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, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  * Authors: Benjamin Otte <otte@gnome.org>
  19  */
  20
  21 #include "config.h"
  22
  23 #include "gtkcssshorthandpropertyprivate.h"
  24
  25 #include "gtkcssstylefuncsprivate.h"
  26 #include "gtkcsstypesprivate.h"
  27 #include "gtkintl.h"
  28 #include "gtkprivatetypebuiltins.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   shorthand->query (shorthand, value, query_func, query_data);
  85 }
  86
  87 static gboolean
  88 gtk_css_shorthand_property_parse_value (GtkStyleProperty *property,
  89                                         GValue           *value,
  90                                         GtkCssParser     *parser,
  91                                         GFile            *base)
  92 {
  93   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
  94   GArray *array;
  95   guint i;
  96
  97   array = g_array_new (FALSE, TRUE, sizeof (GValue));
  98   g_array_set_clear_func (array, (GDestroyNotify) g_value_unset);
  99   g_array_set_size (array, shorthand->subproperties->len);
 100
 101   if (_gtk_css_parser_try (parser, "initial", TRUE))
 102     {
 103       /* the initial value can be explicitly specified with the
 104        * ‘initial’ keyword which all properties accept.
 105        */
 106       for (i = 0; i < shorthand->subproperties->len; i++)
 107         {
 108           GValue *val = &g_array_index (array, GValue, i);
 109           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 110           g_value_set_enum (val, GTK_CSS_INITIAL);
 111         }
 112     }
 113   else if (_gtk_css_parser_try (parser, "inherit", TRUE))
 114     {
 115       /* All properties accept the ‘inherit’ value which
 116        * explicitly specifies that the value will be determined
 117        * by inheritance. The ‘inherit’ value can be used to
 118        * strengthen inherited values in the cascade, and it can
 119        * also be used on properties that are not normally inherited.
 120        */
 121       for (i = 0; i < shorthand->subproperties->len; i++)
 122         {
 123           GValue *val = &g_array_index (array, GValue, i);
 124           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 125           g_value_set_enum (val, GTK_CSS_INHERIT);
 126         }
 127     }
 128   else if (!shorthand->parse (shorthand, (GValue *) array->data, parser, base))
 129     {
 130       g_array_free (array, TRUE);
 131       return FALSE;
 132     }
 133
 134   /* All values that aren't set by the parse func are set to their
 135    * default values here.
 136    * XXX: Is the default always initial or can it be inherit? */
 137   for (i = 0; i < shorthand->subproperties->len; i++)
 138     {
 139       GValue *val = &g_array_index (array, GValue, i);
 140       if (G_IS_VALUE (val))
 141         continue;
 142       g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 143       g_value_set_enum (val, GTK_CSS_INITIAL);
 144     }
 145
 146   g_value_init (value, G_TYPE_ARRAY);
 147   g_value_take_boxed (value, array);
 148   return TRUE;
 149 }
 150
 151 static void
 152 _gtk_css_shorthand_property_class_init (GtkCssShorthandPropertyClass *klass)
 153 {
 154   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 155   GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
 156
 157   object_class->set_property = gtk_css_shorthand_property_set_property;
 158
 159   g_object_class_install_property (object_class,
 160                                    PROP_SUBPROPERTIES,
 161                                    g_param_spec_boxed ("subproperties",
 162                                                        P_("Subproperties"),
 163                                                        P_("The list of subproperties"),
 164                                                        G_TYPE_STRV,
 165                                                        G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
 166
 167   property_class->assign = _gtk_css_shorthand_property_assign;
 168   property_class->query = _gtk_css_shorthand_property_query;
 169   property_class->parse_value = gtk_css_shorthand_property_parse_value;
 170 }
 171
 172 static void
 173 _gtk_css_shorthand_property_init (GtkCssShorthandProperty *shorthand)
 174 {
 175   shorthand->subproperties = g_ptr_array_new_with_free_func (g_object_unref);
 176 }
 177
 178 GtkCssStyleProperty *
 179 _gtk_css_shorthand_property_get_subproperty (GtkCssShorthandProperty *shorthand,
 180                                              guint                    property)
 181 {
 182   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), NULL);
 183   g_return_val_if_fail (property < shorthand->subproperties->len, NULL);
 184
 185   return g_ptr_array_index (shorthand->subproperties, property);
 186 }
 187
 188 guint
 189 _gtk_css_shorthand_property_get_n_subproperties (GtkCssShorthandProperty *shorthand)
 190 {
 191   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), 0);
 192
 193   return shorthand->subproperties->len;
 194 }
 195