gtk2/gtk/gtkcsstypes.c
2012-03-17 05:13:22 +01:00

160 lines
4.7 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Benjamin Otte <otte@gnome.org>
*
* 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 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/>.
*/
#include "config.h"
#include "gtkcsstypesprivate.h"
#include "gtkstylecontextprivate.h"
#define DEFINE_BOXED_TYPE_WITH_COPY_FUNC(TypeName, type_name) \
\
static TypeName * \
type_name ## _copy (const TypeName *foo) \
{ \
return g_memdup (foo, sizeof (TypeName)); \
} \
\
G_DEFINE_BOXED_TYPE (TypeName, type_name, type_name ## _copy, g_free)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssBackgroundSize, _gtk_css_background_size)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssBackgroundPosition, _gtk_css_background_position)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssBorderCornerRadius, _gtk_css_border_corner_radius)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssBorderImageRepeat, _gtk_css_border_image_repeat)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssNumber, _gtk_css_number)
void
_gtk_css_number_init (GtkCssNumber *number,
double value,
GtkCssUnit unit)
{
number->value = value;
number->unit = unit;
}
gboolean
_gtk_css_number_equal (const GtkCssNumber *one,
const GtkCssNumber *two)
{
return one->unit == two->unit &&
one->value == two->value;
}
double
_gtk_css_number_get (const GtkCssNumber *number,
double one_hundred_percent)
{
if (number->unit == GTK_CSS_PERCENT)
return number->value * one_hundred_percent * 0.01;
else
return number->value;
}
gboolean
_gtk_css_number_compute (GtkCssNumber *dest,
const GtkCssNumber *src,
GtkStyleContext *context)
{
switch (src->unit)
{
default:
g_assert_not_reached();
/* fall through */
case GTK_CSS_PERCENT:
case GTK_CSS_NUMBER:
case GTK_CSS_PX:
case GTK_CSS_DEG:
dest->value = src->value;
dest->unit = src->unit;
break;
case GTK_CSS_PT:
dest->value = src->value * 96.0 / 72.0;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_PC:
dest->value = src->value * 96.0 / 72.0 * 12.0;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_IN:
dest->value = src->value * 96.0;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_CM:
dest->value = src->value * 96.0 * 0.39370078740157477;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_MM:
dest->value = src->value * 96.0 * 0.039370078740157477;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_EM:
dest->value = src->value * _gtk_css_value_get_double (_gtk_style_context_peek_property (context, "font-size"));
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_EX:
/* for now we pretend ex is half of em */
dest->value = src->value * _gtk_css_value_get_double (_gtk_style_context_peek_property (context, "font-size"));
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_RAD:
dest->value = 360 * src->value / (2 * G_PI);
dest->unit = GTK_CSS_DEG;
break;
case GTK_CSS_GRAD:
dest->value = 360 * src->value / 400.0;
dest->unit = GTK_CSS_DEG;
break;
case GTK_CSS_TURN:
dest->value = 360 * src->value;
dest->unit = GTK_CSS_DEG;
break;
}
return !_gtk_css_number_equal (src, dest);
}
void
_gtk_css_number_print (const GtkCssNumber *number,
GString *string)
{
char buf[G_ASCII_DTOSTR_BUF_SIZE];
const char *names[] = {
/* [GTK_CSS_NUMBER] = */ "",
/* [GTK_CSS_PERCENT] = */ "%",
/* [GTK_CSS_PX] = */ "px",
/* [GTK_CSS_PT] = */ "pt",
/* [GTK_CSS_EM] = */ "em",
/* [GTK_CSS_EX] = */ "ex",
/* [GTK_CSS_PC] = */ "pc",
/* [GTK_CSS_IN] = */ "in",
/* [GTK_CSS_CM] = */ "cm",
/* [GTK_CSS_MM] = */ "mm",
/* [GTK_CSS_RAD] = */ "rad",
/* [GTK_CSS_DEG] = */ "deg",
/* [GTK_CSS_GRAD] = */ "grad",
/* [GTK_CSS_TURN] = */ "turn",
};
g_return_if_fail (number != NULL);
g_return_if_fail (string != NULL);
g_ascii_dtostr (buf, sizeof (buf), number->value);
g_string_append (string, buf);
if (number->value != 0.0)
g_string_append (string, names[number->unit]);
}