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gtk2/gtk/gtkcssnumbervalue.c
Benjamin Otte d7266b25ba Replace "gint" with "int"
2020-07-25 00:47:36 +02:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2016 Benjamin Otte <otte@gnome.org>
*
* 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 "gtkcssnumbervalueprivate.h"
#include "gtkcsscalcvalueprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssdimensionvalueprivate.h"
#include "gtkcssstyleprivate.h"
#include "gtkprivate.h"
static GtkCssValue * gtk_css_calc_value_new (guint n_terms);
static GtkCssValue * gtk_css_calc_value_new_sum (GtkCssValue *a,
GtkCssValue *b);
enum {
TYPE_CALC = 0,
TYPE_DIMENSION = 1,
};
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
guint type : 1; /* Calc or dimension */
union {
struct {
GtkCssUnit unit;
double value;
} dimension;
struct {
guint n_terms;
GtkCssValue *terms[1];
} calc;
};
};
static GtkCssValue *
gtk_css_calc_value_new_from_array (GtkCssValue **values,
guint n_values)
{
GtkCssValue *result;
if (n_values > 1)
{
result = gtk_css_calc_value_new (n_values);
memcpy (result->calc.terms, values, n_values * sizeof (GtkCssValue *));
}
else
{
result = values[0];
}
return result;
}
static void
gtk_css_value_number_free (GtkCssValue *value)
{
g_slice_free (GtkCssValue, value);
}
static double
get_dpi (GtkCssStyle *style)
{
return _gtk_css_number_value_get (style->core->dpi, 96);
}
static double
get_base_font_size_px (guint property_id,
GtkStyleProvider *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
if (property_id == GTK_CSS_PROPERTY_FONT_SIZE)
{
if (parent_style)
return _gtk_css_number_value_get (parent_style->core->font_size, 100);
else
return gtk_css_font_size_get_default_px (provider, style);
}
return _gtk_css_number_value_get (style->core->font_size, 100);
}
static GtkCssValue *
gtk_css_value_number_compute (GtkCssValue *number,
guint property_id,
GtkStyleProvider *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
double value;
if (G_UNLIKELY (number->type == TYPE_CALC))
{
const guint n_terms = number->calc.n_terms;
GtkCssValue *result;
gboolean changed = FALSE;
gsize i;
GtkCssValue **new_values;
new_values = g_alloca (sizeof (GtkCssValue *) * n_terms);
for (i = 0; i < n_terms; i++)
{
GtkCssValue *computed = _gtk_css_value_compute (number->calc.terms[i],
property_id, provider, style,
parent_style);
changed |= computed != number->calc.terms[i];
new_values[i] = computed;
}
if (changed)
{
result = gtk_css_calc_value_new_from_array (new_values, n_terms);
}
else
{
for (i = 0; i < n_terms; i++)
gtk_css_value_unref (new_values[i]);
result = _gtk_css_value_ref (number);
}
return result;
}
g_assert (number->type == TYPE_DIMENSION);
value = number->dimension.value;
switch (number->dimension.unit)
{
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_dimension_value_new (value / 100.0 *
get_base_font_size_px (property_id, provider, style, parent_style),
GTK_CSS_PX);
G_GNUC_FALLTHROUGH;
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_dimension_value_new (value * get_dpi (style) / 72.0,
GTK_CSS_PX);
case GTK_CSS_PC:
return gtk_css_dimension_value_new (value * get_dpi (style) / 72.0 * 12.0,
GTK_CSS_PX);
case GTK_CSS_IN:
return gtk_css_dimension_value_new (value * get_dpi (style),
GTK_CSS_PX);
case GTK_CSS_CM:
return gtk_css_dimension_value_new (value * get_dpi (style) * 0.39370078740157477,
GTK_CSS_PX);
case GTK_CSS_MM:
return gtk_css_dimension_value_new (value * get_dpi (style) * 0.039370078740157477,
GTK_CSS_PX);
case GTK_CSS_EM:
return gtk_css_dimension_value_new (value *
get_base_font_size_px (property_id, provider, style, parent_style),
GTK_CSS_PX);
case GTK_CSS_EX:
/* for now we pretend ex is half of em */
return gtk_css_dimension_value_new (value * 0.5 *
get_base_font_size_px (property_id, provider, style, parent_style),
GTK_CSS_PX);
case GTK_CSS_REM:
return gtk_css_dimension_value_new (value *
gtk_css_font_size_get_default_px (provider, style),
GTK_CSS_PX);
case GTK_CSS_RAD:
return gtk_css_dimension_value_new (value * 360.0 / (2 * G_PI),
GTK_CSS_DEG);
case GTK_CSS_GRAD:
return gtk_css_dimension_value_new (value * 360.0 / 400.0,
GTK_CSS_DEG);
case GTK_CSS_TURN:
return gtk_css_dimension_value_new (value * 360.0,
GTK_CSS_DEG);
case GTK_CSS_MS:
return gtk_css_dimension_value_new (value / 1000.0,
GTK_CSS_S);
default:
g_assert_not_reached();
}
}
static gboolean
gtk_css_value_number_equal (const GtkCssValue *val1,
const GtkCssValue *val2)
{
guint i;
if (val1->type != val2->type)
return FALSE;
if (G_LIKELY (val1->type == TYPE_DIMENSION))
{
return val1->dimension.unit == val2->dimension.unit &&
val1->dimension.value == val2->dimension.value;
}
g_assert (val1->type == TYPE_CALC);
if (val1->calc.n_terms != val2->calc.n_terms)
return FALSE;
for (i = 0; i < val1->calc.n_terms; i++)
{
if (!_gtk_css_value_equal (val1->calc.terms[i], val2->calc.terms[i]))
return FALSE;
}
return TRUE;
}
static void
gtk_css_value_number_print (const GtkCssValue *value,
GString *string)
{
guint i;
if (G_LIKELY (value->type == TYPE_DIMENSION))
{
const char *names[] = {
/* [GTK_CSS_NUMBER] = */ "",
/* [GTK_CSS_PERCENT] = */ "%",
/* [GTK_CSS_PX] = */ "px",
/* [GTK_CSS_PT] = */ "pt",
/* [GTK_CSS_EM] = */ "em",
/* [GTK_CSS_EX] = */ "ex",
/* [GTK_CSS_REM] = */ "rem",
/* [GTK_CSS_PC] = */ "pc",
/* [GTK_CSS_IN] = */ "in",
/* [GTK_CSS_CM] = */ "cm",
/* [GTK_CSS_MM] = */ "mm",
/* [GTK_CSS_RAD] = */ "rad",
/* [GTK_CSS_DEG] = */ "deg",
/* [GTK_CSS_GRAD] = */ "grad",
/* [GTK_CSS_TURN] = */ "turn",
/* [GTK_CSS_S] = */ "s",
/* [GTK_CSS_MS] = */ "ms",
};
char buf[G_ASCII_DTOSTR_BUF_SIZE];
if (isinf (value->dimension.value))
g_string_append (string, "infinite");
else
{
g_ascii_dtostr (buf, sizeof (buf), value->dimension.value);
g_string_append (string, buf);
if (value->dimension.value != 0.0)
g_string_append (string, names[value->dimension.unit]);
}
return;
}
g_assert (value->type == TYPE_CALC);
g_string_append (string, "calc(");
_gtk_css_value_print (value->calc.terms[0], string);
for (i = 1; i < value->calc.n_terms; i++)
{
g_string_append (string, " + ");
_gtk_css_value_print (value->calc.terms[i], string);
}
g_string_append (string, ")");
}
static GtkCssValue *
gtk_css_value_number_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
GtkCssValue *result, *mul_start, *mul_end;
if (start == end)
return _gtk_css_value_ref (start);
if (G_LIKELY (start->type == TYPE_DIMENSION && end->type == TYPE_DIMENSION))
{
if (start->dimension.unit == end->dimension.unit)
{
const double start_value = start->dimension.value;
const double end_value = end->dimension.value;
return gtk_css_dimension_value_new (start_value + (end_value - start_value) * progress,
start->dimension.unit);
}
}
mul_start = gtk_css_number_value_multiply (start, 1 - progress);
mul_end = gtk_css_number_value_multiply (end, progress);
result = gtk_css_number_value_add (mul_start, mul_end);
_gtk_css_value_unref (mul_start);
_gtk_css_value_unref (mul_end);
return result;
}
static const GtkCssValueClass GTK_CSS_VALUE_NUMBER = {
"GtkCssNumberValue",
gtk_css_value_number_free,
gtk_css_value_number_compute,
gtk_css_value_number_equal,
gtk_css_value_number_transition,
NULL,
NULL,
gtk_css_value_number_print
};
static gsize
gtk_css_value_calc_get_size (gsize n_terms)
{
g_assert (n_terms > 0);
return sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (n_terms - 1);
}
static GtkCssValue *
gtk_css_calc_value_new (guint n_terms)
{
GtkCssValue *result;
result = _gtk_css_value_alloc (&GTK_CSS_VALUE_NUMBER,
gtk_css_value_calc_get_size (n_terms));
result->type = TYPE_CALC;
result->calc.n_terms = n_terms;
return result;
}
GtkCssValue *
gtk_css_dimension_value_new (double value,
GtkCssUnit unit)
{
static GtkCssValue number_singletons[] = {
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_NUMBER, 0 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_NUMBER, 1 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_NUMBER, 96 }} }, /* DPI default */
};
static GtkCssValue px_singletons[] = {
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 0 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 1 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 2 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 3 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 4 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 8 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 16 }} }, /* Icon size default */
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 32 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PX, 64 }} },
};
static GtkCssValue percent_singletons[] = {
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_PERCENT, 0 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, FALSE, TYPE_DIMENSION, {{ GTK_CSS_PERCENT, 50 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, FALSE, TYPE_DIMENSION, {{ GTK_CSS_PERCENT, 100 }} },
};
static GtkCssValue second_singletons[] = {
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_S, 0 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_S, 1 }} },
};
static GtkCssValue deg_singletons[] = {
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_DEG, 0 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_DEG, 90 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_DEG, 180 }} },
{ &GTK_CSS_VALUE_NUMBER, 1, TRUE, TYPE_DIMENSION, {{ GTK_CSS_DEG, 270 }} },
};
GtkCssValue *result;
switch ((guint)unit)
{
case GTK_CSS_NUMBER:
if (value == 0 || value == 1)
return _gtk_css_value_ref (&number_singletons[(int) value]);
if (value == 96)
return _gtk_css_value_ref (&number_singletons[2]);
break;
case GTK_CSS_PX:
if (value == 0 ||
value == 1 ||
value == 2 ||
value == 3 ||
value == 4)
return _gtk_css_value_ref (&px_singletons[(int) value]);
if (value == 8)
return _gtk_css_value_ref (&px_singletons[5]);
if (value == 16)
return _gtk_css_value_ref (&px_singletons[6]);
if (value == 32)
return _gtk_css_value_ref (&px_singletons[7]);
if (value == 64)
return _gtk_css_value_ref (&px_singletons[8]);
break;
case GTK_CSS_PERCENT:
if (value == 0)
return _gtk_css_value_ref (&percent_singletons[0]);
if (value == 50)
return _gtk_css_value_ref (&percent_singletons[1]);
if (value == 100)
return _gtk_css_value_ref (&percent_singletons[2]);
break;
case GTK_CSS_S:
if (value == 0 || value == 1)
return _gtk_css_value_ref (&second_singletons[(int)value]);
break;
case GTK_CSS_DEG:
if (value == 0)
return _gtk_css_value_ref (&deg_singletons[0]);
if (value == 90)
return _gtk_css_value_ref (&deg_singletons[1]);
if (value == 180)
return _gtk_css_value_ref (&deg_singletons[2]);
if (value == 270)
return _gtk_css_value_ref (&deg_singletons[3]);
break;
default:
;
}
result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_NUMBER);
result->type = TYPE_DIMENSION;
result->dimension.unit = unit;
result->dimension.value = value;
result->is_computed = value == 0 ||
unit == GTK_CSS_NUMBER ||
unit == GTK_CSS_PX ||
unit == GTK_CSS_DEG ||
unit == GTK_CSS_S;
return result;
}
/*
* gtk_css_number_value_get_calc_term_order:
* @value: Value to compute order for
*
* Determines the position of @value when printed as part of a calc()
* expression. Values with lower numbers are printed first. Note that
* these numbers are arbitrary, so when adding new types of values to
* print, feel free to change them in implementations so that they
* match.
*
* Returns: Magic value determining placement when printing calc()
* expression.
*/
static int
gtk_css_number_value_get_calc_term_order (const GtkCssValue *value)
{
if (G_LIKELY (value->type == TYPE_DIMENSION))
{
/* note: the order is alphabetic */
static const guint order_per_unit[] = {
/* [GTK_CSS_NUMBER] = */ 0,
/* [GTK_CSS_PERCENT] = */ 16,
/* [GTK_CSS_PX] = */ 11,
/* [GTK_CSS_PT] = */ 10,
/* [GTK_CSS_EM] = */ 3,
/* [GTK_CSS_EX] = */ 4,
/* [GTK_CSS_REM] = */ 13,
/* [GTK_CSS_PC] = */ 9,
/* [GTK_CSS_IN] = */ 6,
/* [GTK_CSS_CM] = */ 1,
/* [GTK_CSS_MM] = */ 7,
/* [GTK_CSS_RAD] = */ 12,
/* [GTK_CSS_DEG] = */ 2,
/* [GTK_CSS_GRAD] = */ 5,
/* [GTK_CSS_TURN] = */ 15,
/* [GTK_CSS_S] = */ 14,
/* [GTK_CSS_MS] = */ 8
};
return 1000 + order_per_unit[value->dimension.unit];
}
g_assert (value->type == TYPE_CALC);
/* This should never be needed because calc() can't contain calc(),
* but eh...
*/
return 0;
}
static void
gtk_css_calc_array_add (GPtrArray *array, GtkCssValue *value)
{
gsize i;
int calc_term_order;
calc_term_order = gtk_css_number_value_get_calc_term_order (value);
for (i = 0; i < array->len; i++)
{
GtkCssValue *sum = gtk_css_number_value_try_add (g_ptr_array_index (array, i), value);
if (sum)
{
g_ptr_array_index (array, i) = sum;
_gtk_css_value_unref (value);
return;
}
else if (gtk_css_number_value_get_calc_term_order (g_ptr_array_index (array, i)) > calc_term_order)
{
g_ptr_array_insert (array, i, value);
return;
}
}
g_ptr_array_add (array, value);
}
static GtkCssValue *
gtk_css_calc_value_new_sum (GtkCssValue *value1,
GtkCssValue *value2)
{
GPtrArray *array;
GtkCssValue *result;
gsize i;
array = g_ptr_array_new ();
if (value1->class == &GTK_CSS_VALUE_NUMBER &&
value1->type == TYPE_CALC)
{
for (i = 0; i < value1->calc.n_terms; i++)
{
gtk_css_calc_array_add (array, _gtk_css_value_ref (value1->calc.terms[i]));
}
}
else
{
gtk_css_calc_array_add (array, _gtk_css_value_ref (value1));
}
if (value2->class == &GTK_CSS_VALUE_NUMBER &&
value2->type == TYPE_CALC)
{
for (i = 0; i < value2->calc.n_terms; i++)
{
gtk_css_calc_array_add (array, _gtk_css_value_ref (value2->calc.terms[i]));
}
}
else
{
gtk_css_calc_array_add (array, _gtk_css_value_ref (value2));
}
result = gtk_css_calc_value_new_from_array ((GtkCssValue **)array->pdata, array->len);
g_ptr_array_free (array, TRUE);
return result;
}
GtkCssDimension
gtk_css_number_value_get_dimension (const GtkCssValue *value)
{
GtkCssDimension dimension = GTK_CSS_DIMENSION_PERCENTAGE;
guint i;
if (G_LIKELY (value->type == TYPE_DIMENSION))
return gtk_css_unit_get_dimension (value->dimension.unit);
g_assert (value->type == TYPE_CALC);
for (i = 0; i < value->calc.n_terms && dimension == GTK_CSS_DIMENSION_PERCENTAGE; i++)
{
dimension = gtk_css_number_value_get_dimension (value->calc.terms[i]);
if (dimension != GTK_CSS_DIMENSION_PERCENTAGE)
break;
}
return dimension;
}
gboolean
gtk_css_number_value_has_percent (const GtkCssValue *value)
{
guint i;
if (G_LIKELY (value->type == TYPE_DIMENSION))
{
return gtk_css_unit_get_dimension (value->dimension.unit) == GTK_CSS_DIMENSION_PERCENTAGE;
}
for (i = 0; i < value->calc.n_terms; i++)
{
if (gtk_css_number_value_has_percent (value->calc.terms[i]))
return TRUE;
}
return FALSE;
}
GtkCssValue *
gtk_css_number_value_multiply (GtkCssValue *value,
double factor)
{
GtkCssValue *result;
guint i;
if (factor == 1)
return _gtk_css_value_ref (value);
if (G_LIKELY (value->type == TYPE_DIMENSION))
{
return gtk_css_dimension_value_new (value->dimension.value * factor,
value->dimension.unit);
}
g_assert (value->type == TYPE_CALC);
result = gtk_css_calc_value_new (value->calc.n_terms);
for (i = 0; i < value->calc.n_terms; i++)
result->calc.terms[i] = gtk_css_number_value_multiply (value->calc.terms[i], factor);
return result;
}
GtkCssValue *
gtk_css_number_value_add (GtkCssValue *value1,
GtkCssValue *value2)
{
GtkCssValue *sum;
sum = gtk_css_number_value_try_add (value1, value2);
if (sum == NULL)
sum = gtk_css_calc_value_new_sum (value1, value2);
return sum;
}
GtkCssValue *
gtk_css_number_value_try_add (GtkCssValue *value1,
GtkCssValue *value2)
{
if (G_UNLIKELY (value1->type != value2->type))
return NULL;
if (G_LIKELY (value1->type == TYPE_DIMENSION))
{
if (value1->dimension.unit != value2->dimension.unit)
return NULL;
if (value1->dimension.value == 0)
return _gtk_css_value_ref (value2);
if (value2->dimension.value == 0)
return _gtk_css_value_ref (value1);
return gtk_css_dimension_value_new (value1->dimension.value + value2->dimension.value,
value1->dimension.unit);
}
g_assert (value1->type == TYPE_CALC);
/* Not possible for calc() values */
return NULL;
}
GtkCssValue *
_gtk_css_number_value_new (double value,
GtkCssUnit unit)
{
return gtk_css_dimension_value_new (value, unit);
}
gboolean
gtk_css_number_value_can_parse (GtkCssParser *parser)
{
return gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_SIGNED_NUMBER)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_SIGNLESS_NUMBER)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_SIGNED_INTEGER)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_SIGNLESS_INTEGER)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_PERCENTAGE)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_SIGNED_INTEGER_DIMENSION)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_SIGNLESS_INTEGER_DIMENSION)
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_DIMENSION)
|| gtk_css_parser_has_function (parser, "calc");
}
GtkCssValue *
_gtk_css_number_value_parse (GtkCssParser *parser,
GtkCssNumberParseFlags flags)
{
if (gtk_css_parser_has_function (parser, "calc"))
return gtk_css_calc_value_parse (parser, flags);
return gtk_css_dimension_value_parse (parser, flags);
}
double
_gtk_css_number_value_get (const GtkCssValue *value,
double one_hundred_percent)
{
double result;
guint i;
if (G_LIKELY (value->type == TYPE_DIMENSION))
{
if (value->dimension.unit == GTK_CSS_PERCENT)
return value->dimension.value * one_hundred_percent / 100;
else
return value->dimension.value;
}
g_assert (value->type == TYPE_CALC);
result = 0.0;
for (i = 0; i < value->calc.n_terms; i++)
result += _gtk_css_number_value_get (value->calc.terms[i], one_hundred_percent);
return result;
}
gboolean
gtk_css_dimension_value_is_zero (const GtkCssValue *value)
{
if (!value)
return TRUE;
if (value->class != &GTK_CSS_VALUE_NUMBER)
return FALSE;
if (value->type != TYPE_DIMENSION)
return FALSE;
return value->dimension.value == 0;
}
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