forked from AuroraMiddleware/gtk
488 lines
12 KiB
C
488 lines
12 KiB
C
/* GTK - The GIMP Toolkit
|
|
* Copyright © 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 "gtkcsscalcvalueprivate.h"
|
|
|
|
#include <string.h>
|
|
|
|
struct _GtkCssValue {
|
|
GTK_CSS_VALUE_BASE
|
|
gsize n_terms;
|
|
GtkCssValue * terms[1];
|
|
};
|
|
|
|
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 void
|
|
gtk_css_value_calc_free (GtkCssValue *value)
|
|
{
|
|
gsize i;
|
|
|
|
for (i = 0; i < value->n_terms; i++)
|
|
{
|
|
_gtk_css_value_unref (value->terms[i]);
|
|
}
|
|
|
|
g_slice_free1 (gtk_css_value_calc_get_size (value->n_terms), value);
|
|
}
|
|
|
|
static GtkCssValue *gtk_css_calc_value_new (gsize n_terms);
|
|
|
|
static GtkCssValue *
|
|
gtk_css_value_new_from_array (GPtrArray *array)
|
|
{
|
|
GtkCssValue *result;
|
|
|
|
if (array->len > 1)
|
|
{
|
|
result = gtk_css_calc_value_new (array->len);
|
|
memcpy (result->terms, array->pdata, array->len * sizeof (GtkCssValue *));
|
|
}
|
|
else
|
|
{
|
|
result = g_ptr_array_index (array, 0);
|
|
}
|
|
|
|
g_ptr_array_free (array, TRUE);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
gtk_css_calc_array_add (GPtrArray *array, GtkCssValue *value)
|
|
{
|
|
gsize i;
|
|
gint 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_value_calc_compute (GtkCssValue *value,
|
|
guint property_id,
|
|
GtkStyleProviderPrivate *provider,
|
|
GtkCssStyle *style,
|
|
GtkCssStyle *parent_style)
|
|
{
|
|
GtkCssValue *result;
|
|
GPtrArray *array;
|
|
gboolean changed = FALSE;
|
|
gsize i;
|
|
|
|
array = g_ptr_array_new ();
|
|
for (i = 0; i < value->n_terms; i++)
|
|
{
|
|
GtkCssValue *computed = _gtk_css_value_compute (value->terms[i], property_id, provider, style, parent_style);
|
|
changed |= computed != value->terms[i];
|
|
gtk_css_calc_array_add (array, computed);
|
|
}
|
|
|
|
if (changed)
|
|
{
|
|
result = gtk_css_value_new_from_array (array);
|
|
}
|
|
else
|
|
{
|
|
g_ptr_array_set_free_func (array, (GDestroyNotify) _gtk_css_value_unref);
|
|
g_ptr_array_free (array, TRUE);
|
|
result = _gtk_css_value_ref (value);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gtk_css_value_calc_equal (const GtkCssValue *value1,
|
|
const GtkCssValue *value2)
|
|
{
|
|
gsize i;
|
|
|
|
if (value1->n_terms != value2->n_terms)
|
|
return FALSE;
|
|
|
|
for (i = 0; i < value1->n_terms; i++)
|
|
{
|
|
if (!_gtk_css_value_equal (value1->terms[i], value2->terms[i]))
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gtk_css_value_calc_print (const GtkCssValue *value,
|
|
GString *string)
|
|
{
|
|
gsize i;
|
|
|
|
g_string_append (string, "calc(");
|
|
_gtk_css_value_print (value->terms[0], string);
|
|
|
|
for (i = 1; i < value->n_terms; i++)
|
|
{
|
|
g_string_append (string, " + ");
|
|
_gtk_css_value_print (value->terms[i], string);
|
|
}
|
|
g_string_append (string, ")");
|
|
}
|
|
|
|
static double
|
|
gtk_css_value_calc_get (const GtkCssValue *value,
|
|
double one_hundred_percent)
|
|
{
|
|
double result = 0.0;
|
|
gsize i;
|
|
|
|
for (i = 0; i < value->n_terms; i++)
|
|
{
|
|
result += _gtk_css_number_value_get (value->terms[i], one_hundred_percent);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static GtkCssDimension
|
|
gtk_css_value_calc_get_dimension (const GtkCssValue *value)
|
|
{
|
|
GtkCssDimension dimension = GTK_CSS_DIMENSION_PERCENTAGE;
|
|
gsize i;
|
|
|
|
for (i = 0; i < value->n_terms && dimension == GTK_CSS_DIMENSION_PERCENTAGE; i++)
|
|
{
|
|
dimension = gtk_css_number_value_get_dimension (value->terms[i]);
|
|
}
|
|
|
|
return dimension;
|
|
}
|
|
|
|
static gboolean
|
|
gtk_css_value_calc_has_percent (const GtkCssValue *value)
|
|
{
|
|
gsize i;
|
|
|
|
for (i = 0; i < value->n_terms; i++)
|
|
{
|
|
if (gtk_css_number_value_has_percent (value->terms[i]))
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static GtkCssValue *
|
|
gtk_css_value_calc_multiply (const GtkCssValue *value,
|
|
double factor)
|
|
{
|
|
GtkCssValue *result;
|
|
gsize i;
|
|
|
|
result = gtk_css_calc_value_new (value->n_terms);
|
|
|
|
for (i = 0; i < value->n_terms; i++)
|
|
{
|
|
result->terms[i] = gtk_css_number_value_multiply (value->terms[i], factor);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static GtkCssValue *
|
|
gtk_css_value_calc_try_add (const GtkCssValue *value1,
|
|
const GtkCssValue *value2)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static gint
|
|
gtk_css_value_calc_get_calc_term_order (const GtkCssValue *value)
|
|
{
|
|
/* This should never be needed because calc() can't contain calc(),
|
|
* but eh...
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static const GtkCssNumberValueClass GTK_CSS_VALUE_CALC = {
|
|
{
|
|
gtk_css_value_calc_free,
|
|
gtk_css_value_calc_compute,
|
|
gtk_css_value_calc_equal,
|
|
gtk_css_number_value_transition,
|
|
gtk_css_value_calc_print
|
|
},
|
|
gtk_css_value_calc_get,
|
|
gtk_css_value_calc_get_dimension,
|
|
gtk_css_value_calc_has_percent,
|
|
gtk_css_value_calc_multiply,
|
|
gtk_css_value_calc_try_add,
|
|
gtk_css_value_calc_get_calc_term_order
|
|
};
|
|
|
|
static GtkCssValue *
|
|
gtk_css_calc_value_new (gsize n_terms)
|
|
{
|
|
GtkCssValue *result;
|
|
|
|
result = _gtk_css_value_alloc (>K_CSS_VALUE_CALC.value_class,
|
|
gtk_css_value_calc_get_size (n_terms));
|
|
result->n_terms = n_terms;
|
|
|
|
return result;
|
|
}
|
|
|
|
GtkCssValue *
|
|
gtk_css_calc_value_new_sum (GtkCssValue *value1,
|
|
GtkCssValue *value2)
|
|
{
|
|
GPtrArray *array;
|
|
gsize i;
|
|
|
|
array = g_ptr_array_new ();
|
|
|
|
if (value1->class == >K_CSS_VALUE_CALC.value_class)
|
|
{
|
|
for (i = 0; i < value1->n_terms; i++)
|
|
{
|
|
gtk_css_calc_array_add (array, _gtk_css_value_ref (value1->terms[i]));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
gtk_css_calc_array_add (array, _gtk_css_value_ref (value1));
|
|
}
|
|
|
|
if (value2->class == >K_CSS_VALUE_CALC.value_class)
|
|
{
|
|
for (i = 0; i < value2->n_terms; i++)
|
|
{
|
|
gtk_css_calc_array_add (array, _gtk_css_value_ref (value2->terms[i]));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
gtk_css_calc_array_add (array, _gtk_css_value_ref (value2));
|
|
}
|
|
|
|
return gtk_css_value_new_from_array (array);
|
|
}
|
|
|
|
GtkCssValue * gtk_css_calc_value_parse_sum (GtkCssParser *parser,
|
|
GtkCssNumberParseFlags flags);
|
|
|
|
static GtkCssValue *
|
|
gtk_css_calc_value_parse_value (GtkCssParser *parser,
|
|
GtkCssNumberParseFlags flags)
|
|
{
|
|
if (_gtk_css_parser_has_prefix (parser, "calc"))
|
|
{
|
|
_gtk_css_parser_error (parser, "Nested calc() expressions are not allowed.");
|
|
return NULL;
|
|
}
|
|
|
|
if (_gtk_css_parser_try (parser, "(", TRUE))
|
|
{
|
|
GtkCssValue *result = gtk_css_calc_value_parse_sum (parser, flags);
|
|
if (result == NULL)
|
|
return NULL;
|
|
|
|
if (!_gtk_css_parser_try (parser, ")", TRUE))
|
|
{
|
|
_gtk_css_parser_error (parser, "Missing closing ')' in calc() subterm");
|
|
_gtk_css_value_unref (result);
|
|
return NULL;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
return _gtk_css_number_value_parse (parser, flags);
|
|
}
|
|
|
|
static gboolean
|
|
is_number (GtkCssValue *value)
|
|
{
|
|
return gtk_css_number_value_get_dimension (value) == GTK_CSS_DIMENSION_NUMBER
|
|
&& !gtk_css_number_value_has_percent (value);
|
|
}
|
|
|
|
static GtkCssValue *
|
|
gtk_css_calc_value_parse_product (GtkCssParser *parser,
|
|
GtkCssNumberParseFlags flags)
|
|
{
|
|
GtkCssValue *result, *value, *temp;
|
|
GtkCssNumberParseFlags actual_flags;
|
|
|
|
actual_flags = flags | GTK_CSS_PARSE_NUMBER;
|
|
|
|
result = gtk_css_calc_value_parse_value (parser, actual_flags);
|
|
if (result == NULL)
|
|
return NULL;
|
|
|
|
while (_gtk_css_parser_begins_with (parser, '*') || _gtk_css_parser_begins_with (parser, '/'))
|
|
{
|
|
if (actual_flags != GTK_CSS_PARSE_NUMBER && !is_number (result))
|
|
actual_flags = GTK_CSS_PARSE_NUMBER;
|
|
|
|
if (_gtk_css_parser_try (parser, "*", TRUE))
|
|
{
|
|
value = gtk_css_calc_value_parse_product (parser, actual_flags);
|
|
if (value == NULL)
|
|
goto fail;
|
|
if (is_number (value))
|
|
temp = gtk_css_number_value_multiply (result, _gtk_css_number_value_get (value, 100));
|
|
else
|
|
temp = gtk_css_number_value_multiply (value, _gtk_css_number_value_get (result, 100));
|
|
_gtk_css_value_unref (value);
|
|
_gtk_css_value_unref (result);
|
|
result = temp;
|
|
}
|
|
else if (_gtk_css_parser_try (parser, "/", TRUE))
|
|
{
|
|
value = gtk_css_calc_value_parse_product (parser, GTK_CSS_PARSE_NUMBER);
|
|
if (value == NULL)
|
|
goto fail;
|
|
temp = gtk_css_number_value_multiply (result, 1.0 / _gtk_css_number_value_get (value, 100));
|
|
_gtk_css_value_unref (value);
|
|
_gtk_css_value_unref (result);
|
|
result = temp;
|
|
}
|
|
else
|
|
{
|
|
g_assert_not_reached ();
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (is_number (result) && !(flags & GTK_CSS_PARSE_NUMBER))
|
|
{
|
|
_gtk_css_parser_error (parser, "calc() product term has no units");
|
|
goto fail;
|
|
}
|
|
|
|
return result;
|
|
|
|
fail:
|
|
_gtk_css_value_unref (result);
|
|
return NULL;
|
|
}
|
|
|
|
GtkCssValue *
|
|
gtk_css_calc_value_parse_sum (GtkCssParser *parser,
|
|
GtkCssNumberParseFlags flags)
|
|
{
|
|
GtkCssValue *result;
|
|
|
|
result = gtk_css_calc_value_parse_product (parser, flags);
|
|
if (result == NULL)
|
|
return NULL;
|
|
|
|
while (_gtk_css_parser_begins_with (parser, '+') || _gtk_css_parser_begins_with (parser, '-'))
|
|
{
|
|
GtkCssValue *next, *temp;
|
|
|
|
if (_gtk_css_parser_try (parser, "+", TRUE))
|
|
{
|
|
next = gtk_css_calc_value_parse_product (parser, flags);
|
|
if (next == NULL)
|
|
goto fail;
|
|
}
|
|
else if (_gtk_css_parser_try (parser, "-", TRUE))
|
|
{
|
|
temp = gtk_css_calc_value_parse_product (parser, flags);
|
|
if (temp == NULL)
|
|
goto fail;
|
|
next = gtk_css_number_value_multiply (temp, -1);
|
|
_gtk_css_value_unref (temp);
|
|
}
|
|
else
|
|
{
|
|
g_assert_not_reached ();
|
|
goto fail;
|
|
}
|
|
|
|
temp = gtk_css_number_value_add (result, next);
|
|
_gtk_css_value_unref (result);
|
|
_gtk_css_value_unref (next);
|
|
result = temp;
|
|
}
|
|
|
|
return result;
|
|
|
|
fail:
|
|
_gtk_css_value_unref (result);
|
|
return NULL;
|
|
}
|
|
|
|
GtkCssValue *
|
|
gtk_css_calc_value_parse (GtkCssParser *parser,
|
|
GtkCssNumberParseFlags flags)
|
|
{
|
|
GtkCssValue *value;
|
|
|
|
/* This confuses '*' and '/' so we disallow backwards compat. */
|
|
flags &= ~GTK_CSS_NUMBER_AS_PIXELS;
|
|
/* This can only be handled at compute time, we allow '-' after all */
|
|
flags &= ~GTK_CSS_POSITIVE_ONLY;
|
|
|
|
if (!_gtk_css_parser_try (parser, "calc(", TRUE))
|
|
{
|
|
_gtk_css_parser_error (parser, "Expected 'calc('");
|
|
return NULL;
|
|
}
|
|
|
|
value = gtk_css_calc_value_parse_sum (parser, flags);
|
|
if (value == NULL)
|
|
return NULL;
|
|
|
|
if (!_gtk_css_parser_try (parser, ")", TRUE))
|
|
{
|
|
_gtk_css_value_unref (value);
|
|
_gtk_css_parser_error (parser, "Expected ')' after calc() statement");
|
|
return NULL;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|