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 <gtk/css/gtkcss.h> |
23 | #include "gtk/css/gtkcsstokenizerprivate.h" |
24 | #include "gtk/css/gtkcssparserprivate.h" |
25 | #include "gtkcssnumbervalueprivate.h" |
26 | #include "gtkcssfontvariationsvalueprivate.h" |
27 | |
28 | struct _GtkCssValue { |
29 | GTK_CSS_VALUE_BASE |
30 | GHashTable *axes; |
31 | }; |
32 | |
33 | static GtkCssValue *default_font_variations; |
34 | |
35 | static GtkCssValue *gtk_css_font_variations_value_new_empty (void); |
36 | |
37 | static void |
38 | gtk_css_font_variations_value_add_axis (GtkCssValue *value, |
39 | const char *name, |
40 | GtkCssValue *coord) |
41 | { |
42 | g_hash_table_insert (hash_table: value->axes, key: g_strdup (str: name), value: coord); |
43 | } |
44 | |
45 | |
46 | static void |
47 | gtk_css_value_font_variations_free (GtkCssValue *value) |
48 | { |
49 | g_hash_table_unref (hash_table: value->axes); |
50 | |
51 | g_slice_free (GtkCssValue, value); |
52 | } |
53 | |
54 | static GtkCssValue * |
55 | gtk_css_value_font_variations_compute (GtkCssValue *specified, |
56 | guint property_id, |
57 | GtkStyleProvider *provider, |
58 | GtkCssStyle *style, |
59 | GtkCssStyle *parent_style) |
60 | { |
61 | return _gtk_css_value_ref (value: specified); |
62 | } |
63 | |
64 | static gboolean |
65 | gtk_css_value_font_variations_equal (const GtkCssValue *value1, |
66 | const GtkCssValue *value2) |
67 | { |
68 | gpointer name, coord1, coord2; |
69 | GHashTableIter iter; |
70 | |
71 | if (g_hash_table_size (hash_table: value1->axes) != g_hash_table_size (hash_table: value2->axes)) |
72 | return FALSE; |
73 | |
74 | g_hash_table_iter_init (iter: &iter, hash_table: value1->axes); |
75 | while (g_hash_table_iter_next (iter: &iter, key: &name, value: &coord1)) |
76 | { |
77 | coord2 = g_hash_table_lookup (hash_table: value2->axes, key: name); |
78 | if (coord2 == NULL) |
79 | return FALSE; |
80 | |
81 | if (!_gtk_css_value_equal (value1: coord1, value2: coord2)) |
82 | return FALSE; |
83 | } |
84 | |
85 | return TRUE; |
86 | } |
87 | |
88 | static GtkCssValue * |
89 | gtk_css_value_font_variations_transition (GtkCssValue *start, |
90 | GtkCssValue *end, |
91 | guint property_id, |
92 | double progress) |
93 | { |
94 | const char *name; |
95 | GtkCssValue *start_coord, *end_coord; |
96 | GHashTableIter iter; |
97 | GtkCssValue *result, *transition; |
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_variations_value_new_empty (); |
105 | |
106 | g_hash_table_iter_init (iter: &iter, hash_table: start->axes); |
107 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&start_coord)) |
108 | { |
109 | end_coord = g_hash_table_lookup (hash_table: end->axes, key: name); |
110 | if (end_coord == NULL) |
111 | transition = _gtk_css_value_ref (value: start_coord); |
112 | else |
113 | transition = _gtk_css_value_transition (start: start_coord, end: end_coord, property_id, progress); |
114 | |
115 | gtk_css_font_variations_value_add_axis (value: result, name, coord: transition); |
116 | } |
117 | |
118 | g_hash_table_iter_init (iter: &iter, hash_table: end->axes); |
119 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&end_coord)) |
120 | { |
121 | start_coord = g_hash_table_lookup (hash_table: start->axes, key: name); |
122 | if (start_coord != NULL) |
123 | continue; |
124 | |
125 | gtk_css_font_variations_value_add_axis (value: result, name, _gtk_css_value_ref (value: end_coord)); |
126 | } |
127 | |
128 | return result; |
129 | } |
130 | |
131 | static void |
132 | gtk_css_value_font_variations_print (const GtkCssValue *value, |
133 | GString *string) |
134 | { |
135 | GHashTableIter iter; |
136 | const char *name; |
137 | GtkCssValue *coord; |
138 | gboolean first = TRUE; |
139 | |
140 | if (value == default_font_variations) |
141 | { |
142 | g_string_append (string, val: "normal" ); |
143 | return; |
144 | } |
145 | |
146 | g_hash_table_iter_init (iter: &iter, hash_table: value->axes); |
147 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&coord)) |
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 | _gtk_css_value_print (value: coord, string); |
155 | } |
156 | } |
157 | |
158 | static const GtkCssValueClass GTK_CSS_VALUE_FONT_VARIATIONS = { |
159 | "GtkCssFontVariationsValue" , |
160 | gtk_css_value_font_variations_free, |
161 | gtk_css_value_font_variations_compute, |
162 | gtk_css_value_font_variations_equal, |
163 | gtk_css_value_font_variations_transition, |
164 | NULL, |
165 | NULL, |
166 | gtk_css_value_font_variations_print |
167 | }; |
168 | |
169 | static GtkCssValue * |
170 | gtk_css_font_variations_value_new_empty (void) |
171 | { |
172 | GtkCssValue *result; |
173 | |
174 | result = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_FONT_VARIATIONS); |
175 | result->axes = g_hash_table_new_full (hash_func: g_str_hash, key_equal_func: g_str_equal, |
176 | key_destroy_func: g_free, |
177 | value_destroy_func: (GDestroyNotify) _gtk_css_value_unref); |
178 | result->is_computed = TRUE; |
179 | |
180 | return result; |
181 | } |
182 | |
183 | GtkCssValue * |
184 | gtk_css_font_variations_value_new_default (void) |
185 | { |
186 | if (default_font_variations == NULL) |
187 | default_font_variations = gtk_css_font_variations_value_new_empty (); |
188 | |
189 | return _gtk_css_value_ref (value: default_font_variations); |
190 | } |
191 | |
192 | static gboolean |
193 | is_valid_opentype_tag (const char *s) |
194 | { |
195 | if (strlen (s: s) != 4) |
196 | return FALSE; |
197 | |
198 | if (s[0] < 0x20 || s[0] > 0x7e || |
199 | s[1] < 0x20 || s[1] > 0x7e || |
200 | s[2] < 0x20 || s[2] > 0x7e || |
201 | s[3] < 0x20 || s[3] > 0x7e) |
202 | return FALSE; |
203 | |
204 | return TRUE; |
205 | } |
206 | |
207 | GtkCssValue * |
208 | gtk_css_font_variations_value_parse (GtkCssParser *parser) |
209 | { |
210 | GtkCssValue *result, *coord; |
211 | char *name; |
212 | |
213 | if (gtk_css_parser_try_ident (self: parser, ident: "normal" )) |
214 | return gtk_css_font_variations_value_new_default (); |
215 | |
216 | result = gtk_css_font_variations_value_new_empty (); |
217 | |
218 | do { |
219 | name = gtk_css_parser_consume_string (self: parser); |
220 | if (name == NULL) |
221 | { |
222 | _gtk_css_value_unref (value: result); |
223 | return NULL; |
224 | } |
225 | |
226 | if (!is_valid_opentype_tag (s: name)) |
227 | { |
228 | gtk_css_parser_error_value (self: parser, format: "Not a valid OpenType tag." ); |
229 | g_free (mem: name); |
230 | _gtk_css_value_unref (value: result); |
231 | return NULL; |
232 | } |
233 | |
234 | coord = _gtk_css_number_value_parse (parser, flags: GTK_CSS_PARSE_NUMBER); |
235 | if (coord == NULL) |
236 | { |
237 | g_free (mem: name); |
238 | _gtk_css_value_unref (value: result); |
239 | return NULL; |
240 | } |
241 | |
242 | gtk_css_font_variations_value_add_axis (value: result, name, coord); |
243 | g_free (mem: name); |
244 | } while (gtk_css_parser_try_token (self: parser, token_type: GTK_CSS_TOKEN_COMMA)); |
245 | |
246 | return result; |
247 | } |
248 | |
249 | char * |
250 | gtk_css_font_variations_value_get_variations (GtkCssValue *value) |
251 | { |
252 | GtkCssValue *coord; |
253 | GHashTableIter iter; |
254 | gboolean first = TRUE; |
255 | const char *name; |
256 | GString *string; |
257 | |
258 | g_return_val_if_fail (value->class == >K_CSS_VALUE_FONT_VARIATIONS, NULL); |
259 | |
260 | if (value == default_font_variations) |
261 | return NULL; |
262 | |
263 | string = g_string_new (init: "" ); |
264 | |
265 | g_hash_table_iter_init (iter: &iter, hash_table: value->axes); |
266 | while (g_hash_table_iter_next (iter: &iter, key: (gpointer *)&name, value: (gpointer *)&coord)) |
267 | { |
268 | if (first) |
269 | first = FALSE; |
270 | else |
271 | g_string_append (string, val: "," ); |
272 | g_string_append_printf (string, format: "%s=%g" , name, |
273 | _gtk_css_number_value_get (number: coord, one_hundred_percent: 100)); |
274 | } |
275 | |
276 | return g_string_free (string, FALSE); |
277 | } |
278 | |