1 | /* GTK - The GIMP Toolkit |
2 | * Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org> |
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 "gtkstyleproviderprivate.h" |
21 | |
22 | #include "gtkintl.h" |
23 | #include "gtkprivate.h" |
24 | |
25 | /** |
26 | * GtkStyleProvider: |
27 | * |
28 | * `GtkStyleProvider` is an interface for style information used by |
29 | * `GtkStyleContext`. |
30 | * |
31 | * See [method@Gtk.StyleContext.add_provider] and |
32 | * [func@Gtk.StyleContext.add_provider_for_display] for |
33 | * adding `GtkStyleProviders`. |
34 | * |
35 | * GTK uses the `GtkStyleProvider` implementation for CSS in |
36 | * [class@Gtk.CssProvider]. |
37 | */ |
38 | |
39 | enum { |
40 | CHANGED, |
41 | LAST_SIGNAL |
42 | }; |
43 | |
44 | G_DEFINE_INTERFACE (GtkStyleProvider, gtk_style_provider, G_TYPE_OBJECT) |
45 | |
46 | static guint signals[LAST_SIGNAL]; |
47 | |
48 | static void |
49 | gtk_style_provider_default_init (GtkStyleProviderInterface *iface) |
50 | { |
51 | signals[CHANGED] = g_signal_new (I_("gtk-private-changed" ), |
52 | G_TYPE_FROM_INTERFACE (iface), |
53 | signal_flags: G_SIGNAL_RUN_LAST, |
54 | G_STRUCT_OFFSET (GtkStyleProviderInterface, changed), |
55 | NULL, NULL, |
56 | NULL, |
57 | G_TYPE_NONE, n_params: 0); |
58 | |
59 | } |
60 | |
61 | GtkCssValue * |
62 | gtk_style_provider_get_color (GtkStyleProvider *provider, |
63 | const char *name) |
64 | { |
65 | GtkStyleProviderInterface *iface; |
66 | |
67 | /* for compat with gtk_symbolic_color_resolve() */ |
68 | if (provider == NULL) |
69 | return NULL; |
70 | |
71 | gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), NULL); |
72 | |
73 | iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider); |
74 | |
75 | if (!iface->get_color) |
76 | return NULL; |
77 | |
78 | return iface->get_color (provider, name); |
79 | } |
80 | |
81 | GtkCssKeyframes * |
82 | gtk_style_provider_get_keyframes (GtkStyleProvider *provider, |
83 | const char *name) |
84 | { |
85 | GtkStyleProviderInterface *iface; |
86 | |
87 | gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), NULL); |
88 | gtk_internal_return_val_if_fail (name != NULL, NULL); |
89 | |
90 | iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider); |
91 | |
92 | if (!iface->get_keyframes) |
93 | return NULL; |
94 | |
95 | return iface->get_keyframes (provider, name); |
96 | } |
97 | |
98 | void |
99 | gtk_style_provider_lookup (GtkStyleProvider *provider, |
100 | const GtkCountingBloomFilter *filter, |
101 | GtkCssNode *node, |
102 | GtkCssLookup *lookup, |
103 | GtkCssChange *out_change) |
104 | { |
105 | GtkStyleProviderInterface *iface; |
106 | |
107 | gtk_internal_return_if_fail (GTK_IS_STYLE_PROVIDER (provider)); |
108 | gtk_internal_return_if_fail (GTK_IS_CSS_NODE (node)); |
109 | gtk_internal_return_if_fail (lookup != NULL); |
110 | |
111 | if (out_change) |
112 | *out_change = 0; |
113 | |
114 | iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider); |
115 | |
116 | if (!iface->lookup) |
117 | return; |
118 | |
119 | iface->lookup (provider, filter, node, lookup, out_change); |
120 | } |
121 | |
122 | void |
123 | gtk_style_provider_changed (GtkStyleProvider *provider) |
124 | { |
125 | gtk_internal_return_if_fail (GTK_IS_STYLE_PROVIDER (provider)); |
126 | |
127 | g_signal_emit (instance: provider, signal_id: signals[CHANGED], detail: 0); |
128 | } |
129 | |
130 | GtkSettings * |
131 | gtk_style_provider_get_settings (GtkStyleProvider *provider) |
132 | { |
133 | GtkStyleProviderInterface *iface; |
134 | |
135 | gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), NULL); |
136 | |
137 | iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider); |
138 | |
139 | if (!iface->get_settings) |
140 | return NULL; |
141 | |
142 | return iface->get_settings (provider); |
143 | } |
144 | |
145 | int |
146 | gtk_style_provider_get_scale (GtkStyleProvider *provider) |
147 | { |
148 | GtkStyleProviderInterface *iface; |
149 | |
150 | gtk_internal_return_val_if_fail (GTK_IS_STYLE_PROVIDER (provider), 1); |
151 | |
152 | iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider); |
153 | |
154 | if (!iface->get_scale) |
155 | return 1; |
156 | |
157 | return iface->get_scale (provider); |
158 | } |
159 | |
160 | void |
161 | gtk_style_provider_emit_error (GtkStyleProvider *provider, |
162 | GtkCssSection *section, |
163 | GError *error) |
164 | { |
165 | GtkStyleProviderInterface *iface; |
166 | |
167 | iface = GTK_STYLE_PROVIDER_GET_INTERFACE (provider); |
168 | |
169 | if (iface->emit_error) |
170 | iface->emit_error (provider, section, error); |
171 | } |
172 | |