/* Dia -- an diagram creation/manipulation program
 * Copyright (C) 1998 Alexander Larsson
 *
 * 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 <assert.h>
#include <gtk/gtk.h>
#include <math.h>

#include "config.h"
#include "intl.h"
#include "object.h"
#include "connectionpoint.h"
#include "render.h"
#include "font.h"
#include "text.h"
#include "attributes.h"
#include "widgets.h"
#include "properties.h"

#include "pixmaps/text.xpm"

#define HANDLE_TEXT HANDLE_CUSTOM1

typedef struct _Textobj Textobj;
typedef struct _TextobjDefaultsDialog TextobjDefaultsDialog;

struct _Textobj {
  Object object;
  
  Handle text_handle;

  Text *text;
};

typedef struct _TextobjProperties {
  Alignment alignment;
  Color color;
} TextobjProperties;

struct _TextobjDefaultsDialog {
  GtkWidget *vbox;

  DiaAlignmentSelector *alignment;
  DiaFontSelector *font;
  GtkSpinButton *font_size;
};

static TextobjDefaultsDialog *textobj_defaults_dialog;
static TextobjProperties default_properties =
{ ALIGN_CENTER }; /* Can't initialize the font here */

static real textobj_distance_from(Textobj *textobj, Point *point);
static void textobj_select(Textobj *textobj, Point *clicked_point,
			   Renderer *interactive_renderer);
static void textobj_move_handle(Textobj *textobj, Handle *handle,
				Point *to, HandleMoveReason reason, ModifierKeys modifiers);
static void textobj_move(Textobj *textobj, Point *to);
static void textobj_draw(Textobj *textobj, Renderer *renderer);
static void textobj_update_data(Textobj *textobj);
static Object *textobj_create(Point *startpoint,
			      void *user_data,
			      Handle **handle1,
			      Handle **handle2);
static void textobj_destroy(Textobj *textobj);
static Object *textobj_copy(Textobj *textobj);

static PropDescription *textobj_describe_props(Textobj *textobj);
static void textobj_get_props(Textobj *textobj, Property *props, guint nprops);
static void textobj_set_props(Textobj *textobj, Property *props, guint nprops);

static void textobj_save(Textobj *textobj, ObjectNode obj_node,
			 const char *filename);
static Object *textobj_load(ObjectNode obj_node, int version,
			    const char *filename);
static GtkWidget *textobj_get_defaults(void);
static void textobj_apply_defaults(void);

static ObjectTypeOps textobj_type_ops =
{
  (CreateFunc) textobj_create,
  (LoadFunc)   textobj_load,
  (SaveFunc)   textobj_save,
  (GetDefaultsFunc) textobj_get_defaults,
  (ApplyDefaultsFunc) textobj_apply_defaults
};

ObjectType textobj_type =
{
  "Standard - Text",   /* name */
  0,                   /* version */
  (char **) text_xpm,  /* pixmap */

  &textobj_type_ops    /* ops */
};

ObjectType *_textobj_type = (ObjectType *) &textobj_type;

static ObjectOps textobj_ops = {
  (DestroyFunc)         textobj_destroy,
  (DrawFunc)            textobj_draw,
  (DistanceFunc)        textobj_distance_from,
  (SelectFunc)          textobj_select,
  (CopyFunc)            textobj_copy,
  (MoveFunc)            textobj_move,
  (MoveHandleFunc)      textobj_move_handle,
  (GetPropertiesFunc)   object_create_props_dialog,
  (ApplyPropertiesFunc) object_apply_props_from_dialog,
  (ObjectMenuFunc)      NULL,
  (DescribePropsFunc)   textobj_describe_props,
  (GetPropsFunc)        textobj_get_props,
  (SetPropsFunc)        textobj_set_props,
};

static PropDescription textobj_props[] = {
  OBJECT_COMMON_PROPERTIES,
  PROP_STD_TEXT_ALIGNMENT,
  PROP_STD_TEXT_FONT,
  PROP_STD_TEXT_HEIGHT,
  PROP_STD_TEXT_COLOUR,
  PROP_STD_TEXT,
  PROP_DESC_END
};

static PropDescription *
textobj_describe_props(Textobj *textobj)
{
  if (textobj_props[0].quark == 0)
    prop_desc_list_calculate_quarks(textobj_props);
  return textobj_props;
}

static PropOffset textobj_offsets[] = {
  OBJECT_COMMON_PROPERTIES_OFFSETS,
  { NULL, 0, 0 }
};

static struct { const gchar *name; GQuark q; } quarks[] = {
  { "text_alignment" },
  { "text_font" },
  { "text_height" },
  { "text_colour" },
  { "text" }
};

static void
textobj_get_props(Textobj *textobj, Property *props, guint nprops)
{
  guint i;

  if (object_get_props_from_offsets((Object *)textobj, textobj_offsets,
				    props, nprops))
    return;
  if (quarks[0].q == 0)
    for (i = 0; i < 5; i++)
      quarks[i].q = g_quark_from_static_string(quarks[i].name);
 
  for (i = 0; i < nprops; i++) {
    GQuark pquark = g_quark_from_string(props[i].name);

    if (pquark == quarks[0].q) {
      props[i].type = PROP_TYPE_ENUM;
      PROP_VALUE_ENUM(props[i]) = textobj->text->alignment;
    } else if (pquark == quarks[1].q) {
      props[i].type = PROP_TYPE_FONT;
      PROP_VALUE_FONT(props[i]) = textobj->text->font;
    } else if (pquark == quarks[2].q) {
      props[i].type = PROP_TYPE_REAL;
      PROP_VALUE_REAL(props[i]) = textobj->text->height;
    } else if (pquark == quarks[3].q) {
      props[i].type = PROP_TYPE_COLOUR;
      PROP_VALUE_COLOUR(props[i]) = textobj->text->color;
    } else if (pquark == quarks[4].q) {
      props[i].type = PROP_TYPE_STRING;
      g_free(PROP_VALUE_STRING(props[i]));
      PROP_VALUE_STRING(props[i]) = text_get_string_copy(textobj->text);
    }
  }
}

static void
textobj_set_props(Textobj *textobj, Property *props, guint nprops)
{
  if (!object_set_props_from_offsets((Object *)textobj, textobj_offsets,
                                     props, nprops)) {
    guint i;

    if (quarks[0].q == 0)
      for (i = 0; i < 4; i++)
        quarks[i].q = g_quark_from_static_string(quarks[i].name);

    for (i = 0; i < nprops; i++) {
      GQuark pquark = g_quark_from_string(props[i].name);

      if (pquark == quarks[0].q && props[i].type == PROP_TYPE_ENUM) {
	text_set_alignment(textobj->text, PROP_VALUE_ENUM(props[i]));
      } else if (pquark == quarks[1].q && props[i].type == PROP_TYPE_FONT) {
        text_set_font(textobj->text, PROP_VALUE_FONT(props[i]));
      } else if (pquark == quarks[2].q && props[i].type == PROP_TYPE_REAL) {
        text_set_height(textobj->text, PROP_VALUE_REAL(props[i]));
      } else if (pquark == quarks[3].q && props[i].type == PROP_TYPE_COLOUR) {
        text_set_color(textobj->text, &PROP_VALUE_COLOUR(props[i]));
      } else if (pquark == quarks[4].q && props[i].type == PROP_TYPE_STRING) {
        text_set_string(textobj->text, PROP_VALUE_STRING(props[i]));
      }
    }
  }
  textobj_update_data(textobj);
}

static void
textobj_apply_defaults()
{
  default_properties.alignment = dia_alignment_selector_get_alignment(textobj_defaults_dialog->alignment);
  attributes_set_default_font(
      dia_font_selector_get_font(textobj_defaults_dialog->font),
      gtk_spin_button_get_value_as_float(textobj_defaults_dialog->font_size));
}

static GtkWidget *
textobj_get_defaults()
{
  GtkWidget *alignment;
  GtkWidget *fontsel;
  GtkWidget *font_size;
  GtkWidget *hbox;
  GtkWidget *vbox;
  GtkWidget *label;
  GtkAdjustment *adj;
  Font *font;
  real font_height;

  if (textobj_defaults_dialog == NULL) {
    textobj_defaults_dialog = g_new(TextobjDefaultsDialog, 1);
    
    vbox = gtk_vbox_new(FALSE, 5);
    textobj_defaults_dialog->vbox = vbox;

    gtk_object_ref(GTK_OBJECT(vbox));
    gtk_object_sink(GTK_OBJECT(vbox));

    hbox = gtk_hbox_new(FALSE, 5);
    label = gtk_label_new(_("Alignment:"));
    gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
    gtk_widget_show (label);
    alignment = dia_alignment_selector_new();
    textobj_defaults_dialog->alignment = DIAALIGNMENTSELECTOR(alignment);
    gtk_box_pack_start (GTK_BOX (hbox), alignment, TRUE, TRUE, 0);
    gtk_widget_show (alignment);
    gtk_widget_show(hbox);
    gtk_box_pack_start (GTK_BOX(vbox), hbox, TRUE, TRUE, 0);

    hbox = gtk_hbox_new(FALSE, 5);
    label = gtk_label_new(_("Font:"));
    gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
    gtk_widget_show (label);
    fontsel = dia_font_selector_new();
    textobj_defaults_dialog->font = DIAFONTSELECTOR(fontsel);
    gtk_box_pack_start (GTK_BOX (hbox), fontsel, TRUE, TRUE, 0);
    gtk_widget_show (fontsel);
    gtk_widget_show(hbox);
    gtk_box_pack_start (GTK_BOX(vbox), hbox, TRUE, TRUE, 0);
    
    hbox = gtk_hbox_new(FALSE, 5);
    label = gtk_label_new(_("Fontsize:"));
    gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, TRUE, 0);
    gtk_widget_show (label);
    adj = (GtkAdjustment *) gtk_adjustment_new(0.1, 0.1, 10.0, 0.1, 0.0, 0.0);
    font_size = gtk_spin_button_new(adj, 1.0, 2);
    gtk_spin_button_set_wrap(GTK_SPIN_BUTTON(font_size), TRUE);
    gtk_spin_button_set_numeric(GTK_SPIN_BUTTON(font_size), TRUE);
    textobj_defaults_dialog->font_size = GTK_SPIN_BUTTON(font_size);
    gtk_box_pack_start(GTK_BOX (hbox), font_size, TRUE, TRUE, 0);
    gtk_widget_show (font_size);
    gtk_widget_show(hbox);
    gtk_box_pack_start (GTK_BOX(vbox), hbox, TRUE, TRUE, 0);

    gtk_widget_show (vbox);
  }

  dia_alignment_selector_set_alignment(textobj_defaults_dialog->alignment, default_properties.alignment);
  attributes_get_default_font(&font, &font_height);
  dia_font_selector_set_font(textobj_defaults_dialog->font, font);
  gtk_spin_button_set_value(textobj_defaults_dialog->font_size, font_height);
  
  return textobj_defaults_dialog->vbox;
}

static real
textobj_distance_from(Textobj *textobj, Point *point)
{
  return text_distance_from(textobj->text, point); 
}

static void
textobj_select(Textobj *textobj, Point *clicked_point,
	       Renderer *interactive_renderer)
{
  text_set_cursor(textobj->text, clicked_point, interactive_renderer);
  text_grab_focus(textobj->text, (Object *)textobj);
}

static void
textobj_move_handle(Textobj *textobj, Handle *handle,
		    Point *to, HandleMoveReason reason, ModifierKeys modifiers)
{
  assert(textobj!=NULL);
  assert(handle!=NULL);
  assert(to!=NULL);

  if (handle->id == HANDLE_TEXT) {
    text_set_position(textobj->text, to);
  }
  
  textobj_update_data(textobj);
}

static void
textobj_move(Textobj *textobj, Point *to)
{
  text_set_position(textobj->text, to);
  
  textobj_update_data(textobj);
}

static void
textobj_draw(Textobj *textobj, Renderer *renderer)
{
  assert(textobj != NULL);
  assert(renderer != NULL);

  text_draw(textobj->text, renderer);
}

static void
textobj_update_data(Textobj *textobj)
{
  Object *obj = &textobj->object;
  
  obj->position = textobj->text->position;
  
  text_calc_boundingbox(textobj->text, &obj->bounding_box);
  
  textobj->text_handle.pos = textobj->text->position;
}

static Object *
textobj_create(Point *startpoint,
	       void *user_data,
	       Handle **handle1,
	       Handle **handle2)
{
  Textobj *textobj;
  Object *obj;
  Color col;
  Font *font;
  real font_height;
  
  textobj = g_malloc(sizeof(Textobj));
  obj = &textobj->object;
  
  obj->type = &textobj_type;

  obj->ops = &textobj_ops;

  col = attributes_get_foreground();
  attributes_get_default_font(&font, &font_height);
  textobj->text = new_text("", font, font_height,
			   startpoint, &col, default_properties.alignment );
  
  object_init(obj, 1, 0);

  obj->handles[0] = &textobj->text_handle;
  textobj->text_handle.id = HANDLE_TEXT;
  textobj->text_handle.type = HANDLE_MAJOR_CONTROL;
  textobj->text_handle.connect_type = HANDLE_CONNECTABLE;
  textobj->text_handle.connected_to = NULL;

  textobj_update_data(textobj);

  *handle1 = NULL;
  *handle2 = obj->handles[0];
  return (Object *)textobj;
}

static void
textobj_destroy(Textobj *textobj)
{
  text_destroy(textobj->text);
  object_destroy(&textobj->object);
}

static Object *
textobj_copy(Textobj *textobj)
{
  Textobj *newtext;
  Object *obj, *newobj;
  
  obj = &textobj->object;
  
  newtext = g_malloc(sizeof(Textobj));
  newobj = &newtext->object;

  object_copy(obj, newobj);

  newtext->text = text_copy(textobj->text);

  newobj->handles[0] = &newtext->text_handle;
  
  newtext->text_handle = textobj->text_handle;
  newtext->text_handle.connected_to = NULL;

  return (Object *)newtext;
}

static void
textobj_save(Textobj *textobj, ObjectNode obj_node, const char *filename)
{
  object_save(&textobj->object, obj_node);

  data_add_text(new_attribute(obj_node, "text"),
		textobj->text);
}

static Object *
textobj_load(ObjectNode obj_node, int version, const char *filename)
{
  Textobj *textobj;
  Object *obj;
  AttributeNode attr;
  Point startpoint = {0.0, 0.0};

  textobj = g_malloc(sizeof(Textobj));
  obj = &textobj->object;
  
  obj->type = &textobj_type;
  obj->ops = &textobj_ops;

  object_load(obj, obj_node);

  attr = object_find_attribute(obj_node, "text");
  if (attr != NULL)
    textobj->text = data_text( attribute_first_data(attr) );
  else
    textobj->text = new_text("", font_getfont("Courier"), 1.0,
			     &startpoint, &color_black, ALIGN_CENTER);

  object_init(obj, 1, 0);

  obj->handles[0] = &textobj->text_handle;
  textobj->text_handle.id = HANDLE_TEXT;
  textobj->text_handle.type = HANDLE_MINOR_CONTROL;
  textobj->text_handle.connect_type = HANDLE_CONNECTABLE;
  textobj->text_handle.connected_to = NULL;

  textobj_update_data(textobj);

  return (Object *)textobj;
}