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 {
  44   GtkCssValue *x, *y;
  45
  46   x = _gtk_css_value_compute (corner->x, property_id, context);
  47   y = _gtk_css_value_compute (corner->y, property_id, context);
  48   if (x == corner->x && y == corner->y)
  49     {
  50       _gtk_css_value_unref (x);
  51       _gtk_css_value_unref (y);
  52       return _gtk_css_value_ref (corner);
  53     }
  54
  55   return _gtk_css_corner_value_new (x, y);
  56 }
  57
  58 static gboolean
  59 gtk_css_value_corner_equal (const GtkCssValue *corner1,
  60                             const GtkCssValue *corner2)
  61 {
  62   return _gtk_css_value_equal (corner1->x, corner2->x)
  63       && _gtk_css_value_equal (corner1->y, corner2->y);
  64 }
  65
  66 static GtkCssValue *
  67 gtk_css_value_corner_transition (GtkCssValue *start,
  68                                 GtkCssValue *end,
  69                                 double       progress)
  70 {
  71   GtkCssValue *x, *y;
  72
  73   x = _gtk_css_value_transition (start->x, end->x, progress);
  74   if (x == NULL)
  75     return NULL;
  76   y = _gtk_css_value_transition (start->y, end->y, progress);
  77   if (y == NULL)
  78     {
  79       _gtk_css_value_unref (x);
  80       return NULL;
  81     }
  82
  83   return _gtk_css_corner_value_new (x, y);
  84 }
  85
  86 static void
  87 gtk_css_value_corner_print (const GtkCssValue *corner,
  88                            GString           *string)
  89 {
  90   _gtk_css_value_print (corner->x, string);
  91   if (!_gtk_css_value_equal (corner->x, corner->y))
  92     {
  93       g_string_append_c (string, ' ');
  94       _gtk_css_value_print (corner->y, string);
  95     }
  96 }
  97
  98 static const GtkCssValueClass GTK_CSS_VALUE_CORNER = {
  99   gtk_css_value_corner_free,
 100   gtk_css_value_corner_compute,
 101   gtk_css_value_corner_equal,
 102   gtk_css_value_corner_transition,
 103   gtk_css_value_corner_print
 104 };
 105
 106 GtkCssValue *
 107 _gtk_css_corner_value_new (GtkCssValue *x,
 108                            GtkCssValue *y)
 109 {
 110   GtkCssValue *result;
 111
 112   result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_CORNER);
 113   result->x = x;
 114   result->y = y;
 115
 116   return result;
 117 }
 118
 119 GtkCssValue *
 120 _gtk_css_corner_value_parse (GtkCssParser *parser)
 121 {
 122   GtkCssValue *x, *y;
 123
 124   x = _gtk_css_number_value_parse (parser,
 125                                    GTK_CSS_POSITIVE_ONLY
 126                                    | GTK_CSS_PARSE_PERCENT
 127                                    | GTK_CSS_NUMBER_AS_PIXELS
 128                                    | GTK_CSS_PARSE_LENGTH);
 129   if (x == NULL)
 130     return NULL;
 131
 132   if (!_gtk_css_parser_has_number (parser))
 133     y = _gtk_css_value_ref (x);
 134   else
 135     {
 136       y = _gtk_css_number_value_parse (parser,
 137                                        GTK_CSS_POSITIVE_ONLY
 138                                        | GTK_CSS_PARSE_PERCENT
 139                                        | GTK_CSS_NUMBER_AS_PIXELS
 140                                        | GTK_CSS_PARSE_LENGTH);
 141       if (y == NULL)
 142         {
 143           _gtk_css_value_unref (x);
 144           return NULL;
 145         }
 146     }
 147
 148   return _gtk_css_corner_value_new (x, y);
 149 }
 150
 151 double
 152 _gtk_css_corner_value_get_x (const GtkCssValue *corner,
 153                              double             one_hundred_percent)
 154 {
 155   g_return_val_if_fail (corner != NULL, 0.0);
 156   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 157
 158   return _gtk_css_number_value_get (corner->x, one_hundred_percent);
 159 }
 160
 161 double
 162 _gtk_css_corner_value_get_y (const GtkCssValue *corner,
 163                              double             one_hundred_percent)
 164 {
 165   g_return_val_if_fail (corner != NULL, 0.0);
 166   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 167
 168   return _gtk_css_number_value_get (corner->y, one_hundred_percent);
 169 }
 170