static GtkCssValue *
gtk_css_value_initial_compute (GtkCssValue *value,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkSettings *settings;
switch (property_id)
{
case GTK_CSS_PROPERTY_DPI:
settings = _gtk_style_provider_private_get_settings (provider);
if (settings)
{
GdkScreen *screen = _gtk_settings_get_screen (settings);
double resolution = gdk_screen_get_resolution (screen);
if (resolution > 0.0)
return _gtk_css_number_value_new (resolution, GTK_CSS_NUMBER);
}
break;
case GTK_CSS_PROPERTY_FONT_FAMILY:
settings = _gtk_style_provider_private_get_settings (provider);
if (settings)
{
PangoFontDescription *description;
char *font_name;
GtkCssValue *value;
g_object_get (settings, "gtk-font-name", &font_name, NULL);
description = pango_font_description_from_string (font_name);
g_free (font_name);
if (description == NULL)
break;
if (pango_font_description_get_set_fields (description) & PANGO_FONT_MASK_FAMILY)
{
value = _gtk_css_array_value_new (_gtk_css_string_value_new (pango_font_description_get_family (description)));
pango_font_description_free (description);
return value;
}
pango_font_description_free (description);
}
break;
default:
break;
}
return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
property_id,
provider,
style,
parent_style);
}
static GtkCssValue *
gtk_css_value_win32_size_compute (GtkCssValue *value,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
return _gtk_css_number_value_new (value->scale * gtk_css_value_win32_compute_size (value), GTK_CSS_PX);
}
static GtkCssValue *
gtk_css_value_number_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
/* FIXME: This needs to be supported at least for percentages,
* but for that we kinda need to support calc(5px + 50%) */
if (start->unit != end->unit)
return NULL;
return _gtk_css_number_value_new (start->value + (end->value - start->value) * progress,
start->unit);
}
static GtkCssValue *
gtk_css_value_number_compute (GtkCssValue *number,
guint property_id,
GtkStyleProviderPrivate *provider,
int scale,
GtkCssComputedValues *values,
GtkCssComputedValues *parent_values,
GtkCssDependencies *dependencies)
{
switch (number->unit)
{
default:
g_assert_not_reached();
/* fall through */
case GTK_CSS_PERCENT:
/* percentages for font sizes are computed, other percentages aren't */
if (property_id == GTK_CSS_PROPERTY_FONT_SIZE)
return _gtk_css_number_value_new (number->value / 100.0 *
get_base_font_size (property_id, provider, values, parent_values, dependencies),
GTK_CSS_PX);
case GTK_CSS_NUMBER:
case GTK_CSS_PX:
case GTK_CSS_DEG:
case GTK_CSS_S:
return _gtk_css_value_ref (number);
case GTK_CSS_PT:
return _gtk_css_number_value_new (number->value * 96.0 / 72.0,
GTK_CSS_PX);
case GTK_CSS_PC:
return _gtk_css_number_value_new (number->value * 96.0 / 72.0 * 12.0,
GTK_CSS_PX);
break;
case GTK_CSS_IN:
return _gtk_css_number_value_new (number->value * 96.0,
GTK_CSS_PX);
break;
case GTK_CSS_CM:
return _gtk_css_number_value_new (number->value * 96.0 * 0.39370078740157477,
GTK_CSS_PX);
break;
case GTK_CSS_MM:
return _gtk_css_number_value_new (number->value * 96.0 * 0.039370078740157477,
GTK_CSS_PX);
break;
case GTK_CSS_EM:
return _gtk_css_number_value_new (number->value *
get_base_font_size (property_id, provider, values, parent_values, dependencies),
GTK_CSS_PX);
break;
case GTK_CSS_EX:
/* for now we pretend ex is half of em */
return _gtk_css_number_value_new (number->value * 0.5 *
get_base_font_size (property_id, provider, values, parent_values, dependencies),
GTK_CSS_PX);
case GTK_CSS_RAD:
return _gtk_css_number_value_new (number->value * 360.0 / (2 * G_PI),
GTK_CSS_DEG);
case GTK_CSS_GRAD:
return _gtk_css_number_value_new (number->value * 360.0 / 400.0,
GTK_CSS_DEG);
case GTK_CSS_TURN:
return _gtk_css_number_value_new (number->value * 360.0,
GTK_CSS_DEG);
case GTK_CSS_MS:
return _gtk_css_number_value_new (number->value / 1000.0,
GTK_CSS_S);
}
}
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);
}
static gboolean
gtk_css_image_radial_parse (GtkCssImage *image,
GtkCssParser *parser)
{
GtkCssImageRadial *radial = GTK_CSS_IMAGE_RADIAL (image);
gboolean has_shape = FALSE;
gboolean has_size = FALSE;
gboolean found_one = FALSE;
guint i;
static struct {
const char *name;
guint value;
} names[] = {
{ "closest-side", GTK_CSS_CLOSEST_SIDE },
{ "farthest-side", GTK_CSS_FARTHEST_SIDE },
{ "closest-corner", GTK_CSS_CLOSEST_CORNER },
{ "farthest-corner", GTK_CSS_FARTHEST_CORNER }
};
if (_gtk_css_parser_try (parser, "repeating-radial-gradient(", TRUE))
radial->repeating = TRUE;
else if (_gtk_css_parser_try (parser, "radial-gradient(", TRUE))
radial->repeating = FALSE;
else
{
_gtk_css_parser_error (parser, "Not a radial gradient");
return FALSE;
}
do {
found_one = FALSE;
if (!has_shape && _gtk_css_parser_try (parser, "circle", TRUE))
{
radial->circle = TRUE;
found_one = has_shape = TRUE;
}
else if (!has_shape && _gtk_css_parser_try (parser, "ellipse", TRUE))
{
radial->circle = FALSE;
found_one = has_shape = TRUE;
}
else if (!has_size)
{
for (i = 0; i < G_N_ELEMENTS (names); i++)
{
if (_gtk_css_parser_try (parser, names[i].name, TRUE))
{
found_one = has_size = TRUE;
radial->size = names[i].value;
break;
}
}
if (!has_size)
{
if (_gtk_css_parser_has_number (parser))
radial->sizes[0] = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH | GTK_CSS_PARSE_PERCENT);
if (_gtk_css_parser_has_number (parser))
radial->sizes[1] = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_LENGTH | GTK_CSS_PARSE_PERCENT);
found_one = has_size = radial->sizes[0] != NULL;
}
}
} while (found_one && !(has_shape && has_size));
if (_gtk_css_parser_try (parser, "at", TRUE))
{
radial->position = _gtk_css_position_value_parse (parser);
if (!radial->position)
return FALSE;
if (!_gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_parser_error (parser, "Expected a comma here");
return FALSE;
}
}
else
{
radial->position = _gtk_css_position_value_new (_gtk_css_number_value_new (50, GTK_CSS_PERCENT),
_gtk_css_number_value_new (50, GTK_CSS_PERCENT));
if ((has_shape || has_size) &&
!_gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_parser_error (parser, "Expected a comma here");
return FALSE;
}
}
if (!has_size)
{
radial->size = GTK_CSS_FARTHEST_CORNER;
}
if (!has_shape)
{
if (radial->sizes[0] && radial->sizes[1])
radial->circle = FALSE;
else
radial->circle = TRUE;
}
if (has_shape && radial->circle)
{
if (radial->sizes[0] && radial->sizes[1])
{
_gtk_css_parser_error (parser, "Circular gradient can only have one size");
return FALSE;
}
if (radial->sizes[0] && _gtk_css_number_value_get_unit (radial->sizes[0]) == GTK_CSS_PERCENT)
{
_gtk_css_parser_error (parser, "Circular gradient cannot have percentage as size");
return FALSE;
}
}
if (has_size && !radial->circle)
{
if (!radial->sizes[1])
radial->sizes[1] = _gtk_css_value_ref (radial->sizes[0]);
}
do {
GtkCssImageRadialColorStop stop;
stop.color = _gtk_css_color_value_parse (parser);
if (stop.color == NULL)
return FALSE;
if (_gtk_css_parser_has_number (parser))
{
stop.offset = _gtk_css_number_value_parse (parser,
GTK_CSS_PARSE_PERCENT
| GTK_CSS_PARSE_LENGTH);
if (stop.offset == NULL)
{
_gtk_css_value_unref (stop.color);
return FALSE;
}
}
else
{
stop.offset = NULL;
}
g_array_append_val (radial->stops, stop);
} while (_gtk_css_parser_try (parser, ",", TRUE));
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
_gtk_css_parser_error (parser, "Missing closing bracket at end of radial gradient");
return FALSE;
}
return TRUE;
}
static gboolean
gtk_css_image_linear_parse (GtkCssImage *image,
GtkCssParser *parser)
{
GtkCssImageLinear *linear = GTK_CSS_IMAGE_LINEAR (image);
guint i;
if (_gtk_css_parser_try (parser, "repeating-linear-gradient(", TRUE))
linear->repeating = TRUE;
else if (_gtk_css_parser_try (parser, "linear-gradient(", TRUE))
linear->repeating = FALSE;
else
{
_gtk_css_parser_error (parser, "Not a linear gradient");
return FALSE;
}
if (_gtk_css_parser_try (parser, "to", TRUE))
{
guint side = 0;
for (i = 0; i < 2; i++)
{
if (_gtk_css_parser_try (parser, "left", TRUE))
{
if (side & ((1 << GTK_CSS_LEFT) | (1 << GTK_CSS_RIGHT)))
{
_gtk_css_parser_error (parser, "Expected 'top', 'bottom' or comma");
return FALSE;
}
side |= (1 << GTK_CSS_LEFT);
}
else if (_gtk_css_parser_try (parser, "right", TRUE))
{
if (side & ((1 << GTK_CSS_LEFT) | (1 << GTK_CSS_RIGHT)))
{
_gtk_css_parser_error (parser, "Expected 'top', 'bottom' or comma");
return FALSE;
}
side |= (1 << GTK_CSS_RIGHT);
}
else if (_gtk_css_parser_try (parser, "top", TRUE))
{
if (side & ((1 << GTK_CSS_TOP) | (1 << GTK_CSS_BOTTOM)))
{
_gtk_css_parser_error (parser, "Expected 'left', 'right' or comma");
return FALSE;
}
side |= (1 << GTK_CSS_TOP);
}
else if (_gtk_css_parser_try (parser, "bottom", TRUE))
{
if (side & ((1 << GTK_CSS_TOP) | (1 << GTK_CSS_BOTTOM)))
{
_gtk_css_parser_error (parser, "Expected 'left', 'right' or comma");
return FALSE;
}
side |= (1 << GTK_CSS_BOTTOM);
}
else
break;
}
if (side == 0)
{
_gtk_css_parser_error (parser, "Expected side that gradient should go to");
return FALSE;
}
linear->angle = _gtk_css_number_value_new (side, GTK_CSS_NUMBER);
if (!_gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_parser_error (parser, "Expected a comma");
return FALSE;
}
}
else if (_gtk_css_parser_has_number (parser))
{
linear->angle = _gtk_css_number_value_parse (parser, GTK_CSS_PARSE_ANGLE);
if (linear->angle == NULL)
return FALSE;
if (!_gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_parser_error (parser, "Expected a comma");
return FALSE;
}
}
else
linear->angle = _gtk_css_number_value_new (1 << GTK_CSS_BOTTOM, GTK_CSS_NUMBER);
do {
GtkCssImageLinearColorStop stop;
stop.color = _gtk_css_color_value_parse (parser);
if (stop.color == NULL)
return FALSE;
if (_gtk_css_parser_has_number (parser))
{
stop.offset = _gtk_css_number_value_parse (parser,
GTK_CSS_PARSE_PERCENT
| GTK_CSS_PARSE_LENGTH);
if (stop.offset == NULL)
{
_gtk_css_value_unref (stop.color);
return FALSE;
}
}
else
{
stop.offset = NULL;
}
g_array_append_val (linear->stops, stop);
} while (_gtk_css_parser_try (parser, ",", TRUE));
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
_gtk_css_parser_error (parser, "Missing closing bracket at end of linear gradient");
return FALSE;
}
return TRUE;
}
