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Refactor toggle attribute #663

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Refactor toggle attribute #663

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9c8351b
Simplify boolean logic for toggleAttribute()
jonathanKingston Jun 29, 2018
63a9c3e
Abstract away comon logic in toggleAttribute() and setAttribute() to …
jonathanKingston Jun 29, 2018
543336c
Abstract away creating an attribute from toggleAttribute() and setAtt…
jonathanKingston Jun 29, 2018
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82 changes: 46 additions & 36 deletions dom.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -6189,6 +6189,40 @@ in an <a for="/">element</a> <var>element</var>, run these steps:

<hr>


To <dfn export id=concept-element-attributes-set-by-name>create an attribute by value</dfn>
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Maybe we should name this "create and append an attribute"? Or maybe I don't understand "by value".

The other thing I'm thinking is that it would be nice if https://dom.spec.whatwg.org/#concept-element-attributes-set-value could invoke this algorithm as well. That would require additional arguments for namespace/prefix, but seems doable.

given a <var>qualifiedName</var>, <var>value</var> and <a for="/">element</a> <var>element</var>, run these steps:

<ol>
<li><p>Create an <a>attribute</a> whose
<a for="Attr">local name</a> is <var>qualifiedName</var>, <a for=Attr>value</a> is
<var>value</var>, and <a for=Node>node document</a> is <a>context object</a>'s
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the context object* throughout

<a for=Node>node document</a>.

<li><a lt="append an attribute">Append</a> this <a>attribute</a> to
<a>element</a>
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You want <var>element</var> here and a dot.


<li>Return.
</ol>

To <dfn export id=concept-element-attributes-get-valid-by-name>get a valid attribute by name</dfn>
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"validate and get an attribute by name" perhaps?

given a <var>qualifiedName</var>, and <a for="/">element</a> <var>element</var>, run these steps:

<ol>
<li><p>If <var>qualifiedName</var> does not match the <code><a type>Name</a></code> production in
XML, then <a>throw</a> an "{{InvalidCharacterError!!exception}}" {{DOMException}}.

<li><p>If <var>element</var> is in the <a>HTML namespace</a> and its <a for=Node>node document</a>
is an <a>HTML document</a>, then set <var>qualifiedName</var> to <var>qualifiedName</var> in
<a>ASCII lowercase</a>.

<!-- This is step 2 of "get an attribute by name", modified as appropriate -->
<li><p>Let <var>attribute</var> be the first <a>attribute</a> in <var>element</var>'s <a for=Element>attribute list</a>
whose <a for=Attr>qualified name</a> is <var>qualifiedName</var>, and null otherwise.

<li>Return <var>qualifiedName</var>, and <var>attribute</var>.
</ol>

To <dfn export id=concept-element-attributes-get-by-name>get an attribute by name</dfn> given a
<var>qualifiedName</var> and <a for="/">element</a> <var>element</var>, run these steps:

Expand Down Expand Up @@ -6528,23 +6562,10 @@ method, when invoked, must these steps:
method, when invoked, must run these steps:

<ol>
<li><p>If <var>qualifiedName</var> does not match the <code><a type>Name</a></code> production in
XML, then <a>throw</a> an "{{InvalidCharacterError!!exception}}" {{DOMException}}.

<li><p>If the <a>context object</a> is in the <a>HTML namespace</a> and its
<a for=Node>node document</a> is an <a>HTML document</a>, then set <var>qualifiedName</var> to
<var>qualifiedName</var> in <a>ASCII lowercase</a>.
<li><p>Let <var>qualifiedName</var> and <var>attribute</var> be the result of running <a>get a valid attribute by name</a> given the <var>qualifiedName</var> and <a>context object</a>

<li><p>Let <var>attribute</var> be the first <a>attribute</a> in <a>context object</a>'s
<a for=Element>attribute list</a> whose <a for=Attr>qualified name</a> is <var>qualifiedName</var>,
and null otherwise.
<!-- This is step 2 of "get an attribute by name", modified as appropriate -->

<li><p>If <var>attribute</var> is null, create an <a>attribute</a> whose
<a for="Attr">local name</a> is <var>qualifiedName</var>, <a for=Attr>value</a> is
<var>value</var>, and <a for=Node>node document</a> is <a>context object</a>'s
<a for=Node>node document</a>, then <a lt="append an attribute">append</a> this <a>attribute</a> to
<a>context object</a>, and then return.
<li><p>If <var>attribute</var> is null, run <a>create an attribute by value</a> given the <var>qualifiedName</var>, <var>value</var> and <a>context object</a>, and then return.

<li><p><a lt="change an attribute">Change</a> <var>attribute</var> from <a>context object</a> to
<var>value</var>.
Expand Down Expand Up @@ -6590,36 +6611,25 @@ when invoked, must run these steps:
method, when invoked, must run these steps:

<ol>
<li><p>If <var>qualifiedName</var> does not match the <code><a type>Name</a></code> production in
XML, then <a>throw</a> an "{{InvalidCharacterError!!exception}}" {{DOMException}}.

<li><p>If the <a>context object</a> is in the <a>HTML namespace</a> and its
<a for=Node>node document</a> is an <a>HTML document</a>, then set <var>qualifiedName</var> to
<var>qualifiedName</var> in <a>ASCII lowercase</a>.

<li><p>Let <var>attribute</var> be the first <a>attribute</a> in the <a>context object</a>'s
<a for=Element>attribute list</a> whose <a for=Attr>qualified name</a> is <var>qualifiedName</var>,
and null otherwise.
<!-- This is step 2 of "get an attribute by name", modified as appropriate -->
<li><p>Let <var>qualifiedName</var> and <var>attribute</var> be the result of running <a>get a valid attribute by name</a> given the <var>qualifiedName</var> and <a>context object</a>

<li>
<p>If <var>attribute</var> is null, then:

<ol>
<li><p>If <var>force</var> is not given or is true, create an <a>attribute</a> whose
<a for="Attr">local name</a> is <var>qualifiedName</var>, <a for=Attr>value</a> is the empty
string, and <a for=Node>node document</a> is the <a>context object</a>'s
<a for=Node>node document</a>, then <a lt="append an attribute">append</a> this <a>attribute</a>
to the <a>context object</a>, and then return true.
<li><p>If <var>force</var> is given and is false, return false.

<li><p>Return false.
<li><p>Run <a>create an attribute by value</a> given the <var>qualifiedName</var>, <var>the empty string</var> and <a>context object</a>.

<li>Return true.
</ol>

<li><p>Otherwise, if <var>force</var> is not given or is false,
<a lt="remove an attribute by name">remove an attribute</a> given <var>qualifiedName</var> and the
<a>context object</a>, and then return false.
<li><p>Otherwise, if <var>force</var> is given and is true, return true.

<li><p>Return true.
<li><p><a lt="remove an attribute by name">Remove an attribute</a> given <var>qualifiedName</var> and the
<a>context object</a>.

<li>Return false.
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<li><p> (also above)

</ol>

<p>The
Expand Down