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ClangCodeModel: Improve ifdef'ed out code handling with clangd

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- Made code more self-documenting.
- Added more comments.
- Added debug output.
- Rewrote ugly redundant code checking for #ifdef & friends.
- For consistency, emit update about ifdef'ed code only
  if we also report the other highlighting results.

Change-Id: Idd3cbd3c169343bcaf6b6b19330130378ac6c5d0
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: David Schulz <david.schulz@qt.io>
This commit is contained in:
Christian Kandeler
2022-02-10 15:11:18 +01:00
parent 07506ab695
commit 7123a41c1e
1 changed files with 35 additions and 20 deletions
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55
src/plugins/clangcodemodel/clangdclient.cpp
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@@ -2575,7 +2575,8 @@ static QList<BlockRange> cleanupDisabledCode(HighlightingResults &results, const
int rangeStartPos = -1;
for (auto it = results.begin(); it != results.end();) {
const bool wasIfdefedOut = rangeStartPos != -1;
if (it->textStyles.mainStyle != C_DISABLED_CODE) {
const bool isIfDefedOut = it->textStyles.mainStyle == C_DISABLED_CODE;
if (!isIfDefedOut) {
if (wasIfdefedOut) {
const QTextBlock block = doc->findBlockByNumber(it->line - 1);
ifdefedOutRanges << BlockRange(rangeStartPos, block.position());
@@ -2587,19 +2588,28 @@ static QList<BlockRange> cleanupDisabledCode(HighlightingResults &results, const
if (!wasIfdefedOut)
rangeStartPos = doc->findBlockByNumber(it->line - 1).position();
const int pos = Utils::Text::positionInText(doc, it->line, it->column);
const QStringView content = subViewLen(docContent, pos, it->length).trimmed();
if (!content.startsWith(QLatin1String("#if"))
&& !content.startsWith(QLatin1String("#elif"))
&& !content.startsWith(QLatin1String("#else"))
&& !content.startsWith(QLatin1String("#endif"))) {
static const QStringList ppSuffixes{"if", "ifdef", "elif", "else", "endif"};
const QList<QStringView> contentList = content.split(' ', Qt::SkipEmptyParts);
if (contentList.size() < 2 || contentList.first() != QLatin1String("#")
|| !ppSuffixes.contains(contentList.at(1))) {
++it;
continue;
}
// Does the current line contain a potential "ifdefed-out switcher"?
// If not, no state change is possible and we continue with the next line.
const auto isPreprocessorControlStatement = [&] {
const int pos = Utils::Text::positionInText(doc, it->line, it->column);
const QStringView content = subViewLen(docContent, pos, it->length).trimmed();
if (content.isEmpty() || content.first() != '#')
return false;
int offset = 1;
while (offset < content.size() && content.at(offset).isSpace())
++offset;
if (offset == content.size())
return false;
const QStringView ppDirective = content.mid(offset);
return ppDirective.startsWith(QLatin1String("if"))
|| ppDirective.startsWith(QLatin1String("elif"))
|| ppDirective.startsWith(QLatin1String("else"))
|| ppDirective.startsWith(QLatin1String("endif"));
};
if (!isPreprocessorControlStatement()) {
++it;
continue;
}
if (!wasIfdefedOut) {
@@ -2626,6 +2636,12 @@ static QList<BlockRange> cleanupDisabledCode(HighlightingResults &results, const
if (rangeStartPos != -1)
ifdefedOutRanges << BlockRange(rangeStartPos, doc->characterCount());
qCDebug(clangdLogHighlight) << "found" << ifdefedOutRanges.size() << "ifdefed-out ranges";
if (clangdLogHighlight().isDebugEnabled()) {
for (const BlockRange &r : qAsConst(ifdefedOutRanges))
qCDebug(clangdLogHighlight) << r.first() << r.last();
}
return ifdefedOutRanges;
}
@@ -2785,13 +2801,13 @@ static void semanticHighlighter(QFutureInterface<HighlightingResult> &future,
auto results = QtConcurrent::blockingMapped<HighlightingResults>(tokens, toResult);
const QList<BlockRange> ifdefedOutBlocks = cleanupDisabledCode(results, &doc, docContents);
QMetaObject::invokeMethod(textDocument, [textDocument, ifdefedOutBlocks, docRevision] {
if (textDocument && textDocument->document()->revision() == docRevision)
textDocument->setIfdefedOutBlocks(ifdefedOutBlocks);
}, Qt::QueuedConnection);
ExtraHighlightingResultsCollector(future, results, filePath, ast, &doc, docContents).collect();
if (!future.isCanceled()) {
qCDebug(clangdLog) << "reporting" << results.size() << "highlighting results";
QMetaObject::invokeMethod(textDocument, [textDocument, ifdefedOutBlocks, docRevision] {
if (textDocument && textDocument->document()->revision() == docRevision)
textDocument->setIfdefedOutBlocks(ifdefedOutBlocks);
}, Qt::QueuedConnection);
QList<Range> virtualRanges;
for (const HighlightingResult &r : results) {
if (r.textStyles.mainStyle != C_VIRTUAL_METHOD)
@@ -2806,8 +2822,7 @@ static void semanticHighlighter(QFutureInterface<HighlightingResult> &future,
client->setVirtualRanges(filePath, virtualRanges, docRevision);
}
}, Qt::QueuedConnection);
future.reportResults(QVector<HighlightingResult>(results.cbegin(),
results.cend()));
future.reportResults(QVector<HighlightingResult>(results.cbegin(), results.cend()));
}
future.reportFinished();
}