Pileus Git - ~andy/gtk/blob - gtk/gtkcsscornervalue.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 "gtkcsscornervalueprivate.h"
  21
  22 #include "gtkcssnumbervalueprivate.h"
  23
  24 struct _GtkCssValue {
  25   GTK_CSS_VALUE_BASE
  26   GtkCssValue *x;
  27   GtkCssValue *y;
  28 };
  29
  30 static void
  31 gtk_css_value_corner_free (GtkCssValue *value)
  32 {
  33   _gtk_css_value_unref (value->x);
  34   _gtk_css_value_unref (value->y);
  35
  36   g_slice_free (GtkCssValue, value);
  37 }
  38
  39 static GtkCssValue *
  40 gtk_css_value_corner_compute (GtkCssValue        *corner,
  41                               guint               property_id,
  42                               GtkStyleContext    *context,
  43                               GtkCssDependencies *dependencies)
  44 {
  45   GtkCssValue *x, *y;
  46   GtkCssDependencies x_deps, y_deps;
  47
  48   x = _gtk_css_value_compute (corner->x, property_id, context, &x_deps);
  49   y = _gtk_css_value_compute (corner->y, property_id, context, &y_deps);
  50   *dependencies = _gtk_css_dependencies_union (x_deps, y_deps);
  51   if (x == corner->x && y == corner->y)
  52     {
  53       _gtk_css_value_unref (x);
  54       _gtk_css_value_unref (y);
  55       return _gtk_css_value_ref (corner);
  56     }
  57
  58   return _gtk_css_corner_value_new (x, y);
  59 }
  60
  61 static gboolean
  62 gtk_css_value_corner_equal (const GtkCssValue *corner1,
  63                             const GtkCssValue *corner2)
  64 {
  65   return _gtk_css_value_equal (corner1->x, corner2->x)
  66       && _gtk_css_value_equal (corner1->y, corner2->y);
  67 }
  68
  69 static GtkCssValue *
  70 gtk_css_value_corner_transition (GtkCssValue *start,
  71                                 GtkCssValue *end,
  72                                 double       progress)
  73 {
  74   GtkCssValue *x, *y;
  75
  76   x = _gtk_css_value_transition (start->x, end->x, progress);
  77   if (x == NULL)
  78     return NULL;
  79   y = _gtk_css_value_transition (start->y, end->y, progress);
  80   if (y == NULL)
  81     {
  82       _gtk_css_value_unref (x);
  83       return NULL;
  84     }
  85
  86   return _gtk_css_corner_value_new (x, y);
  87 }
  88
  89 static void
  90 gtk_css_value_corner_print (const GtkCssValue *corner,
  91                            GString           *string)
  92 {
  93   _gtk_css_value_print (corner->x, string);
  94   if (!_gtk_css_value_equal (corner->x, corner->y))
  95     {
  96       g_string_append_c (string, ' ');
  97       _gtk_css_value_print (corner->y, string);
  98     }
  99 }
 100
 101 static const GtkCssValueClass GTK_CSS_VALUE_CORNER = {
 102   gtk_css_value_corner_free,
 103   gtk_css_value_corner_compute,
 104   gtk_css_value_corner_equal,
 105   gtk_css_value_corner_transition,
 106   gtk_css_value_corner_print
 107 };
 108
 109 GtkCssValue *
 110 _gtk_css_corner_value_new (GtkCssValue *x,
 111                            GtkCssValue *y)
 112 {
 113   GtkCssValue *result;
 114
 115   result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_CORNER);
 116   result->x = x;
 117   result->y = y;
 118
 119   return result;
 120 }
 121
 122 GtkCssValue *
 123 _gtk_css_corner_value_parse (GtkCssParser *parser)
 124 {
 125   GtkCssValue *x, *y;
 126
 127   x = _gtk_css_number_value_parse (parser,
 128                                    GTK_CSS_POSITIVE_ONLY
 129                                    | GTK_CSS_PARSE_PERCENT
 130                                    | GTK_CSS_NUMBER_AS_PIXELS
 131                                    | GTK_CSS_PARSE_LENGTH);
 132   if (x == NULL)
 133     return NULL;
 134
 135   if (!_gtk_css_parser_has_number (parser))
 136     y = _gtk_css_value_ref (x);
 137   else
 138     {
 139       y = _gtk_css_number_value_parse (parser,
 140                                        GTK_CSS_POSITIVE_ONLY
 141                                        | GTK_CSS_PARSE_PERCENT
 142                                        | GTK_CSS_NUMBER_AS_PIXELS
 143                                        | GTK_CSS_PARSE_LENGTH);
 144       if (y == NULL)
 145         {
 146           _gtk_css_value_unref (x);
 147           return NULL;
 148         }
 149     }
 150
 151   return _gtk_css_corner_value_new (x, y);
 152 }
 153
 154 double
 155 _gtk_css_corner_value_get_x (const GtkCssValue *corner,
 156                              double             one_hundred_percent)
 157 {
 158   g_return_val_if_fail (corner != NULL, 0.0);
 159   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 160
 161   return _gtk_css_number_value_get (corner->x, one_hundred_percent);
 162 }
 163
 164 double
 165 _gtk_css_corner_value_get_y (const GtkCssValue *corner,
 166                              double             one_hundred_percent)
 167 {
 168   g_return_val_if_fail (corner != NULL, 0.0);
 169   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 170
 171   return _gtk_css_number_value_get (corner->y, one_hundred_percent);
 172 }
 173