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 "gtkcssimagevalueprivate.h"
21
22 #include "gtkcssimagecrossfadeprivate.h"
23
24 struct _GtkCssValue {
25 GTK_CSS_VALUE_BASE
26 GtkCssImage *image;
27 };
28
29 static void
gtk_css_value_image_free(GtkCssValue * value)30 gtk_css_value_image_free (GtkCssValue *value)
31 {
32 g_object_unref (value->image);
33 g_slice_free (GtkCssValue, value);
34 }
35
36 static GtkCssValue *
gtk_css_value_image_compute(GtkCssValue * value,guint property_id,GtkStyleProviderPrivate * provider,GtkCssStyle * style,GtkCssStyle * parent_style)37 gtk_css_value_image_compute (GtkCssValue *value,
38 guint property_id,
39 GtkStyleProviderPrivate *provider,
40 GtkCssStyle *style,
41 GtkCssStyle *parent_style)
42 {
43 GtkCssImage *image, *computed;
44
45 image = _gtk_css_image_value_get_image (value);
46
47 if (image == NULL)
48 return _gtk_css_value_ref (value);
49
50 computed = _gtk_css_image_compute (image, property_id, provider, style, parent_style);
51
52 if (computed == image)
53 {
54 g_object_unref (computed);
55 return _gtk_css_value_ref (value);
56 }
57
58 return _gtk_css_image_value_new (computed);
59 }
60
61 static gboolean
gtk_css_value_image_equal(const GtkCssValue * value1,const GtkCssValue * value2)62 gtk_css_value_image_equal (const GtkCssValue *value1,
63 const GtkCssValue *value2)
64 {
65 return _gtk_css_image_equal (value1->image, value2->image);
66 }
67
68 static GtkCssValue *
gtk_css_value_image_transition(GtkCssValue * start,GtkCssValue * end,guint property_id,double progress)69 gtk_css_value_image_transition (GtkCssValue *start,
70 GtkCssValue *end,
71 guint property_id,
72 double progress)
73 {
74 GtkCssImage *transition;
75
76 transition = _gtk_css_image_transition (_gtk_css_image_value_get_image (start),
77 _gtk_css_image_value_get_image (end),
78 property_id,
79 progress);
80
81 return _gtk_css_image_value_new (transition);
82 }
83
84 static void
gtk_css_value_image_print(const GtkCssValue * value,GString * string)85 gtk_css_value_image_print (const GtkCssValue *value,
86 GString *string)
87 {
88 if (value->image)
89 _gtk_css_image_print (value->image, string);
90 else
91 g_string_append (string, "none");
92 }
93
94 static const GtkCssValueClass GTK_CSS_VALUE_IMAGE = {
95 gtk_css_value_image_free,
96 gtk_css_value_image_compute,
97 gtk_css_value_image_equal,
98 gtk_css_value_image_transition,
99 gtk_css_value_image_print
100 };
101
102 GtkCssValue *
_gtk_css_image_value_new(GtkCssImage * image)103 _gtk_css_image_value_new (GtkCssImage *image)
104 {
105 static GtkCssValue none_singleton = { >K_CSS_VALUE_IMAGE, 1, NULL };
106 GtkCssValue *value;
107
108 if (image == NULL)
109 return _gtk_css_value_ref (&none_singleton);
110
111 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_IMAGE);
112 value->image = image;
113
114 return value;
115 }
116
117 GtkCssImage *
_gtk_css_image_value_get_image(const GtkCssValue * value)118 _gtk_css_image_value_get_image (const GtkCssValue *value)
119 {
120 g_return_val_if_fail (value->class == >K_CSS_VALUE_IMAGE, NULL);
121
122 return value->image;
123 }
124
125