Wrap float environment on writing literal_block to latex

sphinx/texinputs/sphinx.sty

@@ -522,3 +522,9 @@
     \gdef\@chappos{}
   }
 \fi
+
+% Define literal-block environment
+\RequirePackage{float}
+\floatstyle{plaintop}
+\newfloat{literal-block}{htbp}{loc}[chapter]
+\floatname{literal-block}{List}

sphinx/writers/latex.py

@@ -1347,9 +1347,8 @@ class LaTeXTranslator(nodes.NodeVisitor):
                 linenos = node['linenos']
             caption = node.get('caption')
             if caption:
-                self.body.append('\n{\\colorbox[rgb]{0.9,0.9,0.9}'
-                                 '{\\makebox[\\textwidth][l]'
-                                 '{\\small\\texttt{%s}}}}\n' % (caption,))
+                self.body.append('\n\\begin{literal-block}\caption{%s}\n' %
+                                 (caption,))
             def warner(msg):
                 self.builder.warn(msg, (self.curfilestack[-1], node.line))
             hlcode = self.highlighter.highlight_block(code, lang, warn=warner,
@@ -1367,6 +1366,8 @@ class LaTeXTranslator(nodes.NodeVisitor):
             hlcode = hlcode.rstrip() + '\n'
             self.body.append('\n' + hlcode + '\\end{%sVerbatim}\n' %
                              (self.table and 'Original' or ''))
+            if caption:
+                self.body.append('\n\\end{literal-block}\n')
             raise nodes.SkipNode
     def depart_literal_block(self, node):
         self.body.append('\n\\end{alltt}\n')

tests/test_directive_code.py

@@ -93,8 +93,7 @@ def test_code_block_caption_html(app):
 def test_code_block_caption_latex(app):
     app.builder.build('index')
     latex = (app.outdir / 'Python.tex').text()
-    caption = ('{\\colorbox[rgb]{0.9,0.9,0.9}{\\makebox[\\textwidth][l]'
-               '{\\small\\texttt{caption-test.rb}}}}')
+    caption = '\\caption{caption-test.rb}'
     assert caption in latex
 
 
@@ -168,6 +167,5 @@ def test_literalinclude_caption_html(app):
 def test_literalinclude_caption_latex(app):
     app.builder.build('index')
     latex = (app.outdir / 'Python.tex').text()
-    caption = ('{\\colorbox[rgb]{0.9,0.9,0.9}{\\makebox[\\textwidth][l]'
-               '{\\small\\texttt{caption-test.py}}}}')
+    caption = '\\caption{caption-test.py}'
     assert caption in latex