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 "gtkcssarrayvalueprivate.h" |
21 | #include "gtkcssimagevalueprivate.h" |
22 | #include "gtkcssstylepropertyprivate.h" |
23 | |
24 | #include <string.h> |
25 | |
26 | struct _GtkCssValue { |
27 | GTK_CSS_VALUE_BASE |
28 | guint n_values; |
29 | GtkCssValue *values[1]; |
30 | }; |
31 | |
32 | static void |
33 | gtk_css_value_array_free (GtkCssValue *value) |
34 | { |
35 | guint i; |
36 | |
37 | for (i = 0; i < value->n_values; i++) |
38 | { |
39 | _gtk_css_value_unref (value: value->values[i]); |
40 | } |
41 | |
42 | g_slice_free1 (block_size: sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (value->n_values - 1), mem_block: value); |
43 | } |
44 | |
45 | static GtkCssValue * |
46 | gtk_css_value_array_compute (GtkCssValue *value, |
47 | guint property_id, |
48 | GtkStyleProvider *provider, |
49 | GtkCssStyle *style, |
50 | GtkCssStyle *parent_style) |
51 | { |
52 | GtkCssValue *result; |
53 | GtkCssValue *i_value; |
54 | guint i, j; |
55 | |
56 | result = NULL; |
57 | for (i = 0; i < value->n_values; i++) |
58 | { |
59 | i_value = _gtk_css_value_compute (value: value->values[i], property_id, provider, style, parent_style); |
60 | |
61 | if (result == NULL && |
62 | i_value != value->values[i]) |
63 | { |
64 | result = _gtk_css_array_value_new_from_array (values: value->values, n_values: value->n_values); |
65 | for (j = 0; j < i; j++) |
66 | _gtk_css_value_ref (value: result->values[j]); |
67 | } |
68 | |
69 | if (result != NULL) |
70 | result->values[i] = i_value; |
71 | else |
72 | _gtk_css_value_unref (value: i_value); |
73 | } |
74 | |
75 | if (result == NULL) |
76 | return _gtk_css_value_ref (value); |
77 | |
78 | return result; |
79 | } |
80 | |
81 | static gboolean |
82 | gtk_css_value_array_equal (const GtkCssValue *value1, |
83 | const GtkCssValue *value2) |
84 | { |
85 | guint i; |
86 | |
87 | if (value1->n_values != value2->n_values) |
88 | return FALSE; |
89 | |
90 | for (i = 0; i < value1->n_values; i++) |
91 | { |
92 | if (!_gtk_css_value_equal (value1: value1->values[i], |
93 | value2: value2->values[i])) |
94 | return FALSE; |
95 | } |
96 | |
97 | return TRUE; |
98 | } |
99 | |
100 | static guint |
101 | gcd (guint a, guint b) |
102 | { |
103 | while (b != 0) |
104 | { |
105 | guint t = b; |
106 | b = a % b; |
107 | a = t; |
108 | } |
109 | return a; |
110 | } |
111 | |
112 | static guint |
113 | lcm (guint a, guint b) |
114 | { |
115 | return a / gcd (a, b) * b; |
116 | } |
117 | |
118 | static GtkCssValue * |
119 | gtk_css_value_array_transition_repeat (GtkCssValue *start, |
120 | GtkCssValue *end, |
121 | guint property_id, |
122 | double progress) |
123 | { |
124 | GtkCssValue **transitions; |
125 | guint i, n; |
126 | |
127 | n = lcm (a: start->n_values, b: end->n_values); |
128 | transitions = g_newa (GtkCssValue *, n); |
129 | |
130 | for (i = 0; i < n; i++) |
131 | { |
132 | transitions[i] = _gtk_css_value_transition (start: start->values[i % start->n_values], |
133 | end: end->values[i % end->n_values], |
134 | property_id, |
135 | progress); |
136 | if (transitions[i] == NULL) |
137 | { |
138 | while (i--) |
139 | _gtk_css_value_unref (value: transitions[i]); |
140 | return NULL; |
141 | } |
142 | } |
143 | |
144 | return _gtk_css_array_value_new_from_array (values: transitions, n_values: n); |
145 | } |
146 | |
147 | static GtkCssValue * |
148 | gtk_css_array_value_create_default_transition_value (guint property_id) |
149 | { |
150 | switch (property_id) |
151 | { |
152 | case GTK_CSS_PROPERTY_BACKGROUND_IMAGE: |
153 | return _gtk_css_image_value_new (NULL); |
154 | default: |
155 | g_return_val_if_reached (NULL); |
156 | } |
157 | } |
158 | |
159 | static GtkCssValue * |
160 | gtk_css_value_array_transition_extend (GtkCssValue *start, |
161 | GtkCssValue *end, |
162 | guint property_id, |
163 | double progress) |
164 | { |
165 | GtkCssValue **transitions; |
166 | guint i, n; |
167 | |
168 | n = MAX (start->n_values, end->n_values); |
169 | transitions = g_newa (GtkCssValue *, n); |
170 | |
171 | for (i = 0; i < MIN (start->n_values, end->n_values); i++) |
172 | { |
173 | transitions[i] = _gtk_css_value_transition (start: start->values[i], |
174 | end: end->values[i], |
175 | property_id, |
176 | progress); |
177 | if (transitions[i] == NULL) |
178 | { |
179 | while (i--) |
180 | _gtk_css_value_unref (value: transitions[i]); |
181 | return NULL; |
182 | } |
183 | } |
184 | |
185 | if (start->n_values != end->n_values) |
186 | { |
187 | GtkCssValue *default_value; |
188 | |
189 | default_value = gtk_css_array_value_create_default_transition_value (property_id); |
190 | |
191 | for (; i < start->n_values; i++) |
192 | { |
193 | transitions[i] = _gtk_css_value_transition (start: start->values[i], |
194 | end: default_value, |
195 | property_id, |
196 | progress); |
197 | if (transitions[i] == NULL) |
198 | { |
199 | while (i--) |
200 | _gtk_css_value_unref (value: transitions[i]); |
201 | return NULL; |
202 | } |
203 | } |
204 | |
205 | for (; i < end->n_values; i++) |
206 | { |
207 | transitions[i] = _gtk_css_value_transition (start: default_value, |
208 | end: end->values[i], |
209 | property_id, |
210 | progress); |
211 | if (transitions[i] == NULL) |
212 | { |
213 | while (i--) |
214 | _gtk_css_value_unref (value: transitions[i]); |
215 | return NULL; |
216 | } |
217 | } |
218 | |
219 | } |
220 | |
221 | g_assert (i == n); |
222 | |
223 | return _gtk_css_array_value_new_from_array (values: transitions, n_values: n); |
224 | } |
225 | |
226 | static GtkCssValue * |
227 | gtk_css_value_array_transition (GtkCssValue *start, |
228 | GtkCssValue *end, |
229 | guint property_id, |
230 | double progress) |
231 | { |
232 | switch (property_id) |
233 | { |
234 | case GTK_CSS_PROPERTY_BACKGROUND_CLIP: |
235 | case GTK_CSS_PROPERTY_BACKGROUND_ORIGIN: |
236 | case GTK_CSS_PROPERTY_BACKGROUND_SIZE: |
237 | case GTK_CSS_PROPERTY_BACKGROUND_POSITION: |
238 | case GTK_CSS_PROPERTY_BACKGROUND_REPEAT: |
239 | return gtk_css_value_array_transition_repeat (start, end, property_id, progress); |
240 | case GTK_CSS_PROPERTY_BACKGROUND_IMAGE: |
241 | return gtk_css_value_array_transition_extend (start, end, property_id, progress); |
242 | case GTK_CSS_PROPERTY_COLOR: |
243 | case GTK_CSS_PROPERTY_FONT_SIZE: |
244 | case GTK_CSS_PROPERTY_BACKGROUND_COLOR: |
245 | case GTK_CSS_PROPERTY_FONT_FAMILY: |
246 | case GTK_CSS_PROPERTY_FONT_STYLE: |
247 | case GTK_CSS_PROPERTY_FONT_WEIGHT: |
248 | case GTK_CSS_PROPERTY_TEXT_SHADOW: |
249 | case GTK_CSS_PROPERTY_ICON_SHADOW: |
250 | case GTK_CSS_PROPERTY_BOX_SHADOW: |
251 | case GTK_CSS_PROPERTY_MARGIN_TOP: |
252 | case GTK_CSS_PROPERTY_MARGIN_LEFT: |
253 | case GTK_CSS_PROPERTY_MARGIN_BOTTOM: |
254 | case GTK_CSS_PROPERTY_MARGIN_RIGHT: |
255 | case GTK_CSS_PROPERTY_PADDING_TOP: |
256 | case GTK_CSS_PROPERTY_PADDING_LEFT: |
257 | case GTK_CSS_PROPERTY_PADDING_BOTTOM: |
258 | case GTK_CSS_PROPERTY_PADDING_RIGHT: |
259 | case GTK_CSS_PROPERTY_BORDER_TOP_STYLE: |
260 | case GTK_CSS_PROPERTY_BORDER_TOP_WIDTH: |
261 | case GTK_CSS_PROPERTY_BORDER_LEFT_STYLE: |
262 | case GTK_CSS_PROPERTY_BORDER_LEFT_WIDTH: |
263 | case GTK_CSS_PROPERTY_BORDER_BOTTOM_STYLE: |
264 | case GTK_CSS_PROPERTY_BORDER_BOTTOM_WIDTH: |
265 | case GTK_CSS_PROPERTY_BORDER_RIGHT_STYLE: |
266 | case GTK_CSS_PROPERTY_BORDER_RIGHT_WIDTH: |
267 | case GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS: |
268 | case GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS: |
269 | case GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS: |
270 | case GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS: |
271 | case GTK_CSS_PROPERTY_OUTLINE_STYLE: |
272 | case GTK_CSS_PROPERTY_OUTLINE_WIDTH: |
273 | case GTK_CSS_PROPERTY_OUTLINE_OFFSET: |
274 | case GTK_CSS_PROPERTY_BORDER_TOP_COLOR: |
275 | case GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR: |
276 | case GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR: |
277 | case GTK_CSS_PROPERTY_BORDER_LEFT_COLOR: |
278 | case GTK_CSS_PROPERTY_OUTLINE_COLOR: |
279 | case GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE: |
280 | case GTK_CSS_PROPERTY_BORDER_IMAGE_REPEAT: |
281 | case GTK_CSS_PROPERTY_BORDER_IMAGE_SLICE: |
282 | case GTK_CSS_PROPERTY_BORDER_IMAGE_WIDTH: |
283 | default: |
284 | /* keep all values that are not arrays here, so we get a warning if we ever turn them |
285 | * into arrays and start animating them. */ |
286 | g_warning ("Don't know how to transition arrays for property '%s'" , |
287 | _gtk_style_property_get_name (GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (property_id)))); |
288 | return NULL; |
289 | case GTK_CSS_PROPERTY_TRANSITION_PROPERTY: |
290 | case GTK_CSS_PROPERTY_TRANSITION_DURATION: |
291 | case GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION: |
292 | case GTK_CSS_PROPERTY_TRANSITION_DELAY: |
293 | return NULL; |
294 | } |
295 | } |
296 | |
297 | static gboolean |
298 | gtk_css_value_array_is_dynamic (const GtkCssValue *value) |
299 | { |
300 | guint i; |
301 | |
302 | for (i = 0; i < value->n_values; i++) |
303 | { |
304 | if (gtk_css_value_is_dynamic (value: value->values[i])) |
305 | return TRUE; |
306 | } |
307 | |
308 | return FALSE; |
309 | } |
310 | |
311 | static GtkCssValue * |
312 | gtk_css_value_array_get_dynamic_value (GtkCssValue *value, |
313 | gint64 monotonic_time) |
314 | { |
315 | GtkCssValue *result; |
316 | GtkCssValue *i_value; |
317 | guint i, j; |
318 | |
319 | if (!gtk_css_value_is_dynamic (value)) |
320 | return gtk_css_value_ref (value); |
321 | |
322 | result = NULL; |
323 | for (i = 0; i < value->n_values; i++) |
324 | { |
325 | i_value = gtk_css_value_get_dynamic_value (value: value->values[i], monotonic_time); |
326 | |
327 | if (result == NULL && |
328 | i_value != value->values[i]) |
329 | { |
330 | result = _gtk_css_array_value_new_from_array (values: value->values, n_values: value->n_values); |
331 | for (j = 0; j < i; j++) |
332 | _gtk_css_value_ref (value: result->values[j]); |
333 | } |
334 | |
335 | if (result != NULL) |
336 | result->values[i] = i_value; |
337 | else |
338 | _gtk_css_value_unref (value: i_value); |
339 | } |
340 | |
341 | if (result == NULL) |
342 | return _gtk_css_value_ref (value); |
343 | |
344 | return result; |
345 | } |
346 | |
347 | static void |
348 | gtk_css_value_array_print (const GtkCssValue *value, |
349 | GString *string) |
350 | { |
351 | guint i; |
352 | |
353 | if (value->n_values == 0) |
354 | { |
355 | g_string_append (string, val: "none" ); |
356 | return; |
357 | } |
358 | |
359 | for (i = 0; i < value->n_values; i++) |
360 | { |
361 | if (i > 0) |
362 | g_string_append (string, val: ", " ); |
363 | _gtk_css_value_print (value: value->values[i], string); |
364 | } |
365 | } |
366 | |
367 | static const GtkCssValueClass GTK_CSS_VALUE_ARRAY = { |
368 | "GtkCssArrayValue" , |
369 | gtk_css_value_array_free, |
370 | gtk_css_value_array_compute, |
371 | gtk_css_value_array_equal, |
372 | gtk_css_value_array_transition, |
373 | gtk_css_value_array_is_dynamic, |
374 | gtk_css_value_array_get_dynamic_value, |
375 | gtk_css_value_array_print |
376 | }; |
377 | |
378 | GtkCssValue * |
379 | _gtk_css_array_value_new (GtkCssValue *content) |
380 | { |
381 | g_return_val_if_fail (content != NULL, NULL); |
382 | |
383 | return _gtk_css_array_value_new_from_array (values: &content, n_values: 1); |
384 | } |
385 | |
386 | GtkCssValue * |
387 | _gtk_css_array_value_new_from_array (GtkCssValue **values, |
388 | guint n_values) |
389 | { |
390 | GtkCssValue *result; |
391 | guint i; |
392 | |
393 | g_return_val_if_fail (values != NULL, NULL); |
394 | g_return_val_if_fail (n_values > 0, NULL); |
395 | |
396 | if (n_values == 1) |
397 | return values[0]; |
398 | |
399 | result = _gtk_css_value_alloc (klass: >K_CSS_VALUE_ARRAY, size: sizeof (GtkCssValue) + sizeof (GtkCssValue *) * (n_values - 1)); |
400 | result->n_values = n_values; |
401 | memcpy (dest: &result->values[0], src: values, n: sizeof (GtkCssValue *) * n_values); |
402 | |
403 | result->is_computed = TRUE; |
404 | for (i = 0; i < n_values; i ++) |
405 | { |
406 | if (!gtk_css_value_is_computed (value: values[i])) |
407 | { |
408 | result->is_computed = FALSE; |
409 | break; |
410 | } |
411 | } |
412 | |
413 | return result; |
414 | } |
415 | |
416 | GtkCssValue * |
417 | _gtk_css_array_value_parse (GtkCssParser *parser, |
418 | GtkCssValue *(* parse_func) (GtkCssParser *parser)) |
419 | { |
420 | GtkCssValue *value, *result; |
421 | GtkCssValue *values[128]; |
422 | guint n_values = 0; |
423 | guint i; |
424 | |
425 | do { |
426 | value = parse_func (parser); |
427 | |
428 | if (value == NULL) |
429 | { |
430 | for (i = 0; i < n_values; i ++) |
431 | _gtk_css_value_unref (value: values[i]); |
432 | |
433 | return NULL; |
434 | } |
435 | |
436 | values[n_values] = value; |
437 | n_values ++; |
438 | if (G_UNLIKELY (n_values > G_N_ELEMENTS (values))) |
439 | g_error ("Only %d elements in a css array are allowed" , (int)G_N_ELEMENTS (values)); |
440 | } while (gtk_css_parser_try_token (self: parser, token_type: GTK_CSS_TOKEN_COMMA)); |
441 | |
442 | result = _gtk_css_array_value_new_from_array (values, n_values); |
443 | return result; |
444 | } |
445 | |
446 | GtkCssValue * |
447 | _gtk_css_array_value_get_nth (GtkCssValue *value, |
448 | guint i) |
449 | { |
450 | if (value->class != >K_CSS_VALUE_ARRAY) |
451 | return value; |
452 | |
453 | g_return_val_if_fail (value != NULL, NULL); |
454 | g_return_val_if_fail (value->class == >K_CSS_VALUE_ARRAY, NULL); |
455 | g_return_val_if_fail (value->n_values > 0, NULL); |
456 | |
457 | return value->values[i % value->n_values]; |
458 | } |
459 | |
460 | guint |
461 | _gtk_css_array_value_get_n_values (const GtkCssValue *value) |
462 | { |
463 | if (value->class != >K_CSS_VALUE_ARRAY) |
464 | return 1; |
465 | |
466 | g_return_val_if_fail (value != NULL, 0); |
467 | g_return_val_if_fail (value->class == >K_CSS_VALUE_ARRAY, 0); |
468 | |
469 | return value->n_values; |
470 | } |
471 | |
472 | |