gtk2/gtk/gtkcssarrayvalue.c

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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* 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 "gtkcssarrayvalueprivate.h"
#include "gtkcssimagevalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include <string.h>
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
guint n_values;
GtkCssValue *values[1];
};
static void
gtk_css_value_array_free (GtkCssValue *value)
{
guint i;
for (i = 0; i < value->n_values; i++)
{
_gtk_css_value_unref (value->values[i]);
}
g_slice_free1 (sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (value->n_values - 1), value);
}
static GtkCssValue *
gtk_css_value_array_compute (GtkCssValue *value,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssComputedValues *values,
GtkCssComputedValues *parent_values,
GtkCssDependencies *dependencies)
{
GtkCssValue *result;
gboolean changed = FALSE;
guint i;
GtkCssDependencies child_deps;
if (value->n_values == 0)
return _gtk_css_value_ref (value);
result = _gtk_css_array_value_new_from_array (value->values, value->n_values);
for (i = 0; i < value->n_values; i++)
{
result->values[i] = _gtk_css_value_compute (value->values[i], property_id, provider, values, parent_values, &child_deps);
*dependencies = _gtk_css_dependencies_union (*dependencies, child_deps);
changed |= (result->values[i] != value->values[i]);
}
if (!changed)
{
_gtk_css_value_unref (result);
return _gtk_css_value_ref (value);
}
return result;
}
static gboolean
gtk_css_value_array_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
guint i;
if (value1->n_values != value2->n_values)
return FALSE;
for (i = 0; i < value1->n_values; i++)
{
if (!_gtk_css_value_equal (value1->values[i],
value2->values[i]))
return FALSE;
}
return TRUE;
}
static guint
gcd (guint a, guint b)
{
while (b != 0)
{
guint t = b;
b = a % b;
a = t;
}
return a;
}
static guint
lcm (guint a, guint b)
{
return a / gcd (a, b) * b;
}
static GtkCssValue *
gtk_css_value_array_transition_repeat (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
GtkCssValue **transitions;
guint i, n;
n = lcm (start->n_values, end->n_values);
transitions = g_newa (GtkCssValue *, n);
for (i = 0; i < n; i++)
{
transitions[i] = _gtk_css_value_transition (start->values[i % start->n_values],
end->values[i % end->n_values],
property_id,
progress);
if (transitions[i] == NULL)
{
while (i--)
_gtk_css_value_unref (transitions[i]);
return NULL;
}
}
return _gtk_css_array_value_new_from_array (transitions, n);
}
static GtkCssValue *
gtk_css_array_value_create_default_transition_value (guint property_id)
{
switch (property_id)
{
case GTK_CSS_PROPERTY_BACKGROUND_IMAGE:
return _gtk_css_image_value_new (NULL);
default:
g_return_val_if_reached (NULL);
}
}
static GtkCssValue *
gtk_css_value_array_transition_extend (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
GtkCssValue **transitions;
guint i, n;
n = MAX (start->n_values, end->n_values);
transitions = g_newa (GtkCssValue *, n);
for (i = 0; i < MIN (start->n_values, end->n_values); i++)
{
transitions[i] = _gtk_css_value_transition (start->values[i],
end->values[i],
property_id,
progress);
if (transitions[i] == NULL)
{
while (i--)
_gtk_css_value_unref (transitions[i]);
return NULL;
}
}
if (start->n_values != end->n_values)
{
GtkCssValue *default_value;
default_value = gtk_css_array_value_create_default_transition_value (property_id);
for (; i < start->n_values; i++)
{
transitions[i] = _gtk_css_value_transition (start->values[i],
default_value,
property_id,
progress);
if (transitions[i] == NULL)
{
while (i--)
_gtk_css_value_unref (transitions[i]);
return NULL;
}
}
for (; i < end->n_values; i++)
{
transitions[i] = _gtk_css_value_transition (default_value,
end->values[i],
property_id,
progress);
if (transitions[i] == NULL)
{
while (i--)
_gtk_css_value_unref (transitions[i]);
return NULL;
}
}
}
g_assert (i == n);
return _gtk_css_array_value_new_from_array (transitions, n);
}
static GtkCssValue *
gtk_css_value_array_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
switch (property_id)
{
case GTK_CSS_PROPERTY_BACKGROUND_CLIP:
case GTK_CSS_PROPERTY_BACKGROUND_ORIGIN:
case GTK_CSS_PROPERTY_BACKGROUND_SIZE:
case GTK_CSS_PROPERTY_BACKGROUND_POSITION:
case GTK_CSS_PROPERTY_BACKGROUND_REPEAT:
return gtk_css_value_array_transition_repeat (start, end, property_id, progress);
case GTK_CSS_PROPERTY_BACKGROUND_IMAGE:
return gtk_css_value_array_transition_extend (start, end, property_id, progress);
case GTK_CSS_PROPERTY_COLOR:
case GTK_CSS_PROPERTY_FONT_SIZE:
case GTK_CSS_PROPERTY_BACKGROUND_COLOR:
case GTK_CSS_PROPERTY_FONT_FAMILY:
case GTK_CSS_PROPERTY_FONT_STYLE:
case GTK_CSS_PROPERTY_FONT_VARIANT:
case GTK_CSS_PROPERTY_FONT_WEIGHT:
case GTK_CSS_PROPERTY_TEXT_SHADOW:
case GTK_CSS_PROPERTY_ICON_SHADOW:
case GTK_CSS_PROPERTY_BOX_SHADOW:
case GTK_CSS_PROPERTY_MARGIN_TOP:
case GTK_CSS_PROPERTY_MARGIN_LEFT:
case GTK_CSS_PROPERTY_MARGIN_BOTTOM:
case GTK_CSS_PROPERTY_MARGIN_RIGHT:
case GTK_CSS_PROPERTY_PADDING_TOP:
case GTK_CSS_PROPERTY_PADDING_LEFT:
case GTK_CSS_PROPERTY_PADDING_BOTTOM:
case GTK_CSS_PROPERTY_PADDING_RIGHT:
case GTK_CSS_PROPERTY_BORDER_TOP_STYLE:
case GTK_CSS_PROPERTY_BORDER_TOP_WIDTH:
case GTK_CSS_PROPERTY_BORDER_LEFT_STYLE:
case GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH:
case GTK_CSS_PROPERTY_BORDER_BOTTOM_STYLE:
case GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH:
case GTK_CSS_PROPERTY_BORDER_RIGHT_STYLE:
case GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH:
case GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS:
case GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS:
case GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS:
case GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS:
case GTK_CSS_PROPERTY_OUTLINE_STYLE:
case GTK_CSS_PROPERTY_OUTLINE_WIDTH:
case GTK_CSS_PROPERTY_OUTLINE_OFFSET:
case GTK_CSS_PROPERTY_BORDER_TOP_COLOR:
case GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR:
case GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR:
case GTK_CSS_PROPERTY_BORDER_LEFT_COLOR:
case GTK_CSS_PROPERTY_OUTLINE_COLOR:
case GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE:
case GTK_CSS_PROPERTY_BORDER_IMAGE_REPEAT:
case GTK_CSS_PROPERTY_BORDER_IMAGE_SLICE:
case GTK_CSS_PROPERTY_BORDER_IMAGE_WIDTH:
case GTK_CSS_PROPERTY_ENGINE:
default:
/* keep all values that are not arrays here, so we get a warning if we ever turn them
* into arrays and start animating them. */
g_warning ("Don't know how to transition arrays for property '%s'",
_gtk_style_property_get_name (GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (property_id))));
case GTK_CSS_PROPERTY_TRANSITION_PROPERTY:
case GTK_CSS_PROPERTY_TRANSITION_DURATION:
case GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION:
case GTK_CSS_PROPERTY_TRANSITION_DELAY:
case GTK_CSS_PROPERTY_GTK_KEY_BINDINGS:
return NULL;
}
}
static void
gtk_css_value_array_print (const GtkCssValue *value,
GString *string)
{
guint i;
if (value->n_values == 0)
{
g_string_append (string, "none");
return;
}
for (i = 0; i < value->n_values; i++)
{
if (i > 0)
g_string_append (string, ", ");
_gtk_css_value_print (value->values[i], string);
}
}
static const GtkCssValueClass GTK_CSS_VALUE_ARRAY = {
gtk_css_value_array_free,
gtk_css_value_array_compute,
gtk_css_value_array_equal,
gtk_css_value_array_transition,
gtk_css_value_array_print
};
GtkCssValue *
_gtk_css_array_value_new (GtkCssValue *content)
{
g_return_val_if_fail (content != NULL, NULL);
return _gtk_css_array_value_new_from_array (&content, 1);
}
GtkCssValue *
_gtk_css_array_value_new_from_array (GtkCssValue **values,
guint n_values)
{
GtkCssValue *result;
g_return_val_if_fail (values != NULL, NULL);
g_return_val_if_fail (n_values > 0, NULL);
result = _gtk_css_value_alloc (&GTK_CSS_VALUE_ARRAY, sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (n_values - 1));
result->n_values = n_values;
memcpy (&result->values[0], values, sizeof (GtkCssValue *) * n_values);
return result;
}
GtkCssValue *
_gtk_css_array_value_parse (GtkCssParser *parser,
GtkCssValue *(* parse_func) (GtkCssParser *parser))
{
GtkCssValue *value, *result;
GPtrArray *values;
values = g_ptr_array_new ();
do {
value = parse_func (parser);
if (value == NULL)
{
g_ptr_array_set_free_func (values, (GDestroyNotify) _gtk_css_value_unref);
g_ptr_array_free (values, TRUE);
return NULL;
}
g_ptr_array_add (values, value);
} while (_gtk_css_parser_try (parser, ",", TRUE));
result = _gtk_css_array_value_new_from_array ((GtkCssValue **) values->pdata, values->len);
g_ptr_array_free (values, TRUE);
return result;
}
GtkCssValue *
_gtk_css_array_value_get_nth (const GtkCssValue *value,
guint i)
{
g_return_val_if_fail (value != NULL, NULL);
g_return_val_if_fail (value->class == &GTK_CSS_VALUE_ARRAY, NULL);
g_return_val_if_fail (value->n_values > 0, NULL);
return value->values[i % value->n_values];
}
guint
_gtk_css_array_value_get_n_values (const GtkCssValue *value)
{
g_return_val_if_fail (value != NULL, 0);
g_return_val_if_fail (value->class == &GTK_CSS_VALUE_ARRAY, 0);
return value->n_values;
}