gtkcssinitialvalue.c 3.62 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
/* GTK - The GIMP Toolkit
 * Copyright (C) 2011 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include "gtkcssinitialvalueprivate.h"

22 23 24
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcssstringvalueprivate.h"
25
#include "gtkcssstylepropertyprivate.h"
26
#include "gtksettingsprivate.h"
27
#include "gtkstyleproviderprivate.h"
28

29 30 31 32 33 34 35 36 37 38 39
struct _GtkCssValue {
  GTK_CSS_VALUE_BASE
};

static void
gtk_css_value_initial_free (GtkCssValue *value)
{
  /* Can only happen if the unique value gets unreffed too often */
  g_assert_not_reached ();
}

40
static GtkCssValue *
41 42 43
gtk_css_value_initial_compute (GtkCssValue             *value,
                               guint                    property_id,
                               GtkStyleProviderPrivate *provider,
44
                               GtkCssStyle             *style,
45
                               GtkCssStyle             *parent_style)
46
{
47 48 49 50
  GtkSettings *settings;

  switch (property_id)
    {
51 52 53 54 55 56 57 58 59 60 61 62
    case GTK_CSS_PROPERTY_DPI:
      settings = _gtk_style_provider_private_get_settings (provider);
      if (settings)
        {
          GdkScreen *screen = _gtk_settings_get_screen (settings);
          double resolution = gdk_screen_get_resolution (screen);

          if (resolution > 0.0)
            return _gtk_css_number_value_new (resolution, GTK_CSS_NUMBER);
        }
      break;

63 64
    case GTK_CSS_PROPERTY_FONT_FAMILY:
      settings = _gtk_style_provider_private_get_settings (provider);
65 66
      if (settings && gtk_settings_get_font_family (settings) != NULL)
        return _gtk_css_array_value_new (_gtk_css_string_value_new (gtk_settings_get_font_family (settings)));
67 68 69 70 71 72
      break;

    default:
      break;
    }

73 74
  return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
                                 property_id,
75
                                 provider,
76
                                 style,
77
                                 parent_style);
78 79
}

80 81 82 83 84 85 86
static gboolean
gtk_css_value_initial_equal (const GtkCssValue *value1,
                             const GtkCssValue *value2)
{
  return TRUE;
}

87 88 89
static GtkCssValue *
gtk_css_value_initial_transition (GtkCssValue *start,
                                  GtkCssValue *end,
90
                                  guint        property_id,
91 92 93 94 95
                                  double       progress)
{
  return NULL;
}

96 97 98 99 100 101 102 103 104
static void
gtk_css_value_initial_print (const GtkCssValue *value,
                             GString           *string)
{
  g_string_append (string, "initial");
}

static const GtkCssValueClass GTK_CSS_VALUE_INITIAL = {
  gtk_css_value_initial_free,
105
  gtk_css_value_initial_compute,
106
  gtk_css_value_initial_equal,
107
  gtk_css_value_initial_transition,
108 109 110 111 112 113 114 115 116 117
  gtk_css_value_initial_print
};

static GtkCssValue initial = { &GTK_CSS_VALUE_INITIAL, 1 };

GtkCssValue *
_gtk_css_initial_value_new (void)
{
  return _gtk_css_value_ref (&initial);
}
118 119 120 121 122 123

GtkCssValue *
_gtk_css_initial_value_get (void)
{
  return &initial;
}