hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-DTDValidation-AttributeValueValidation.html
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<pre><a name="line-1"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='comment'>{- |
<a name="line-4"></a> Module : Text.XML.HXT.DTDValidation.TypeDefs
<a name="line-5"></a> Copyright : Copyright (C) 2008 Uwe Schmidt
<a name="line-6"></a> License : MIT
<a name="line-7"></a>
<a name="line-8"></a> Maintainer : Uwe Schmidt (uwe@fh-wedel.de)
<a name="line-9"></a> Stability : experimental
<a name="line-10"></a> Portability: portable
<a name="line-11"></a>
<a name="line-12"></a> This module provides functions for validating attributes.
<a name="line-13"></a>
<a name="line-14"></a> The main functions are:
<a name="line-15"></a>
<a name="line-16"></a> - Check if the attribute value meets the lexical constraints of its type
<a name="line-17"></a>
<a name="line-18"></a> - Normalization of an attribute value
<a name="line-19"></a>-}</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='comment'>-- Special namings in source code:</span>
<a name="line-24"></a><span class='comment'>--</span>
<a name="line-25"></a><span class='comment'>-- - nd - XDTD node</span>
<a name="line-26"></a><span class='comment'>--</span>
<a name="line-27"></a><span class='comment'>-- - n - XTag node</span>
<a name="line-28"></a><span class='comment'>--</span>
<a name="line-29"></a>
<a name="line-30"></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'>DTDValidation</span><span class='varop'>.</span><span class='conid'>AttributeValueValidation</span>
<a name="line-31"></a> <span class='layout'>(</span> <span class='varid'>checkAttributeValue</span>
<a name="line-32"></a> <span class='layout'>,</span> <span class='varid'>normalizeAttributeValue</span>
<a name="line-33"></a> <span class='layout'>)</span>
<a name="line-34"></a><span class='keyword'>where</span>
<a name="line-35"></a>
<a name="line-36"></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'>XmlParsec</span>
<a name="line-37"></a> <span class='layout'>(</span> <span class='varid'>parseNMToken</span>
<a name="line-38"></a> <span class='layout'>,</span> <span class='varid'>parseName</span>
<a name="line-39"></a> <span class='layout'>)</span>
<a name="line-40"></a>
<a name="line-41"></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'>DTDValidation</span><span class='varop'>.</span><span class='conid'>TypeDefs</span>
<a name="line-42"></a>
<a name="line-43"></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'>Util</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='comment'>-- |</span>
<a name="line-46"></a><span class='comment'>-- Checks if the attribute value meets the lexical constraints of its type.</span>
<a name="line-47"></a><span class='comment'>--</span>
<a name="line-48"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-49"></a><span class='comment'>--</span>
<a name="line-50"></a><span class='comment'>-- - 2.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-51"></a><span class='comment'>--</span>
<a name="line-52"></a><span class='comment'>-- - returns : a function which takes an element (XTag or XDTD ATTLIST),</span>
<a name="line-53"></a><span class='comment'>-- checks if the attribute value meets the lexical constraints</span>
<a name="line-54"></a><span class='comment'>-- of its type and returns a list of errors</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="checkAttributeValue"></a><span class='definition'>checkAttributeValue</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-57"></a><span class='definition'>checkAttributeValue</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span>
<a name="line-58"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-59"></a> <span class='keyglyph'>=</span> <span class='varid'>choiceA</span>
<a name="line-60"></a> <span class='keyglyph'>[</span> <span class='varid'>isElem</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>checkAttrVal</span> <span class='varop'>$<</span> <span class='varid'>getAttrValue</span> <span class='varid'>attrName</span> <span class='layout'>)</span>
<a name="line-61"></a> <span class='layout'>,</span> <span class='varid'>isDTDAttlist</span> <span class='conop'>:-></span> <span class='layout'>(</span> <span class='varid'>checkAttrVal</span> <span class='varop'>$<</span> <span class='layout'>(</span><span class='varid'>getDTDAttrl</span> <span class='varop'>>>^</span> <span class='varid'>dtd_default</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-62"></a> <span class='layout'>,</span> <span class='varid'>this</span> <span class='conop'>:-></span> <span class='varid'>none</span>
<a name="line-63"></a> <span class='keyglyph'>]</span>
<a name="line-64"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-65"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-66"></a> <span class='keyword'>where</span>
<a name="line-67"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-68"></a> <span class='varid'>attrName</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_value</span> <span class='varid'>al</span>
<a name="line-69"></a> <span class='varid'>attrType</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_type</span> <span class='varid'>al</span>
<a name="line-70"></a> <span class='varid'>checkAttrVal</span> <span class='varid'>attrValue</span>
<a name="line-71"></a> <span class='keyglyph'>=</span> <span class='varid'>checkValue</span> <span class='varid'>attrType</span> <span class='varid'>dtdPart</span> <span class='varid'>normalizedVal</span> <span class='varid'>attrDecl</span>
<a name="line-72"></a> <span class='keyword'>where</span>
<a name="line-73"></a> <span class='varid'>normalizedVal</span> <span class='keyglyph'>=</span> <span class='varid'>normalizeAttributeValue</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>attrDecl</span><span class='layout'>)</span> <span class='varid'>attrValue</span>
<a name="line-74"></a>
<a name="line-75"></a><span class='comment'>-- |</span>
<a name="line-76"></a><span class='comment'>-- Dispatches the attibute check by the attribute type.</span>
<a name="line-77"></a><span class='comment'>--</span>
<a name="line-78"></a><span class='comment'>-- * 1.parameter typ : the attribute type</span>
<a name="line-79"></a><span class='comment'>--</span>
<a name="line-80"></a><span class='comment'>-- - 2.parameter dtdPart : the children of the @DOCTYPE@ node</span>
<a name="line-81"></a><span class='comment'>--</span>
<a name="line-82"></a><span class='comment'>-- - 3.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-83"></a><span class='comment'>--</span>
<a name="line-84"></a><span class='comment'>-- - 4.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-85"></a><span class='comment'>--</span>
<a name="line-86"></a><span class='comment'>-- - returns : a functions which takes an element (XTag or XDTD ATTLIST),</span>
<a name="line-87"></a><span class='comment'>-- checks if the attribute value meets the lexical constraints</span>
<a name="line-88"></a><span class='comment'>-- of its type and returns a list of errors</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="checkValue"></a><span class='definition'>checkValue</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-91"></a><span class='definition'>checkValue</span> <span class='varid'>typ</span> <span class='varid'>dtdPart</span> <span class='varid'>attrValue</span> <span class='varid'>attrDecl</span>
<a name="line-92"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_cdata</span> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-93"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_enumeration</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueEnumeration</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-94"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_entity</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueEntity</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-95"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_entities</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueEntities</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-96"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_id</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueId</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-97"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_idref</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueIdref</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-98"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_idrefs</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueIdrefs</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-99"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_nmtoken</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueNmtoken</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-100"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_nmtokens</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueNmtokens</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-101"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_notation</span> <span class='keyglyph'>=</span> <span class='varid'>checkValueEnumeration</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-102"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"Attribute type "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>typ</span> <span class='varop'>++</span> <span class='str'>" unknown."</span><span class='layout'>)</span>
<a name="line-103"></a>
<a name="line-104"></a><span class='comment'>-- |</span>
<a name="line-105"></a><span class='comment'>-- Checks the value of Enumeration attribute types. (3.3.1 \/ p.27 in Spec)</span>
<a name="line-106"></a><span class='comment'>--</span>
<a name="line-107"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-108"></a><span class='comment'>--</span>
<a name="line-109"></a><span class='comment'>-- - 2.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-110"></a>
<a name="line-111"></a><a name="checkValueEnumeration"></a><span class='definition'>checkValueEnumeration</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-112"></a><span class='definition'>checkValueEnumeration</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-113"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-114"></a> <span class='varop'>&&</span>
<a name="line-115"></a> <span class='varid'>attrValue</span> <span class='varop'>`notElem`</span> <span class='varid'>enumVals</span>
<a name="line-116"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" for element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-117"></a> <span class='str'>" must have a value from list "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>enumVals</span> <span class='comment'>{- ++ " but has value " ++ show attrValue-}</span> <span class='varop'>++</span> <span class='str'>"."</span><span class='layout'>)</span>
<a name="line-118"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-119"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-120"></a> <span class='keyword'>where</span>
<a name="line-121"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-122"></a>
<a name="line-123"></a> <span class='varid'>enumVals</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span>
<a name="line-124"></a> <span class='varid'>enumVals</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='layout'>(</span><span class='varid'>runLA</span> <span class='varid'>getChildren</span> <span class='varid'>attrDecl</span><span class='layout'>)</span>
<a name="line-125"></a>
<a name="line-126"></a><span class='comment'>-- |</span>
<a name="line-127"></a><span class='comment'>-- Checks the value of ENTITY attribute types. (3.3.1 \/ p.26 in Spec)</span>
<a name="line-128"></a><span class='comment'>--</span>
<a name="line-129"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node, to get the</span>
<a name="line-130"></a><span class='comment'>-- unparsed entity declarations</span>
<a name="line-131"></a><span class='comment'>--</span>
<a name="line-132"></a><span class='comment'>-- - 2.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-133"></a><span class='comment'>--</span>
<a name="line-134"></a><span class='comment'>-- - 3.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="checkValueEntity"></a><span class='definition'>checkValueEntity</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-137"></a><span class='definition'>checkValueEntity</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-138"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-139"></a> <span class='varop'>&&</span>
<a name="line-140"></a> <span class='varid'>attrValue</span> <span class='varop'>`notElem`</span> <span class='varid'>upEntities</span>
<a name="line-141"></a> <span class='keyglyph'>=</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Entity "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attrValue</span> <span class='varop'>++</span> <span class='str'>" of attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-142"></a> <span class='str'>" for element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" is not unparsed. "</span> <span class='varop'>++</span>
<a name="line-143"></a> <span class='str'>"The following unparsed entities exist: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>upEntities</span> <span class='varop'>++</span> <span class='str'>"."</span><span class='layout'>)</span>
<a name="line-144"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-145"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-146"></a> <span class='keyword'>where</span>
<a name="line-147"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-148"></a>
<a name="line-149"></a> <span class='varid'>upEntities</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>String</span><span class='keyglyph'>]</span>
<a name="line-150"></a> <span class='varid'>upEntities</span> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varop'>.</span> <span class='varid'>getDTDAttributes</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>isUnparsedEntity</span> <span class='varop'>$$</span> <span class='varid'>dtdPart</span><span class='layout'>)</span>
<a name="line-151"></a>
<a name="line-152"></a><span class='comment'>-- |</span>
<a name="line-153"></a><span class='comment'>-- Checks the value of ENTITIES attribute types. (3.3.1 \/ p.26 in Spec)</span>
<a name="line-154"></a><span class='comment'>--</span>
<a name="line-155"></a><span class='comment'>-- * 1.parameter dtdPart : the children of the @DOCTYPE@ node, to get the</span>
<a name="line-156"></a><span class='comment'>-- unparsed entity declarations</span>
<a name="line-157"></a><span class='comment'>--</span>
<a name="line-158"></a><span class='comment'>-- - 2.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-159"></a><span class='comment'>--</span>
<a name="line-160"></a><span class='comment'>-- - 3.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-161"></a>
<a name="line-162"></a><a name="checkValueEntities"></a><span class='definition'>checkValueEntities</span> <span class='keyglyph'>::</span><span class='conid'>XmlTrees</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-163"></a><span class='definition'>checkValueEntities</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-164"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-165"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>null</span> <span class='varid'>valueList</span>
<a name="line-166"></a> <span class='keyword'>then</span> <span class='varid'>err</span> <span class='layout'>(</span><span class='str'>"Attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" of element "</span> <span class='varop'>++</span>
<a name="line-167"></a> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" must be one or more names."</span><span class='layout'>)</span>
<a name="line-168"></a> <span class='keyword'>else</span> <span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>checkValueEntity</span> <span class='varid'>dtdPart</span> <span class='varid'>attrDecl</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>valueList</span>
<a name="line-169"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-170"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-171"></a> <span class='keyword'>where</span>
<a name="line-172"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-173"></a> <span class='varid'>valueList</span> <span class='keyglyph'>=</span> <span class='varid'>words</span> <span class='varid'>attrValue</span>
<a name="line-174"></a>
<a name="line-175"></a><span class='comment'>-- |</span>
<a name="line-176"></a><span class='comment'>-- Checks the value of NMTOKEN attribute types. (3.3.1 \/ p.26 in Spec)</span>
<a name="line-177"></a><span class='comment'>--</span>
<a name="line-178"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-179"></a><span class='comment'>--</span>
<a name="line-180"></a><span class='comment'>-- - 2.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-181"></a>
<a name="line-182"></a><a name="checkValueNmtoken"></a><span class='definition'>checkValueNmtoken</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-183"></a><span class='definition'>checkValueNmtoken</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-184"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-185"></a> <span class='keyglyph'>=</span> <span class='varid'>constA</span> <span class='varid'>attrValue</span> <span class='varop'>>>></span> <span class='varid'>checkNmtoken</span>
<a name="line-186"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-187"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-188"></a> <span class='keyword'>where</span>
<a name="line-189"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-190"></a> <span class='varid'>checkNmtoken</span>
<a name="line-191"></a> <span class='keyglyph'>=</span> <span class='varid'>mkText</span> <span class='varop'>>>></span> <span class='varid'>arrL</span> <span class='layout'>(</span><span class='varid'>parseNMToken</span> <span class='str'>""</span><span class='layout'>)</span>
<a name="line-192"></a> <span class='varop'>>>></span>
<a name="line-193"></a> <span class='varid'>isError</span>
<a name="line-194"></a> <span class='varop'>>>></span>
<a name="line-195"></a> <span class='varid'>getErrorMsg</span>
<a name="line-196"></a> <span class='varop'>>>></span>
<a name="line-197"></a> <span class='varid'>arr</span> <span class='layout'>(</span><span class='keyglyph'>\</span> <span class='varid'>s</span> <span class='keyglyph'>-></span> <span class='layout'>(</span> <span class='str'>"Attribute value "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attrValue</span> <span class='varop'>++</span> <span class='str'>" of attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-198"></a> <span class='str'>" for element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" must be a name token, "</span><span class='varop'>++</span> <span class='layout'>(</span><span class='varid'>lines</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='varop'>!!</span> <span class='num'>1</span> <span class='varop'>++</span><span class='str'>"."</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-199"></a> <span class='varop'>>>></span>
<a name="line-200"></a> <span class='varid'>mkError</span> <span class='varid'>c_err</span>
<a name="line-201"></a>
<a name="line-202"></a><span class='comment'>-- |</span>
<a name="line-203"></a><span class='comment'>-- Checks the value of NMTOKENS attribute types. (3.3.1 \/ p.26 in Spec)</span>
<a name="line-204"></a><span class='comment'>--</span>
<a name="line-205"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-206"></a><span class='comment'>--</span>
<a name="line-207"></a><span class='comment'>-- - 2.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-208"></a>
<a name="line-209"></a><a name="checkValueNmtokens"></a><span class='definition'>checkValueNmtokens</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-210"></a><span class='definition'>checkValueNmtokens</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-211"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-212"></a> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>null</span> <span class='varid'>valueList</span>
<a name="line-213"></a> <span class='keyword'>then</span> <span class='varid'>err</span> <span class='layout'>(</span> <span class='str'>"Attribute "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span><span class='str'>" of element "</span> <span class='varop'>++</span>
<a name="line-214"></a> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" must be one or more name tokens."</span><span class='layout'>)</span>
<a name="line-215"></a> <span class='keyword'>else</span> <span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>checkValueNmtoken</span> <span class='varid'>attrDecl</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>valueList</span>
<a name="line-216"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-217"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-218"></a> <span class='keyword'>where</span>
<a name="line-219"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-220"></a> <span class='varid'>valueList</span> <span class='keyglyph'>=</span> <span class='varid'>words</span> <span class='varid'>attrValue</span>
<a name="line-221"></a>
<a name="line-222"></a><span class='comment'>-- |</span>
<a name="line-223"></a><span class='comment'>-- Checks the value of ID attribute types. (3.3.1 \/ p.25 in Spec)</span>
<a name="line-224"></a><span class='comment'>--</span>
<a name="line-225"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-226"></a><span class='comment'>--</span>
<a name="line-227"></a><span class='comment'>-- - 2.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-228"></a>
<a name="line-229"></a><a name="checkValueId"></a><span class='definition'>checkValueId</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-230"></a><span class='definition'>checkValueId</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-231"></a> <span class='keyglyph'>=</span> <span class='varid'>checkForName</span> <span class='str'>"Attribute value"</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-232"></a>
<a name="line-233"></a>
<a name="line-234"></a><span class='comment'>-- |</span>
<a name="line-235"></a><span class='comment'>-- Checks the value of IDREF attribute types. (3.3.1 \/ p.26 in Spec)</span>
<a name="line-236"></a><span class='comment'>--</span>
<a name="line-237"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-238"></a><span class='comment'>--</span>
<a name="line-239"></a><span class='comment'>-- - 2.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-240"></a>
<a name="line-241"></a><a name="checkValueIdref"></a><span class='definition'>checkValueIdref</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-242"></a><span class='definition'>checkValueIdref</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-243"></a> <span class='keyglyph'>=</span> <span class='varid'>checkForName</span> <span class='str'>"Attribute value"</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-244"></a>
<a name="line-245"></a>
<a name="line-246"></a><span class='comment'>-- |</span>
<a name="line-247"></a><span class='comment'>-- Checks the value of IDREFS attribute types. (3.3.1 \/ p.26 in Spec)</span>
<a name="line-248"></a><span class='comment'>--</span>
<a name="line-249"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-250"></a><span class='comment'>--</span>
<a name="line-251"></a><span class='comment'>-- - 2.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-252"></a>
<a name="line-253"></a><a name="checkValueIdrefs"></a><span class='definition'>checkValueIdrefs</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-254"></a><span class='definition'>checkValueIdrefs</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-255"></a> <span class='keyglyph'>=</span> <span class='varid'>catA</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>checkValueIdref</span> <span class='varid'>attrDecl</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>words</span> <span class='varop'>$</span> <span class='varid'>attrValue</span>
<a name="line-256"></a>
<a name="line-257"></a>
<a name="line-258"></a>
<a name="line-259"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-260"></a><span class='comment'>-- General helper functions for checking attribute values</span>
<a name="line-261"></a><span class='comment'>--</span>
<a name="line-262"></a>
<a name="line-263"></a><span class='comment'>-- |</span>
<a name="line-264"></a><span class='comment'>-- Checks if the value of an attribute is a name.</span>
<a name="line-265"></a><span class='comment'>--</span>
<a name="line-266"></a><span class='comment'>-- * 1.parameter msg : error message, should be "Entity" or "Attribute value"</span>
<a name="line-267"></a><span class='comment'>--</span>
<a name="line-268"></a><span class='comment'>-- - 2.parameter attrDecl : the declaration of the attribute from the DTD</span>
<a name="line-269"></a><span class='comment'>--</span>
<a name="line-270"></a><span class='comment'>-- - 3.parameter attrValue : the normalized attribute value to be checked</span>
<a name="line-271"></a>
<a name="line-272"></a><a name="checkForName"></a><span class='definition'>checkForName</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>XmlArrow</span>
<a name="line-273"></a><span class='definition'>checkForName</span> <span class='varid'>msg</span> <span class='varid'>attrDecl</span> <span class='varid'>attrValue</span>
<a name="line-274"></a> <span class='keyglyph'>|</span> <span class='varid'>isDTDAttlistNode</span> <span class='varid'>attrDecl</span>
<a name="line-275"></a> <span class='keyglyph'>=</span> <span class='varid'>constA</span> <span class='varid'>attrValue</span> <span class='varop'>>>></span> <span class='varid'>checkName</span>
<a name="line-276"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span>
<a name="line-277"></a> <span class='keyglyph'>=</span> <span class='varid'>none</span>
<a name="line-278"></a> <span class='keyword'>where</span>
<a name="line-279"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-280"></a> <span class='varid'>checkName</span>
<a name="line-281"></a> <span class='keyglyph'>=</span> <span class='varid'>mkText</span> <span class='varop'>>>></span> <span class='varid'>arrL</span> <span class='layout'>(</span><span class='varid'>parseName</span> <span class='str'>""</span><span class='layout'>)</span>
<a name="line-282"></a> <span class='varop'>>>></span>
<a name="line-283"></a> <span class='varid'>isError</span>
<a name="line-284"></a> <span class='varop'>>>></span>
<a name="line-285"></a> <span class='varid'>getErrorMsg</span>
<a name="line-286"></a> <span class='varop'>>>></span>
<a name="line-287"></a> <span class='varid'>arr</span> <span class='layout'>(</span><span class='keyglyph'>\</span><span class='varid'>s</span> <span class='keyglyph'>-></span> <span class='layout'>(</span> <span class='varid'>msg</span> <span class='varop'>++</span> <span class='str'>" "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>attrValue</span> <span class='varop'>++</span><span class='str'>" of attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_value</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span>
<a name="line-288"></a> <span class='str'>" for element "</span><span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>dtd_name</span> <span class='varid'>al</span><span class='layout'>)</span> <span class='varop'>++</span><span class='str'>" must be a name, "</span> <span class='varop'>++</span> <span class='layout'>(</span><span class='varid'>lines</span> <span class='varid'>s</span><span class='layout'>)</span> <span class='varop'>!!</span> <span class='num'>1</span> <span class='varop'>++</span> <span class='str'>"."</span><span class='layout'>)</span> <span class='layout'>)</span>
<a name="line-289"></a> <span class='varop'>>>></span>
<a name="line-290"></a> <span class='varid'>mkError</span> <span class='varid'>c_err</span>
<a name="line-291"></a>
<a name="line-292"></a><span class='comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-293"></a>
<a name="line-294"></a><a name="normalizeAttributeValue"></a><span class='comment'>-- |</span>
<a name="line-295"></a><span class='comment'>-- Normalizes an attribute value with respect to its type. (3.3.3 \/ p.29 in Spec)</span>
<a name="line-296"></a><span class='comment'>--</span>
<a name="line-297"></a><span class='comment'>-- * 1.parameter attrDecl : the declaration of the attribute from the DTD. Expected</span>
<a name="line-298"></a><span class='comment'>-- is a list. If the list is empty, no declaration exists.</span>
<a name="line-299"></a><span class='comment'>--</span>
<a name="line-300"></a><span class='comment'>-- - 2.parameter value : the attribute value to be normalized</span>
<a name="line-301"></a><span class='comment'>--</span>
<a name="line-302"></a><span class='comment'>-- - returns : the normalized value</span>
<a name="line-303"></a><span class='comment'>--</span>
<a name="line-304"></a><span class='definition'>normalizeAttributeValue</span> <span class='keyglyph'>::</span> <span class='conid'>Maybe</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-305"></a><span class='definition'>normalizeAttributeValue</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='varid'>attrDecl</span><span class='layout'>)</span> <span class='varid'>value</span>
<a name="line-306"></a> <span class='keyglyph'>=</span> <span class='varid'>normalizeAttribute</span> <span class='varid'>attrType</span>
<a name="line-307"></a> <span class='keyword'>where</span>
<a name="line-308"></a> <span class='varid'>al</span> <span class='keyglyph'>=</span> <span class='varid'>getDTDAttributes</span> <span class='varid'>attrDecl</span>
<a name="line-309"></a> <span class='varid'>attrType</span> <span class='keyglyph'>=</span> <span class='varid'>dtd_type</span> <span class='varid'>al</span>
<a name="line-310"></a>
<a name="line-311"></a> <span class='varid'>normalizeAttribute</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-312"></a> <span class='varid'>normalizeAttribute</span> <span class='varid'>typ</span>
<a name="line-313"></a> <span class='keyglyph'>|</span> <span class='varid'>typ</span> <span class='varop'>==</span> <span class='varid'>k_cdata</span> <span class='keyglyph'>=</span> <span class='varid'>cdataNormalization</span> <span class='varid'>value</span>
<a name="line-314"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>otherNormalization</span> <span class='varid'>value</span>
<a name="line-315"></a>
<a name="line-316"></a><span class='comment'>-- Attribute not declared in DTD, normalization as CDATA</span>
<a name="line-317"></a><span class='definition'>normalizeAttributeValue</span> <span class='conid'>Nothing</span> <span class='varid'>value</span>
<a name="line-318"></a> <span class='keyglyph'>=</span> <span class='varid'>cdataNormalization</span> <span class='varid'>value</span>
<a name="line-319"></a>
<a name="line-320"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-321"></a><span class='comment'>-- Helper functions for normalization</span>
<a name="line-322"></a>
<a name="line-323"></a><span class='comment'>-- |</span>
<a name="line-324"></a><span class='comment'>-- Normalization of CDATA attribute values.</span>
<a name="line-325"></a><span class='comment'>-- is already done when parsing</span>
<a name="line-326"></a><span class='comment'>-- during entity substituion for attribute values</span>
<a name="line-327"></a>
<a name="line-328"></a><a name="cdataNormalization"></a><span class='definition'>cdataNormalization</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-329"></a><span class='definition'>cdataNormalization</span> <span class='keyglyph'>=</span> <span class='varid'>id</span>
<a name="line-330"></a>
<a name="line-331"></a><span class='comment'>-- | Normalization of attribute values other than CDATA.</span>
<a name="line-332"></a>
<a name="line-333"></a><a name="otherNormalization"></a><span class='definition'>otherNormalization</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-334"></a><span class='definition'>otherNormalization</span> <span class='keyglyph'>=</span> <span class='varid'>reduceWSSequences</span> <span class='varop'>.</span> <span class='varid'>stringTrim</span> <span class='varop'>.</span> <span class='varid'>cdataNormalization</span>
<a name="line-335"></a>
<a name="line-336"></a><span class='comment'>-- | Reduce whitespace sequences to a single whitespace.</span>
<a name="line-337"></a>
<a name="line-338"></a><a name="reduceWSSequences"></a><span class='definition'>reduceWSSequences</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-339"></a><span class='definition'>reduceWSSequences</span> <span class='varid'>str</span> <span class='keyglyph'>=</span> <span class='varid'>unwords</span> <span class='layout'>(</span><span class='varid'>words</span> <span class='varid'>str</span><span class='layout'>)</span>
<a name="line-340"></a>
<a name="line-341"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-342"></a>
</pre></body>
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