gboolean
_gtk_css_parser_try_int (GtkCssParser *parser,
int *value)
{
gint64 result;
char *end;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
g_return_val_if_fail (value != NULL, FALSE);
/* strtoll parses a plus, but we are not allowed to */
if (*parser->data == '+')
return FALSE;
errno = 0;
result = g_ascii_strtoll (parser->data, &end, 10);
if (errno)
return FALSE;
if (result > G_MAXINT || result < G_MININT)
return FALSE;
if (parser->data == end)
return FALSE;
parser->data = end;
*value = result;
_gtk_css_parser_skip_whitespace (parser);
return TRUE;
}
gboolean
_gtk_css_parser_is_string (GtkCssParser *parser)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
return *parser->data == '"' || *parser->data == '\'';
}
char *
_gtk_css_parser_read_string (GtkCssParser *parser)
{
GString *str;
char quote;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
quote = *parser->data;
if (quote != '"' && quote != '\'')
{
_gtk_css_parser_error (parser, "Expected a string.");
return NULL;
}
parser->data++;
str = g_string_new (NULL);
while (TRUE)
{
gsize len = strcspn (parser->data, "\\'\"\n\r\f");
g_string_append_len (str, parser->data, len);
parser->data += len;
switch (*parser->data)
{
case '\\':
_gtk_css_parser_unescape (parser, str);
break;
case '"':
case '\'':
if (*parser->data == quote)
{
parser->data++;
_gtk_css_parser_skip_whitespace (parser);
return g_string_free (str, FALSE);
}
g_string_append_c (str, *parser->data);
parser->data++;
break;
case '\0':
/* FIXME: position */
_gtk_css_parser_error (parser, "Missing end quote in string.");
g_string_free (str, TRUE);
return NULL;
default:
_gtk_css_parser_error (parser,
"Invalid character in string. Must be escaped.");
g_string_free (str, TRUE);
return NULL;
}
}
g_assert_not_reached ();
return NULL;
}
guint
_gtk_css_parser_get_position (GtkCssParser *parser)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), 1);
return parser->data - parser->line_start;
}
char *
_gtk_css_parser_try_ident (GtkCssParser *parser,
gboolean skip_whitespace)
{
const char *start;
GString *ident;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
start = parser->data;
ident = g_string_new (NULL);
if (*parser->data == '-')
{
g_string_append_c (ident, '-');
parser->data++;
}
if (!_gtk_css_parser_read_char (parser, ident, NMSTART))
{
parser->data = start;
g_string_free (ident, TRUE);
return NULL;
}
while (_gtk_css_parser_read_char (parser, ident, NMCHAR))
;
if (skip_whitespace)
_gtk_css_parser_skip_whitespace (parser);
return g_string_free (ident, FALSE);
}
guint
_gtk_css_parser_get_line (GtkCssParser *parser)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), 1);
return parser->line;
}
char *
_gtk_css_parser_read_value (GtkCssParser *parser)
{
const char *start;
char *result;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
start = parser->data;
/* This needs to be done better */
_gtk_css_parser_resync_internal (parser, TRUE, FALSE, '}');
result = g_strndup (start, parser->data - start);
if (result)
{
g_strchomp (result);
if (result[0] == 0)
{
g_free (result);
result = NULL;
}
}
if (result == NULL)
_gtk_css_parser_error (parser, "Expected a property value");
return result;
}
void
_gtk_css_parser_free (GtkCssParser *parser)
{
g_return_if_fail (GTK_IS_CSS_PARSER (parser));
g_slice_free (GtkCssParser, parser);
}
gboolean
_gtk_css_parser_is_eof (GtkCssParser *parser)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), TRUE);
return *parser->data == 0;
}
gboolean
_gtk_css_parser_try_uint (GtkCssParser *parser,
guint *value)
{
guint64 result;
char *end;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
g_return_val_if_fail (value != NULL, FALSE);
errno = 0;
result = g_ascii_strtoull (parser->data, &end, 10);
if (errno)
return FALSE;
if (result > G_MAXUINT)
return FALSE;
if (parser->data == end)
return FALSE;
parser->data = end;
*value = result;
_gtk_css_parser_skip_whitespace (parser);
return TRUE;
}
gboolean
_gtk_css_parser_begins_with (GtkCssParser *parser,
char c)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), TRUE);
return *parser->data == c;
}
gboolean
_gtk_css_parser_has_prefix (GtkCssParser *parser,
const char *prefix)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
return g_ascii_strncasecmp (parser->data, prefix, strlen (prefix)) == 0;
}
void
_gtk_css_parser_resync (GtkCssParser *parser,
gboolean sync_at_semicolon,
char terminator)
{
g_return_if_fail (GTK_IS_CSS_PARSER (parser));
gtk_css_parser_resync_internal (parser, sync_at_semicolon, TRUE, terminator);
}
void
_gtk_css_parser_free (GtkCssParser *parser)
{
g_return_if_fail (GTK_IS_CSS_PARSER (parser));
if (parser->file)
g_object_unref (parser->file);
g_slice_free (GtkCssParser, parser);
}
char *
_gtk_css_parser_read_uri (GtkCssParser *parser)
{
char *result;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
if (!_gtk_css_parser_try (parser, "url(", TRUE))
{
_gtk_css_parser_error (parser, "expected 'url('");
return NULL;
}
_gtk_css_parser_skip_whitespace (parser);
if (_gtk_css_parser_is_string (parser))
{
result = _gtk_css_parser_read_string (parser);
}
else
{
GString *str = g_string_new (NULL);
while (_gtk_css_parser_read_char (parser, str, URLCHAR))
;
result = g_string_free (str, FALSE);
if (result == NULL)
_gtk_css_parser_error (parser, "not a url");
}
if (result == NULL)
return NULL;
_gtk_css_parser_skip_whitespace (parser);
if (*parser->data != ')')
{
_gtk_css_parser_error (parser, "missing ')' for url");
g_free (result);
return NULL;
}
parser->data++;
_gtk_css_parser_skip_whitespace (parser);
return result;
}
gboolean
_gtk_css_parser_try_enum (GtkCssParser *parser,
GType enum_type,
int *value)
{
GEnumClass *enum_class;
gboolean result;
const char *start;
char *str;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
g_return_val_if_fail (value != NULL, FALSE);
result = FALSE;
enum_class = g_type_class_ref (enum_type);
start = parser->data;
str = _gtk_css_parser_try_ident (parser, TRUE);
if (str == NULL)
return FALSE;
if (enum_class->n_values)
{
GEnumValue *enum_value;
for (enum_value = enum_class->values; enum_value->value_name; enum_value++)
{
if (enum_value->value_nick &&
g_ascii_strcasecmp (str, enum_value->value_nick) == 0)
{
*value = enum_value->value;
result = TRUE;
break;
}
}
}
g_free (str);
g_type_class_unref (enum_class);
if (!result)
parser->data = start;
return result;
}
gboolean
_gtk_css_parser_try (GtkCssParser *parser,
const char *string,
gboolean skip_whitespace)
{
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
g_return_val_if_fail (string != NULL, FALSE);
if (g_ascii_strncasecmp (parser->data, string, strlen (string)) != 0)
return FALSE;
parser->data += strlen (string);
if (skip_whitespace)
_gtk_css_parser_skip_whitespace (parser);
return TRUE;
}
char *
_gtk_css_parser_try_name (GtkCssParser *parser,
gboolean skip_whitespace)
{
GString *name;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
name = g_string_new (NULL);
while (_gtk_css_parser_read_char (parser, name, NMCHAR))
;
if (skip_whitespace)
_gtk_css_parser_skip_whitespace (parser);
return g_string_free (name, FALSE);
}
gboolean
_gtk_css_parser_try_double (GtkCssParser *parser,
gdouble *value)
{
gdouble result;
char *end;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
g_return_val_if_fail (value != NULL, FALSE);
errno = 0;
result = g_ascii_strtod (parser->data, &end);
if (errno)
return FALSE;
if (parser->data == end)
return FALSE;
parser->data = end;
*value = result;
_gtk_css_parser_skip_whitespace (parser);
return TRUE;
}
GtkCssValue *
_gtk_css_number_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 },
{ "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 }
};
char *end, *unit_name;
double value;
GtkCssUnit unit;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
errno = 0;
value = g_ascii_strtod (parser->data, &end);
if (errno)
{
_gtk_css_parser_error (parser, "not a number: %s", g_strerror (errno));
return NULL;
}
if (parser->data == end)
{
_gtk_css_parser_error (parser, "not a number");
return NULL;
}
parser->data = end;
if (flags & GTK_CSS_POSITIVE_ONLY &&
value < 0)
{
_gtk_css_parser_error (parser, "negative values are not allowed.");
return NULL;
}
unit_name = _gtk_css_parser_try_ident (parser, FALSE);
if (unit_name)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (units); i++)
{
if (flags & units[i].required_flags &&
g_ascii_strcasecmp (unit_name, units[i].name) == 0)
break;
}
if (i >= G_N_ELEMENTS (units))
{
_gtk_css_parser_error (parser, "`%s' is not a valid unit.", unit_name);
g_free (unit_name);
return NULL;
}
unit = units[i].unit;
g_free (unit_name);
}
else
{
if ((flags & GTK_CSS_PARSE_PERCENT) &&
_gtk_css_parser_try (parser, "%", FALSE))
{
unit = GTK_CSS_PERCENT;
}
else if (value == 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_NUMBER_AS_PIXELS)
{
_gtk_css_parser_error_full (parser,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"Not using units is deprecated. Assuming 'px'.");
unit = GTK_CSS_PX;
}
else if (flags & GTK_CSS_PARSE_NUMBER)
{
unit = GTK_CSS_NUMBER;
}
else
{
_gtk_css_parser_error (parser, "Unit is missing.");
return NULL;
}
}
_gtk_css_parser_skip_whitespace (parser);
return _gtk_css_number_value_new (value, unit);
}
GtkSymbolicColor *
_gtk_css_parser_read_symbolic_color (GtkCssParser *parser)
{
GtkSymbolicColor *symbolic;
guint color;
const char *names[] = {"rgba", "rgb", "lighter", "darker", "shade", "alpha", "mix",
GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME};
char *name;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), NULL);
if (_gtk_css_parser_try (parser, "@", FALSE))
{
name = _gtk_css_parser_try_name (parser, TRUE);
if (name)
{
symbolic = gtk_symbolic_color_new_name (name);
}
else
{
_gtk_css_parser_error (parser, "'%s' is not a valid symbolic color name", name);
symbolic = NULL;
}
g_free (name);
return symbolic;
}
for (color = 0; color < G_N_ELEMENTS (names); color++)
{
if (_gtk_css_parser_try (parser, names[color], TRUE))
break;
}
if (color < G_N_ELEMENTS (names))
return gtk_css_parser_read_symbolic_color_function (parser, color);
symbolic = gtk_css_parser_try_hash_color (parser);
if (symbolic)
return symbolic;
name = _gtk_css_parser_try_name (parser, TRUE);
if (name)
{
GdkRGBA rgba;
if (gdk_rgba_parse (&rgba, name))
{
symbolic = gtk_symbolic_color_new_literal (&rgba);
}
else
{
_gtk_css_parser_error (parser, "'%s' is not a valid color name", name);
symbolic = NULL;
}
g_free (name);
return symbolic;
}
_gtk_css_parser_error (parser, "Not a color definition");
return NULL;
}
