pass max width to latex adjustbox

sphinxcontrib/plantuml.py

@@ -632,7 +632,7 @@ def _lookup_latex_format(fmt):
         )
 
 
-def _latex_adjustbox_options(self, node):
+def _latex_adjustbox_options(self, node):  # noqa: C901
     adjustbox_options = []
     if 'width' in node:
         if 'scale' in node:
@@ -651,6 +651,13 @@ def _latex_adjustbox_options(self, node):
     if 'scale' in node:
         if not adjustbox_options:
             adjustbox_options.append('scale=%s' % (float(node['scale']) / 100.0))
+    if 'max-width' in node:
+        if 'scale' in node:
+            w = self.latex_image_length(node['max-width'], node['scale'])
+        else:
+            w = self.latex_image_length(node['max-width'])
+        if w:
+            adjustbox_options.append('max width=%s' % w)
     return adjustbox_options
 
 

tests/test_functional.py

@@ -309,6 +309,19 @@ def test_buildlatex_simple_height_with_tikz():
                      readfile('plantuml_fixture.tex'))
 
 
+@with_runsphinx('latex', plantuml_latex_output_format='tikz')
+def test_buildlatex_simple_max_width_with_tikz():
+    """Generate simple LaTeX with TikZ
+
+    .. uml::
+       :max-width: 50mm
+
+       Hello
+    """
+    assert re.search(br'\\adjustbox\{max width=50mm\}\{\\input\{+plantuml-',
+                     readfile('plantuml_fixture.tex'))
+
+
 @with_runsphinx('latex', plantuml_latex_output_format='pdf')
 def test_buildlatex_simple_with_pdf():
     """Generate simple LaTeX with PDF