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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
 * All rights reserved.
 *
 * This file is part of the Gnome Library.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * published by the Free Software Foundation; either the
 *
 * 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 Lesser General Public License
 * License along with the Gnome Library; see the file COPYING.LIB.  If not,
 */
/*
  @NOTATION@
 */
/* Text item type for GnomeCanvas widget
 *
 * GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget.  Tk is
 * copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
 *
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx>
 * Port to Pango co-done by Gergõ Érdi <cactus@cactus.rulez.org>
 */

#ifndef GNOME_CANVAS_TEXT_H
#define GNOME_CANVAS_TEXT_H

#include <libgnomecanvas/gnome-canvas.h>

G_BEGIN_DECLS

/* Text item for the canvas.  Text items are positioned by an anchor point and an anchor direction.
 *
 * A clipping rectangle may be specified for the text.  The rectangle is anchored at the text's anchor
 * point, and is specified by clipping width and height parameters.  If the clipping rectangle is
 * enabled, it will clip the text.
 *
 * In addition, x and y offset values may be specified.  These specify an offset from the anchor
 * position.  If used in conjunction with the clipping rectangle, these could be used to implement
 * simple scrolling of the text within the clipping rectangle.
 *
 * Properties marked with [*] also have _set properties associated
 * with them, that determine if the specified value should be used
 * instead of the default (style-defined) values
 *
 * The following object arguments are available:
 *
 * name         type            read/write  description
 * ------------------------------------------------------------------------------------------
 * text         string          RW      The string of the text label
 * markup       string           W      A Pango markup string for the text label
 *
 * x            gdouble         RW      X coordinate of anchor point
 * y            gdouble         RW      Y coordinate of anchor point
 *
 * font         string           W      A string describing the font
 * font_desc        PangoFontDescription*   RW      Pointer to a PangoFontDescriptor
 * attributes           PangoAttrList*          RW      Pointer to a Pango attribute list
 * style        PangoStyle      RW      Pango style of font to use  [*]
 * variant      PangoVariant        RW      Pango variant of font to use    [*]
 * weight       gint            RW      Pango weight of font to use [*]
 * stretch      PangoStretch        RW      Pango stretch of font to use    [*]
 * size         gint            RW      Size (in pixels) of font    [*]
 * size_points      gdouble         RW      Size (in points) of font
 * scale                gdouble                  RW              Ratio to scale font        [*]
 *
 * justification    GtkJustification    RW      Justification for multiline text
 * clip_width       gdouble         RW      Width of clip rectangle
 * clip_height      gdouble         RW      Height of clip rectangle
 * clip         boolean         RW      Use clipping rectangle?
 * x_offset     gdouble         RW      Horizontal offset distance from anchor position
 * y_offset     gdouble         RW      Vertical offset distance from anchor position
 *
 * text_width       gdouble         R       Used to query the width of the rendered text
 * text_height      gdouble         R       Used to query the rendered height of the text
 *
 * fill_color       string           W      X color specification for text
 * fill_color_gdk   GdkColor*       RW      Pointer to an allocated GdkColor
 * fill_color_rgba  guint           RW      RGBA value used for AA color.
 */

#define GNOME_TYPE_CANVAS_TEXT            (gnome_canvas_text_get_type ())
#define GNOME_CANVAS_TEXT(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GNOME_TYPE_CANVAS_TEXT, GnomeCanvasText))
#define GNOME_CANVAS_TEXT_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GNOME_TYPE_CANVAS_TEXT, GnomeCanvasTextClass))
#define GNOME_IS_CANVAS_TEXT(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GNOME_TYPE_CANVAS_TEXT))
#define GNOME_IS_CANVAS_TEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GNOME_TYPE_CANVAS_TEXT))
#define GNOME_CANVAS_TEXT_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GNOME_TYPE_CANVAS_TEXT, GnomeCanvasTextClass))

typedef struct _GnomeCanvasText GnomeCanvasText;
typedef struct _GnomeCanvasTextClass GnomeCanvasTextClass;

struct _GnomeCanvasText {
    GnomeCanvasItem item;

    PangoFontDescription *font_desc; /* Font description for text */
    PangoAttrList *attr_list;        /* Attribute list of the text (caching) */
    PangoUnderline underline;
    gboolean       strikethrough;
    gint            rise;
    gdouble         scale;

    gchar *text;            /* Text to display */
        PangoLayout *layout;            /* The PangoLayout containing the text */

    gdouble x, y;           /* Position at anchor */

    gdouble clip_width;     /* Width of optional clip rectangle */
    gdouble clip_height;        /* Height of optional clip rectangle */

    gdouble xofs, yofs;     /* Text offset distance from anchor position */

    gdouble affine[6];               /* The item -> canvas affine */ /*AA */

    GtkJustification justification; /* Justification for text */

    gint cx, cy;            /* Top-left canvas coordinates for text */
    gint clip_cx, clip_cy;      /* Top-left canvas coordinates for clip rectangle */
    gint clip_cwidth, clip_cheight; /* Size of clip rectangle in pixels */
    gint max_width;         /* Maximum width of text lines */
    gint height;            /* Rendered text height in pixels */

        guint32 rgba;           /* RGBA color for text */ /*AA */

    guint clip : 1;         /* Use clip rectangle? */

    guint underline_set : 1;        /* Apply specified underline style? */
    guint strike_set    : 1;        /* Apply specified strikethrough style? */
    guint rise_set      : 1;        /* Apply specified ascension/descension? */

    guint scale_set     : 1;        /* Apply specified font scaling ratio? */
};

struct _GnomeCanvasTextClass {
    GnomeCanvasItemClass parent_class;
};

/* Standard Gtk function */
GType gnome_canvas_text_get_type (void) G_GNUC_CONST;

G_END_DECLS

#endif