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TextEditor: Avoid divide by zero error

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And adding a few asserts in places that could cause this to happen.

Fixes: QTCREATORBUG-31623
Change-Id: I8de5db14313791b1d6614dc0e29d0d3dd65e8542
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
This commit is contained in:
David Schulz
2024-09-23 11:33:08 +02:00
parent 852470cfbb
commit 88edec1bf4
2 changed files with 3 additions and 1 deletions
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3
src/plugins/texteditor/fontsettings.cpp
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@@ -103,6 +103,7 @@ bool FontSettings::fromSettings(const FormatDescriptions &descriptions, const Qt
m_fontSize = s->value(group + fontSizeKey, m_fontSize).toInt();
m_fontZoom= s->value(group + fontZoomKey, m_fontZoom).toInt();
m_lineSpacing = s->value(group + lineSpacingKey, m_lineSpacing).toInt();
QTC_ASSERT(m_lineSpacing >= 0, m_lineSpacing = 100);
m_antialias = s->value(group + antialiasKey, DEFAULT_ANTIALIAS).toBool();
if (s->contains(group + schemeFileNamesKey)) {
@@ -337,7 +338,7 @@ qreal FontSettings::lineSpacing() const
QFont currentFont = font();
currentFont.setPointSize(std::max(m_fontSize * m_fontZoom / 100, 1));
qreal spacing = QFontMetricsF(currentFont).lineSpacing();
if (m_lineSpacing != 100)
if (QTC_GUARD(m_lineSpacing > 0) && m_lineSpacing != 100)
spacing *= qreal(m_lineSpacing) / 100;
return spacing;
}

1
src/plugins/texteditor/texteditor.cpp
View File

@@ -5160,6 +5160,7 @@ void TextEditorWidgetPrivate::updateLineAnnotation(const PaintEventData &data,
q->viewport()->update(annotationRect.rect.toAlignedRect());
}
m_annotationRects[data.block.blockNumber()] = newRects;
QTC_ASSERT(data.lineSpacing != 0, return);
const int maxVisibleLines = data.viewportRect.height() / data.lineSpacing;
if (m_annotationRects.size() >= maxVisibleLines * 2)
scheduleCleanupAnnotationCache();