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Do not modify the changed() status of rows when no drawing has taken place
There are several places in the code where a row is painted with drawing disabled in the painter. The goal is only to recompute inset positions. Such a case happens in BufferView::checkCursorScrollOffset, as part of the horizontal scrolling patch. It makes sens to consider that only a real painting of a row should change its status. However, I would not be surprised if this change would break other things. Fixes: #9388
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@ -1878,7 +1878,8 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type const pit, int const
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}
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// Row signature; has row changed since last paint?
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row.setCrc(pm.computeRowSignature(row, bparams));
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if (pi.pain.isDrawingEnabled())
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row.setCrc(pm.computeRowSignature(row, bparams));
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bool row_has_changed = row.changed()
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|| rowSlice == bv_->lastRowSlice();
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@ -1916,7 +1917,8 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type const pit, int const
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LYXERR(Debug::PAINTING, foreword << "pit=" << pit << " row=" << i
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<< " row_selection=" << row.selection()
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<< " full_repaint=" << pi.full_repaint
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<< " row_has_changed=" << row_has_changed);
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<< " row_has_changed=" << row_has_changed
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<< " drawingEnabled=" << pi.pain.isDrawingEnabled());
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}
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// Backup full_repaint status and force full repaint
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