From cc3e4fba75c20196bfb687190eb1f784b09222e0 Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Wed, 6 Jul 2016 21:00:49 +0900
Subject: [PATCH] Jinja2-ize latex writer

---
 sphinx/templates/latex/content.tex_t | 42 ++++++++++++++++++++
 sphinx/util/template.py              | 57 ++++++++++++++++++++++++++++
 sphinx/writers/latex.py              | 54 ++++----------------------
 3 files changed, 106 insertions(+), 47 deletions(-)
 create mode 100644 sphinx/templates/latex/content.tex_t
 create mode 100644 sphinx/util/template.py

diff --git a/sphinx/templates/latex/content.tex_t b/sphinx/templates/latex/content.tex_t
new file mode 100644
index 000000000..fb5b1decd
--- /dev/null
+++ b/sphinx/templates/latex/content.tex_t
@@ -0,0 +1,42 @@
+%% Generated by Sphinx.
+\def\sphinxdocclass{<%= docclass %>}
+\newif\ifsphinxKeepOldNames <%= keepoldnames %>
+\documentclass[<%= papersize %>,<%= pointsize %><%= classoptions %>]{<%= wrapperclass %>}
+\ifdefined\pdfpxdimen
+   \let\sphinxpxdimen\pdfpxdimen\else\newdimen\sphinxpxdimen
+\fi \sphinxpxdimen=<%= pxunit %>\relax
+\usepackage{iftex}
+<%= passoptionstopackages %>
+<%= inputenc %>
+<%= utf8extra %>
+<%= cmappkg %>
+<%= fontenc %>
+<%= amsmath %>
+<%= babel %>
+<%= fontpkg %>
+<%= fncychap %>
+<%= longtable %>
+\usepackage{sphinx}
+\usepackage{multirow}
+\usepackage{eqparbox}
+<%= usepackages %>
+<%= contentsname %>
+<%= numfig_format %>
+<%= pageautorefname %>
+<%= tocdepth %>
+<%= secnumdepth %>
+<%= preamble %>
+
+\title{<%= title %>}
+\date{<%= date %>}
+\release{<%= release %>}
+\author{<%= author %>}
+\newcommand{\sphinxlogo}{<%= logo %>}
+\renewcommand{\releasename}{<%= releasename %>}
+<%= makeindex %>
+<%= body %>
+<%= footer %>
+<%= indices %>
+\renewcommand{\indexname}{<%= indexname %>}
+<%= printindex %>
+\end{document}
diff --git a/sphinx/util/template.py b/sphinx/util/template.py
new file mode 100644
index 000000000..b89a4c960
--- /dev/null
+++ b/sphinx/util/template.py
@@ -0,0 +1,57 @@
+# -*- coding: utf-8 -*-
+"""
+    sphinx.util.template
+    ~~~~~~~~~~~~~~~~~~~~
+
+    Templates utility functions for Sphinx.
+
+    :copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import os
+from jinja2.sandbox import SandboxedEnvironment
+
+from sphinx import package_dir
+from sphinx.jinja2glue import SphinxFileSystemLoader
+
+
+class BaseRenderer(object):
+    def __init__(self, loader=None):
+        self.env = SandboxedEnvironment(loader=loader)
+        self.env.filters['repr'] = repr
+
+    def render(self, template_name, context):
+        return self.env.get_template(template_name).render(context)
+
+    def render_string(self, source, context):
+        return self.env.from_string(source).render(context)
+
+
+class FileRenderer(BaseRenderer):
+    def __init__(self, search_path):
+        loader = SphinxFileSystemLoader(search_path)
+        super(FileRenderer, self).__init__(loader)
+
+    @classmethod
+    def render_from_file(cls, filename, context):
+        dirname = os.path.dirname(filename)
+        basename = os.path.basename(filename)
+        return cls(dirname).render(basename, context)
+
+
+class SphinxRenderer(FileRenderer):
+    def __init__(self):
+        super(SphinxRenderer, self).__init__(os.path.join(package_dir, 'templates'))
+
+
+class LaTeXRenderer(SphinxRenderer):
+    def __init__(self):
+        super(LaTeXRenderer, self).__init__()
+
+        # use JSP/eRuby like tagging instead because curly bracket; the default
+        # tagging of jinja2 is not good for LaTeX sources.
+        self.env.variable_start_string = '<%='
+        self.env.variable_end_string = '%>'
+        self.env.block_start_string = '<%'
+        self.env.block_end_string = '%>'
diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index 528aca192..72050ad89 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -28,46 +28,10 @@ from sphinx.locale import admonitionlabels, _
 from sphinx.util import split_into
 from sphinx.util.i18n import format_date
 from sphinx.util.nodes import clean_astext, traverse_parent
+from sphinx.util.template import LaTeXRenderer
 from sphinx.util.texescape import tex_escape_map, tex_replace_map
 from sphinx.util.smartypants import educate_quotes_latex
 
-HEADER = r'''%% Generated by Sphinx.
-\def\sphinxdocclass{%(docclass)s}
-\newif\ifsphinxKeepOldNames %(keepoldnames)s
-\documentclass[%(papersize)s,%(pointsize)s%(classoptions)s]{%(wrapperclass)s}
-\ifdefined\pdfpxdimen
-   \let\sphinxpxdimen\pdfpxdimen\else\newdimen\sphinxpxdimen
-\fi \sphinxpxdimen=%(pxunit)s\relax
-\usepackage{iftex}
-%(passoptionstopackages)s
-%(inputenc)s
-%(utf8extra)s
-%(cmappkg)s
-%(fontenc)s
-%(amsmath)s
-%(babel)s
-%(fontpkg)s
-%(fncychap)s
-%(longtable)s
-\usepackage{sphinx}
-\usepackage{multirow}
-\usepackage{eqparbox}
-%(usepackages)s
-%(contentsname)s
-%(numfig_format)s
-%(pageautorefname)s
-%(tocdepth)s
-%(secnumdepth)s
-%(preamble)s
-
-\title{%(title)s}
-\date{%(date)s}
-\release{%(release)s}
-\author{%(author)s}
-\newcommand{\sphinxlogo}{%(logo)s}
-\renewcommand{\releasename}{%(releasename)s}
-%(makeindex)s
-'''
 
 BEGIN_DOC = r'''
 \begin{document}
@@ -76,12 +40,8 @@ BEGIN_DOC = r'''
 %(tableofcontents)s
 '''
 
-FOOTER = r'''
-\renewcommand{\indexname}{%(indexname)s}
-%(printindex)s
-\end{document}
-'''
 
+DEFAULT_TEMPLATE = 'latex/content.tex_t'
 URI_SCHEMES = ('mailto:', 'http:', 'https:', 'ftp:')
 SECNUMDEPTH = 3
 
@@ -543,11 +503,11 @@ class LaTeXTranslator(nodes.NodeVisitor):
         return docclass
 
     def astext(self):
-        return (HEADER % self.elements +
-                u''.join(self.body) +
-                '\n' + self.elements['footer'] + '\n' +
-                self.generate_indices() +
-                FOOTER % self.elements)
+        self.elements.update({
+            'body': u''.join(self.body),
+            'indices': self.generate_indices()
+        })
+        return LaTeXRenderer().render(DEFAULT_TEMPLATE, self.elements)
 
     def hypertarget(self, id, withdoc=True, anchor=True):
         if withdoc: