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;
159 case COLOR_TYPE_LITERAL:
160 return _gtk_css_value_ref (color->last_value);
161 case COLOR_TYPE_NAME:
165 named = _gtk_style_provider_private_get_color (provider, color->sym_col.name);
169 value = _gtk_css_color_value_resolve (named, provider, current, current_deps, dependencies);
173 case COLOR_TYPE_SHADE:
179 val = _gtk_css_color_value_resolve (color->sym_col.shade.color, provider, current, current_deps, dependencies);
183 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
185 _gtk_hsla_init_from_rgba (&hsla, _gtk_css_rgba_value_get_rgba (val));
186 _gtk_hsla_shade (&hsla, &hsla, color->sym_col.shade.factor);
188 _gdk_rgba_init_from_hsla (&shade, &hsla);
190 _gtk_css_value_unref (val);
192 value = _gtk_css_rgba_value_new_from_rgba (&shade);
196 case COLOR_TYPE_ALPHA:
201 val = _gtk_css_color_value_resolve (color->sym_col.alpha.color, provider, current, current_deps, dependencies);
205 *dependencies = _gtk_css_dependencies_union (*dependencies, 0);
206 alpha = *_gtk_css_rgba_value_get_rgba (val);
207 alpha.alpha = CLAMP (alpha.alpha * color->sym_col.alpha.factor, 0, 1);
209 _gtk_css_value_unref (val);
211 value = _gtk_css_rgba_value_new_from_rgba (&alpha);
218 GdkRGBA color1, color2, res;
219 GtkCssDependencies dep1, dep2;
221 val = _gtk_css_color_value_resolve (color->sym_col.mix.color1, provider, current, current_deps, &dep1);
224 color1 = *_gtk_css_rgba_value_get_rgba (val);
225 _gtk_css_value_unref (val);
227 val = _gtk_css_color_value_resolve (color->sym_col.mix.color2, provider, current, current_deps, &dep2);
230 color2 = *_gtk_css_rgba_value_get_rgba (val);
231 _gtk_css_value_unref (val);
233 *dependencies = _gtk_css_dependencies_union (dep1, dep2);
234 res.red = CLAMP (color1.red + ((color2.red - color1.red) * color->sym_col.mix.factor), 0, 1);
235 res.green = CLAMP (color1.green + ((color2.green - color1.green) * color->sym_col.mix.factor), 0, 1);
236 res.blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->sym_col.mix.factor), 0, 1);
237 res.alpha = CLAMP (color1.alpha + ((color2.alpha - color1.alpha) * color->sym_col.mix.factor), 0, 1);
239 value =_gtk_css_rgba_value_new_from_rgba (&res);
243 case COLOR_TYPE_WIN32:
247 if (!_gtk_win32_theme_color_resolve (color->sym_col.win32.theme_class,
248 color->sym_col.win32.id,
252 value = _gtk_css_rgba_value_new_from_rgba (&res);
256 case COLOR_TYPE_CURRENT_COLOR:
259 *dependencies = current_deps;
260 return _gtk_css_value_ref (current);
268 g_assert_not_reached ();
273 if (color->last_value != NULL &&
274 _gtk_css_value_equal (color->last_value, value))
276 _gtk_css_value_unref (value);
277 value = _gtk_css_value_ref (color->last_value);
281 if (color->last_value != NULL)
282 _gtk_css_value_unref (color->last_value);
283 color->last_value = _gtk_css_value_ref (value);
291 gtk_css_value_color_compute (GtkCssValue *value,
293 GtkStyleProviderPrivate *provider,
294 GtkCssComputedValues *values,
295 GtkCssComputedValues *parent_values,
296 GtkCssDependencies *dependencies)
298 GtkCssValue *resolved, *current;
299 GtkCssDependencies current_deps;
301 /* The computed value of the ‘currentColor’ keyword is the computed
302 * value of the ‘color’ property. If the ‘currentColor’ keyword is
303 * set on the ‘color’ property itself, it is treated as ‘color: inherit’.
305 if (property_id == GTK_CSS_PROPERTY_COLOR)
309 current = _gtk_css_computed_values_get_value (parent_values, GTK_CSS_PROPERTY_COLOR);
310 current_deps = GTK_CSS_EQUALS_PARENT;
314 current = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
320 current = _gtk_css_computed_values_get_value (values, GTK_CSS_PROPERTY_COLOR);
321 current_deps = GTK_CSS_DEPENDS_ON_COLOR;
324 resolved = _gtk_css_color_value_resolve (value,
330 if (resolved == NULL)
331 return gtk_css_value_color_get_fallback (property_id, provider, values, parent_values);
337 gtk_css_value_color_equal (const GtkCssValue *value1,
338 const GtkCssValue *value2)
340 if (value1->type != value2->type)
343 switch (value1->type)
345 case COLOR_TYPE_LITERAL:
346 return _gtk_css_value_equal (value1->last_value, value2->last_value);
347 case COLOR_TYPE_NAME:
348 return g_str_equal (value1->sym_col.name, value2->sym_col.name);
349 case COLOR_TYPE_SHADE:
350 return value1->sym_col.shade.factor == value2->sym_col.shade.factor &&
351 _gtk_css_value_equal (value1->sym_col.shade.color,
352 value2->sym_col.shade.color);
353 case COLOR_TYPE_ALPHA:
354 return value1->sym_col.alpha.factor == value2->sym_col.alpha.factor &&
355 _gtk_css_value_equal (value1->sym_col.alpha.color,
356 value2->sym_col.alpha.color);
358 return value1->sym_col.mix.factor == value2->sym_col.mix.factor &&
359 _gtk_css_value_equal (value1->sym_col.mix.color1,
360 value2->sym_col.mix.color1) &&
361 _gtk_css_value_equal (value1->sym_col.mix.color2,
362 value2->sym_col.mix.color2);
363 case COLOR_TYPE_WIN32:
364 return g_str_equal (value1->sym_col.win32.theme_class, value2->sym_col.win32.theme_class) &&
365 value1->sym_col.win32.id == value2->sym_col.win32.id;
366 case COLOR_TYPE_CURRENT_COLOR:
369 g_assert_not_reached ();
375 gtk_css_value_color_transition (GtkCssValue *start,
380 return _gtk_css_color_value_new_mix (start, end, progress);
384 gtk_css_value_color_print (const GtkCssValue *value,
389 case COLOR_TYPE_LITERAL:
390 _gtk_css_value_print (value->last_value, string);
392 case COLOR_TYPE_NAME:
393 g_string_append (string, "@");
394 g_string_append (string, value->sym_col.name);
396 case COLOR_TYPE_SHADE:
398 char factor[G_ASCII_DTOSTR_BUF_SIZE];
400 g_string_append (string, "shade(");
401 _gtk_css_value_print (value->sym_col.shade.color, string);
402 g_string_append (string, ", ");
403 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.shade.factor);
404 g_string_append (string, factor);
405 g_string_append (string, ")");
408 case COLOR_TYPE_ALPHA:
410 char factor[G_ASCII_DTOSTR_BUF_SIZE];
412 g_string_append (string, "alpha(");
413 _gtk_css_value_print (value->sym_col.alpha.color, string);
414 g_string_append (string, ", ");
415 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.alpha.factor);
416 g_string_append (string, factor);
417 g_string_append (string, ")");
422 char factor[G_ASCII_DTOSTR_BUF_SIZE];
424 g_string_append (string, "mix(");
425 _gtk_css_value_print (value->sym_col.mix.color1, string);
426 g_string_append (string, ", ");
427 _gtk_css_value_print (value->sym_col.mix.color2, string);
428 g_string_append (string, ", ");
429 g_ascii_dtostr (factor, sizeof (factor), value->sym_col.mix.factor);
430 g_string_append (string, factor);
431 g_string_append (string, ")");
434 case COLOR_TYPE_WIN32:
436 g_string_append_printf (string, GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME"(%s, %d)",
437 value->sym_col.win32.theme_class, value->sym_col.win32.id);
440 case COLOR_TYPE_CURRENT_COLOR:
441 g_string_append (string, "currentColor");
444 g_assert_not_reached ();
448 static const GtkCssValueClass GTK_CSS_VALUE_COLOR = {
449 gtk_css_value_color_free,
450 gtk_css_value_color_compute,
451 gtk_css_value_color_equal,
452 gtk_css_value_color_transition,
453 gtk_css_value_color_print
457 _gtk_css_color_value_new_literal (const GdkRGBA *color)
461 g_return_val_if_fail (color != NULL, NULL);
463 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
464 value->type = COLOR_TYPE_LITERAL;
465 value->last_value = _gtk_css_rgba_value_new_from_rgba (color);
471 _gtk_css_color_value_new_rgba (double red,
476 GdkRGBA rgba = { red, green, blue, alpha };
478 return _gtk_css_color_value_new_literal (&rgba);
482 _gtk_css_color_value_new_name (const gchar *name)
486 g_return_val_if_fail (name != NULL, NULL);
488 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
489 value->type = COLOR_TYPE_NAME;
490 value->sym_col.name = g_strdup (name);
496 _gtk_css_color_value_new_shade (GtkCssValue *color,
501 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
503 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
504 value->type = COLOR_TYPE_SHADE;
505 value->sym_col.shade.color = _gtk_css_value_ref (color);
506 value->sym_col.shade.factor = factor;
512 _gtk_css_color_value_new_alpha (GtkCssValue *color,
517 g_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
519 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
520 value->type = COLOR_TYPE_ALPHA;
521 value->sym_col.alpha.color = _gtk_css_value_ref (color);
522 value->sym_col.alpha.factor = factor;
528 _gtk_css_color_value_new_mix (GtkCssValue *color1,
534 g_return_val_if_fail (color1->class == >K_CSS_VALUE_COLOR, NULL);
535 g_return_val_if_fail (color2->class == >K_CSS_VALUE_COLOR, NULL);
537 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
538 value->type = COLOR_TYPE_MIX;
539 value->sym_col.mix.color1 = _gtk_css_value_ref (color1);
540 value->sym_col.mix.color2 = _gtk_css_value_ref (color2);
541 value->sym_col.mix.factor = factor;
547 _gtk_css_color_value_new_win32 (const gchar *theme_class,
552 g_return_val_if_fail (theme_class != NULL, NULL);
554 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
555 value->type = COLOR_TYPE_WIN32;
556 value->sym_col.win32.theme_class = g_strdup (theme_class);
557 value->sym_col.win32.id = id;
563 _gtk_css_color_value_new_current_color (void)
565 static GtkCssValue current_color = { >K_CSS_VALUE_COLOR, 1, COLOR_TYPE_CURRENT_COLOR, NULL, };
567 return _gtk_css_value_ref (¤t_color);
582 gtk_css_color_parse_win32 (GtkCssParser *parser)
588 class = _gtk_css_parser_try_name (parser, TRUE);
591 _gtk_css_parser_error (parser,
592 "Expected name as first argument to '-gtk-win32-color'");
596 if (! _gtk_css_parser_try (parser, ",", TRUE))
599 _gtk_css_parser_error (parser,
604 if (!_gtk_css_parser_try_int (parser, &id))
607 _gtk_css_parser_error (parser, "Expected a valid integer value");
611 color = _gtk_css_color_value_new_win32 (class, id);
617 _gtk_css_color_value_parse_function (GtkCssParser *parser,
618 ColorParseType color)
621 GtkCssValue *child1, *child2;
624 if (!_gtk_css_parser_try (parser, "(", TRUE))
626 _gtk_css_parser_error (parser, "Missing opening bracket in color definition");
630 if (color == COLOR_RGB || color == COLOR_RGBA)
636 for (i = 0; i < 3; i++)
638 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
640 _gtk_css_parser_error (parser, "Expected ',' in color definition");
644 if (!_gtk_css_parser_try_double (parser, &tmp))
646 _gtk_css_parser_error (parser, "Invalid number for color value");
649 if (_gtk_css_parser_try (parser, "%", TRUE))
660 g_assert_not_reached ();
663 if (color == COLOR_RGBA)
665 if (i > 0 && !_gtk_css_parser_try (parser, ",", TRUE))
667 _gtk_css_parser_error (parser, "Expected ',' in color definition");
671 if (!_gtk_css_parser_try_double (parser, &rgba.alpha))
673 _gtk_css_parser_error (parser, "Invalid number for alpha value");
680 value = _gtk_css_color_value_new_literal (&rgba);
682 else if (color == COLOR_WIN32)
684 value = gtk_css_color_parse_win32 (parser);
690 child1 = _gtk_css_color_value_parse (parser);
694 if (color == COLOR_MIX)
696 if (!_gtk_css_parser_try (parser, ",", TRUE))
698 _gtk_css_parser_error (parser, "Expected ',' in color definition");
699 _gtk_css_value_unref (child1);
703 child2 = _gtk_css_color_value_parse (parser);
706 _gtk_css_value_unref (child1);
713 if (color == COLOR_LIGHTER)
715 else if (color == COLOR_DARKER)
719 if (!_gtk_css_parser_try (parser, ",", TRUE))
721 _gtk_css_parser_error (parser, "Expected ',' in color definition");
722 _gtk_css_value_unref (child1);
724 _gtk_css_value_unref (child2);
728 if (!_gtk_css_parser_try_double (parser, &d))
730 _gtk_css_parser_error (parser, "Expected number in color definition");
731 _gtk_css_value_unref (child1);
733 _gtk_css_value_unref (child2);
743 value = _gtk_css_color_value_new_shade (child1, d);
746 value = _gtk_css_color_value_new_alpha (child1, d);
749 value = _gtk_css_color_value_new_mix (child1, child2, d);
752 g_assert_not_reached ();
756 _gtk_css_value_unref (child1);
758 _gtk_css_value_unref (child2);
761 if (!_gtk_css_parser_try (parser, ")", TRUE))
763 _gtk_css_parser_error (parser, "Expected ')' in color definition");
764 _gtk_css_value_unref (value);
772 _gtk_css_color_value_parse (GtkCssParser *parser)
777 const char *names[] = {"rgba", "rgb", "lighter", "darker", "shade", "alpha", "mix",
778 GTK_WIN32_THEME_SYMBOLIC_COLOR_NAME};
781 if (_gtk_css_parser_try (parser, "currentColor", TRUE))
782 return _gtk_css_color_value_new_current_color ();
784 if (_gtk_css_parser_try (parser, "transparent", TRUE))
786 GdkRGBA transparent = { 0, 0, 0, 0 };
788 return _gtk_css_color_value_new_literal (&transparent);
791 if (_gtk_css_parser_try (parser, "@", FALSE))
793 name = _gtk_css_parser_try_name (parser, TRUE);
797 value = _gtk_css_color_value_new_name (name);
801 _gtk_css_parser_error (parser, "'%s' is not a valid color color name", name);
809 for (color = 0; color < G_N_ELEMENTS (names); color++)
811 if (_gtk_css_parser_try (parser, names[color], TRUE))
815 if (color < G_N_ELEMENTS (names))
816 return _gtk_css_color_value_parse_function (parser, color);
818 if (_gtk_css_parser_try_hash_color (parser, &rgba))
819 return _gtk_css_color_value_new_literal (&rgba);
821 name = _gtk_css_parser_try_name (parser, TRUE);
824 if (gdk_rgba_parse (&rgba, name))
826 value = _gtk_css_color_value_new_literal (&rgba);
830 _gtk_css_parser_error (parser, "'%s' is not a valid color name", name);
837 _gtk_css_parser_error (parser, "Not a color definition");