[FIX] Replace pdfminer3k with pypdf

MANIFEST.in

@@ -1,11 +1,12 @@
 recursive-include orangecontrib/text/datasets *.tab *.txt *.metadata
 recursive-include orangecontrib/text/models *.ftz
 recursive-include orangecontrib/text/sentiment *.txt
-recursive-include orangecontrib/text/tests *.txt *.json *.pkl *.udpipe
+recursive-include orangecontrib/text/tests *.txt *.json
+recursive-include orangecontrib/text/tests/data *
 recursive-include orangecontrib/text/tutorials *.ows
 recursive-include orangecontrib/text/widgets/icons *.svg *.png *.ai
 recursive-include orangecontrib/text/widgets/resources *.js *.css *.html
-recursive-include orangecontrib/text/widgets/tests/data *.docx *.odt *.pdf *.txt *.conllu *.csv *.tab *.tab.metadata
+recursive-include orangecontrib/text/widgets/tests/data *.txt *.conllu *.csv *.tab *.tab.metadata
 include orangecontrib/text/widgets/tests/bow-test
 recursive-include scripts *.sh *.py
 

orangecontrib/text/import_documents.py

@@ -25,10 +25,7 @@
 from Orange.data.util import get_unique_names
 from Orange.misc.utils.embedder_utils import get_proxies
 from Orange.util import Registry, dummy_callback
-from pdfminer.converter import PDFPageAggregator
-from pdfminer.layout import LAParams, LTTextBox, LTTextLine
-from pdfminer.pdfinterp import PDFPageInterpreter, PDFResourceManager
-from pdfminer.pdfparser import PDFDocument, PDFParser
+from pypdf import PdfReader as PyPDFReader
 from requests.exceptions import ConnectionError
 
 from orangecontrib.text.corpus import Corpus
@@ -130,28 +127,9 @@ class PdfReader(Reader):
     ext = [".pdf"]
 
     def read_file(self):
-        with open(self.path, 'rb') as f:
-            parser = PDFParser(f)
-        doc = PDFDocument()
-        parser.set_document(doc)
-        doc.set_parser(parser)
-        doc.initialize('')
-        rsrcmgr = PDFResourceManager()
-        laparams = LAParams()
-        laparams.char_margin = 0.1
-        laparams.word_margin = 1.0
-        device = PDFPageAggregator(rsrcmgr, laparams=laparams)
-        interpreter = PDFPageInterpreter(rsrcmgr, device)
-        extracted_text = []
-
-        for page in doc.get_pages():
-            interpreter.process_page(page)
-            layout = device.get_result()
-            for lt_obj in layout:
-                if isinstance(lt_obj, LTTextBox) or isinstance(lt_obj,
-                                                               LTTextLine):
-                    extracted_text.append(lt_obj.get_text())
-        self.content = ' '.join(extracted_text).replace('\x00', '')
+        reader = PyPDFReader(self.path)
+        texts = [page.extract_text() for page in reader.pages]
+        self.content = " ".join(texts)
 
 
 class XmlReader(Reader):

orangecontrib/text/tests/test_import_documents.py

@@ -16,6 +16,7 @@
     TxtReader,
     TextData,
     XmlReader,
+    PdfReader,
 )
 
 
@@ -296,5 +297,36 @@ def test_error(self):
         os.remove(fp.name)
 
 
+DATA_PATH = os.path.join(os.path.dirname(__file__), "data", "documents")
+
+
+class TestPdfReader(unittest.TestCase):
+    def test_file(self):
+        reader = PdfReader(os.path.join(DATA_PATH, "good", "minimal-document.pdf"))
+        res = reader.read()[0]
+        exp = (
+            "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam "
+            "nonumy eirmod"
+        )
+        self.assertTrue(res.content.startswith(exp))
+
+        path = os.path.join(DATA_PATH, "good", "sample_pdf.pdf")
+        reader = PdfReader(path)
+        res = reader.read()[0]
+        self.assertEqual("This is a test pdf file", res.content)
+        self.assertEqual("sample_pdf", res.name)
+        self.assertEqual(os.path.join(path), res.path)
+        self.assertListEqual([".pdf"], res.ext)
+        self.assertEqual("good", res.category)
+
+    def test_error(self):
+        reader = PdfReader(
+            os.path.join(DATA_PATH, "corrupted", "sample_pdf_corrupted.pdf")
+        )
+        res = reader.read()
+        self.assertIsNone(res[0])
+        self.assertEqual("sample_pdf_corrupted.pdf", res[1])
+
+
 if __name__ == "__main__":
     unittest.main()

orangecontrib/text/widgets/tests/test_owimportdocuments.py

@@ -8,37 +8,49 @@
 from orangecontrib.text.widgets.owimportdocuments import OWImportDocuments
 
 
+DATA_PATH = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), "..", "..", "tests", "data", "documents")
+)
+
+
 class TestOWImportDocuments(WidgetTest):
     def setUp(self) -> None:
         self.widget: OWImportDocuments = self.create_widget(OWImportDocuments)
-        path = os.path.join(os.path.dirname(__file__), "data/documents")
+        path = os.path.join(os.path.dirname(__file__), DATA_PATH)
         self.widget.setCurrentPath(path)
         self.widget.reload()
         self.wait_until_finished()
 
     def test_current_path(self):
-        path = os.path.join(os.path.dirname(__file__), "data/documents")
+        path = os.path.join(os.path.dirname(__file__), DATA_PATH)
         self.assertEqual(path, self.widget.currentPath)
 
     def test_no_skipped(self):
-        path = os.path.join(os.path.dirname(__file__), "data/documents", "good")
+        path = os.path.join(DATA_PATH, "good")
         self.widget.setCurrentPath(path)
         self.widget.reload()
         self.wait_until_finished()
         self.assertIsNone(self.get_output(self.widget.Outputs.skipped_documents))
 
     def test_output(self):
         output = self.get_output(self.widget.Outputs.data)
-        self.assertEqual(4, len(output))
+        self.assertEqual(5, len(output))
         self.assertEqual(3, len(output.domain.metas))
         names = output.get_column("name")
         self.assertListEqual(
             # ž in sample_text_ž must be unicode char 0x17E not decomposed
             # 0x7A + 0x30C as it is in file name
-            ["sample_docx", "sample_odt", "sample_pdf", "sample_txt_ž"],
+            [
+                "minimal-document",
+                "sample_docx",
+                "sample_odt",
+                "sample_pdf",
+                "sample_txt_ž",
+            ],
             sorted(names.tolist()),
         )
-        texts = output.get_column("content")
+        # skip first document - it contains different text
+        texts = output.get_column("content")[1:]
         self.assertListEqual(
             # ž in sample_text_ž must be unicode char 0x17E not decomposed
             # 0x7A + 0x30C as it is in file name
@@ -99,9 +111,7 @@ def test_conllu_cb(self):
         self.assertEqual(len(corpus.domain.metas), 4)
 
     def test_info_box(self):
-        self.assertEqual(
-            "4 documents, 1 skipped", self.widget.info_area.text()
-        )
+        self.assertEqual("5 documents, 1 skipped", self.widget.info_area.text())
 
         # empty widget
         self.widget: OWImportDocuments = self.create_widget(OWImportDocuments)
@@ -124,7 +134,7 @@ def tests_context(self):
         # change default to something else to see if language is changed
         self.widget.language = "Slovenian"
 
-        path = os.path.join(os.path.dirname(__file__), "data/documents", "good")
+        path = os.path.join(DATA_PATH, "good")
         self.widget.setCurrentPath(path)
         self.widget.reload()
         self.wait_until_finished()

requirements.txt

@@ -15,7 +15,7 @@ orange-widget-base >=4.20.0
 orange-canvas-core
 owlready2
 pandas
-pdfminer3k>=1.3.1
+pypdf
 pyqtgraph
 pyyaml
 requests