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 "gtkcssstylefuncsprivate.h"
  25 #include "gtkcsstypesprivate.h"
  26 #include "gtkintl.h"
  27 #include "gtkprivatetypebuiltins.h"
  28
  29 enum {
  30   PROP_0,
  31   PROP_SUBPROPERTIES,
  32 };
  33
  34 G_DEFINE_TYPE (GtkCssShorthandProperty, _gtk_css_shorthand_property, GTK_TYPE_STYLE_PROPERTY)
  35
  36 static void
  37 gtk_css_shorthand_property_set_property (GObject      *object,
  38                                          guint         prop_id,
  39                                          const GValue *value,
  40                                          GParamSpec   *pspec)
  41 {
  42   GtkCssShorthandProperty *property = GTK_CSS_SHORTHAND_PROPERTY (object);
  43   const char **subproperties;
  44   guint i;
  45
  46   switch (prop_id)
  47     {
  48     case PROP_SUBPROPERTIES:
  49       subproperties = g_value_get_boxed (value);
  50       g_assert (subproperties);
  51       for (i = 0; subproperties[i] != NULL; i++)
  52         {
  53           GtkStyleProperty *subproperty = _gtk_style_property_lookup (subproperties[i]);
  54           g_assert (GTK_IS_CSS_STYLE_PROPERTY (subproperty));
  55           g_ptr_array_add (property->subproperties, subproperty);
  56         }
  57       break;
  58     default:
  59       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  60       break;
  61     }
  62 }
  63
  64 static void
  65 _gtk_css_shorthand_property_assign (GtkStyleProperty   *property,
  66                                     GtkStyleProperties *props,
  67                                     GtkStateFlags       state,
  68                                     const GValue       *value)
  69 {
  70   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
  71
  72   shorthand->assign (shorthand, props, state, value);
  73 }
  74
  75 static void
  76 _gtk_css_shorthand_property_query (GtkStyleProperty   *property,
  77                                    GValue             *value,
  78                                    GtkStyleQueryFunc   query_func,
  79                                    gpointer            query_data)
  80 {
  81   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
  82
  83   shorthand->query (shorthand, value, query_func, query_data);
  84 }
  85
  86 static void
  87 gtk_css_shorthand_property_unset_value (gpointer value)
  88 {
  89   if (G_IS_VALUE (value))
  90     g_value_unset (value);
  91 }
  92
  93 static gboolean
  94 gtk_css_shorthand_property_parse_value (GtkStyleProperty *property,
  95                                         GValue           *value,
  96                                         GtkCssParser     *parser,
  97                                         GFile            *base)
  98 {
  99   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
 100   GArray *array;
 101   guint i;
 102
 103   array = g_array_new (FALSE, TRUE, sizeof (GValue));
 104   g_array_set_clear_func (array, gtk_css_shorthand_property_unset_value);
 105   g_array_set_size (array, shorthand->subproperties->len);
 106
 107   if (_gtk_css_parser_try (parser, "initial", TRUE))
 108     {
 109       /* the initial value can be explicitly specified with the
 110        * ‘initial’ keyword which all properties accept.
 111        */
 112       for (i = 0; i < shorthand->subproperties->len; i++)
 113         {
 114           GValue *val = &g_array_index (array, GValue, i);
 115           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 116           g_value_set_enum (val, GTK_CSS_INITIAL);
 117         }
 118     }
 119   else if (_gtk_css_parser_try (parser, "inherit", TRUE))
 120     {
 121       /* All properties accept the ‘inherit’ value which
 122        * explicitly specifies that the value will be determined
 123        * by inheritance. The ‘inherit’ value can be used to
 124        * strengthen inherited values in the cascade, and it can
 125        * also be used on properties that are not normally inherited.
 126        */
 127       for (i = 0; i < shorthand->subproperties->len; i++)
 128         {
 129           GValue *val = &g_array_index (array, GValue, i);
 130           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 131           g_value_set_enum (val, GTK_CSS_INHERIT);
 132         }
 133     }
 134   else if (!shorthand->parse (shorthand, (GValue *) array->data, parser, base))
 135     {
 136       g_array_free (array, TRUE);
 137       return FALSE;
 138     }
 139
 140   /* All values that aren't set by the parse func are set to their
 141    * default values here.
 142    * XXX: Is the default always initial or can it be inherit? */
 143   for (i = 0; i < shorthand->subproperties->len; i++)
 144     {
 145       GValue *val = &g_array_index (array, GValue, i);
 146       if (G_IS_VALUE (val))
 147         continue;
 148       g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 149       g_value_set_enum (val, GTK_CSS_INITIAL);
 150     }
 151
 152   g_value_init (value, G_TYPE_ARRAY);
 153   g_value_take_boxed (value, array);
 154   return TRUE;
 155 }
 156
 157 static void
 158 _gtk_css_shorthand_property_class_init (GtkCssShorthandPropertyClass *klass)
 159 {
 160   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 161   GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
 162
 163   object_class->set_property = gtk_css_shorthand_property_set_property;
 164
 165   g_object_class_install_property (object_class,
 166                                    PROP_SUBPROPERTIES,
 167                                    g_param_spec_boxed ("subproperties",
 168                                                        P_("Subproperties"),
 169                                                        P_("The list of subproperties"),
 170                                                        G_TYPE_STRV,
 171                                                        G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
 172
 173   property_class->assign = _gtk_css_shorthand_property_assign;
 174   property_class->query = _gtk_css_shorthand_property_query;
 175   property_class->parse_value = gtk_css_shorthand_property_parse_value;
 176 }
 177
 178 static void
 179 _gtk_css_shorthand_property_init (GtkCssShorthandProperty *shorthand)
 180 {
 181   shorthand->subproperties = g_ptr_array_new_with_free_func (g_object_unref);
 182 }
 183
 184 GtkCssStyleProperty *
 185 _gtk_css_shorthand_property_get_subproperty (GtkCssShorthandProperty *shorthand,
 186                                              guint                    property)
 187 {
 188   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), NULL);
 189   g_return_val_if_fail (property < shorthand->subproperties->len, NULL);
 190
 191   return g_ptr_array_index (shorthand->subproperties, property);
 192 }
 193
 194 guint
 195 _gtk_css_shorthand_property_get_n_subproperties (GtkCssShorthandProperty *shorthand)
 196 {
 197   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), 0);
 198
 199   return shorthand->subproperties->len;
 200 }
 201