From d6128e69375a7c3506624cb2d6ac04c8ae5b2833 Mon Sep 17 00:00:00 2001
From: "James R. Barlow" <james@purplerock.ca>
Date: Sun, 26 Jul 2020 21:51:25 -0700
Subject: [PATCH] Fix support for older versions of pdfminer.six (boxes_flow
 error)

---
 src/ocrmypdf/pdfinfo/layout.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/ocrmypdf/pdfinfo/layout.py b/src/ocrmypdf/pdfinfo/layout.py
index 98bd82e0..7cd0b57e 100644
--- a/src/ocrmypdf/pdfinfo/layout.py
+++ b/src/ocrmypdf/pdfinfo/layout.py
@@ -220,8 +220,16 @@ class TextPositionTracker(PDFLayoutAnalyzer):
 
 def get_page_analysis(infile, pageno, pscript5_mode):
     rman = pdfminer.pdfinterp.PDFResourceManager(caching=True)
+    if pdfminer.__version__ < '20200402':
+        # Workaround for https://github.com/pdfminer/pdfminer.six/issues/395
+        disable_boxes_flow = 2
+    else:
+        disable_boxes_flow = None
     dev = TextPositionTracker(
-        rman, laparams=LAParams(all_texts=True, detect_vertical=True, boxes_flow=None)
+        rman,
+        laparams=LAParams(
+            all_texts=True, detect_vertical=True, boxes_flow=disable_boxes_flow
+        ),
     )
     interp = pdfminer.pdfinterp.PDFPageInterpreter(rman, dev)