/* LIBGIMP - The GIMP Library
 * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
 *
 * gimpprocview.c
 *
 * This library 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 3 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

/*
 * dbbrowser_utils.c
 * 0.08  26th sept 97  by Thomas NOEL <thomas@minet.net>
 *
 * 98/12/13  Sven Neumann <sven@gimp.org> : added help display
 */

#include "config.h"

#include <string.h>

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

#include "libgimpwidgets/gimpwidgets.h"

#include "gimp.h"

#include "gimpuitypes.h"
#include "gimpprocview.h"

#include "libgimp-intl.h"


/**
 * SECTION: gimpprocview
 * @title: GimpProcView
 * @short_description: A widget showing information about a PDB procedure.
 *
 * A widget showing information about a PDB procedure, mainly for the
 * procedure and plug-in browsers.
 **/


/*  local function prototypes  */

static GtkWidget * gimp_proc_view_create_params (const GimpParamDef *params,
                                                 gint                n_params,
                                                 GtkSizeGroup       *name_group,
                                                 GtkSizeGroup       *type_group,
                                                 GtkSizeGroup       *desc_group);


/*  public functions  */


/**
 * gimp_proc_view_new:
 * @name:
 * @menu_path:
 * @blurb:
 * @help:
 * @author:
 * @copyright:
 * @date:
 * @type:
 * @n_params:
 * @n_return_vals:
 * @params:
 * @return_vals:
 *
 * Return value: a new widget providing a view on a GIMP procedure
 *
 * Since: 2.4
 **/
GtkWidget *
gimp_proc_view_new (const gchar        *name,
                    const gchar        *menu_path,
                    const gchar        *blurb,
                    const gchar        *help,
                    const gchar        *author,
                    const gchar        *copyright,
                    const gchar        *date,
                    GimpPDBProcType     type,
                    gint                n_params,
                    gint                n_return_vals,
                    const GimpParamDef *params,
                    const GimpParamDef *return_vals)
{
  GtkWidget    *main_vbox;
  GtkWidget    *frame;
  GtkWidget    *vbox;
  GtkWidget    *table;
  GtkWidget    *label;
  GtkSizeGroup *name_group;
  GtkSizeGroup *type_group;
  GtkSizeGroup *desc_group;
  const gchar  *type_str;
  gint          row;

  if (blurb     && strlen (blurb) < 2)     blurb     = NULL;
  if (help      && strlen (help) < 2)      help      = NULL;
  if (author    && strlen (author) < 2)    author    = NULL;
  if (date      && strlen (date) < 2)      date      = NULL;
  if (copyright && strlen (copyright) < 2) copyright = NULL;

  if (blurb && help && ! strcmp (blurb, help))
    help = NULL;

  main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);

  /* show the name */

  frame = gimp_frame_new (name);
  label = gtk_frame_get_label_widget (GTK_FRAME (frame));
  gtk_label_set_selectable (GTK_LABEL (label), TRUE);
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
  gtk_container_add (GTK_CONTAINER (frame), vbox);
  gtk_widget_show (vbox);

  if (! gimp_enum_get_value (GIMP_TYPE_PDB_PROC_TYPE, type,
                             NULL, NULL, &type_str, NULL))
    type_str = "UNKNOWN";

  label = gtk_label_new (type_str);
  gimp_label_set_attributes (GTK_LABEL (label),
                             PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
                             -1);
  gtk_label_set_xalign (GTK_LABEL (label), 0.0);
  gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
  gtk_widget_show (label);

  if (menu_path)
    {
      label = gtk_label_new_with_mnemonic (menu_path);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
      gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
      gtk_widget_show (label);
    }

  if (blurb)
    {
      label = gtk_label_new (blurb);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
      gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
      gtk_widget_show (label);
    }

  name_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
  type_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
  desc_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);

  /* in parameters */
  if (n_params)
    {
      frame = gimp_frame_new (_("Parameters"));
      gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
      gtk_widget_show (frame);

      table = gimp_proc_view_create_params (params, n_params,
                                            name_group, type_group, desc_group);
      gtk_container_add (GTK_CONTAINER (frame), table);
      gtk_widget_show (table);
    }

  /* out parameters */
  if (n_return_vals)
    {
      frame = gimp_frame_new (_("Return Values"));
      gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
      gtk_widget_show (frame);

      table = gimp_proc_view_create_params (return_vals, n_return_vals,
                                            name_group, type_group, desc_group);
      gtk_container_add (GTK_CONTAINER (frame), table);
      gtk_widget_show (table);
    }

  if (! help && ! author && ! date && ! copyright)
    return main_vbox;

  frame = gimp_frame_new (_("Additional Information"));
  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
  gtk_widget_show (frame);

  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
  gtk_container_add (GTK_CONTAINER (frame), vbox);
  gtk_widget_show (vbox);

  /* show the help */
  if (help)
    {
      label = gtk_label_new (help);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
      gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
      gtk_widget_show (label);
    }

  /* show the author & the copyright */

  if (! author && ! date && ! copyright)
    return main_vbox;

  table = gtk_table_new (0, 2, FALSE);
  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
  gtk_table_set_row_spacings (GTK_TABLE (table), 4);
  gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
  gtk_widget_show (table);

  row = 0;

  if (author)
    {
      label = gtk_label_new (author);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_yalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);

      gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
                                 _("Author:"), 0.0, 0.0,
                                 label, 3, FALSE);
    }

  if (date)
    {
      label = gtk_label_new (date);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_yalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);

      gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
                                 _("Date:"), 0.0, 0.0,
                                 label, 3, FALSE);
    }

  if (copyright)
    {
      label = gtk_label_new (copyright);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_yalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);

      gimp_table_attach_aligned (GTK_TABLE (table), 0, row++,
                                 _("Copyright:"), 0.0, 0.0,
                                 label, 3, FALSE);
    }

  return main_vbox;
}


/*  private functions  */

static GtkWidget *
gimp_proc_view_create_params (const GimpParamDef *params,
                              gint                n_params,
                              GtkSizeGroup       *name_group,
                              GtkSizeGroup       *type_group,
                              GtkSizeGroup       *desc_group)
{
  GtkWidget *table;
  gint       i;

  table = gtk_table_new (n_params, 3, FALSE);
  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
  gtk_table_set_row_spacings (GTK_TABLE (table), 4);

  for (i = 0; i < n_params; i++)
    {
      GtkWidget   *label;
      const gchar *type;
      gchar       *upper;

      /* name */
      label = gtk_label_new (params[i].name);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_yalign (GTK_LABEL (label), 0.0);
      gtk_size_group_add_widget (name_group, label);
      gtk_table_attach (GTK_TABLE (table), label,
                        0, 1, i, i + 1, GTK_FILL, GTK_FILL, 0, 0);
      gtk_widget_show (label);

      /* type */
      if (! gimp_enum_get_value (GIMP_TYPE_PDB_ARG_TYPE, params[i].type,
                                 NULL, &type, NULL, NULL))
        upper = g_strdup ("UNKNOWN");
      else
        upper = g_ascii_strup (type, -1);

      label = gtk_label_new (upper);
      g_free (upper);

      gimp_label_set_attributes (GTK_LABEL (label),
                                 PANGO_ATTR_FAMILY, "monospace",
                                 PANGO_ATTR_STYLE,  PANGO_STYLE_ITALIC,
                                 -1);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_yalign (GTK_LABEL (label), 0.0);
      gtk_size_group_add_widget (type_group, label);
      gtk_table_attach (GTK_TABLE (table), label,
                        1, 2, i, i + 1, GTK_FILL, GTK_FILL, 0, 0);
      gtk_widget_show (label);

      /* description */
      label = gtk_label_new (params[i].description);
      gtk_label_set_selectable (GTK_LABEL (label), TRUE);
      gtk_label_set_xalign (GTK_LABEL (label), 0.0);
      gtk_label_set_yalign (GTK_LABEL (label), 0.0);
      gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
      gtk_size_group_add_widget (desc_group, label);
      gtk_table_attach (GTK_TABLE (table), label,
                        2, 3, i, i + 1, GTK_SHRINK | GTK_FILL, GTK_FILL, 0, 0);
      gtk_widget_show (label);
    }

  return table;
}
