1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2011 Red Hat, Inc.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include "config.h"
19
20 #include "gtkcssinheritvalueprivate.h"
21
22 #include "gtkcssinitialvalueprivate.h"
23 #include "gtkstylecontextprivate.h"
24
25 struct _GtkCssValue {
26 GTK_CSS_VALUE_BASE
27 };
28
29 static void
gtk_css_value_inherit_free(GtkCssValue * value)30 gtk_css_value_inherit_free (GtkCssValue *value)
31 {
32 /* Can only happen if the unique value gets unreffed too often */
33 g_assert_not_reached ();
34 }
35
36 static GtkCssValue *
gtk_css_value_inherit_compute(GtkCssValue * value,guint property_id,GtkStyleProviderPrivate * provider,GtkCssStyle * style,GtkCssStyle * parent_style)37 gtk_css_value_inherit_compute (GtkCssValue *value,
38 guint property_id,
39 GtkStyleProviderPrivate *provider,
40 GtkCssStyle *style,
41 GtkCssStyle *parent_style)
42 {
43 if (parent_style)
44 {
45 return _gtk_css_value_ref (gtk_css_style_get_value (parent_style, property_id));
46 }
47 else
48 {
49 return _gtk_css_value_compute (_gtk_css_initial_value_get (),
50 property_id,
51 provider,
52 style,
53 parent_style);
54 }
55 }
56
57 static gboolean
gtk_css_value_inherit_equal(const GtkCssValue * value1,const GtkCssValue * value2)58 gtk_css_value_inherit_equal (const GtkCssValue *value1,
59 const GtkCssValue *value2)
60 {
61 return TRUE;
62 }
63
64 static GtkCssValue *
gtk_css_value_inherit_transition(GtkCssValue * start,GtkCssValue * end,guint property_id,double progress)65 gtk_css_value_inherit_transition (GtkCssValue *start,
66 GtkCssValue *end,
67 guint property_id,
68 double progress)
69 {
70 return NULL;
71 }
72
73 static void
gtk_css_value_inherit_print(const GtkCssValue * value,GString * string)74 gtk_css_value_inherit_print (const GtkCssValue *value,
75 GString *string)
76 {
77 g_string_append (string, "inherit");
78 }
79
80 static const GtkCssValueClass GTK_CSS_VALUE_INHERIT = {
81 gtk_css_value_inherit_free,
82 gtk_css_value_inherit_compute,
83 gtk_css_value_inherit_equal,
84 gtk_css_value_inherit_transition,
85 gtk_css_value_inherit_print
86 };
87
88 static GtkCssValue inherit = { >K_CSS_VALUE_INHERIT, 1 };
89
90 GtkCssValue *
_gtk_css_inherit_value_new(void)91 _gtk_css_inherit_value_new (void)
92 {
93 return _gtk_css_value_ref (&inherit);
94 }
95
96 GtkCssValue *
_gtk_css_inherit_value_get(void)97 _gtk_css_inherit_value_get (void)
98 {
99 return &inherit;
100 }
101