Pileus Git - ~andy/gtk/blob - gtk/gtkcssinitialvalue.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2011 Red Hat, Inc.
   3  *
   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.
   8  *
   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.
  13  *
  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/>.
  16  */
  17
  18 #include "config.h"
  19
  20 #include "gtkcssinitialvalueprivate.h"
  21
  22 #include "gtkcssarrayvalueprivate.h"
  23 #include "gtkcssnumbervalueprivate.h"
  24 #include "gtkcssstringvalueprivate.h"
  25 #include "gtkcssstylepropertyprivate.h"
  26 #include "gtkstyleproviderprivate.h"
  27
  28 struct _GtkCssValue {
  29   GTK_CSS_VALUE_BASE
  30 };
  31
  32 static void
  33 gtk_css_value_initial_free (GtkCssValue *value)
  34 {
  35   /* Can only happen if the unique value gets unreffed too often */
  36   g_assert_not_reached ();
  37 }
  38
  39 static GtkCssValue *
  40 gtk_css_value_initial_compute (GtkCssValue             *value,
  41                                guint                    property_id,
  42                                GtkStyleProviderPrivate *provider,
  43                                GtkCssComputedValues    *values,
  44                                GtkCssComputedValues    *parent_values,
  45                                GtkCssDependencies      *dependencies)
  46 {
  47   GtkSettings *settings;
  48
  49   switch (property_id)
  50     {
  51     case GTK_CSS_PROPERTY_FONT_FAMILY:
  52       settings = _gtk_style_provider_private_get_settings (provider);
  53       if (settings)
  54         {
  55           PangoFontDescription *description;
  56           char *font_name;
  57           GtkCssValue *value;
  58
  59           g_object_get (settings, "gtk-font-name", &font_name, NULL);
  60           description = pango_font_description_from_string (font_name);
  61           g_free (font_name);
  62           if (description == NULL)
  63             break;
  64
  65           if (pango_font_description_get_set_fields (description) & PANGO_FONT_MASK_FAMILY)
  66             {
  67               value = _gtk_css_array_value_new (_gtk_css_string_value_new (pango_font_description_get_family (description)));
  68               pango_font_description_free (description);
  69               return value;
  70             }
  71
  72           pango_font_description_free (description);
  73         }
  74       break;
  75
  76     default:
  77       break;
  78     }
  79
  80   return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
  81                                  property_id,
  82                                  provider,
  83                                  values,
  84                                  parent_values,
  85                                  dependencies);
  86 }
  87
  88 static gboolean
  89 gtk_css_value_initial_equal (const GtkCssValue *value1,
  90                              const GtkCssValue *value2)
  91 {
  92   return TRUE;
  93 }
  94
  95 static GtkCssValue *
  96 gtk_css_value_initial_transition (GtkCssValue *start,
  97                                   GtkCssValue *end,
  98                                   guint        property_id,
  99                                   double       progress)
 100 {
 101   return NULL;
 102 }
 103
 104 static void
 105 gtk_css_value_initial_print (const GtkCssValue *value,
 106                              GString           *string)
 107 {
 108   g_string_append (string, "initial");
 109 }
 110
 111 static const GtkCssValueClass GTK_CSS_VALUE_INITIAL = {
 112   gtk_css_value_initial_free,
 113   gtk_css_value_initial_compute,
 114   gtk_css_value_initial_equal,
 115   gtk_css_value_initial_transition,
 116   gtk_css_value_initial_print
 117 };
 118
 119 static GtkCssValue initial = { &GTK_CSS_VALUE_INITIAL, 1 };
 120
 121 GtkCssValue *
 122 _gtk_css_initial_value_new (void)
 123 {
 124   return _gtk_css_value_ref (&initial);
 125 }
 126
 127 GtkCssValue *
 128 _gtk_css_initial_value_get (void)
 129 {
 130   return &initial;
 131 }