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Fix: QTextDocument::find backward search crossing paragraphs

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If the start position of a backward string search was the at the start
of a paragraph, the code would start searching at an illegal position
(at the eol character) in the preceding paragraph. That caused
that whole paragraph to be skipped, so any matches there
would not be found. Fix by making sure the search starts at legal
position.

Fixes: QTBUG-48035
Change-Id: Id6c0159b6613ec75ec617a0a57096ceef2b4cbd0
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
This commit is contained in:
Eirik Aavitsland 2019-06-03 14:45:07 +02:00
parent 7fc67e09f3
commit a4f79313f0
2 changed files with 11 additions and 0 deletions
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2
src/gui/text/qtextdocument.cpp
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@ -1358,6 +1358,8 @@ QTextCursor QTextDocument::find(const QString &subString, int from, FindFlags op
blockOffset = 0;
}
} else {
if (blockOffset == block.length() - 1)
--blockOffset; // make sure to skip end-of-paragraph character
while (block.isValid()) {
if (findInBlock(block, subString, blockOffset, options, &cursor))
return cursor;

9
tests/auto/gui/text/qtextdocument/tst_qtextdocument.cpp
View File

@ -319,6 +319,15 @@ void tst_QTextDocument::find_data()
QTest::newRow("nbsp") << "Hello" + QString(QChar(QChar::Nbsp)) +"World" << " " << int(QTextDocument::FindCaseSensitively) << 0 << 5 << 6;
QTest::newRow("from-the-end") << "Hello World" << "Hello World" << int(QTextDocument::FindCaseSensitively| QTextDocument::FindBackward) << 11 << 0 << 11;
QTest::newRow("bw-cross-paras-1") << "a1\na2\nb1" << "a" << int(QTextDocument::FindBackward) << 7 << 3 << 4;
QTest::newRow("bw-cross-paras-2") << "a1\na2\nb1" << "a" << int(QTextDocument::FindBackward) << 6 << 3 << 4;
QTest::newRow("bw-cross-paras-3") << "a1\na2\nb1" << "a" << int(QTextDocument::FindBackward) << 5 << 3 << 4;
QTest::newRow("bw-cross-paras-4") << "a1\na2\nb1" << "a" << int(QTextDocument::FindBackward) << 3 << 0 << 1;
QTest::newRow("bw-cross-paras-5") << "xa\n\nb1" << "a" << int(QTextDocument::FindBackward) << 5 << 1 << 2;
QTest::newRow("bw-cross-paras-6") << "xa\n\nb1" << "a" << int(QTextDocument::FindBackward) << 4 << 1 << 2;
QTest::newRow("bw-cross-paras-7") << "xa\n\nb1" << "a" << int(QTextDocument::FindBackward) << 3 << 1 << 2;
QTest::newRow("bw-cross-paras-8") << "xa\n\nb1" << "a" << int(QTextDocument::FindBackward) << 2 << 1 << 2;
}
void tst_QTextDocument::find()