<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" xmlns:px="http://www.daisy.org/ns/pipeline/xproc" xmlns:pxi="http://www.daisy.org/ns/pipeline/xproc/internal" xmlns:pf="http://www.daisy.org/ns/pipeline/functions" xmlns:d="http://www.daisy.org/ns/pipeline/data" xmlns:c="http://www.w3.org/ns/xproc-step" xmlns:cx="http://xmlcalabash.com/ns/extensions" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:map="http://www.w3.org/2005/xpath-functions/map" version="1.0" exclude-inline-prefixes="#all" type="px:css-cascade" name="main"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> <a href="http://braillespecs.github.io/braille-css/#h2_cascade">Cascade</a> and inline CSS and <a href="https://sass-lang.com/documentation">SCSS</a> style sheets in XML. Inlining is done with <code>style</code> attributes with the <a href="http://braillespecs.github.io/braille-css/#h2_style-attribute">syntax</a> described in braille CSS. Note that concretizing "inherit" is not part of cascading. </p:documentation> <p:input port="source" primary="true"/> <p:input port="source.in-memory" sequence="true"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> The input fileset containing content and style files, if a <code>d:fileset</code> document is received on the <code>source</code> port. Otherwise, the document that is received on the <code>source</code> port is interpreted as the only content document, and the <code>source.in-memory</code> port is checked for style files. Style sheets can be associated with the source in several ways: linked (using an <code>xml-stylesheet</code> processing instruction or a <code>link</code> element), embedded (using a <code>style</code> element) and/or inlined (using <code>style</code> attributes). Style sheets that are linked to from the source document, or included via the 'user-stylesheet' option, must either exist on disk, or must be part of the source fileset. </p:documentation> <p:empty/> </p:input> <p:input port="parameters" kind="parameter" primary="false"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Parameters that are passed to SCSS style sheets (as <a href="https://sass-lang.com/documentation/variables#scope">global variables</a>). They are also passed to XSLT transformations that are included from CSS through <code>@xslt</code> rules. </p:documentation> </p:input> <p:option name="parameters" select="map{}"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> This option may contain additional style sheet parameters, either as a map item, or in serialized form (Sass map). The parameters specified through this option and the ones specified through the "parameters" port are merged. </p:documentation> </p:option> <p:output port="result" primary="true"/> <p:output port="result.in-memory" sequence="true"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> The output fileset, if a <code>d:fileset</code> document was received on the <code>source</code> port. Otherwise, the <code>result</code> port holds the only output content document, and the <code>result.in-memory</code> port is empty. All styles are parsed, validated, normalized, cascaded and finally serialized into <code>style</code> attributes. Shorthand declarations such as <code>margin: a b c d</code> are decomposed as <code>margin-top: a; margin-right: b; margin-bottom: c; margin-left: d</code>. 'before' and 'after' rules are serialized as <code>&::before { ... }</code> and <code>&::after { ... }</code>. 'page' properties are replaced with the corresponding named 'page' rules (without the page type selector). If the root element does not have a 'page' property, the default page rule is inserted. 'page' rules are serialized as <code>@page { ... } @page:left { ... } @page:right { ... }</code>. The declarations that named page rules inherit from the default page rule are made explicit. The declarations that 'left' and 'right' page rules inherit from their principal page rule are also made explicit. 'volume' rules are serialized as <code>@volume { ... } @volume:first { ... } @volume:last { ... } @volume:nth(...) { ... } @volume:nth-last(...) { ... }</code> and inserted for the root element. The declarations that '@volume:first' etc. inherit from the principal volume rule are made explicit. ':nth(1)' and ':nth-last(1)' are normalized to ':first' and ':last'. A special '@volume:only' rule, which is a combination of the '@volume:first' and '@volume:last' rules, is created for the case that there is only a single volume. </p:documentation> <p:pipe step="result" port="in-memory"/> </p:output> <p:output port="result.parameters"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> A <a href="https://www.w3.org/TR/xproc/#cv.param-set"><code>c:param-set</code></a> document containing all the parameters specified on the <code>parameters</code> input port and <code>parameters</code> option, augmented with any <a href="https://sass-lang.com/documentation/variables#scope">global variables</a> declared in SCSS style sheets. Variables that are declared later take precedence, except if they are declared with <code>!default</code>. </p:documentation> <p:pipe step="result-parameters" port="result"/> </p:output> <p:option name="content-type" required="false" select="'text/html application/xhtml+xml application/x-dtbook+xml'"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> The type of document to be processed. Other input documents will be left unchanged. Ignored if the <code>source</code> port holds a document that is not a <code>d:fileset</code>. </p:documentation> </p:option> <p:option name="user-stylesheet" required="false" select="''"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Space separated list of URIs, absolute or relative to source. Applied prior to all style sheets defined within the source, but after any user agent style sheets. </p:documentation> </p:option> <p:option name="include-user-agent-stylesheet" required="false" cx:as="xs:boolean" select="false()"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Whether or not to include style sheets defined by the user agent for the given content document type (<code>content-type</code> option) and output medium (<code>media</code> option). </p:documentation> </p:option> <p:option name="type" required="false" select="'text/css text/x-scss'"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> The type of associated style sheets to apply. May be a space separated list. Allowed values are "text/css" and "text/x-scss". If omitted, all CSS and SCSS style sheets are applied. </p:documentation> </p:option> <p:option name="media" required="false" select="'embossed'"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> The target medium type as a <a href="https://www.w3.org/TR/mediaqueries-4/">media query</a>. All rules that are contained in a style sheet that matches the specified medium are included. Supported media types are "embossed", "speech" and "print". When the target medium is "embossed", CSS is interpreted according to the rules of <a href="http://braillespecs.github.io/braille-css">braille CSS</a>. Supported media features are '<a href="https://www.w3.org/TR/mediaqueries-4/#width">width</a>' and '<a href="https://www.w3.org/TR/mediaqueries-4/#height">height</a>' In addition, '<code>(counter-support: none)</code>' can be used to transform lists to preformatted lists. </p:documentation> </p:option> <p:option name="attribute-name" required="false" select="'style'"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Name of attribute to use for inlined styles. Default name is 'style'. </p:documentation> </p:option> <p:option name="multiple-attributes" required="false" cx:as="xs:boolean" select="false()"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Cascade the styles into multiple attributes per element. In this case the namespace and prefix of <code>attribute-name</code> are used for the attributes, the local part is ignored. </p:documentation> </p:option> <p:declare-step type="pxi:css-cascade"> <p:input port="source" primary="true"/> <p:input port="context" sequence="true"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Style sheets that are linked to from the source document, or included via the 'user-stylesheet' option, must either exist on disk, or must be provided in memory via this port. Style sheets on this port must be wrapped in <c:result content-type="text/plain"> elements. Style sheet URIs are resolved by matching against the context documents's base URIs. </p:documentation> </p:input> <p:output port="result"/> <p:option name="user-stylesheet"/> <p:option name="include-user-agent-stylesheet"/> <p:option name="parameters"/> <p:option name="content-type"/> <p:option name="media"/> <p:option name="type"/> <p:option name="attribute-name"/> <p:option name="multiple-attributes"/> </p:declare-step> <p:declare-step type="pxi:css-analyze"> <p:input port="source" primary="true"/> <p:input port="context" sequence="true"> <p:documentation xmlns="http://www.w3.org/1999/xhtml"> Style sheets that are linked to from the source document, or included via the 'user-stylesheet' option, must either exist on disk, or must be provided in memory via this port. Style sheets on this port must be wrapped in <c:result content-type="text/plain"> elements. Style sheet URIs are resolved by matching against the context documents's base URIs. </p:documentation> </p:input> <p:output port="result"/> <p:option name="user-stylesheet"/> <p:option name="include-user-agent-stylesheet"/> <p:option name="parameters"/> <p:option name="content-type"/> <p:option name="media"/> </p:declare-step> <p:import href="http://www.daisy.org/pipeline/modules/common-utils/library.xpl"> <p:documentation> px:parse-xml-stylesheet-instructions px:assert </p:documentation> </p:import> <p:import href="http://www.daisy.org/pipeline/modules/fileset-utils/library.xpl"> <p:documentation> px:fileset-load px:fileset-update </p:documentation> </p:import> <cx:import href="library.xsl" type="application/xslt+xml"> <p:documentation> pf:css-parse-param-set </p:documentation> </cx:import> <p:variable name="fileset-mode" cx:as="xs:boolean" select="exists(/d:fileset)"/> <p:variable name="parameter-map" select="pf:css-parse-param-set(($parameters,collection()))"> <p:pipe step="main" port="parameters"/> </p:variable> <p:choose name="css"> <p:when test="$fileset-mode"> <p:output port="result" sequence="true"/> <px:fileset-load> <p:input port="in-memory"> <p:pipe step="main" port="source.in-memory"/> </p:input> <p:with-option name="media-types" select="$type"/> </px:fileset-load> </p:when> <p:otherwise> <p:output port="result" sequence="true"/> <p:identity> <p:input port="source"> <p:empty/> </p:input> </p:identity> </p:otherwise> </p:choose> <p:sink/> <p:identity> <p:input port="source"> <p:pipe step="main" port="source"/> </p:input> </p:identity> <p:choose name="content"> <p:when test="$fileset-mode"> <p:output port="result" sequence="true" primary="true"/> <p:output port="fileset" sequence="true"> <p:pipe step="load" port="result.fileset"/> </p:output> <px:fileset-load name="load"> <p:input port="in-memory"> <p:pipe step="main" port="source.in-memory"/> </p:input> <p:with-option name="media-types" select="$content-type"/> </px:fileset-load> </p:when> <p:otherwise> <p:output port="result" sequence="true" primary="true"/> <p:output port="fileset" sequence="true"> <p:empty/> </p:output> <p:identity/> </p:otherwise> </p:choose> <p:for-each name="content-with-inlined-css"> <p:output port="result"/> <px:parse-xml-stylesheet-instructions name="xml-stylesheet-instructions" px:progress=".05"/> <p:group px:progress=".95"> <p:variable name="stylesheets-from-xml-stylesheet-instructions" cx:as="xs:string*" select="/d:fileset/d:file [not(@stylesheet-media) or pf:media-query-matches(@stylesheet-media,$media)] [(@media-type=('text/css','text/x-scss') and @media-type=tokenize($type,'\s+'))] /string(@href)"> <p:pipe step="xml-stylesheet-instructions" port="fileset"/> </p:variable> <p:sink/> <p:identity> <p:input port="source"> <p:pipe step="content-with-inlined-css" port="current"/> </p:input> </p:identity> <p:choose px:progress="1"> <p:when test="$user-stylesheet!='' or $include-user-agent-stylesheet or exists($stylesheets-from-xml-stylesheet-instructions) or //*[local-name()='style'] [not(@media) or pf:media-query-matches(@media,$media)] [(@type=('text/css','text/x-scss') and @type=tokenize($type,'\s+')) or ('text/css'=tokenize($type,'\s+') and not(@type))] or //*[local-name()='link' and @rel='stylesheet'] [not(@media) or pf:media-query-matches($media,@media)] [(@type=('text/css','text/x-scss') and @type=tokenize($type,'\s+')) or ('text/css'=tokenize($type,'\s+') and not(@type) and matches(@href,'\.css$')) or ('text/x-scss'=tokenize($type,'\s+') and not(@type) and matches(@href,'\.scss$'))] or //@style"> <pxi:css-cascade px:progress="1"> <p:input port="context"> <p:pipe step="css" port="result"/> </p:input> <p:with-option name="user-stylesheet" select="string-join(($user-stylesheet[not(.='')],$stylesheets-from-xml-stylesheet-instructions),' ')"/> <p:with-option name="include-user-agent-stylesheet" select="$include-user-agent-stylesheet"/> <p:with-option name="parameters" select="$parameter-map"/> <p:with-option name="content-type" select="$content-type"/> <p:with-option name="media" select="$media"/> <p:with-option name="type" select="$type"/> <p:with-option name="attribute-name" select="$attribute-name"/> <p:with-option name="multiple-attributes" select="$multiple-attributes"/> </pxi:css-cascade> </p:when> <p:otherwise> <p:identity/> </p:otherwise> </p:choose> </p:group> </p:for-each> <p:sink/> <p:identity> <p:input port="source"> <p:pipe step="main" port="source"/> </p:input> </p:identity> <p:group name="result-parameters" cx:pure="true"> <p:output port="result"/> <px:assert message="parameters output not supported when input is a d:fileset" error-code="XXXXX"> <p:with-option name="test" select="not($fileset-mode)"/> </px:assert> <px:parse-xml-stylesheet-instructions name="xml-stylesheet-instructions"/> <p:group> <p:variable name="stylesheets-from-xml-stylesheet-instructions" cx:as="xs:string*" select="/d:fileset/d:file [not(@stylesheet-media) or pf:media-query-matches(@stylesheet-media,$media)] [(@media-type=('text/css','text/x-scss') and @media-type=tokenize($type,'\s+'))] /string(@href)"> <p:pipe step="xml-stylesheet-instructions" port="fileset"/> </p:variable> <p:sink/> <p:identity> <p:input port="source"> <p:pipe step="main" port="source"/> </p:input> </p:identity> <p:choose> <p:when test="map:size($parameter-map)>0 or $user-stylesheet!='' or $include-user-agent-stylesheet or exists($stylesheets-from-xml-stylesheet-instructions) or //*[local-name()='style'] [not(@media) or pf:media-query-matches(@media,$media)] [(@type=('text/css','text/x-scss') and @type=tokenize($type,'\s+')) or ('text/css'=tokenize($type,'\s+') and not(@type))] or //*[local-name()='link' and @rel='stylesheet'] [not(@media) or pf:media-query-matches($media,@media)] [(@type=('text/css','text/x-scss') and @type=tokenize($type,'\s+')) or ('text/css'=tokenize($type,'\s+') and not(@type) and matches(@href,'\.css$')) or ('text/x-scss'=tokenize($type,'\s+') and not(@type) and matches(@href,'\.scss$'))]"> <pxi:css-analyze> <p:input port="context"> <p:pipe step="css" port="result"/> </p:input> <p:with-option name="user-stylesheet" select="string-join(($user-stylesheet[not(.='')], $stylesheets-from-xml-stylesheet-instructions),' ')"/> <p:with-option name="include-user-agent-stylesheet" select="$include-user-agent-stylesheet"/> <p:with-option name="parameters" select="$parameter-map"/> <p:with-option name="content-type" select="$content-type"/> <p:with-option name="media" select="$media"/> </pxi:css-analyze> </p:when> <p:otherwise> <p:parameters name="empty-param-set"> <p:input port="parameters"> <p:empty/> </p:input> </p:parameters> <p:identity> <p:input port="source"> <p:pipe step="empty-param-set" port="result"/> </p:input> </p:identity> </p:otherwise> </p:choose> </p:group> </p:group> <p:sink/> <p:choose name="result"> <p:when test="$fileset-mode"> <p:output port="fileset-or-single-content-document" primary="true"/> <p:output port="in-memory" sequence="true"> <p:pipe step="update" port="result.in-memory"/> </p:output> <px:fileset-update name="update"> <p:input port="source.fileset"> <p:pipe step="main" port="source"/> </p:input> <p:input port="source.in-memory"> <p:pipe step="main" port="source.in-memory"/> </p:input> <p:input port="update.fileset"> <p:pipe step="content" port="fileset"/> </p:input> <p:input port="update.in-memory"> <p:pipe step="content-with-inlined-css" port="result"/> </p:input> </px:fileset-update> </p:when> <p:otherwise> <p:output port="fileset-or-single-content-document" primary="true"/> <p:output port="in-memory" sequence="true"> <p:empty/> </p:output> <p:identity> <p:input port="source"> <p:pipe step="content-with-inlined-css" port="result"/> </p:input> </p:identity> </p:otherwise> </p:choose> </p:declare-step>