Package: yatom
YatomBeautiful HTML/XHTML/XML using YAML.Yatom is a YAML to markup compiler supporting XML and HTML as output formats.HTML and its siblings are not friendly at all, their very convoluted and often unreadable nature (due its parent: SGML) cannot be overtaken regardless on how much effort is put on both indentation and formatting. And even that requires further postprocessing to avoid the a huge size overhead.In some way, Yatom shares the same concept as jedi/pugjs and HAML, but unless beingyaml-inspiredTM, Yatom is absolutely pure YAML, completely language agnostic, without extra stuff, requirements or incompatibilities.YAML in, HTML out, simple.UsageSimple HTML5 page using Yatom.importyatomsource='''doctype: html5html:head:title: My Yatom page!body:h2: Yatom is awesomep: >-Now, you can code your page withbeautiful markup without worryingabout inefficient HTML output norerratic linebreak behavior thanksto Yatom.'''print(yatom.HTMLProcessor.from_source(source).render())<!DOCTYPE html><html><head><title>My Yatom page!</title></head><body><h2>Yatom is awesome</h2><p>Now, you can code your page with beautiful markup without worrying about inefficient HTML output nor erratic linebreak behavior thanks to Yatom.</p></body></html>The Yatom syntaxYatom uses regular YAML, but that doesn't mean documents can of arbitrary shape.The YAML document structure is defined by the target language, but mostly all follow the following rules:YAML root must be a mapping, as mappings define the document structure.If a non-mapping value is is encountered, it is treated as text.HTML/XHTML/XMLThe YAML syntax defining an entire HTML document is quite simple. If you already know HTML you can start writing Yatom templates with very few rules:Mapping keys are tag names, with one exception:Keydoctypeis handled differently, its accepted values are listed here:html4-stricthtml4-transitionalhtml4-framesethtml5xhtml1-strictxhtml1-transitionalxhtml1-framesetxhtml11Mapping string values are treated as text content.Dot-prefixed keys are tag attributes and must appear before any other sibling keys, with some exceptions:.text for inline text strings (escaped).literal for unescaped inlined text strings (allowing inline markup).cdata for XML CDATA tags.comment for HTML commentsIn addition to previous rules, attributes support nesting, with the following rules:When style value is a mapping, properties are treated as CSS properties, and nested mapping keys are joined with dashes (-).When class value is a mapping or list, its properties are treated as different classes (the dot is prefixed). It its a mapping its hierarchy (mapping or array) is combined with dashes (-).If any other attribute value is a mapping or list, its hierarchy is combined with dashes (-).And as a bonus, and only if required by doctype, few tags provide sane defaults:Both html4 and xhtml:styleelement's attributetypedefaults totext/css.scriptelement's attributetypedefaults toapplication/javascript.Only xhtml:htmlelement has both defaultlangandxmlns.Bothstyleandscriptelement's content is automatically wrapped withCDATAtags.Semantic HTML rules are applied.ExamplesSimple example for HTML5.importyatomsource='''doctype: html5html:head:title: my pagebody:h2: my pagep: |multilinetextp:.text: mixedspan:.style:color: red.text: tags.text: andstrong: text'''print(yatom.HTMLProcessor.from_source(source).render())<!DOCTYPE html><html><head><title>my page</title></head><body><h2>my page</h2><p>multiline
text</p><p>mixed<spanstyle="color:red">tags</span>and<strong>text</strong></p></body></html>More advanced XHTML4 example.importyatomsource='''doctype: xhtml11html:head:title: my pagescript: window.alert('<hello world>')body:.data:something: 1other: 2.class:- simple:- nested- other.style:padding:top: 2embottom: 2emleft: 25%right: 25%p: some simple text'''print(yatom.HTMLProcessor.from_source(source).render())<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><htmlxmlns="http://www.w3.org/1999/xhtml"xml:lang="en"lang="en"><head><title>my page</title><scripttype="application/javascript"><![CDATA[window.alert('<hello world>')]]></script></head><bodydata-something="1"data-other="2"class="simple-nested other"style="padding-top:2em;padding-bottom:2em;padding-left:25%;padding-right:25%"><p>some simple text</p></body></html>RoadmapPretty printPluggable templating engines or logicDrop python2 for good