/* GTK - The GIMP Toolkit
* Copyright (C) 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 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 "gtkcsspositionvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
GtkCssValue *x;
GtkCssValue *y;
};
static void
gtk_css_value_position_free (GtkCssValue *value)
{
_gtk_css_value_unref (value->x);
_gtk_css_value_unref (value->y);
g_slice_free (GtkCssValue, value);
}
static GtkCssValue *
gtk_css_value_position_compute (GtkCssValue *position,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssComputedValues *values,
GtkCssComputedValues *parent_values,
GtkCssDependencies *dependencies)
{
GtkCssValue *x, *y;
GtkCssDependencies x_deps, y_deps;
x = _gtk_css_value_compute (position->x, property_id, provider, values, parent_values, &x_deps);
y = _gtk_css_value_compute (position->y, property_id, provider, values, parent_values, &y_deps);
*dependencies = _gtk_css_dependencies_union (x_deps, y_deps);
if (x == position->x && y == position->y)
{
_gtk_css_value_unref (x);
_gtk_css_value_unref (y);
return _gtk_css_value_ref (position);
}
return _gtk_css_position_value_new (x, y);
}
static gboolean
gtk_css_value_position_equal (const GtkCssValue *position1,
const GtkCssValue *position2)
{
return _gtk_css_value_equal (position1->x, position2->x)
&& _gtk_css_value_equal (position1->y, position2->y);
}
static GtkCssValue *
gtk_css_value_position_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
GtkCssValue *x, *y;
x = _gtk_css_value_transition (start->x, end->x, property_id, progress);
if (x == NULL)
return NULL;
y = _gtk_css_value_transition (start->y, end->y, property_id, progress);
if (y == NULL)
{
_gtk_css_value_unref (x);
return NULL;
}
return _gtk_css_position_value_new (x, y);
}
static void
gtk_css_value_position_print (const GtkCssValue *position,
GString *string)
{
struct {
const char *x_name;
const char *y_name;
GtkCssValue *number;
} values[] = {
{ "left", "top", _gtk_css_number_value_new (0, GTK_CSS_PERCENT) },
{ "right", "bottom", _gtk_css_number_value_new (100, GTK_CSS_PERCENT) }
};
GtkCssValue *center = _gtk_css_number_value_new (50, GTK_CSS_PERCENT);
guint i;
if (_gtk_css_value_equal (position->x, center))
{
if (_gtk_css_value_equal (position->y, center))
{
g_string_append (string, "center");
goto done;
}
}
else
{
for (i = 0; i < G_N_ELEMENTS (values); i++)
{
if (_gtk_css_value_equal (position->x, values[i].number))
{
g_string_append (string, values[i].x_name);
break;
}
}
if (i == G_N_ELEMENTS (values))
_gtk_css_value_print (position->x, string);
if (_gtk_css_value_equal (position->y, center))
goto done;
g_string_append_c (string, ' ');
}
for (i = 0; i < G_N_ELEMENTS (values); i++)
{
if (_gtk_css_value_equal (position->y, values[i].number))
{
g_string_append (string, values[i].y_name);
goto done;
}
}
if (i == G_N_ELEMENTS (values))
{
if (_gtk_css_value_equal (position->x, center))
g_string_append (string, "center ");
_gtk_css_value_print (position->y, string);
}
done:
for (i = 0; i < G_N_ELEMENTS (values); i++)
_gtk_css_value_unref (values[i].number);
_gtk_css_value_unref (center);
}
static const GtkCssValueClass GTK_CSS_VALUE_POSITION = {
gtk_css_value_position_free,
gtk_css_value_position_compute,
gtk_css_value_position_equal,
gtk_css_value_position_transition,
gtk_css_value_position_print
};
GtkCssValue *
_gtk_css_position_value_new (GtkCssValue *x,
GtkCssValue *y)
{
GtkCssValue *result;
result = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_POSITION);
result->x = x;
result->y = y;
return result;
}
GtkCssValue *
_gtk_css_position_value_parse (GtkCssParser *parser)
{
static const struct {
const char *name;
guint percentage;
gboolean horizontal;
gboolean vertical;
} names[] = {
{ "left", 0, TRUE, FALSE },
{ "right", 100, TRUE, FALSE },
{ "center", 50, TRUE, TRUE },
{ "top", 0, FALSE, TRUE },
{ "bottom", 100, FALSE, TRUE },
{ NULL , 0, TRUE, FALSE }, /* used for numbers */
{ NULL , 50, TRUE, TRUE } /* used for no value */
};
GtkCssValue *x, *y;
GtkCssValue **missing;
guint first, second;
for (first = 0; names[first].name != NULL; first++)
{
if (_gtk_css_parser_try (parser, names[first].name, TRUE))
{
if (names[first].horizontal)
{
x = _gtk_css_number_value_new (names[first].percentage, GTK_CSS_PERCENT);
missing = &y;
}
else
{
y = _gtk_css_number_value_new (names[first].percentage, GTK_CSS_PERCENT);
missing = &x;
}
break;
}
}
if (names[first].name == NULL)
{
if (_gtk_css_parser_has_number (parser))
{
missing = &y;
x = _gtk_css_number_value_parse (parser,
GTK_CSS_PARSE_PERCENT
| GTK_CSS_PARSE_LENGTH);
if (x == NULL)
return NULL;
}
else
return NULL;
}
for (second = 0; names[second].name != NULL; second++)
{
if (_gtk_css_parser_try (parser, names[second].name, TRUE))
{
*missing = _gtk_css_number_value_new (names[second].percentage, GTK_CSS_PERCENT);
break;
}
}
if (names[second].name == NULL)
{
if (_gtk_css_parser_has_number (parser))
{
if (missing != &y)
{
_gtk_css_parser_error (parser, "Invalid combination of values");
_gtk_css_value_unref (y);
return NULL;
}
y = _gtk_css_number_value_parse (parser,
GTK_CSS_PARSE_PERCENT
| GTK_CSS_PARSE_LENGTH);
if (y == NULL)
{
_gtk_css_value_unref (x);
return NULL;
}
}
else
{
second++;
*missing = _gtk_css_number_value_new (50, GTK_CSS_PERCENT);
}
}
else
{
if ((names[first].horizontal && !names[second].vertical) ||
(!names[first].horizontal && !names[second].horizontal))
{
_gtk_css_parser_error (parser, "Invalid combination of values");
_gtk_css_value_unref (x);
_gtk_css_value_unref (y);
return NULL;
}
}
return _gtk_css_position_value_new (x, y);
}
double
_gtk_css_position_value_get_x (const GtkCssValue *position,
double one_hundred_percent)
{
g_return_val_if_fail (position != NULL, 0.0);
g_return_val_if_fail (position->class == >K_CSS_VALUE_POSITION, 0.0);
return _gtk_css_number_value_get (position->x, one_hundred_percent);
}
double
_gtk_css_position_value_get_y (const GtkCssValue *position,
double one_hundred_percent)
{
g_return_val_if_fail (position != NULL, 0.0);
g_return_val_if_fail (position->class == >K_CSS_VALUE_POSITION, 0.0);
return _gtk_css_number_value_get (position->y, one_hundred_percent);
}