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 "gtkcssstylepropertyprivate.h"
23 #include "gtkstylecontextprivate.h"
24 #include "gtksymboliccolorprivate.h"
32 gtk_css_value_rgba_free (GtkCssValue *value)
34 g_slice_free (GtkCssValue, value);
38 gtk_css_value_rgba_compute (GtkCssValue *value,
39 GtkStyleContext *context)
41 return _gtk_css_value_ref (value);
45 gtk_css_value_rgba_equal (const GtkCssValue *rgba1,
46 const GtkCssValue *rgba2)
48 return gdk_rgba_equal (&rgba1->rgba, &rgba2->rgba);
52 gtk_css_value_rgba_transition (GtkCssValue *start,
58 progress = CLAMP (progress, 0, 1);
59 transition.red = start->rgba.red + (end->rgba.red - start->rgba.red) * progress;
60 transition.green = start->rgba.green + (end->rgba.green - start->rgba.green) * progress;
61 transition.blue = start->rgba.blue + (end->rgba.blue - start->rgba.blue) * progress;
62 transition.alpha = start->rgba.alpha + (end->rgba.alpha - start->rgba.alpha) * progress;
64 return _gtk_css_rgba_value_new_from_rgba (&transition);
68 gtk_css_value_rgba_print (const GtkCssValue *rgba,
71 char *s = gdk_rgba_to_string (&rgba->rgba);
72 g_string_append (string, s);
76 static const GtkCssValueClass GTK_CSS_VALUE_RGBA = {
77 gtk_css_value_rgba_free,
78 gtk_css_value_rgba_compute,
79 gtk_css_value_rgba_equal,
80 gtk_css_value_rgba_transition,
81 gtk_css_value_rgba_print
85 _gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba)
89 g_return_val_if_fail (rgba != NULL, NULL);
91 value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_RGBA);
98 _gtk_css_rgba_value_get_rgba (const GtkCssValue *rgba)
100 g_return_val_if_fail (rgba->class == >K_CSS_VALUE_RGBA, NULL);
106 _gtk_css_rgba_value_compute_from_symbolic (GtkCssValue *symbolic,
107 GtkCssValue *fallback,
108 GtkStyleContext *context,
109 gboolean for_color_property)
111 GtkCssValue *resolved, *current;
113 g_return_val_if_fail (symbolic != NULL, NULL);
115 /* The computed value of the ‘currentColor’ keyword is the computed
116 * value of the ‘color’ property. If the ‘currentColor’ keyword is
117 * set on the ‘color’ property itself, it is treated as ‘color: inherit’.
119 if (for_color_property)
121 GtkStyleContext *parent = gtk_style_context_get_parent (context);
124 current = _gtk_style_context_peek_property (parent, GTK_CSS_PROPERTY_COLOR);
126 current = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
130 current = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR);
133 resolved = _gtk_style_context_resolve_color_value (context, current, symbolic);
135 if (resolved == NULL)
136 return _gtk_css_rgba_value_compute_from_symbolic (fallback, NULL, context, for_color_property);
138 g_assert (resolved->class == >K_CSS_VALUE_RGBA);