gtk2/gtk/gtktextattributes.h
Tristan Van Berkom d399a4acab Added GdkRGBA properties to GtkTextTag.
This now allows text view to render text with alpha values in
the text foreground and backgrounds, the work is almost complete,
currently the error-underline-color is still a GdkColor style property
and since we use only GdkRGBA for rendering it needs to be converted
and applied, probably a new rgba version of the style property should
also be introduced.

This commit adds tests/testtextview that must be run from the tests/
directory to show translucent text in action.
2011-05-06 17:05:10 -04:00

181 lines
5.6 KiB
C

/* gtktexttag.c - text tag object
*
* Copyright (c) 1992-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
* Copyright (c) 2000 Red Hat, Inc.
* Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
*
* This software is copyrighted by the Regents of the University of
* California, Sun Microsystems, Inc., and other parties. The
* following terms apply to all files associated with the software
* unless explicitly disclaimed in individual files.
*
* The authors hereby grant permission to use, copy, modify,
* distribute, and license this software and its documentation for any
* purpose, provided that existing copyright notices are retained in
* all copies and that this notice is included verbatim in any
* distributions. No written agreement, license, or royalty fee is
* required for any of the authorized uses. Modifications to this
* software may be copyrighted by their authors and need not follow
* the licensing terms described here, provided that the new terms are
* clearly indicated on the first page of each file where they apply.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* GOVERNMENT USE: If you are acquiring this software on behalf of the
* U.S. government, the Government shall have only "Restricted Rights"
* in the software and related documentation as defined in the Federal
* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
* are acquiring the software on behalf of the Department of Defense,
* the software shall be classified as "Commercial Computer Software"
* and the Government shall have only "Restricted Rights" as defined
* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
* foregoing, the authors grant the U.S. Government and others acting
* in its behalf permission to use and distribute the software in
* accordance with the terms specified in this license.
*
*/
#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gtk/gtk.h> can be included directly."
#endif
#ifndef __GTK_TEXT_ATTRIBUTES_H__
#define __GTK_TEXT_ATTRIBUTES_H__
#include <gdk/gdk.h>
#include <gtk/gtkenums.h>
G_BEGIN_DECLS
typedef struct _GtkTextAttributes GtkTextAttributes;
#define GTK_TYPE_TEXT_ATTRIBUTES (gtk_text_attributes_get_type ())
typedef struct _GtkTextAppearance GtkTextAppearance;
/**
* GtkTextAttributes:
*
* Using #GtkTextAttributes directly should rarely be necessary.
* It's primarily useful with gtk_text_iter_get_attributes().
* As with most GTK+ structs, the fields in this struct should only
* be read, never modified directly.
*/
struct _GtkTextAppearance
{
/*< public >*/
GdkColor bg_color;
GdkColor fg_color;
/* super/subscript rise, can be negative */
gint rise;
/*< public >*/
guint underline : 4; /* PangoUnderline */
guint strikethrough : 1;
/* Whether to use background-related values; this is irrelevant for
* the values struct when in a tag, but is used for the composite
* values struct; it's true if any of the tags being composited
* had background stuff set.
*/
guint draw_bg : 1;
/* These are only used when we are actually laying out and rendering
* a paragraph; not when a GtkTextAppearance is part of a
* GtkTextAttributes.
*/
guint inside_selection : 1;
guint is_text : 1;
GdkRGBA *rgba[2];
#if __SIZEOF_INT__ == __SIZEOF_POINTER__
/* unusable, just for ABI compat */
guint padding[2];
#endif
};
struct _GtkTextAttributes
{
/*< private >*/
guint refcount;
/*< public >*/
GtkTextAppearance appearance;
GtkJustification justification;
GtkTextDirection direction;
/* Individual chunks of this can be set/unset as a group */
PangoFontDescription *font;
gdouble font_scale;
gint left_margin;
gint right_margin;
gint indent;
gint pixels_above_lines;
gint pixels_below_lines;
gint pixels_inside_wrap;
PangoTabArray *tabs;
GtkWrapMode wrap_mode; /* How to handle wrap-around for this tag.
* Must be GTK_WRAPMODE_CHAR,
* GTK_WRAPMODE_NONE, GTK_WRAPMODE_WORD
*/
PangoLanguage *language;
/*< private >*/
GdkColor *pg_bg_color;
/*< public >*/
/* hide the text */
guint invisible : 1;
/* Background is fit to full line height rather than
* baseline +/- ascent/descent (font height)
*/
guint bg_full_height : 1;
/* can edit this text */
guint editable : 1;
/*< private >*/
GdkRGBA *pg_bg_rgba;
guint padding[3];
};
GtkTextAttributes* gtk_text_attributes_new (void);
GtkTextAttributes* gtk_text_attributes_copy (GtkTextAttributes *src);
void gtk_text_attributes_copy_values (GtkTextAttributes *src,
GtkTextAttributes *dest);
void gtk_text_attributes_unref (GtkTextAttributes *values);
GtkTextAttributes *gtk_text_attributes_ref (GtkTextAttributes *values);
GType gtk_text_attributes_get_type (void) G_GNUC_CONST;
G_END_DECLS
#endif