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More consistent line spacing/leading

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Uses maxHeight (= maxAscent + maxDescent) as leading.

Fix for bug #11818.
This commit is contained in:
Daniel Ramoeller 2020-09-22 06:28:06 +02:00 committed by Pavel Sanda
parent 9a163399fb
commit 9361bf56a3
1 changed files with 28 additions and 7 deletions
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35
src/TextMetrics.cpp
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@ -1286,20 +1286,39 @@ void TextMetrics::setRowHeight(Row & row) const
{
Paragraph const & par = text_->getPar(row.pit());
Layout const & layout = par.layout();
double const spacing_val = layout.spacing.getValue() * text_->spacing(par);
// leading space (line spacing) factor based on current paragraph
double spacing_val = layout.spacing.getValue() * text_->spacing(par);
// if this is the first row but not the first paragraph, take into
// account the spacing of the previous paragraph.
if (row.pos() == 0 && row.pit() > 0) {
// for the first row in the paragraph,
// use previous paragraphs line spacing if it is larger
Paragraph const & previousPar = text_->getPar(row.pit() - 1);
Layout const & previousLayout = previousPar.layout();
// leading space factor based on previous paragraph
double const previous_spacing_val
= previousLayout.spacing.getValue() * text_->spacing(previousPar);
if (previous_spacing_val > spacing_val)
spacing_val = previous_spacing_val;
}
// Initial value for ascent (useful if row is empty).
Font const font = displayFont(row.pit(), row.pos());
FontMetrics const & fm = theFontMetrics(font);
int maxasc = int(fm.maxAscent() * spacing_val);
int maxdes = int(fm.maxDescent() * spacing_val);
int maxasc = int(fm.maxAscent()
// add leading space
+ fm.maxHeight() * (spacing_val - 1));
int maxdes = int(fm.maxDescent());
// Take label string into account (useful if labelfont is large)
if (row.pos() == 0 && layout.labelIsInline()) {
FontInfo const labelfont = text_->labelFont(par);
FontMetrics const & lfm = theFontMetrics(labelfont);
maxasc = max(maxasc, int(lfm.maxAscent() * spacing_val));
maxdes = max(maxdes, int(lfm.maxDescent() * spacing_val));
maxasc = max(maxasc, int(lfm.maxAscent()
// add leading space
+ lfm.maxHeight() * (spacing_val - 1)));
maxdes = max(maxdes, int(lfm.maxDescent()));
}
// Find the ascent/descent of the row contents
@ -1309,8 +1328,10 @@ void TextMetrics::setRowHeight(Row & row) const
maxdes = max(maxdes, e.dim.descent());
} else {
FontMetrics const & fm2 = theFontMetrics(e.font);
maxasc = max(maxasc, int(fm2.maxAscent() * spacing_val));
maxdes = max(maxdes, int(fm2.maxDescent() * spacing_val));
maxasc = max(maxasc, int(fm2.maxAscent()
// add leading space
+ fm2.maxHeight() * (spacing_val - 1)));
maxdes = max(maxdes, int(fm2.maxDescent()));
}
}