[gtk+/win32-theme] win32-theme: Support -gtk-win32-size CSS value

[Alexander Larsson <alexl src gnome org>]

commit 7d2ed8ffbb76a8a4e37cfd8b610063a8bff0869d
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Nov 16 12:19:20 2011 +0100

    win32-theme: Support -gtk-win32-size CSS value

 gtk/gtkstyleproperty.c     |   36 +++++++++++++++++++---
 gtk/gtkwin32theme.c        |   71 ++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkwin32themeprivate.h |    3 ++
 3 files changed, 105 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtkstyleproperty.c b/gtk/gtkstyleproperty.c
index 7c302ad..f511c71 100644
--- a/gtk/gtkstyleproperty.c
+++ b/gtk/gtkstyleproperty.c
@@ -385,6 +385,17 @@ int_value_parse (GtkCssParser *parser,
 {
   gint i;
 
+  if (_gtk_css_parser_begins_with (parser, '-'))
+    {
+      int res = _gtk_win32_theme_int_parse (parser, base, &i);
+      if (res >= 0)
+	{
+	  g_value_set_int (value, i);
+	  return res > 0;
+	}
+      /* < 0 => continue */
+    }
+
   if (!_gtk_css_parser_try_int (parser, &i))
     {
       _gtk_css_parser_error (parser, "Expected a valid integer value");
@@ -589,11 +600,26 @@ border_value_parse (GtkCssParser *parser,
 
   for (i = 0; i < G_N_ELEMENTS (numbers); i++)
     {
-      if (!_gtk_css_parser_try_uint (parser, &numbers[i]))
-        break;
+      if (_gtk_css_parser_begins_with (parser, '-'))
+	{
+	  /* These are strictly speaking signed, but we want to be able to use them
+	     for unsigned types too, as the actual ranges of values make this safe */
+	  int res = _gtk_win32_theme_int_parse (parser, base, (int *)&numbers[i]);
+
+	  if (res == 0) /* Parse error, report */
+	    return FALSE;
+
+	  if (res < 0) /* Nothing known to expand */
+	    break;
+	}
+      else
+	{
+	  if (!_gtk_css_parser_try_uint (parser, &numbers[i]))
+	    break;
 
-      /* XXX: shouldn't allow spaces here? */
-      _gtk_css_parser_try (parser, "px", TRUE);
+	  /* XXX: shouldn't allow spaces here? */
+	  _gtk_css_parser_try (parser, "px", TRUE);
+	}
     }
 
   if (i == 0)
diff --git a/gtk/gtkwin32theme.c b/gtk/gtkwin32theme.c
index 71f7ad2..78ac8963 100644
--- a/gtk/gtkwin32theme.c
+++ b/gtk/gtkwin32theme.c
@@ -365,3 +365,74 @@ _gtk_win32_theme_part_render  (GtkWin32ThemePart  *part,
   return cairo_pattern_create_rgb (color.red, color.green, color.blue);
 #endif
 }
+
+int
+_gtk_win32_theme_int_parse (GtkCssParser      *parser,
+			    GFile             *base,
+			    int               *value)
+{
+  char *class;
+  int arg;
+
+  if (_gtk_css_parser_try (parser,
+			   "-gtk-win32-size",
+			   TRUE))
+    {
+      if (!_gtk_css_parser_try (parser, "(", TRUE))
+	{
+	  _gtk_css_parser_error (parser,
+				 "Expected '(' after '-gtk-win32-size'");
+	  return 0;
+	}
+
+      class = _gtk_css_parser_try_name (parser, TRUE);
+      if (class == NULL)
+	{
+	  _gtk_css_parser_error (parser,
+				 "Expected name as first argument to  '-gtk-win32-size'");
+	  return 0;
+	}
+
+      if (! _gtk_css_parser_try (parser, ",", TRUE))
+	{
+	  g_free (class);
+	  _gtk_css_parser_error (parser,
+				 "Expected ','");
+	  return 0;
+	}
+
+      if (!_gtk_css_parser_try_int (parser, &arg))
+	{
+	  g_free (class);
+	  _gtk_css_parser_error (parser, "Expected a valid integer value");
+	  return 0;
+	}
+
+      if (!_gtk_css_parser_try (parser, ")", TRUE))
+	{
+	  _gtk_css_parser_error (parser,
+				 "Expected ')'");
+	  return 0;
+	}
+
+#ifdef G_OS_WIN32
+      if (use_xp_theme && get_theme_sys_metric != NULL)
+	{
+	  HTHEME theme = lookup_htheme_by_classname (class);
+
+	  /* If theme is NULL it will just return the GetSystemMetrics value */
+	  *value = get_theme_sys_metric (theme, arg);
+	}
+      else
+	*value = GetSystemMetrics (arg);
+#else
+      *value = 1;
+#endif
+
+      g_free (class);
+
+      return 1;
+    }
+
+  return -1;
+}
diff --git a/gtk/gtkwin32themeprivate.h b/gtk/gtkwin32themeprivate.h
index adad562..b066d9a 100644
--- a/gtk/gtkwin32themeprivate.h
+++ b/gtk/gtkwin32themeprivate.h
@@ -42,6 +42,9 @@ int                _gtk_win32_theme_part_parse     (GtkCssParser      *parser,
 cairo_pattern_t   *_gtk_win32_theme_part_render   (GtkWin32ThemePart  *part,
 						   int                 width,
 						   int                 height);
+int                _gtk_win32_theme_int_parse     (GtkCssParser      *parser,
+						   GFile             *base,
+						   int               *value);
 
 G_END_DECLS