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/* 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 "gtkcssdimensionvalueprivate.h"
GtkCssValue *
gtk_css_dimension_value_parse (GtkCssParser *parser,
GtkCssNumberParseFlags flags)
{
static const struct {
const char *name;
GtkCssUnit unit;
GtkCssNumberParseFlags required_flags;
} units[] = {
{ "px", GTK_CSS_PX, GTK_CSS_PARSE_LENGTH },
{ "pt", GTK_CSS_PT, GTK_CSS_PARSE_LENGTH },
{ "em", GTK_CSS_EM, GTK_CSS_PARSE_LENGTH },
{ "ex", GTK_CSS_EX, GTK_CSS_PARSE_LENGTH },
{ "rem", GTK_CSS_REM, GTK_CSS_PARSE_LENGTH },
{ "pc", GTK_CSS_PC, GTK_CSS_PARSE_LENGTH },
{ "in", GTK_CSS_IN, GTK_CSS_PARSE_LENGTH },
{ "cm", GTK_CSS_CM, GTK_CSS_PARSE_LENGTH },
{ "mm", GTK_CSS_MM, GTK_CSS_PARSE_LENGTH },
{ "rad", GTK_CSS_RAD, GTK_CSS_PARSE_ANGLE },
{ "deg", GTK_CSS_DEG, GTK_CSS_PARSE_ANGLE },
{ "grad", GTK_CSS_GRAD, GTK_CSS_PARSE_ANGLE },
{ "turn", GTK_CSS_TURN, GTK_CSS_PARSE_ANGLE },
{ "s", GTK_CSS_S, GTK_CSS_PARSE_TIME },
{ "ms", GTK_CSS_MS, GTK_CSS_PARSE_TIME }
};
const GtkCssToken *token;
GtkCssValue *result;
GtkCssUnit unit;
double number;
token = gtk_css_parser_get_token (parser);
/* Handle percentages first */
if (gtk_css_token_is (token, GTK_CSS_TOKEN_PERCENTAGE))
{
if (!(flags & GTK_CSS_PARSE_PERCENT))
{
gtk_css_parser_error_value (parser, "Percentages are not allowed here");
return NULL;
}
number = token->number.number;
unit = GTK_CSS_PERCENT;
}
else if (gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_INTEGER) ||
gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_INTEGER) ||
gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_NUMBER) ||
gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_NUMBER))
{
number = token->number.number;
if (number == 0.0)
{
if (flags & GTK_CSS_PARSE_NUMBER)
unit = GTK_CSS_NUMBER;
else if (flags & GTK_CSS_PARSE_LENGTH)
unit = GTK_CSS_PX;
else if (flags & GTK_CSS_PARSE_ANGLE)
unit = GTK_CSS_DEG;
else if (flags & GTK_CSS_PARSE_TIME)
unit = GTK_CSS_S;
else
unit = GTK_CSS_PERCENT;
}
else if (flags & GTK_CSS_PARSE_NUMBER)
{
unit = GTK_CSS_NUMBER;
}
else
{
gtk_css_parser_error_syntax (parser, "Unit is missing.");
return NULL;
}
}
else if (gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_INTEGER_DIMENSION) ||
gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_INTEGER_DIMENSION) ||
gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_DIMENSION) ||
gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_DIMENSION))
{
guint i;
for (i = 0; i < G_N_ELEMENTS (units); i++)
{
if (flags & units[i].required_flags &&
g_ascii_strcasecmp (token->dimension.dimension, units[i].name) == 0)
break;
}
if (i >= G_N_ELEMENTS (units))
{
gtk_css_parser_error_syntax (parser, "'%s' is not a valid unit", token->dimension.dimension);
return NULL;
}
unit = units[i].unit;
number = token->dimension.value;
}
else
{
gtk_css_parser_error_syntax (parser, "Expected a number");
return NULL;
}
if (flags & GTK_CSS_POSITIVE_ONLY &&
number < 0)
{
gtk_css_parser_error_value (parser, "Negative values are not allowed");
return NULL;
}
result = gtk_css_dimension_value_new (number, unit);
gtk_css_parser_consume_token (parser);
return result;
}
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