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Fix display of a math hull inset in a tight inset

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This is a kind of hack. This allows InsetMathHull to state that it
needs some elbow room beyond its width, in order to fit the numbering
and/or the left margin (with left alignment), which are outside of the
inset itself.

To this end, InsetMathHull::metrics() sets a value in
MetricsInfo::extrawidth and this value is recorded later in the
corresponding row element's `extra' field.

The code could be reorganized to be simpler, in particular by
computing metrics in tokenizeRow, or after tokenizeRow. However the
choice here is to produce a simple patch, fit for 2.4.0.

Fixes bug #12320.
This commit is contained in:
Jean-Marc Lasgouttes 2023-07-14 02:13:18 +02:00
parent bf69b7b3a7
commit 4bbd4a45e7
6 changed files with 38 additions and 8 deletions
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3
src/MetricsInfo.cpp
View File

@ -123,7 +123,8 @@ int MetricsBase::inPixels(Length const & len) const
MetricsInfo::MetricsInfo(BufferView * bv, FontInfo font, int textwidth,
MacroContext const & mc, bool vm, bool tight)
: base(bv, font, textwidth), macrocontext(mc), vmode(vm), tight_insets(tight)
: base(bv, font, textwidth), macrocontext(mc), vmode(vm), tight_insets(tight),
extrawidth(0)
{}

2
src/MetricsInfo.h
View File

@ -105,6 +105,8 @@ public:
bool vmode;
/// if true, do not expand insets to max width artificially
bool tight_insets;
/// Extra width required by an inset, in addition to its dimension
int extrawidth;
};

5
src/Row.cpp
View File

@ -509,14 +509,15 @@ void Row::addMarginSpace(pos_type const pos, int const width,
void Row::push_back(Row::Element const & e)
{
dim_.wid += e.dim.wid;
dim_.wid += e.dim.wid + ((e.type == INSET) ? e.extra : 0);
elements_.push_back(e);
}
void Row::pop_back()
{
dim_.wid -= elements_.back().dim.wid;
Element const & e = elements_.back();
dim_.wid -= e.dim.wid + ((e.type == INSET) ? e.extra : 0);
elements_.pop_back();
}

9
src/RowPainter.cpp
View File

@ -100,12 +100,14 @@ void RowPainter::paintInset(Row::Element const & e) const
bool const pi_full_repaint = pi_.full_repaint;
bool const pi_do_spellcheck = pi_.do_spellcheck;
Change const pi_change = pi_.change;
int const pi_textwidth = pi_.base.textwidth;
pi_.base.font = e.inset->inheritFont() ? e.font.fontInfo() :
pi_.base.bv->buffer().params().getFont().fontInfo();
pi_.ltr_pos = !e.font.isVisibleRightToLeft();
pi_.change = pi_.change.changed() ? pi_.change : e.change;
pi_.do_spellcheck &= e.inset->allowSpellCheck();
pi_.base.textwidth += e.extra;
int const x1 = int(x_);
pi_.base.bv->coordCache().insets().add(e.inset, x1, yo_);
@ -122,6 +124,7 @@ void RowPainter::paintInset(Row::Element const & e) const
pi_.change = pi_change;
pi_.do_spellcheck = pi_do_spellcheck;
pi_.selected = pi_selected;
pi_.base.textwidth = pi_textwidth;
#ifdef DEBUG_METRICS
Dimension const & dim = pi_.base.bv->coordCache().insets().dim(e.inset);
@ -555,7 +558,8 @@ void RowPainter::paintOnlyInsets()
paintChange(e);
}
x_ += e.full_width();
// extra is the extrawidth band-aid described in redoParagraphs
x_ += e.full_width() + ((e.type == Row::INSET) ? e.extra : 0);
}
}
@ -590,7 +594,8 @@ void RowPainter::paintText()
if (e.type != Row::INSET || ! e.inset->canPaintChange(*pi_.base.bv))
paintChange(e);
x_ += e.full_width();
// extra is the extrawidth band-aid described in redoParagraphs
x_ += e.full_width() + ((e.type == Row::INSET) ? e.extra : 0);
}
}

18
src/TextMetrics.cpp
View File

@ -485,6 +485,7 @@ bool TextMetrics::redoParagraph(pit_type const pit, bool const align_rows)
par.setBeginOfBody();
Font const bufferfont = buffer.params().getFont();
CoordCache::Insets & insetCache = bv_->coordCache().insets();
map <Inset const *, int> extrawidths;
for (auto const & e : par.insetList()) {
// FIXME Doesn't this HAVE to be non-empty?
// position already initialized?
@ -520,6 +521,17 @@ bool TextMetrics::redoParagraph(pit_type const pit, bool const align_rows)
MacroContext mc(&buffer, parPos);
MetricsInfo mi(bv_, font.fontInfo(), w, mc, e.pos == 0, tight_);
e.inset->metrics(mi, dim);
/* FIXME: This is a kind of hack. This allows InsetMathHull to
* state that it needs some elbow room beyond its width, in
* order to fit the numbering and/or the left margin (with
* left alignment), which are outside of the inset itself.
*
* To this end, InsetMathHull::metrics() sets a value in
* MetricsInfo::extrawidth and this value is recorded later in
* the corresponding row element's `extra' field. See ticket
* #12320 for details.
*/
extrawidths[e.inset] = mi.extrawidth;
if (!insetCache.has(e.inset) || insetCache.dim(e.inset) != dim) {
insetCache.add(e.inset, dim);
changed = true;
@ -527,7 +539,11 @@ bool TextMetrics::redoParagraph(pit_type const pit, bool const align_rows)
}
// Transform the paragraph into a single row containing all the elements.
Row const bigrow = tokenizeParagraph(pit);
Row bigrow = tokenizeParagraph(pit);
// Add the needed extra width to the row elements of the insets
for (auto & e : bigrow)
if (e.type == Row::INSET)
e.extra = extrawidths[e.inset];
// Split the row in several rows fitting in available width
pm.rows() = breakParagraph(bigrow);

9
src/mathed/InsetMathHull.cpp
View File

@ -476,6 +476,9 @@ void InsetMathHull::metrics(MetricsInfo & mi, Dimension & dim) const
if (mi.vmode)
top_display_margin += theFontMetrics(mi.base.font).maxHeight() + 2;
int const ind = indent(*mi.base.bv);
mi.extrawidth = ind;
if (previewState(mi.base.bv)) {
preview_->metrics(mi, dim);
if (previewTooSmall(dim)) {
@ -507,6 +510,7 @@ void InsetMathHull::metrics(MetricsInfo & mi, Dimension & dim) const
if (numberedType()) {
BufferParams::MathNumber const math_number = buffer().params().getMathNumber();
int extra_offset = 0;
int max_nlwid = 0;
for (row_type row = 0; row < nrows(); ++row) {
rowinfo(row).offset[mi.base.bv] += extra_offset;
docstring const nl = nicelabel(row);
@ -514,7 +518,6 @@ void InsetMathHull::metrics(MetricsInfo & mi, Dimension & dim) const
continue;
Dimension dimnl;
mathed_string_dim(mi.base.font, nl, dimnl);
int const ind = indent(*mi.base.bv);
int const x = ind ? ind : (mi.base.textwidth - dim.wid) / 2;
// for some reason metrics does not trigger at the
// same point as draw, and therefore we use >= instead of >
@ -522,8 +525,10 @@ void InsetMathHull::metrics(MetricsInfo & mi, Dimension & dim) const
|| (math_number == BufferParams::RIGHT
&& dimnl.wid >= mi.base.textwidth - x - dim.wid)) {
extra_offset += dimnl.height();
}
} else if (dimnl.wid > max_nlwid)
max_nlwid = dimnl.wid;
}
mi.extrawidth += max_nlwid;
dim.des += extra_offset;
}