mirror of
https://git.lyx.org/repos/lyx.git
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485 lines
11 KiB
C++
485 lines
11 KiB
C++
/**
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* \file InsetMathSideset.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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* \author Georg Baum
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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 "InsetMathSideset.h"
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#include "InsetMathSymbol.h"
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#include "MathData.h"
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#include "MathStream.h"
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#include "MathSupport.h"
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#include "BufferView.h"
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#include "Cursor.h"
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#include "DispatchResult.h"
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#include "FuncRequest.h"
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#include "FuncStatus.h"
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#include "LaTeXFeatures.h"
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#include "MetricsInfo.h"
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#include "support/debug.h"
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#include "support/lassert.h"
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using namespace std;
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namespace {
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/// x spacing between the nucleus and the scripts
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int const dx = 2;
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} // namespace
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namespace lyx {
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InsetMathSideset::InsetMathSideset(Buffer * buf, bool scriptl, bool scriptr)
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: InsetMathNest(buf, 3 + scriptl + scriptr), scriptl_(scriptl),
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scriptr_(scriptr)
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{}
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InsetMathSideset::InsetMathSideset(Buffer * buf, bool scriptl, bool scriptr,
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MathAtom const & at)
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: InsetMathNest(buf, 3 + scriptl + scriptr), scriptl_(scriptl),
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scriptr_(scriptr)
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{
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nuc().push_back(at);
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}
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Inset * InsetMathSideset::clone() const
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{
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return new InsetMathSideset(*this);
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}
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int InsetMathSideset::dybt(BufferView const & bv, int asc, int des, bool top) const
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{
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bool isCharBox = nuc().empty() ? false : isAlphaSymbol(nuc().back());
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int dasc = 0;
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if (scriptl_ && scriptr_)
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dasc = max(bl().dimension(bv).ascent(), br().dimension(bv).ascent());
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else if (scriptl_)
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dasc = bl().dimension(bv).ascent();
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else if (scriptr_)
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dasc = br().dimension(bv).ascent();
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int slevel = nuc().slevel();
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int ascdrop = dasc - slevel;
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int desdrop = isCharBox ? 0 : des + nuc().sshift();
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int mindes = nuc().mindes();
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des = max(desdrop, ascdrop);
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des = max(mindes, des);
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int minasc = nuc().minasc();
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ascdrop = 0;
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if (!isCharBox && (scriptl_ || scriptr_)) {
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if (scriptl_ && scriptr_)
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ascdrop = asc - min(tl().mindes(), tr().mindes());
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else if (scriptl_)
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ascdrop = asc - tl().mindes();
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else if (scriptr_)
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ascdrop = asc - tr().mindes();
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}
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int udes = 0;
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if (scriptl_)
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udes = bl().dimension(bv).descent();
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if (scriptr_)
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udes = max(udes, br().dimension(bv).descent());
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asc = udes + nuc().sshift();
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asc = max(ascdrop, asc);
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asc = max(minasc, asc);
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int del = asc - udes - dasc;
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if (del + des <= 2) {
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int newdes = 2 - del;
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del = slevel - asc + udes;
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if (del > 0) {
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asc += del;
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newdes -= del;
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}
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des = max(des, newdes);
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}
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return top ? asc : des;
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}
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int InsetMathSideset::dyb(BufferView const & bv) const
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{
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int nd = ndes(bv);
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int na = nasc(bv);
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int des = dybt(bv, na, nd, false);
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return des;
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}
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int InsetMathSideset::dyt(BufferView const & bv) const
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{
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int na = nasc(bv);
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int nd = ndes(bv);
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int asc = dybt(bv, na, nd, true);
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return asc;
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}
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int InsetMathSideset::dxr(BufferView const & bv) const
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{
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return dxn(bv) + nwid(bv) + dx;
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}
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int InsetMathSideset::dxn(BufferView const & bv) const
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{
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Dimension const dimb = bl().dimension(bv);
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Dimension const dimt = tl().dimension(bv);
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return max(dimb.width(), dimt.width()) + dx;
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}
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int InsetMathSideset::nwid(BufferView const & bv) const
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{
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return nuc().dimension(bv).width();
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}
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int InsetMathSideset::nasc(BufferView const & bv) const
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{
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return nuc().dimension(bv).ascent();
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}
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int InsetMathSideset::ndes(BufferView const & bv) const
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{
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return nuc().dimension(bv).descent();
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}
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int InsetMathSideset::nker(BufferView const * bv) const
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{
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int const kerning = nuc().kerning(bv);
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return max(kerning, 0);
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}
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void InsetMathSideset::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Changer dummy2 = mi.base.changeEnsureMath();
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Dimension dimn;
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Dimension dimbl;
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Dimension dimtl;
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Dimension dimbr;
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Dimension dimtr;
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nuc().metrics(mi, dimn);
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if (!scriptl_) {
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bl().metrics(mi, dimbl);
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dimtl = dimbl;
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}
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if (!scriptr_) {
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br().metrics(mi, dimbr);
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dimtr = dimbr;
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}
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Changer dummy = mi.base.changeScript();
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if (scriptl_) {
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bl().metrics(mi, dimbl);
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tl().metrics(mi, dimtl);
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}
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if (scriptr_) {
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br().metrics(mi, dimbr);
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tr().metrics(mi, dimtr);
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}
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BufferView const & bv = *mi.base.bv;
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// FIXME: data copying... not very efficient.
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dim.wid = nwid(bv) + nker(mi.base.bv) + 2 * dx;
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dim.wid += max(dimbl.width(), dimtl.width());
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dim.wid += max(dimbr.width(), dimtr.width());
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int na = nasc(bv);
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int asc = dyt(bv) + max(dimtl.ascent(), dimtr.ascent());
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dim.asc = max(na, asc);
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int nd = ndes(bv);
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int des = dyb(bv) + max(dimbl.descent(), dimbr.descent());
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dim.des = max(nd, des);
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}
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void InsetMathSideset::draw(PainterInfo & pi, int x, int y) const
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{
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Changer dummy2 = pi.base.changeEnsureMath();
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BufferView const & bv = *pi.base.bv;
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nuc().draw(pi, x + dxn(bv), y);
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if (!scriptl_)
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bl().draw(pi, x , y);
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if (!scriptr_)
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br().draw(pi, x + dxr(bv), y);
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Changer dummy = pi.base.changeScript();
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if (scriptl_) {
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bl().draw(pi, x , y + dyb(bv));
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tl().draw(pi, x , y - dyt(bv));
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}
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if (scriptr_) {
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br().draw(pi, x + dxr(bv), y + dyb(bv));
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tr().draw(pi, x + dxr(bv), y - dyt(bv));
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}
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}
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void InsetMathSideset::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
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{
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bl().metricsT(mi, dim);
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tl().metricsT(mi, dim);
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br().metricsT(mi, dim);
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tr().metricsT(mi, dim);
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nuc().metricsT(mi, dim);
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}
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void InsetMathSideset::drawT(TextPainter & pain, int x, int y) const
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{
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// FIXME: BROKEN
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nuc().drawT(pain, x + 1, y);
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bl().drawT(pain, x + 1, y + 1 /*dy0()*/);
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tl().drawT(pain, x + 1, y - 1 /*dy1()*/);
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br().drawT(pain, x + 1, y + 1 /*dy0()*/);
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tr().drawT(pain, x + 1, y - 1 /*dy1()*/);
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}
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bool InsetMathSideset::idxForward(Cursor & cur) const
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{
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if (!scriptl_ && cur.idx() == 1) {
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// left => nucleus
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cur.idx() = 0;
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return true;
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} else if (!scriptr_ && cur.idx() == 0) {
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// nucleus => right
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cur.idx() = 2 + scriptl_;
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return true;
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}
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return false;
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}
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bool InsetMathSideset::idxBackward(Cursor & cur) const
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{
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if (!scriptr_ && cur.idx() == (scriptl_ ? 3 : 2)) {
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// right => nucleus
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cur.idx() = 0;
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return true;
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} else if (!scriptl_ && cur.idx() == 0) {
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// nucleus => left
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cur.idx() = 1;
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return true;
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}
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return false;
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}
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bool InsetMathSideset::idxUpDown(Cursor & cur, bool up) const
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{
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// in nucleus?
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if (cur.idx() == 0) {
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// go up/down only if in the last position
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// or in the first position
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if ((scriptr_ && cur.pos() == cur.lastpos()) ||
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(scriptl_ && cur.pos() == 0)) {
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if (cur.pos() == 0)
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cur.idx() = up ? 2 : 1;
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else
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cur.idx() = (up ? 3 : 2) + scriptl_;
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cur.pos() = 0;
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return true;
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}
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return false;
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}
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// Are we 'up'?
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if ((scriptl_ && cur.idx() == 2) ||
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(scriptr_ && cur.idx() == (scriptl_ ? 4 : 3))) {
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// can't go further up
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if (up)
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return false;
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// otherwise go to first or last position in the nucleus
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cur.idx() = 0;
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if (cur.idx() == 2)
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cur.pos() = 0;
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else
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cur.pos() = cur.lastpos();
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return true;
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}
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// Are we 'down'?
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if ((scriptl_ && cur.idx() == 1) ||
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(scriptr_ && cur.idx() == (scriptl_ ? 3 : 2))) {
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// can't go further down
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if (!up)
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return false;
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// otherwise go to first or last position in the nucleus
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cur.idx() = 0;
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if (cur.idx() == 1)
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cur.pos() = 0;
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else
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cur.pos() = cur.lastpos();
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return true;
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}
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return false;
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}
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void InsetMathSideset::write(TeXMathStream & os) const
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{
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MathEnsurer ensurer(os);
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os << "\\sideset";
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os << '{';
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if (scriptl_) {
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if (!bl().empty())
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os << "_{" << bl() << '}';
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if (!tl().empty())
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os << "^{" << tl() << '}';
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} else
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os << bl();
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os << "}{";
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if (scriptr_) {
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if (!br().empty())
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os << "_{" << br() << '}';
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if (!tr().empty())
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os << "^{" << tr() << '}';
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} else
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os << br();
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os << '}';
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os << nuc();
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if (lock_ && !os.latex())
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os << "\\lyxlock ";
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}
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void InsetMathSideset::normalize(NormalStream & os) const
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{
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os << "[sideset ";
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if (!bl().empty())
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os << bl() << ' ';
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if (scriptl_ && !tl().empty())
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os << tl() << ' ';
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if (!nuc().empty())
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os << nuc() << ' ';
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else
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os << "[par]";
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if (!br().empty())
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os << br() << ' ';
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if (scriptr_ && !tr().empty())
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os << tr() << ' ';
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os << ']';
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}
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void InsetMathSideset::mathmlize(MathMLStream & ms) const
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{
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// FIXME This is only accurate if both scriptl_ and scriptr_ are true
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if (!scriptl_)
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ms << MTag("mrow") << bl() << ETag("mrow");
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if (scriptl_ || scriptr_) {
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ms << MTag("mmultiscripts");
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if (nuc().empty())
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ms << "<" << from_ascii(ms.namespacedTag("mrow")) << " />";
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else
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ms << MTag("mrow") << nuc() << ETag("mrow");
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if (br().empty() || !scriptr_)
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ms << "<" << from_ascii(ms.namespacedTag("none")) << " />";
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else
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ms << MTag("mrow") << br() << ETag("mrow");
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if (tr().empty() || !scriptr_)
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ms << "<" << from_ascii(ms.namespacedTag("none")) << " />";
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else
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ms << MTag("mrow") << tr() << ETag("mrow");
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if (bl().empty() || !scriptl_)
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ms << "<" << from_ascii(ms.namespacedTag("none")) << " />";
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else
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ms << MTag("mrow") << bl() << ETag("mrow");
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if (tl().empty() || !scriptl_)
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ms << "<" << from_ascii(ms.namespacedTag("none")) << " />";
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else
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ms << MTag("mrow") << tl() << ETag("mrow");
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ms << ETag("mmultiscripts");
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}
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if (!scriptr_)
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ms << MTag("mrow") << br() << ETag("mrow");
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}
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void InsetMathSideset::htmlize(HtmlStream & os) const
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{
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// FIXME This is only accurate if both scriptl_ and scriptr_ are true
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bool const havebl = scriptl_ && !bl().empty();
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bool const havetl = scriptl_ && !tl().empty();
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bool const havebr = scriptr_ && !br().empty();
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bool const havetr = scriptr_ && !tr().empty();
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if (!scriptl_ && !bl().empty())
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os << bl();
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if (havebl && havetl)
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os << MTag("span", "class='scripts'")
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<< MTag("span") << tl() << ETag("span")
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<< MTag("span") << bl() << ETag("span")
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<< ETag("span");
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else if (havebl)
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os << MTag("sub", "class='math'") << bl() << ETag("sub");
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else if (havetl)
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os << MTag("sup", "class='math'") << tl() << ETag("sup");
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if (!nuc().empty())
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os << nuc();
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if (havebr && havetr)
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os << MTag("span", "class='scripts'")
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<< MTag("span") << tr() << ETag("span")
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<< MTag("span") << br() << ETag("span")
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<< ETag("span");
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else if (havebr)
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os << MTag("sub", "class='math'") << br() << ETag("sub");
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else if (havetr)
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os << MTag("sup", "class='math'") << tr() << ETag("sup");
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if (!scriptr_ && !br().empty())
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os << br();
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}
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void InsetMathSideset::infoize(odocstream & os) const
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{
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os << "Sideset";
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}
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// the idea for dual scripts came from the eLyXer code
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void InsetMathSideset::validate(LaTeXFeatures & features) const
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{
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if (features.runparams().math_flavor == OutputParams::MathAsHTML)
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features.addCSSSnippet(
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"span.scripts{display: inline-block; vertical-align: middle; text-align:center; font-size: 75%;}\n"
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"span.scripts span {display: block;}\n"
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"sub.math{font-size: 75%;}\n"
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"sup.math{font-size: 75%;}");
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features.require("amsmath");
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InsetMathNest::validate(features);
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}
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} // namespace lyx
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