1 | /* GTK - The GIMP Toolkit |
2 | * Copyright (C) 2017 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 | * Author: Matthias Clasen |
18 | */ |
19 | |
20 | #include "config.h" |
21 | |
22 | #include "gtkcsstypesprivate.h" |
23 | #include <gtk/css/gtkcss.h> |
24 | #include "gtk/css/gtkcsstokenizerprivate.h" |
25 | #include "gtk/css/gtkcssparserprivate.h" |
26 | #include "gtkcssnumbervalueprivate.h" |
27 | #include "gtkcssfontfeaturesvalueprivate.h" |
28 | |
29 | struct _GtkCssValue { |
30 | GTK_CSS_VALUE_BASE |
31 | GHashTable *features; |
32 | }; |
33 | |
34 | static GtkCssValue *default_font_features; |
35 | |
36 | static GtkCssValue *gtk_css_font_features_value_new_empty (void); |
37 | |
38 | static void |
39 | gtk_css_font_features_value_add_feature (GtkCssValue *value, |
40 | const char *name, |
41 | int num) |
42 | { |
43 | g_hash_table_insert (hash_table: value->features, key: g_strdup (str: name), GINT_TO_POINTER (num)); |
44 | } |
45 | |
46 | |
47 | static void |
48 | gtk_css_value_font_features_free (GtkCssValue *value) |
49 | { |
50 | g_hash_table_unref (hash_table: value->features); |
51 | |
52 | g_slice_free (GtkCssValue, value); |
53 | } |
54 | |
55 | static GtkCssValue * |
56 | gtk_css_value_font_features_compute (GtkCssValue *specified, |
57 | guint property_id, |
58 | GtkStyleProvider *provider, |
59 | GtkCssStyle *style, |
60 | GtkCssStyle *parent_style) |
61 | { |
62 | return _gtk_css_value_ref (value: specified); |
63 | } |
64 | |
65 | static gboolean |
66 | gtk_css_value_font_features_equal (const GtkCssValue *value1, |
67 | const GtkCssValue *value2) |
68 | { |
69 | gpointer name, val1, val2; |
70 | GHashTableIter iter; |
71 | |
72 | if (g_hash_table_size (hash_table: value1->features) != g_hash_table_size (hash_table: value2->features)) |
73 | return FALSE; |
74 | |
75 | g_hash_table_iter_init (iter: &iter, hash_table: value1->features); |
76 | while (g_hash_table_iter_next (iter: &iter, key: &name, value: &val1)) |
77 | { |
78 | val2 = g_hash_table_lookup (hash_table: value2->features, key: name); |
79 | |
80 | if (val1 != val2) |
81 | return FALSE; |
82 | } |
83 | |
84 | return TRUE; |
85 | } |
86 | |
87 | static GtkCssValue * |
88 | gtk_css_value_font_features_transition (GtkCssValue *start, |
89 | GtkCssValue *end, |
90 | guint property_id, |
91 | double progress) |
92 | { |
93 | const char *name; |
94 | gpointer start_val, end_val; |
95 | GHashTableIter iter; |
96 | gpointer transition; |
97 | GtkCssValue *result; |
98 | |
99 | /* XXX: For value that are only in start or end but not both, |
100 | * we don't transition but just keep the value. |
101 | * That causes an abrupt transition to the new value at the end. |
102 | */ |
103 | |
104 | result = gtk_css_font_features_value_new_empty (); |
105 | |
106 | g_hash_table_iter_init (iter: &iter, hash_table: start->features); |
107 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&start_val)) |
108 | { |
109 | end_val = g_hash_table_lookup (hash_table: end->features, key: name); |
110 | if (end_val == NULL) |
111 | transition = start_val; |
112 | else |
113 | transition = progress > 0.5 ? start_val : end_val; |
114 | |
115 | gtk_css_font_features_value_add_feature (value: result, name, GPOINTER_TO_INT (transition)); |
116 | } |
117 | |
118 | g_hash_table_iter_init (iter: &iter, hash_table: end->features); |
119 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&end_val)) |
120 | { |
121 | start_val = g_hash_table_lookup (hash_table: start->features, key: name); |
122 | if (start_val != NULL) |
123 | continue; |
124 | |
125 | gtk_css_font_features_value_add_feature (value: result, name, GPOINTER_TO_INT (end_val)); |
126 | } |
127 | |
128 | return result; |
129 | } |
130 | |
131 | static void |
132 | gtk_css_value_font_features_print (const GtkCssValue *value, |
133 | GString *string) |
134 | { |
135 | GHashTableIter iter; |
136 | const char *name; |
137 | gpointer val; |
138 | gboolean first = TRUE; |
139 | |
140 | if (value == default_font_features) |
141 | { |
142 | g_string_append (string, val: "normal" ); |
143 | return; |
144 | } |
145 | |
146 | g_hash_table_iter_init (iter: &iter, hash_table: value->features); |
147 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&val)) |
148 | { |
149 | if (first) |
150 | first = FALSE; |
151 | else |
152 | g_string_append (string, val: ", " ); |
153 | g_string_append_printf (string, format: "\"%s\" " , name); |
154 | g_string_append_printf (string, format: "%d" , GPOINTER_TO_INT (val)); |
155 | } |
156 | } |
157 | |
158 | static const GtkCssValueClass GTK_CSS_VALUE_FONT_FEATURES = { |
159 | "GtkCssFontFeaturesValue" , |
160 | gtk_css_value_font_features_free, |
161 | gtk_css_value_font_features_compute, |
162 | gtk_css_value_font_features_equal, |
163 | gtk_css_value_font_features_transition, |
164 | NULL, |
165 | NULL, |
166 | gtk_css_value_font_features_print |
167 | }; |
168 | |
169 | static GtkCssValue * |
170 | gtk_css_font_features_value_new_empty (void) |
171 | { |
172 | GtkCssValue *result; |
173 | |
174 | result = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_FONT_FEATURES); |
175 | result->features = g_hash_table_new_full (hash_func: g_str_hash, key_equal_func: g_str_equal, key_destroy_func: g_free, NULL); |
176 | result->is_computed = TRUE; |
177 | |
178 | return result; |
179 | } |
180 | |
181 | GtkCssValue * |
182 | gtk_css_font_features_value_new_default (void) |
183 | { |
184 | if (default_font_features == NULL) |
185 | default_font_features = gtk_css_font_features_value_new_empty (); |
186 | |
187 | return _gtk_css_value_ref (value: default_font_features); |
188 | } |
189 | |
190 | static gboolean |
191 | is_valid_opentype_tag (const char *s) |
192 | { |
193 | if (strlen (s: s) != 4) |
194 | return FALSE; |
195 | |
196 | if (s[0] < 0x20 || s[0] > 0x7e || |
197 | s[1] < 0x20 || s[1] > 0x7e || |
198 | s[2] < 0x20 || s[2] > 0x7e || |
199 | s[3] < 0x20 || s[3] > 0x7e) |
200 | return FALSE; |
201 | |
202 | return TRUE; |
203 | } |
204 | |
205 | GtkCssValue * |
206 | gtk_css_font_features_value_parse (GtkCssParser *parser) |
207 | { |
208 | GtkCssValue *result; |
209 | char *name; |
210 | int num; |
211 | |
212 | if (gtk_css_parser_try_ident (self: parser, ident: "normal" )) |
213 | return gtk_css_font_features_value_new_default (); |
214 | |
215 | result = gtk_css_font_features_value_new_empty (); |
216 | |
217 | do { |
218 | name = gtk_css_parser_consume_string (self: parser); |
219 | if (name == NULL) |
220 | { |
221 | _gtk_css_value_unref (value: result); |
222 | return NULL; |
223 | } |
224 | |
225 | if (!is_valid_opentype_tag (s: name)) |
226 | { |
227 | gtk_css_parser_error_value (self: parser, format: "Not a valid OpenType tag." ); |
228 | g_free (mem: name); |
229 | _gtk_css_value_unref (value: result); |
230 | return NULL; |
231 | } |
232 | |
233 | if (gtk_css_parser_try_ident (self: parser, ident: "on" )) |
234 | num = 1; |
235 | else if (gtk_css_parser_try_ident (self: parser, ident: "off" )) |
236 | num = 0; |
237 | else if (gtk_css_parser_has_integer (self: parser)) |
238 | { |
239 | if (!gtk_css_parser_consume_integer (self: parser, number: &num)) |
240 | { |
241 | g_free (mem: name); |
242 | _gtk_css_value_unref (value: result); |
243 | return NULL; |
244 | } |
245 | } |
246 | else |
247 | num = 1; |
248 | |
249 | gtk_css_font_features_value_add_feature (value: result, name, num); |
250 | g_free (mem: name); |
251 | } while (gtk_css_parser_try_token (self: parser, token_type: GTK_CSS_TOKEN_COMMA)); |
252 | |
253 | return result; |
254 | } |
255 | |
256 | char * |
257 | gtk_css_font_features_value_get_features (GtkCssValue *value) |
258 | { |
259 | GtkCssValue *val; |
260 | GHashTableIter iter; |
261 | gboolean first = TRUE; |
262 | const char *name; |
263 | GString *string; |
264 | |
265 | g_return_val_if_fail (value->class == >K_CSS_VALUE_FONT_FEATURES, NULL); |
266 | |
267 | if (value == default_font_features) |
268 | return NULL; |
269 | |
270 | string = g_string_new (init: "" ); |
271 | |
272 | g_hash_table_iter_init (iter: &iter, hash_table: value->features); |
273 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&val)) |
274 | { |
275 | if (first) |
276 | first = FALSE; |
277 | else |
278 | g_string_append (string, val: ", " ); |
279 | g_string_append_printf (string, format: "%s %d" , name, GPOINTER_TO_INT (val)); |
280 | } |
281 | |
282 | return g_string_free (string, FALSE); |
283 | } |
284 | |