Make undo action no-ops when the buffer is read-only

[lyx.git] / src / mathed / InsetMathXArrow.cpp

diff --git a/src/mathed/InsetMathXArrow.cpp b/src/mathed/InsetMathXArrow.cpp
index 97bff1ec760b31ba2856528add01d868e250ffda..c150a4454cf86f086671b0d8ef06e64958739600 100644 (file)
--- a/src/mathed/InsetMathXArrow.cpp
+++ b/src/mathed/InsetMathXArrow.cpp
@@ -3,7 +3,7 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author André Pönitz
+ * \author André Pönitz
  *
  * Full author contact details are available in file CREDITS.
  */
@@ -11,19 +11,26 @@
 #include <config.h>
 
 #include "InsetMathXArrow.h"
+
 #include "MathData.h"
 #include "MathStream.h"
-#include "MathStream.h"
 #include "MathSupport.h"
 
 #include "LaTeXFeatures.h"
+#include "MetricsInfo.h"
+
+#include "support/debug.h"
+#include "support/lassert.h"
+
+#include <algorithm>
 
+using namespace std;
 
 namespace lyx {
 
 
-InsetMathXArrow::InsetMathXArrow(docstring const & name)
-       : InsetMathFracBase(), name_(name)
+InsetMathXArrow::InsetMathXArrow(Buffer * buf, docstring const & name)
+       : InsetMathFracBase(buf), name_(name)
 {}
 
 
@@ -33,36 +40,39 @@ Inset * InsetMathXArrow::clone() const
 }
 
 
-bool InsetMathXArrow::metrics(MetricsInfo & mi, Dimension & dim) const
+void InsetMathXArrow::metrics(MetricsInfo & mi, Dimension & dim) const
 {
-       ScriptChanger dummy(mi.base);
-       cell(0).metrics(mi);
-       cell(1).metrics(mi);
-       dim.wid = std::max(cell(0).width(), cell(1).width()) + 10;
-       dim.asc = cell(0).height() + 10;
-       dim.des = cell(1).height();
-       metricsMarkers(dim);
-       if (dim_ == dim)
-               return false;
-       dim_ = dim;
-       return true;
+       Changer dummy2 = mi.base.changeEnsureMath();
+       Changer dummy = mi.base.changeScript();
+       Dimension dim0;
+       cell(0).metrics(mi, dim0);
+       Dimension dim1;
+       cell(1).metrics(mi, dim1);
+       dim.wid = max(dim0.width(), dim1.width()) + 10;
+       dim.asc = dim0.height() + 10;
+       dim.des = dim1.height();
 }
 
 
 void InsetMathXArrow::draw(PainterInfo & pi, int x, int y) const
 {
-       ScriptChanger dummy(pi.base);
-       cell(0).draw(pi, x + 5, y - 10);
-       cell(1).draw(pi, x + 5, y + cell(1).height());
-       mathed_draw_deco(pi, x + 1, y - 7, width() - 2, 5, name_);
-       drawMarkers(pi, x, y);
+       Changer dummy2 = pi.base.changeEnsureMath();
+       Changer dummy = pi.base.changeScript();
+       Dimension const dim = dimension(*pi.base.bv);
+       Dimension const & dim0 = cell(0).dimension(*pi.base.bv);
+       // center the cells with the decoration
+       cell(0).draw(pi, x + dim.width()/2 - dim0.width()/2, y - 10);
+       Dimension const & dim1 = cell(1).dimension(*pi.base.bv);
+       cell(1).draw(pi, x + dim.width()/2 - dim1.width()/2, y + dim1.height());
+       mathed_draw_deco(pi, x, y - 7, dim.wid, 5, name_);
 }
 
 
-void InsetMathXArrow::write(WriteStream & os) const
+void InsetMathXArrow::write(TeXMathStream & os) const
 {
+       MathEnsurer ensurer(os);
        os << '\\' << name_;
-       if (cell(1).size())
+       if (!cell(1).empty())
                os << '[' << cell(1) << ']';
        os << '{' << cell(0) << '}';
 }
@@ -74,9 +84,92 @@ void InsetMathXArrow::normalize(NormalStream & os) const
 }
 
 
+static std::map<string, string> latex_to_html_entities = {
+               {"xleftarrow", "&larr;"},
+               {"xrightarrow", "&rarr;"},
+               {"xhookleftarrow", "&larrhk;"},
+               {"xhookrightarrow", "&rarrhk;"},
+               {"xLeftarrow", "&lArr;"},
+               {"xRightarrow", "&rArr;"},
+               {"xleftrightarrow", "&leftrightarrow;"},
+               {"xLeftrightarrow", "&Leftrightarrow;"},
+               {"xleftharpoondown", "&leftharpoondown;"},
+               {"xleftharpoonup", "&leftharpoonup;"},
+               {"xleftrightharpoons", "&leftrightharpoons;"},
+               {"xrightharpoondown", "&rightharpoondown;"},
+               {"xrightharpoonup", "&rightharpoonup;"},
+               {"xrightleftharpoons", "&rightleftharpoons;"},
+               {"xmapsto", "&mapsto;"},
+};
+
+
+static std::map<string, string> latex_to_xml_entities = {
+               {"xleftarrow", "&#x2190;"},
+               {"xrightarrow", "&#x2192;"},
+               {"xhookleftarrow", "&#x21a9;"},
+               {"xhookrightarrow", "&#x21aa;"},
+               {"xLeftarrow", "&#x21d0;"},
+               {"xRightarrow", "&#x21d2;"},
+               {"xleftrightarrow", "&#x2194;"},
+               {"xLeftrightarrow", "&#x21d4;"},
+               {"xleftharpoondown", "&#x21bd;"},
+               {"xleftharpoonup", "&#x21bc;"},
+               {"xleftrightharpoons", "&#x21cb;"},
+               {"xrightharpoondown", "&#x21c1;"},
+               {"xrightharpoonup", "&#x21c0;"},
+               {"xrightleftharpoons", "&#x21cc;"},
+               {"xmapsto", "&#x21a6;"},
+};
+
+
+docstring map_latex_to(docstring latex, bool xml = false)
+{
+       auto dict = (xml) ? latex_to_xml_entities : latex_to_html_entities;
+
+       auto mapping = dict.find(to_ascii(latex));
+       if (mapping != dict.end()) {
+               return from_ascii(mapping->second);
+       } else {
+               std::string format = (xml) ? "XML" : "HTML";
+               lyxerr << "mathmlize " << format << " conversion for '" << latex << "' not implemented" << endl;
+               LASSERT(false, return from_ascii(dict["xrightarrow"]));
+       }
+}
+
+
+void InsetMathXArrow::mathmlize(MathMLStream & ms) const
+{
+       docstring arrow = map_latex_to(name_, ms.xmlMode());
+       ms << "<" << from_ascii(ms.namespacedTag("munderover")) << " accent='false' accentunder='false'>"
+          << MTagInline("mo") << arrow << ETagInline("mo")
+          << cell(1) << cell(0)
+          << "</" << from_ascii(ms.namespacedTag("munderover"))<< ">";
+}
+
+
+void InsetMathXArrow::htmlize(HtmlStream & os) const
+{
+       docstring arrow = map_latex_to(name_);
+       os << MTag("span", "class='xarrow'")
+          << MTag("span", "class='xatop'") << cell(0) << ETag("span")
+          << MTag("span", "class='xabottom'") << arrow << ETag("span")
+          << ETag("span");
+}
+
+
 void InsetMathXArrow::validate(LaTeXFeatures & features) const
 {
-       features.require("amsmath");
+       if (name_ == "xleftarrow" || name_ == "xrightarrow")
+               features.require("amsmath");
+       else
+               features.require("mathtools");
+
+       if (features.runparams().math_flavor == OutputParams::MathAsHTML)
+               // CSS adapted from eLyXer
+               features.addCSSSnippet(
+                       "span.xarrow{display: inline-block; vertical-align: middle; text-align:center;}\n"
+                       "span.xatop{display: block;}\n"
+                       "span.xabottom{display: block;}");
        InsetMathNest::validate(features);
 }