[gtk+] css: Implement font-variant-east-asian

[Matthias Clasen <matthiasc src gnome org>]

commit b91f3ce3312ba23041ee8844b446599bbf62f5e4
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Sep 18 12:42:42 2017 -0400

    css: Implement font-variant-east-asian
    
    This is translated to the corresponding OpenType features.

 gtk/gtkcssstyle.c             |   26 +++++++++++++++
 gtk/gtkcssstylepropertyimpl.c |   70 +++++++++++++++++++++++++++++++++++++++++
 gtk/gtkcsstypesprivate.h      |    1 +
 3 files changed, 97 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcssstyle.c b/gtk/gtkcssstyle.c
index 1fbe5e6..f6eaa35 100644
--- a/gtk/gtkcssstyle.c
+++ b/gtk/gtkcssstyle.c
@@ -231,6 +231,7 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
   GtkCssValue *caps;
   GtkCssValue *numeric;
   GtkCssValue *alternatives;
+  GtkCssValue *east_asian;
   GString *s;
   int i;
 
@@ -379,6 +380,31 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
         g_string_append (s, "hist 1");
     }
 
+  east_asian = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_EAST_ASIAN);
+  for (i = 0; i < _gtk_css_array_value_get_n_values (east_asian); i++)
+    {
+      GtkCssValue *value = _gtk_css_array_value_get_nth (east_asian, i);
+      if (s->len > 0) g_string_append (s, ", ");
+      if (strcmp (_gtk_css_ident_value_get (value), "jis78") == 0)
+        g_string_append (s, "jp78 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "jis83") == 0)
+        g_string_append (s, "jp83 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "jis90") == 0)
+        g_string_append (s, "jp90 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "jis04") == 0)
+        g_string_append (s, "jp04 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "simplified") == 0)
+        g_string_append (s, "smpl 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "traditional") == 0)
+        g_string_append (s, "trad 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "full-width") == 0)
+        g_string_append (s, "fwid 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "proportional-width") == 0)
+        g_string_append (s, "pwid 1");
+      if (strcmp (_gtk_css_ident_value_get (value), "ruby") == 0)
+        g_string_append (s, "ruby 1");
+    }
+
   attrs = add_pango_attr (attrs, pango_attr_font_features_new (s->str));
   g_string_free (s, TRUE);
 
diff --git a/gtk/gtkcssstylepropertyimpl.c b/gtk/gtkcssstylepropertyimpl.c
index 25c66f9..a81a5a2 100644
--- a/gtk/gtkcssstylepropertyimpl.c
+++ b/gtk/gtkcssstylepropertyimpl.c
@@ -750,6 +750,68 @@ parse_font_variant_alternatives (GtkCssStyleProperty *property,
 }
 
 static GtkCssValue *
+parse_font_variant_east_asian (GtkCssStyleProperty *property,
+                               GtkCssParser        *parser)
+{
+  GtkCssValue *value = NULL;
+
+  if (_gtk_css_parser_try (parser, "normal", TRUE))
+    value = _gtk_css_array_value_new (_gtk_css_ident_value_new ("normal"));
+  else
+    {
+      GtkCssValue *values[3] = { NULL, NULL, NULL };
+      guint n_values = 0;
+      guint old_n;
+      gboolean variant = FALSE;
+      gboolean width = FALSE;
+      gboolean ruby = FALSE;
+
+      do {
+        old_n = n_values;
+        if (!variant)
+          {
+            values[n_values] = _gtk_css_ident_value_try (parser, "jis78", "jis83", "jis90", "jis04",
+                                                                 "simplified", "traditional", NULL);
+            if (values[n_values])
+              {
+                n_values++;
+                variant = TRUE;
+              }
+         }
+        if (!width)
+          {
+            values[n_values] = _gtk_css_ident_value_try (parser, "full-width"
+                                                                 "proportional-width", NULL);
+            if (values[n_values])
+              {
+                n_values++;
+                width = TRUE;
+              }
+         }
+        if (!ruby)
+          {
+            values[n_values] = _gtk_css_ident_value_try (parser, "ruby", NULL);
+            if (values[n_values])
+              {
+                n_values++;
+                ruby = TRUE;
+              }
+         }
+        if (old_n == n_values)
+          {
+            _gtk_css_parser_error (parser, "Not a valid value");
+            return NULL;
+          }
+      } while (!value_is_done_parsing (parser));
+
+      value = _gtk_css_array_value_new_from_array (values, n_values);
+    }
+
+  return value;
+}
+
+
+static GtkCssValue *
 box_shadow_value_parse (GtkCssStyleProperty *property,
                         GtkCssParser        *parser)
 {
@@ -1282,6 +1344,14 @@ _gtk_css_style_property_init_properties (void)
                                           parse_font_variant_alternatives,
                                           NULL,
                                           _gtk_css_array_value_new (_gtk_css_ident_value_new ("normal")));
+  gtk_css_style_property_register        ("font-variant-east-asian",
+                                          GTK_CSS_PROPERTY_FONT_VARIANT_EAST_ASIAN,
+                                          G_TYPE_NONE,
+                                          0,
+                                          GTK_CSS_AFFECTS_TEXT | GTK_CSS_AFFECTS_TEXT_ATTRS,
+                                          parse_font_variant_east_asian,
+                                          NULL,
+                                          _gtk_css_array_value_new (_gtk_css_ident_value_new ("normal")));
   gtk_css_style_property_register        ("text-shadow",
                                           GTK_CSS_PROPERTY_TEXT_SHADOW,
                                           G_TYPE_NONE,
diff --git a/gtk/gtkcsstypesprivate.h b/gtk/gtkcsstypesprivate.h
index 6518a24..8e939f3 100644
--- a/gtk/gtkcsstypesprivate.h
+++ b/gtk/gtkcsstypesprivate.h
@@ -169,6 +169,7 @@ enum { /*< skip >*/
   GTK_CSS_PROPERTY_FONT_VARIANT_CAPS,
   GTK_CSS_PROPERTY_FONT_VARIANT_NUMERIC,
   GTK_CSS_PROPERTY_FONT_VARIANT_ALTERNATIVES,
+  GTK_CSS_PROPERTY_FONT_VARIANT_EAST_ASIAN,
   GTK_CSS_PROPERTY_TEXT_SHADOW,
   GTK_CSS_PROPERTY_BOX_SHADOW,
   GTK_CSS_PROPERTY_MARGIN_TOP,