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_full (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:
164 GtkSymbolicColor *symbolic;
166 symbolic = _gtk_style_provider_private_get_color (provider, color->sym_col.name);
171 value = _gtk_symbolic_color_resolve_full (symbolic, provider, current, current_deps, dependencies);
175 case COLOR_TYPE_SHADE:
181 val = gtk_css_color_value_resolve_full (color->sym_col.shade.color, provider, current, current_deps, dependencies);
185 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
187 _gtk_hsla_init_from_rgba (&hsla, _gtk_css_rgba_value_get_rgba (val));
189 hsla.lightness *= color->sym_col.shade.factor;
190 hsla.lightness = CLAMP (hsla.lightness, 0.0, 1.0);
192 hsla.saturation *= color->sym_col.shade.factor;
193 hsla.saturation = CLAMP (hsla.saturation, 0.0, 1.0);
195 _gdk_rgba_init_from_hsla (&shade, &hsla);
197 _gtk_css_value_unref (val);
199 value = _gtk_css_rgba_value_new_from_rgba (&shade);
203 case COLOR_TYPE_ALPHA:
208 val = gtk_css_color_value_resolve_full (color->sym_col.alpha.color, provider, current, current_deps, dependencies);
212 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
213 alpha = *_gtk_css_rgba_value_get_rgba (val);
214 alpha.alpha = CLAMP (alpha.alpha * color->sym_col.alpha.factor, 0, 1);
216 _gtk_css_value_unref (val);
218 value = _gtk_css_rgba_value_new_from_rgba (&alpha);
225 GdkRGBA color1, color2, res;
226 GtkCssDependencies dep1, dep2;
228 val = gtk_css_color_value_resolve_full (color->sym_col.mix.color1, provider, current, current_deps, &dep1);
231 color1 = *_gtk_css_rgba_value_get_rgba (val);
232 _gtk_css_value_unref (val);
234 val = gtk_css_color_value_resolve_full (color->sym_col.mix.color2, provider, current, current_deps, &dep2);
237 color2 = *_gtk_css_rgba_value_get_rgba (val);
238 _gtk_css_value_unref (val);
240 *dependencies = _gtk_css_dependencies_union (dep1, dep2);
241 res.red = CLAMP (color1.red + ((color2.red - color1.red) * color->sym_col.mix.factor), 0, 1);
242 res.green = CLAMP (color1.green + ((color2.green - color1.green) * color->sym_col.mix.factor), 0, 1);
243 res.blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->sym_col.mix.factor), 0, 1);
244 res.alpha = CLAMP (color1.alpha + ((color2.alpha - color1.alpha) * color->sym_col.mix.factor), 0, 1);
246 value =_gtk_css_rgba_value_new_from_rgba (&res);
250 case COLOR_TYPE_WIN32:
254 if (!_gtk_win32_theme_color_resolve (color->sym_col.win32.theme_class,
255 color->sym_col.win32.id,
259 value = _gtk_css_rgba_value_new_from_rgba (&res);
263 case COLOR_TYPE_CURRENT_COLOR:
266 *dependencies = current_deps;
267 return _gtk_css_value_ref (current);
275 g_assert_not_reached ();
280 if (color->last_value != NULL &&
281 _gtk_css_value_equal (color->last_value, value))
283 _gtk_css_value_unref (value);
284 value = _gtk_css_value_ref (color->last_value);
288 if (color->last_value != NULL)
289 _gtk_css_value_unref (color->last_value);
290 color->last_value = _gtk_css_value_ref (value);
294 _gtk_css_rgba_value_get_rgba (value);
299 gtk_css_value_color_compute (GtkCssValue *value,
301 GtkStyleProviderPrivate *provider,
302 GtkCssComputedValues *values,
303 GtkCssComputedValues *parent_values,
304 GtkCssDependencies *dependencies)
306 GtkCssValue *resolved, *current;
307 GtkCssDependencies current_deps;
309 /* The computed value of the ‘currentColor’ keyword is the computed
310 * value of the ‘color’ property. If the ‘currentColor’ keyword is
311 * set on the ‘color’ property itself, it is treated as ‘color: inherit’.
313 if (property_id == GTK_CSS_PROPERTY_COLOR)
317 current = _gtk_css_computed_values_get_value (parent_values, GTK_CSS_PROPERTY_COLOR);
318 current_deps = GTK_CSS_EQUALS_PARENT;
322 current = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
328 current = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_COLOR);
329 current_deps = GTK_CSS_DEPENDS_ON_COLOR;
332 resolved = gtk_css_color_value_resolve_full (value,
338 if (resolved == NULL)
339 return gtk_css_value_color_get_fallback (property_id, provider, values, parent_values);
345 gtk_css_value_color_equal (const GtkCssValue *value1,
346 const GtkCssValue *value2)
348 if (value1->type != value2->type)
351 switch (value1->type)
353 case COLOR_TYPE_LITERAL:
354 return _gtk_css_value_equal (value1->last_value, value2->last_value);
355 case COLOR_TYPE_NAME:
356 return g_str_equal (value1->sym_col.name, value2->sym_col.name);
357 case COLOR_TYPE_SHADE:
358 return value1->sym_col.shade.factor == value2->sym_col.shade.factor &&
359 _gtk_css_value_equal (value1->sym_col.shade.color,
360 value2->sym_col.shade.color);
361 case COLOR_TYPE_ALPHA:
362 return value1->sym_col.alpha.factor == value2->sym_col.alpha.factor &&
363 _gtk_css_value_equal (value1->sym_col.alpha.color,
364 value2->sym_col.alpha.color);
366 return value1->sym_col.mix.factor == value2->sym_col.mix.factor &&
367 _gtk_css_value_equal (value1->sym_col.mix.color1,
368 value2->sym_col.mix.color1) &&
369 _gtk_css_value_equal (value1->sym_col.mix.color2,
370 value2->sym_col.mix.color2);
371 case COLOR_TYPE_WIN32:
372 return g_str_equal (value1->sym_col.win32.theme_class, value2->sym_col.win32.theme_class) &&
373 value1->sym_col.win32.id == value2->sym_col.win32.id;
374 case COLOR_TYPE_CURRENT_COLOR:
377 g_assert_not_reached ();
383 gtk_css_value_color_transition (GtkCssValue *start,
388 return _gtk_css_color_value_new_mix (start, end, progress);
392 gtk_css_value_color_print (const GtkCssValue *value,
397 case COLOR_TYPE_LITERAL:
398 _gtk_css_value_print (value->last_value, string);
400 case COLOR_TYPE_NAME:
401 g_string_append (string, "@");
402 g_string_append (string, value->sym_col.name);
404 case COLOR_TYPE_SHADE:
406 char factor[G_ASCII_DTOSTR_BUF_SIZE];
408 g_string_append (string, "shade(");
409 _gtk_css_value_print (value->sym_col.shade.color, string);
410 g_string_append (string, ", ");
411 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.shade.factor);
412 g_string_append (string, factor);
413 g_string_append (string, ")");
416 case COLOR_TYPE_ALPHA:
418 char factor[G_ASCII_DTOSTR_BUF_SIZE];
420 g_string_append (string, "alpha(");
421 _gtk_css_value_print (value->sym_col.alpha.color, string);
422 g_string_append (string, ", ");
423 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.alpha.factor);
424 g_string_append (string, factor);
425 g_string_append (string, ")");
430 char factor[G_ASCII_DTOSTR_BUF_SIZE];
432 g_string_append (string, "mix(");
433 _gtk_css_value_print (value->sym_col.mix.color1, string);
434 g_string_append (string, ", ");
435 _gtk_css_value_print (value->sym_col.mix.color2, string);
436 g_string_append (string, ", ");
437 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.mix.factor);
438 g_string_append (string, factor);
439 g_string_append (string, ")");
442 case COLOR_TYPE_WIN32:
444 g_string_append_printf (string, GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME"(%s, %d)",
445 value->sym_col.win32.theme_class, value->sym_col.win32.id);
448 case COLOR_TYPE_CURRENT_COLOR:
449 g_string_append (string, "currentColor");
452 g_assert_not_reached ();
456 static const GtkCssValueClass GTK_CSS_VALUE_COLOR = {
457 gtk_css_value_color_free,
458 gtk_css_value_color_compute,
459 gtk_css_value_color_equal,
460 gtk_css_value_color_transition,
461 gtk_css_value_color_print
465 _gtk_css_color_value_new_literal (const GdkRGBA *color)
469 g_return_val_if_fail (color != NULL, NULL);
471 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
472 value->type = COLOR_TYPE_LITERAL;
473 value->last_value = _gtk_css_rgba_value_new_from_rgba (color);
479 _gtk_css_color_value_new_rgba (double red,
484 GdkRGBA rgba = { red, green, blue, alpha };
486 return _gtk_css_color_value_new_literal (&rgba);
490 _gtk_css_color_value_new_name (const gchar *name)
494 g_return_val_if_fail (name != NULL, NULL);
496 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
497 value->type = COLOR_TYPE_NAME;
498 value->sym_col.name = g_strdup (name);
504 _gtk_css_color_value_new_shade (GtkCssValue *color,
509 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
511 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
512 value->type = COLOR_TYPE_SHADE;
513 value->sym_col.shade.color = _gtk_css_value_ref (color);
514 value->sym_col.shade.factor = factor;
520 _gtk_css_color_value_new_alpha (GtkCssValue *color,
525 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
527 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
528 value->type = COLOR_TYPE_ALPHA;
529 value->sym_col.alpha.color = _gtk_css_value_ref (color);
530 value->sym_col.alpha.factor = factor;
536 _gtk_css_color_value_new_mix (GtkCssValue *color1,
542 g_return_val_if_fail (color1->class == >K_CSS_VALUE_COLOR, NULL);
543 g_return_val_if_fail (color2->class == >K_CSS_VALUE_COLOR, NULL);
545 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
546 value->type = COLOR_TYPE_MIX;
547 value->sym_col.mix.color1 = _gtk_css_value_ref (color1);
548 value->sym_col.mix.color2 = _gtk_css_value_ref (color2);
549 value->sym_col.mix.factor = factor;
555 _gtk_css_color_value_new_win32 (const gchar *theme_class,
560 g_return_val_if_fail (theme_class != NULL, NULL);
562 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
563 value->type = COLOR_TYPE_WIN32;
564 value->sym_col.win32.theme_class = g_strdup (theme_class);
565 value->sym_col.win32.id = id;
571 _gtk_css_color_value_new_current_color (void)
573 static GtkCssValue current_color = { >K_CSS_VALUE_COLOR, 1, COLOR_TYPE_CURRENT_COLOR, NULL, };
575 return _gtk_css_value_ref (¤t_color);
590 gtk_css_color_parse_win32 (GtkCssParser *parser)
596 class = _gtk_css_parser_try_name (parser, TRUE);
599 _gtk_css_parser_error (parser,
600 "Expected name as first argument to '-gtk-win32-color'");
604 if (! _gtk_css_parser_try (parser, ",", TRUE))
607 _gtk_css_parser_error (parser,
612 if (!_gtk_css_parser_try_int (parser, &id))
615 _gtk_css_parser_error (parser, "Expected a valid integer value");
619 color = _gtk_css_color_value_new_win32 (class, id);
625 _gtk_css_color_value_parse_function (GtkCssParser *parser,
626 ColorParseType color)
629 GtkCssValue *child1, *child2;
632 if (!_gtk_css_parser_try (parser, "(", TRUE))
634 _gtk_css_parser_error (parser, "Missing opening bracket in color definition");
638 if (color == COLOR_RGB || color == COLOR_RGBA)
644 for (i = 0; i < 3; i++)
646 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
648 _gtk_css_parser_error (parser, "Expected ',' in color definition");
652 if (!_gtk_css_parser_try_double (parser, &tmp))
654 _gtk_css_parser_error (parser, "Invalid number for color value");
657 if (_gtk_css_parser_try (parser, "%", TRUE))
668 g_assert_not_reached ();
671 if (color == COLOR_RGBA)
673 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
675 _gtk_css_parser_error (parser, "Expected ',' in color definition");
679 if (!_gtk_css_parser_try_double (parser, &rgba.alpha))
681 _gtk_css_parser_error (parser, "Invalid number for alpha value");
688 value = _gtk_css_color_value_new_literal (&rgba);
690 else if (color == COLOR_WIN32)
692 value = gtk_css_color_parse_win32 (parser);
698 child1 = _gtk_css_color_value_parse (parser);
702 if (color == COLOR_MIX)
704 if (!_gtk_css_parser_try (parser, ",", TRUE))
706 _gtk_css_parser_error (parser, "Expected ',' in color definition");
707 _gtk_css_value_unref (child1);
711 child2 = _gtk_css_color_value_parse (parser);
714 _gtk_css_value_unref (child1);
721 if (color == COLOR_LIGHTER)
723 else if (color == COLOR_DARKER)
727 if (!_gtk_css_parser_try (parser, ",", TRUE))
729 _gtk_css_parser_error (parser, "Expected ',' in color definition");
730 _gtk_css_value_unref (child1);
732 _gtk_css_value_unref (child2);
736 if (!_gtk_css_parser_try_double (parser, &d))
738 _gtk_css_parser_error (parser, "Expected number in color definition");
739 _gtk_css_value_unref (child1);
741 _gtk_css_value_unref (child2);
751 value = _gtk_css_color_value_new_shade (child1, d);
754 value = _gtk_css_color_value_new_alpha (child1, d);
757 value = _gtk_css_color_value_new_mix (child1, child2, d);
760 g_assert_not_reached ();
764 _gtk_css_value_unref (child1);
766 _gtk_css_value_unref (child2);
769 if (!_gtk_css_parser_try (parser, ")", TRUE))
771 _gtk_css_parser_error (parser, "Expected ')' in color definition");
772 _gtk_css_value_unref (value);
780 _gtk_css_color_value_parse (GtkCssParser *parser)
785 const char *names[] = {"rgba", "rgb", "lighter", "darker", "shade", "alpha", "mix",
786 GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME};
789 if (_gtk_css_parser_try (parser, "currentColor", TRUE))
790 return _gtk_css_color_value_new_current_color ();
792 if (_gtk_css_parser_try (parser, "transparent", TRUE))
794 GdkRGBA transparent = { 0, 0, 0, 0 };
796 return _gtk_css_color_value_new_literal (&transparent);
799 if (_gtk_css_parser_try (parser, "@", FALSE))
801 name = _gtk_css_parser_try_name (parser, TRUE);
805 value = _gtk_css_color_value_new_name (name);
809 _gtk_css_parser_error (parser, "'%s' is not a valid color color name", name);
817 for (color = 0; color < G_N_ELEMENTS (names); color++)
819 if (_gtk_css_parser_try (parser, names[color], TRUE))
823 if (color < G_N_ELEMENTS (names))
824 return _gtk_css_color_value_parse_function (parser, color);
826 if (_gtk_css_parser_try_hash_color (parser, &rgba))
827 return _gtk_css_color_value_new_literal (&rgba);
829 name = _gtk_css_parser_try_name (parser, TRUE);
832 if (gdk_rgba_parse (&rgba, name))
834 value = _gtk_css_color_value_new_literal (&rgba);
838 _gtk_css_parser_error (parser, "'%s' is not a valid color name", name);
845 _gtk_css_parser_error (parser, "Not a color definition");