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e2bc7ffae3
RefChanger temporarily assigns a value to a non-const reference of any
kind. RefChanger provides a flexible and uniform generalisation of the various
scope guards previously derived from the old Changer class in MetricsInfo.h.
As before, a temporary assignment lasts as long as the Changer object lives. But
the new Changer is movable. In particular, contorsions are no longer needed to
change a private field. Special code can be moved into the appropriate classes,
and it is no longer necessary to create a new class for each specific use.
Syntax change:
FontSetChanger dummy(mi.base, value);
-> Changer dummy = mi.base.changeFontSet(value);
New function for generating arbitrary Changers:
Changer dummy = make_change(ref, val, condition);
Bugfix:
* Fix the display of \displaystyle{\substack{\frac{xyz}{}}} (missing style
change).
173 lines
3.3 KiB
C++
173 lines
3.3 KiB
C++
/**
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* \file InsetMathXYArrow.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author André Pönitz
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "InsetMathXYArrow.h"
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#include "MathStream.h"
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#include "MathSupport.h"
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#include "frontends/Painter.h"
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#include "support/debug.h"
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using namespace std;
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namespace lyx {
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InsetMathXYArrow::InsetMathXYArrow()
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: InsetMathNest(2), up_(false), target_(0)
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{}
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Inset * InsetMathXYArrow::clone() const
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{
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return new InsetMathXYArrow(*this);
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}
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InsetMathXYMatrix const * InsetMathXYArrow::targetMatrix() const
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{
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return target_;
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}
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MathData const & InsetMathXYArrow::targetCell() const
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{
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#if 0
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InsetMathXYMatrix const * p = targetMatrix();
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int x = 0;
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int y = 0;
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MathData const & t = cell(0);
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for (MathData::const_iterator it = t.begin(); it != t.end(); ++it) {
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switch ((*it)->getChar()) {
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case 'l': --x; break;
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case 'r': ++x; break;
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case 'u': --y; break;
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case 'd': ++y; break;
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}
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}
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//lyxerr << "target: x: " << x << " y: " << y << endl;
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InsetMath::idx_type n = mi_.idx + p->ncols() * y + x;
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if (n >= p->nargs()) {
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lyxerr << "source: n: " << mi_.idx << "\n"
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<< "target: n: " << n << " out of range" << endl;
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n = 0;
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}
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return p->cell(n);
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#else
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static MathData dummy;
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return dummy;
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#endif
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}
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MathData const & InsetMathXYArrow::sourceCell() const
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{
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#if 0
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return targetMatrix()->cell(mi_.idx);
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#else
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static MathData dummy;
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return dummy;
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#endif
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}
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bool InsetMathXYArrow::metrics(MetricsInfo & mi) const
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{
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InsetMathNest::metrics(mi);
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mi_ = mi;
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Changer dummy = mi.base.changeFontSet(mi.base, "textrm");
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#if 0
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target_ = mi.inset ? mi.inset->asXYMatrixInset() : 0;
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if (editing()) {
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int w = mathed_string_width(mi.base.font, from_ascii("target: "));
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width_ = w + max(dim0.width(), dim1.wid);
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ascent_ = dim0.asc;
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descent_ = dim0.des + dim1.height() + 10;
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} else {
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width_ = 0;
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ascent_ = 0;
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descent_ = 0;
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//mathed_string_dim(font_, "X", ascent_, descent_, width_);
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}
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#endif
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}
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void InsetMathXYArrow::draw(PainterInfo & pi, int x, int y) const
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{
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metrics(mi_);
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Changer dummy = pi.base.changeFontSet(pi.base, "textrm");
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if (editing()) {
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#if 0
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int lasc;
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int ldes;
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int lwid;
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mathed_string_dim(pi.base.font, "target: ", lasc, ldes, lwid);
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cell(0).draw(pi, x + lwid, y);
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pi.base.text(x + 3, y, "target");
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y += max(dim0.des, ldes) + 5;
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y += max(dim1.asc, lasc) + 5;
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cell(1).draw(pi, x + lwid, y);
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pi.base.text(x + 3, y, "label");
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#endif
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} else {
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pi.pain.text(x, y, "X");
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MathData const & s = sourceCell();
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MathData const & t = targetCell();
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pi.pain.line(s.xm(), s.ym(), t.xm(), t.ym(), Color_math);
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cell(1).draw(pi, (s.xm() + t.xm())/2, (s.ym() + t.ym())/2);
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}
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}
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void InsetMathXYArrow::write(WriteStream & os) const
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{
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MathEnsurer ensurer(os);
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os << "\\ar";
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if (!cell(0).empty())
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os << '[' << cell(0) << ']';
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if (!cell(1).empty())
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os << (up_ ? '^' : '_') << '{' << cell(1) << '}';
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os << " ";
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}
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void InsetMathXYArrow::normalize(NormalStream & os) const
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{
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os << "[xyarrow ";
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InsetMathNest::normalize(os);
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os << ']';
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}
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void InsetMathXYArrow::mathmlize(MathStream &) const
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{
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throw MathExportException();
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}
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void InsetMathXYArrow::htmlize(HtmlStream &) const
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{
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throw MathExportException();
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}
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} // namespace lyx
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