CONNECT_SWAPPED);
  g_signal_connect_object (view->image, "unit-changed",
                           G_CALLBACK (gimp_image_prop_view_update),
                           G_OBJECT (view),
                           G_CONNECT_SWAPPED);
  g_signal_connect_object (view->image, "mode-changed",
                           G_CALLBACK (gimp_image_prop_view_update),
                           G_OBJECT (view),
                           G_CONNECT_SWAPPED);
  g_signal_connect_object (view->image, "undo-event",
                           G_CALLBACK (gimp_image_prop_view_undo_event),
                           G_OBJECT (view),
                           0);

  gimp_image_prop_view_update (view);
  gimp_image_prop_view_file_update (view);
}

static void
gimp_image_prop_view_set_property (GObject      *object,
                                   guint         property_id,
                                   const GValue *value,
                                   GParamSpec   *pspec)
{
  GimpImagePropView *view = GIMP_IMAGE_PROP_VIEW (object);

  switch (property_id)
    {
    case PROP_IMAGE:
      view->image = g_value_get_object (value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
gimp_image_prop_view_get_property (GObject    *object,
                                   guint       property_id,
                                   GValue     *value,
                                   GParamSpec *pspec)
{
  GimpImagePropView *view = GIMP_IMAGE_PROP_VIEW (object);

  switch (property_id)
    {
    case PROP_IMAGE:
      g_value_set_object (value, view->image);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}


/*  public functions  */

GtkWidget *
gimp_image_prop_view_new (GimpImage *image)
{
  g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);

  return g_object_new (GIMP_TYPE_IMAGE_PROP_VIEW,
                       "image", image,
                       NULL);
}


/*  private functions  */

static GtkWidget *
gimp_image_prop_view_add_label (GtkTable    *table,
                                gint         row,
                                const gchar *text)
{
  GtkWidget *label;
  GtkWidget *desc;

  desc = g_object_new (GTK_TYPE_LABEL,
                       "label",  text,
                       "xalign", 1.0,
                       "yalign", 0.5,
                       NULL);
  gimp_label_set_attributes (GTK_LABEL (desc),
                             PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
                             -1);
  gtk_table_attach (table, desc,
                    0, 1, row, row + 1, GTK_FILL, GTK_FILL, 0, 0);
  gtk_widget_show (desc);

  label = g_object_new (GTK_TYPE_LABEL,
                        "xalign",     0.0,
                        "yalign",     0.5,
                        "selectable", TRUE,
                        NULL);

  gtk_table_attach (table, label,
                    1, 2, row, row + 1, GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);

  gtk_widget_show (label);

  return label;
}

static void
gimp_image_prop_view_label_set_memsize (GtkWidget  *label,
                                        GimpObject *object)
{
  gchar *str = g_format_size (gimp_object_get_memsize (object, NULL));
  gtk_label_set_text (GTK_LABEL (label), str);
  g_free (str);
}

static void
gimp_image_prop_view_label_set_filename (GtkWidget *label,
                                         GimpImage *image)
{
  const gchar *uri = gimp_image_get_any_uri (image);

  if (uri)
    {
      gchar *name = file_utils_uri_display_name (uri);

      gtk_label_set_text (GTK_LABEL (label), name);
      g_free (name);
    }
  else
    {
      gtk_label_set_text (GTK_LABEL (label), NULL);
      gimp_help_set_help_data (gtk_widget_get_parent (label), NULL, NULL);
    }
}

static void
gimp_image_prop_view_label_set_filesize (GtkWidget *label,
                                         GimpImage *image)
{
  const gchar *uri      = gimp_image_get_any_uri (image);
  gchar       *filename = NULL;

  if (uri)
    filename = g_filename_from_uri (uri, NULL, NULL);

  if (filename)
    {
      struct stat  buf;

      if (g_stat (filename, &buf) == 0)
        {
          gchar *str = g_format_size (buf.st_size);

          gtk_label_set_text (GTK_LABEL (label), str);
          g_free (str);
        }
      else
        {
          gtk_label_set_text (GTK_LABEL (label), NULL);
        }

      g_free (filename);
    }
  else
    {
      gtk_label_set_text (GTK_LABEL (label), NULL);
    }
}

static void
gimp_image_prop_view_label_set_filetype (GtkWidget *label,
                                         GimpImage *image)
{
  GimpPlugInManager   *manager = image->gimp->plug_in_manager;
  GimpPlugInProcedure *proc;

  proc = gimp_image_get_save_proc (image);

  if (! proc)
    proc = gimp_image_get_load_proc (image);

  if (! proc)
    {
      gchar *filename = gimp_image_get_filename (image);

      if (filename)
        {
          proc = file_procedure_find (manager->load_procs, filename, NULL);
          g_free (filename);
        }
    }

  gtk_label_set_text (GTK_LABEL (label),
                      proc ? gimp_plug_in_procedure_get_label (proc) : NULL);
}

static void
gimp_image_prop_view_label_set_undo (GtkWidget     *label,
                                     GimpUndoStack *stack)
{
  gint steps = gimp_undo_stack_get_depth (stack);

  if (steps > 0)
    {
      GimpObject *object = GIMP_OBJECT (stack);
      gchar      *str;
      gchar       buf[256];

      str = g_format_size (gimp_object_get_memsize (object, NULL));
      g_snprintf (buf, sizeof (buf), "%d (%s)", steps, str);
      g_free (str);

      gtk_label_set_text (GTK_LABEL (label), buf);
    }
  else
    {
      /*  no undo (or redo) steps available  */
      gtk_label_set_text (GTK_LABEL (label), _("None"));
    }
}

static void
gimp_image_prop_view_undo_event (GimpImage         *image,
                                 GimpUndoEvent      event,
                                 GimpUndo          *undo,
                                 GimpImagePropView *view)
{
  gimp_image_prop_view_update (view);
}

static void
gimp_image_prop_view_update (GimpImagePropView *view)
{
  GimpImage         *image = view->image;
  GimpImageBaseType  type;
  GimpUnit           unit;
  gdouble            unit_factor;
  gint               unit_digits;
  const gchar       *desc;
  gchar              format_buf[32];
  gchar              buf[256];
  gdouble            xres;
  gdouble            yres;

  gimp_image_get_resolution (image, &xres, &yres);

  /*  pixel size  */
  g_snprintf (buf, sizeof (buf), ngettext ("%d × %d pixel",
                                           "%d × %d pixels",
                                           gimp_image_get_height (image)),
              gimp_image_get_width  (image),
              gimp_image_get_height (image));
  gtk_label_set_text (GTK_LABEL (view->pixel_size_label), buf);

  /*  print size  */
  unit = gimp_get_default_unit ();

  unit_digits = gimp_unit_get_digits (unit);

  g_snprintf (format_buf, sizeof (format_buf), "%%.%df × %%.%df %s",
              unit_digits + 1, unit_digits + 1,
              gimp_unit_get_plural (unit));
  g_snprintf (buf, sizeof (buf), format_buf,
              gimp_pixels_to_units (gimp_image_get_width  (image), unit, xres),
              gimp_pixels_to_units (gimp_image_get_height (image), unit, yres));
  gtk_label_set_text (GTK_LABEL (view->print_size_label), buf);

  /*  resolution  */
  unit        = gimp_image_get_unit (image);
  unit_factor = gimp_unit_get_factor (unit);

  g_snprintf (format_buf, sizeof (format_buf), _("pixels/%s"),
              gimp_unit_get_abbreviation (unit));
  g_snprintf (buf, sizeof (buf), _("%g × %g %s"),
              xres / unit_factor,
              yres / unit_factor,
              unit == GIMP_UNIT_INCH ? _("ppi") : format_buf);
  gtk_label_set_text (GTK_LABEL (view->resolution_label), buf);

  /*  color type  */
  type = gimp_image_base_type (image);

  gimp_enum_get_value (GIMP_TYPE_IMAGE_BASE_TYPE, type,
                       NULL, NULL, &desc, NULL);

  switch (type)
    {
    case GIMP_RGB:
    case GIMP_GRAY:
      g_snprintf (buf, sizeof (buf), "%s", desc);
      break;
    case GIMP_INDEXED:
      g_snprintf (buf, sizeof (buf),
                  "%s (%d %s)", desc, gimp_image_get_colormap_size (image),
                  _("colors"));
      break;
    }

  gtk_label_set_text (GTK_LABEL (view->colorspace_label), buf);

  /*  size in memory  */
  gimp_image_prop_view_label_set_memsize (view->memsize_label,
                                          GIMP_OBJECT (image));

  /*  undo / redo  */
  gimp_image_prop_view_label_set_undo (view->undo_label,
                                       gimp_image_get_undo_stack (image));
  gimp_image_prop_view_label_set_undo (view->redo_label,
                                       gimp_image_get_redo_stack (image));

  /*  number of layers  */
  g_snprintf (buf, sizeof (buf), "%d",
              gimp_image_get_width  (image) *
              gimp_image_get_height (image));
  gtk_label_set_text (GTK_LABEL (view->pixels_label), buf);

  /*  number of layers  */
  g_snprintf (buf, sizeof (buf), "%d",
              gimp_image_get_n_layers (image));
  gtk_label_set_text (GTK_LABEL (view->layers_label), buf);

  /*  number of channels  */
  g_snprintf (buf, sizeof (buf), "%d",
              gimp_image_get_n_channels (image));
  gtk_label_set_text (GTK_LABEL (view->channels_label), buf);

  /*  number of vectors  */
  g_snprintf (buf, sizeof (buf), "%d",
              gimp_image_get_n_vectors (image));
  gtk_label_set_text (GTK_LABEL (view->vectors_label), buf);
}

static void
gimp_image_prop_view_file_update (GimpImagePropView *view)
{
  GimpImage *image = view->image;

  /*  filename  */
  gimp_image_prop_view_label_set_filename (view->filename_label, image);

  /*  filesize  */
  gimp_image_prop_view_label_set_filesize (view->filesize_label, image);

  /*  filetype  */
  gimp_image_prop_view_label_set_filetype (view->filetype_label, image);
}