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Define mathClass of MathMacro

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Enables intelligent splitting for math macros.

Crucially improves the detection of math words for the new Ctrl-Arrow movement.
This commit is contained in:
Guillaume Munch 2017-01-03 20:17:20 +01:00
parent eb2d373e4b
commit a467671283
3 changed files with 33 additions and 3 deletions
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14
src/mathed/MathData.cpp
View File

@ -889,6 +889,20 @@ int MathData::yo(BufferView const & bv) const
}
MathClass MathData::mathClass() const
{
MathClass res = MC_UNKNOWN;
for (MathAtom const & at : *this) {
MathClass mc = at->mathClass();
if (res == MC_UNKNOWN)
res = mc;
else if (mc != MC_UNKNOWN && res != mc)
return MC_ORD;
}
return res == MC_UNKNOWN ? MC_ORD : res;
}
ostream & operator<<(ostream & os, MathData const & ar)
{
odocstringstream oss;

2
src/mathed/MathData.h
View File

@ -137,6 +137,8 @@ public:
void drawT(TextPainter & pi, int x, int y) const;
/// mark cell for re-drawing
void touch() const;
/// approximate the math class of the data
MathClass mathClass() const;
/// access to cached x coordinate of last drawing
int xo(BufferView const & bv) const;

20
src/mathed/MathMacro.cpp
View File

@ -140,6 +140,15 @@ public:
void htmlize(HtmlStream & ms) const { ms << mathMacro_->cell(idx_); }
///
void octave(OctaveStream & os) const { os << mathMacro_->cell(idx_); }
///
MathClass mathClass() const
{
return MC_UNKNOWN;
// This can be refined once the pointer issues are fixed. I did not
// notice any immediate crash with the following code, but it is risky
// nevertheless:
//return mathMacro_->cell(idx_).mathClass();
}
private:
///
@ -823,16 +832,21 @@ size_t MathMacro::appetite() const
MathClass MathMacro::mathClass() const
{
// this only affects intelligent splitting since global macros are always
// linearised.
// This can be just a heuristic, since it is only considered for display
// when the macro is not linearised. Therefore it affects:
// * The spacing of the inset while being edited,
// * Intelligent splitting
// * Cursor word movement (Ctrl-Arrow).
if (MacroData const * m = macroBackup()) {
// If it is a global macro and is defined explicitly
if (m->symbol()) {
MathClass mc = string_to_class(d->macroBackup_.symbol()->extra);
if (mc != MC_UNKNOWN)
return mc;
}
}
return MC_ORD;
// Otherwise guess from the expanded macro
return d->expanded_.mathClass();
}