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Allow \limits and \nolimits to be used between or after the super- and subscripts. Report errors for double super- and subscripts for munderover constructs. Make \underbrace and \overbrace allow \limits. Resolves issue #901.

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This commit is contained in:
Davide P. Cervone 2014-09-02 08:48:50 -04:00
parent 4a4d88c26f
commit 96cf80d775
1 changed files with 45 additions and 30 deletions
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75
unpacked/jax/input/TeX/jax.js
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@ -167,6 +167,7 @@
else {item.data[0] = MML.mrow(this.primes.With({variantForm:true}),item.data[0])}
}
this.data[0].SetData(this.position,item.data[0]);
if (this.movesupsub != null) {this.data[0].movesupsub = this.movesupsub}
return STACKITEM.mml(this.data[0]);
}
if (this.SUPER(arguments).checkItem.call(this,item))
@ -1169,48 +1170,56 @@
Superscript: function (c) {
if (this.GetNext().match(/\d/)) // don't treat numbers as a unit
{this.string = this.string.substr(0,this.i+1)+" "+this.string.substr(this.i+1)}
var position, primes, base, top = this.stack.Top();
var primes, base, top = this.stack.Top();
if (top.type === "prime") {base = top.data[0]; primes = top.data[1]; this.stack.Pop()}
else {base = this.stack.Prev(); if (!base) {base = MML.mi("")}}
if (base.isEmbellishedWrapper) {base = base.data[0].data[0]}
if (base.type === "msubsup") {
if (base.data[base.sup])
{TEX.Error(["DoubleExponent","Double exponent: use braces to clarify"])}
position = base.sup;
} else if (base.movesupsub) {
if (base.type !== "munderover" || base.data[base.over]) {
if (base.movablelimits && base.isa(MML.mi)) {base = this.mi2mo(base)}
base = MML.munderover(base,null,null).With({movesupsub:true})
var movesupsub = base.movesupsub, position = base.sup;
if ((base.type === "msubsup" && base.data[base.sup]) ||
(base.type === "munderover" && base.data[base.over]))
{TEX.Error(["DoubleSubscripts","Double subscripts: use braces to clarify"])}
if (base.type !== "msubsup") {
if (movesupsub) {
if (base.type !== "munderover" || base.data[base.over]) {
if (base.movablelimits && base.isa(MML.mi)) {base = this.mi2mo(base)}
base = MML.munderover(base,null,null).With({movesupsub:true})
}
position = base.over;
} else {
base = MML.msubsup(base,null,null);
position = base.sup;
}
position = base.over;
} else {
base = MML.msubsup(base,null,null);
position = base.sup;
}
this.Push(STACKITEM.subsup(base).With({position: position, primes: primes}));
this.Push(STACKITEM.subsup(base).With({
position: position, primes: primes, movesupsub: movesupsub
}));
},
Subscript: function (c) {
if (this.GetNext().match(/\d/)) // don't treat numbers as a unit
{this.string = this.string.substr(0,this.i+1)+" "+this.string.substr(this.i+1)}
var position, primes, base, top = this.stack.Top();
var primes, base, top = this.stack.Top();
if (top.type === "prime") {base = top.data[0]; primes = top.data[1]; this.stack.Pop()}
else {base = this.stack.Prev(); if (!base) {base = MML.mi("")}}
if (base.isEmbellishedWrapper) {base = base.data[0].data[0]}
if (base.type === "msubsup") {
if (base.data[base.sub])
{TEX.Error(["DoubleSubscripts","Double subscripts: use braces to clarify"])}
position = base.sub;
} else if (base.movesupsub) {
if (base.type !== "munderover" || base.data[base.under]) {
if (base.movablelimits && base.isa(MML.mi)) {base = this.mi2mo(base)}
base = MML.munderover(base,null,null).With({movesupsub:true})
var movesupsub = base.movesupsub, position = base.sub;
if ((base.type === "msubsup" && base.data[base.sub]) ||
(base.type === "munderover" && base.data[base.under]))
{TEX.Error(["DoubleSubscripts","Double subscripts: use braces to clarify"])}
if (base.type !== "msubsup") {
if (movesupsub) {
if (base.type !== "munderover" || base.data[base.under]) {
if (base.movablelimits && base.isa(MML.mi)) {base = this.mi2mo(base)}
base = MML.munderover(base,null,null).With({movesupsub:true})
}
position = base.under;
} else {
base = MML.msubsup(base,null,null);
position = base.sub;
}
position = base.under;
} else {
base = MML.msubsup(base,null,null);
position = base.sub;
}
this.Push(STACKITEM.subsup(base).With({position: position, primes: primes}));
this.Push(STACKITEM.subsup(base).With({
position: position, primes: primes, movesupsub: movesupsub
}));
},
PRIME: "\u2032", SMARTQUOTE: "\u2019",
Prime: function (c) {
@ -1324,8 +1333,14 @@
},
Limits: function (name,limits) {
var op = this.stack.Prev("nopop");
if (!op || op.texClass !== MML.TEXCLASS.OP)
if (!op || (op.Get("texClass") !== MML.TEXCLASS.OP && op.movesupsub == null))
{TEX.Error(["MisplacedLimits","%1 is allowed only on operators",name])}
var top = this.stack.Top();
if (op.type === "munderover" && !limits) {
op = top.data[top.data.length-1] = MML.msubsup.apply(MML.subsup,op.data);
} else if (op.type === "msubsup" && limits) {
op = top.data[top.data.length-1] = MML.munderover.apply(MML.underover,op.data);
}
op.movesupsub = (limits ? true : false);
op.movablelimits = false;
},
@ -1399,9 +1414,9 @@
var base = this.ParseArg(name);
if (base.Get("movablelimits")) {base.movablelimits = false}
var mml = MML.munderover(base,null,null);
if (stack) {mml.movesupsub = true}
mml.data[mml[pos]] =
this.mmlToken(MML.mo(MML.entity("#x"+c)).With({stretchy:true, accent:(pos == "under")}));
if (stack) {mml = MML.TeXAtom(mml).With({texClass:MML.TEXCLASS.OP, movesupsub:true})}
this.Push(mml);
},