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 "gtksymboliccolorprivate.h"
28 #include "gtkwin32themeprivate.h"
37 COLOR_TYPE_CURRENT_COLOR
44 GtkCssValue *last_value;
72 gtk_css_value_color_free (GtkCssValue *color)
74 if (color->last_value)
75 _gtk_css_value_unref (color->last_value);
80 g_free (color->sym_col.name);
82 case COLOR_TYPE_SHADE:
83 _gtk_css_value_unref (color->sym_col.shade.color);
85 case COLOR_TYPE_ALPHA:
86 _gtk_css_value_unref (color->sym_col.alpha.color);
89 _gtk_css_value_unref (color->sym_col.mix.color1);
90 _gtk_css_value_unref (color->sym_col.mix.color2);
92 case COLOR_TYPE_WIN32:
93 g_free (color->sym_col.win32.theme_class);
99 g_slice_free (GtkCssValue, color);
103 gtk_css_value_color_get_fallback (guint property_id,
104 GtkStyleProviderPrivate *provider,
105 GtkCssComputedValues *values,
106 GtkCssComputedValues *parent_values)
108 static const GdkRGBA transparent = { 0, 0, 0, 0 };
112 case GTK_CSS_PROPERTY_BACKGROUND_IMAGE:
113 case GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE:
114 case GTK_CSS_PROPERTY_TEXT_SHADOW:
115 case GTK_CSS_PROPERTY_ICON_SHADOW:
116 case GTK_CSS_PROPERTY_BOX_SHADOW:
117 return _gtk_css_rgba_value_new_from_rgba (&transparent);
118 case GTK_CSS_PROPERTY_COLOR:
119 case GTK_CSS_PROPERTY_BACKGROUND_COLOR:
120 case GTK_CSS_PROPERTY_BORDER_TOP_COLOR:
121 case GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR:
122 case GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR:
123 case GTK_CSS_PROPERTY_BORDER_LEFT_COLOR:
124 case GTK_CSS_PROPERTY_OUTLINE_COLOR:
125 return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
132 if (property_id < GTK_CSS_PROPERTY_N_PROPERTIES)
133 g_warning ("No fallback color defined for property '%s'",
134 _gtk_style_property_get_name (GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (property_id))));
135 return _gtk_css_rgba_value_new_from_rgba (&transparent);
140 _gtk_css_color_value_resolve (GtkCssValue *color,
141 GtkStyleProviderPrivate *provider,
142 GtkCssValue *current,
143 GtkCssDependencies current_deps,
144 GtkCssDependencies *dependencies)
146 GtkCssDependencies unused;
149 g_return_val_if_fail (color != NULL, FALSE);
150 g_return_val_if_fail (provider == NULL || GTK_IS_STYLE_PROVIDER_PRIVATE (provider), FALSE);
151 g_return_val_if_fail (current != NULL, FALSE);
153 if (dependencies == NULL)
154 dependencies = &unused;
160 case COLOR_TYPE_LITERAL:
161 return _gtk_css_value_ref (color->last_value);
162 case COLOR_TYPE_NAME:
166 named = _gtk_style_provider_private_get_color (provider, color->sym_col.name);
170 value = _gtk_css_color_value_resolve (named, provider, current, current_deps, dependencies);
174 case COLOR_TYPE_SHADE:
180 val = _gtk_css_color_value_resolve (color->sym_col.shade.color, provider, current, current_deps, dependencies);
184 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
186 _gtk_hsla_init_from_rgba (&hsla, _gtk_css_rgba_value_get_rgba (val));
187 _gtk_hsla_shade (&hsla, &hsla, color->sym_col.shade.factor);
189 _gdk_rgba_init_from_hsla (&shade, &hsla);
191 _gtk_css_value_unref (val);
193 value = _gtk_css_rgba_value_new_from_rgba (&shade);
197 case COLOR_TYPE_ALPHA:
202 val = _gtk_css_color_value_resolve (color->sym_col.alpha.color, provider, current, current_deps, dependencies);
206 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
207 alpha = *_gtk_css_rgba_value_get_rgba (val);
208 alpha.alpha = CLAMP (alpha.alpha * color->sym_col.alpha.factor, 0, 1);
210 _gtk_css_value_unref (val);
212 value = _gtk_css_rgba_value_new_from_rgba (&alpha);
219 GdkRGBA color1, color2, res;
220 GtkCssDependencies dep1, dep2;
222 val = _gtk_css_color_value_resolve (color->sym_col.mix.color1, provider, current, current_deps, &dep1);
225 color1 = *_gtk_css_rgba_value_get_rgba (val);
226 _gtk_css_value_unref (val);
228 val = _gtk_css_color_value_resolve (color->sym_col.mix.color2, provider, current, current_deps, &dep2);
231 color2 = *_gtk_css_rgba_value_get_rgba (val);
232 _gtk_css_value_unref (val);
234 *dependencies = _gtk_css_dependencies_union (dep1, dep2);
235 res.red = CLAMP (color1.red + ((color2.red - color1.red) * color->sym_col.mix.factor), 0, 1);
236 res.green = CLAMP (color1.green + ((color2.green - color1.green) * color->sym_col.mix.factor), 0, 1);
237 res.blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->sym_col.mix.factor), 0, 1);
238 res.alpha = CLAMP (color1.alpha + ((color2.alpha - color1.alpha) * color->sym_col.mix.factor), 0, 1);
240 value =_gtk_css_rgba_value_new_from_rgba (&res);
244 case COLOR_TYPE_WIN32:
248 if (!_gtk_win32_theme_color_resolve (color->sym_col.win32.theme_class,
249 color->sym_col.win32.id,
253 value = _gtk_css_rgba_value_new_from_rgba (&res);
257 case COLOR_TYPE_CURRENT_COLOR:
260 *dependencies = current_deps;
261 return _gtk_css_value_ref (current);
269 g_assert_not_reached ();
274 if (color->last_value != NULL &&
275 _gtk_css_value_equal (color->last_value, value))
277 _gtk_css_value_unref (value);
278 value = _gtk_css_value_ref (color->last_value);
282 if (color->last_value != NULL)
283 _gtk_css_value_unref (color->last_value);
284 color->last_value = _gtk_css_value_ref (value);
288 _gtk_css_rgba_value_get_rgba (value);
293 gtk_css_value_color_compute (GtkCssValue *value,
295 GtkStyleProviderPrivate *provider,
296 GtkCssComputedValues *values,
297 GtkCssComputedValues *parent_values,
298 GtkCssDependencies *dependencies)
300 GtkCssValue *resolved, *current;
301 GtkCssDependencies current_deps;
303 /* The computed value of the ‘currentColor’ keyword is the computed
304 * value of the ‘color’ property. If the ‘currentColor’ keyword is
305 * set on the ‘color’ property itself, it is treated as ‘color: inherit’.
307 if (property_id == GTK_CSS_PROPERTY_COLOR)
311 current = _gtk_css_computed_values_get_value (parent_values, GTK_CSS_PROPERTY_COLOR);
312 current_deps = GTK_CSS_EQUALS_PARENT;
316 current = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
322 current = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_COLOR);
323 current_deps = GTK_CSS_DEPENDS_ON_COLOR;
326 resolved = _gtk_css_color_value_resolve (value,
332 if (resolved == NULL)
333 return gtk_css_value_color_get_fallback (property_id, provider, values, parent_values);
339 gtk_css_value_color_equal (const GtkCssValue *value1,
340 const GtkCssValue *value2)
342 if (value1->type != value2->type)
345 switch (value1->type)
347 case COLOR_TYPE_LITERAL:
348 return _gtk_css_value_equal (value1->last_value, value2->last_value);
349 case COLOR_TYPE_NAME:
350 return g_str_equal (value1->sym_col.name, value2->sym_col.name);
351 case COLOR_TYPE_SHADE:
352 return value1->sym_col.shade.factor == value2->sym_col.shade.factor &&
353 _gtk_css_value_equal (value1->sym_col.shade.color,
354 value2->sym_col.shade.color);
355 case COLOR_TYPE_ALPHA:
356 return value1->sym_col.alpha.factor == value2->sym_col.alpha.factor &&
357 _gtk_css_value_equal (value1->sym_col.alpha.color,
358 value2->sym_col.alpha.color);
360 return value1->sym_col.mix.factor == value2->sym_col.mix.factor &&
361 _gtk_css_value_equal (value1->sym_col.mix.color1,
362 value2->sym_col.mix.color1) &&
363 _gtk_css_value_equal (value1->sym_col.mix.color2,
364 value2->sym_col.mix.color2);
365 case COLOR_TYPE_WIN32:
366 return g_str_equal (value1->sym_col.win32.theme_class, value2->sym_col.win32.theme_class) &&
367 value1->sym_col.win32.id == value2->sym_col.win32.id;
368 case COLOR_TYPE_CURRENT_COLOR:
371 g_assert_not_reached ();
377 gtk_css_value_color_transition (GtkCssValue *start,
382 return _gtk_css_color_value_new_mix (start, end, progress);
386 gtk_css_value_color_print (const GtkCssValue *value,
391 case COLOR_TYPE_LITERAL:
392 _gtk_css_value_print (value->last_value, string);
394 case COLOR_TYPE_NAME:
395 g_string_append (string, "@");
396 g_string_append (string, value->sym_col.name);
398 case COLOR_TYPE_SHADE:
400 char factor[G_ASCII_DTOSTR_BUF_SIZE];
402 g_string_append (string, "shade(");
403 _gtk_css_value_print (value->sym_col.shade.color, string);
404 g_string_append (string, ", ");
405 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.shade.factor);
406 g_string_append (string, factor);
407 g_string_append (string, ")");
410 case COLOR_TYPE_ALPHA:
412 char factor[G_ASCII_DTOSTR_BUF_SIZE];
414 g_string_append (string, "alpha(");
415 _gtk_css_value_print (value->sym_col.alpha.color, string);
416 g_string_append (string, ", ");
417 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.alpha.factor);
418 g_string_append (string, factor);
419 g_string_append (string, ")");
424 char factor[G_ASCII_DTOSTR_BUF_SIZE];
426 g_string_append (string, "mix(");
427 _gtk_css_value_print (value->sym_col.mix.color1, string);
428 g_string_append (string, ", ");
429 _gtk_css_value_print (value->sym_col.mix.color2, string);
430 g_string_append (string, ", ");
431 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.mix.factor);
432 g_string_append (string, factor);
433 g_string_append (string, ")");
436 case COLOR_TYPE_WIN32:
438 g_string_append_printf (string, GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME"(%s, %d)",
439 value->sym_col.win32.theme_class, value->sym_col.win32.id);
442 case COLOR_TYPE_CURRENT_COLOR:
443 g_string_append (string, "currentColor");
446 g_assert_not_reached ();
450 static const GtkCssValueClass GTK_CSS_VALUE_COLOR = {
451 gtk_css_value_color_free,
452 gtk_css_value_color_compute,
453 gtk_css_value_color_equal,
454 gtk_css_value_color_transition,
455 gtk_css_value_color_print
459 _gtk_css_color_value_new_literal (const GdkRGBA *color)
463 g_return_val_if_fail (color != NULL, NULL);
465 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
466 value->type = COLOR_TYPE_LITERAL;
467 value->last_value = _gtk_css_rgba_value_new_from_rgba (color);
473 _gtk_css_color_value_new_rgba (double red,
478 GdkRGBA rgba = { red, green, blue, alpha };
480 return _gtk_css_color_value_new_literal (&rgba);
484 _gtk_css_color_value_new_name (const gchar *name)
488 g_return_val_if_fail (name != NULL, NULL);
490 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
491 value->type = COLOR_TYPE_NAME;
492 value->sym_col.name = g_strdup (name);
498 _gtk_css_color_value_new_shade (GtkCssValue *color,
503 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
505 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
506 value->type = COLOR_TYPE_SHADE;
507 value->sym_col.shade.color = _gtk_css_value_ref (color);
508 value->sym_col.shade.factor = factor;
514 _gtk_css_color_value_new_alpha (GtkCssValue *color,
519 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
521 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
522 value->type = COLOR_TYPE_ALPHA;
523 value->sym_col.alpha.color = _gtk_css_value_ref (color);
524 value->sym_col.alpha.factor = factor;
530 _gtk_css_color_value_new_mix (GtkCssValue *color1,
536 g_return_val_if_fail (color1->class == >K_CSS_VALUE_COLOR, NULL);
537 g_return_val_if_fail (color2->class == >K_CSS_VALUE_COLOR, NULL);
539 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
540 value->type = COLOR_TYPE_MIX;
541 value->sym_col.mix.color1 = _gtk_css_value_ref (color1);
542 value->sym_col.mix.color2 = _gtk_css_value_ref (color2);
543 value->sym_col.mix.factor = factor;
549 _gtk_css_color_value_new_win32 (const gchar *theme_class,
554 g_return_val_if_fail (theme_class != NULL, NULL);
556 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
557 value->type = COLOR_TYPE_WIN32;
558 value->sym_col.win32.theme_class = g_strdup (theme_class);
559 value->sym_col.win32.id = id;
565 _gtk_css_color_value_new_current_color (void)
567 static GtkCssValue current_color = { >K_CSS_VALUE_COLOR, 1, COLOR_TYPE_CURRENT_COLOR, NULL, };
569 return _gtk_css_value_ref (¤t_color);
584 gtk_css_color_parse_win32 (GtkCssParser *parser)
590 class = _gtk_css_parser_try_name (parser, TRUE);
593 _gtk_css_parser_error (parser,
594 "Expected name as first argument to '-gtk-win32-color'");
598 if (! _gtk_css_parser_try (parser, ",", TRUE))
601 _gtk_css_parser_error (parser,
606 if (!_gtk_css_parser_try_int (parser, &id))
609 _gtk_css_parser_error (parser, "Expected a valid integer value");
613 color = _gtk_css_color_value_new_win32 (class, id);
619 _gtk_css_color_value_parse_function (GtkCssParser *parser,
620 ColorParseType color)
623 GtkCssValue *child1, *child2;
626 if (!_gtk_css_parser_try (parser, "(", TRUE))
628 _gtk_css_parser_error (parser, "Missing opening bracket in color definition");
632 if (color == COLOR_RGB || color == COLOR_RGBA)
638 for (i = 0; i < 3; i++)
640 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
642 _gtk_css_parser_error (parser, "Expected ',' in color definition");
646 if (!_gtk_css_parser_try_double (parser, &tmp))
648 _gtk_css_parser_error (parser, "Invalid number for color value");
651 if (_gtk_css_parser_try (parser, "%", TRUE))
662 g_assert_not_reached ();
665 if (color == COLOR_RGBA)
667 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
669 _gtk_css_parser_error (parser, "Expected ',' in color definition");
673 if (!_gtk_css_parser_try_double (parser, &rgba.alpha))
675 _gtk_css_parser_error (parser, "Invalid number for alpha value");
682 value = _gtk_css_color_value_new_literal (&rgba);
684 else if (color == COLOR_WIN32)
686 value = gtk_css_color_parse_win32 (parser);
692 child1 = _gtk_css_color_value_parse (parser);
696 if (color == COLOR_MIX)
698 if (!_gtk_css_parser_try (parser, ",", TRUE))
700 _gtk_css_parser_error (parser, "Expected ',' in color definition");
701 _gtk_css_value_unref (child1);
705 child2 = _gtk_css_color_value_parse (parser);
708 _gtk_css_value_unref (child1);
715 if (color == COLOR_LIGHTER)
717 else if (color == COLOR_DARKER)
721 if (!_gtk_css_parser_try (parser, ",", TRUE))
723 _gtk_css_parser_error (parser, "Expected ',' in color definition");
724 _gtk_css_value_unref (child1);
726 _gtk_css_value_unref (child2);
730 if (!_gtk_css_parser_try_double (parser, &d))
732 _gtk_css_parser_error (parser, "Expected number in color definition");
733 _gtk_css_value_unref (child1);
735 _gtk_css_value_unref (child2);
745 value = _gtk_css_color_value_new_shade (child1, d);
748 value = _gtk_css_color_value_new_alpha (child1, d);
751 value = _gtk_css_color_value_new_mix (child1, child2, d);
754 g_assert_not_reached ();
758 _gtk_css_value_unref (child1);
760 _gtk_css_value_unref (child2);
763 if (!_gtk_css_parser_try (parser, ")", TRUE))
765 _gtk_css_parser_error (parser, "Expected ')' in color definition");
766 _gtk_css_value_unref (value);
774 _gtk_css_color_value_parse (GtkCssParser *parser)
779 const char *names[] = {"rgba", "rgb", "lighter", "darker", "shade", "alpha", "mix",
780 GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME};
783 if (_gtk_css_parser_try (parser, "currentColor", TRUE))
784 return _gtk_css_color_value_new_current_color ();
786 if (_gtk_css_parser_try (parser, "transparent", TRUE))
788 GdkRGBA transparent = { 0, 0, 0, 0 };
790 return _gtk_css_color_value_new_literal (&transparent);
793 if (_gtk_css_parser_try (parser, "@", FALSE))
795 name = _gtk_css_parser_try_name (parser, TRUE);
799 value = _gtk_css_color_value_new_name (name);
803 _gtk_css_parser_error (parser, "'%s' is not a valid color color name", name);
811 for (color = 0; color < G_N_ELEMENTS (names); color++)
813 if (_gtk_css_parser_try (parser, names[color], TRUE))
817 if (color < G_N_ELEMENTS (names))
818 return _gtk_css_color_value_parse_function (parser, color);
820 if (_gtk_css_parser_try_hash_color (parser, &rgba))
821 return _gtk_css_color_value_new_literal (&rgba);
823 name = _gtk_css_parser_try_name (parser, TRUE);
826 if (gdk_rgba_parse (&rgba, name))
828 value = _gtk_css_color_value_new_literal (&rgba);
832 _gtk_css_parser_error (parser, "'%s' is not a valid color name", name);
839 _gtk_css_parser_error (parser, "Not a color definition");