/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * GimpText
 * Copyright (C) 2002-2003  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 <string.h>

#include <cairo.h>
#include <pango/pango.h>

#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"

#include "text-types.h"

#include "core/gimpmarshal.h"
#include "core/gimpstrokeoptions.h"
#include "core/gimp-utils.h"

#include "gimptext.h"


enum
{
  PROP_0,
  PROP_TEXT,
  PROP_MARKUP,
  PROP_FONT,
  PROP_FONT_SIZE,
  PROP_UNIT,
  PROP_ANTIALIAS,
  PROP_HINT_STYLE,
  PROP_KERNING,
  PROP_LANGUAGE,
  PROP_BASE_DIR,
  PROP_COLOR,
  PROP_OUTLINE,
  PROP_JUSTIFICATION,
  PROP_INDENTATION,
  PROP_LINE_SPACING,
  PROP_LETTER_SPACING,
  PROP_BOX_MODE,
  PROP_BOX_WIDTH,
  PROP_BOX_HEIGHT,
  PROP_BOX_UNIT,
  PROP_TRANSFORMATION,
  PROP_OFFSET_X,
  PROP_OFFSET_Y,
  PROP_BORDER,
  /* for backward compatibility */
  PROP_HINTING
};

enum
{
  CHANGED,
  LAST_SIGNAL
};


static void     gimp_text_finalize                    (GObject      *object);
static void     gimp_text_get_property                (GObject      *object,
                                                       guint         property_id,
                                                       GValue       *value,
                                                       GParamSpec   *pspec);
static void     gimp_text_set_property                (GObject      *object,
                                                       guint         property_id,
                                                       const GValue *value,
                                                       GParamSpec   *pspec);
static void     gimp_text_dispatch_properties_changed (GObject      *object,
                                                       guint         n_pspecs,
                                                       GParamSpec  **pspecs);
static gint64   gimp_text_get_memsize                 (GimpObject   *object,
                                                       gint64       *gui_size);


G_DEFINE_TYPE_WITH_CODE (GimpText, gimp_text, GIMP_TYPE_OBJECT,
                         G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG, NULL))

#define parent_class gimp_text_parent_class

static guint text_signals[LAST_SIGNAL] = { 0 };


static void
gimp_text_class_init (GimpTextClass *klass)
{
  GObjectClass    *object_class      = G_OBJECT_CLASS (klass);
  GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
  GimpRGB          black;
  GimpMatrix2      identity;
  gchar           *language;

  text_signals[CHANGED] =
    g_signal_new ("changed",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_FIRST,
                  G_STRUCT_OFFSET (GimpTextClass, changed),
                  NULL, NULL,
                  gimp_marshal_VOID__VOID,
                  G_TYPE_NONE, 0);

  object_class->finalize                    = gimp_text_finalize;
  object_class->get_property                = gimp_text_get_property;
  object_class->set_property                = gimp_text_set_property;
  object_class->dispatch_properties_changed = gimp_text_dispatch_properties_changed;

  gimp_object_class->get_memsize            = gimp_text_get_memsize;

  gimp_rgba_set (&black, 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE);
  gimp_matrix2_identity (&identity);

  language = gimp_get_default_language (NULL);

  GIMP_CONFIG_INSTALL_PROP_STRING (object_class, PROP_TEXT,
                                   "text", NULL,
                                   NULL,
                                   GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_STRING (object_class, PROP_MARKUP,
                                   "markup", NULL,
                                   NULL,
                                   GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_STRING (object_class, PROP_FONT,
                                   "font", NULL,
                                   "Sans",
                                   GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_FONT_SIZE,
                                   "font-size", NULL,
                                   0.0, 8192.0, 24.0,
                                   GIMP_PARAM_STATIC_STRINGS);
  /*
   *  We use the name "font-size-unit" for backward compatibility.
   *  The unit is also used for other sizes in the text object.
   */
  GIMP_CONFIG_INSTALL_PROP_UNIT (object_class, PROP_UNIT,
                                 "font-size-unit", NULL,
                                 TRUE, FALSE, GIMP_UNIT_PIXEL,
                                 GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_ANTIALIAS,
                                    "antialias", NULL,
                                    TRUE,
                                    GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_ENUM (object_class, PROP_HINT_STYLE,
                                "hint-style", NULL,
                                 GIMP_TYPE_TEXT_HINT_STYLE,
                                 GIMP_TEXT_HINT_STYLE_MEDIUM,
                                 GIMP_PARAM_STATIC_STRINGS |
                                 GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_KERNING,
                                    "kerning", NULL,
                                    FALSE,
                                    GIMP_PARAM_STATIC_STRINGS |
                                    GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_STRING (object_class, PROP_LANGUAGE,
                                   "language", NULL,
                                   language,
                                   GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_ENUM (object_class, PROP_BASE_DIR,
                                "base-direction", NULL,
                                 GIMP_TYPE_TEXT_DIRECTION,
                                 GIMP_TEXT_DIRECTION_LTR,
                                 GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_RGB (object_class, PROP_COLOR,
                                "color", NULL,
                                FALSE, &black,
                                GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_ENUM (object_class, PROP_OUTLINE,
                                "outline", NULL,
                                 GIMP_TYPE_TEXT_OUTLINE,
                                 GIMP_TEXT_OUTLINE_NONE,
                                 GIMP_PARAM_STATIC_STRINGS |
                                 GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_ENUM (object_class, PROP_JUSTIFICATION,
                                "justify", NULL,
                                 GIMP_TYPE_TEXT_JUSTIFICATION,
                                 GIMP_TEXT_JUSTIFY_LEFT,
                                 GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_INDENTATION,
                                   "indent", NULL,
                                   -8192.0, 8192.0, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_LINE_SPACING,
                                   "line-spacing", NULL,
                                   -8192.0, 8192.0, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_LETTER_SPACING,
                                   "letter-spacing", NULL,
                                   -8192.0, 8192.0, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_ENUM (object_class, PROP_BOX_MODE,
                                "box-mode",
                                 NULL,
                                 GIMP_TYPE_TEXT_BOX_MODE,
                                 GIMP_TEXT_BOX_DYNAMIC,
                                 GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_BOX_WIDTH,
                                   "box-width", NULL,
                                   0.0, GIMP_MAX_IMAGE_SIZE, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_BOX_HEIGHT,
                                   "box-height", NULL,
                                   0.0, GIMP_MAX_IMAGE_SIZE, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_UNIT (object_class, PROP_BOX_UNIT,
                                 "box-unit", NULL,
                                 TRUE, FALSE, GIMP_UNIT_PIXEL,
                                 GIMP_PARAM_STATIC_STRINGS);
  GIMP_CONFIG_INSTALL_PROP_MATRIX2 (object_class, PROP_TRANSFORMATION,
                                    "transformation", NULL,
                                    &identity,
                                    GIMP_PARAM_STATIC_STRINGS |
                                    GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_OFFSET_X,
                                   "offset-x", NULL,
                                   -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);
  GIMP_CONFIG_INSTALL_PROP_DOUBLE (object_class, PROP_OFFSET_Y,
                                   "offset-y", NULL,
                                   -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
                                   GIMP_PARAM_STATIC_STRINGS |
                                   GIMP_CONFIG_PARAM_DEFAULTS);

  /*  border does only exist to implement the old text API  */
  g_object_class_install_property (object_class, PROP_BORDER,
                                   g_param_spec_int ("border", NULL, NULL,
                                                     0, GIMP_MAX_IMAGE_SIZE, 0,
                                                     G_PARAM_CONSTRUCT |
                                                     GIMP_PARAM_WRITABLE));

  /*  the old hinting options have been replaced by 'hint-style'  */
  GIMP_CONFIG_INSTALL_PROP_BOOLEAN (object_class, PROP_HINTING,
                                    "hinting", NULL,
                                    TRUE,
                                    GIMP_PARAM_STATIC_STRINGS);

  g_free (language);
}

static void
gimp_text_init (GimpText *text)
{
}

static void
gimp_text_finalize (GObject *object)
{
  GimpText *text = GIMP_TEXT (object);

  if (text->text)
    {
      g_free (text->text);
      text->text = NULL;
    }
  if (text->markup)
    {
      g_free (text->markup);
      text->markup = NULL;
    }
  if (text->font)
    {
      g_free (text->font);
      text->font = NULL;
    }
  if (text->language)
    {
      g_free (text->language);
      text->language = NULL;
    }

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

static void
gimp_text_get_property (GObject      *object,
                        guint         property_id,
                        GValue       *value,
                        GParamSpec   *pspec)
{
  GimpText *text = GIMP_TEXT (object);

  switch (property_id)
    {
    case PROP_TEXT:
      g_value_set_string (value, text->text);
      break;
    case PROP_MARKUP:
      g_value_set_string (value, text->markup);
      break;
    case PROP_FONT:
      g_value_set_string (value, text->font);
      break;
    case PROP_FONT_SIZE:
      g_value_set_double (value, text->font_size);
      break;
    case PROP_UNIT:
      g_value_set_int (value, text->unit);
      break;
    case PROP_ANTIALIAS:
      g_value_set_boolean (value, text->antialias);
      break;
    case PROP_HINT_STYLE:
      g_value_set_enum (value, text->hint_style);
      break;
    case PROP_KERNING:
      g_value_set_boolean (value, text->kerning);
      break;
    case PROP_BASE_DIR:
      g_value_set_enum (value, text->base_dir);
      break;
    case PROP_LANGUAGE:
      g_value_set_string (value, text->language);
      break;
    case PROP_COLOR:
      g_value_set_boxed (value, &text->color);
      break;
    case PROP_OUTLINE:
      g_value_set_enum (value, text->outline);
      break;
    case PROP_JUSTIFICATION:
      g_value_set_enum (value, text->justify);
      break;
    case PROP_INDENTATION:
      g_value_set_double (value, text->indent);
      break;
    case PROP_LINE_SPACING:
      g_value_set_double (value, text->line_spacing);
      break;
    case PROP_LETTER_SPACING:
      g_value_set_double (value, text->letter_spacing);
      break;
    case PROP_BOX_MODE:
      g_value_set_enum (value, text->box_mode);
      break;
    case PROP_BOX_WIDTH:
      g_value_set_double (value, text->box_width);
      break;
    case PROP_BOX_HEIGHT:
      g_value_set_double (value, text->box_height);
      break;
    case PROP_BOX_UNIT:
      g_value_set_int (value, text->box_unit);
      break;
    case PROP_TRANSFORMATION:
      g_value_set_boxed (value, &text->transformation);
      break;
    case PROP_OFFSET_X:
      g_value_set_double (value, text->offset_x);
      break;
    case PROP_OFFSET_Y:
      g_value_set_double (value, text->offset_y);
      break;
    case PROP_HINTING:
      g_value_set_boolean (value,
                           text->hint_style != GIMP_TEXT_HINT_STYLE_NONE);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
gimp_text_set_property (GObject      *object,
                        guint         property_id,
                        const GValue *value,
                        GParamSpec   *pspec)
{
  GimpText    *text = GIMP_TEXT (object);
  GimpRGB     *color;
  GimpMatrix2 *matrix;

  switch (property_id)
    {
    case PROP_TEXT:
      g_free (text->text);
      text->text = g_value_dup_string (value);
      if (text->text && text->markup)
        {
          g_free (text->markup);
          text->markup = NULL;
          g_object_notify (object, "markup");
        }
      break;
    case PROP_MARKUP:
      g_free (text->markup);
      text->markup = g_value_dup_string (value);
      if (text->markup && text->text)
        {
          g_free (text->text);
          text->text = NULL;
          g_object_notify (object, "text");
        }
      break;
    case PROP_FONT:
      {
        const gchar *font = g_value_get_string (value);

        g_free (text->font);

        if (font)
          {
            gsize len = strlen (font);

            if (g_str_has_suffix (font, " Not-Rotated"))
              len -= strlen ( " Not-Rotated");

            text->font = g_strndup (font, len);
          }
        else
          {
            text->font = NULL;
          }
      }
      break;
    case PROP_FONT_SIZE:
      text->font_size = g_value_get_double (value);
      break;
    case PROP_UNIT:
      text->unit = g_value_get_int (value);
      break;
    case PROP_ANTIALIAS:
      text->antialias = g_value_get_boolean (value);
      break;
    case PROP_HINT_STYLE:
      text->hint_style = g_value_get_enum (value);
      break;
    case PROP_KERNING:
      text->kerning = g_value_get_boolean (value);
      break;
    case PROP_LANGUAGE:
      g_free (text->language);
      text->language = g_value_dup_string (value);
      break;
    case PROP_BASE_DIR:
      text->base_dir = g_value_get_enum (value);
      break;
    case PROP_COLOR:
      color = g_value_get_boxed (value);
      text->color = *color;
      break;
    case PROP_OUTLINE:
      text->outline = g_value_get_enum (value);
      break;
    case PROP_JUSTIFICATION:
      text->justify = g_value_get_enum (value);
      break;
    case PROP_INDENTATION:
      text->indent = g_value_get_double (value);
      break;
    case PROP_LINE_SPACING:
      text->line_spacing = g_value_get_double (value);
      break;
    case PROP_LETTER_SPACING:
      text->letter_spacing = g_value_get_double (value);
      break;
    case PROP_BOX_MODE:
      text->box_mode = g_value_get_enum (value);
      break;
    case PROP_BOX_WIDTH:
      text->box_width = g_value_get_double (value);
      break;
    case PROP_BOX_HEIGHT:
      text->box_height = g_value_get_double (value);
      break;
    case PROP_BOX_UNIT:
      text->box_unit = g_value_get_int (value);
      break;
    case PROP_TRANSFORMATION:
      matrix = g_value_get_boxed (value);
      text->transformation = *matrix;
      break;
    case PROP_OFFSET_X:
      text->offset_x = g_value_get_double (value);
      break;
    case PROP_OFFSET_Y:
      text->offset_y = g_value_get_double (value);
      break;
    case PROP_BORDER:
      text->border = g_value_get_int (value);
      break;
    case PROP_HINTING:
      /* interpret "hinting" only if "hint-style" has its default
       * value, so we don't overwrite a serialized new hint-style with
       * a compat "hinting" that is only there for old GIMP versions
       */
      if (text->hint_style == GIMP_TEXT_HINT_STYLE_MEDIUM)
        text->hint_style = (g_value_get_boolean (value) ?
                            GIMP_TEXT_HINT_STYLE_MEDIUM :
                            GIMP_TEXT_HINT_STYLE_NONE);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
gimp_text_dispatch_properties_changed (GObject     *object,
                                       guint        n_pspecs,
                                       GParamSpec **pspecs)
{
  G_OBJECT_CLASS (parent_class)->dispatch_properties_changed (object,
                                                              n_pspecs, pspecs);

  g_signal_emit (object, text_signals[CHANGED], 0);
}

static gint64
gimp_text_get_memsize (GimpObject *object,
                       gint64     *gui_size)
{
  GimpText *text    = GIMP_TEXT (object);
  gint64    memsize = 0;

  memsize += gimp_string_get_memsize (text->text);
  memsize += gimp_string_get_memsize (text->markup);
  memsize += gimp_string_get_memsize (text->font);
  memsize += gimp_string_get_memsize (text->language);

  return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
                                                                  gui_size);
}

void
gimp_text_get_transformation (GimpText    *text,
                              GimpMatrix3 *matrix)
{
  g_return_if_fail (GIMP_IS_TEXT (text));
  g_return_if_fail (matrix != NULL);

  matrix->coeff[0][0] = text->transformation.coeff[0][0];
  matrix->coeff[0][1] = text->transformation.coeff[0][1];
  matrix->coeff[0][2] = text->offset_x;

  matrix->coeff[1][0] = text->transformation.coeff[1][0];
  matrix->coeff[1][1] = text->transformation.coeff[1][1];
  matrix->coeff[1][2] = text->offset_y;

  matrix->coeff[2][0] = 0.0;
  matrix->coeff[2][1] = 0.0;
  matrix->coeff[2][1] = 1.0;
}