Commit f7eea0b8 authored by Benjamin Otte's avatar Benjamin Otte

cssimage: Add GtkCssImageGradient

parent 8f42f8c5
......@@ -412,6 +412,7 @@ gtk_private_h_sources = \
gtkcellareaboxcontextprivate.h \
gtkcontainerprivate.h \
gtkcsscustompropertyprivate.h \
gtkcssimagegradientprivate.h \
gtkcssimageprivate.h \
gtkcssimageurlprivate.h \
gtkcsslookupprivate.h \
......@@ -592,6 +593,7 @@ gtk_base_c_sources = \
gtkcontainer.c \
gtkcsscustomproperty.c \
gtkcssimage.c \
gtkcssimagegradient.c \
gtkcssimageurl.c \
gtkcsslookup.c \
gtkcssparser.c \
......
......@@ -23,6 +23,7 @@
#include "gtkcssimageprivate.h"
/* for the types only */
#include "gtk/gtkcssimagegradientprivate.h"
#include "gtk/gtkcssimageurlprivate.h"
G_DEFINE_ABSTRACT_TYPE (GtkCssImage, _gtk_css_image, G_TYPE_OBJECT)
......@@ -166,7 +167,8 @@ _gtk_css_image_new_parse (GtkCssParser *parser,
const char *prefix;
GType (* type_func) (void);
} image_types[] = {
{ "url", _gtk_css_image_url_get_type }
{ "url", _gtk_css_image_url_get_type },
{ "-gtk-gradient", _gtk_css_image_gradient_get_type }
};
guint i;
......
/*
* 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 "gtkcssimagegradientprivate.h"
#include "gtkcssprovider.h"
G_DEFINE_TYPE (GtkCssImageGradient, _gtk_css_image_gradient, GTK_TYPE_CSS_IMAGE)
static GtkCssImage *
gtk_css_image_gradient_compute (GtkCssImage *image,
GtkStyleContext *context)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
GtkCssImageGradient *copy;
if (gradient->pattern)
return g_object_ref (gradient);
copy = g_object_new (GTK_TYPE_CSS_IMAGE_GRADIENT, NULL);
copy->gradient = gtk_gradient_ref (gradient->gradient);
copy->pattern = gtk_gradient_resolve_for_context (copy->gradient, context);
return GTK_CSS_IMAGE (copy);
}
static void
gtk_css_image_gradient_draw (GtkCssImage *image,
cairo_t *cr,
double width,
double height)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
if (!gradient->pattern)
{
g_warning ("trying to paint unresolved gradient");
return;
}
cairo_scale (cr, width, height);
cairo_rectangle (cr, 0, 0, 1, 1);
cairo_set_source (cr, gradient->pattern);
cairo_fill (cr);
}
static gboolean
gtk_css_image_gradient_parse (GtkCssImage *image,
GtkCssParser *parser,
GFile *base)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
gradient->gradient = _gtk_gradient_parse (parser);
return gradient->gradient != NULL;
}
static void
gtk_css_image_gradient_print (GtkCssImage *image,
GString *string)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (image);
char *s;
s = gtk_gradient_to_string (gradient->gradient);
g_string_append (string, s);
g_free (s);
}
static void
gtk_css_image_gradient_dispose (GObject *object)
{
GtkCssImageGradient *gradient = GTK_CSS_IMAGE_GRADIENT (object);
if (gradient->gradient)
{
gtk_gradient_unref (gradient->gradient);
gradient->gradient = NULL;
}
if (gradient->pattern)
{
cairo_pattern_destroy (gradient->pattern);
gradient->pattern = NULL;
}
G_OBJECT_CLASS (_gtk_css_image_gradient_parent_class)->dispose (object);
}
static void
_gtk_css_image_gradient_class_init (GtkCssImageGradientClass *klass)
{
GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_class->compute = gtk_css_image_gradient_compute;
image_class->draw = gtk_css_image_gradient_draw;
image_class->parse = gtk_css_image_gradient_parse;
image_class->print = gtk_css_image_gradient_print;
object_class->dispose = gtk_css_image_gradient_dispose;
}
static void
_gtk_css_image_gradient_init (GtkCssImageGradient *image_gradient)
{
}
GtkGradient *
_gtk_gradient_parse (GtkCssParser *parser)
{
GtkGradient *gradient;
cairo_pattern_type_t type;
gdouble coords[6];
guint i;
g_return_val_if_fail (parser != NULL, NULL);
if (!_gtk_css_parser_try (parser, "-gtk-gradient", TRUE))
{
_gtk_css_parser_error (parser,
"Expected '-gtk-gradient'");
return NULL;
}
if (!_gtk_css_parser_try (parser, "(", TRUE))
{
_gtk_css_parser_error (parser,
"Expected '(' after '-gtk-gradient'");
return NULL;
}
/* Parse gradient type */
if (_gtk_css_parser_try (parser, "linear", TRUE))
type = CAIRO_PATTERN_TYPE_LINEAR;
else if (_gtk_css_parser_try (parser, "radial", TRUE))
type = CAIRO_PATTERN_TYPE_RADIAL;
else
{
_gtk_css_parser_error (parser,
"Gradient type must be 'radial' or 'linear'");
return NULL;
}
/* Parse start/stop position parameters */
for (i = 0; i < 2; i++)
{
if (! _gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_parser_error (parser,
"Expected ','");
return NULL;
}
if (_gtk_css_parser_try (parser, "left", TRUE))
coords[i * 3] = 0;
else if (_gtk_css_parser_try (parser, "right", TRUE))
coords[i * 3] = 1;
else if (_gtk_css_parser_try (parser, "center", TRUE))
coords[i * 3] = 0.5;
else if (!_gtk_css_parser_try_double (parser, &coords[i * 3]))
{
_gtk_css_parser_error (parser,
"Expected a valid X coordinate");
return NULL;
}
if (_gtk_css_parser_try (parser, "top", TRUE))
coords[i * 3 + 1] = 0;
else if (_gtk_css_parser_try (parser, "bottom", TRUE))
coords[i * 3 + 1] = 1;
else if (_gtk_css_parser_try (parser, "center", TRUE))
coords[i * 3 + 1] = 0.5;
else if (!_gtk_css_parser_try_double (parser, &coords[i * 3 + 1]))
{
_gtk_css_parser_error (parser,
"Expected a valid Y coordinate");
return NULL;
}
if (type == CAIRO_PATTERN_TYPE_RADIAL)
{
/* Parse radius */
if (! _gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_parser_error (parser,
"Expected ','");
return NULL;
}
if (! _gtk_css_parser_try_double (parser, &coords[(i * 3) + 2]))
{
_gtk_css_parser_error (parser,
"Expected a numer for the radius");
return NULL;
}
}
}
if (type == CAIRO_PATTERN_TYPE_LINEAR)
gradient = gtk_gradient_new_linear (coords[0], coords[1], coords[3], coords[4]);
else
gradient = gtk_gradient_new_radial (coords[0], coords[1], coords[2],
coords[3], coords[4], coords[5]);
while (_gtk_css_parser_try (parser, ",", TRUE))
{
GtkSymbolicColor *color;
gdouble position;
if (_gtk_css_parser_try (parser, "from", TRUE))
{
position = 0;
if (!_gtk_css_parser_try (parser, "(", TRUE))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected '('");
return NULL;
}
}
else if (_gtk_css_parser_try (parser, "to", TRUE))
{
position = 1;
if (!_gtk_css_parser_try (parser, "(", TRUE))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected '('");
return NULL;
}
}
else if (_gtk_css_parser_try (parser, "color-stop", TRUE))
{
if (!_gtk_css_parser_try (parser, "(", TRUE))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected '('");
return NULL;
}
if (!_gtk_css_parser_try_double (parser, &position))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected a valid number");
return NULL;
}
if (!_gtk_css_parser_try (parser, ",", TRUE))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected a comma");
return NULL;
}
}
else
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Not a valid color-stop definition");
return NULL;
}
color = _gtk_css_parser_read_symbolic_color (parser);
if (color == NULL)
{
gtk_gradient_unref (gradient);
return NULL;
}
gtk_gradient_add_color_stop (gradient, position, color);
gtk_symbolic_color_unref (color);
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected ')'");
return NULL;
}
}
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
gtk_gradient_unref (gradient);
_gtk_css_parser_error (parser,
"Expected ')'");
return NULL;
}
return gradient;
}
/*
* 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_GRADIENT_PRIVATE_H__
#define __GTK_CSS_IMAGE_GRADIENT_PRIVATE_H__
#include "gtk/gtkcssimageprivate.h"
#include <gtk/gtkgradient.h>
G_BEGIN_DECLS
#define GTK_TYPE_CSS_IMAGE_GRADIENT (_gtk_css_image_gradient_get_type ())
#define GTK_CSS_IMAGE_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_IMAGE_GRADIENT, GtkCssImageGradient))
#define GTK_CSS_IMAGE_GRADIENT_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_IMAGE_GRADIENT, GtkCssImageGradientClass))
#define GTK_IS_CSS_IMAGE_GRADIENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_IMAGE_GRADIENT))
#define GTK_IS_CSS_IMAGE_GRADIENT_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_IMAGE_GRADIENT))
#define GTK_CSS_IMAGE_GRADIENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_IMAGE_GRADIENT, GtkCssImageGradientClass))
typedef struct _GtkCssImageGradient GtkCssImageGradient;
typedef struct _GtkCssImageGradientClass GtkCssImageGradientClass;
struct _GtkCssImageGradient
{
GtkCssImage parent;
GtkGradient *gradient;
cairo_pattern_t *pattern; /* the resolved gradient */
};
struct _GtkCssImageGradientClass
{
GtkCssImageClass parent_class;
};
GType _gtk_css_image_gradient_get_type (void) G_GNUC_CONST;
/* for lack of a better place to put it */
GtkGradient * _gtk_gradient_parse (GtkCssParser *parser);
G_END_DECLS
#endif /* __GTK_CSS_IMAGE_GRADIENT_PRIVATE_H__ */
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