Use empty .hocr file instead of dummy template for symmetry with sandwich

2023-10-24 00:54:31 -07:00
parent ad3a1dbbad
commit 7935914f55
3 changed files with 8 additions and 25 deletions
@@ -26,25 +26,6 @@ from ocrmypdf.subprocess import get_version, run
 log = logging.getLogger(__name__)


-HOCR_TEMPLATE = """<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
-    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
- <head>
-  <title></title>
-<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
-  <meta name='ocr-system' content='tesseract 4.1.1' />
-  <meta name='ocr-capabilities'
-    content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_wconf'/>
-</head>
-<body>
-  <div class='ocr_page' id='page_1'
-    title='image "_blank.png"; bbox 0 0 {0} {1}; ppageno 0'>
-  </div>
- </body>
-</html>
-"""
-
 TESSERACT_THRESHOLDING_METHODS: dict[str, int] = {
    'auto': 0,
    'otsu': 0,
@@ -284,14 +265,11 @@ def page_timedout(timeout: float) -> None:


 def _generate_null_hocr(output_hocr: Path, output_text: Path, image: Path) -> None:
-    """Produce a .hocr file that reports no text detected.
+    """Produce an empty .hocr file.

    Ensures page is the same size as the input image.
    """
-    with Image.open(image) as im:
-        w, h = im.size
-
-    output_hocr.write_text(HOCR_TEMPLATE.format(w, h), encoding='utf-8')
+    output_hocr.write_text('', encoding='utf-8')
    output_text.write_text('[skipped page]', encoding='utf-8')


@@ -734,6 +734,11 @@ def render_hocr_page(hocr: Path, page_context: PageContext) -> Path:
    """Render the hOCR page to a PDF."""
    options = page_context.options
    output_file = page_context.get_path('ocr_hocr.pdf')
+    if hocr.stat().st_size == 0:
+        # If hOCR file is empty (skipped page marker), create an empty PDF file
+        output_file.touch()
+        return output_file
+
    dpi = get_page_square_dpi(page_context, calculate_image_dpi(page_context))
    debug_mode = options.pdf_renderer == 'hocrdebug'

@@ -86,7 +86,7 @@ def test_image_too_large_hocr(monkeypatch, resources, outdir):
        user_words=None,
        user_patterns=None,
    )
-    assert "name='ocr-capabilities'" in Path(outdir / 'out.hocr').read_text()
+    assert Path(outdir / 'out.hocr').read_text() == ''


 def test_image_too_large_pdf(monkeypatch, resources, outdir):