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https://git.lyx.org/repos/lyx.git
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07aca7cccc
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@32717 a592a061-630c-0410-9148-cb99ea01b6c8
576 lines
14 KiB
C++
576 lines
14 KiB
C++
/**
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* \file InsetMathFracBase.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 Alejandro Aguilar Sierra
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* \author André Pönitz
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* \author Uwe Stöhr
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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 "InsetMathFrac.h"
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#include "Cursor.h"
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#include "LaTeXFeatures.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 "MetricsInfo.h"
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#include "TextPainter.h"
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#include "frontends/Painter.h"
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using namespace std;
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namespace lyx {
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/////////////////////////////////////////////////////////////////////
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//
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// InsetMathFracBase
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//
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/////////////////////////////////////////////////////////////////////
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InsetMathFracBase::InsetMathFracBase(Buffer * buf, idx_type ncells)
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: InsetMathNest(buf, ncells)
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{}
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bool InsetMathFracBase::idxUpDown(Cursor & cur, bool up) const
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{
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// If we only have one cell, target = 0, otherwise
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// target = up ? 0 : 1, since upper cell has idx 0
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InsetMath::idx_type target = nargs() > 1 ? !up : 0;
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if (cur.idx() == target)
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return false;
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cur.idx() = target;
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cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
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return true;
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}
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/////////////////////////////////////////////////////////////////////
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//
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// InsetMathFrac
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//
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/////////////////////////////////////////////////////////////////////
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InsetMathFrac::InsetMathFrac(Buffer * buf, Kind kind, InsetMath::idx_type ncells)
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: InsetMathFracBase(buf, ncells), kind_(kind)
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{}
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Inset * InsetMathFrac::clone() const
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{
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return new InsetMathFrac(*this);
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}
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InsetMathFrac * InsetMathFrac::asFracInset()
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{
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return kind_ == ATOP ? 0 : this;
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}
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InsetMathFrac const * InsetMathFrac::asFracInset() const
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{
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return kind_ == ATOP ? 0 : this;
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}
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bool InsetMathFrac::idxForward(Cursor & cur) const
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{
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InsetMath::idx_type target = 0;
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if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
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if (nargs() == 3)
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target = 0;
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else if (nargs() == 2)
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target = 1;
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} else
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return false;
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if (cur.idx() == target)
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return false;
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cur.idx() = target;
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cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
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return true;
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}
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bool InsetMathFrac::idxBackward(Cursor & cur) const
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{
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InsetMath::idx_type target = 0;
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if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
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if (nargs() == 3)
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target = 2;
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else if (nargs() == 2)
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target = 0;
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} else
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return false;
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if (cur.idx() == target)
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return false;
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cur.idx() = target;
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cur.pos() = cell(target).x2pos(&cur.bv(), cur.x_target());
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return true;
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}
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void InsetMathFrac::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Dimension dim0, dim1, dim2;
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if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
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if (nargs() == 1) {
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ShapeChanger dummy2(mi.base.font, UP_SHAPE);
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cell(0).metrics(mi, dim0);
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dim.wid = dim0.width()+ 3;
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dim.asc = dim0.asc;
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dim.des = dim0.des;
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} else if (nargs() == 2) {
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cell(0).metrics(mi, dim0);
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ShapeChanger dummy2(mi.base.font, UP_SHAPE);
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cell(1).metrics(mi, dim1);
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dim.wid = dim0.width() + dim1.wid + 5;
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dim.asc = max(dim0.asc, dim1.asc);
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dim.des = max(dim0.des, dim1.des);
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} else {
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cell(2).metrics(mi, dim2);
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ShapeChanger dummy2(mi.base.font, UP_SHAPE);
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FracChanger dummy(mi.base);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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dim.wid = dim0.width() + dim1.wid + dim2.wid + 10;
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dim.asc = max(dim2.asc, dim0.height() + 5);
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dim.des = max(dim2.des, dim1.height() - 5);
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}
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} else {
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// general cell metrics used for \frac
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FracChanger dummy(mi.base);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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if (nargs() == 3)
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cell(2).metrics(mi, dim2);
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// metrics for special fraction types
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if (kind_ == NICEFRAC) {
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dim.wid = dim0.width() + dim1.wid + 5;
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dim.asc = dim0.height() + 5;
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dim.des = dim1.height() - 5;
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} else if (kind_ == UNITFRAC) {
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ShapeChanger dummy2(mi.base.font, UP_SHAPE);
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dim.wid = dim0.width() + dim1.wid + 5;
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dim.asc = dim0.height() + 5;
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dim.des = dim1.height() - 5;
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} else {
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if (kind_ == CFRAC || kind_ == CFRACLEFT
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|| kind_ == CFRACRIGHT || kind_ == DFRAC) {
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// \cfrac and \dfrac are always in display size
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StyleChanger dummy2(mi.base, LM_ST_DISPLAY);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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} else if (kind_ == TFRAC) {
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// tfrac is in always in text size
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StyleChanger dummy2(mi.base, LM_ST_SCRIPT);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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}
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dim.wid = max(dim0.wid, dim1.wid) + 2;
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dim.asc = dim0.height() + 2 + 5;
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dim.des = dim1.height() + 2 - 5;
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}
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}
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metricsMarkers(dim);
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}
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void InsetMathFrac::draw(PainterInfo & pi, int x, int y) const
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{
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setPosCache(pi, x, y);
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Dimension const dim = dimension(*pi.base.bv);
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Dimension const dim0 = cell(0).dimension(*pi.base.bv);
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if (kind_ == UNIT || (kind_ == UNITFRAC && nargs() == 3)) {
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if (nargs() == 1) {
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ShapeChanger dummy2(pi.base.font, UP_SHAPE);
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cell(0).draw(pi, x + 1, y);
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} else if (nargs() == 2) {
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cell(0).draw(pi, x + 1, y);
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ShapeChanger dummy2(pi.base.font, UP_SHAPE);
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cell(1).draw(pi, x + dim0.width() + 5, y);
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} else {
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cell(2).draw(pi, x + 1, y);
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ShapeChanger dummy2(pi.base.font, UP_SHAPE);
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FracChanger dummy(pi.base);
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Dimension const dim1 = cell(1).dimension(*pi.base.bv);
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Dimension const dim2 = cell(2).dimension(*pi.base.bv);
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int xx = x + dim2.wid + 5;
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cell(0).draw(pi, xx + 2,
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y - dim0.des - 5);
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cell(1).draw(pi, xx + dim0.width() + 5,
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y + dim1.asc / 2);
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}
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} else {
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FracChanger dummy(pi.base);
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Dimension const dim1 = cell(1).dimension(*pi.base.bv);
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int m = x + dim.wid / 2;
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if (kind_ == NICEFRAC) {
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cell(0).draw(pi, x + 2,
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y - dim0.des - 5);
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cell(1).draw(pi, x + dim0.width() + 5,
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y + dim1.asc / 2);
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} else if (kind_ == UNITFRAC) {
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ShapeChanger dummy2(pi.base.font, UP_SHAPE);
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cell(0).draw(pi, x + 2, y - dim0.des - 5);
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cell(1).draw(pi, x + dim0.width() + 5, y + dim1.asc / 2);
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} else if (kind_ == FRAC || kind_ == ATOP || kind_ == OVER) {
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 2 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 2 - 5);
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} else if (kind_ == TFRAC) {
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// tfrac is in always in text size
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StyleChanger dummy2(pi.base, LM_ST_SCRIPT);
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 2 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 2 - 5);
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} else {
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// \cfrac and \dfrac are always in display size
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StyleChanger dummy2(pi.base, LM_ST_DISPLAY);
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if (kind_ == CFRAC || kind_ == DFRAC)
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 2 - 5);
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else if (kind_ == CFRACLEFT)
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cell(0).draw(pi, x + 2, y - dim0.des - 2 - 5);
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else if (kind_ == CFRACRIGHT)
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cell(0).draw(pi, x + dim.wid - dim0.wid - 2,
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y - dim0.des - 2 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 2 - 5);
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}
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}
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if (kind_ == NICEFRAC || kind_ == UNITFRAC) {
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// Diag line:
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int xx = x;
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if (nargs() == 3)
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xx += cell(2).dimension(*pi.base.bv).wid + 5;
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pi.pain.line(xx + dim0.wid,
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y + dim.des - 2,
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xx + dim0.wid + 5,
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y - dim.asc + 2, Color_math);
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}
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if (kind_ == FRAC || kind_ == CFRAC || kind_ == CFRACLEFT
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|| kind_ == CFRACRIGHT || kind_ == DFRAC
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|| kind_ == TFRAC || kind_ == OVER)
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pi.pain.line(x + 1, y - 5,
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x + dim.wid - 2, y - 5, Color_math);
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drawMarkers(pi, x, y);
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}
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void InsetMathFrac::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
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{
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Dimension dim0, dim1;
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cell(0).metricsT(mi, dim0);
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cell(1).metricsT(mi, dim1);
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dim.wid = max(dim0.width(), dim1.wid);
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dim.asc = dim0.height() + 1;
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dim.des = dim1.height();
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}
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void InsetMathFrac::drawT(TextPainter & /*pain*/, int /*x*/, int /*y*/) const
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{
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// FIXME: BROKEN!
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/*
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Dimension dim;
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int m = x + dim.width() / 2;
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cell(0).drawT(pain, m - dim0.width() / 2, y - dim0.des - 1);
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cell(1).drawT(pain, m - dim1.wid / 2, y + dim1.asc);
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// ASCII art: ignore niceties
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if (kind_ == FRAC || kind_ == OVER || kind_ == NICEFRAC || kind_ == UNITFRAC)
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pain.horizontalLine(x, y, dim.width());
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*/
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}
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void InsetMathFrac::write(WriteStream & os) const
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{
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MathEnsurer ensurer(os);
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switch (kind_) {
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case ATOP:
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// \\atop is only for compatibility, \\binom is the
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// LaTeX2e successor
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os << '{' << cell(0) << "\\atop " << cell(1) << '}';
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break;
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case OVER:
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// \\over is only for compatibility, normalize this to \\frac
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os << "\\frac{" << cell(0) << "}{" << cell(1) << '}';
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break;
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case FRAC:
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case DFRAC:
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case TFRAC:
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case NICEFRAC:
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case CFRAC:
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case UNITFRAC:
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if (nargs() == 2)
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InsetMathNest::write(os);
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else
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os << "\\unitfrac[" << cell(2) << "]{" << cell(0) << "}{" << cell(1) << '}';
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break;
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case UNIT:
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if (nargs() == 2)
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os << "\\unit[" << cell(0) << "]{" << cell(1) << '}';
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else
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os << "\\unit{" << cell(0) << '}';
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break;
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case CFRACLEFT:
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os << "\\cfrac[l]{" << cell(0) << "}{" << cell(1) << '}';
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break;
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case CFRACRIGHT:
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os << "\\cfrac[r]{" << cell(0) << "}{" << cell(1) << '}';
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break;
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}
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}
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docstring InsetMathFrac::name() const
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{
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switch (kind_) {
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case FRAC:
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return from_ascii("frac");
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case CFRAC:
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case CFRACLEFT:
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case CFRACRIGHT:
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return from_ascii("cfrac");
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case DFRAC:
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return from_ascii("dfrac");
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case TFRAC:
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return from_ascii("tfrac");
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case OVER:
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return from_ascii("over");
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case NICEFRAC:
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return from_ascii("nicefrac");
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case UNITFRAC:
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return from_ascii("unitfrac");
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case UNIT:
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return from_ascii("unit");
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case ATOP:
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return from_ascii("atop");
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}
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// shut up stupid compiler
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return docstring();
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}
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bool InsetMathFrac::extraBraces() const
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{
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return kind_ == ATOP || kind_ == OVER;
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}
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void InsetMathFrac::maple(MapleStream & os) const
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{
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os << '(' << cell(0) << ")/(" << cell(1) << ')';
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}
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void InsetMathFrac::mathematica(MathematicaStream & os) const
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{
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os << '(' << cell(0) << ")/(" << cell(1) << ')';
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}
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void InsetMathFrac::octave(OctaveStream & os) const
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{
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os << '(' << cell(0) << ")/(" << cell(1) << ')';
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}
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void InsetMathFrac::mathmlize(MathStream & os) const
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{
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os << MTag("mfrac")
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<< MTag("mrow") << cell(0) << ETag("mrow")
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<< MTag("mrow") << cell(1) << ETag("mrow")
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<< ETag("mfrac");
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}
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void InsetMathFrac::validate(LaTeXFeatures & features) const
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{
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if (kind_ == NICEFRAC || kind_ == UNITFRAC || kind_ == UNIT)
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features.require("units");
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if (kind_ == CFRAC || kind_ == CFRACLEFT || kind_ == CFRACRIGHT
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|| kind_ == DFRAC || kind_ == TFRAC)
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features.require("amsmath");
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InsetMathNest::validate(features);
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}
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/////////////////////////////////////////////////////////////////////
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//
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// InsetMathBinom
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//
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/////////////////////////////////////////////////////////////////////
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InsetMathBinom::InsetMathBinom(Buffer * buf, Kind kind)
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: InsetMathFracBase(buf), kind_(kind)
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{}
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Inset * InsetMathBinom::clone() const
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{
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return new InsetMathBinom(*this);
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}
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int InsetMathBinom::dw(int height) const
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{
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int w = height / 5;
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if (w > 15)
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w = 15;
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if (w < 6)
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w = 6;
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return w;
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}
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void InsetMathBinom::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Dimension dim0, dim1;
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// FIXME: for an unknown reason the cells must be set directly
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// after the StyleChanger and cannot be set after the if case
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if (kind_ == DBINOM) {
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StyleChanger dummy(mi.base, LM_ST_DISPLAY);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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} else if (kind_ == TBINOM) {
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StyleChanger dummy(mi.base, LM_ST_SCRIPT);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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} else {
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FracChanger dummy(mi.base);
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cell(0).metrics(mi, dim0);
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cell(1).metrics(mi, dim1);
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}
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dim.asc = dim0.height() + 4 + 5;
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dim.des = dim1.height() + 4 - 5;
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dim.wid = max(dim0.wid, dim1.wid) + 2 * dw(dim.height()) + 4;
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metricsMarkers2(dim);
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}
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void InsetMathBinom::draw(PainterInfo & pi, int x, int y) const
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{
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Dimension const dim = dimension(*pi.base.bv);
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Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
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Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
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// define the binom brackets
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docstring const bra = kind_ == BRACE ? from_ascii("{") :
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kind_ == BRACK ? from_ascii("[") : from_ascii("(");
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docstring const ket = kind_ == BRACE ? from_ascii("}") :
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kind_ == BRACK ? from_ascii("]") : from_ascii(")");
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int m = x + dim.width() / 2;
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// FIXME: for an unknown reason the cells must be drawn directly
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// after the StyleChanger and cannot be drawn after the if case
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if (kind_ == DBINOM) {
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StyleChanger dummy(pi.base, LM_ST_DISPLAY);
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
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} else if (kind_ == TBINOM) {
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StyleChanger dummy(pi.base, LM_ST_SCRIPT);
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cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
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cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
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} else {
|
|
FracChanger dummy2(pi.base);
|
|
cell(0).draw(pi, m - dim0.wid / 2, y - dim0.des - 3 - 5);
|
|
cell(1).draw(pi, m - dim1.wid / 2, y + dim1.asc + 3 - 5);
|
|
}
|
|
// draw the brackets and the marker
|
|
mathed_draw_deco(pi, x, y - dim.ascent(), dw(dim.height()),
|
|
dim.height(), bra);
|
|
mathed_draw_deco(pi, x + dim.width() - dw(dim.height()),
|
|
y - dim.ascent(), dw(dim.height()), dim.height(), ket);
|
|
drawMarkers2(pi, x, y);
|
|
}
|
|
|
|
|
|
bool InsetMathBinom::extraBraces() const
|
|
{
|
|
return kind_ == CHOOSE || kind_ == BRACE || kind_ == BRACK;
|
|
}
|
|
|
|
|
|
void InsetMathBinom::write(WriteStream & os) const
|
|
{
|
|
MathEnsurer ensurer(os);
|
|
switch (kind_) {
|
|
case BINOM:
|
|
os << "\\binom{" << cell(0) << "}{" << cell(1) << '}';
|
|
break;
|
|
case DBINOM:
|
|
os << "\\dbinom{" << cell(0) << "}{" << cell(1) << '}';
|
|
break;
|
|
case TBINOM:
|
|
os << "\\tbinom{" << cell(0) << "}{" << cell(1) << '}';
|
|
break;
|
|
case CHOOSE:
|
|
os << '{' << cell(0) << " \\choose " << cell(1) << '}';
|
|
break;
|
|
case BRACE:
|
|
os << '{' << cell(0) << " \\brace " << cell(1) << '}';
|
|
break;
|
|
case BRACK:
|
|
os << '{' << cell(0) << " \\brack " << cell(1) << '}';
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void InsetMathBinom::normalize(NormalStream & os) const
|
|
{
|
|
os << "[binom " << cell(0) << ' ' << cell(1) << ']';
|
|
}
|
|
|
|
|
|
void InsetMathBinom::mathmlize(MathStream & os) const
|
|
{
|
|
char ldelim = ' ';
|
|
char rdelim = ' ';
|
|
switch (kind_) {
|
|
case BINOM:
|
|
case TBINOM:
|
|
case DBINOM:
|
|
case CHOOSE:
|
|
ldelim = '(';
|
|
rdelim = ')';
|
|
break;
|
|
case BRACE:
|
|
ldelim = '{';
|
|
rdelim = '}';
|
|
break;
|
|
case BRACK:
|
|
ldelim = '[';
|
|
rdelim = ']';
|
|
break;
|
|
}
|
|
os << "<mo fence='true' stretchy='true' form='prefix'>" << ldelim << "</mo>"
|
|
<< "<mfrac linethickness='0'>"
|
|
<< cell(0) << cell(1)
|
|
<< "</mfrac>"
|
|
<< "<mo fence='true' stretchy='true' form='postfix'>" << rdelim << "</mo>";
|
|
}
|
|
|
|
|
|
void InsetMathBinom::validate(LaTeXFeatures & features) const
|
|
{
|
|
if (kind_ == BINOM)
|
|
features.require("binom");
|
|
if (kind_ == DBINOM || kind_ == TBINOM)
|
|
features.require("amsmath");
|
|
InsetMathNest::validate(features);
|
|
}
|
|
|
|
|
|
} // namespace lyx
|