evolution/widgets/text/e-text.h

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* EText - Text item for evolution.
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Author: Chris Lahey <clahey@umich.edu>
 *
 * A majority of code taken from:
 *
 * 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.
 *
 * Copyright (C) 1998 The Free Software Foundation
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx> */

#ifndef E_TEXT_H
#define E_TEXT_H

#include <gnome.h>
#include <gal/widgets/e-font.h>
#include <gal/util/e-text-event-processor.h>
#include <gal/e-text/e-text-model.h>


BEGIN_GNOME_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.
 *
 * The following object arguments are available:
 *
 * name			type			read/write	description
 * ------------------------------------------------------------------------------------------
 * text			string			RW		The string of the text label
 * font			string			W		X logical font descriptor
 * fontset		string			W		X logical fontset descriptor
 * font_gdk		GdkFont*		RW		Pointer to a GdkFont
 * anchor		GtkAnchorType		RW		Anchor side for the text
 * justification	GtkJustification	RW		Justification for multiline text
 * fill_color		string			W		X color specification for text
 * fill_color_gdk	GdkColor*		RW		Pointer to an allocated GdkColor
 * fill_stipple		GdkBitmap*		RW		Stipple pattern for filling the text
 * clip_width		double			RW		Width of clip rectangle
 * clip_height		double			RW		Height of clip rectangle
 * clip			boolean			RW		Use clipping rectangle?
 * fill_clip_rect       boolean                 RW              Whether the text item represents itself as being the size of the clipping rectangle.
 * x_offset		double			RW		Horizontal offset distance from anchor position
 * y_offset		double			RW		Vertical offset distance from anchor position
 * text_width		double			R		Used to query the width of the rendered text
 * text_height		double			R		Used to query the rendered height of the text
 * width                double                  RW              A synonym for clip_width
 * height               double                  R               A synonym for text_height
 *
 * These are currently ignored in the AA version:
 * editable             boolean                 RW              Can this item be edited
 * use_ellipsis         boolean                 RW              Whether to use ellipsises if text gets cut off.  Meaningless if clip == false.
 * ellipsis             string                  RW              The characters to use as ellipsis.  NULL = "...".
 * line_wrap            boolean                 RW              Line wrap when not editing.
 * break_characters     string                  RW              List of characters to optionally break on.
 * max_lines            int                     RW              Number of lines possible when doing line wrap.
 * draw_borders         boolean                 RW              Whether to draw borders.
 * draw_background      boolean                 RW              Whether to draw the background.
 */

#define E_TYPE_TEXT            (e_text_get_type ())
#define E_TEXT(obj)            (GTK_CHECK_CAST ((obj), E_TYPE_TEXT, EText))
#define E_TEXT_CLASS(klass)    (GTK_CHECK_CLASS_CAST ((klass), E_TYPE_TEXT, ETextClass))
#define E_IS_TEXT(obj)         (GTK_CHECK_TYPE ((obj), E_TYPE_TEXT))
#define E_IS_TEXT_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), E_TYPE_TEXT))


typedef struct _EText EText;
typedef struct _ETextClass ETextClass;

#if 0
typedef struct _ETextSuckFont ETextSuckFont;
typedef struct _ETextSuckChar ETextSuckChar;

struct _ETextSuckChar {
	int     left_sb;
	int     right_sb;
	int     width;
	int     ascent;
	int     descent;
	int     bitmap_offset; /* in pixels */
};

struct _ETextSuckFont {
	guchar *bitmap;
	gint    bitmap_width;
	gint    bitmap_height;
	gint    ascent;
	ETextSuckChar chars[256];
};
#endif

struct _EText {
	GnomeCanvasItem item;
	
	ETextModel *model;
	gint model_changed_signal_id;
	gint model_repos_signal_id;

	const gchar *text;              /* Text to display --- from the ETextModel */
	gpointer lines;			/* Text split into lines (private field) */
	int num_lines;			/* Number of lines of text */

#if 0
	GdkFont *font;			/* Font for text */
#else
	EFont *font;
#endif
	GtkAnchorType anchor;		/* Anchor side for text */
	GtkJustification justification;	/* Justification for text */

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

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

	GdkColor color; 		/* Fill color */
	GdkBitmap *stipple;		/* Stipple for text */
	GdkGC *gc;			/* GC for drawing text */

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

	guint clip : 1;			/* Use clip rectangle? */
	guint fill_clip_rectangle : 1;  /* Fill the clipping rectangle. */

	/* Antialiased specific stuff follows */
#if 0
	ETextSuckFont *suckfont; /* Sucked font */
#endif
	guint32 rgba;			/* RGBA color for text */
	double affine[6];               /* The item -> canvas affine */

	char *ellipsis;                 /* The ellipsis characters.  NULL = "...". */
	double ellipsis_width;          /* The width of the ellipsis. */
	gboolean use_ellipsis;          /* Whether to use the ellipsis. */

	gboolean editable;              /* Item is editable */
	gboolean editing;               /* Item is currently being edited */

	int xofs_edit;                  /* Offset because of editing */
	int yofs_edit;                  /* Offset because of editing */

	/* This needs to be reworked a bit once we get line wrapping. */
	int selection_start;            /* Start of selection IN BYTES */
	int selection_end;              /* End of selection IN BYTES */
	gboolean select_by_word;        /* Current selection is by word */

	/* This section is for drag scrolling and blinking cursor. */
	gint timeout_id;                /* Current timeout id for scrolling */
	GTimer *timer;                  /* Timer for blinking cursor and scrolling */

	gint lastx, lasty;              /* Last x and y motion events */
	gint last_state;                /* Last state */
	gulong scroll_start;            /* Starting time for scroll (microseconds) */

	gint show_cursor;               /* Is cursor currently shown */
	gboolean button_down;           /* Is mouse button 1 down */

	ETextEventProcessor *tep;       /* Text Event Processor */
	gint tep_command_id;

	GtkWidget *invisible;           /* For selection handling */
	gboolean has_selection;         /* TRUE if we have the selection */
	gchar *primary_selection;       /* Primary selection text */
	gint primary_length;            /* Primary selection text length */
	gchar *clipboard_selection;     /* Clipboard selection text */
	gint clipboard_length;          /* Clipboard selection text length*/

	guint pointer_in : 1;           /* Is the pointer currently over us? */
	guint default_cursor_shown : 1; /* Is the default cursor currently shown? */
	guint draw_borders : 1;         /* Draw borders? */
	guint draw_background : 1;      /* Draw background? */

	guint line_wrap : 1;            /* Do line wrap */
	gchar *break_characters;        /* Characters to optionally break after */

	gint max_lines;                 /* Max number of lines (-1 = infinite) */

	GdkCursor *default_cursor;      /* Default cursor (arrow) */
	GdkCursor *i_cursor;            /* I beam cursor */

	gint tooltip_timeout;           /* Timeout for the tooltip */
	GtkWidget *tooltip_window;      /* GtkWindow for displaying the tooltip */
	gint tooltip_count;             /* GDK_ENTER_NOTIFY count. */

	guint needs_redraw : 1;         /* Needs redraw */
	guint needs_recalc_bounds : 1;  /* Need recalc_bounds */
	guint needs_calc_height : 1;    /* Need calc_height */
	guint needs_calc_line_widths : 1; /* Needs calc_line_widths */
	guint needs_split_into_lines : 1; /* Needs split_into_lines */

	gint dbl_timeout;               /* Double click timeout */
	gint tpl_timeout;               /* Triple click timeout */
};

struct _ETextClass {
	GnomeCanvasItemClass parent_class;

	void (* changed) (EText *text);
	void (* activate) (EText *text);
};


/* Standard Gtk function */
GtkType e_text_get_type (void);


END_GNOME_DECLS

#endif