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/*
* Copyright © 2013 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, see <http://www.gnu.org/licenses/>.
*
* Authors: Alexander Larsson <alexl@gnome.org>
*/
#include "config.h"
#include "gtkcssimagescaledprivate.h"
#include "gtkstyleproviderprivate.h"
G_DEFINE_TYPE (GtkCssImageScaled, _gtk_css_image_scaled, GTK_TYPE_CSS_IMAGE)
static int
gtk_css_image_scaled_get_width (GtkCssImage *image)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
return _gtk_css_image_get_width (scaled->images[scaled->scale - 1]) / scaled->scale;
}
static int
gtk_css_image_scaled_get_height (GtkCssImage *image)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
return _gtk_css_image_get_height (scaled->images[scaled->scale - 1]) / scaled->scale;
}
static double
gtk_css_image_scaled_get_aspect_ratio (GtkCssImage *image)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
return _gtk_css_image_get_aspect_ratio (scaled->images[scaled->scale - 1]);
}
static void
gtk_css_image_scaled_draw (GtkCssImage *image,
cairo_t *cr,
double width,
double height)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
_gtk_css_image_draw (scaled->images[scaled->scale - 1], cr, width, height);
}
static void
gtk_css_image_scaled_print (GtkCssImage *image,
GString *string)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
int i;
g_string_append (string, "-gtk-scaled(");
for (i = 0; i < scaled->n_images; i++)
{
_gtk_css_image_print (scaled->images[i], string);
if (i != scaled->n_images - 1)
g_string_append (string, ",");
}
g_string_append (string, ")");
}
static void
gtk_css_image_scaled_dispose (GObject *object)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (object);
int i;
for (i = 0; i < scaled->n_images; i++)
g_object_unref (scaled->images[i]);
g_free (scaled->images);
scaled->images = NULL;
G_OBJECT_CLASS (_gtk_css_image_scaled_parent_class)->dispose (object);
}
static GtkCssImage *
gtk_css_image_scaled_compute (GtkCssImage *image,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
GtkCssImageScaled *copy;
int i, scale;
scale = _gtk_style_provider_private_get_scale (provider);
scale = MAX(MIN (scale, scaled->n_images), 1);
if (scaled->scale == scale)
return g_object_ref (scaled);
else
{
copy = g_object_new (_gtk_css_image_scaled_get_type (), NULL);
copy->scale = scale;
copy->n_images = scaled->n_images;
copy->images = g_new (GtkCssImage *, scaled->n_images);
for (i = 0; i < scaled->n_images; i++)
{
if (i == scale - 1)
copy->images[i] = _gtk_css_image_compute (scaled->images[i],
property_id,
provider,
style,
parent_style);
else
copy->images[i] = g_object_ref (scaled->images[i]);
}
return GTK_CSS_IMAGE (copy);
}
}
static gboolean
gtk_css_image_scaled_parse (GtkCssImage *image,
GtkCssParser *parser)
{
GtkCssImageScaled *scaled = GTK_CSS_IMAGE_SCALED (image);
GPtrArray *images;
GtkCssImage *child;
if (!_gtk_css_parser_try (parser, "-gtk-scaled", TRUE))
{
_gtk_css_parser_error (parser, "'-gtk-scaled'");
return FALSE;
}
if (!_gtk_css_parser_try (parser, "(", TRUE))
{
_gtk_css_parser_error (parser,
"Expected '(' after '-gtk-scaled'");
return FALSE;
}
images = g_ptr_array_new_with_free_func (g_object_unref);
do
{
child = _gtk_css_image_new_parse (parser);
if (child == NULL)
{
g_ptr_array_free (images, TRUE);
return FALSE;
}
g_ptr_array_add (images, child);
}
while ( _gtk_css_parser_try (parser, ",", TRUE));
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
g_ptr_array_free (images, TRUE);
_gtk_css_parser_error (parser,
"Expected ')' at end of '-gtk-scaled'");
return FALSE;
}
scaled->n_images = images->len;
scaled->images = (GtkCssImage **) g_ptr_array_free (images, FALSE);
return TRUE;
}
static void
_gtk_css_image_scaled_class_init (GtkCssImageScaledClass *klass)
{
GtkCssImageClass *image_class = GTK_CSS_IMAGE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_class->get_width = gtk_css_image_scaled_get_width;
image_class->get_height = gtk_css_image_scaled_get_height;
image_class->get_aspect_ratio = gtk_css_image_scaled_get_aspect_ratio;
image_class->draw = gtk_css_image_scaled_draw;
image_class->parse = gtk_css_image_scaled_parse;
image_class->compute = gtk_css_image_scaled_compute;
image_class->print = gtk_css_image_scaled_print;
object_class->dispose = gtk_css_image_scaled_dispose;
}
static void
_gtk_css_image_scaled_init (GtkCssImageScaled *image_scaled)
{
image_scaled->scale = 1;
}
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