Add command for generating fragment.

av98.py

@@ -66,6 +66,7 @@ _ABBREVS = {
     "book": "bookmarks",
     "f":    "fold",
     "fo":   "forward",
+    "fr":   "fragment",
     "g":    "go",
     "h":    "history",
     "hist": "history",
@@ -1447,6 +1448,22 @@ Use 'ls -l' to see URLs."""
         cmd_str = cmd_str % tmp_file
         subprocess.call("%s | less %s" % (cmd_str, less_opt), shell=True)
 
+    @needs_gi
+    def do_fragment(self, *args):
+        """Add search fragment to the current URI."""
+        err = """Please provide text to include in the fragment."""
+        if not self.mime == 'text/gemini':
+            print("Can't generate fragment for %s." % self.mime)
+            return
+        fragment_input = args[0]
+        if not fragment_input:
+            print(err)
+            return
+        # Percent-encode input, append as fragment and visit the new URI.
+        uri_without_fragment = self.gi.url.split('#')[0]
+        self.do_go(uri_without_fragment\
+                + '#' + urllib.parse.quote(fragment_input))
+
     @needs_gi
     def do_fold(self, *args):
         """Run most recently visited item through "fold" command."""