[pango/serialization-improvements: 3/4] serializer: Support a "comment" field

[Matthias Clasen <matthiasc src gnome org>]

commit 960d07ec726c45fb74a48ada76987c3637c76759
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Nov 23 11:42:55 2021 -0500

    serializer: Support a "comment" field
    
    Json doesn't have comments, so we have to add
    an explicit comment value. This will be useful
    to describe what test cases are about.

 pango/serializer.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
---
diff --git a/pango/serializer.c b/pango/serializer.c
index 1a7cdcf5..287a5101 100644
--- a/pango/serializer.c
+++ b/pango/serializer.c
@@ -564,6 +564,7 @@ layout_to_json (PangoLayout               *layout,
 {
   JsonBuilder *builder;
   JsonNode *root;
+  const char *str;
 
   builder = json_builder_new_immutable ();
 
@@ -575,6 +576,25 @@ layout_to_json (PangoLayout               *layout,
       add_context (builder, layout->context);
     }
 
+  str = (const char *) g_object_get_data (G_OBJECT (layout), "comment");
+  if (str)
+    {
+      json_builder_set_member_name (builder, "comment");
+      if (strstr (str, "\n") != NULL)
+        {
+          char **strs = g_strsplit (str, "\n", -1);
+
+          json_builder_begin_array (builder);
+          for (int i = 0; strs[i]; i++)
+            json_builder_add_string_value (builder, strs[i]);
+          json_builder_end_array (builder);
+
+          g_strfreev (strs);
+        }
+      else
+        json_builder_add_string_value (builder, str);
+    }
+
   json_builder_set_member_name (builder, "text");
   json_builder_add_string_value (builder, layout->text);
 
@@ -1147,6 +1167,33 @@ json_to_layout (PangoContext                 *context,
 
   layout = pango_layout_new (context);
 
+  if (json_reader_read_member (reader, "comment"))
+    {
+      if (json_reader_is_array (reader))
+        {
+          GString *s;
+
+          s = g_string_new ("");
+          for (int i = 0; i < json_reader_count_elements (reader); i++)
+            {
+              json_reader_read_element (reader, i);
+              if (s->len > 0)
+                g_string_append_c (s, '\n');
+              g_string_append (s, json_reader_get_string_value (reader));
+              json_reader_end_element (reader);
+            }
+
+          g_object_set_data_full (G_OBJECT (layout), "comment",
+                                  g_string_free (s, FALSE),
+                                  g_free);
+        }
+      else
+        g_object_set_data_full (G_OBJECT (layout), "comment",
+                                g_strdup (json_reader_get_string_value (reader)),
+                                g_free);
+    }
+  json_reader_end_member (reader);
+
   if (json_reader_read_member (reader, "text"))
     pango_layout_set_text (layout, json_reader_get_string_value (reader), -1);
   json_reader_end_member (reader);