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Fix fonts used by sub/superscript in text

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Several changes are needed to get things right:
* nested supersripts only work with inheritFonts=true.

* to get caret position right, it is necessary to remember the outside
  font of the inset before computing metrics.

* to get the size right at insertion time, it is necessary to trigger
  a metrics computation just after inset insertion.
This commit is contained in:
Jean-Marc Lasgouttes 2019-03-22 16:13:30 +01:00
parent cfb8b214d1
commit d52e04a9b3
3 changed files with 16 additions and 3 deletions
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10
src/Text3.cpp
View File

@ -2030,6 +2030,16 @@ void Text::dispatch(Cursor & cur, FuncRequest & cmd)
// inside it.
doInsertInset(cur, this, cmd, true, true);
cur.posForward();
if (act == LFUN_SCRIPT_INSERT) {
/* Script insets change the font style in metrics(), and
* this is used to compute the height of the caret
* (because the font is stored in TextMetrics::font_).
* When we insert, we have to make sure that metrics are
* computed so that the caret height is wrong. Arguably,
* this is hackish.*/
bv->processUpdateFlags(Update::SinglePar);
}
cur.setCurrentFont();
// Some insets are numbered, others are shown in the outline pane so
// let's update the labels and the toc backend.
cur.forceBufferUpdate();

5
src/insets/InsetScript.cpp
View File

@ -160,6 +160,8 @@ Inset::DisplayType InsetScript::display() const
void InsetScript::metrics(MetricsInfo & mi, Dimension & dim) const
{
int const shift = params_.shift(mi.base.font);
// Remember the value of the outser font, so that it can be used in cursorPos.
outer_font_ = mi.base.font;
Changer dummy = mi.base.changeScript();
InsetText::metrics(mi, dim);
dim.asc -= shift;
@ -178,8 +180,7 @@ void InsetScript::draw(PainterInfo & pi, int x, int y) const
void InsetScript::cursorPos(BufferView const & bv,
CursorSlice const & sl, bool boundary, int & x, int & y) const
{
Font const font = bv.textMetrics(&text()).displayFont(sl.pit(), sl.pos());
int const shift = params_.shift(font.fontInfo());
int const shift = params_.shift(outer_font_);
InsetText::cursorPos(bv, sl, boundary, x, y);
y += shift;
}

4
src/insets/InsetScript.h
View File

@ -86,7 +86,7 @@ public:
///
bool neverIndent() const { return true; }
///
bool inheritFont() const { return false; }
bool inheritFont() const { return true; }
///
int plaintext(odocstringstream & ods, OutputParams const & op,
size_t max_length = INT_MAX) const;
@ -129,6 +129,8 @@ private:
friend class InsetScriptParams;
///
InsetScriptParams params_;
/// The font of containing inset; this is necessary to compute shift
mutable FontInfo outer_font_;
};