o i{9@sdZddlmZdZddlZddlmmZdZ Gdddej Z Gdd d e Z Gd d d e Z Gd d d e ZGddde ZGdddeZGdddeZGdddeZGdddeZGddde ZGddde ZGddde ZGddde ZGd d!d!e ZGd"d#d#e ZGd$d%d%e ZGd&d'd'e ZGd(d)d)e ZGd*d+d+e ZGd,d-d-e ZGd.d/d/e ZGd0d1d1e Z Gd2d3d3eZ!Gd4d5d5eZ"Gd6d7d7e Z#Gd8d9d9e Z$Gd:d;d;e Z%GdahMathML element classes based on `xml.etree`. The module is intended for programmatic generation of MathML and covers the part of `MathML Core`_ that is required by Docutil's *TeX math to MathML* converter. This module is PROVISIONAL: the API is not settled and may change with any minor Docutils version. .. _MathML Core: https://www.w3.org/TR/mathml-core/ ) annotationsreStructuredTextN)classdir displaystyleidnonce scriptlevelstyletabindexcseZdZdZdZ dZ d'fdd ZeddZd(d d Z d(d d Z d'fdd Z d'fdd Z ddZ ddZfddZddZd)ddZddZd*d'd!d"Zd'd#d$Zd+d%d&ZZS), MathElementzBase class for MathML elements.NreturnNonecs<fdd|D}tjjjfi||dS)aSet up node with `children` and `attributes`. Attribute names are normalised to lowercase. 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Append as child element and set the internal `parent` attribute. If self is already full, raise TypeError. If self is full after appending, call `self.close()` (returns first non-full anchestor or None) else return `self`. z takes only r@zdoes not take childrenr?z" .)rFr3rArr2rBrG)relementstatusr#rrr2s  zMathElement.appendcCs|}|D]}||}q|S)ziSequentially append `elements`. Return new "current node". Raise TypeError if overfull. )r2)relements current_noderIrrrrs zMathElement.extendcCs||}||=|Sr$r)rindexrIrrrpopszMathElement.popcCs>|ddurz|jWStyYdSw|ddkS)zReturn True, if `self` or an ancestor has ``display='block'``. Used to find out whether we are in inline vs. displayed maths. displayNFblock)getrBin_blockAttributeErrorrrrrrSs  zMathElement.in_block rcCst|||dS)zFormat XML output with indents. Use with care: Formatting whitespace is permanently added to the `text` and `tail` attributes of `self` and anchestors! N)ETindent)rspacelevelrrr indent_xmlszMathElement.indent_xmlcCs@|D]}t|ts|jr|j|_|jr|j|_qdS)zStrip whitespace at the end of `text` and `tail` attributes... to revert changes made by the `indent_xml()` method. Use with care, trailing whitespace from the original may be lost. N)iterr% MathTokenr1rstriptail)rrErrr unindent_xmls   zMathElement.unindent_xmlcCsNtj||pddd}z |dd}W|Sty&|d|d}Y|Sw)aReturn an XML representation of the element. By default, the return value is a `str` instance. With an explicit `encoding` argument, the result is a `bytes` instance in the specified encoding. The XML default encoding is UTF-8, any other encoding must be specified in an XML document header. Name and encoding handling match `xml.dom.minidom.Node.toxml()` while `etree.Element.tostring()` returns `bytes` by default. unicodeF)short_empty_elementsu⁡z⁡s⁡)rVtostringreplacerAencode)rencodingxmlrrrtoxmls  zMathElement.toxmlr r)r r')rM)rUrr$)r __module__ __qualname____doc__r3rBr staticmethodrr9r;r<rDrFrGr2rrOrSrZr_rg __classcell__rrr#rr <s,         r c@eZdZdZdS)MathRowz:Base class for elements treating content as a single mrow.Nrrirjrkrrrrrorocs2eZdZdZdZd fdd ZfddZZS) MathSchemazBase class for schemata expecting 2 or more children. The special attribute `switch` indicates that the last two child elements are in reversed order and must be switched before XML-export. See `msub` for an example. r rcs$|dd|_tj|i|dS)Nr,F)rOr,rr)rr kwargsr#rrrszMathSchema.__init__cs>t|}|jr|r|d|d|d<|d<d|_|S)z2Append element. Normalize order and close if full.rMF)rr2r,rF)rrIrLr#rrr2s zMathSchema.appendrh)rrirjrkr3rr2rmrrr#rrrs rrcs&eZdZdZdZdfdd ZZS)r\zgToken Element: contains textual data instead of children. Expect text data on initialisation. rr rc s@tjdi|t|ttjfstd|dt||_dS)Nz0MathToken element expects `str` or number, not "z".r)rrr%r'numbersNumber ValueErrorr1)rr1r!r#rrrs  zMathToken.__init__rh)rrirjrkr3rrmrrr#rr\sr\c@rn)mathz8Top-level MathML element, a single mathematical formula.Nrprrrrry%rqryc@rn)mtextz*Arbitrary text with no notational meaning.Nrprrrrrz,rqrzc@rn)mizCIdentifier, such as a function name, variable or symbolic constant.Nrprrrrr{0rqr{c@rn)mnzNumeric literal. >>> mn(3.41).toxml() '3.41' Normally a sequence of digits with a possible separator (a dot or a comma). (Values with comma must be specified as `str`.) Nrprrrrr|4rqr|c@rn)moaOperator, Fence, Separator, or Accent. >>> mo('<').toxml() '<' Besides operators in strict mathematical meaning, this element also includes "operators" like parentheses, separators like comma and semicolon, or "absolute value" bars. Nrprrrrr}?rqr}c@eZdZdZdZdS)mspacezBlank space, whose size is set by its attributes. Takes additional attributes `depth`, `height`, `width`. Takes no children and no text. See also `mphantom`. rNrrirjrkr3rrrrrKsrcs*eZdZdZdddZfddZZS) mrowzyGeneric element to group children as a horizontal row. Removed on closing if not required (see `mrow.close()`). r rcCsdddd}|D]&\}}|dvr)|r)||r)|||||||f}|||q dS)zTransfer attributes from self to other. "List values" (class, style) are appended to existing values, other values replace existing values.  z; )rr N)rrRr6r]r<)rother delimitersrrrrrtransfer_attributes_s   zmrow.transfer_attributesc sl|j}|dur1t|dkr1|d}z||t||<||_Wn ttfy+YdSw||tS)z|Close element and return first non-full anchestor or None. Remove if it has only one child element. Nr) rBrClistrNrTrxrrrG)rrBr*r#rrrGms   z mrow.closerh)rrirjrkrrGrmrrr#rrYs rc@rn)mfraczAFractions or fraction-like objects such as binomial coefficients.Nrprrrrrrqrc@r~)msqrtzSquare root. See also `mroot`.rNrrrrrrrc@rn)mrootz/Roots with an explicit index. See also `msqrt`.Nrprrrrrrqrc@rn)mstylezStyle Change. In modern browsers, is equivalent to an element. However, may still be relevant for compatibility with MathML implementations outside browsers. Nrprrrrrrqrc@rn)merrorz#Display contents as error messages.Nrprrrrrrqrc@r~)menclosezRenders content inside an enclosing notation... ... specified by the notation attribute. Non-standard but still required by Firefox for boxed expressions. rNrrrrrrsrc@rn)mpaddedzAdjust space around content.Nrprrrrrrqrc@r~)mphantomz8Placeholder: Rendered invisibly but dimensions are kept.rNrrrrrrrrc@rn)msubz$Attach a subscript to an expression.Nrprrrrrrqrc@rn)msupz&Attach a superscript to an expression.Nrprrrrrrqrc@r~)msubsupz;Attach both a subscript and a superscript to an expression.Nrrrrrrrrc@rn)munderz0Attach an accent or a limit under an expression.Nrprrrrrrqrc@rn)moverz/Attach an accent or a limit over an expression.Nrprrrrrrqrc@rn) munderoverz;Attach accents or limits both under and over an expression.Nrprrrrrrqrc@rn)mtablezTable or matrix element.Nrprrrrrrqrc@rn)mtrzRow in a table or a matrix.Nrprrrrrrqrc@rn)mtdzCell in a table or a matrixNrprrrrrrqr)'rk __future__r __docformat__rvxml.etree.ElementTreeetree ElementTreerVGLOBAL_ATTRIBUTESElementr rorrr\ryrzr{r|r}rrrrrrrrrrrrrrrrrrrrrrrsH  9  &