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

   1 /*
   2  * Copyright © 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 2.1 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  * Authors: Benjamin Otte <otte@gnome.org>
  18  */
  19
  20 #include "config.h"
  21
  22 #include "gtkcssshorthandpropertyprivate.h"
  23
  24 #include "gtkcssarrayvalueprivate.h"
  25 #include "gtkcssinheritvalueprivate.h"
  26 #include "gtkcssinitialvalueprivate.h"
  27 #include "gtkcssstylefuncsprivate.h"
  28 #include "gtkintl.h"
  29
  30 enum {
  31   PROP_0,
  32   PROP_SUBPROPERTIES,
  33 };
  34
  35 G_DEFINE_TYPE (GtkCssShorthandProperty, _gtk_css_shorthand_property, GTK_TYPE_STYLE_PROPERTY)
  36
  37 static void
  38 gtk_css_shorthand_property_set_property (GObject      *object,
  39                                          guint         prop_id,
  40                                          const GValue *value,
  41                                          GParamSpec   *pspec)
  42 {
  43   GtkCssShorthandProperty *property = GTK_CSS_SHORTHAND_PROPERTY (object);
  44   const char **subproperties;
  45   guint i;
  46
  47   switch (prop_id)
  48     {
  49     case PROP_SUBPROPERTIES:
  50       subproperties = g_value_get_boxed (value);
  51       g_assert (subproperties);
  52       for (i = 0; subproperties[i] != NULL; i++)
  53         {
  54           GtkStyleProperty *subproperty = _gtk_style_property_lookup (subproperties[i]);
  55           g_assert (GTK_IS_CSS_STYLE_PROPERTY (subproperty));
  56           g_ptr_array_add (property->subproperties, subproperty);
  57         }
  58       break;
  59     default:
  60       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  61       break;
  62     }
  63 }
  64
  65 static void
  66 _gtk_css_shorthand_property_assign (GtkStyleProperty   *property,
  67                                     GtkStyleProperties *props,
  68                                     GtkStateFlags       state,
  69                                     const GValue       *value)
  70 {
  71   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
  72
  73   shorthand->assign (shorthand, props, state, value);
  74 }
  75
  76 static void
  77 _gtk_css_shorthand_property_query (GtkStyleProperty   *property,
  78                                    GValue             *value,
  79                                    GtkStyleQueryFunc   query_func,
  80                                    gpointer            query_data)
  81 {
  82   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
  83
  84   return shorthand->query (shorthand, value, query_func, query_data);
  85 }
  86
  87 static GtkCssValue *
  88 gtk_css_shorthand_property_parse_value (GtkStyleProperty *property,
  89                                         GtkCssParser     *parser)
  90 {
  91   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
  92   GtkCssValue **data;
  93   GtkCssValue *result;
  94   guint i;
  95
  96   data = g_new0 (GtkCssValue *, shorthand->subproperties->len);
  97
  98   if (_gtk_css_parser_try (parser, "initial", TRUE))
  99     {
 100       /* the initial value can be explicitly specified with the
 101        * ‘initial’ keyword which all properties accept.
 102        */
 103       for (i = 0; i < shorthand->subproperties->len; i++)
 104         {
 105           data[i] = _gtk_css_initial_value_new ();
 106         }
 107     }
 108   else if (_gtk_css_parser_try (parser, "inherit", TRUE))
 109     {
 110       /* All properties accept the ‘inherit’ value which
 111        * explicitly specifies that the value will be determined
 112        * by inheritance. The ‘inherit’ value can be used to
 113        * strengthen inherited values in the cascade, and it can
 114        * also be used on properties that are not normally inherited.
 115        */
 116       for (i = 0; i < shorthand->subproperties->len; i++)
 117         {
 118           data[i] = _gtk_css_inherit_value_new ();
 119         }
 120     }
 121   else if (!shorthand->parse (shorthand, data, parser))
 122     {
 123       for (i = 0; i < shorthand->subproperties->len; i++)
 124         {
 125           if (data[i] != NULL)
 126             _gtk_css_value_unref (data[i]);
 127         }
 128       g_free (data);
 129       return NULL;
 130     }
 131
 132   /* All values that aren't set by the parse func are set to their
 133    * default values here.
 134    * XXX: Is the default always initial or can it be inherit? */
 135   for (i = 0; i < shorthand->subproperties->len; i++)
 136     {
 137       if (data[i] == NULL)
 138         data[i] = _gtk_css_initial_value_new ();
 139     }
 140
 141   result = _gtk_css_array_value_new_from_array (data, shorthand->subproperties->len);
 142   g_free (data);
 143
 144   return result;
 145 }
 146
 147 static void
 148 _gtk_css_shorthand_property_class_init (GtkCssShorthandPropertyClass *klass)
 149 {
 150   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 151   GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
 152
 153   object_class->set_property = gtk_css_shorthand_property_set_property;
 154
 155   g_object_class_install_property (object_class,
 156                                    PROP_SUBPROPERTIES,
 157                                    g_param_spec_boxed ("subproperties",
 158                                                        P_("Subproperties"),
 159                                                        P_("The list of subproperties"),
 160                                                        G_TYPE_STRV,
 161                                                        G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
 162
 163   property_class->assign = _gtk_css_shorthand_property_assign;
 164   property_class->query = _gtk_css_shorthand_property_query;
 165   property_class->parse_value = gtk_css_shorthand_property_parse_value;
 166 }
 167
 168 static void
 169 _gtk_css_shorthand_property_init (GtkCssShorthandProperty *shorthand)
 170 {
 171   shorthand->subproperties = g_ptr_array_new_with_free_func (g_object_unref);
 172 }
 173
 174 GtkCssStyleProperty *
 175 _gtk_css_shorthand_property_get_subproperty (GtkCssShorthandProperty *shorthand,
 176                                              guint                    property)
 177 {
 178   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), NULL);
 179   g_return_val_if_fail (property < shorthand->subproperties->len, NULL);
 180
 181   return g_ptr_array_index (shorthand->subproperties, property);
 182 }
 183
 184 guint
 185 _gtk_css_shorthand_property_get_n_subproperties (GtkCssShorthandProperty *shorthand)
 186 {
 187   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), 0);
 188
 189   return shorthand->subproperties->len;
 190 }
 191