134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcssrgbavalueprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkstylecontextprivate.h"
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#include "gtksymboliccolorprivate.h"
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struct _GtkCssValue {
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GTK_CSS_VALUE_BASE
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GdkRGBA rgba;
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};
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static void
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gtk_css_value_rgba_free (GtkCssValue *value)
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{
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g_slice_free (GtkCssValue, value);
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}
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static gboolean
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gtk_css_value_rgba_equal (const GtkCssValue *rgba1,
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const GtkCssValue *rgba2)
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{
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return gdk_rgba_equal (&rgba1->rgba, &rgba2->rgba);
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}
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static GtkCssValue *
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gtk_css_value_rgba_transition (GtkCssValue *start,
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GtkCssValue *end,
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double progress)
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{
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GdkRGBA transition;
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progress = CLAMP (progress, 0, 1);
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transition.red = start->rgba.red + (end->rgba.red - start->rgba.red) * progress;
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transition.green = start->rgba.green + (end->rgba.green - start->rgba.green) * progress;
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transition.blue = start->rgba.blue + (end->rgba.blue - start->rgba.blue) * progress;
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transition.alpha = start->rgba.alpha + (end->rgba.alpha - start->rgba.alpha) * progress;
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return _gtk_css_rgba_value_new_from_rgba (&transition);
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}
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static void
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gtk_css_value_rgba_print (const GtkCssValue *rgba,
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GString *string)
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{
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char *s = gdk_rgba_to_string (&rgba->rgba);
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g_string_append (string, s);
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g_free (s);
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}
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static const GtkCssValueClass GTK_CSS_VALUE_RGBA = {
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gtk_css_value_rgba_free,
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gtk_css_value_rgba_equal,
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gtk_css_value_rgba_transition,
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gtk_css_value_rgba_print
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};
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GtkCssValue *
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_gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba)
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{
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GtkCssValue *value;
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g_return_val_if_fail (rgba != NULL, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_RGBA);
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value->rgba = *rgba;
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return value;
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}
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const GdkRGBA *
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_gtk_css_rgba_value_get_rgba (const GtkCssValue *rgba)
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{
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g_return_val_if_fail (rgba->class == >K_CSS_VALUE_RGBA, NULL);
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return &rgba->rgba;
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}
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GtkCssValue *
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_gtk_css_rgba_value_compute_from_symbolic (GtkCssValue *symbolic,
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GtkCssValue *fallback,
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GtkStyleContext *context,
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gboolean for_color_property)
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{
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GtkCssValue *resolved, *current;
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g_return_val_if_fail (symbolic != NULL, NULL);
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/* The computed value of the ‘currentColor’ keyword is the computed
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* value of the ‘color’ property. If the ‘currentColor’ keyword is
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* set on the ‘color’ property itself, it is treated as ‘color: inherit’.
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*/
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if (for_color_property)
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{
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GtkStyleContext *parent = gtk_style_context_get_parent (context);
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if (parent)
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current = _gtk_style_context_peek_property (parent, GTK_CSS_PROPERTY_COLOR);
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else
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current = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
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}
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else
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{
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current = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_COLOR);
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}
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resolved = _gtk_style_context_resolve_color_value (context, current, symbolic);
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if (resolved == NULL)
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return _gtk_css_rgba_value_compute_from_symbolic (fallback, NULL, context, for_color_property);
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g_assert (resolved->class == >K_CSS_VALUE_RGBA);
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return resolved;
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}
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