hxt-8.2.0: doc/hdoc/src/Text-XML-HXT-Arrow-ParserInterface.html
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<pre><a name="line-1"></a><span class='comment'>-- |</span>
<a name="line-2"></a><span class='comment'>-- interface to the HXT XML and DTD parsers</span>
<a name="line-3"></a><span class='comment'>--</span>
<a name="line-4"></a><span class='comment'>-- version: $Id: ParserInterface.hs,v 1.1 2006/05/01 18:56:24 hxml Exp $</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ParserInterface</span>
<a name="line-7"></a> <span class='layout'>(</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ParserInterface</span> <span class='layout'>)</span>
<a name="line-8"></a><span class='keyword'>where</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span>
<a name="line-11"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowList</span>
<a name="line-12"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowIf</span>
<a name="line-13"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowTree</span>
<a name="line-14"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ListArrow</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>XmlEntities</span> <span class='layout'>(</span> <span class='varid'>xmlEntities</span> <span class='layout'>)</span>
<a name="line-17"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>XhtmlEntities</span><span class='layout'>(</span> <span class='varid'>xhtmlEntities</span> <span class='layout'>)</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>Interface</span>
<a name="line-20"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>XmlArrow</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>TagSoup</span> <span class='keyword'>as</span> <span class='conid'>TS</span>
<a name="line-23"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>HtmlParsec</span> <span class='keyword'>as</span> <span class='conid'>HP</span>
<a name="line-24"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>XmlParsec</span> <span class='keyword'>as</span> <span class='conid'>XP</span>
<a name="line-25"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Parser</span><span class='varop'>.</span><span class='conid'>XmlDTDParser</span> <span class='keyword'>as</span> <span class='conid'>DP</span>
<a name="line-26"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DTDValidation</span><span class='varop'>.</span><span class='conid'>Validation</span> <span class='keyword'>as</span> <span class='conid'>VA</span>
<a name="line-27"></a>
<a name="line-28"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-29"></a>
<a name="line-30"></a><a name="parseXmlDoc"></a><span class='definition'>parseXmlDoc</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span> <span class='conid'>XmlTree</span>
<a name="line-31"></a><span class='definition'>parseXmlDoc</span> <span class='keyglyph'>=</span> <span class='varid'>arr2L</span> <span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>parseXmlDocument</span>
<a name="line-32"></a>
<a name="line-33"></a><a name="parseXmlDTDPart"></a><span class='definition'>parseXmlDTDPart</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>XmlTree</span><span class='layout'>)</span> <span class='conid'>XmlTree</span>
<a name="line-34"></a><span class='definition'>parseXmlDTDPart</span> <span class='keyglyph'>=</span> <span class='varid'>arr2L</span> <span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>parseXmlDTDPart</span>
<a name="line-35"></a>
<a name="line-36"></a><a name="parseXmlContent"></a><span class='definition'>parseXmlContent</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>String</span> <span class='conid'>XmlTree</span>
<a name="line-37"></a><span class='definition'>parseXmlContent</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>xread</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="parseXmlEntityEncodingSpec"></a><span class='definition'>parseXmlEntityEncodingSpec</span>
<a name="line-40"></a> <span class='layout'>,</span> <span class='varid'>parseXmlDocEncodingSpec</span>
<a name="line-41"></a> <span class='layout'>,</span> <span class='varid'>removeEncodingSpec</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-42"></a>
<a name="line-43"></a><a name="parseXmlDocEncodingSpec"></a><span class='definition'>parseXmlDocEncodingSpec</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>parseXmlDocEncodingSpec</span>
<a name="line-44"></a><span class='definition'>parseXmlEntityEncodingSpec</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>parseXmlEntityEncodingSpec</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="removeEncodingSpec"></a><span class='definition'>removeEncodingSpec</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>removeEncodingSpec</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="parseXmlDTDdeclPart"></a><span class='definition'>parseXmlDTDdeclPart</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-49"></a><span class='definition'>parseXmlDTDdeclPart</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>DP</span><span class='varop'>.</span><span class='varid'>parseXmlDTDdeclPart</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="parseXmlDTDdecl"></a><span class='definition'>parseXmlDTDdecl</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-52"></a><span class='definition'>parseXmlDTDdecl</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>DP</span><span class='varop'>.</span><span class='varid'>parseXmlDTDdecl</span>
<a name="line-53"></a>
<a name="line-54"></a><a name="parseXmlDTDEntityValue"></a><span class='definition'>parseXmlDTDEntityValue</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-55"></a><span class='definition'>parseXmlDTDEntityValue</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>DP</span><span class='varop'>.</span><span class='varid'>parseXmlDTDEntityValue</span>
<a name="line-56"></a>
<a name="line-57"></a><a name="parseXmlAttrValue"></a><span class='definition'>parseXmlAttrValue</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-58"></a><span class='definition'>parseXmlAttrValue</span> <span class='varid'>context</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='layout'>(</span><span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>parseXmlAttrValue</span> <span class='varid'>context</span><span class='layout'>)</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="parseXmlGeneralEntityValue"></a><span class='definition'>parseXmlGeneralEntityValue</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowXml</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-61"></a><span class='definition'>parseXmlGeneralEntityValue</span> <span class='varid'>context</span>
<a name="line-62"></a> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='layout'>(</span><span class='conid'>XP</span><span class='varop'>.</span><span class='varid'>parseXmlGeneralEntityValue</span> <span class='varid'>context</span><span class='layout'>)</span>
<a name="line-63"></a>
<a name="line-64"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="parseHtmlDoc"></a><span class='definition'>parseHtmlDoc</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span> <span class='conid'>XmlTree</span>
<a name="line-67"></a><span class='definition'>parseHtmlDoc</span> <span class='keyglyph'>=</span> <span class='varid'>arr2L</span> <span class='conid'>HP</span><span class='varop'>.</span><span class='varid'>parseHtmlDocument</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="parseHtmlContent"></a><span class='definition'>parseHtmlContent</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>String</span> <span class='conid'>XmlTree</span>
<a name="line-70"></a><span class='definition'>parseHtmlContent</span> <span class='keyglyph'>=</span> <span class='varid'>arrL</span> <span class='conid'>HP</span><span class='varop'>.</span><span class='varid'>parseHtmlContent</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="parseHtmlTagSoup"></a><span class='definition'>parseHtmlTagSoup</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='conid'>Bool</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span> <span class='conid'>XmlTree</span>
<a name="line-73"></a><span class='definition'>parseHtmlTagSoup</span> <span class='varid'>withNamespaces</span> <span class='varid'>withWarnings</span> <span class='varid'>preserveCmt</span> <span class='varid'>removeWS</span> <span class='varid'>asHtml</span>
<a name="line-74"></a> <span class='keyglyph'>=</span> <span class='varid'>arr2L</span> <span class='layout'>(</span><span class='conid'>TS</span><span class='varop'>.</span><span class='varid'>parseHtmlTagSoup</span> <span class='varid'>withNamespaces</span> <span class='varid'>withWarnings</span> <span class='varid'>preserveCmt</span> <span class='varid'>removeWS</span> <span class='varid'>asHtml</span><span class='layout'>)</span>
<a name="line-75"></a>
<a name="line-76"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="validateDoc"></a><span class='definition'>validateDoc</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-79"></a><span class='definition'>validateDoc</span> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='layout'>(</span> <span class='conid'>VA</span><span class='varop'>.</span><span class='varid'>validate</span>
<a name="line-80"></a> <span class='varop'>`when`</span>
<a name="line-81"></a> <span class='conid'>VA</span><span class='varop'>.</span><span class='varid'>getDTDSubset</span> <span class='comment'>-- validate only when DTD decl is present</span>
<a name="line-82"></a> <span class='layout'>)</span>
<a name="line-83"></a>
<a name="line-84"></a><a name="transformDoc"></a><span class='definition'>transformDoc</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-85"></a><span class='definition'>transformDoc</span> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='conid'>VA</span><span class='varop'>.</span><span class='varid'>transform</span>
<a name="line-86"></a>
<a name="line-87"></a><span class='comment'>-- old stuff</span>
<a name="line-88"></a><span class='comment'>-- validateDoc = arrL VA.validate</span>
<a name="line-89"></a><span class='comment'>-- transformDoc = arrL VA.transform</span>
<a name="line-90"></a>
<a name="line-91"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-92"></a>
<a name="line-93"></a><span class='comment'>-- | substitution of all predefined XHTMT entities for none ASCII chars</span>
<a name="line-94"></a><span class='comment'>--</span>
<a name="line-95"></a><span class='comment'>-- This arrow recurses through a whole XML tree and substitutes all</span>
<a name="line-96"></a><span class='comment'>-- entity refs within text nodes and attribute values by a text node</span>
<a name="line-97"></a><span class='comment'>-- containing of a single char corresponding to this entity.</span>
<a name="line-98"></a><span class='comment'>--</span>
<a name="line-99"></a><span class='comment'>-- Unknown entity refs remain unchanged</span>
<a name="line-100"></a>
<a name="line-101"></a><a name="substHtmlEntityRefs"></a><span class='definition'>substHtmlEntityRefs</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-102"></a><span class='definition'>substHtmlEntityRefs</span> <span class='keyglyph'>=</span> <span class='varid'>substEntityRefs</span> <span class='varid'>xhtmlEntities</span>
<a name="line-103"></a>
<a name="line-104"></a>
<a name="line-105"></a><span class='comment'>-- | substitution of the five predefined XMT entities, works like 'substHtmlEntityRefs'</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="substXmlEntityRefs"></a><span class='definition'>substXmlEntityRefs</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-108"></a><span class='definition'>substXmlEntityRefs</span> <span class='keyglyph'>=</span> <span class='varid'>substEntityRefs</span> <span class='varid'>xmlEntities</span>
<a name="line-109"></a>
<a name="line-110"></a><span class='comment'>-- | the entity substitution arrow called from 'substXmlEntityRefs' and 'substHtmlEntityRefs'</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="substEntityRefs"></a><span class='definition'>substEntityRefs</span> <span class='keyglyph'>::</span> <span class='conid'>ArrowList</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>Int</span><span class='layout'>)</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-113"></a><span class='definition'>substEntityRefs</span> <span class='varid'>entities</span>
<a name="line-114"></a> <span class='keyglyph'>=</span> <span class='varid'>fromLA</span> <span class='varid'>substEntities</span>
<a name="line-115"></a> <span class='keyword'>where</span>
<a name="line-116"></a> <span class='varid'>substEntities</span> <span class='keyglyph'>::</span> <span class='conid'>LA</span> <span class='conid'>XmlTree</span> <span class='conid'>XmlTree</span>
<a name="line-117"></a> <span class='varid'>substEntities</span>
<a name="line-118"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span>
<a name="line-119"></a> <span class='keyglyph'>[</span> <span class='varid'>isEntityRef</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>substEntity</span> <span class='varop'>$<</span> <span class='varid'>getEntityRef</span> <span class='layout'>)</span>
<a name="line-120"></a> <span class='layout'>,</span> <span class='varid'>isElem</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>processAttrl</span> <span class='layout'>(</span><span class='varid'>processChildren</span> <span class='varid'>substEntities</span><span class='layout'>)</span>
<a name="line-121"></a> <span class='varop'>>>></span>
<a name="line-122"></a> <span class='varid'>processChildren</span> <span class='varid'>substEntities</span>
<a name="line-123"></a> <span class='layout'>)</span>
<a name="line-124"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>this</span>
<a name="line-125"></a> <span class='keyglyph'>]</span>
<a name="line-126"></a> <span class='keyword'>where</span>
<a name="line-127"></a> <span class='varid'>substEntity</span> <span class='varid'>en</span>
<a name="line-128"></a> <span class='keyglyph'>=</span> <span class='keyword'>case</span> <span class='layout'>(</span><span class='varid'>lookup</span> <span class='varid'>en</span> <span class='varid'>entities</span><span class='layout'>)</span> <span class='keyword'>of</span>
<a name="line-129"></a> <span class='conid'>Just</span> <span class='varid'>i</span>
<a name="line-130"></a> <span class='keyglyph'>-></span> <span class='varid'>txt</span> <span class='keyglyph'>[</span><span class='varid'>toEnum</span> <span class='varid'>i</span><span class='keyglyph'>]</span> <span class='comment'>-- constA i >>> mkCharRef</span>
<a name="line-131"></a> <span class='conid'>Nothing</span>
<a name="line-132"></a> <span class='keyglyph'>-></span> <span class='varid'>this</span>
<a name="line-133"></a>
<a name="line-134"></a>
<a name="line-135"></a><span class='comment'>-- ------------------------------------------------------------</span>
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