1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2011 Red Hat, Inc.
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 "gtkcssrgbavalueprivate.h"
22 #include "gtkstylecontextprivate.h"
23 #include "gtksymboliccolorprivate.h"
31 gtk_css_value_rgba_free (GtkCssValue *value)
33 g_slice_free (GtkCssValue, value);
37 gtk_css_value_rgba_equal (const GtkCssValue *rgba1,
38 const GtkCssValue *rgba2)
40 return gdk_rgba_equal (&rgba1->rgba, &rgba2->rgba);
44 gtk_css_value_rgba_transition (GtkCssValue *start,
50 progress = CLAMP (progress, 0, 1);
51 transition.red = start->rgba.red + (end->rgba.red - start->rgba.red) * progress;
52 transition.green = start->rgba.green + (end->rgba.green - start->rgba.green) * progress;
53 transition.blue = start->rgba.blue + (end->rgba.blue - start->rgba.blue) * progress;
54 transition.alpha = start->rgba.alpha + (end->rgba.alpha - start->rgba.alpha) * progress;
56 return _gtk_css_rgba_value_new_from_rgba (&transition);
60 gtk_css_value_rgba_print (const GtkCssValue *rgba,
63 char *s = gdk_rgba_to_string (&rgba->rgba);
64 g_string_append (string, s);
68 static const GtkCssValueClass GTK_CSS_VALUE_RGBA = {
69 gtk_css_value_rgba_free,
70 gtk_css_value_rgba_equal,
71 gtk_css_value_rgba_transition,
72 gtk_css_value_rgba_print
76 _gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba)
80 g_return_val_if_fail (rgba != NULL, NULL);
82 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_RGBA);
89 _gtk_css_rgba_value_get_rgba (const GtkCssValue *rgba)
91 g_return_val_if_fail (rgba->class == >K_CSS_VALUE_RGBA, NULL);
97 _gtk_css_rgba_value_compute_from_symbolic (GtkCssValue *rgba,
98 GtkCssValue *fallback,
99 GtkStyleContext *context,
100 gboolean for_color_property)
102 GtkSymbolicColor *symbolic;
103 GtkCssValue *resolved;
105 g_return_val_if_fail (rgba != NULL, NULL);
107 symbolic = _gtk_css_value_get_symbolic_color (rgba);
109 if (symbolic == _gtk_symbolic_color_get_current_color ())
111 /* The computed value of the ‘currentColor’ keyword is the computed
112 * value of the ‘color’ property. If the ‘currentColor’ keyword is
113 * set on the ‘color’ property itself, it is treated as ‘color: inherit’.
115 if (for_color_property)
117 GtkStyleContext *parent = gtk_style_context_get_parent (context);
120 return _gtk_css_value_ref (_gtk_style_context_peek_property (parent, "color"));
122 return _gtk_css_rgba_value_compute_from_symbolic (fallback, NULL, context, TRUE);
126 return _gtk_css_value_ref (_gtk_style_context_peek_property (context, "color"));
130 resolved = _gtk_style_context_resolve_color_value (context, symbolic);
132 if (resolved == NULL)
133 return _gtk_css_rgba_value_compute_from_symbolic (fallback, NULL, context, for_color_property);
135 g_assert (resolved->class == >K_CSS_VALUE_RGBA);