Added link_target option support.

docs/usage.rst

@@ -38,7 +38,9 @@ The following tweaks are read by the translator and built-in tags:
   (e.g. lynx) compatibility, e.g. ``<b>``, ``<i>``, ``<center>``, and
   others. Defaults to ``True``.
 - ``title_level`` (HTML): level at which to start for titles and subtitles,
-  e.g. ``h5`` for ``h5`` for titles and ``h6`` for subtitles.
+  e.g. 5 means ``h5`` for ``h5`` for titles and ``h6`` for subtitles.
+- ``link_target`` (HTML): either ``self`` (default, load in the same
+  frame as it was clicked) or ``blank`` (load in an other window).
 
 An example call would be:
 

textoutpc/builtin/_Link.py

@@ -52,7 +52,12 @@ class LinkTag(_InlineTag):
 		self._validate()
 
 	def begin_html(self):
-		return '<a href="{}">'.format(_htmlescape(self._url))
+		target = self.tweak("link_target", "").casefold()
+		tattrs = ''
+		if target == 'blank':
+			tattrs = ' target="_blank" rel="noopener"'
+
+		return '<a href="{}"{}>'.format(_htmlescape(self._url), tattrs)
 
 	def end_html(self):
 		return '</a>'

textoutpc/builtin/_Title.py

@@ -21,8 +21,8 @@ class TitleTag(_BlockTag):
 	raw = True
 
 	def prepare(self, name, value):
-		level = self.tweak("title_level", "1")
-		if level[0] == "h":
+		level = self.tweak("title_level", "1").casefold()
+		if isinstance(level, str) and level[0] == "h":
 			level = level[1:]
 		level = int(level)
 		assert 1 <= level <= 5