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f66643d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 | """Regression tests for arbitrary page-range rendering + output-only-translated.
The render layer used to conflate the compacted-list enumerate index with the
original page number, so any range not starting at page 0 silently rendered
nothing. These tests pin the fixed behavior:
- a range like [2, 3, 4] (not starting at 0) renders correctly, and
- the output PDF contains ONLY the translated pages, in order.
"""
import shutil
import sys
from pathlib import Path
import fitz
import pytest
sys.path.insert(0, str(Path(__file__).parent.parent))
from pdf2zh.render.config import RenderConfig
from pdf2zh.render.renderer import render_document
TYPST = shutil.which("typst")
def _make_pdf(path: Path, n_pages: int) -> None:
doc = fitz.open()
for i in range(n_pages):
page = doc.new_page(width=300, height=200)
page.insert_text((20, 40), f"Original page {i} native text")
doc.save(str(path))
doc.close()
def _compacted_parsed(page_indices: list[int]) -> dict:
"""A parsed doc compacted to `page_indices` (mirrors parse_pdf(pages=...))."""
return {
"pages": [
{
"page_index": pi,
"page_width": 300,
"page_height": 200,
"elements": [
{
"category": "FLOWING_TEXT",
"label": "Text",
"bbox_pdf": [20, 30, 280, 55],
"source_text": f"Original page {pi} native text",
"translated_text": f"Trang dịch số {pi}",
}
],
}
for pi in page_indices
]
}
@pytest.mark.skipif(TYPST is None, reason="typst binary not installed")
class TestArbitraryPageRange:
def test_midrange_renders_and_outputs_only_selected(self, tmp_path):
pdf_path = tmp_path / "src.pdf"
_make_pdf(pdf_path, n_pages=6)
pages = [2, 3, 4] # 0-based, NOT starting at 0
parsed = _compacted_parsed(pages)
cfg = RenderConfig(typst_binary=TYPST)
cfg.pages = pages
out_pdf = tmp_path / "out.pdf"
stats = render_document(pdf_path, parsed, out_pdf, cfg)
# Rendered all 3 selected pages (the pre-fix bug rendered 0).
assert stats["pages"] == 3
assert stats["elements_rendered"] == 3
# Output contains ONLY the translated pages, not the full 6-page doc.
out = fitz.open(str(out_pdf))
try:
assert out.page_count == 3
# Translated text present; the out-of-range page-0 text must be gone.
assert "Trang dịch số 2" in out[0].get_text()
assert "Original page 0" not in out[0].get_text()
finally:
out.close()
def test_pages_none_keeps_all_pages(self, tmp_path):
pdf_path = tmp_path / "src.pdf"
_make_pdf(pdf_path, n_pages=3)
parsed = _compacted_parsed([0, 1, 2])
cfg = RenderConfig(typst_binary=TYPST)
cfg.pages = None # translate whole document
out_pdf = tmp_path / "out.pdf"
render_document(pdf_path, parsed, out_pdf, cfg)
out = fitz.open(str(out_pdf))
try:
assert out.page_count == 3
finally:
out.close()
_PARA = (
"This paragraph is long enough in the source that autofit picks a modest "
"font size and the box is treated as multi line rather than single line."
)
_LONG = _PARA + " " + _PARA + " " + _PARA # translated overflows the tight box
def _para_span_stats(pdf: Path):
doc = fitz.open(str(pdf))
try:
sizes, bottoms = [], []
for b in doc[0].get_text("dict")["blocks"]:
for line in b.get("lines", []):
for s in line["spans"]:
if "paragraph" in s["text"] or "multi" in s["text"]:
sizes.append(s["size"])
bottoms.append(s["bbox"][3])
return (max(sizes) if sizes else 0.0), (max(bottoms) if bottoms else 0.0)
finally:
doc.close()
@pytest.mark.skipif(TYPST is None, reason="typst binary not installed")
class TestCollisionAwareSizing:
"""Text keeps its size and overflows into empty space, but shrinks to avoid
colliding with a neighbor below (mirrors the sizing heuristic)."""
def _render(self, tmp_path, with_neighbor):
pdf_path = tmp_path / f"src_{with_neighbor}.pdf"
doc = fitz.open()
doc.new_page(width=400, height=400)
doc.save(str(pdf_path))
doc.close()
els = [
{
"label": "Text",
"category": "FLOWING_TEXT",
"bbox_pdf": [40, 40, 360, 110],
"source_text": _PARA,
"translated_text": _LONG,
"cells": [],
}
]
if with_neighbor:
els.append(
{
"label": "Text",
"category": "FLOWING_TEXT",
"bbox_pdf": [40, 116, 360, 150],
"source_text": "N",
"translated_text": "Neighbor line",
"cells": [],
}
)
parsed = {
"pages": [
{
"page_index": 0,
"page_width": 400,
"page_height": 400,
"elements": els,
}
]
}
out = tmp_path / f"out_{with_neighbor}.pdf"
render_document(pdf_path, parsed, out, RenderConfig(typst_binary=TYPST))
return _para_span_stats(out)
def test_no_neighbor_keeps_larger_size_and_overflows_down(self, tmp_path):
size_free, bottom_free = self._render(tmp_path, with_neighbor=False)
size_near, _ = self._render(tmp_path, with_neighbor=True)
# Empty space below → keeps a bigger font than when a neighbor forces a shrink.
assert size_free > size_near + 0.5
# And the text is allowed to overflow below the tight bbox (y1 = 110).
assert bottom_free > 110
_LONG_TITLE = (
"A very long translated chapter title that would run past the page number "
"column if it were allowed to expand all the way to the right page margin"
)
def _title_right_edge(self, tmp_path, with_number):
pdf_path = tmp_path / f"toc_{with_number}.pdf"
doc = fitz.open()
doc.new_page(width=595, height=842)
doc.save(str(pdf_path))
doc.close()
els = [
{
"label": "Text",
"category": "FLOWING_TEXT",
"bbox_pdf": [80, 40, 290, 56], # single-line title
"source_text": "Short",
"translated_text": self._LONG_TITLE,
"cells": [],
}
]
if with_number:
els.append(
{
"label": "Text",
"category": "FLOWING_TEXT",
"bbox_pdf": [527, 40, 543, 53], # page number, same row
"source_text": "ii",
"translated_text": "ii",
"cells": [],
}
)
parsed = {
"pages": [
{
"page_index": 0,
"page_width": 595,
"page_height": 842,
"elements": els,
}
]
}
out = tmp_path / f"toc_out_{with_number}.pdf"
render_document(pdf_path, parsed, out, RenderConfig(typst_binary=TYPST))
doc = fitz.open(str(out))
try:
right = 0.0
for b in doc[0].get_text("dict")["blocks"]:
for line in b.get("lines", []):
for s in line["spans"]:
if s["text"].strip() != "ii":
right = max(right, s["bbox"][2])
return right
finally:
doc.close()
def test_single_line_title_stops_before_right_neighbor(self, tmp_path):
with_num = self._title_right_edge(tmp_path, with_number=True)
without_num = self._title_right_edge(tmp_path, with_number=False)
# With a page number on the right, the title must not overrun its left edge.
assert with_num <= 527.5
# Without it, the title is free to use the rest of the page width.
assert without_num > with_num
class TestColorOverride:
"""User-added boxes may carry explicit bg/text colors (review.add_element)."""
def test_sample_colors_honors_element_overrides(self, tmp_path):
from pdf2zh.render.renderer import _sample_colors
pdf = tmp_path / "p.pdf"
_make_pdf(pdf, 1)
parsed = {
"pages": [
{
"page_index": 0,
"page_width": 300,
"page_height": 200,
"elements": [
{
"category": "FLOWING_TEXT",
"label": "Text",
"bbox_pdf": [20, 30, 120, 55],
"source_text": "x",
"translated_text": "y",
"bg_color": [10, 20, 30],
"text_color": [200, 100, 50],
}
],
}
]
}
bg_colors: dict = {}
text_colors: dict = {}
stats = {"bg_samples": 0}
_sample_colors(pdf, parsed, RenderConfig(), {}, bg_colors, text_colors, stats)
# Override used verbatim — no sampling from the page pixels.
assert bg_colors["p0:e0"] == (10, 20, 30)
assert text_colors["p0:e0"] == (200, 100, 50)
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