forked from AuroraMiddleware/gtk
135 lines
4.4 KiB
C
135 lines
4.4 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcssdimensionvalueprivate.h"
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GtkCssValue *
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gtk_css_dimension_value_parse (GtkCssParser *parser,
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GtkCssNumberParseFlags flags)
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{
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static const struct {
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const char *name;
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GtkCssUnit unit;
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GtkCssNumberParseFlags required_flags;
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} units[] = {
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{ "px", GTK_CSS_PX, GTK_CSS_PARSE_LENGTH },
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{ "pt", GTK_CSS_PT, GTK_CSS_PARSE_LENGTH },
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{ "em", GTK_CSS_EM, GTK_CSS_PARSE_LENGTH },
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{ "ex", GTK_CSS_EX, GTK_CSS_PARSE_LENGTH },
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{ "rem", GTK_CSS_REM, GTK_CSS_PARSE_LENGTH },
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{ "pc", GTK_CSS_PC, GTK_CSS_PARSE_LENGTH },
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{ "in", GTK_CSS_IN, GTK_CSS_PARSE_LENGTH },
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{ "cm", GTK_CSS_CM, GTK_CSS_PARSE_LENGTH },
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{ "mm", GTK_CSS_MM, GTK_CSS_PARSE_LENGTH },
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{ "rad", GTK_CSS_RAD, GTK_CSS_PARSE_ANGLE },
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{ "deg", GTK_CSS_DEG, GTK_CSS_PARSE_ANGLE },
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{ "grad", GTK_CSS_GRAD, GTK_CSS_PARSE_ANGLE },
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{ "turn", GTK_CSS_TURN, GTK_CSS_PARSE_ANGLE },
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{ "s", GTK_CSS_S, GTK_CSS_PARSE_TIME },
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{ "ms", GTK_CSS_MS, GTK_CSS_PARSE_TIME }
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};
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const GtkCssToken *token;
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GtkCssValue *result;
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GtkCssUnit unit;
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double number;
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token = gtk_css_parser_get_token (parser);
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/* Handle percentages first */
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if (gtk_css_token_is (token, GTK_CSS_TOKEN_PERCENTAGE))
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{
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if (!(flags & GTK_CSS_PARSE_PERCENT))
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{
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gtk_css_parser_error_value (parser, "Percentages are not allowed here");
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return NULL;
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}
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number = token->number.number;
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unit = GTK_CSS_PERCENT;
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}
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else if (gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_INTEGER) ||
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gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_INTEGER) ||
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gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_NUMBER) ||
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gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_NUMBER))
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{
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number = token->number.number;
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if (number == 0.0)
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{
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if (flags & GTK_CSS_PARSE_NUMBER)
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unit = GTK_CSS_NUMBER;
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else if (flags & GTK_CSS_PARSE_LENGTH)
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unit = GTK_CSS_PX;
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else if (flags & GTK_CSS_PARSE_ANGLE)
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unit = GTK_CSS_DEG;
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else if (flags & GTK_CSS_PARSE_TIME)
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unit = GTK_CSS_S;
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else
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unit = GTK_CSS_PERCENT;
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}
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else if (flags & GTK_CSS_PARSE_NUMBER)
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{
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unit = GTK_CSS_NUMBER;
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}
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else
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{
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gtk_css_parser_error_syntax (parser, "Unit is missing.");
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return NULL;
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}
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}
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else if (gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_INTEGER_DIMENSION) ||
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gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_INTEGER_DIMENSION) ||
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gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNED_DIMENSION) ||
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gtk_css_token_is (token, GTK_CSS_TOKEN_SIGNLESS_DIMENSION))
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{
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guint i;
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for (i = 0; i < G_N_ELEMENTS (units); i++)
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{
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if (flags & units[i].required_flags &&
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g_ascii_strcasecmp (token->dimension.dimension, units[i].name) == 0)
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break;
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}
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if (i >= G_N_ELEMENTS (units))
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{
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gtk_css_parser_error_syntax (parser, "'%s' is not a valid unit", token->dimension.dimension);
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return NULL;
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}
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unit = units[i].unit;
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number = token->dimension.value;
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}
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else
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{
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gtk_css_parser_error_syntax (parser, "Expected a number");
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return NULL;
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}
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if (flags & GTK_CSS_POSITIVE_ONLY &&
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number < 0)
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{
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gtk_css_parser_error_value (parser, "Negative values are not allowed");
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return NULL;
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}
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result = gtk_css_dimension_value_new (number, unit);
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gtk_css_parser_consume_token (parser);
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return result;
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}
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