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Look both forward and backward for auto-determining spaces vs tabs

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This commit is contained in:
Roopesh Chander
2009-10-31 15:29:30 +05:30
committed by Thorbjørn Lindeijer
parent 9822fb65df
commit bf2289127f
2 changed files with 21 additions and 14 deletions
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31
src/plugins/texteditor/tabsettings.cpp
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@@ -231,19 +231,26 @@ int TabSettings::indentedColumn(int column, bool doIndent) const
bool TabSettings::guessSpacesForTabs(const QTextBlock& _block) const {
if (m_autoSpacesForTabs && _block.isValid()) {
QTextBlock block = _block;
const QTextDocument* doc = block.document();
int maxLookBack = 100;
while (block.isValid() && block != doc->begin() && maxLookBack-- > 0) {
block = block.previous();
if (block.text().isEmpty())
continue;
QChar firstChar = block.text().at(0);
if (firstChar == QLatin1Char(' ')) {
return true;
} else if (firstChar == QLatin1Char('\t')) {
return false;
QVector<QTextBlock> currentBlocks(2, _block); // [0] looks back; [1] looks forward
int maxLookAround = 100;
while (maxLookAround-- > 0) {
currentBlocks[0] = currentBlocks.at(0).previous();
currentBlocks[1] = currentBlocks.at(1).next();
bool done = true;
foreach(QTextBlock block, currentBlocks) {
if (block.isValid())
done = false;
if (!block.isValid() || block.text().isEmpty())
continue;
QChar firstChar = block.text().at(0);
if (firstChar == QLatin1Char(' ')) {
return true;
} else if (firstChar == QLatin1Char('\t')) {
return false;
}
}
if (done)
break;
}
}
return m_spacesForTabs;