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                               GtkStyleProviderPrivate *provider,
  43                               GtkCssComputedValues    *values,
  44                               GtkCssComputedValues    *parent_values,
  45                               GtkCssDependencies      *dependencies)
  46 {
  47   GtkCssValue *x, *y;
  48   GtkCssDependencies x_deps, y_deps;
  49
  50   x = _gtk_css_value_compute (corner->x, property_id, provider, values, parent_values, &x_deps);
  51   y = _gtk_css_value_compute (corner->y, property_id, provider, values, parent_values, &y_deps);
  52   *dependencies = _gtk_css_dependencies_union (x_deps, y_deps);
  53   if (x == corner->x && y == corner->y)
  54     {
  55       _gtk_css_value_unref (x);
  56       _gtk_css_value_unref (y);
  57       return _gtk_css_value_ref (corner);
  58     }
  59
  60   return _gtk_css_corner_value_new (x, y);
  61 }
  62
  63 static gboolean
  64 gtk_css_value_corner_equal (const GtkCssValue *corner1,
  65                             const GtkCssValue *corner2)
  66 {
  67   return _gtk_css_value_equal (corner1->x, corner2->x)
  68       && _gtk_css_value_equal (corner1->y, corner2->y);
  69 }
  70
  71 static GtkCssValue *
  72 gtk_css_value_corner_transition (GtkCssValue *start,
  73                                  GtkCssValue *end,
  74                                  guint        property_id,
  75                                  double       progress)
  76 {
  77   GtkCssValue *x, *y;
  78
  79   x = _gtk_css_value_transition (start->x, end->x, property_id, progress);
  80   if (x == NULL)
  81     return NULL;
  82   y = _gtk_css_value_transition (start->y, end->y, property_id, progress);
  83   if (y == NULL)
  84     {
  85       _gtk_css_value_unref (x);
  86       return NULL;
  87     }
  88
  89   return _gtk_css_corner_value_new (x, y);
  90 }
  91
  92 static void
  93 gtk_css_value_corner_print (const GtkCssValue *corner,
  94                            GString           *string)
  95 {
  96   _gtk_css_value_print (corner->x, string);
  97   if (!_gtk_css_value_equal (corner->x, corner->y))
  98     {
  99       g_string_append_c (string, ' ');
 100       _gtk_css_value_print (corner->y, string);
 101     }
 102 }
 103
 104 static const GtkCssValueClass GTK_CSS_VALUE_CORNER = {
 105   gtk_css_value_corner_free,
 106   gtk_css_value_corner_compute,
 107   gtk_css_value_corner_equal,
 108   gtk_css_value_corner_transition,
 109   gtk_css_value_corner_print
 110 };
 111
 112 GtkCssValue *
 113 _gtk_css_corner_value_new (GtkCssValue *x,
 114                            GtkCssValue *y)
 115 {
 116   GtkCssValue *result;
 117
 118   result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_CORNER);
 119   result->x = x;
 120   result->y = y;
 121
 122   return result;
 123 }
 124
 125 GtkCssValue *
 126 _gtk_css_corner_value_parse (GtkCssParser *parser)
 127 {
 128   GtkCssValue *x, *y;
 129
 130   x = _gtk_css_number_value_parse (parser,
 131                                    GTK_CSS_POSITIVE_ONLY
 132                                    | GTK_CSS_PARSE_PERCENT
 133                                    | GTK_CSS_NUMBER_AS_PIXELS
 134                                    | GTK_CSS_PARSE_LENGTH);
 135   if (x == NULL)
 136     return NULL;
 137
 138   if (!_gtk_css_parser_has_number (parser))
 139     y = _gtk_css_value_ref (x);
 140   else
 141     {
 142       y = _gtk_css_number_value_parse (parser,
 143                                        GTK_CSS_POSITIVE_ONLY
 144                                        | GTK_CSS_PARSE_PERCENT
 145                                        | GTK_CSS_NUMBER_AS_PIXELS
 146                                        | GTK_CSS_PARSE_LENGTH);
 147       if (y == NULL)
 148         {
 149           _gtk_css_value_unref (x);
 150           return NULL;
 151         }
 152     }
 153
 154   return _gtk_css_corner_value_new (x, y);
 155 }
 156
 157 double
 158 _gtk_css_corner_value_get_x (const GtkCssValue *corner,
 159                              double             one_hundred_percent)
 160 {
 161   g_return_val_if_fail (corner != NULL, 0.0);
 162   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 163
 164   return _gtk_css_number_value_get (corner->x, one_hundred_percent);
 165 }
 166
 167 double
 168 _gtk_css_corner_value_get_y (const GtkCssValue *corner,
 169                              double             one_hundred_percent)
 170 {
 171   g_return_val_if_fail (corner != NULL, 0.0);
 172   g_return_val_if_fail (corner->class == &GTK_CSS_VALUE_CORNER, 0.0);
 173
 174   return _gtk_css_number_value_get (corner->y, one_hundred_percent);
 175 }
 176