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css: Add GtkCssImage class

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Doesn't do anything yet, just exists.
This commit is contained in:
Benjamin Otte
2011-12-19 22:11:20 +01:00
parent 9181282d88
commit b3389a017a
3 changed files with 279 additions and 0 deletions
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2
gtk/Makefile.am
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@ -412,6 +412,7 @@ gtk_private_h_sources = \
gtkcellareaboxcontextprivate.h \
gtkcontainerprivate.h \
gtkcsscustompropertyprivate.h \
gtkcssimageprivate.h \
gtkcsslookupprivate.h \
gtkcssparserprivate.h \
gtkcssproviderprivate.h \
@ -589,6 +590,7 @@ gtk_base_c_sources = \
gtkcomboboxtext.c \
gtkcontainer.c \
gtkcsscustomproperty.c \
gtkcssimage.c \
gtkcsslookup.c \
gtkcssparser.c \
gtkcssprovider.c \

179
gtk/gtkcssimage.c Normal file
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@ -0,0 +1,179 @@
/*
* Copyright © 2011 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkcssimageprivate.h"
G_DEFINE_ABSTRACT_TYPE (GtkCssImage, _gtk_css_image, G_TYPE_OBJECT)
static int
gtk_css_image_real_get_width (GtkCssImage *image)
{
return 0;
}
static int
gtk_css_image_real_get_height (GtkCssImage *image)
{
return 0;
}
static double
gtk_css_image_real_get_aspect_ratio (GtkCssImage *image)
{
int width, height;
width = _gtk_css_image_get_width (image);
height = _gtk_css_image_get_height (image);
if (width && height)
return (double) width / height;
else
return 0;
}
static GtkCssImage *
gtk_css_image_real_compute (GtkCssImage *image,
GtkStyleContext *context)
{
return g_object_ref (image);
}
static void
_gtk_css_image_class_init (GtkCssImageClass *klass)
{
klass->get_width = gtk_css_image_real_get_width;
klass->get_height = gtk_css_image_real_get_height;
klass->get_aspect_ratio = gtk_css_image_real_get_aspect_ratio;
klass->compute = gtk_css_image_real_compute;
}
static void
_gtk_css_image_init (GtkCssImage *image)
{
}
int
_gtk_css_image_get_width (GtkCssImage *image)
{
GtkCssImageClass *klass;
g_return_val_if_fail (GTK_IS_CSS_IMAGE (image), 0);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
return klass->get_width (image);
}
int
_gtk_css_image_get_height (GtkCssImage *image)
{
GtkCssImageClass *klass;
g_return_val_if_fail (GTK_IS_CSS_IMAGE (image), 0);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
return klass->get_height (image);
}
double
_gtk_css_image_get_aspect_ratio (GtkCssImage *image)
{
GtkCssImageClass *klass;
g_return_val_if_fail (GTK_IS_CSS_IMAGE (image), 0);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
return klass->get_aspect_ratio (image);
}
GtkCssImage *
_gtk_css_image_compute (GtkCssImage *image,
GtkStyleContext *context)
{
GtkCssImageClass *klass;
g_return_val_if_fail (GTK_IS_CSS_IMAGE (image), NULL);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
return klass->compute (image, context);
}
void
_gtk_css_image_draw (GtkCssImage *image,
cairo_t *cr,
double width,
double height)
{
GtkCssImageClass *klass;
g_return_if_fail (GTK_IS_CSS_IMAGE (image));
g_return_if_fail (cr != NULL);
cairo_save (cr);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
klass->draw (image, cr, width, height);
cairo_restore (cr);
}
void
_gtk_css_image_print (GtkCssImage *image,
GString *string)
{
GtkCssImageClass *klass;
g_return_if_fail (GTK_IS_CSS_IMAGE (image));
g_return_if_fail (string != NULL);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
klass->print (image, string);
}
GtkCssImage *
_gtk_css_image_new_parse (GtkCssParser *parser,
GFile *base)
{
GtkCssImage *image;
GtkCssImageClass *klass;
g_return_val_if_fail (parser != NULL, NULL);
g_return_val_if_fail (G_IS_FILE (base), NULL);
image = g_object_new (GTK_TYPE_CSS_IMAGE, NULL);
klass = GTK_CSS_IMAGE_GET_CLASS (image);
if (!klass->parse (image, parser, base))
{
g_object_unref (image);
return NULL;
}
return image;
}

98
gtk/gtkcssimageprivate.h Normal file
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@ -0,0 +1,98 @@
/*
* Copyright © 2011 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#ifndef __GTK_CSS_IMAGE_PRIVATE_H__
#define __GTK_CSS_IMAGE_PRIVATE_H__
#include <cairo.h>
#include <glib-object.h>
#include "gtk/gtkstylecontext.h"
#include "gtk/gtkcssparserprivate.h"
G_BEGIN_DECLS
#define GTK_TYPE_CSS_IMAGE (_gtk_css_image_get_type ())
#define GTK_CSS_IMAGE(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE, GtkCssImage))
#define GTK_CSS_IMAGE_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
#define GTK_IS_CSS_IMAGE(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE))
#define GTK_IS_CSS_IMAGE_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE))
#define GTK_CSS_IMAGE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE, GtkCssImageClass))
typedef struct _GtkCssImage GtkCssImage;
typedef struct _GtkCssImageClass GtkCssImageClass;
struct _GtkCssImage
{
GObject parent;
};
struct _GtkCssImageClass
{
GObjectClass parent_class;
/* width of image or 0 if it has no width (optional) */
int (* get_width) (GtkCssImage *image);
/* height of image or 0 if it has no height (optional) */
int (* get_height) (GtkCssImage *image);
/* aspect ratio (width / height) of image or 0 if it has no aspect ratio (optional) */
double (* get_aspect_ratio) (GtkCssImage *image);
/* create "computed value" in CSS terms, returns a new reference */
GtkCssImage *(* compute) (GtkCssImage *image,
GtkStyleContext *context);
/* draw to 0,0 with the given width and height */
void (* draw) (GtkCssImage *image,
cairo_t *cr,
double width,
double height);
/* parse CSS, return TRUE on success */
gboolean (* parse) (GtkCssImage *image,
GtkCssParser *parser,
GFile *base);
/* print to CSS */
void (* print) (GtkCssImage *image,
GString *string);
};
GType _gtk_css_image_get_type (void) G_GNUC_CONST;
GtkCssImage * _gtk_css_image_new_parse (GtkCssParser *parser,
GFile *base);
int _gtk_css_image_get_width (GtkCssImage *image);
int _gtk_css_image_get_height (GtkCssImage *image);
double _gtk_css_image_get_aspect_ratio (GtkCssImage *image);
GtkCssImage * _gtk_css_image_compute (GtkCssImage *image,
GtkStyleContext *context);
void _gtk_css_image_draw (GtkCssImage *image,
cairo_t *cr,
double width,
double height);
void _gtk_css_image_print (GtkCssImage *image,
GString *string);
G_END_DECLS
#endif /* __GTK_CSS_IMAGE_PRIVATE_H__ */