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 void
  88 gtk_css_shorthand_property_unset_value (gpointer value)
  89 {
  90   if (G_IS_VALUE (value))
  91     g_value_unset (value);
  92 }
  93
  94 static gboolean
  95 gtk_css_shorthand_property_parse_value (GtkStyleProperty *property,
  96                                         GValue           *value,
  97                                         GtkCssParser     *parser,
  98                                         GFile            *base)
  99 {
 100   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
 101   GArray *array;
 102   guint i;
 103
 104   array = g_array_new (FALSE, TRUE, sizeof (GValue));
 105   g_array_set_clear_func (array, gtk_css_shorthand_property_unset_value);
 106   g_array_set_size (array, shorthand->subproperties->len);
 107
 108   if (_gtk_css_parser_try (parser, "initial", TRUE))
 109     {
 110       /* the initial value can be explicitly specified with the
 111        * ‘initial’ keyword which all properties accept.
 112        */
 113       for (i = 0; i < shorthand->subproperties->len; i++)
 114         {
 115           GValue *val = &g_array_index (array, GValue, i);
 116           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 117           g_value_set_enum (val, GTK_CSS_INITIAL);
 118         }
 119     }
 120   else if (_gtk_css_parser_try (parser, "inherit", TRUE))
 121     {
 122       /* All properties accept the ‘inherit’ value which
 123        * explicitly specifies that the value will be determined
 124        * by inheritance. The ‘inherit’ value can be used to
 125        * strengthen inherited values in the cascade, and it can
 126        * also be used on properties that are not normally inherited.
 127        */
 128       for (i = 0; i < shorthand->subproperties->len; i++)
 129         {
 130           GValue *val = &g_array_index (array, GValue, i);
 131           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 132           g_value_set_enum (val, GTK_CSS_INHERIT);
 133         }
 134     }
 135   else if (!shorthand->parse (shorthand, (GValue *) array->data, parser, base))
 136     {
 137       g_array_free (array, TRUE);
 138       return FALSE;
 139     }
 140
 141   /* All values that aren't set by the parse func are set to their
 142    * default values here.
 143    * XXX: Is the default always initial or can it be inherit? */
 144   for (i = 0; i < shorthand->subproperties->len; i++)
 145     {
 146       GValue *val = &g_array_index (array, GValue, i);
 147       if (G_IS_VALUE (val))
 148         continue;
 149       g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 150       g_value_set_enum (val, GTK_CSS_INITIAL);
 151     }
 152
 153   g_value_init (value, G_TYPE_ARRAY);
 154   g_value_take_boxed (value, array);
 155   return TRUE;
 156 }
 157
 158 static void
 159 _gtk_css_shorthand_property_class_init (GtkCssShorthandPropertyClass *klass)
 160 {
 161   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 162   GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
 163
 164   object_class->set_property = gtk_css_shorthand_property_set_property;
 165
 166   g_object_class_install_property (object_class,
 167                                    PROP_SUBPROPERTIES,
 168                                    g_param_spec_boxed ("subproperties",
 169                                                        P_("Subproperties"),
 170                                                        P_("The list of subproperties"),
 171                                                        G_TYPE_STRV,
 172                                                        G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
 173
 174   property_class->assign = _gtk_css_shorthand_property_assign;
 175   property_class->query = _gtk_css_shorthand_property_query;
 176   property_class->parse_value = gtk_css_shorthand_property_parse_value;
 177 }
 178
 179 static void
 180 _gtk_css_shorthand_property_init (GtkCssShorthandProperty *shorthand)
 181 {
 182   shorthand->subproperties = g_ptr_array_new_with_free_func (g_object_unref);
 183 }
 184
 185 GtkCssStyleProperty *
 186 _gtk_css_shorthand_property_get_subproperty (GtkCssShorthandProperty *shorthand,
 187                                              guint                    property)
 188 {
 189   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), NULL);
 190   g_return_val_if_fail (property < shorthand->subproperties->len, NULL);
 191
 192   return g_ptr_array_index (shorthand->subproperties, property);
 193 }
 194
 195 guint
 196 _gtk_css_shorthand_property_get_n_subproperties (GtkCssShorthandProperty *shorthand)
 197 {
 198   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), 0);
 199
 200   return shorthand->subproperties->len;
 201 }
 202