mirror of
https://git.lyx.org/repos/lyx.git
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03a4b8c932
* Convert the kerning into a proper right margin for mathnormal, mathscr and mathcal (fonts with \fontdimen2 == 0 as per rule 17 from TeXBook). * Simulate the fact that characters in mathnormal fonts have a 0-width left bearing. * Implement subscript positioning in the case of rule 17 using negative italic correction (kerning_).
806 lines
17 KiB
C++
806 lines
17 KiB
C++
/**
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* \file InsetMathScript.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 "InsetMathScript.h"
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#include "InsetMathBrace.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/gettext.h"
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#include "support/lassert.h"
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using namespace std;
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namespace lyx {
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InsetMathScript::InsetMathScript(Buffer * buf)
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: InsetMathNest(buf, 1), cell_1_is_up_(false), limits_(0)
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{}
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InsetMathScript::InsetMathScript(Buffer * buf, bool up)
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: InsetMathNest(buf, 2), cell_1_is_up_(up), limits_(0)
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{}
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InsetMathScript::InsetMathScript(Buffer * buf, MathAtom const & at, bool up)
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: InsetMathNest(buf, 2), cell_1_is_up_(up), limits_(0)
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{
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LATTEST(nargs() >= 1);
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cell(0).push_back(at);
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}
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Inset * InsetMathScript::clone() const
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{
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return new InsetMathScript(*this);
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}
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InsetMathScript const * InsetMathScript::asScriptInset() const
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{
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return this;
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}
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InsetMathScript * InsetMathScript::asScriptInset()
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{
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return this;
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}
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bool InsetMathScript::idxFirst(Cursor & cur) const
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{
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cur.idx() = 0;
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cur.pos() = 0;
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return true;
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}
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bool InsetMathScript::idxLast(Cursor & cur) const
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{
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cur.idx() = 0;
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cur.pos() = nuc().size();
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return true;
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}
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MathData const & InsetMathScript::down() const
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{
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if (nargs() == 3)
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return cell(2);
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LBUFERR(nargs() > 1);
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return cell(1);
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}
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MathData & InsetMathScript::down()
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{
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if (nargs() == 3)
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return cell(2);
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LBUFERR(nargs() > 1);
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return cell(1);
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}
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MathData const & InsetMathScript::up() const
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{
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LBUFERR(nargs() > 1);
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return cell(1);
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}
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MathData & InsetMathScript::up()
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{
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LBUFERR(nargs() > 1);
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return cell(1);
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}
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void InsetMathScript::ensure(bool up)
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{
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if (nargs() == 1) {
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// just nucleus so far
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cells_.push_back(MathData());
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cell_1_is_up_ = up;
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} else if (nargs() == 2 && !has(up)) {
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if (up) {
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cells_.push_back(cell(1));
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cell(1).clear();
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} else {
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cells_.push_back(MathData());
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}
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}
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}
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MathData const & InsetMathScript::nuc() const
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{
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return cell(0);
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}
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MathData & InsetMathScript::nuc()
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{
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return cell(0);
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}
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int InsetMathScript::dy01(BufferView const & bv, int asc, int des, int what) const
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{
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int dasc = 0;
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int slevel = 0;
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bool isCharBox = !nuc().empty() ? isAlphaSymbol(nuc().back()) : false;
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if (hasDown()) {
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Dimension const & dimdown = down().dimension(bv);
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dasc = dimdown.ascent();
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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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}
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if (hasUp()) {
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Dimension const & dimup = up().dimension(bv);
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int minasc = nuc().minasc();
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int ascdrop = isCharBox ? 0 : asc - up().mindes();
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int udes = dimup.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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if (hasDown()) {
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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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}
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}
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return what ? asc : des;
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}
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int InsetMathScript::dy0(BufferView const & bv) const
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{
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int nd = ndes(bv);
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if (!hasDown())
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return nd;
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int des = down().dimension(bv).ascent();
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if (hasLimits())
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des += nd + 2;
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else {
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int na = nasc(bv);
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des = dy01(bv, na, nd, 0);
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}
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return des;
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}
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int InsetMathScript::dy1(BufferView const & bv) const
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{
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int na = nasc(bv);
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if (!hasUp())
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return na;
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int asc = up().dimension(bv).descent();
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if (hasLimits())
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asc += na + 2;
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else {
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int nd = ndes(bv);
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asc = dy01(bv, na, nd, 1);
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}
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asc = max(asc, 5);
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return asc;
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}
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int InsetMathScript::dx0(BufferView const & bv) const
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{
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LASSERT(hasDown(), return 0);
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Dimension const dim = dimension(bv);
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return hasLimits() ? (dim.wid - down().dimension(bv).width()) / 2
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: nwid(bv) + min(nker(&bv), 0);
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}
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int InsetMathScript::dx1(BufferView const & bv) const
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{
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LASSERT(hasUp(), return 0);
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Dimension const dim = dimension(bv);
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return hasLimits() ? (dim.wid - up().dimension(bv).width()) / 2
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: nwid(bv) + max(nker(&bv), 0);
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}
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int InsetMathScript::dxx(BufferView const & bv) const
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{
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Dimension const dim = dimension(bv);
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return hasLimits() ? (dim.wid - nwid(bv)) / 2 : 0;
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}
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int InsetMathScript::nwid(BufferView const & bv) const
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{
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return !nuc().empty() ? nuc().dimension(bv).width() : 2;
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}
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int InsetMathScript::nasc(BufferView const & bv) const
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{
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return !nuc().empty() ? nuc().dimension(bv).ascent() : 5;
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}
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int InsetMathScript::ndes(BufferView const & bv) const
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{
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return !nuc().empty() ? nuc().dimension(bv).descent() : 0;
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}
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int InsetMathScript::nker(BufferView const * bv) const
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{
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if (!nuc().empty())
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return nuc().kerning(bv);
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return 0;
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}
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MathClass InsetMathScript::mathClass() const
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{
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// FIXME: this is a hack, since the class will not be correct if
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// the nucleus has several elements or if the last element is a math macro
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// or a macro argument proxy.
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// The correct implementation would require to linearize the nucleus.
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if (nuc().empty())
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return MC_ORD;
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else {
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// return the class of last element since this is the one that counts.
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MathClass mc = nuc().back()->mathClass();
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return (mc == MC_UNKNOWN) ? MC_ORD : mc;
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}
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}
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void InsetMathScript::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Changer dummy2 = mi.base.changeEnsureMath();
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Dimension dim0;
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Dimension dim1;
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Dimension dim2;
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cell(0).metrics(mi, dim0);
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Changer dummy = mi.base.changeScript();
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if (nargs() > 1)
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cell(1).metrics(mi, dim1);
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if (nargs() > 2)
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cell(2).metrics(mi, dim2);
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dim.wid = 0;
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BufferView & bv = *mi.base.bv;
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// FIXME: data copying... not very efficient.
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Dimension dimup;
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Dimension dimdown;
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if (hasUp())
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dimup = up().dimension(bv);
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if (hasDown())
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dimdown = down().dimension(bv);
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if (hasLimits()) {
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dim.wid = nwid(bv);
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if (hasUp())
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dim.wid = max(dim.wid, dimup.width());
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if (hasDown())
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dim.wid = max(dim.wid, dimdown.width());
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} else {
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if (hasUp())
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dim.wid = max(dim.wid, max(nker(mi.base.bv), 0) + dimup.width());
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if (hasDown())
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dim.wid = max(dim.wid, min(nker(mi.base.bv), 0) + dimdown.width());
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dim.wid += nwid(bv);
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}
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int na = nasc(bv);
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if (hasUp()) {
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int asc = dy1(bv) + dimup.ascent();
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dim.asc = max(na, asc);
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} else
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dim.asc = na;
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int nd = ndes(bv);
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if (hasDown()) {
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int des = dy0(bv) + dimdown.descent();
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dim.des = max(nd, des);
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} else
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dim.des = nd;
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}
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void InsetMathScript::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 & bv = *pi.base.bv;
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if (!nuc().empty())
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nuc().draw(pi, x + dxx(bv), y);
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else {
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nuc().setXY(bv, x + dxx(bv), y);
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if (editing(&bv))
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pi.draw(x + dxx(bv), y, char_type('.'));
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}
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Changer dummy = pi.base.changeScript();
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if (hasUp())
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up().draw(pi, x + dx1(bv), y - dy1(bv));
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if (hasDown())
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down().draw(pi, x + dx0(bv), y + dy0(bv));
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}
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void InsetMathScript::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
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{
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if (hasUp())
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up().metricsT(mi, dim);
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if (hasDown())
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down().metricsT(mi, dim);
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nuc().metricsT(mi, dim);
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}
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void InsetMathScript::drawT(TextPainter & pain, int x, int y) const
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{
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// FIXME: BROKEN
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if (!nuc().empty())
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nuc().drawT(pain, x + 1, y);
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if (hasUp())
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up().drawT(pain, x + 1, y - 1 /*dy1()*/);
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if (hasDown())
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down().drawT(pain, x + 1, y + 1 /*dy0()*/);
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}
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bool InsetMathScript::hasLimits() const
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{
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// obvious cases
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if (limits_ == 1)
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return true;
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if (limits_ == -1)
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return false;
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// we can only display limits if the nucleus wants some
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if (nuc().empty())
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return false;
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if (!nuc().back()->isScriptable())
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return false;
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if (nuc().back()->asSymbolInset()) {
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// \intop is an alias for \int\limits, \ointop == \oint\limits
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if (nuc().back()->asSymbolInset()->name().find(from_ascii("intop")) != string::npos)
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return true;
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// per default \int has limits beside the \int even in displayed formulas
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if (nuc().back()->asSymbolInset()->name().find(from_ascii("int")) != string::npos)
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return false;
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}
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// assume "real" limits for everything else
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return true;
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}
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void InsetMathScript::removeScript(bool up)
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{
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if (nargs() == 2) {
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if (up == cell_1_is_up_)
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cells_.pop_back();
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} else if (nargs() == 3) {
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if (up == true) {
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swap(cells_[1], cells_[2]);
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cell_1_is_up_ = false;
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} else {
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cell_1_is_up_ = true;
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}
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cells_.pop_back();
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}
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}
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bool InsetMathScript::has(bool up) const
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{
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return idxOfScript(up);
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}
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bool InsetMathScript::hasUp() const
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{
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//lyxerr << "1up: " << bool(cell_1_is_up_));
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//lyxerr << "hasUp: " << bool(idxOfScript(true)));
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return idxOfScript(true);
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}
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bool InsetMathScript::hasDown() const
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{
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//LYXERR0("1up: " << bool(cell_1_is_up_));
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//LYXERR0("hasDown: " << bool(idxOfScript(false)));
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return idxOfScript(false);
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}
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Inset::idx_type InsetMathScript::idxOfScript(bool up) const
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{
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if (nargs() == 1)
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return 0;
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if (nargs() == 2)
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return (cell_1_is_up_ == up) ? 1 : 0;
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if (nargs() == 3)
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return up ? 1 : 2;
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LASSERT(false, return 0);
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}
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bool InsetMathScript::idxForward(Cursor &) const
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{
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return false;
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}
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bool InsetMathScript::idxBackward(Cursor &) const
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{
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return false;
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}
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bool InsetMathScript::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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// don't go up/down if there is no cell in this direction
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if (!has(up))
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return false;
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// go up/down only if in the last position
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// or in the first position of something with displayed limits
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if (cur.pos() == cur.lastpos() || (cur.pos() == 0 && hasLimits())) {
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cur.idx() = idxOfScript(up);
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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 (cur.idx() == idxOfScript(true)) {
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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 last position in the nucleus
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cur.idx() = 0;
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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 (cur.idx() == idxOfScript(false)) {
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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 last position in the nucleus
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cur.idx() = 0;
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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 InsetMathScript::write(WriteStream & os) const
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{
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MathEnsurer ensurer(os);
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if (!nuc().empty()) {
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os << nuc();
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//if (nuc().back()->takesLimits()) {
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if (limits_ == -1)
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os << "\\nolimits ";
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if (limits_ == 1)
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os << "\\limits ";
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//}
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} else {
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if (os.firstitem())
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LYXERR(Debug::MATHED, "suppressing {} when writing");
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else
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os << "{}";
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}
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if (hasDown() /*&& !down().empty()*/)
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os << "_{" << down() << '}';
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if (hasUp() /*&& !up().empty()*/) {
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// insert space if up() is empty or an empty brace inset
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// (see bug 8305)
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if (os.latex() && (up().empty() ||
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(up().size() == 1 && up().back()->asBraceInset() &&
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up().back()->asBraceInset()->cell(0).empty())))
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os << "^ {}";
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else
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os << "^{" << up() << '}';
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}
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if (lock_ && !os.latex())
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os << "\\lyxlock ";
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}
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void InsetMathScript::normalize(NormalStream & os) const
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{
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bool d = hasDown() && !down().empty();
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bool u = hasUp() && !up().empty();
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if (u && d)
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os << "[subsup ";
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else if (u)
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os << "[sup ";
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else if (d)
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os << "[sub ";
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if (!nuc().empty())
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os << nuc() << ' ';
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|
else
|
|
os << "[par]";
|
|
|
|
if (u && d)
|
|
os << down() << ' ' << up() << ']';
|
|
else if (d)
|
|
os << down() << ']';
|
|
else if (u)
|
|
os << up() << ']';
|
|
}
|
|
|
|
|
|
void InsetMathScript::maple(MapleStream & os) const
|
|
{
|
|
if (!nuc().empty())
|
|
os << nuc();
|
|
if (hasDown() && !down().empty())
|
|
os << '[' << down() << ']';
|
|
if (hasUp() && !up().empty())
|
|
os << "^(" << up() << ')';
|
|
}
|
|
|
|
|
|
void InsetMathScript::mathematica(MathematicaStream & os) const
|
|
{
|
|
bool d = hasDown() && !down().empty();
|
|
bool u = hasUp() && !up().empty();
|
|
|
|
if (!nuc().empty()) {
|
|
if (d)
|
|
os << "Subscript[" << nuc();
|
|
else
|
|
os << nuc();
|
|
}
|
|
|
|
if (u)
|
|
os << "^(" << up() << ')';
|
|
|
|
if (!nuc().empty()) {
|
|
if (d)
|
|
os << ',' << down() << ']';
|
|
}
|
|
}
|
|
|
|
|
|
void InsetMathScript::mathmlize(MathStream & os) const
|
|
{
|
|
bool d = hasDown() && !down().empty();
|
|
bool u = hasUp() && !up().empty();
|
|
bool l = hasLimits();
|
|
|
|
if (u && d)
|
|
os << MTag(l ? "munderover" : "msubsup");
|
|
else if (u)
|
|
os << MTag(l ? "mover" : "msup");
|
|
else if (d)
|
|
os << MTag(l ? "munder" : "msub");
|
|
|
|
if (!nuc().empty())
|
|
os << MTag("mrow") << nuc() << ETag("mrow");
|
|
else
|
|
os << "<mrow />";
|
|
|
|
if (u && d)
|
|
os << MTag("mrow") << down() << ETag("mrow")
|
|
<< MTag("mrow") << up() << ETag("mrow")
|
|
<< ETag(l ? "munderover" : "msubsup");
|
|
else if (u)
|
|
os << MTag("mrow") << up() << ETag("mrow") << ETag(l ? "mover" : "msup");
|
|
else if (d)
|
|
os << MTag("mrow") << down() << ETag("mrow") << ETag(l ? "munder" : "msub");
|
|
}
|
|
|
|
|
|
void InsetMathScript::htmlize(HtmlStream & os) const
|
|
{
|
|
bool d = hasDown() && !down().empty();
|
|
bool u = hasUp() && !up().empty();
|
|
|
|
if (!nuc().empty())
|
|
os << nuc();
|
|
|
|
if (u && d)
|
|
os << MTag("span", "class='scripts'")
|
|
<< MTag("span") << up() << ETag("span")
|
|
<< MTag("span") << down() << ETag("span")
|
|
<< ETag("span");
|
|
else if (u)
|
|
os << MTag("sup", "class='math'") << up() << ETag("sup");
|
|
else if (d)
|
|
os << MTag("sub", "class='math'") << down() << ETag("sub");
|
|
}
|
|
|
|
|
|
void InsetMathScript::octave(OctaveStream & os) const
|
|
{
|
|
if (!nuc().empty())
|
|
os << nuc();
|
|
if (hasDown() && !down().empty())
|
|
os << '[' << down() << ']';
|
|
if (hasUp() && !up().empty())
|
|
os << "^(" << up() << ')';
|
|
}
|
|
|
|
|
|
void InsetMathScript::infoize(odocstream & os) const
|
|
{
|
|
os << "Scripts";
|
|
}
|
|
|
|
|
|
void InsetMathScript::infoize2(odocstream & os) const
|
|
{
|
|
if (limits_)
|
|
os << from_ascii(limits_ == 1 ? ", Displayed limits" : ", Inlined limits");
|
|
}
|
|
|
|
|
|
bool InsetMathScript::notifyCursorLeaves(Cursor const & old, Cursor & cur)
|
|
{
|
|
InsetMathNest::notifyCursorLeaves(old, cur);
|
|
|
|
//LYXERR0("InsetMathScript::notifyCursorLeaves: 1 " << cur);
|
|
|
|
// Remove empty scripts if possible:
|
|
|
|
// The case of two scripts, but only one got empty (1 = super, 2 = sub).
|
|
// We keep the script inset, but remove the empty script.
|
|
if (nargs() > 2 && (!cell(1).empty() || !cell(2).empty())) {
|
|
if (cell(2).empty()) {
|
|
// must be a subscript...
|
|
old.recordUndoInset();
|
|
removeScript(false);
|
|
cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
|
|
return true;
|
|
} else if (cell(1).empty()) {
|
|
// must be a superscript...
|
|
old.recordUndoInset();
|
|
removeScript(true);
|
|
cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
|
|
return true;
|
|
}
|
|
}
|
|
// Now the two suicide cases:
|
|
// * we have only one script which is empty
|
|
// * we have two scripts which are both empty.
|
|
// The script inset is removed completely.
|
|
if ((nargs() == 2 && cell(1).empty())
|
|
|| (nargs() == 3 && cell(1).empty() && cell(2).empty())) {
|
|
// Make undo step. We cannot use cur for this because
|
|
// it does not necessarily point to us anymore. But we
|
|
// should be on top of the cursor old.
|
|
Cursor insetCur = old;
|
|
int scriptSlice = insetCur.find(this);
|
|
LASSERT(scriptSlice != -1, /**/);
|
|
insetCur.cutOff(scriptSlice);
|
|
insetCur.recordUndoInset();
|
|
|
|
// Let the script inset commit suicide. This is
|
|
// modelled on Cursor.pullArg(), but tries not to
|
|
// invoke notifyCursorLeaves again and does not touch
|
|
// cur (since the top slice will be deleted
|
|
// afterwards)
|
|
MathData ar = cell(0);
|
|
insetCur.pop();
|
|
insetCur.cell().erase(insetCur.pos());
|
|
insetCur.cell().insert(insetCur.pos(), ar);
|
|
|
|
// redraw
|
|
cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
|
|
return true;
|
|
}
|
|
|
|
//LYXERR0("InsetMathScript::notifyCursorLeaves: 2 " << cur);
|
|
return false;
|
|
}
|
|
|
|
|
|
void InsetMathScript::doDispatch(Cursor & cur, FuncRequest & cmd)
|
|
{
|
|
//LYXERR("InsetMathScript: request: " << cmd);
|
|
|
|
if (cmd.action() == LFUN_MATH_LIMITS) {
|
|
cur.recordUndoInset();
|
|
if (!cmd.argument().empty()) {
|
|
if (cmd.argument() == "limits")
|
|
limits_ = 1;
|
|
else if (cmd.argument() == "nolimits")
|
|
limits_ = -1;
|
|
else
|
|
limits_ = 0;
|
|
} else if (limits_ == 0)
|
|
limits_ = hasLimits() ? -1 : 1;
|
|
else
|
|
limits_ = 0;
|
|
return;
|
|
}
|
|
|
|
InsetMathNest::doDispatch(cur, cmd);
|
|
}
|
|
|
|
|
|
bool InsetMathScript::getStatus(Cursor & cur, FuncRequest const & cmd,
|
|
FuncStatus & flag) const
|
|
{
|
|
if (cmd.action() == LFUN_MATH_LIMITS) {
|
|
if (!cmd.argument().empty()) {
|
|
if (cmd.argument() == "limits")
|
|
flag.setOnOff(limits_ == 1);
|
|
else if (cmd.argument() == "nolimits")
|
|
flag.setOnOff(limits_ == -1);
|
|
else
|
|
flag.setOnOff(limits_ == 0);
|
|
}
|
|
flag.setEnabled(true);
|
|
return true;
|
|
}
|
|
|
|
return InsetMathNest::getStatus(cur, cmd, flag);
|
|
}
|
|
|
|
|
|
// the idea for dual scripts came from the eLyXer code
|
|
void InsetMathScript::validate(LaTeXFeatures & features) const
|
|
{
|
|
if (features.runparams().math_flavor == OutputParams::MathAsHTML)
|
|
features.addCSSSnippet(
|
|
"span.scripts{display: inline-block; vertical-align: middle; text-align:center; font-size: 75%;}\n"
|
|
"span.scripts span {display: block;}\n"
|
|
"sub.math{font-size: 75%;}\n"
|
|
"sup.math{font-size: 75%;}");
|
|
InsetMathNest::validate(features);
|
|
}
|
|
|
|
} // namespace lyx
|