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 gboolean
  40 gtk_css_value_corner_equal (const GtkCssValue *corner1,
  41                             const GtkCssValue *corner2)
  42 {
  43   return _gtk_css_value_equal (corner1->x, corner2->x)
  44       && _gtk_css_value_equal (corner1->y, corner2->y);
  45 }
  46
  47 static GtkCssValue *
  48 gtk_css_value_corner_transition (GtkCssValue *start,
  49                                 GtkCssValue *end,
  50                                 double       progress)
  51 {
  52   GtkCssValue *x, *y;
  53
  54   x = _gtk_css_value_transition (start->x, end->x, progress);
  55   if (x == NULL)
  56     return NULL;
  57   y = _gtk_css_value_transition (start->y, end->y, progress);
  58   if (y == NULL)
  59     {
  60       _gtk_css_value_unref (x);
  61       return NULL;
  62     }
  63
  64   return _gtk_css_corner_value_new (x, y);
  65 }
  66
  67 static void
  68 gtk_css_value_corner_print (const GtkCssValue *corner,
  69                            GString           *string)
  70 {
  71   _gtk_css_value_print (corner->x, string);
  72   if (!_gtk_css_value_equal (corner->x, corner->y))
  73     {
  74       g_string_append_c (string, ' ');
  75       _gtk_css_value_print (corner->y, string);
  76     }
  77 }
  78
  79 static const GtkCssValueClass GTK_CSS_VALUE_CORNER = {
  80   gtk_css_value_corner_free,
  81   gtk_css_value_corner_equal,
  82   gtk_css_value_corner_transition,
  83   gtk_css_value_corner_print
  84 };
  85
  86 GtkCssValue *
  87 _gtk_css_corner_value_new (GtkCssValue *x,
  88                            GtkCssValue *y)
  89 {
  90   GtkCssValue *result;
  91
  92   result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_CORNER);
  93   result->x = x;
  94   result->y = y;
  95
  96   return result;
  97 }
  98
  99 GtkCssValue *
 100 _gtk_css_corner_value_parse (GtkCssParser *parser)
 101 {
 102   GtkCssValue *x, *y;
 103
 104   x = _gtk_css_number_value_parse (parser,
 105                                    GTK_CSS_POSITIVE_ONLY
 106                                    | GTK_CSS_PARSE_PERCENT
 107                                    | GTK_CSS_NUMBER_AS_PIXELS
 108                                    | GTK_CSS_PARSE_LENGTH);
 109   if (x == NULL)
 110     return NULL;
 111
 112   if (!_gtk_css_parser_has_number (parser))
 113     y = _gtk_css_value_ref (x);
 114   else
 115     {
 116       y = _gtk_css_number_value_parse (parser,
 117                                        GTK_CSS_POSITIVE_ONLY
 118                                        | GTK_CSS_PARSE_PERCENT
 119                                        | GTK_CSS_NUMBER_AS_PIXELS
 120                                        | GTK_CSS_PARSE_LENGTH);
 121       if (y == NULL)
 122         {
 123           _gtk_css_value_unref (x);
 124           return NULL;
 125         }
 126     }
 127
 128   return _gtk_css_corner_value_new (x, y);
 129 }
 130
 131 double
 132 _gtk_css_corner_value_get_x (const GtkCssValue *corner,
 133                              double             one_hundred_percent)
 134 {
 135   g_return_val_if_fail (corner != NULL, 0.0);
 136   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 137
 138   return _gtk_css_number_value_get (corner->x, one_hundred_percent);
 139 }
 140
 141 double
 142 _gtk_css_corner_value_get_y (const GtkCssValue *corner,
 143                              double             one_hundred_percent)
 144 {
 145   g_return_val_if_fail (corner != NULL, 0.0);
 146   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 147
 148   return _gtk_css_number_value_get (corner->y, one_hundred_percent);
 149 }
 150
 151 GtkCssValue *
 152 _gtk_css_corner_value_compute (GtkCssValue     *corner,
 153                                GtkStyleContext *context)
 154 {
 155   GtkCssValue *x, *y;
 156
 157   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, NULL);
 158
 159   x = _gtk_css_number_value_compute (corner->x, context);
 160   y = _gtk_css_number_value_compute (corner->y, context);
 161   if (x == corner->x && y == corner->y)
 162     {
 163       _gtk_css_value_unref (x);
 164       _gtk_css_value_unref (y);
 165       return _gtk_css_value_ref (corner);
 166     }
 167
 168   return _gtk_css_corner_value_new (x, y);
 169 }
 170