1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
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.
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.
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/>.
20 #include "gtkcsscolorvalueprivate.h"
22 #include "gtkcssrgbavalueprivate.h"
23 #include "gtkcssstylepropertyprivate.h"
24 #include "gtkhslaprivate.h"
25 #include "gtkstylepropertyprivate.h"
26 #include "gtkstyleproperties.h"
27 #include "gtkwin32themeprivate.h"
36 COLOR_TYPE_CURRENT_COLOR
43 GtkCssValue *last_value;
71 gtk_css_value_color_free (GtkCssValue *color)
73 if (color->last_value)
74 _gtk_css_value_unref (color->last_value);
79 g_free (color->sym_col.name);
81 case COLOR_TYPE_SHADE:
82 _gtk_css_value_unref (color->sym_col.shade.color);
84 case COLOR_TYPE_ALPHA:
85 _gtk_css_value_unref (color->sym_col.alpha.color);
88 _gtk_css_value_unref (color->sym_col.mix.color1);
89 _gtk_css_value_unref (color->sym_col.mix.color2);
91 case COLOR_TYPE_WIN32:
92 g_free (color->sym_col.win32.theme_class);
98 g_slice_free (GtkCssValue, color);
102 gtk_css_value_color_get_fallback (guint property_id,
103 GtkStyleProviderPrivate *provider,
104 GtkCssComputedValues *values,
105 GtkCssComputedValues *parent_values)
107 static const GdkRGBA transparent = { 0, 0, 0, 0 };
111 case GTK_CSS_PROPERTY_BACKGROUND_IMAGE:
112 case GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE:
113 case GTK_CSS_PROPERTY_TEXT_SHADOW:
114 case GTK_CSS_PROPERTY_ICON_SHADOW:
115 case GTK_CSS_PROPERTY_BOX_SHADOW:
116 return _gtk_css_rgba_value_new_from_rgba (&transparent);
117 case GTK_CSS_PROPERTY_COLOR:
118 case GTK_CSS_PROPERTY_BACKGROUND_COLOR:
119 case GTK_CSS_PROPERTY_BORDER_TOP_COLOR:
120 case GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR:
121 case GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR:
122 case GTK_CSS_PROPERTY_BORDER_LEFT_COLOR:
123 case GTK_CSS_PROPERTY_OUTLINE_COLOR:
124 return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
131 if (property_id < GTK_CSS_PROPERTY_N_PROPERTIES)
132 g_warning ("No fallback color defined for property '%s'",
133 _gtk_style_property_get_name (GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (property_id))));
134 return _gtk_css_rgba_value_new_from_rgba (&transparent);
139 _gtk_css_color_value_resolve (GtkCssValue *color,
140 GtkStyleProviderPrivate *provider,
141 GtkCssValue *current,
142 GtkCssDependencies current_deps,
143 GtkCssDependencies *dependencies)
145 GtkCssDependencies unused;
148 g_return_val_if_fail (color != NULL, NULL);
149 g_return_val_if_fail (provider == NULL || GTK_IS_STYLE_PROVIDER_PRIVATE (provider), NULL);
150 g_return_val_if_fail (current != NULL, NULL);
152 if (dependencies == NULL)
153 dependencies = &unused;
158 case COLOR_TYPE_LITERAL:
159 return _gtk_css_value_ref (color->last_value);
160 case COLOR_TYPE_NAME:
164 named = _gtk_style_provider_private_get_color (provider, color->sym_col.name);
168 value = _gtk_css_color_value_resolve (named, provider, current, current_deps, dependencies);
172 case COLOR_TYPE_SHADE:
178 val = _gtk_css_color_value_resolve (color->sym_col.shade.color, provider, current, current_deps, dependencies);
182 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
184 _gtk_hsla_init_from_rgba (&hsla, _gtk_css_rgba_value_get_rgba (val));
185 _gtk_hsla_shade (&hsla, &hsla, color->sym_col.shade.factor);
187 _gdk_rgba_init_from_hsla (&shade, &hsla);
189 _gtk_css_value_unref (val);
191 value = _gtk_css_rgba_value_new_from_rgba (&shade);
195 case COLOR_TYPE_ALPHA:
200 val = _gtk_css_color_value_resolve (color->sym_col.alpha.color, provider, current, current_deps, dependencies);
204 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
205 alpha = *_gtk_css_rgba_value_get_rgba (val);
206 alpha.alpha = CLAMP (alpha.alpha * color->sym_col.alpha.factor, 0, 1);
208 _gtk_css_value_unref (val);
210 value = _gtk_css_rgba_value_new_from_rgba (&alpha);
217 GdkRGBA color1, color2, res;
218 GtkCssDependencies dep1, dep2;
220 val = _gtk_css_color_value_resolve (color->sym_col.mix.color1, provider, current, current_deps, &dep1);
223 color1 = *_gtk_css_rgba_value_get_rgba (val);
224 _gtk_css_value_unref (val);
226 val = _gtk_css_color_value_resolve (color->sym_col.mix.color2, provider, current, current_deps, &dep2);
229 color2 = *_gtk_css_rgba_value_get_rgba (val);
230 _gtk_css_value_unref (val);
232 *dependencies = _gtk_css_dependencies_union (dep1, dep2);
233 res.red = CLAMP (color1.red + ((color2.red - color1.red) * color->sym_col.mix.factor), 0, 1);
234 res.green = CLAMP (color1.green + ((color2.green - color1.green) * color->sym_col.mix.factor), 0, 1);
235 res.blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->sym_col.mix.factor), 0, 1);
236 res.alpha = CLAMP (color1.alpha + ((color2.alpha - color1.alpha) * color->sym_col.mix.factor), 0, 1);
238 value =_gtk_css_rgba_value_new_from_rgba (&res);
242 case COLOR_TYPE_WIN32:
246 if (!_gtk_win32_theme_color_resolve (color->sym_col.win32.theme_class,
247 color->sym_col.win32.id,
251 value = _gtk_css_rgba_value_new_from_rgba (&res);
255 case COLOR_TYPE_CURRENT_COLOR:
258 *dependencies = current_deps;
259 return _gtk_css_value_ref (current);
268 g_assert_not_reached ();
271 if (color->last_value != NULL &&
272 _gtk_css_value_equal (color->last_value, value))
274 _gtk_css_value_unref (value);
275 value = _gtk_css_value_ref (color->last_value);
279 if (color->last_value != NULL)
280 _gtk_css_value_unref (color->last_value);
281 color->last_value = _gtk_css_value_ref (value);
288 gtk_css_value_color_compute (GtkCssValue *value,
290 GtkStyleProviderPrivate *provider,
291 GtkCssComputedValues *values,
292 GtkCssComputedValues *parent_values,
293 GtkCssDependencies *dependencies)
295 GtkCssValue *resolved, *current;
296 GtkCssDependencies current_deps;
298 /* The computed value of the ‘currentColor’ keyword is the computed
299 * value of the ‘color’ property. If the ‘currentColor’ keyword is
300 * set on the ‘color’ property itself, it is treated as ‘color: inherit’.
302 if (property_id == GTK_CSS_PROPERTY_COLOR)
306 current = _gtk_css_computed_values_get_value (parent_values, GTK_CSS_PROPERTY_COLOR);
307 current_deps = GTK_CSS_EQUALS_PARENT;
311 current = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
317 current = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_COLOR);
318 current_deps = GTK_CSS_DEPENDS_ON_COLOR;
321 resolved = _gtk_css_color_value_resolve (value,
327 if (resolved == NULL)
328 return gtk_css_value_color_get_fallback (property_id, provider, values, parent_values);
334 gtk_css_value_color_equal (const GtkCssValue *value1,
335 const GtkCssValue *value2)
337 if (value1->type != value2->type)
340 switch (value1->type)
342 case COLOR_TYPE_LITERAL:
343 return _gtk_css_value_equal (value1->last_value, value2->last_value);
344 case COLOR_TYPE_NAME:
345 return g_str_equal (value1->sym_col.name, value2->sym_col.name);
346 case COLOR_TYPE_SHADE:
347 return value1->sym_col.shade.factor == value2->sym_col.shade.factor &&
348 _gtk_css_value_equal (value1->sym_col.shade.color,
349 value2->sym_col.shade.color);
350 case COLOR_TYPE_ALPHA:
351 return value1->sym_col.alpha.factor == value2->sym_col.alpha.factor &&
352 _gtk_css_value_equal (value1->sym_col.alpha.color,
353 value2->sym_col.alpha.color);
355 return value1->sym_col.mix.factor == value2->sym_col.mix.factor &&
356 _gtk_css_value_equal (value1->sym_col.mix.color1,
357 value2->sym_col.mix.color1) &&
358 _gtk_css_value_equal (value1->sym_col.mix.color2,
359 value2->sym_col.mix.color2);
360 case COLOR_TYPE_WIN32:
361 return g_str_equal (value1->sym_col.win32.theme_class, value2->sym_col.win32.theme_class) &&
362 value1->sym_col.win32.id == value2->sym_col.win32.id;
363 case COLOR_TYPE_CURRENT_COLOR:
366 g_assert_not_reached ();
372 gtk_css_value_color_transition (GtkCssValue *start,
377 return _gtk_css_color_value_new_mix (start, end, progress);
381 gtk_css_value_color_print (const GtkCssValue *value,
386 case COLOR_TYPE_LITERAL:
387 _gtk_css_value_print (value->last_value, string);
389 case COLOR_TYPE_NAME:
390 g_string_append (string, "@");
391 g_string_append (string, value->sym_col.name);
393 case COLOR_TYPE_SHADE:
395 char factor[G_ASCII_DTOSTR_BUF_SIZE];
397 g_string_append (string, "shade(");
398 _gtk_css_value_print (value->sym_col.shade.color, string);
399 g_string_append (string, ", ");
400 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.shade.factor);
401 g_string_append (string, factor);
402 g_string_append (string, ")");
405 case COLOR_TYPE_ALPHA:
407 char factor[G_ASCII_DTOSTR_BUF_SIZE];
409 g_string_append (string, "alpha(");
410 _gtk_css_value_print (value->sym_col.alpha.color, string);
411 g_string_append (string, ", ");
412 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.alpha.factor);
413 g_string_append (string, factor);
414 g_string_append (string, ")");
419 char factor[G_ASCII_DTOSTR_BUF_SIZE];
421 g_string_append (string, "mix(");
422 _gtk_css_value_print (value->sym_col.mix.color1, string);
423 g_string_append (string, ", ");
424 _gtk_css_value_print (value->sym_col.mix.color2, string);
425 g_string_append (string, ", ");
426 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.mix.factor);
427 g_string_append (string, factor);
428 g_string_append (string, ")");
431 case COLOR_TYPE_WIN32:
433 g_string_append_printf (string, GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME"(%s, %d)",
434 value->sym_col.win32.theme_class, value->sym_col.win32.id);
437 case COLOR_TYPE_CURRENT_COLOR:
438 g_string_append (string, "currentColor");
441 g_assert_not_reached ();
445 static const GtkCssValueClass GTK_CSS_VALUE_COLOR = {
446 gtk_css_value_color_free,
447 gtk_css_value_color_compute,
448 gtk_css_value_color_equal,
449 gtk_css_value_color_transition,
450 gtk_css_value_color_print
454 _gtk_css_color_value_new_literal (const GdkRGBA *color)
458 g_return_val_if_fail (color != NULL, NULL);
460 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
461 value->type = COLOR_TYPE_LITERAL;
462 value->last_value = _gtk_css_rgba_value_new_from_rgba (color);
468 _gtk_css_color_value_new_rgba (double red,
473 GdkRGBA rgba = { red, green, blue, alpha };
475 return _gtk_css_color_value_new_literal (&rgba);
479 _gtk_css_color_value_new_name (const gchar *name)
483 g_return_val_if_fail (name != NULL, NULL);
485 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
486 value->type = COLOR_TYPE_NAME;
487 value->sym_col.name = g_strdup (name);
493 _gtk_css_color_value_new_shade (GtkCssValue *color,
498 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
500 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
501 value->type = COLOR_TYPE_SHADE;
502 value->sym_col.shade.color = _gtk_css_value_ref (color);
503 value->sym_col.shade.factor = factor;
509 _gtk_css_color_value_new_alpha (GtkCssValue *color,
514 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
516 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
517 value->type = COLOR_TYPE_ALPHA;
518 value->sym_col.alpha.color = _gtk_css_value_ref (color);
519 value->sym_col.alpha.factor = factor;
525 _gtk_css_color_value_new_mix (GtkCssValue *color1,
531 g_return_val_if_fail (color1->class == >K_CSS_VALUE_COLOR, NULL);
532 g_return_val_if_fail (color2->class == >K_CSS_VALUE_COLOR, NULL);
534 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
535 value->type = COLOR_TYPE_MIX;
536 value->sym_col.mix.color1 = _gtk_css_value_ref (color1);
537 value->sym_col.mix.color2 = _gtk_css_value_ref (color2);
538 value->sym_col.mix.factor = factor;
544 _gtk_css_color_value_new_win32 (const gchar *theme_class,
549 g_return_val_if_fail (theme_class != NULL, NULL);
551 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
552 value->type = COLOR_TYPE_WIN32;
553 value->sym_col.win32.theme_class = g_strdup (theme_class);
554 value->sym_col.win32.id = id;
560 _gtk_css_color_value_new_current_color (void)
562 static GtkCssValue current_color = { >K_CSS_VALUE_COLOR, 1, COLOR_TYPE_CURRENT_COLOR, NULL, };
564 return _gtk_css_value_ref (¤t_color);
579 gtk_css_color_parse_win32 (GtkCssParser *parser)
585 class = _gtk_css_parser_try_name (parser, TRUE);
588 _gtk_css_parser_error (parser,
589 "Expected name as first argument to '-gtk-win32-color'");
593 if (! _gtk_css_parser_try (parser, ",", TRUE))
596 _gtk_css_parser_error (parser,
601 if (!_gtk_css_parser_try_int (parser, &id))
604 _gtk_css_parser_error (parser, "Expected a valid integer value");
608 color = _gtk_css_color_value_new_win32 (class, id);
614 _gtk_css_color_value_parse_function (GtkCssParser *parser,
615 ColorParseType color)
618 GtkCssValue *child1, *child2;
621 if (!_gtk_css_parser_try (parser, "(", TRUE))
623 _gtk_css_parser_error (parser, "Missing opening bracket in color definition");
627 if (color == COLOR_RGB || color == COLOR_RGBA)
633 for (i = 0; i < 3; i++)
635 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
637 _gtk_css_parser_error (parser, "Expected ',' in color definition");
641 if (!_gtk_css_parser_try_double (parser, &tmp))
643 _gtk_css_parser_error (parser, "Invalid number for color value");
646 if (_gtk_css_parser_try (parser, "%", TRUE))
657 g_assert_not_reached ();
660 if (color == COLOR_RGBA)
662 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
664 _gtk_css_parser_error (parser, "Expected ',' in color definition");
668 if (!_gtk_css_parser_try_double (parser, &rgba.alpha))
670 _gtk_css_parser_error (parser, "Invalid number for alpha value");
677 value = _gtk_css_color_value_new_literal (&rgba);
679 else if (color == COLOR_WIN32)
681 value = gtk_css_color_parse_win32 (parser);
687 child1 = _gtk_css_color_value_parse (parser);
691 if (color == COLOR_MIX)
693 if (!_gtk_css_parser_try (parser, ",", TRUE))
695 _gtk_css_parser_error (parser, "Expected ',' in color definition");
696 _gtk_css_value_unref (child1);
700 child2 = _gtk_css_color_value_parse (parser);
703 _gtk_css_value_unref (child1);
710 if (color == COLOR_LIGHTER)
712 else if (color == COLOR_DARKER)
716 if (!_gtk_css_parser_try (parser, ",", TRUE))
718 _gtk_css_parser_error (parser, "Expected ',' in color definition");
719 _gtk_css_value_unref (child1);
721 _gtk_css_value_unref (child2);
725 if (!_gtk_css_parser_try_double (parser, &d))
727 _gtk_css_parser_error (parser, "Expected number in color definition");
728 _gtk_css_value_unref (child1);
730 _gtk_css_value_unref (child2);
740 value = _gtk_css_color_value_new_shade (child1, d);
743 value = _gtk_css_color_value_new_alpha (child1, d);
746 value = _gtk_css_color_value_new_mix (child1, child2, d);
749 g_assert_not_reached ();
753 _gtk_css_value_unref (child1);
755 _gtk_css_value_unref (child2);
758 if (!_gtk_css_parser_try (parser, ")", TRUE))
760 _gtk_css_parser_error (parser, "Expected ')' in color definition");
761 _gtk_css_value_unref (value);
769 _gtk_css_color_value_parse (GtkCssParser *parser)
774 const char *names[] = {"rgba", "rgb", "lighter", "darker", "shade", "alpha", "mix",
775 GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME};
778 if (_gtk_css_parser_try (parser, "currentColor", TRUE))
779 return _gtk_css_color_value_new_current_color ();
781 if (_gtk_css_parser_try (parser, "transparent", TRUE))
783 GdkRGBA transparent = { 0, 0, 0, 0 };
785 return _gtk_css_color_value_new_literal (&transparent);
788 if (_gtk_css_parser_try (parser, "@", FALSE))
790 name = _gtk_css_parser_try_name (parser, TRUE);
794 value = _gtk_css_color_value_new_name (name);
798 _gtk_css_parser_error (parser, "'%s' is not a valid color color name", name);
806 for (color = 0; color < G_N_ELEMENTS (names); color++)
808 if (_gtk_css_parser_try (parser, names[color], TRUE))
812 if (color < G_N_ELEMENTS (names))
813 return _gtk_css_color_value_parse_function (parser, color);
815 if (_gtk_css_parser_try_hash_color (parser, &rgba))
816 return _gtk_css_color_value_new_literal (&rgba);
818 name = _gtk_css_parser_try_name (parser, TRUE);
821 if (gdk_rgba_parse (&rgba, name))
823 value = _gtk_css_color_value_new_literal (&rgba);
827 _gtk_css_parser_error (parser, "'%s' is not a valid color name", name);
834 _gtk_css_parser_error (parser, "Not a color definition");