/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <string.h>

#include <gtk/gtk.h>

#include "libgimpwidgets/gimpwidgets.h"

#include "gui-types.h"

#include "config/gimpguiconfig.h"

#include "core/gimp.h"
#include "core/gimp-utils.h"
#include "core/gimpbrush.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpgradient.h"
#include "core/gimpimage.h"
#include "core/gimppalette.h"
#include "core/gimppattern.h"
#include "core/gimpprogress.h"

#include "text/gimpfont.h"

#include "widgets/gimpactiongroup.h"
#include "widgets/gimpbrushselect.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimpdocked.h"
#include "widgets/gimpfontselect.h"
#include "widgets/gimpgradientselect.h"
#include "widgets/gimphelp.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpmenufactory.h"
#include "widgets/gimppaletteselect.h"
#include "widgets/gimppatternselect.h"
#include "widgets/gimpprogressdialog.h"
#include "widgets/gimpuimanager.h"
#include "widgets/gimpwidgets-utils.h"

#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "display/gimpdisplayshell.h"

#include "actions/plug-in-actions.h"

#include "menus/menus.h"

#include "gui-message.h"
#include "themes.h"


/*  local function prototypes  */

static void           gui_threads_enter        (Gimp                *gimp);
static void           gui_threads_leave        (Gimp                *gimp);
static void           gui_set_busy             (Gimp                *gimp);
static void           gui_unset_busy           (Gimp                *gimp);
static void           gui_help                 (Gimp                *gimp,
                                                const gchar         *help_domain,
                                                const gchar         *help_id);
static const gchar  * gui_get_program_class    (Gimp                *gimp);
static gchar        * gui_get_display_name     (Gimp                *gimp,
                                                gint                 display_ID,
                                                gint                *monitor_number);
static const gchar  * gui_get_theme_dir        (Gimp                *gimp);
static GimpObject   * gui_display_get_by_ID    (Gimp                *gimp,
                                                gint                 ID);
static gint           gui_display_get_ID       (GimpObject          *display);
static guint32        gui_display_get_window   (GimpObject          *display);
static GimpObject   * gui_display_create       (GimpImage           *image,
                                                GimpUnit             unit,
                                                gdouble              scale);
static void           gui_display_delete       (GimpObject          *display);
static void           gui_displays_reconnect   (Gimp                *gimp,
                                                GimpImage           *old_image,
                                                GimpImage           *new_image);
static GimpProgress * gui_new_progress         (Gimp                *gimp,
                                                GimpObject          *display);
static void           gui_free_progress        (Gimp                *gimp,
                                                GimpProgress        *progress);
static gboolean       gui_pdb_dialog_new       (Gimp                *gimp,
                                                GimpContext         *context,
                                                GimpContainer       *container,
                                                const gchar         *title,
                                                const gchar         *callback_name,
                                                const gchar         *object_name,
                                                va_list              args);
static gboolean       gui_pdb_dialog_set       (Gimp                *gimp,
                                                GimpContainer       *container,
                                                const gchar         *callback_name,
                                                const gchar         *object_name,
                                                va_list              args);
static gboolean       gui_pdb_dialog_close     (Gimp                *gimp,
                                                GimpContainer       *container,
                                                const gchar         *callback_name);


/*  public functions  */

void
gui_vtable_init (Gimp *gimp)
{
  g_return_if_fail (GIMP_IS_GIMP (gimp));

  gimp->gui.threads_enter       = gui_threads_enter;
  gimp->gui.threads_leave       = gui_threads_leave;
  gimp->gui.set_busy            = gui_set_busy;
  gimp->gui.unset_busy          = gui_unset_busy;
  gimp->gui.show_message        = gui_message;
  gimp->gui.help                = gui_help;
  gimp->gui.get_program_class   = gui_get_program_class;
  gimp->gui.get_display_name    = gui_get_display_name;
  gimp->gui.get_theme_dir       = gui_get_theme_dir;
  gimp->gui.display_get_by_id   = gui_display_get_by_ID;
  gimp->gui.display_get_id      = gui_display_get_ID;
  gimp->gui.display_get_window  = gui_display_get_window;
  gimp->gui.display_create      = gui_display_create;
  gimp->gui.display_delete      = gui_display_delete;
  gimp->gui.displays_reconnect  = gui_displays_reconnect;
  gimp->gui.progress_new        = gui_new_progress;
  gimp->gui.progress_free       = gui_free_progress;
  gimp->gui.pdb_dialog_new      = gui_pdb_dialog_new;
  gimp->gui.pdb_dialog_set      = gui_pdb_dialog_set;
  gimp->gui.pdb_dialog_close    = gui_pdb_dialog_close;
}


/*  private functions  */

static void
gui_threads_enter (Gimp *gimp)
{
  GDK_THREADS_ENTER ();
}

static void
gui_threads_leave (Gimp *gimp)
{
  GDK_THREADS_LEAVE ();
}

static void
gui_set_busy (Gimp *gimp)
{
  gimp_displays_set_busy (gimp);
  gimp_dialog_factories_set_busy ();

  gdk_flush ();
}

static void
gui_unset_busy (Gimp *gimp)
{
  gimp_displays_unset_busy (gimp);
  gimp_dialog_factories_unset_busy ();

  gdk_flush ();
}

static void
gui_help (Gimp        *gimp,
          const gchar *help_domain,
          const gchar *help_id)
{
  gimp_help_show (gimp, help_domain, help_id);
}

static const gchar *
gui_get_program_class (Gimp *gimp)
{
  return gdk_get_program_class ();
}

static gchar *
gui_get_display_name (Gimp *gimp,
                      gint  display_ID,
                      gint *monitor_number)
{
  GimpDisplay *display = NULL;
  GdkScreen   *screen;
  gint         monitor;

  if (display_ID > 0)
    display = gimp_display_get_by_ID (gimp, display_ID);

  if (display)
    {
      screen  = gtk_widget_get_screen (display->shell);
      monitor = gdk_screen_get_monitor_at_window (screen,
                                                  display->shell->window);
    }
  else
    {
      gint x, y;

      gdk_display_get_pointer (gdk_display_get_default (),
                               &screen, &x, &y, NULL);
      monitor = gdk_screen_get_monitor_at_point (screen, x, y);
    }

  *monitor_number = monitor;

  if (screen)
    return gdk_screen_make_display_name (screen);

  return NULL;
}

static const gchar *
gui_get_theme_dir (Gimp *gimp)
{
  return themes_get_theme_dir (gimp, GIMP_GUI_CONFIG (gimp->config)->theme);
}

static GimpObject *
gui_display_get_by_ID (Gimp *gimp,
                       gint  ID)
{
  return (GimpObject *) gimp_display_get_by_ID (gimp, ID);
}

static gint
gui_display_get_ID (GimpObject *display)
{
  return gimp_display_get_ID (GIMP_DISPLAY (display));
}

static guint32
gui_display_get_window (GimpObject *display)
{
  GimpDisplay *disp = GIMP_DISPLAY (display);

  if (disp->shell)
    return (guint32) gimp_window_get_native (GTK_WINDOW (disp->shell));

  return 0;
}

static GimpObject *
gui_display_create (GimpImage *image,
                    GimpUnit   unit,
                    gdouble    scale)
{
  GimpDisplay *display;
  GList       *image_managers;

  image_managers = gimp_ui_managers_from_name ("<Image>");

  display = gimp_display_new (image, unit, scale,
                              global_menu_factory,
                              image_managers->data);

  gimp_context_set_display (gimp_get_user_context (image->gimp), display);

  gimp_ui_manager_update (GIMP_DISPLAY_SHELL (display->shell)->menubar_manager,
                          display);

  return GIMP_OBJECT (display);
}

static void
gui_display_delete (GimpObject *display)
{
  gimp_display_delete (GIMP_DISPLAY (display));
}

static void
gui_displays_reconnect (Gimp      *gimp,
                        GimpImage *old_image,
                        GimpImage *new_image)
{
  gimp_displays_reconnect (gimp, old_image, new_image);
}

static GimpProgress *
gui_new_progress (Gimp       *gimp,
                  GimpObject *display)
{
  g_return_val_if_fail (display == NULL || GIMP_IS_DISPLAY (display), NULL);

  if (display)
    return GIMP_PROGRESS (display);

  return GIMP_PROGRESS (gimp_progress_dialog_new ());
}

static void
gui_free_progress (Gimp          *gimp,
                   GimpProgress  *progress)
{
  g_return_if_fail (GIMP_IS_PROGRESS_DIALOG (progress));

  if (GIMP_IS_PROGRESS_DIALOG (progress))
    gtk_widget_destroy (GTK_WIDGET (progress));
}

static gboolean
gui_pdb_dialog_new (Gimp          *gimp,
                    GimpContext   *context,
                    GimpContainer *container,
                    const gchar   *title,
                    const gchar   *callback_name,
                    const gchar   *object_name,
                    va_list        args)
{
  GType        dialog_type = G_TYPE_NONE;
  const gchar *dialog_role = NULL;
  const gchar *help_id     = NULL;

  if (container->children_type == GIMP_TYPE_BRUSH)
    {
      dialog_type = GIMP_TYPE_BRUSH_SELECT;
      dialog_role = "gimp-brush-selection";
      help_id     = GIMP_HELP_BRUSH_DIALOG;
    }
  else if (container->children_type == GIMP_TYPE_FONT)
    {
      dialog_type = GIMP_TYPE_FONT_SELECT;
      dialog_role = "gimp-font-selection";
      help_id     = GIMP_HELP_FONT_DIALOG;
    }
  else if (container->children_type == GIMP_TYPE_GRADIENT)
    {
      dialog_type = GIMP_TYPE_GRADIENT_SELECT;
      dialog_role = "gimp-gradient-selection";
      help_id     = GIMP_HELP_GRADIENT_DIALOG;
    }
  else if (container->children_type == GIMP_TYPE_PALETTE)
    {
      dialog_type = GIMP_TYPE_PALETTE_SELECT;
      dialog_role = "gimp-palette-selection";
      help_id     = GIMP_HELP_PALETTE_DIALOG;
    }
  else if (container->children_type == GIMP_TYPE_PATTERN)
    {
      dialog_type = GIMP_TYPE_PATTERN_SELECT;
      dialog_role = "gimp-pattern-selection";
      help_id     = GIMP_HELP_PATTERN_DIALOG;
    }

  if (dialog_type != G_TYPE_NONE)
    {
      GimpObject *object = NULL;

      if (object_name && strlen (object_name))
        object = gimp_container_get_child_by_name (container, object_name);

      if (! object)
        object = gimp_context_get_by_type (context, container->children_type);

      if (object)
        {
          GParameter *params   = NULL;
          gint        n_params = 0;
          GtkWidget  *dialog;
          GtkWidget  *view;

          params = gimp_parameters_append (dialog_type, params, &n_params,
                                           "title",          title,
                                           "role",           dialog_role,
                                           "help-func",      gimp_standard_help_func,
                                           "help-id",        help_id,
                                           "pdb",            gimp->pdb,
                                           "context",        context,
                                           "select-type",    container->children_type,
                                           "initial-object", object,
                                           "callback-name",  callback_name,
                                           "menu-factory",   global_menu_factory,
                                           NULL);

          params = gimp_parameters_append_valist (dialog_type,
                                                  params, &n_params,
                                                  args);

          dialog = g_object_newv (dialog_type, n_params, params);

          gimp_parameters_free (params, n_params);

          view = GIMP_PDB_DIALOG (dialog)->view;
          if (view)
            gimp_docked_set_show_button_bar (GIMP_DOCKED (view), FALSE);

          gtk_widget_show (dialog);

          return TRUE;
        }
    }

  return FALSE;
}

static gboolean
gui_pdb_dialog_set (Gimp          *gimp,
                    GimpContainer *container,
                    const gchar   *callback_name,
                    const gchar   *object_name,
                    va_list        args)
{
  GimpPdbDialogClass *klass = NULL;

  if (container->children_type == GIMP_TYPE_BRUSH)
    klass = g_type_class_peek (GIMP_TYPE_BRUSH_SELECT);
  else if (container->children_type == GIMP_TYPE_FONT)
    klass = g_type_class_peek (GIMP_TYPE_FONT_SELECT);
  else if (container->children_type == GIMP_TYPE_GRADIENT)
    klass = g_type_class_peek (GIMP_TYPE_GRADIENT_SELECT);
  else if (container->children_type == GIMP_TYPE_PALETTE)
    klass = g_type_class_peek (GIMP_TYPE_PALETTE_SELECT);
  else if (container->children_type == GIMP_TYPE_PATTERN)
    klass = g_type_class_peek (GIMP_TYPE_PATTERN_SELECT);

  if (klass)
    {
      GimpPdbDialog *dialog;

      dialog = gimp_pdb_dialog_get_by_callback (klass, callback_name);

      if (dialog && dialog->select_type == container->children_type)
        {
          GimpObject *object;

          object = gimp_container_get_child_by_name (container, object_name);

          if (object)
            {
              const gchar *prop_name = va_arg (args, const gchar *);

              gimp_context_set_by_type (dialog->context, dialog->select_type,
                                        object);

              if (prop_name)
                g_object_set_valist (G_OBJECT (dialog), prop_name, args);

              gtk_window_present (GTK_WINDOW (dialog));

              return TRUE;
            }
        }
    }

  return FALSE;
}

static gboolean
gui_pdb_dialog_close (Gimp          *gimp,
                      GimpContainer *container,
                      const gchar   *callback_name)
{
  GimpPdbDialogClass *klass = NULL;

  if (container->children_type == GIMP_TYPE_BRUSH)
    klass = g_type_class_peek (GIMP_TYPE_BRUSH_SELECT);
  else if (container->children_type == GIMP_TYPE_FONT)
    klass = g_type_class_peek (GIMP_TYPE_FONT_SELECT);
  else if (container->children_type == GIMP_TYPE_GRADIENT)
    klass = g_type_class_peek (GIMP_TYPE_GRADIENT_SELECT);
  else if (container->children_type == GIMP_TYPE_PALETTE)
    klass = g_type_class_peek (GIMP_TYPE_PALETTE_SELECT);
  else if (container->children_type == GIMP_TYPE_PATTERN)
    klass = g_type_class_peek (GIMP_TYPE_PATTERN_SELECT);

  if (klass)
    {
      GimpPdbDialog *dialog;

      dialog = gimp_pdb_dialog_get_by_callback (klass, callback_name);

      if (dialog && dialog->select_type == container->children_type)
        {
          gtk_widget_destroy (GTK_WIDGET (dialog));
          return TRUE;
        }
    }

  return FALSE;
}
