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Editor: Improve splitting format range performance

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Instead of copying the list and move some items individualy from
one list to the other use Utils::partition.

Fixes: QTCREATORBUG-23281
Change-Id: Iaf9430c041aa916feecf9214303ba30f17290ba8
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
This commit is contained in:
David Schulz
2019-11-28 13:03:32 +01:00
parent c522ceb7dd
commit e85d6b363b
1 changed files with 21 additions and 29 deletions
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50
src/plugins/texteditor/syntaxhighlighter.cpp
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@@ -78,13 +78,13 @@ public:
bool noAutomaticHighlighting = false;
};
static bool adjustRange(QTextLayout::FormatRange &range, int from, int charsRemoved, int charsAdded) {
static bool adjustRange(QTextLayout::FormatRange &range, int from, int charsDelta)
{
if (range.start >= from) {
range.start += charsAdded - charsRemoved;
range.start += charsDelta;
return true;
} else if (range.start + range.length > from) {
range.length += charsAdded - charsRemoved;
range.length += charsDelta;
return true;
}
return false;
@@ -105,32 +105,24 @@ void SyntaxHighlighterPrivate::applyFormatChanges(int from, int charsRemoved, in
QTextLayout *layout = currentBlock.layout();
QVector<QTextLayout::FormatRange> ranges = layout->formats();
QVector<QTextLayout::FormatRange> ranges;
QVector<QTextLayout::FormatRange> oldRanges;
std::tie(ranges, oldRanges)
= Utils::partition(layout->formats(), [](const QTextLayout::FormatRange &range) {
return range.format.property(QTextFormat::UserProperty).toBool();
});
bool doAdjustRange = currentBlock.contains(from);
QVector<QTextLayout::FormatRange> old_ranges;
if (!ranges.isEmpty()) {
auto it = ranges.begin();
while (it != ranges.end()) {
if (it->format.property(QTextFormat::UserProperty).toBool()) {
if (doAdjustRange)
formatsChanged = adjustRange(*it, from - currentBlock.position(), charsRemoved, charsAdded)
|| formatsChanged;
++it;
} else {
old_ranges.append(*it);
it = ranges.erase(it);
}
}
if (currentBlock.contains(from)) {
const int charsDelta = charsAdded - charsRemoved;
for (QTextLayout::FormatRange &range : ranges)
formatsChanged |= adjustRange(range, from - currentBlock.position(), charsDelta);
}
QTextCharFormat emptyFormat;
QTextLayout::FormatRange r;
QVector<QTextLayout::FormatRange> new_ranges;
QVector<QTextLayout::FormatRange> newRanges;
int i = 0;
while (i < formatChanges.count()) {
@@ -148,19 +140,19 @@ void SyntaxHighlighterPrivate::applyFormatChanges(int from, int charsRemoved, in
r.length = i - r.start;
new_ranges << r;
newRanges << r;
}
formatsChanged = formatsChanged || (new_ranges.size() != old_ranges.size());
formatsChanged = formatsChanged || (newRanges.size() != oldRanges.size());
for (int i = 0; !formatsChanged && i < new_ranges.size(); ++i) {
const QTextLayout::FormatRange &o = old_ranges.at(i);
const QTextLayout::FormatRange &n = new_ranges.at(i);
for (int i = 0; !formatsChanged && i < newRanges.size(); ++i) {
const QTextLayout::FormatRange &o = oldRanges.at(i);
const QTextLayout::FormatRange &n = newRanges.at(i);
formatsChanged = (o.start != n.start || o.length != n.length || o.format != n.format);
}
if (formatsChanged) {
ranges.append(new_ranges);
ranges.append(newRanges);
layout->setFormats(ranges);
doc->markContentsDirty(currentBlock.position(), currentBlock.length());
}