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import sys
import pytest
from pikepdf import (
parse_content_stream, Pdf, Stream, Operator, Object,
Dictionary
)
from pikepdf.models import Page
from pikepdf._qpdf import StreamParser
from subprocess import run, PIPE
import shutil
# pylint: disable=useless-super-delegation
class PrintParser(StreamParser):
def __init__(self):
super().__init__()
def handle_object(self, obj):
print(repr(obj))
def handle_eof(self):
print("--EOF--")
class ExceptionParser(StreamParser):
def __init__(self):
super().__init__()
def handle_object(self, obj): # pylint: disable=unused-argument
raise ValueError("I take exception to this")
def handle_eof(self):
print("--EOF--")
def test_open_pdf(resources):
pdf = Pdf.open(resources / 'graph.pdf')
page = pdf.pages[0]
Object._parse_stream(page, PrintParser())
def test_parser_exception(resources):
pdf = Pdf.open(resources / 'graph.pdf')
stream = pdf.pages[0]['/Contents']
with pytest.raises(ValueError):
Object._parse_stream(stream, ExceptionParser())
@pytest.mark.skipif(
shutil.which('pdftotext') is None,
reason="poppler not installed")
def test_text_filter(resources, outdir):
input_pdf = resources / 'veraPDF test suite 6-2-10-t02-pass-a.pdf'
# Ensure the test PDF has detect we can find
proc = run(['pdftotext', str(input_pdf), '-'],
check=True, stdout=PIPE, encoding='utf-8')
assert proc.stdout.strip() != '', "Need input test file that contains text"
pdf = Pdf.open(input_pdf)
page = pdf.pages[0]
keep = []
for operands, command in parse_content_stream(page):
if command == Operator('Tj'):
print("skipping Tj")
continue
keep.append((operands, command))
new_stream = Stream(pdf, keep)
print(new_stream.read_bytes()) # pylint: disable=no-member
page['/Contents'] = new_stream
page['/Rotate'] = 90
pdf.save(outdir / 'notext.pdf', True)
proc = run(['pdftotext', str(outdir / 'notext.pdf'), '-'],
check=True, stdout=PIPE, encoding='utf-8')
assert proc.stdout.strip() == '', "Expected text to be removed"
def test_invalid_stream_object():
with pytest.raises(TypeError):
parse_content_stream(Dictionary({"/Hi": 3}))
@pytest.mark.parametrize("test_file,expected", [
("fourpages.pdf", True),
("graph.pdf", False),
("veraPDF test suite 6-2-10-t02-pass-a.pdf", True),
("veraPDF test suite 6-2-3-3-t01-fail-c.pdf", False),
('sandwich.pdf', True)
])
def test_has_text(resources, test_file, expected):
pdf = Pdf.open(resources / test_file)
for p in pdf.pages:
page = Page(p)
assert page.has_text() == expected
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