css: Add a number value handling win32 sizes

gtk/gtkcsswin32sizevalue.c

@@ -0,0 +1,196 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "gtkcsswin32sizevalueprivate.h"
+
+#include "gtkwin32themeprivate.h"
+
+struct _GtkCssValue {
+  GTK_CSS_VALUE_BASE
+  double         scale;         /* needed for calc() math */
+  GtkWin32Theme *theme;
+  gint           id;
+};
+
+static GtkCssValue *    gtk_css_win32_size_value_new (double         scale,
+                                                      GtkWin32Theme *theme,
+                                                      int            id);
+
+static void
+gtk_css_value_win32_size_free (GtkCssValue *value)
+{
+  gtk_win32_theme_unref (value->theme);
+  g_slice_free (GtkCssValue, value);
+}
+
+static GtkCssValue *
+gtk_css_value_win32_size_compute (GtkCssValue             *value,
+                                  guint                    property_id,
+                                  GtkStyleProviderPrivate *provider,
+                                  GtkCssStyle             *style,
+                                  GtkCssStyle             *parent_style)
+{
+  return _gtk_css_number_value_new (value->scale * gtk_win32_theme_get_size (value->theme, value->id), GTK_CSS_PX);
+}
+
+static gboolean
+gtk_css_value_win32_size_equal (const GtkCssValue *value1,
+                                const GtkCssValue *value2)
+{
+  return gtk_win32_theme_equal (value1->theme, value2->theme) &&
+         value1->id == value2->id;
+}
+
+static void
+gtk_css_value_win32_size_print (const GtkCssValue *value,
+                                GString           *string)
+{
+  if (value->scale != 1.0)
+    {
+      g_string_append_printf (string, "%g * ", value->scale);
+    }
+  g_string_append (string, "-gtk-win32-size(");
+  gtk_win32_theme_print (value->theme, string);
+  g_string_append_printf (string, ", %d)", value->id);
+}
+
+static double
+gtk_css_value_win32_size_get (const GtkCssValue *value,
+                              double             one_hundred_percent)
+{
+  return value->scale * gtk_win32_theme_get_size (value->theme, value->id);
+}
+
+static GtkCssDimension
+gtk_css_value_win32_size_get_dimension (const GtkCssValue *value)
+{
+  return GTK_CSS_DIMENSION_LENGTH;
+}
+
+static gboolean
+gtk_css_value_win32_size_has_percent (const GtkCssValue *value)
+{
+  return FALSE;
+}
+
+static GtkCssValue *
+gtk_css_value_win32_size_multiply (const GtkCssValue *value,
+                                   double             factor)
+{
+  return gtk_css_win32_size_value_new (value->scale * factor, value->theme, value->id);
+}
+
+static GtkCssValue *
+gtk_css_value_win32_size_try_add (const GtkCssValue *value1,
+                                  const GtkCssValue *value2)
+{
+  if (!gtk_css_value_win32_size_equal (value1, value2))
+    return NULL;
+
+  return gtk_css_win32_size_value_new (value1->scale + value2->scale, value1->theme, value1->id);
+}
+
+static gint
+gtk_css_value_win32_size_get_calc_term_order (const GtkCssValue *value)
+{
+  return 2000;
+}
+
+static const GtkCssNumberValueClass GTK_CSS_VALUE_WIN32_SIZE = {
+  {
+    gtk_css_value_win32_size_free,
+    gtk_css_value_win32_size_compute,
+    gtk_css_value_win32_size_equal,
+    gtk_css_number_value_transition,
+    gtk_css_value_win32_size_print
+  },
+  gtk_css_value_win32_size_get,
+  gtk_css_value_win32_size_get_dimension,
+  gtk_css_value_win32_size_has_percent,
+  gtk_css_value_win32_size_multiply,
+  gtk_css_value_win32_size_try_add,
+  gtk_css_value_win32_size_get_calc_term_order
+};
+
+static GtkCssValue *
+gtk_css_win32_size_value_new (double         scale,
+                              GtkWin32Theme *theme,
+                              int            id)
+{
+  GtkCssValue *result;
+
+  result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_WIN32_SIZE.value_class);
+  result->scale = scale;
+  result->theme = gtk_win32_theme_ref (theme);
+  result->id = id;
+
+  return result;
+}
+
+GtkCssValue *
+gtk_css_win32_size_value_parse (GtkCssParser           *parser,
+                                GtkCssNumberParseFlags  flags)
+{
+  GtkWin32Theme *theme;
+  char *theme_class;
+  GtkCssValue *result;
+  int id;
+
+  if (!_gtk_css_parser_try (parser, "-gtk-win32-size(", TRUE))
+    {
+      _gtk_css_parser_error (parser, "Expected '-gtk-win32-size('");
+      return NULL;
+    }
+
+  theme_class = _gtk_css_parser_try_name (parser, TRUE);
+  if (theme_class == NULL)
+    {
+      _gtk_css_parser_error (parser, "Expected name as first argument to  '-gtk-win32-size'");
+      return NULL;
+    }
+
+  if (! _gtk_css_parser_try (parser, ",", TRUE))
+    {
+      g_free (theme_class);
+      _gtk_css_parser_error (parser, "Expected ','");
+      return NULL;
+    }
+
+  if (!_gtk_css_parser_try_int (parser, &id))
+    {
+      g_free (theme_class);
+      _gtk_css_parser_error (parser, "Expected an integer ID");
+      return 0;
+    }
+
+  if (!_gtk_css_parser_try (parser, ")", TRUE))
+    {
+      g_free (theme_class);
+      _gtk_css_parser_error (parser, "Expected ')'");
+      return NULL;
+    }
+
+  theme = gtk_win32_theme_lookup (theme_class);
+  g_free (theme_class);
+
+  result = gtk_css_win32_size_value_new (1.0, theme, id);
+  gtk_win32_theme_unref (theme);
+
+  return result;
+}