Add pango_attr_list_to/from_string

Add an api to serialize PangoAttrList.

This will be useful in testing and debugging.

2 files changed, 87 insertions, 0 deletions

diff --git a/tests/meson.build b/tests/meson.build
index b5eda3e7..00741a14 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -53,6 +53,7 @@ if cairo_dep.found()
     [ 'cxx-test', [ 'cxx-test.cpp' ], [ libpangocairo_dep, gobject_dep, harfbuzz_dep ] ],
     [ 'test-harfbuzz', [ 'test-harfbuzz.c' ], [ libpangocairo_dep, gobject_dep, harfbuzz_dep ] ],
     [ 'test-break', [ 'test-break.c', 'test-common.c', 'validate-log-attrs.c' ], [libpangocairo_dep, glib_dep, harfbuzz_dep ] ],
+    [ 'testserialize', [ 'testserialize.c' ], [ libpangocairo_dep ] ],
   ]
 
   if host_system != 'darwin'
diff --git a/tests/testserialize.c b/tests/testserialize.c
new file mode 100644
index 00000000..cb5b27fd
--- /dev/null
+++ b/tests/testserialize.c
@@ -0,0 +1,86 @@
+/* Pango
+ *
+ * Copyright (C) 2021 Matthias Clasen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+#include <glib.h>
+#include <pango/pangocairo.h>
+
+static void
+test_serialize_attr_list (void)
+{
+  const char *valid[] = {
+    "5 16 style italic",
+    "0 10 foreground red, 5 15 weight bold, 0 200 font-desc \"Sans Small-Caps 10\"",
+    "0 10 foreground red\n5 15 weight bold\n0 200 font-desc \"Sans Small-Caps 10\"",
+    "  0   10   fallback  false,\n 5 15 weight semilight\n\n \n \n",
+    "0 100 font-desc \"Cantarell, Sans, Italic Ultra-Light 64\", 10 11 weight 100",
+    "0 -1 size 10",
+    "0 1 weight 700, 2 4 weight book",
+    "0 200 rise 100\n5 15 family Times\n10 11 size 10240\n11 100 fallback 0\n30 60 stretch 2\n",
+    ""
+  };
+  const char *roundtripped[] = {
+    "5 16 style italic",
+    "0 10 foreground #ffff00000000\n5 15 weight bold\n0 200 font-desc \"Sans Small-Caps 10\"",
+    "0 10 foreground #ffff00000000\n5 15 weight bold\n0 200 font-desc \"Sans Small-Caps 10\"",
+    "0 10 fallback false\n5 15 weight semilight",
+    "0 100 font-desc \"Cantarell,Sans Ultra-Light Italic 64\"\n10 11 weight thin",
+    "0 4294967295 size 10",
+    "0 1 weight bold\n2 4 weight book",
+    "0 200 rise 100\n5 15 family Times\n10 11 size 10240\n11 100 fallback false\n30 60 stretch condensed",
+    ""
+  };
+  const char *invalid[] = {
+    "not an attr list",
+    "0 -1 FOREGROUND xyz",
+    ",,bla.wewq",
+  };
+
+  for (int i = 0; i < G_N_ELEMENTS (valid); i++)
+    {
+      PangoAttrList *attrs;
+      char *str;
+
+      attrs = pango_attr_list_from_string (valid[i]);
+      g_assert_nonnull (attrs);
+      str = pango_attr_list_to_string (attrs);
+      g_assert_cmpstr (str, ==, roundtripped[i]);
+      g_free (str);
+      pango_attr_list_unref (attrs);
+    }
+
+  for (int i = 0; i < G_N_ELEMENTS (invalid); i++)
+    {
+      PangoAttrList *attrs;
+
+      attrs = pango_attr_list_from_string (invalid[i]);
+      g_assert_null (attrs);
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_add_func ("/serialize/attr-list", test_serialize_attr_list);
+
+  return g_test_run ();
+}