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injectCrossRefLinks() drew each link as it found it: the contacts of a cross-reference come from a QMultiMap keyed by Element pointer, and the scene's items in stacking order. Both change from run to run, so the same project exported twice gave two different PDFs whose only difference was the order of the link annotations. The links are now collected and drawn sorted by their rectangle on the page (top, left, bottom, right), with the target as the tie-break. The links themselves are unchanged. The print window's PDF export goes through the same function. tst_pdflinkorder exports examples/industrial.qet five times in separate processes and requires the same links in the same order. It fails on the old code (lists differ at index 2). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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--export-pdf writes a project's cross-reference links in the same order
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every time. They used to come out in the order of Element pointers, so
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the same project gave a different PDF in each run. Exported in separate
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processes, since pointers only change between runs.
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*/
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#include <QDir>
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#include <QFile>
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#include <QProcess>
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#include <QRegularExpression>
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#include <QTemporaryDir>
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#include <QtTest>
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class tst_pdflinkorder : public QObject
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{
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Q_OBJECT
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QTemporaryDir m_dir;
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// The link annotations' rectangles and destinations, in file order.
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QStringList exportLinks(const QString &project, int run)
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{
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const QString home = m_dir.filePath(QStringLiteral("home%1").arg(run));
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const QString tmp = m_dir.filePath(QStringLiteral("tmp%1").arg(run));
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const QString out = m_dir.filePath(QStringLiteral("out%1.pdf").arg(run));
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QDir().mkpath(home);
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QDir().mkpath(tmp);
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QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
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env.insert(QStringLiteral("QT_QPA_PLATFORM"), QStringLiteral("offscreen"));
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env.insert(QStringLiteral("HOME"), home);
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env.insert(QStringLiteral("XDG_CONFIG_HOME"), home + QStringLiteral("/.config"));
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env.insert(QStringLiteral("XDG_DATA_HOME"), home + QStringLiteral("/.local/share"));
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env.insert(QStringLiteral("TMPDIR"), tmp);
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QProcess proc;
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proc.setProcessEnvironment(env);
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proc.start(QStringLiteral(QET_TEST_BINARY_PATH),
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{QStringLiteral("--export-pdf"), project, out});
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if (!proc.waitForFinished(120000) || proc.exitCode() != 0)
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return {};
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QFile file(out);
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if (!file.open(QIODevice::ReadOnly))
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return {};
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const QString pdf = QString::fromLatin1(file.readAll());
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static const QRegularExpression link(QStringLiteral(
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R"(/Subtype /Link\s*/Rect \[([^\]]*)\][\s\S]*?/D \[\d+ 0 R ([^\]]*)\])"));
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QStringList links;
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auto it = link.globalMatch(pdf);
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while (it.hasNext()) {
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const auto m = it.next();
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links << m.captured(1).simplified() + QStringLiteral(" -> ")
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+ m.captured(2).simplified();
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}
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return links;
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}
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private slots:
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void initTestCase()
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{
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QVERIFY(m_dir.isValid());
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QVERIFY(QFile::exists(QStringLiteral(QET_TEST_BINARY_PATH)));
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}
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void sameOrderEveryRun()
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{
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const QString project =
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QStringLiteral(QET_EXAMPLES_DIR) + QStringLiteral("/industrial.qet");
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QVERIFY2(QFile::exists(project), "examples/industrial.qet not found");
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const QStringList first = exportLinks(project, 0);
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QVERIFY2(first.size() >= 2, "expected several cross-reference links");
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for (int run = 1; run < 5; ++run)
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QCOMPARE(exportLinks(project, run), first);
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}
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};
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QTEST_MAIN(tst_pdflinkorder)
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#include "tst_pdflinkorder.moc"
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