[gtk-doc] db2html: enable the expression extension

[Stefan Sauer <stefkost src gnome org>]

commit 372edb6372bd02836013980ea6e04596c2e528bb
Author: Stefan Sauer <ensonic users sf net>
Date:   Thu Jan 11 21:43:20 2018 +0100

    db2html: enable the expression extension
    
    This lets us remove the processes tile node. Also fix the ulink converter.

 tools/db2html.py              |    8 +++++---
 tools/templates/refentry.html |    5 +++--
 2 files changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/tools/db2html.py b/tools/db2html.py
index fac82cd..cdd3853 100644
--- a/tools/db2html.py
+++ b/tools/db2html.py
@@ -119,6 +119,7 @@ TEMPLATE_ENV = Environment(
     # loader=PackageLoader('gtkdoc', 'templates'),
     # autoescape=select_autoescape(['html', 'xml'])
     loader=FileSystemLoader(os.path.join(TOOL_PATH, 'templates')),
+    extensions=['jinja2.ext.do'],
     autoescape=False,
     trim_blocks=True,
 )
@@ -199,7 +200,7 @@ missing_tags = {}
 
 
 def convert__unknown(xml):
-    # TODO: warn only once
+    # warn only once
     if xml.tag not in missing_tags:
         logging.warning('Add tag converter for "%s"', xml.tag)
         missing_tags[xml.tag] = True
@@ -223,8 +224,9 @@ def convert_para(xml):
 
 
 def convert_ulink(xml):
-    url = xml.text
-    result = '<a class="%s" href="%s">%s</a>' % (xml.tag, url, url)
+    result = '<a class="%s" href="%s">%s</a>' % (xml.tag, xml.attrib['url'], xml.text)
+    if xml.tail:
+        result += xml.tail
     return result
 
 
diff --git a/tools/templates/refentry.html b/tools/templates/refentry.html
index 9ec4e51..d98449a 100644
--- a/tools/templates/refentry.html
+++ b/tools/templates/refentry.html
@@ -23,8 +23,9 @@
 
 {%- for sect in xml.findall('refsect1') %}
 <div class="refsect1">
-<a name="{{ sect.attrib['id'] }}"></a><h2>{{ sect.findtext('title') }}</h2>
-{# TODO: can we remove title so that we don't copy this again #}
+{% set tag=sect.find('title') -%}
+<a name="{{ sect.attrib['id'] }}"></a><h2>{{ tag.text }}</h2>
+{% do sect.remove(tag) %}
 {{ convert_inner(sect) }}
 </div>
 {%- endfor %}