gtk2/gtk/gtkcssshadowsvalue.c
Benjamin Otte 2480e0d575 gsk: Add GskShadowNode
... and make the icon rendering code use it.

This requires moving even more shadow renering code into GSK, but so be
it. At least the "shadows not implemented" warning is now gone!
2016-12-20 18:01:12 +01:00

399 lines
10 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* Author: Cosimo Cecchi <cosimoc@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 "gtkcssshadowsvalueprivate.h"
#include <math.h>
#include "gtkcssshadowvalueprivate.h"
#include <string.h>
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
guint len;
GtkCssValue *values[1];
};
static GtkCssValue * gtk_css_shadows_value_new (GtkCssValue **values,
guint len);
static void
gtk_css_value_shadows_free (GtkCssValue *value)
{
guint i;
for (i = 0; i < value->len; i++)
{
_gtk_css_value_unref (value->values[i]);
}
g_slice_free1 (sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (value->len - 1), value);
}
static GtkCssValue *
gtk_css_value_shadows_compute (GtkCssValue *value,
guint property_id,
GtkStyleProviderPrivate *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
GtkCssValue *result, *tmp;
guint i, j;
if (value->len == 0)
return _gtk_css_value_ref (value);
result = NULL;
for (i = 0; i < value->len; i++)
{
tmp = _gtk_css_value_compute (value->values[i], property_id, provider, style, parent_style);
if (result)
{
result->values[i] = tmp;
}
else if (tmp != value->values[i])
{
result = gtk_css_shadows_value_new (value->values, value->len);
for (j = 0; j < i; j++)
{
_gtk_css_value_ref (result->values[j]);
}
result->values[i] = tmp;
}
else
{
_gtk_css_value_unref (tmp);
}
}
if (result != NULL)
return result;
else
return _gtk_css_value_ref (value);
}
static gboolean
gtk_css_value_shadows_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
guint i;
/* XXX: Should we fill up here? */
if (value1->len != value2->len)
return FALSE;
for (i = 0; i < value1->len; i++)
{
if (!_gtk_css_value_equal (value1->values[i],
value2->values[i]))
return FALSE;
}
return TRUE;
}
static GtkCssValue *
gtk_css_value_shadows_transition (GtkCssValue *start,
GtkCssValue *end,
guint property_id,
double progress)
{
guint i, len;
GtkCssValue **values;
/* catches the important case of 2 none values */
if (start == end)
return _gtk_css_value_ref (start);
if (start->len > end->len)
len = start->len;
else
len = end->len;
values = g_newa (GtkCssValue *, len);
for (i = 0; i < MIN (start->len, end->len); i++)
{
values[i] = _gtk_css_value_transition (start->values[i], end->values[i], property_id, progress);
if (values[i] == NULL)
{
while (i--)
_gtk_css_value_unref (values[i]);
return NULL;
}
}
if (start->len > end->len)
{
for (; i < len; i++)
{
GtkCssValue *fill = _gtk_css_shadow_value_new_for_transition (start->values[i]);
values[i] = _gtk_css_value_transition (start->values[i], fill, property_id, progress);
_gtk_css_value_unref (fill);
if (values[i] == NULL)
{
while (i--)
_gtk_css_value_unref (values[i]);
return NULL;
}
}
}
else
{
for (; i < len; i++)
{
GtkCssValue *fill = _gtk_css_shadow_value_new_for_transition (end->values[i]);
values[i] = _gtk_css_value_transition (fill, end->values[i], property_id, progress);
_gtk_css_value_unref (fill);
if (values[i] == NULL)
{
while (i--)
_gtk_css_value_unref (values[i]);
return NULL;
}
}
}
return gtk_css_shadows_value_new (values, len);
}
static void
gtk_css_value_shadows_print (const GtkCssValue *value,
GString *string)
{
guint i;
if (value->len == 0)
{
g_string_append (string, "none");
return;
}
for (i = 0; i < value->len; i++)
{
if (i > 0)
g_string_append (string, ", ");
_gtk_css_value_print (value->values[i], string);
}
}
static const GtkCssValueClass GTK_CSS_VALUE_SHADOWS = {
gtk_css_value_shadows_free,
gtk_css_value_shadows_compute,
gtk_css_value_shadows_equal,
gtk_css_value_shadows_transition,
gtk_css_value_shadows_print
};
static GtkCssValue none_singleton = { &GTK_CSS_VALUE_SHADOWS, 1, 0, { NULL } };
GtkCssValue *
_gtk_css_shadows_value_new_none (void)
{
return _gtk_css_value_ref (&none_singleton);
}
static GtkCssValue *
gtk_css_shadows_value_new (GtkCssValue **values,
guint len)
{
GtkCssValue *result;
g_return_val_if_fail (values != NULL, NULL);
g_return_val_if_fail (len > 0, NULL);
result = _gtk_css_value_alloc (&GTK_CSS_VALUE_SHADOWS, sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (len - 1));
result->len = len;
memcpy (&result->values[0], values, sizeof (GtkCssValue *) * len);
return result;
}
GtkCssValue *
_gtk_css_shadows_value_parse (GtkCssParser *parser,
gboolean box_shadow_mode)
{
GtkCssValue *value, *result;
GPtrArray *values;
if (_gtk_css_parser_try (parser, "none", TRUE))
return _gtk_css_shadows_value_new_none ();
values = g_ptr_array_new ();
do {
value = _gtk_css_shadow_value_parse (parser, box_shadow_mode);
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_shadows_value_new ((GtkCssValue **) values->pdata, values->len);
g_ptr_array_free (values, TRUE);
return result;
}
gboolean
_gtk_css_shadows_value_is_none (const GtkCssValue *shadows)
{
g_return_val_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS, TRUE);
return shadows->len == 0;
}
GskShadow *
gtk_css_shadows_value_get_shadows (const GtkCssValue *shadows,
gsize *n_shadows)
{
GskShadow *result;
guint i;
result = g_new (GskShadow, shadows->len);
for (i = 0; i < shadows->len; i++)
{
gtk_css_shadow_value_get_shadow (shadows->values[i], &result[i]);
}
*n_shadows = shadows->len;
return result;
}
void
_gtk_css_shadows_value_paint_layout (const GtkCssValue *shadows,
cairo_t *cr,
PangoLayout *layout)
{
guint i;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
_gtk_css_shadow_value_paint_layout (shadows->values[i], cr, layout);
}
}
void
_gtk_css_shadows_value_paint_icon (const GtkCssValue *shadows,
cairo_t *cr)
{
guint i;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
_gtk_css_shadow_value_paint_icon (shadows->values[i], cr);
}
}
void
_gtk_css_shadows_value_paint_box (const GtkCssValue *shadows,
cairo_t *cr,
const GskRoundedRect*padding_box,
gboolean inset)
{
guint i;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
if (inset == _gtk_css_shadow_value_get_inset (shadows->values[i]))
_gtk_css_shadow_value_paint_box (shadows->values[i], cr, padding_box);
}
}
void
gtk_css_shadows_value_snapshot_outset (const GtkCssValue *shadows,
GtkSnapshot *snapshot,
const GskRoundedRect*border_box)
{
guint i;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
if (_gtk_css_shadow_value_get_inset (shadows->values[i]))
continue;
gtk_css_shadow_value_snapshot_outset (shadows->values[i], snapshot, border_box);
}
}
void
gtk_css_shadows_value_snapshot_inset (const GtkCssValue *shadows,
GtkSnapshot *snapshot,
const GskRoundedRect*padding_box)
{
guint i;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
if (!_gtk_css_shadow_value_get_inset (shadows->values[i]))
continue;
gtk_css_shadow_value_snapshot_inset (shadows->values[i], snapshot, padding_box);
}
}
void
_gtk_css_shadows_value_get_extents (const GtkCssValue *shadows,
GtkBorder *border)
{
guint i;
GtkBorder b = { 0 }, sb;
const GtkCssValue *shadow;
g_return_if_fail (shadows->class == &GTK_CSS_VALUE_SHADOWS);
for (i = 0; i < shadows->len; i++)
{
shadow = shadows->values[i];
if (_gtk_css_shadow_value_get_inset (shadow))
continue;
gtk_css_shadow_value_get_extents (shadow, &sb);
b.top = MAX (b.top, sb.top);
b.right = MAX (b.right, sb.right);
b.bottom = MAX (b.bottom, sb.bottom);
b.left = MAX (b.left, sb.left);
}
*border = b;
}