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Reduces editor updates in certain cases

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Done-with: Roberto Raggi
This commit is contained in:
mae
2010-08-06 21:55:48 +02:00
parent a24ac12af7
commit ec1d555a3b
2 changed files with 17 additions and 38 deletions
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52
src/plugins/texteditor/syntaxhighlighter.cpp
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@@ -111,27 +111,11 @@ void SyntaxHighlighterPrivate::applyFormatChanges(int from, int charsRemoved, in
QList<QTextLayout::FormatRange> ranges = layout->additionalFormats();
const int preeditAreaStart = layout->preeditAreaPosition();
const int preeditAreaLength = layout->preeditAreaText().length();
bool doAdjustRange = currentBlock.contains(from);
if (preeditAreaLength != 0) {
QList<QTextLayout::FormatRange>::Iterator 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 if (it->start >= preeditAreaStart
&& it->start + it->length <= preeditAreaStart + preeditAreaLength) {
++it;
} else {
it = ranges.erase(it);
formatsChanged = true;
}
}
} else if (!ranges.isEmpty()) {
QList<QTextLayout::FormatRange> old_ranges;
if (!ranges.isEmpty()) {
QList<QTextLayout::FormatRange>::Iterator it = ranges.begin();
while (it != ranges.end()) {
if (it->format.property(QTextFormat::UserProperty).toBool()) {
@@ -140,8 +124,8 @@ void SyntaxHighlighterPrivate::applyFormatChanges(int from, int charsRemoved, in
|| formatsChanged;
++it;
} else {
old_ranges.append(*it);
it = ranges.erase(it);
formatsChanged = true;
}
}
}
@@ -151,6 +135,7 @@ void SyntaxHighlighterPrivate::applyFormatChanges(int from, int charsRemoved, in
QTextLayout::FormatRange r;
r.start = -1;
QList<QTextLayout::FormatRange> new_ranges;
int i = 0;
while (i < formatChanges.count()) {
@@ -171,33 +156,26 @@ void SyntaxHighlighterPrivate::applyFormatChanges(int from, int charsRemoved, in
r.length = i - r.start;
if (preeditAreaLength != 0) {
if (r.start >= preeditAreaStart)
r.start += preeditAreaLength;
else if (r.start + r.length >= preeditAreaStart)
r.length += preeditAreaLength;
}
ranges << r;
formatsChanged = true;
new_ranges << r;
r.start = -1;
}
if (r.start != -1) {
r.length = formatChanges.count() - r.start;
if (preeditAreaLength != 0) {
if (r.start >= preeditAreaStart)
r.start += preeditAreaLength;
else if (r.start + r.length >= preeditAreaStart)
r.length += preeditAreaLength;
}
new_ranges << r;
}
ranges << r;
formatsChanged = true;
formatsChanged = formatsChanged || (new_ranges.size() != old_ranges.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);
formatsChanged = (o.start != n.start || o.length != n.length || o.format != n.format);
}
if (formatsChanged) {
ranges.append(new_ranges);
layout->setAdditionalFormats(ranges);
doc->markContentsDirty(currentBlock.position(), currentBlock.length());
}