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Help/litehtml: Implement text search

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Build an index between (visible) text and litehtml elements, so we can
use the regular text search functionality of Qt.

Change-Id: I2bf29628482f81c67b20b9a02d7808a330a073eb
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: hjk <hjk@qt.io>
This commit is contained in:
Eike Ziller
2019-09-16 14:24:03 +02:00
parent 3f2c0f0a5a
commit dff7e1515a
5 changed files with 213 additions and 6 deletions
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28
src/plugins/help/qlitehtml/qlitehtmlwidget.cpp
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@@ -434,6 +434,34 @@ QString QLiteHtmlWidget::title() const
return d->documentContainer.caption();
}
bool QLiteHtmlWidget::findText(const QString &text,
QTextDocument::FindFlags flags,
bool incremental,
bool *wrapped)
{
bool success = false;
QVector<QRect> oldSelection;
QVector<QRect> newSelection;
d->documentContainer
.findText(text, flags, incremental, wrapped, &success, &oldSelection, &newSelection);
// scroll to search result position and/or redraw as necessary
QRect newSelectionCombined;
for (const QRect &r : newSelection)
newSelectionCombined = newSelectionCombined.united(r);
if (success && verticalScrollBar()->value() > newSelectionCombined.top()) {
verticalScrollBar()->setValue(newSelectionCombined.top());
} else if (success
&& verticalScrollBar()->value() + viewport()->height()
< newSelectionCombined.bottom()) {
verticalScrollBar()->setValue(newSelectionCombined.bottom() - viewport()->height());
} else {
viewport()->update(newSelectionCombined.translated(-scrollPosition()));
for (const QRect &r : oldSelection)
viewport()->update(r.translated(-scrollPosition()));
}
return success;
}
void QLiteHtmlWidget::setDefaultFont(const QFont &font)
{
d->documentContainer.setDefaultFont(font);