From 15518bad12ddf39730f24249bfa3d6c630fdc9ef Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Mon, 22 Aug 2016 17:48:47 +0900
Subject: [PATCH] Fix could not translate the content of meta directive (ref:
 #1734)

---
 CHANGES                            |  1 +
 sphinx/directives/patches.py       |  1 +
 sphinx/transforms.py               |  7 ++++++-
 sphinx/util/nodes.py               | 20 ++++++++++++++++++++
 tests/roots/test-intl/contents.po  |  6 ++++++
 tests/roots/test-intl/contents.txt |  4 ++++
 tests/test_intl.py                 |  8 ++++++++
 7 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index 64b3f9bbb..519672b51 100644
--- a/CHANGES
+++ b/CHANGES
@@ -130,6 +130,7 @@ Bugs fixed
   directives
 * #2485: autosummary crashes with multiple source_suffix values
 * #1734: Could not translate the caption of toctree directive
+* Could not translate the content of meta directive (ref: #1734)
 
 Documentation
 -------------
diff --git a/sphinx/directives/patches.py b/sphinx/directives/patches.py
index 6a88db09a..041bee360 100644
--- a/sphinx/directives/patches.py
+++ b/sphinx/directives/patches.py
@@ -47,6 +47,7 @@ class Meta(html.Meta):
                 meta = node.details['nodes'][0]
                 meta.source = env.doc2path(env.docname)
                 meta.line = self.lineno
+                meta.rawcontent = meta['content']
 
                 # docutils' meta nodes aren't picklable because the class is nested
                 meta.__class__ = addnodes.meta
diff --git a/sphinx/transforms.py b/sphinx/transforms.py
index 8792d8f11..9f2aeb8d1 100644
--- a/sphinx/transforms.py
+++ b/sphinx/transforms.py
@@ -22,7 +22,7 @@ from sphinx.locale import _, init as init_locale
 from sphinx.util import split_index_msg
 from sphinx.util.nodes import (
     traverse_translatable_index, extract_messages, LITERAL_TYPE_NODES, IMAGE_TYPE_NODES,
-    apply_source_workaround,
+    apply_source_workaround, is_pending_meta,
 )
 from sphinx.util.i18n import find_catalog, format_date
 from sphinx.util.pycompat import indent
@@ -400,6 +400,11 @@ class Locale(Transform):
                 node.apply_translated_message(msg, msgstr)
                 continue
 
+            # update meta nodes
+            if is_pending_meta(node):
+                node.details['nodes'][0]['content'] = msgstr
+                continue
+
             # Avoid "Literal block expected; none found." warnings.
             # If msgstr ends with '::' then it cause warning message at
             # parser.parse() processing.
diff --git a/sphinx/util/nodes.py b/sphinx/util/nodes.py
index e0a6e0195..cdbf44d76 100644
--- a/sphinx/util/nodes.py
+++ b/sphinx/util/nodes.py
@@ -85,6 +85,14 @@ IGNORED_NODES = (
 )
 
 
+def is_pending_meta(node):
+    if (isinstance(node, nodes.pending) and
+       isinstance(node.details.get('nodes', [None])[0], addnodes.meta)):
+        return True
+    else:
+        return False
+
+
 def is_translatable(node):
     if isinstance(node, addnodes.translatable):
         return True
@@ -106,6 +114,11 @@ def is_translatable(node):
     if isinstance(node, nodes.image) and node.get('translatable'):
         return True
 
+    if isinstance(node, addnodes.meta):
+        return True
+    if is_pending_meta(node):
+        return True
+
     return False
 
 
@@ -117,6 +130,9 @@ LITERAL_TYPE_NODES = (
 IMAGE_TYPE_NODES = (
     nodes.image,
 )
+META_TYPE_NODES = (
+    addnodes.meta,
+)
 
 
 def extract_messages(doctree):
@@ -134,6 +150,10 @@ def extract_messages(doctree):
             msg = '.. image:: %s' % node['uri']
             if node.get('alt'):
                 msg += '\n   :alt: %s' % node['alt']
+        elif isinstance(node, META_TYPE_NODES):
+            msg = node.rawcontent
+        elif is_pending_meta(node):
+            msg = node.details['nodes'][0].rawcontent
         else:
             msg = node.rawsource.replace('\n', ' ').strip()
 
diff --git a/tests/roots/test-intl/contents.po b/tests/roots/test-intl/contents.po
index e7f71eafa..76ef049f0 100644
--- a/tests/roots/test-intl/contents.po
+++ b/tests/roots/test-intl/contents.po
@@ -18,3 +18,9 @@ msgstr ""
 
 msgid "Table of Contents"
 msgstr "TABLE OF CONTENTS"
+
+msgid "testdata for i18n"
+msgstr "TESTDATA FOR I18N"
+
+msgid "i18n, sphinx, markup"
+msgstr "I18N, SPHINX, MARKUP"
diff --git a/tests/roots/test-intl/contents.txt b/tests/roots/test-intl/contents.txt
index 20542dc81..e2336856c 100644
--- a/tests/roots/test-intl/contents.txt
+++ b/tests/roots/test-intl/contents.txt
@@ -1,6 +1,10 @@
 CONTENTS
 ========
 
+.. meta::
+   :description: testdata for i18n
+   :keywords: i18n, sphinx, markup
+
 .. toctree::
    :maxdepth: 2
    :numbered:
diff --git a/tests/test_intl.py b/tests/test_intl.py
index 1f7242dfa..80e3eaa64 100644
--- a/tests/test_intl.py
+++ b/tests/test_intl.py
@@ -360,6 +360,14 @@ def test_gettext_builder(app, status, warning):
 def test_html_builder(app, status, warning):
     app.builder.build_all()
 
+    # --- test for meta
+
+    result = (app.outdir / 'contents.html').text(encoding='utf-8')
+    expected_expr = '<meta content="TESTDATA FOR I18N" name="description" />'
+    yield assert_in, expected_expr, result
+    expected_expr = '<meta content="I18N, SPHINX, MARKUP" name="keywords" />'
+    yield assert_in, expected_expr, result
+
     # --- test for #955 cant-build-html-with-footnotes-when-using
 
     # expect no error by build