/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimpmessagebox.c
 * Copyright (C) 2004 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 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 <gtk/gtk.h>

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

#include "widgets-types.h"

#include "gimpmessagebox.h"

#include "gimp-intl.h"


#define GIMP_MESSAGE_BOX_SPACING  12

enum
{
  PROP_0,
  PROP_STOCK_ID
};


static void      gimp_message_box_class_init    (GimpMessageBoxClass   *klass);

static GObject * gimp_message_box_constructor   (GType                  type,
                                                 guint                  n_params,
                                                 GObjectConstructParam *params);

static void      gimp_message_box_init          (GimpMessageBox *box);
static void      gimp_message_box_finalize      (GObject        *object);
static void      gimp_message_box_set_property  (GObject        *object,
                                                 guint           property_id,
                                                 const GValue   *value,
                                                 GParamSpec     *pspec);
static void      gimp_message_box_get_property  (GObject        *object,
                                                 guint           property_id,
                                                 GValue         *value,
                                                 GParamSpec     *pspec);
static void      gimp_message_box_destroy       (GtkObject      *object);

static void      gimp_message_box_forall        (GtkContainer   *container,
                                                 gboolean        include_internals,
                                                 GtkCallback     callback,
                                                 gpointer        callback_data);

static void      gimp_message_box_size_request  (GtkWidget      *widget,
                                                 GtkRequisition *requisition);
static void      gimp_message_box_size_allocate (GtkWidget      *widget,
                                                 GtkAllocation  *allocation);


static GtkVBoxClass *parent_class = NULL;


GType
gimp_message_box_get_type (void)
{
  static GType box_type = 0;

  if (! box_type)
    {
      static const GTypeInfo box_info =
      {
        sizeof (GimpMessageBoxClass),
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) gimp_message_box_class_init,
        NULL,           /* class_finalize */
        NULL,           /* class_data     */
        sizeof (GimpMessageBox),
        0,              /* n_preallocs    */
        (GInstanceInitFunc) gimp_message_box_init
      };

      box_type = g_type_register_static (GTK_TYPE_VBOX,
                                         "GimpMessageBox",
                                         &box_info, 0);
    }

  return box_type;
}

static void
gimp_message_box_class_init (GimpMessageBoxClass *klass)
{
  GObjectClass      *object_class     = G_OBJECT_CLASS (klass);
  GtkObjectClass    *gtk_object_class = GTK_OBJECT_CLASS (klass);
  GtkWidgetClass    *widget_class     = GTK_WIDGET_CLASS (klass);
  GtkContainerClass *container_class  = GTK_CONTAINER_CLASS (klass);

  parent_class = g_type_class_peek_parent (klass);

  object_class->constructor   = gimp_message_box_constructor;
  object_class->set_property  = gimp_message_box_set_property;
  object_class->get_property  = gimp_message_box_get_property;
  object_class->finalize      = gimp_message_box_finalize;

  gtk_object_class->destroy   = gimp_message_box_destroy;

  widget_class->size_request  = gimp_message_box_size_request;
  widget_class->size_allocate = gimp_message_box_size_allocate;

  container_class->forall     = gimp_message_box_forall;

  g_object_class_install_property (object_class, PROP_STOCK_ID,
                                   g_param_spec_string ("stock-id", NULL, NULL,
                                                        NULL,
                                                        G_PARAM_READWRITE |
                                                        G_PARAM_CONSTRUCT_ONLY));
}

static void
gimp_message_box_init (GimpMessageBox *box)
{
  gint i;

  gtk_box_set_spacing (GTK_BOX (box), 12);
  gtk_container_set_border_width (GTK_CONTAINER (box), 12);

  for (i = 0; i < 2; i++)
    {
      GtkWidget *label = g_object_new (GTK_TYPE_LABEL,
                                       "wrap",       TRUE,
                                       "selectable", TRUE,
                                       "can-focus",  FALSE,
                                       "xalign",     0.0,
                                       "yalign",     0.5,
                                       NULL);

      if (i == 0)
        gimp_label_set_attributes (GTK_LABEL (label),
                                   PANGO_ATTR_SCALE,  PANGO_SCALE_LARGE,
                                   PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
                                   -1);

      gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);

      box->label[i] = label;
    }

  box->repeat   = 0;
  box->label[2] = NULL;
}

static void
gimp_message_box_finalize (GObject *object)
{
  GimpMessageBox *box = GIMP_MESSAGE_BOX (object);

  if (box->stock_id)
    {
      g_free (box->stock_id);
      box->stock_id = NULL;
    }

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

static GObject *
gimp_message_box_constructor (GType                  type,
                              guint                  n_params,
                              GObjectConstructParam *params)
{
  GObject        *object;
  GimpMessageBox *box;

  object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);

  box = GIMP_MESSAGE_BOX (object);

  if (box->stock_id)
    {
      gtk_widget_push_composite_child ();
      box->image = gtk_image_new_from_stock (box->stock_id,
                                             GTK_ICON_SIZE_DIALOG);
      gtk_widget_pop_composite_child ();

      gtk_misc_set_alignment (GTK_MISC (box->image), 0.5, 0.0);
      gtk_widget_set_parent (box->image, GTK_WIDGET (box));
      gtk_widget_show (box->image);
    }

  return object;
}

static void
gimp_message_box_set_property (GObject      *object,
                               guint         property_id,
                               const GValue *value,
                               GParamSpec   *pspec)
{
  GimpMessageBox *box = GIMP_MESSAGE_BOX (object);

  switch (property_id)
    {
    case PROP_STOCK_ID:
      box->stock_id = g_value_dup_string (value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
gimp_message_box_get_property (GObject    *object,
                               guint       property_id,
                               GValue     *value,
                               GParamSpec *pspec)
{
  GimpMessageBox *box = GIMP_MESSAGE_BOX (object);

  switch (property_id)
    {
    case PROP_STOCK_ID:
      g_value_set_string (value, box->stock_id);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
gimp_message_box_destroy (GtkObject *object)
{
  GimpMessageBox *box = GIMP_MESSAGE_BOX (object);

  if (box->image)
    {
      gtk_widget_unparent (box->image);
      box->image = NULL;
    }

  GTK_OBJECT_CLASS (parent_class)->destroy (object);
}

static void
gimp_message_box_size_request (GtkWidget      *widget,
                               GtkRequisition *requisition)
{
  GimpMessageBox *box = GIMP_MESSAGE_BOX (widget);

  GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);

  if (box->image && GTK_WIDGET_VISIBLE (box->image))
    {
      GtkRequisition  child_requisition;

      gtk_widget_size_request (box->image, &child_requisition);

      requisition->width  += child_requisition.width + GIMP_MESSAGE_BOX_SPACING;
      requisition->height = MAX (requisition->height,
                                 child_requisition.height +
                                 2 * GTK_CONTAINER (widget)->border_width);
    }
}

static void
gimp_message_box_size_allocate (GtkWidget     *widget,
                                GtkAllocation *allocation)
{
  GimpMessageBox *box       = GIMP_MESSAGE_BOX (widget);
  GtkContainer   *container = GTK_CONTAINER (widget);
  gint            width     = 0;
  gboolean        rtl;

  rtl = (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);

  if (box->image)
    {
      GtkRequisition  child_requisition;
      GtkAllocation   child_allocation;
      gint            height;

      gtk_widget_size_request (box->image, &child_requisition);

      width  = MIN (allocation->width - 2 * container->border_width,
                    child_requisition.width + GIMP_MESSAGE_BOX_SPACING);
      width  = MAX (1, width);

      height = allocation->height - 2 * container->border_width;
      height = MAX (1, height);

      if (rtl)
        child_allocation.x  = (allocation->width       -
                               container->border_width -
                               child_requisition.width);
      else
        child_allocation.x  = allocation->x + container->border_width;

      child_allocation.y      = allocation->y + container->border_width;
      child_allocation.width  = width;
      child_allocation.height = height;

      gtk_widget_size_allocate (box->image, &child_allocation);
    }

  allocation->x     += rtl ? 0 : width;
  allocation->width -= width;

  GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);

  allocation->x      -= rtl ? 0 : width;
  allocation->width  += width;

  widget->allocation = *allocation;
}

static void
gimp_message_box_forall (GtkContainer *container,
                         gboolean      include_internals,
                         GtkCallback   callback,
                         gpointer      callback_data)
{
  if (include_internals)
    {
      GimpMessageBox *box = GIMP_MESSAGE_BOX (container);

      if (box->image)
        (* callback) (box->image, callback_data);
    }

  GTK_CONTAINER_CLASS (parent_class)->forall (container, include_internals,
                                              callback, callback_data);
}

static void
gimp_message_box_set_label_text (GimpMessageBox *box,
                                 gint            n,
                                 const gchar    *format,
                                 va_list         args)
{
  GtkWidget *label = box->label[n];

  if (format)
    {
      gchar *text = g_strdup_vprintf (format, args);
      gchar *utf8 = gimp_any_to_utf8 (text, -1, "Cannot convert text to utf8.");

      gtk_label_set_text (GTK_LABEL (label), utf8);
      gtk_widget_show (label);

      g_free (utf8);
      g_free (text);
    }
  else
    {
      gtk_widget_hide (label);
      gtk_label_set_text (GTK_LABEL (label), NULL);
    }
}

static void
gimp_message_box_set_label_markup (GimpMessageBox *box,
                                   gint            n,
                                   const gchar    *format,
                                   va_list         args)
{
  GtkWidget *label = box->label[n];

  if (format)
    {
      gchar *text = g_markup_vprintf_escaped (format, args);

      gtk_label_set_markup (GTK_LABEL (label), text);
      gtk_widget_show (label);

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

/*  public functions  */

GtkWidget *
gimp_message_box_new (const gchar *stock_id)
{
  return g_object_new (GIMP_TYPE_MESSAGE_BOX,
                       "stock_id",  stock_id,
                       NULL);
}

void
gimp_message_box_set_primary_text (GimpMessageBox *box,
                                   const gchar    *format,
                                   ...)
{
  va_list args;

  g_return_if_fail (GIMP_IS_MESSAGE_BOX (box));

  va_start (args, format);
  gimp_message_box_set_label_text (box, 0, format, args);
  va_end (args);
}

void
gimp_message_box_set_text (GimpMessageBox *box,
                           const gchar    *format,
                           ...)
{
  va_list args;

  g_return_if_fail (GIMP_IS_MESSAGE_BOX (box));

  va_start (args, format);
  gimp_message_box_set_label_text (box, 1, format, args);
  va_end (args);
}

void
gimp_message_box_set_markup (GimpMessageBox *box,
                             const gchar    *format,
                             ...)
{
  va_list args;

  g_return_if_fail (GIMP_IS_MESSAGE_BOX (box));

  va_start (args, format);
  gimp_message_box_set_label_markup (box, 1,format, args);
  va_end (args);
}

gint
gimp_message_box_repeat (GimpMessageBox *box)
{
  gchar *message;

  g_return_val_if_fail (GIMP_IS_MESSAGE_BOX (box), 0);

  box->repeat++;

  if (box->repeat > 1)
    message = g_strdup_printf (_("Message repeated %d times."), box->repeat);
  else
    message = g_strdup (_("Message repeated once."));

  if (box->label[2])
    {
      gtk_label_set_text (GTK_LABEL (box->label[2]), message);
    }
  else
    {
      GtkWidget *label = box->label[2] = gtk_label_new (message);

      gtk_misc_set_alignment (GTK_MISC (label), 0.0, 1.0);
      gimp_label_set_attributes (GTK_LABEL (label),
                                 PANGO_ATTR_STYLE, PANGO_STYLE_OBLIQUE,
                                 -1);
      gtk_box_pack_end (GTK_BOX (box), label, FALSE, FALSE, 0);
      gtk_widget_show (label);
    }

  g_free (message);

  return box->repeat;
}