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317 lines
8.9 KiB
C++
317 lines
8.9 KiB
C++
/**
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* \file InsetMathDecoration.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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*
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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 "InsetMathDecoration.h"
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#include "InsetMathChar.h"
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#include "MathData.h"
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#include "MathParser.h"
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#include "MathSupport.h"
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#include "MathStream.h"
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#include "MetricsInfo.h"
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#include "BufferView.h"
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#include "LaTeXFeatures.h"
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#include "support/debug.h"
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#include "support/docstring.h"
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#include "support/gettext.h"
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#include "support/lassert.h"
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#include "support/lstrings.h"
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#include <algorithm>
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#include <ostream>
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using namespace lyx::support;
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using namespace std;
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namespace lyx {
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InsetMathDecoration::InsetMathDecoration(Buffer * buf, latexkeys const * key)
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: InsetMathNest(buf, 1), key_(key)
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{
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// lyxerr << " creating deco " << key->name << endl;
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}
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Inset * InsetMathDecoration::clone() const
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{
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return new InsetMathDecoration(*this);
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}
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bool InsetMathDecoration::upper() const
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{
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return key_->name.substr(0, 5) != "under" && key_->name != "utilde";
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}
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MathClass InsetMathDecoration::mathClass() const
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{
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if (key_->name == "overbrace" || key_->name == "underbrace")
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return MC_OP;
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return MC_ORD;
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}
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Limits InsetMathDecoration::defaultLimits(bool /*display*/) const
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{
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if (allowsLimitsChange())
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return LIMITS;
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else
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return NO_LIMITS;
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}
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bool InsetMathDecoration::protect() const
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{
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return
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key_->name == "overbrace" ||
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key_->name == "underbrace" ||
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key_->name == "overleftarrow" ||
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key_->name == "overrightarrow" ||
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key_->name == "overleftrightarrow" ||
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key_->name == "underleftarrow" ||
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key_->name == "underrightarrow" ||
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key_->name == "underleftrightarrow";
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}
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bool InsetMathDecoration::wide() const
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{
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return
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key_->name == "overline" ||
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key_->name == "underline" ||
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key_->name == "overbrace" ||
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key_->name == "underbrace" ||
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key_->name == "overleftarrow" ||
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key_->name == "overrightarrow" ||
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key_->name == "overleftrightarrow" ||
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key_->name == "widehat" ||
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key_->name == "widetilde" ||
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key_->name == "underleftarrow" ||
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key_->name == "underrightarrow" ||
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key_->name == "underleftrightarrow" ||
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key_->name == "undertilde" ||
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key_->name == "utilde";
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}
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InsetMath::mode_type InsetMathDecoration::currentMode() const
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{
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return key_->name == "underbar" ? TEXT_MODE : MATH_MODE;
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}
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void InsetMathDecoration::metrics(MetricsInfo & mi, Dimension & dim) const
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{
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Changer dummy = mi.base.changeEnsureMath(currentMode());
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cell(0).metrics(mi, dim);
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int const l1 = mi.base.bv->zoomedPixels(1);
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int const l2 = mathed_char_width(mi.base.font, 'x') - l1;
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int const l3 = l2;
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dh_ = l2; //mathed_char_height(LM_TC_VAR, mi, 'I', ascent_, descent_);
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dw_ = l3; //mathed_char_width(LM_TC_VAR, mi, 'x');
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if (upper()) {
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dy_ = -dim.asc - dh_ - l1;
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dim.asc += dh_ + l1;
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} else {
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dy_ = dim.des + l1;
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dim.des += dh_ + l2;
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}
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}
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void InsetMathDecoration::draw(PainterInfo & pi, int x, int y) const
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{
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Changer dummy = pi.base.changeEnsureMath(currentMode());
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cell(0).draw(pi, x, y);
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Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
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if (wide()) {
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mathed_draw_deco(pi, x, y + dy_, dim0.wid, dh_, key_->name);
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return;
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}
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// Lacking the necessary font parameters, in order to properly align
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// the decoration we have to resort to heuristics for choosing a
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// suitable value for shift
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char_type c = (cell(0).empty() || !cell(0)[0]->asCharInset())
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? 0 : cell(0)[0]->asCharInset()->getChar();
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double slope = (c == 0) ? 0.0 : mathed_char_slope(pi.base, c);
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int kerning = (c == 0) ? 0 : mathed_char_kerning(pi.base.font, c);
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int shift = (kerning == 0) ? int(dim0.asc * slope) : kerning;
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mathed_draw_deco(pi, x + (dim0.wid - dw_) / 2 + shift,
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y + dy_, dw_, dh_, key_->name);
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}
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void InsetMathDecoration::write(TeXMathStream & os) const
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{
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MathEnsurer ensurer(os);
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if (os.fragile() && protect())
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os << "\\protect";
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os << '\\' << key_->name << '{';
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ModeSpecifier specifier(os, currentMode());
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os << cell(0) << '}';
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writeLimits(os);
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}
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void InsetMathDecoration::normalize(NormalStream & os) const
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{
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os << "[deco " << key_->name << ' ' << cell(0) << ']';
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}
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void InsetMathDecoration::infoize(odocstream & os) const
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{
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os << bformat(_("Decoration: %1$s"), key_->name);
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}
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namespace {
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struct Attributes {
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Attributes() : over(false) {}
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Attributes(bool o, string const & t, string const & entity)
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: over(o), tag(t), entity(entity) {}
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bool over;
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string tag;
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string entity;
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};
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typedef map<string, Attributes> TranslationMap;
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void buildTranslationMap(TranslationMap & t) {
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// the decorations we need to support are listed in lib/symbols
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t["acute"] = Attributes(true, "´", "´");
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t["bar"] = Attributes(true, "‾", "¯");
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t["breve"] = Attributes(true, "˘", "˘");
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t["check"] = Attributes(true, "ˇ", "ˇ");
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t["ddddot"] = Attributes(true, "⃜", "⃜");
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t["dddot"] = Attributes(true, "⃛", "⃛");
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t["ddot"] = Attributes(true, "¨", "¨");
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t["dot"] = Attributes(true, "˙", "˙");
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t["grave"] = Attributes(true, "`", "`");
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t["hat"] = Attributes(true, "ˆ", "ˆ");
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t["mathring"] = Attributes(true, "˚", "˚");
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t["overbrace"] = Attributes(true, "⏞", "⏞");
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t["overleftarrow"] = Attributes(true, "⟵", "⟵");
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t["overleftrightarrow"] = Attributes(true, "⟷", "⟷");
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t["overline"] = Attributes(true, "¯", "¯");
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t["overrightarrow"] = Attributes(true, "⟶", "⟶");
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t["tilde"] = Attributes(true, "˜", "˜");
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t["underbar"] = Attributes(false, "_", "̲");
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t["underbrace"] = Attributes(false, "⏟", "⏟");
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t["underleftarrow"] = Attributes(false, "⟵", "⟵");
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t["underleftrightarrow"] = Attributes(false, "⟷", "⟷");
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// this is the macron, again, but it works
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t["underline"] = Attributes(false, "¯", "¯");
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t["underrightarrow"] = Attributes(false, "⟶", "⟶");
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t["undertilde"] = Attributes(false, "∼", "∼");
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t["utilde"] = Attributes(false, "∼", "∼");
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t["vec"] = Attributes(true, "→", "→");
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t["widehat"] = Attributes(true, "^", "^");
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t["widetilde"] = Attributes(true, "∼", "∼");
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}
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TranslationMap const & translationMap() {
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static TranslationMap t;
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if (t.empty())
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buildTranslationMap(t);
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return t;
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}
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} // namespace
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void InsetMathDecoration::mathmlize(MathMLStream & ms) const
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{
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TranslationMap const & t = translationMap();
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TranslationMap::const_iterator cur = t.find(to_utf8(key_->name));
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LASSERT(cur != t.end(), return);
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char const * const outag = cur->second.over ? "mover" : "munder";
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std::string decoration = ms.xmlMode() ? cur->second.entity : cur->second.tag;
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ms << MTag(outag)
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<< cell(0)
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<< "<" << from_ascii(ms.namespacedTag("mo")) << " stretchy=\"true\">"
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<< from_ascii(decoration)
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<< "</" << from_ascii(ms.namespacedTag("mo")) << ">"
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<< ETag(outag);
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}
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void InsetMathDecoration::htmlize(HtmlStream & os) const
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{
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string const name = to_utf8(key_->name);
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if (name == "bar") {
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os << MTag("span", "class='overbar'") << cell(0) << ETag("span");
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return;
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}
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if (name == "underbar" || name == "underline") {
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os << MTag("span", "class='underbar'") << cell(0) << ETag("span");
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return;
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}
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TranslationMap const & t = translationMap();
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TranslationMap::const_iterator cur = t.find(name);
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LASSERT(cur != t.end(), return);
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bool symontop = cur->second.over;
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string const symclass = symontop ? "symontop" : "symonbot";
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os << MTag("span", "class='symbolpair " + symclass + "'")
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<< '\n';
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if (symontop)
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os << MTag("span", "class='symbol'") << from_ascii(cur->second.tag);
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else
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os << MTag("span", "class='base'") << cell(0);
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os << ETag("span") << '\n';
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if (symontop)
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os << MTag("span", "class='base'") << cell(0);
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else
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os << MTag("span", "class='symbol'") << from_ascii(cur->second.tag);
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os << ETag("span") << '\n' << ETag("span") << '\n';
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}
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// ideas borrowed from the eLyXer code
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void InsetMathDecoration::validate(LaTeXFeatures & features) const
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{
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if (features.runparams().math_flavor == OutputParams::MathAsHTML) {
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string const name = to_utf8(key_->name);
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if (name == "bar") {
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features.addCSSSnippet("span.overbar{border-top: thin black solid;}");
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} else if (name == "underbar" || name == "underline") {
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features.addCSSSnippet("span.underbar{border-bottom: thin black solid;}");
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} else {
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features.addCSSSnippet(
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"span.symbolpair{display: inline-block; text-align:center;}\n"
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"span.symontop{vertical-align: top;}\n"
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"span.symonbot{vertical-align: bottom;}\n"
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"span.symbolpair span{display: block;}\n"
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"span.symbol{height: 0.5ex;}");
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}
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} else {
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if (!key_->required.empty())
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features.require(key_->required);
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}
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InsetMathNest::validate(features);
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}
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} // namespace lyx
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