src/mathed/InsetMathXArrow.cpp

   1 /**
   2  * \file InsetMathXArrow.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathXArrow.h"
  14
  15 #include "MathData.h"
  16 #include "MathStream.h"
  17 #include "MathSupport.h"
  18
  19 #include "LaTeXFeatures.h"
  20 #include "MetricsInfo.h"
  21
  22 #include "support/debug.h"
  23 #include "support/lassert.h"
  24
  25 #include <algorithm>
  26
  27 using namespace std;
  28
  29 namespace lyx {
  30
  31
  32 InsetMathXArrow::InsetMathXArrow(Buffer * buf, docstring const & name)
  33         : InsetMathFracBase(buf), name_(name)
  34 {}
  35
  36
  37 Inset * InsetMathXArrow::clone() const
  38 {
  39         return new InsetMathXArrow(*this);
  40 }
  41
  42
  43 void InsetMathXArrow::metrics(MetricsInfo & mi, Dimension & dim) const
  44 {
  45         Changer dummy2 = mi.base.changeEnsureMath();
  46         Changer dummy = mi.base.changeScript();
  47         Dimension dim0;
  48         cell(0).metrics(mi, dim0);
  49         Dimension dim1;
  50         cell(1).metrics(mi, dim1);
  51         dim.wid = max(dim0.width(), dim1.width()) + 10;
  52         dim.asc = dim0.height() + 10;
  53         dim.des = dim1.height();
  54 }
  55
  56
  57 void InsetMathXArrow::draw(PainterInfo & pi, int x, int y) const
  58 {
  59         Changer dummy2 = pi.base.changeEnsureMath();
  60         Changer dummy = pi.base.changeScript();
  61         Dimension const dim = dimension(*pi.base.bv);
  62         Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
  63         // center the cells with the decoration
  64         cell(0).draw(pi, x + dim.width()/2 - dim0.width()/2, y - 10);
  65         Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
  66         cell(1).draw(pi, x + dim.width()/2 - dim1.width()/2, y + dim1.height());
  67         mathed_draw_deco(pi, x, y - 7, dim.wid, 5, name_);
  68 }
  69
  70
  71 void InsetMathXArrow::write(TeXMathStream & os) const
  72 {
  73         MathEnsurer ensurer(os);
  74         os << '\\' << name_;
  75         if (!cell(1).empty())
  76                 os << '[' << cell(1) << ']';
  77         os << '{' << cell(0) << '}';
  78 }
  79
  80
  81 void InsetMathXArrow::normalize(NormalStream & os) const
  82 {
  83         os << "[xarrow " << name_ << ' ' <<  cell(0) << ' ' << cell(1) << ']';
  84 }
  85
  86
  87 static std::map<string, string> latex_to_html_entities = {
  88                 {"xleftarrow", "&larr;"},
  89                 {"xrightarrow", "&rarr;"},
  90                 {"xhookleftarrow", "&larrhk;"},
  91                 {"xhookrightarrow", "&rarrhk;"},
  92                 {"xLeftarrow", "&lArr;"},
  93                 {"xRightarrow", "&rArr;"},
  94                 {"xleftrightarrow", "&leftrightarrow;"},
  95                 {"xLeftrightarrow", "&Leftrightarrow;"},
  96                 {"xleftharpoondown", "&leftharpoondown;"},
  97                 {"xleftharpoonup", "&leftharpoonup;"},
  98                 {"xleftrightharpoons", "&leftrightharpoons;"},
  99                 {"xrightharpoondown", "&rightharpoondown;"},
 100                 {"xrightharpoonup", "&rightharpoonup;"},
 101                 {"xrightleftharpoons", "&rightleftharpoons;"},
 102                 {"xmapsto", "&mapsto;"},
 103 };
 104
 105
 106 static std::map<string, string> latex_to_xml_entities = {
 107                 {"xleftarrow", "&#x2190;"},
 108                 {"xrightarrow", "&#x2192;"},
 109                 {"xhookleftarrow", "&#x21a9;"},
 110                 {"xhookrightarrow", "&#x21aa;"},
 111                 {"xLeftarrow", "&#x21d0;"},
 112                 {"xRightarrow", "&#x21d2;"},
 113                 {"xleftrightarrow", "&#x2194;"},
 114                 {"xLeftrightarrow", "&#x21d4;"},
 115                 {"xleftharpoondown", "&#x21bd;"},
 116                 {"xleftharpoonup", "&#x21bc;"},
 117                 {"xleftrightharpoons", "&#x21cb;"},
 118                 {"xrightharpoondown", "&#x21c1;"},
 119                 {"xrightharpoonup", "&#x21c0;"},
 120                 {"xrightleftharpoons", "&#x21cc;"},
 121                 {"xmapsto", "&#x21a6;"},
 122 };
 123
 124
 125 docstring map_latex_to(docstring latex, bool xml = false)
 126 {
 127         auto dict = (xml) ? latex_to_xml_entities : latex_to_html_entities;
 128
 129         auto mapping = dict.find(to_ascii(latex));
 130         if (mapping != dict.end()) {
 131                 return from_ascii(mapping->second);
 132         } else {
 133                 std::string format = (xml) ? "XML" : "HTML";
 134                 lyxerr << "mathmlize " << format << " conversion for '" << latex << "' not implemented" << endl;
 135                 LASSERT(false, return from_ascii(dict["xrightarrow"]));
 136                 return docstring();
 137         }
 138 }
 139
 140
 141 void InsetMathXArrow::mathmlize(MathMLStream & ms) const
 142 {
 143         docstring arrow = map_latex_to(name_, ms.xmlMode());
 144         ms << "<" << from_ascii(ms.namespacedTag("munderover")) << " accent='false' accentunder='false'>"
 145            << MTagInline("mo") << arrow << ETagInline("mo")
 146            << cell(1) << cell(0)
 147            << "</" << from_ascii(ms.namespacedTag("munderover"))<< ">";
 148 }
 149
 150
 151 void InsetMathXArrow::htmlize(HtmlStream & os) const
 152 {
 153         docstring arrow = map_latex_to(name_);
 154         os << MTag("span", "class='xarrow'")
 155            << MTag("span", "class='xatop'") << cell(0) << ETag("span")
 156            << MTag("span", "class='xabottom'") << arrow << ETag("span")
 157            << ETag("span");
 158 }
 159
 160
 161 void InsetMathXArrow::validate(LaTeXFeatures & features) const
 162 {
 163         if (name_ == "xleftarrow" || name_ == "xrightarrow")
 164                 features.require("amsmath");
 165         else
 166                 features.require("mathtools");
 167
 168         if (features.runparams().math_flavor == OutputParams::MathAsHTML)
 169                 // CSS adapted from eLyXer
 170                 features.addCSSSnippet(
 171                         "span.xarrow{display: inline-block; vertical-align: middle; text-align:center;}\n"
 172                         "span.xatop{display: block;}\n"
 173                         "span.xabottom{display: block;}");
 174         InsetMathNest::validate(features);
 175 }
 176
 177
 178 } // namespace lyx