Support rowspans taller than one page (#1460)

repro_tablespan.py

@@ -0,0 +1,19 @@
+from fpdf import FPDF
+from fpdf.enums import TableSpan
+
+pdf = FPDF()
+
+pdf.auto_page_break = True
+pdf.set_font("Arial", size=12)
+pdf.add_page()
+
+data = [
+    ["Header 1", "Header 2", "Header 3"],
+    ["Data 1", "Data 2", "Data 3"],
+] + [[TableSpan.ROW, "Data 5", "Data 6"]] * 30 #this seems to be the threshold -> 32 rows of this size
+
+with pdf.table(data) as table:
+    pass
+
+pdf.output("overly_long_tablespan.pdf")
+print("Wrote overly_long_tablespan.pdf")

test/table/test_table_rowspan.py

@@ -1,9 +1,9 @@
 from pathlib import Path
 
 from fpdf import FPDF, FontFace
-from fpdf.enums import TableSpan
+from fpdf.enums import TableHeadingsDisplay, TableSpan
 
-from test.conftest import assert_pdf_equal
+from test.conftest import LOREM_IPSUM, assert_pdf_equal
 
 HERE = Path(__file__).resolve().parent
 IMG_DIR = HERE.parent / "image"
@@ -223,6 +223,77 @@ def test_table_with_rowspan_and_pgbreak(tmp_path):
     assert_pdf_equal(pdf, HERE / "table_with_rowspan_and_pgbreak.pdf", tmp_path)
 
 
+#helper function for issue #1460 data
+def _issue_1460_table_data(span_extra_rows: int = 30):
+    """Minimal data from issue #1460 (rowspan via TableSpan.ROW)."""
+    return [
+        ["Header 1", "Header 2", "Header 3"],
+        ["Data 1", "Data 2", "Data 3"],
+    ] + [[TableSpan.ROW, "Data 5", "Data 6"] for _ in range(span_extra_rows)]
+
+
+def test_table_rowspan_issue_1460_multipage(tmp_path):
+    # Issue #1460: rowspan taller than one page must render across multiple pages.
+    pdf = FPDF()
+    pdf.auto_page_break = True
+    pdf.set_font("Helvetica", size=12)
+    pdf.add_page()
+    with pdf.table(_issue_1460_table_data(30)):
+        pass
+    assert_pdf_equal(pdf, HERE / "table_rowspan_issue_1460_multipage.pdf", tmp_path)
+
+
+def test_table_rowspan_issue_1460_repeat_headings(tmp_path):
+    # Same as multipage case, but headings must repeat after each page break.
+    pdf = FPDF()
+    pdf.auto_page_break = True
+    pdf.set_font("Helvetica", size=12)
+    pdf.add_page()
+    with pdf.table(
+        _issue_1460_table_data(30),
+        repeat_headings=TableHeadingsDisplay.ON_TOP_OF_EVERY_PAGE,
+    ):
+        pass
+    assert_pdf_equal(
+        pdf, HERE / "table_rowspan_issue_1460_repeat_headings.pdf", tmp_path
+    )
+
+
+def test_table_rowspan_across_pages_merged_cell_long_text(tmp_path):
+    # Rowspan anchor cell contains enough text to overflow; span crosses page breaks.
+    long_text = (LOREM_IPSUM + "\n\n") * 2
+    data = [
+        ["Header 1", "Header 2", "Header 3"],
+        [long_text, "Col B", "Col C"],
+    ] + [[TableSpan.ROW, f"R{i}", f"R{i}"] for i in range(35)]
+    pdf = FPDF()
+    pdf.auto_page_break = True
+    pdf.set_font("Helvetica", size=12)
+    pdf.add_page()
+    with pdf.table(data):
+        pass
+    assert_pdf_equal(
+        pdf, HERE / "table_rowspan_across_pages_merged_cell_long_text.pdf", tmp_path
+    )
+
+def test_table_rowspan_issue_1460_merged_cell_long_text_no_header(tmp_path):
+    # Same as multipage case, but no header
+    long_text = (LOREM_IPSUM + "\n\n") * 2
+    data = [
+        ["Text", "Header 2", "Header 3"],
+        [long_text, "Col B", "Col C"],
+    ] + [[TableSpan.ROW, f"R{i}", f"R{i}"] for i in range(35)]
+    pdf = FPDF()
+    pdf.auto_page_break = True
+    pdf.set_font("Helvetica", size=12)
+    pdf.add_page()
+    with pdf.table(data, first_row_as_headings=False):
+        pass
+    assert_pdf_equal(
+        pdf, HERE / "table_rowspan_issue_1460_merged_cell_long_text_no_header.pdf", tmp_path
+    )
+
+
 def test_table_with_rowspan_images(tmp_path):
     # Verify that the rowspans interact correctly with pagebreaks
     pdf = FPDF()